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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 661. Отображено 141.
05-09-2017 дата публикации

Catalyst systems for olefin polymerization

Номер: US0009751998B2

The instant invention provides procatalysts and catalyst systems for olefin polymerization, olefin based polymers polymerized therewith, and process for producing the same. In one embodiment, the instant invention provides a procatalyst comprising a metal-ligand complex of formula (I).

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01-05-2013 дата публикации

Fractional melt index polyethylene composition and films made therefrom

Номер: CN103080207A
Принадлежит:

A reactor blend polyethylene composition comprising: from 35 to 70 percent by weight of a first polyethylene component; and a second polyethylene component; wherein the polyethylene resin has a melt index I2 of less than 1 dg/min and greater than or equal to 0.25 dg/min and exhibits a V0.1/V100 of greater than or equal to 9; and wherein the first and second polyethylene components are produced in continuous dual solution polymerization reactors, wherein the second polyethylene component is produced in the presence of the first polyethylene component and wherein a Ziegler-Natta catalyst is present in each of the first and second polymerization reactors is provided. Also provided are methods for producing the polyethylene resin and films made therefrom.

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23-03-2017 дата публикации

ETHYLENE-BASED POLYMER COMPOSITION FOR FILMS WITH IMPROVED TOUGHNESS

Номер: US20170081444A1
Принадлежит:

The invention provides a composition comprising a first composition, comprising at least one ethylene-based polymer, and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio I10/I2 that meets the following equation: I10/I2≧7.0−1.2×log (I2). The invention also provides a process to form a composition comprising at least two ethylene-based polymers, said process comprising the following: polymerizing ethylene, and optionally at least one comonomer, in solution, in the presence of a catalyst system comprising a metal-ligand complex of Structure I, as described herein, to form a first ethylene-based polymer; and polymerizing ethylene, and optionally at least one comonomer, in the presence of a catalyst system comprising a Ziegler/Natta catalyst, to form a second ethylene-based polymer. 1. A composition comprising a first composition , comprising at least one ethylene-based polymer , and wherein the first composition comprises a MWCDI value greater than 0.9 , and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log (I2).2. The composition of claim 1 , wherein the first composition has a MWCDI value less than claim 1 , or equal to claim 1 , 10.0.3. The composition of claim 1 , wherein the ethylene-based polymer is an ethylene/α-olefin interpolymer.4. The composition of claim 1 , wherein the first composition further comprises a second ethylene-based polymer.5. The composition of claim 4 , wherein the second ethylene-based polymer is an ethylene/α-olefin interpolymer.6. The composition of claim 1 , wherein the first composition has a ZSVR value from 1.2 to 3.0.7. The composition of claim 1 , wherein the first composition has a melt index ratio I10/I2 less than claim 1 , or equal to claim 1 , 9.2.8. The composition of claim 1 , wherein the first composition has a vinyl unsaturation level greater than 10 vinyls per 1 claim 1 ,000 claim 1 ,000 total carbons.9. The composition of claim 1 , wherein the ...

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10-04-2013 дата публикации

Ethylene-based polymer compositions

Номер: CN103038281A
Принадлежит:

An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions are useful for making many articles, especially including films. The polymers are made using a metal complex of a polyvalent aryloxyether.

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28-11-2017 дата публикации

Low haze polyethylene polymer compositions

Номер: US0009828495B2

Embodiments of a polyethylene polymer blend having a melt index (I2)<2 g/10 min are provided, wherein the polyethylene polymer blend comprises at least about 50% by wt. of at least one high density polyethylene resin (HDPE) having a density ≧0.950 g/cm3, a melt index (I2)<4 g/10 min; a melt flow ratio (I10/I2)≦9, and a molecular weight distribution (MWD) of about 2 to about 5; and further comprises about 1% to about 20% by wt. of at least one low density polyethylene resin (LDPE) having a density ≦0.930 g/cm3, a melt index (I2) of about 0.1 to about 10 g/min, and an MWD>3.

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26-09-2012 дата публикации

Polymers comprising units derived from ethylene and polyalkene

Номер: CN102695734A
Принадлежит:

A polymer comprises units derived from ethylene and polyalkylene, the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13C Nuclear Magnetic Resonance (NMR).

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06-03-2018 дата публикации

Process to produce enhanced melt strength ethylene/alpha-olefin copolymers and articles thereof

Номер: US0009908956B2

An ethylene/α-olefin copolymer comprising units derived from ethylene; and units derived from at least one α-olefin; wherein the ethylene/α-olefin copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/α-olefin copolymer is provided. Also provided is a process for producing an ethylene/α-olefin copolymer comprising: (1) polymerizing ethylene and one or more α-olefins in a polymerization reactor; (2) thereby producing an enhanced melt strength ethylene/α-olefin copolymer having from 300 to 500 vinyl unsaturation units per 1,000,000 carbon atoms, a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5.

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27-03-2018 дата публикации

Polyethylene blend-composition suitable for blown films, and films made therefrom

Номер: US9926441B2

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films according to the present invention comprises the melt blending product of: (a) from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm3, and a melt index (I2) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (Mw/Mn) in the range of from 6 to 10; (b) 90 percent or greater by weight of a linear low density polyethylene composition has a density in the range of 0.900 to 0.935 g/cm3, a molecular weight distribution (Mw/Mn) in the range of 1.5 to 4.5, a melt index (I2) in the range of 0.1 to 5 g/10 minutes, a molecular weight distribution (Mz/Mw) in the range of less than 3, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of said composition, ...

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09-03-2017 дата публикации

POLYMERIZATION PROCESS FOR PRODUCING ETHYLENE BASED POLYMERS

Номер: US20170066858A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polymerization process for producing ethylene based polymers. In one embodiment, the instant invention provides a polymerization process for producing ethylene based polymers comprising: polymerizing ethylene with optionally one or more α-olefins in the presence of one or more first catalyst systems and optionally one or more second catalyst systems in in a dual reator system or a multiple reactor system, wherein first catalyst system comprises; (a) one ore more procatalysts comprising a metal-ligand complex of formula (I):

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10-08-2017 дата публикации

ARTIFICIAL TURF FILAMENT AND ARTICLES INCORPORATING SAME

Номер: US20170226332A1
Принадлежит: Dow Global Technologies LLC

Artificial turf filaments formed from polyethylene are provided that can have desirable properties. In one aspect, an artificial turf filament comprises a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log (I2). 1. An artificial turf filament comprising a first composition , wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9 , and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log (I2).2. The artificial turf filament of claim 1 , wherein the first composition has a MWCDI value less than claim 1 , or equal to claim 1 , 10.0.3. The artificial turf filament of claim 1 , wherein the first composition has a density of 0.905 to 0.940 g/cmand a melt index (I2) of 0.5 to 5 g/10 minutes.4. The artificial turf filament of claim 1 , wherein the filament exhibits a shrink of less than 6%.5. The artificial turf filament of claim 1 , wherein the filament exhibits an elongation of 40% or more.6. A method of manufacturing an artificial turf filament claim 1 , the method comprising:providing a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log (I2); andextruding the first composition into an artificial turf filament.7. The method of claim 6 , wherein the method further comprises stretching the artificial turf filament to a predetermined stretch ratio.8. The method of claim 7 , wherein the stretch ratio is at least 4.10. The artificial turf of claim 9 , wherein the artificial turf further comprises a secondary backing bonded ...

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31-10-2012 дата публикации

Polymerization process to make low density polyethylene

Номер: CN102762609A
Принадлежит:

A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; and with the proviso that the ratio of Z1/Z2 is less than 1.

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25-12-2013 дата публикации

Process to produce enhanced melt strength ethylene/alpha-olefin copolymers and articles thereof

Номер: CN103476810A
Принадлежит:

The invention provides an ethylene/a-olefm copolymer comprising units derived from ethylene; and units derived from at least one a-olefm; wherein the ethylene/a-olefm copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/a-olefm copolymer is provided. Also provided is a process for producing an ethylene/ a-olefm copolymer comprising: (1) polymerizing ethylene and one or more a-olefms in a polymerization reactor; (2) thereby producing an enhanced melt strength ethylene/a-olefm copolymer having from 300 to 500 vinyl unsaturation units per 1,000,000 carbon atoms, a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5.

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20-02-2013 дата публикации

Polyethylene with high melt strength for use in films

Номер: CN102939325A
Принадлежит:

The present invention is a method for producing a film particularly well suited for shrink film applications, said method comprising the steps of selecting a target polyethylene resin and then increasing the melt strength of the polyethylene resin by reacting the polyethylene resin with an alkoxy amine derivative, and then forming a film from the reacted target polyethylene.

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12-01-2017 дата публикации

POLYETHYLENE COMPOSITION AND FILMS MADE THEREFROM

Номер: US20170008985A1
Принадлежит:

A polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I, measured according to ASTM D 1238 (2.16 kg @190° C.), of from 0.9 to 5 g/10 min; density (measured according to ASTM D792) from 0.910 to 0.935 g/cc; a melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg @ 190° C.), of from 6 to 7.4; and molecular weight distribution (M/M) of from 2.5 to 3.5 is provided. 1. A polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization; wherein said polyethylene composition is characterized by one or more of the following properties:{'sub': '2', '(a) a melt index, I, measured according to ASTM D 1238 (2.16 kg @190° C.), of from 0.9 to 5 g/10 min;'}{'sup': '3', '(b) density (measured according to ASTM D792) from 0.910 to 0.935 g/cm;'}{'sub': 10', '2, '(c) a melt flow ratio, I/I, wherein ho is measured according to ASTM D1238 (10 kg @ 190° C.) of from 6 to 7.4; and'}{'sub': w', 'n, '(d) molecular weight distribution (M/M) of from 2.5 to 3.5.'}2. The polyethylene composition according to claim 1 , wherein the solution polymerization occurs in a single reactor.3. The polyethylene composition according to claim 1 , wherein the solution polymerization occurs in a dual reactor system wherein the same polymer is made in each of the dual reactors.4. The polyethylene composition according to claim 1 , wherein when said polyethylene composition is formed into a single layer film having a 0.8 mil thickness according to the method described herein said film is characterized with one or more of the following ...

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03-10-2017 дата публикации

Process for making ethylene-based polymers using hydrocarbon initiators

Номер: US0009777083B2

An ethylene-based polymer, e.g., LDPE, with a low dissipation factor is made by a process comprising the step of contacting at polymerization conditions ethylene and, optionally, one or more comonomers, e.g., an alpha-olefin, with at least one carbon-carbon (C—C) hydrocarbyl, free-radical initiator of Structure 1: wherein R1, R2, R3, R4, R5 and R6, are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R1, R2, R3, R4, R5 and R6) form a ring structure, with the provisos that at least one of R2 and R5, and at least one of R3 and R6 is a hydrocarbyl group of at least two carbon atoms, e.g., an alkaryl of at least seven carbon atoms.

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08-08-2017 дата публикации

Multi-metallic Ziegler-Natta procatalysts and catalysts prepared therefrom for olefin polymerizations

Номер: US0009725535B2

Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties.

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21-11-2012 дата публикации

New bicomponent fiber

Номер: CN102791913A
Принадлежит:

The present invention relates to a new bicomponent fiber, a nonwoven fabric comprising said new bicomponent fiber and sanitary articles made therefrom. The bicomponent fiber contains a polyethylene-based resin forming at least part of the surface of the fiber longitudinally continuously and is characterized by a Co-monomer Distribution Constant greater than about 45, a recrystallization temperature between 85 DEG C and 110 DEG C, a tan delta value at 0.1 rad/sec from about 15 to 50, and a complex viscosity at 0.1 rad/second of 1400 Pa.sec or less. The nonwoven fabric comprising the new bicomponent fiber according to the instant invention are not only excellent in softness, but also high in strength, and can be produced in commercial volumes at lower costs due to higher throughputs and requiring less energy.

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03-10-2012 дата публикации

A sealant composition, method of producing the same

Номер: CN102712794A
Принадлежит:

The instant invention is a sealant composition, method of producing the same, articles made therefrom, and method for forming such articles. The sealant composition according to the present invention comprises: (a) from 70 to 99.5 percent by weight of an ethylene/alpha-olefin interpolymer composition, based on the total weight of the sealant composition, wherein said ethylene/alpha-olefin interpolymer composition comprises an ethylene/a-olefin interpolymer, wherein ethylene/alpha-olefin interpolymer has a Comonomer Distribution Constant (CDC) in the range of from 15 to 250, and a density in the range of from 0.875 to 0.963 g/cm3, a melt index (I2) in a range of from 0.2 to 20 g/ 10 minutes, and long chain branching frequency in the range of from 0.02 to 3 long chain branches (LCB) per 1000C; (b) from 0.5 to 30 percent by weight of a propylene/alpha-olefin interpolymer composition, wherein said propylene/alpha-olefin interpolymer composition comprises a propylene/alpha-olefin copolymer or ...

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26-06-2013 дата публикации

Impact modification of thermoplastics with ethylene/alpha-olefin interpolymers

Номер: CN103172961A
Принадлежит:

The invention relates to impact modification of thermoplastics with ethylene/alpha-olefin interpolymers. Compositions having good impact performance can be made from a thermoplastic (e.g., a polyolefin such as polypropylene or HDPE) and an ethylene multi-block copolymer. The compositions are easily molded and often have particular utility in making, for example, automotive facia, parts and other household articles.

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05-12-2017 дата публикации

Sealant composition

Номер: US0009834712B2

The instant invention provides a polyolefin composition suitable for sealant applications, sealant compositions, method of producing the same, and films and multilayer structures made therefrom. The polyolefin composition suitable for sealant applications according to the present invention comprises: an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 110, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range of from 1.01 to 2.0; a density in the range of from 0.908 to 0.922 g/cm3, a melt index (I2 at 190° C./2.16 kg) in the range of from 0.5 to 5.0 g/10 minutes, a molecular weight distribution (defined as the weight average molecular weight divided by the number average molecular weight, Mw/Mn) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second, determined at 190° C., in ...

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02-10-2013 дата публикации

Processes to prepare ethylene-based polymer compositions

Номер: CN103339186A
Принадлежит:

The invention provides a process to form an ethylene-based polymer composition, the process comprising at least the following: Step 1 : polymerizing a first ethylene-based polymer in the presence of at least one molecular catalyst and a hydrocarbon chain transfer agent, and at a polymerization pressure of at least 14,000 psi; Step 2: polymerizing a second ethylene-based polymer.

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05-09-2017 дата публикации

Ethylene/alpha-olefin interpolymer composition

Номер: US0009752021B2

The instant invention provides an ethylene/alpha-olefin interpolymer composition suitable for blown film applications, and blown films made therefrom. The ethylene/alpha-olefin interpolymer composition suitable for blown film applications according to the present invention comprises greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.910 to 0.918 g/cm3, a melt index I2 in the range of from 0.5 to 1.1 g/10 minutes, a melt flow ratio I10/I2 in the range of from 8 to 10, a melt strength in the range of from 3 to 6 cN, a highest temperature fraction in the range of from 11 to 14 percent determined by CEF, a highest peak temperature fraction by CEF in range of from 96 to 100° C., and a lowest temperature fraction from CEF in the range of from 2 to 5 percent, and a DSC heat curve having three melting peaks ...

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01-06-2017 дата публикации

BREATHABLE FILMS AND ARTICLES INCORPORATING SAME

Номер: US20170152377A1
Принадлежит:

Breathable films formed from polyethylene are provided that can have desirable properties. In one aspect, a breathable film comprises a layer formed from a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log(I2). 1. A breathable film comprising a first composition , wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9 , and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log(I2).2. The breathable film of claim 1 , wherein the breathable film further comprises 40 to 65 weight percent of a mineral filler.3. The breathable film of claim 1 , wherein the first composition has a MWCDI value less than claim 1 , or equal to claim 1 , 10.0.4. The breathable film of claim 1 , wherein the first composition has a density of 0.910 to 0.940 g/cmand a melt index (I2) of 0.5 to 30 g/10 minutes.5. The breathable film of claim 1 , wherein the film has a basis weight of 10 to 20 g/m.6. The breathable film of claim 1 , further comprising a second polymer claim 1 , and wherein the second polymer is selected from the following: a LLDPE claim 1 , a VLDPE claim 1 , a LDPE claim 1 , a MDPE claim 1 , a HDPE claim 1 , a HMWHDPE claim 1 , a propylene-based polymer claim 1 , a polyolefin plastomer claim 1 , a polyolefin elastomer claim 1 , an olefin block copolymer claim 1 , an ethylene vinyl acetate claim 1 , an ethylene acrylic acid claim 1 , an ethylene methacrylic acid claim 1 , an ethylene methyl acrylate claim 1 , an ethylene ethyl acrylate claim 1 , an ethylene butyl acrylate claim 1 , a polyisobutylene claim 1 , a maleic anhydride-grafted polyolefin claim 1 , an ionomer of any of the foregoing claim 1 , or a combination thereof.7. The ...

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16-03-2017 дата публикации

Process for Making Ethylene-Based Polymers Using Hydrocarbon Initiators

Номер: US20170073439A1
Принадлежит:

An ethylene-based polymer, e.g., LDPE, with a low dissipation factor is made by a process comprising the step of contacting at polymerization conditions ethylene and, optionally, one or more comonomers, e.g., an alpha-olefin, with at least one carbon-carbon (C—C) hydrocarbyl, free-radical initiator of Structure 1: wherein R, R, R, R, Rand R, are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R, R, R, R, Rand R) form a ring structure, with the provisos that at least one of Rand R, and at least one of Rand Ris a hydrocarbyl group of at least two carbon atoms, e.g., an alkaryl of at least seven carbon atoms. 2. The process of in which the C—C hydrocarbyl claim 1 , free-radical initiator of Structure I is present in an amount greater than claim 1 , or equal to claim 1 , 0.001 grams per kilogram (g/kg) of the ethylene fed to the polymerization reaction.5. The process of in which the C—C hydrocarbyl claim 1 , free-radical initiator has a decomposition temperature of greater than or equal to (≧) 125° C. based on a DSC measurement.6. The process of in which two or more C—C hydrocarbyl claim 1 , free-radical initiators of Structure I are contacted with ethylene and claim 1 , optionally claim 1 , one or more alpha-olefin comonomers.7. An ethylene-based polymer made by the process of .8. An ethylene-based polymer having at least one of the following properties: (1) a carbonyl ratio of less than (<) 0.02 and (2) a dissipation factor less than or equal to (≦) 1.55×10radian at 2.47 GHz.9. The ethylene-based polymer of in which the polymer is a low density polyethylene (LDPE).11. The process of in which a comonomer is present and the comonomer is at least one of an alpha-olefin claim 10 , an acrylate or a methacrylate.13. The process of in which the ethylene and claim 11 , optionally claim 11 , one or more comonomers claim 11 , are contacted with at least one carbon-carbon (C—C) hydrocarbyl claim 11 , free-radical initiator in ...

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29-01-2014 дата публикации

Multi -metallic Ziegler - Natta procatalysts and catalysts prepared therefrom for olefin polymerizations

Номер: CN103547601A
Принадлежит:

Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties.

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06-02-2018 дата публикации

Ethylene/alpha-olefin interpolymer composition

Номер: US0009884929B2

An ethylene/alpha-olefin interpolymer composition suitable for pipe applications prepared via solution polymerization process, and pipes made therefrom. The ethylene/alpha-olefin interpolymer composition suitable for pipe applications according to the present invention comprises greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.925 to 0.935 g/cm3, a melt index I2 in the range of from 0.3 to 1.0 g/10 minutes, a melt flow ratio I10/I2 in the range of from 7.9 to 11, a melt strength in the range of from 3 to 10 cN, a DSC heat curve having a melting peak temperature in the range of from 120 to 130° C., a crystallinity in the range of from 50 to 70 percent, a 1% flexural modulus in the range from 350 to 600 MPa, and a zero shear viscosity ratio (ZSVR) in the range of from 2 to 10.

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09-03-2017 дата публикации

POLYMERIZATION PROCESS FOR PRODUCING ETHYLENE BASED POLYMERS

Номер: US20170066859A1
Принадлежит:

The instant invention provides a polymerization process for producing ethylene based polymers. 2. (canceled) The present application claims the benefit of U.S. Provisional Application No. 61/746,242, filed on Dec. 27, 2012.The instant invention relates to a polymerization process for producing ethylene based polymers.Olefin based polymers such as polyethylene and/or polypropylene are produced via various catalyst systems. Selection of such catalyst system used in the polymerisation process of the olefin based polymers is an important factor contributing to the characteristics and properties of such olefin based polymers.Polyethylene is known for use in the manufacture of a wide a variety of articles. The polyethylene polymerization process can be varied in a number of respects to produce a wide variety of resultant polyethylene resins having different physical properties that render the various resins suitable for use in different applications. It is generally known that polyethylene can be produced in solution phase loop reactors in which ethylene monomer, and optionally one or more alpha olefin comonomers, typically having from 3 to 10 carbon atoms, are circulated in the presence of one or more catalyst systems under pressure around a loop reactor by a circulation pump. The ethylene monomers and optional one or more comonomers are present in a liquid diluent, such as an alkane or isoalkane, for example isobutane. Hydrogen may also be added to the reactor. The catalyst systems for producing polyethylene may typically comprise a chromium-based catalyst system, a Ziegler Nana catalyst system, and/or a molecular (either metallocene or non-metallocene) catalyst system. The reactants in the diluent and the catalyst system are circulated at an elevated polymerization temperature around the loop reactor thereby producing polyethylene homopolymer and/or copolymer depending on whether or not one or more comonomers are present. Either periodically or continuously, part of ...

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27-11-2013 дата публикации

Antioxidant compounds for polyolefin resins

Номер: CN103415564A
Принадлежит:

The present invention is a composition suitable for use as an antioxidant for polyolefin resins, said composition having a structure corresponding to the formula: wherein R1, R2, R3, R4, R5 and R6 are selected from a hydrogen or an alkyl group having 1 to 24 carbon atoms, or a branched alkyl group having 1 to 24 carbon atoms, or a cyclic alkyl group with 1 to 24 carbon atoms; wherein said composition has a peak decomposition temperature of less than 280 DEG C and a total decomposition energy which is endothermic or if exothermic, releases no more energy than 40 k Joules/mole.

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02-02-2017 дата публикации

ORIENTED POLYETHYLENE FILMS AND A METHOD FOR MAKING THE SAME

Номер: US20170029583A1
Принадлежит:

A first oriented film comprising a first polyethylene composition which comprises: from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an Ilower than 2 g/10 min; and from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than or equal to 0.925 g/cc and an Igreater than or equal to 2 g/10 min; wherein the first polyethylene composition has an 12 from 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc is provided. 1. A first oriented film comprising a first polyethylene composition which comprises:{'sub': '2', 'from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an Ilower than 2 g/10 min; and'}{'sub': '2', 'from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than 0.925 g/cc and an Igreater than 2 g/10 min;'}{'sub': '2', 'wherein the first polyethylene composition has an Ifrom 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc.'}2. The first oriented film according to claim 1 , wherein the first and/or second linear low density polyethylene polymer is produced using a Ziegler-Natta catalyst.3. The first oriented film according to claim 1 , wherein the first linear low density polyethylene polymer has a density greater than 0.930 g/cc and an Ilower than 1 g/10 min.4. The first oriented film according to claim 1 , wherein the second linear low density polyethylene polymer has a density lower than 0.920 g/cc and an Igreater than 4 g/10 min.5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. The first oriented film according to claim 1 , wherein the first polyethylene composition has an MWgreater than 135 kg/mol and Igreater than 42 kg/mol.12. (canceled)13. (canceled)14. The first oriented film according to claim 1 , wherein the first oriented film is oriented below the melting point of the first polyethylenecomposition.15. ( ...

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11-07-2012 дата публикации

Ethylene-based polymer compositions

Номер: CN102575071A
Принадлежит:

An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions are useful for making many articles, especially including films. The polymers are made using a metal complex of a polyvalent aryloxyether.

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26-09-2012 дата публикации

Polymers comprising units derived from ethylene and siloxane

Номер: CN102695735A
Принадлежит:

The invention provides a polymer comprising units derived from ethylene and siloxane, polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13C Nuclear Magnetic Resonance (NMR).

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23-08-2016 дата публикации

Polyethylene with high melt strength for use in films

Номер: US0009422425B2

The present invention is a method for producing a film particularly well suited for shrink film applications, said method comprising the steps of selecting a target polyethylene resin and then increasing the melt strength of the polyethylene resin by reacting the polyethylene resin with an alkoxy amine derivative, and then forming a film from the reacted target polyethylene.

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13-04-2017 дата публикации

POLYMERIZATIONS FOR OLEFIN-BASED POLYMERS

Номер: US20170101494A1
Принадлежит: Dow Global Technologies LLC

The invention provides a process to form an olefin-based polymer, said process comprising polymerizing at least one olefin in the presence of at least one catalyst system comprising the reaction product of the following: A) at least one cocatalyst; and B) a procatalyst comprising a metal-ligand complex of Formula (I), as described herein: (Formula I). 2. The process of claim 1 , wherein for Formula I claim 1 , wherein when Ris a hydrogen atom claim 1 , then Ris a substituted or unsubstituted (C-C)hydrocarbyl claim 1 , a substituted or unsubstituted (C-C)heterohydrocarbyl claim 1 , —Si(R) claim 1 , —Ge(R) claim 1 , —P(R) claim 1 , —N(R) claim 1 , —OR claim 1 , —SR claim 1 , —NO claim 1 , —CN claim 1 , —CF claim 1 , —S(O)R claim 1 , —S(O)R claim 1 , —N═C(R) claim 1 , —OC(O)R claim 1 , —C(O)OR claim 1 , —N(R)C(O)R claim 1 , —C(O)N(R) claim 1 , or a halogen atom; and wherein each Ris independently a substituted or unsubstituted (C-C)hydrocarbyl claim 1 , or a substituted or unsubstituted (C-C) heterohydrocarbyl; or{'sup': 18', '17', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C, 'sub': 1', '40', '1', '40', '3', '3', '2', '2', '2', '3', '2', '2', '2', '1', '30', '1', '30, 'wherein, when Ris a hydrogen atom, then Ris a substituted or unsubstituted (C-C)hydrocarbyl, a substituted or unsubstituted (C-C)heterohydrocarbyl, —Si(R), —Ge(R), —P(R), —N(R), —ORS, —SRS, —NO, —CN, —CF, —S(O)R, —S(O)R, —N═C(R), —OC(O)R, —C(O)OR, —N(R)C(O)R, —C(O)N(R), or a halogen atom; and wherein each Ris independently a substituted or unsubstituted (C-C)hydrocarbyl, or a substituted or unsubstituted (C-C) heterohydrocarbyl; and/or'}{'sup': 19', '20', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C', 'C, 'sub': 1', '40', '1', '40', '3', '3', '2', '2', '2', '3', '2', '2', '2', '1', '30', '1', '30, 'wherein, when Ris a hydrogen atom, then Ris a substituted or unsubstituted (C-C)hydrocarbyl, a substituted or unsubstituted (C-C)heterohydrocarbyl, —Si(R), —Ge(R), —P(R), —N(R), —ORS, — ...

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11-05-2017 дата публикации

CAST FILMS WITH IMPROVED TOUGHNESS

Номер: US20170129230A1
Принадлежит: Dow Global Technologies LLC

Cast films formed from polyethylene are provided that can have desirable properties. In one aspect, a cast film comprises a layer formed from a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log (I2). 1. A cast film comprising a layer formed from a composition comprising a first composition , wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9 , and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log (I2).2. The cast film of claim 1 , wherein the first composition has a MWCDI value less than claim 1 , or equal to claim 1 , 10.0.3. The cast film of claim 1 , wherein the first composition has a ZSVR value from 1.2 to 3.0.4. The cast film of claim 1 , wherein the first composition has a melt index ratio I10/I2 less than claim 1 , or equal to claim 1 , 9.2.5. The cast film of claim 1 , wherein the first composition has a vinyl unsaturation level greater than 10 vinyls per 1 claim 1 ,000 claim 1 ,000 total carbons.6. The cast film of claim 1 , wherein the layer further comprises a second polymer and the second polymer is selected from the following: a LLDPE claim 1 , a VLDPE claim 1 , a LDPE claim 1 , a MDPE claim 1 , a HDPE claim 1 , a HMWHDPE claim 1 , a propylene-based polymer claim 1 , a polyolefin plastomer claim 1 , a polyolefin elastomer claim 1 , an olefin block copolymer claim 1 , an ethylene vinyl acetate claim 1 , an ethylene acrylic acid claim 1 , an ethylene methacrylic acid claim 1 , an ethylene methyl acrylate claim 1 , an ethylene ethyl acrylate claim 1 , an ethylene butyl acrylate claim 1 , a polyisobutylene claim 1 , a maleic anhydride-grafted polyolefin claim 1 , an ionomer of any of the foregoing ...

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26-01-2017 дата публикации

SHRINK FILMS WITH HIGH TEAR RESISTANCE, AND METHODS OF MAKING THEREOF

Номер: US20170021599A1
Принадлежит:

A multilayer ethylene-based shrink films comprising a core layer comprising a polyethylene resin,and two skin layers, wherein the core layer is positioned between the two skin layers,wherein the polyethylene resin comprises greater than 50 mol. % of the units derived from ethylene and less than 30 mol. % of the units derived from one or more alpha-olefin comonomers, has greater than 50% of the copolymer fraction eluting between 75.0° C. and 95.0° C. as determined by Crystallization Elution Fractionation (CEF), and has a density ranging from 0.915 to 0.940 g/cc, and wherein the film is biaxially-oriented. 1. A multilayer ethylene-based shrink film comprising:a core layer comprising a polyethylene resin; andtwo skin layers;wherein the core layer is positioned between the two skin layers; and comprises greater than 50 mol. % of the units derived from ethylene and less than 30 mol. % of the units derived from one or more alpha-olefin comonomers;', 'has greater than 50% of the copolymer fraction eluting between 75.0° C. and 95.0° C. as determined by Crystallization Elution Fractionation (CEF); and', 'has a density ranging from 0.915 to 0.940 g/cc; and, 'wherein the polyethylene resinwherein the film is biaxially-oriented.2. An ethylene-based shrink film comprising a polyethylene resin , wherein the polyethylene resin:comprises greater than 50 mol. % of the units derived from ethylene and less than 30 mol. % of the units derived from one or more alpha-olefin comonomers;has greater than 50% of the copolymer fraction eluting between 75.0° C. and 95.0° C. as determined by Crystallization Elution Fractionation (CEF); andhas a density ranging from 0.915 to 0.940 g/cc; andwherein the film is biaxially-oriented.3. The film of claim 1 , wherein the polyethylene resin in the core layer has a melt index from 0.1 to 5 g/10 min.4. The film of claim 1 , wherein the core layer is a blend that further comprises one or more additional polyethylene resins claim 1 , wherein the blend has a ...

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30-08-2016 дата публикации

Ethylene-based polymers and processes to make the same

Номер: US0009428595B2

The invention provides a process to form an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one free-radical agent, and in the presence of a “metal alkyl-containing compound” selected from the group consisting of the following: i) at least one “Group II metal alkyl-containing compound,” ii) at least one “Group III metal alkyl-containing compound,” or iii) a combination of i) and ii). The invention also provides a composition comprising at least one ethylene-based polymer, prepared from a free-radical polymerization, and wherein the ethylene-based polymer has the following property: y>0.28567x−0.00032, wherein y=vinyl/1000C, as determined by 1H NMR, and x=mol % polymerized α-olefin, as determined by 13C NMR.

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28-11-2017 дата публикации

Linear low density polyethylene composition suitable for cast film

Номер: US0009828476B2

The instant invention provides a linear low density polyethylene composition suitable for cast film, films made therefrom, and packaging devices comprising one or more such film layers. The linear low density polyethylene composition suitable for cast film according to the present invention comprises an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 200, for example from 40 to 150, a vinyl unsaturation of less than 0.12 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1.2 to 5, for example from 1.5 to 4; a density in the range of from 0.910 to 0.935, for example from 0.915 to 0.925, g/cm3, a melt index (I2) in a range of from 1 to 10, for example from 2 to 6 g/10 minutes, a molecular weight distribution (Mw/Mn) in the range of from 2 to 3.5.

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31-07-2013 дата публикации

An ethylene/alpha-lefin interpolymer suitable for use in shrinkage film applications, and articles made therefrom

Номер: CN103228685A
Принадлежит:

The instant invention provides an ethylene/alpha-olefin interpolymer suitable for use in shrinkage film applications, and articles made therefrom. The ethylene/alpha-olefin interpolymer according to the present invention has a CDBI of less than 60%, and comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer, eluting from 85 DEG C to 90 DEG C and from 90 DEG C to 95 DEG C, comprising a weight fraction ratio of > 0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95 DEG C and 100 DEG C and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95 DEG C and 100 DEG C, and wherein the ethylene/alpha-olefin interpolymer has a density in the range of 0.920 ...

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18-08-2016 дата публикации

A Process for Increasing the Melt Strength of a Polyethylene Resin, a Masterbatch Composition and a Polymeric Composition

Номер: US20160237222A1
Принадлежит:

A process for increasing the melt strength of a polyethylene resin comprising a) selecting a polyethylene resin having i) a density, as determined according to ASTM D792, in the range of from 0.865 g/cmto 0.97 g/cm, and ii) a melt index, I, as determined according to ASTM D1238 (2.16 kg, 190° C.), in the range of from 0.01 g/10 min to 100 g/10 min; b) reacting from 10 ppm to 1000 ppm of at least one peroxide having a 1 hour half-life decomposition temperature from 160° C. to 250° C. with the polyethylene resin under conditions sufficient to increase the melt strength of the polyethylene resin is provided. Also provided are a masterbatch composition and a polymeric composition. 1. A method for increasing the melt strength of a polyethylene resin comprising: [{'sup': 3', '3, 'i) a density, as determined according to ASTM D792, in the range of from 0.865 g/cmto 0.97 g/cm, and'}, {'sub': '2', 'ii) a melt index, I, as determined according to ASTM D1238 (2.16 kg, 190° C.), in the range of from 0.01 g/10 min to 100 g/10 min;'}], 'a) selecting a polyethylene resin having'}b) reacting from 10 ppm to 1000 ppm of at least one peroxide having a 1 hour half-life decomposition temperature from 160° C. to 250° C. with the polyethylene resinwherein the peroxide is added to the polyethylene resin as a masterbatch comprising the peroxide along with a carrier resin, and wherein the carrier resin is selected from polyethylenes having a vinyl concentration from 0.07 to 0.7 per 1,000 carbons in the backbone of the polymer.2. (canceled)3. (canceled)4. The method according to claim 1 , wherein the ratio of Iof the polyethylene resin to the Iof the carrier resin is from 0.2 to 5 g/10 min.5. The method according to claim 1 , wherein the peroxide is present in amounts from 10 to 300 ppm.6. (canceled)7. A polymeric composition comprising:from 1 to 30 wt % of a masterbatch comprising a carrier resin and from 1000 ppm to 10000 ppm of at least one peroxide having a 1 hr. half-life decomposition ...

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25-04-2017 дата публикации

Polyolefin composition

Номер: US0009631059B2

The instant invention provides a polyolefin composition suitable for packaging applications, films, multilayer structures and packaging devices made therefrom. The polyolefin composition according to the present invention comprises: an ethylene/α-olefin interpolymer composition comprising (a) from 50 to 75 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.908 g/cm3, a melt index (I2) in the range of from 0.2 to 1 g/10 minutes, and (b) from 25 to 50 percent by weight of a second ethylene/α-olefin copolymer fraction, and wherein said ethylene/α-olefin interpolymer composition has a density in the range of 0.910 to 0.924 g/cm3, a melt index (I2) in the range of from 0.5 to 2 g/10 minutes, a zero shear viscosity ratio (ZSVR) in the range of from 1.15 to 2.5, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (Mw/Mn) in the range of from 2.0 to 4.0, and tan ...

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02-08-2016 дата публикации

Polymerization process to make low density polyethylene

Номер: US0009403928B2

A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; and with the proviso that the ratio of Z1/Z2 is less than 1.

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18-07-2012 дата публикации

Polymers comprising units derived from ethylene and poly(alkoxide)

Номер: CN102597029A
Принадлежит:

A polymer comprises units derived from ethylene and poly(alkoxide) the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13C Nuclear Magnetic Resonance (NMR).

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03-10-2012 дата публикации

Extrusion coating composition

Номер: CN102712793A
Принадлежит:

Multimodal polyethylene compositions are provided. Extrusion compositions including the multimodal polyethylene are provided. The extrusion composition further include a high pressure low density polyethylene and optionally other additives and/or polyethylenes. Extruded articles made from the polyethylene extrusion compositions are also provided.

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04-09-2013 дата публикации

Ethylene-based polymers and processes for the same

Номер: CN103282391A
Принадлежит:

The invention provides an ethylene-based polymer formed from at least the following: ethylene and a ''monomeric chain transfer agent (monomeric CTA)'', comprising a ''copolymerization end'' and a ''chain transfer end''.

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13-04-2017 дата публикации

ETHYLENE-BASED POLYMERS

Номер: US20170101495A1
Принадлежит: Dow Global Technologies LLC

The invention provides an ethylene-based polymer comprising the following properties: a) a ZSVR value from 1.2 to 2.6, b) a MWD from 1.5 to 2.8, and c) a tan delta (0.1 rad/s; 190 C) from 5.0 to 50.

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30-08-2016 дата публикации

Process to produce enhanced melt strength ethylene/α-olefin copolymers and articles thereof

Номер: US0009428636B2

An ethylene/α-olefin copolymer comprising units derived from ethylene; and units derived from at least one α-olefin; wherein the ethylene/α-olefin copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/α-olefin copolymer is provided. Also provided is a process for producing an ethylene/α-olefin copolymer comprising: (1) polymerizing ethylene and one or more α-olefins in a polymerization reactor; (2) thereby producing an enhanced melt strength ethylene/α-olefin copolymer having from 300 to 500 vinyl unsaturation units per 1,000,000 carbon atoms, a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5.

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19-06-2013 дата публикации

Ethylene-based polymer compositions for use as a blend component in shrinkage film applications

Номер: CN103168072A
Принадлежит:

An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions and blends thereof with one or more polymers, such as LDPE, are useful for making many articles, especially including films.

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31-07-2013 дата публикации

An ethylene/alpha-lefin interpolymer suitable for use in fiber applications, and fibers made therefrom

Номер: CN103228684A
Принадлежит:

The instant invention provides an ethylene/alpha-olefin interpolymer suitable for use in fiber applications, and fibers made therefrom. The ethylene/alpha-olefin interpolymer according to the present invention has a CDBI of less than 60%, and comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer, eluting from 85 DEG C to 90 DEG C and from 90 DEG C to 95 DEG C, comprising a weight fraction ratio of > 0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95 DEG C and 100 DEG C and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95 DEG C and 100 DEG C, and wherein the ethylene/alpha-olefin interpolymer has a density in the range of from 0.920 to ...

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15-11-2016 дата публикации

Resin compositions for extrusion coating

Номер: US0009493641B2

This invention pertains to polyethylene extrusion compositions. In particular, the invention pertains to ethylene polymer extrusion compositions having high drawdown and substantially reduced neck-in. The compositions comprise from 40 to 90% by weight of the composition of a first polyethylene composition, said first polyethylene composition comprising a linear low density polyethylene having a density in the range of from 0.90 to 0.96 g/cm3, and a melt index (I2) of from 5 to 15 g/10 min; and from 1 to 10% by weight of the composition of a second polyethylene composition, said second polyethylene composition comprising a high pressure low density polyethylene having a density in the range of from 0.915 to 0.930 g/cm3, and a melt index of from 0.1 to 3 g/10 min; and from 10 to 50% by weight of the composition of a third polyethylene composition, said third polyethylene composition comprising a high pressure low density polyethylene having a density in the range of from 0.915 to 0.930 g/ ...

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10-11-2016 дата публикации

PROCESS TO PRODUCE ENHANCED MELT STRENGTH ETHYLENE/ALPHA-OLEFIN COPOLYMERS AND ARTICLES THEREOF

Номер: US20160326283A1
Принадлежит:

An ethylene/α-olefin copolymer comprising units derived from ethylene; and units derived from at least one α-olefin; wherein the ethylene/α-olefin copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/α-olefin copolymer is provided. Also provided is a process for producing an ethylene/α-olefin copolymer comprising: (1) polymerizing ethylene and one or more α-olefins in a polymerization reactor; (2) thereby producing an enhanced melt strength ethylene/α-olefin copolymer having from 300 to 500 vinyl unsaturation units per 1,000,000 carbon atoms, a density in the range of from 0.90 to 0.94 g/cc; a melt index (I2) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5.

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27-03-2013 дата публикации

A composition suitable for stretch hood, method of producing the same, and articles made therefrom

Номер: CN103003068A
Принадлежит:

The instant invention provides a composition suitable for stretch hood, method of producing the same, and articles made therefrom. The multi-layer film according to the present invention has a thickness of at least 3 mils comprising at least one inner layer and two exterior layers, wherein the inner layer comprises at least 50 weight percent polyethylene copolymer having a melt index less than 2 grams/10 minutes, a density less than or equal to 0.910 g/cm3, a total heat of fusion less than 120 Joules/gram and a heat of fusion above 115 DEG C of less than 5 Joules/gram, the total heat of fusion of the inner layer less than the heat of fusion of either of the two exterior layers, and wherein the multi-layer film has an elastic recovery of at least 40% when stretched to 100% elongation.

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03-04-2013 дата публикации

Long chain branched (LCB), block, or interconnected copolymers of ethylene in combination with one other polymer

Номер: CN103012684A
Принадлежит:

An ethylenic polymer comprising amyl groups from about 0.1 to about 2.0 units per 1000 carbon atoms as determined by Nuclear Magnetic Resonance and both a peak melting temperature, Tm, in DEG C, and a heat of fusion, Hf, in J/g, as determined by DSC Crystallinity, where the numerical values of Tm and Hf correspond to the relationship Tm >= (0.2143*Hf) + 79.643. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 95 DEG C or greater using a Preparative Temperature Rising Elution Fractionation method, where at least one preparative TREF fraction that elutes at 95 DEG C or greater has a gpcBR value greater than 0.05 and less than 5 as determined by gpcBR Branching Index by 3D-GPC, and where at least 5 % of the ethylenic polymer elutes at a temperature of 95 DEG C or greater based upon the total weight of the ethylenic polymer.

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02-02-2012 дата публикации

COLLATION SHRINKAGE FILM HAVING EXCELLENT CLARITY AND SUPERIOR TOUGHNESS

Номер: US20120028065A1
Принадлежит: Dow Global Technologies LLC

A multilayer film structure comprising at least three layers, wherein at least one layer comprises ethylene and at least one alpha-olefin is claimed, wherein the ethylene interpolymer is characterized as having an average Mand a valley temperature between the interpolymer and high crystalline fraction, T, such that the average Mfor a fraction above Tfrom ATREF divided by average Mof the whole polymer from ATREF (M/M) is less then about 1.95 and wherein the interpolymer has a CDBI of less than 60%. The interpolymer of ethylene and at least one alpha-olefin can also be characterized as having a high density (HD) fraction and an overall density such that % HD fraction<0.0168x−29.636x+13036 where x is the density in grams/cubic centimeter. 1. A multilayer film structure comprising at least three layers , wherein at least one layer comprises an interpolymer of ethylene and at least one alpha-olefin , characterized wherein the interpolymer has an average Mand a valley temperature between the interpolymer and high crystalline fraction , T , such that the average Mfor a fraction above Tfrom ATREF divided by average Mof the whole polymer from ATREF (M/M) is less than about 1.95 and wherein the interpolymer has a CDBI of less than 60%.2. The film structure of comprising a core layer and two skin layers claim 1 , wherein the skin layers comprise the interpolymer claim 1 , and wherein the core layer comprises LDPE.3. The film structure of wherein the LDPE has a melt index of less than 1 g/10 minutes.4. The film structure of wherein each skin layer further comprises another thermoplastic polymer.5. The film structure of wherein said interpolymer has a CDBI of less than 55%.6. The film structure of wherein said interpolymer has a M/Mof less than about 1.7.7. A multilayer film structure comprising at least three layers claim 1 , wherein at least one layer comprises ethylene and at least one alpha-olefin wherein the interpolymer is characterized as having a high density (HD) ...

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28-06-2012 дата публикации

Interconnected Copolymers of Ethylene in Combination with one other Polyalkene

Номер: US20120165481A1
Принадлежит: Dow Global Technologies Inc.

A polymer comprises units derived from ethylene and polyalkylene, the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13C Nuclear Magnetic Resonance (NMR). 1. A polymer comprising units derived from ethylene and polyalkylene the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by C Nuclear Magnetic Resonance (NMR).2. The polymer of comprising a portion of the ethylene bonded to one or more carbon atoms of the polyalkylene.3. The polymer of wherein the polymer comprises at least one ethylene-based polymeric branch bonded to a carbon atom of the polyalkylene.4. The polymer of in which the polymer comprises no appreciable methyl branches as determined by C NMR.5. The polymer of in which the polymer comprises no appreciable propyl branches as determined by C NMR.6. The polymer of having a density of at least 0.91 g/cm.7. The polymer of in which less than 70 weight percent of the polyalkylene is extractable by solvent extraction.8. The polymer of having an Iof less than 10.9. The polymer of having a viscosity ratio V 0.1/V 100 of at least 15.10. A composition comprising the polymer of .11. An article comprising at least one component formed from the composition of .12. The article of in the form of a film.13. A process to form a polymer comprising units derived from ethylene and polyalkylene claim 11 , the process comprising:A. Contacting at least one polyalkylene with ethylene in the presence of a free-radical initiator in a first reactor or a first part of a multi-part reactor; andB. Reacting the polyalkylene with additional ethylene in the presence of the free-radical initiator to form an ethylene-based polymeric branch bonded to the polyalkylene in at least one other reactor or a later part of the multi- part reactor.14. The process of in which the ethylene-based polymeric branch is formed by an ethylene monomer bonding with the polyalkylene to form a ethylene- polyalkylene moiety claim 13 ...

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05-07-2012 дата публикации

Interconnected Copolymers Of Ethylene In Combination With At Least One Polysiloxane

Номер: US20120172545A1
Принадлежит: Dow Global Technologies Inc.

The invention provides a polymer comprising units derived from ethylene and siloxane, polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by C Nuclear Magnetic Resonance (NMR). 1. A polymer comprising units derived from ethylene and siloxane , the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by C Nuclear Magnetic Resonance (NMR).2. The polymer of comprising a portion of the ethylene bonded to one or more silicon atoms of the siloxane.3. The polymer of wherein the polymer comprises at least one ethylene-based polymeric branch bonded to a silicon atom of the siloxane.4. The polymer of having a peak melting temperature Tm in ° C. and density in g/cmthat satisfies the mathematical relationship:{'br': None, 'i': 'Tm<', '771.5(° C.·cc/g)(density)−604(° C.).'}5. The polymer of having a density of at least 0.93 g/cm.6. The polymer of in which less than 40 weight percent of the siloxane is extractable by solvent extraction.7. The polymer of having an I/Iratio of least 13.8. The polymer of having an Iof less than 5.9. The polymer of having a heat of fusion (H) in Joules/grams (J/g) and density in g/cmthat satisfies the mathematical relationship:{'br': None, 'i': 'H', 'sub': 'f', 'sup': '2', '<2333 (J·cc/g)×(density)−2009 (J/g).'}10. A composition comprising the polymer of .11. An article comprising at least one component formed from the composition of .12. The article of in the form of a film.13. A process to form a polymer comprising units derived from ethylene and siloxane claim 11 , the process comprising:A. Contacting at least one siloxane with ethylene in the presence of a free-radical initiator in a first reactor or a first part of a multi-part reactor; andB. Reacting the siloxane with additional ethylene in the presence of the free-radical initiator to form an ethylene-based polymeric branch bonded to the siloxane in at least one other reactor or a later part of the multi-part reactor.14. The ...

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13-09-2012 дата публикации

Interpolymers Suitable for Multilayer Films

Номер: US20120231287A1
Принадлежит:

The present invention relates to compositions and processes of making and using interpolymers having a controlled molecular weight distribution. Multilayer films and film layers derived from novel ethylene/α-olefin interpolymers are also disclosed. 1. (canceled)2. An ethylene/α-olefin interpolymer which has(i) a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 17% of the total area under the DSC melting curve from −20° C. to the end of melting;(ii) a density from about 0.875 g/cc to about 0.915 g/cc; and{'sub': 10', '2, '(iii) a I/Ifrom 5.5 to 6.5.'}3. The ethylene/α-olefin interpolymer of having less than 0.01 long chain branches per 1000 carbon atoms.4. The ethylene/α-olefin interpolymer of which has a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 18% of the total area under the DSC melting curve from −20° C. to the end of melting.5. The ethylene/α-olefin interpolymer of which has a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is from at least about 18% to about 35% of the total area under the DSC melting curve from −20° C. to the end of melting.6. The ethylene/α-olefin interpolymer of which has a DSC curve characterized by an area under the DSC curve from the melting peak temperature to the end of melting is at least about 20% of the total area under the DSC melting curve from −20° C. to the end of melting.7. The ethylene/α-olefin interpolymer of which has a density from about 0.895 g/cc to about 0.910 g/cc.8. The ethylene/α-olefin interpolymer of wherein the I/Iis from about 5.6 to about 6.3.9. The ethylene/α-olefin interpolymer of wherein the interpolymer has a molecular weight distribution in the range from about 2.0 to about 3.8.10. The ethylene/α-olefin interpolymer of wherein the interpolymer has a molecular weight distribution in ...

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13-09-2012 дата публикации

Polymers Comprising Units Derived from Ethylene and Poly(Alkoxide)

Номер: US20120232244A1
Принадлежит: Dow Global Technologies LLC

A polymer comprises units derived from ethylene and poly(alkoxide) the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by 13C Nuclear Magnetic Resonance (NMR). 1. A polymer comprising units derived from ethylene and poly(alkoxide) the polymer having at least 0.15 units of amyl groups per 1000 carbon atoms as determined by C Nuclear Magnetic Resonance (NMR).2. The polymer of comprising a portion of the ethylene bonded to one or more backbone carbon atoms of the poly(alkoxide).3. The polymer of wherein the polymer comprises at least one ethylene-based polymeric branch bonded to a backbone carbon atom of the poly(alkoxide).4. The polymer of in which the polymer comprises no appreciable methyl branches as determined by C NMR.5. The polymer of in which the polymer comprises no appreciable propyl branches as determined by C NMR.6. The polymer of having a density of at least 0.92 g/cm.7. The polymer of in which less than 60 weight percent of the poly(alkoxide) is extractable by solvent extraction.8. The polymer of having a peak melting temperature Tm in ° C. and density in g/cmthat satisfies the mathematical relationship:{'br': None, 'Tm<771.5(° C.·cc/g)×(density)−604(° C.).'}9. The polymer of having a heat of fusion (H) in Joules/grams (J/g) and density in g/cmthat satisfies the mathematical relationship:{'br': None, 'sub': 'f', 'sup': '2', 'H<2333(J·cc/g)×(density)−2009(J/g).'}10. A composition comprising the polymer of .11. An article comprising at least one component formed from the composition of .12. The article of in the form of a film.13. A process to form a polymer comprising units derived from ethylene and poly(alkoxide) claim 11 , the process comprising:A. Contacting at least one poly(alkoxide) with ethylene in the presence of a free-radical initiator in a first reactor or a first part of a multi-part reactor; andB. Reacting the poly(alkoxide) with additional ethylene in the presence of the free-radical initiator to form an ...

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04-10-2012 дата публикации

Polymerization Process to Make Low Density Polyethylene

Номер: US20120252990A1
Принадлежит:

A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; and with the proviso that the ratio of Z1/Z2 is less than 1. 1. A high pressure polymerization process to form an ethylene-based polymer , the process comprising the steps of:A. Injecting a first feed comprising ethylene and optionally a chain transfer agent system (CTA system) into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; andB. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that the second reactor zone contains a CTA system having a transfer activity Z2; andwith the proviso that the ratio of Z1/Z2 is less than 1.2. The process of claim 1 , further comprising one or more steps of transferring a zone reaction product produced in an (ith−1) reaction zone to an (ith) reaction zone claim 1 , where 3≦i≦n claim 1 , and n≧3 ...

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01-11-2012 дата публикации

Ethylene-based polymer compositions for use as a blend component in shrinkage film applications

Номер: US20120277380A1
Принадлежит: Dow Global Technologies LLC

An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions and blends thereof with one or more polymers, such as LDPE, are useful for making many articles, especially including films.

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08-11-2012 дата публикации

High melt strength polyethylene compositions and methods for making the same

Номер: US20120283390A1
Принадлежит: Dow Brasil SA, Dow Global Technologies LLC

The present invention is a method for increasing the melt strength of a polyethylene resin comprising reacting the polyethylene resin with a free radical generator with a decomposition energy in between −50 kJoule/mole and −250 kJoules/mole and a peak decomposition temperature of less than 280 degree C. The resulting resin has increased melt strength with higher ratio of elongational viscosities at 0.1 to 100 rad/s when compared to substantially similar polyethylene resins which have not been reacted with a free radical generator such as an alkoxy amine derivative.

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17-01-2013 дата публикации

EXTRUSION COATING COMPOSITION

Номер: US20130017745A1
Принадлежит: DOW GLOBAL TECHNOLOGIES, INC.

Multimodal polyethylene compositions are provided. Extrusion compositions including the multimodal polyethylene are provided. The extrusion composition further include a high pressure low density polyethylene and optionally other additives and/or polyethylenes. Extruded articles made from the polyethylene extrusion compositions are also provided. 1. A polyethylene resin characterized by:{'sub': w', 'w, 'a. M(abs)/M(RI)>1.05 and <1.6;'}{'sub': z', 'z', 'z', '2', 'z, 'sup': (5.077−0.284*log 10(I', {'sub2': '2'}, ')), 'b. M(measured)/M(calc)>1.4 and <3.0 where M(calc) is calculated from the measured Iaccording to M(calc)=1.5*10;'}{'sub': '2', 'c. I>8.0 g/10 minutes and <15.0 g/10 minutes;'}{'sub': 'w', 'd. CDF(RI fraction)>0.01 at a log 10(M) of 5.5; and'}e. density in the range 0.860-0.965 g/cc.2. An extrusion composition comprising from 80% to 98% a multimodal polyethylene and 2% to 20% LDPE wherein the multimodal polyethylene is characterized by:{'sub': w', 'w, 'a. M(abs)/M(RI)>1.05 and <1.6;'}{'sub': z', 'z', 'z', '2', 'z, 'sup': (5.077−0.284*log 10(I', {'sub2': '2'}, ')), 'b. M(measured)/M(calc)>1.4 and <3.0 where M(calc) is calculated from the measured Iaccording to M(calc)=1.5*10;'}{'sub': '2', 'C. I>8.0 g/10 minutes and <15.0 g/10 minutes;'}{'sub': 'w', 'd. CDF(RI fraction)>0.01 at a log 10(M) of 5.5; and'}e. density in the range 0.860-0.965 g/cc; and{'sub': 2', 'w', 'w, 'the LDPE is characterized by having a Iless than 10 g/10 minutes and greater than 0.2 g/10 minutes, and a M(abs)/M(RI)>2.0.'}3. The extrusion composition of wherein the composition comprises from 91% to 97% multimodal polyethylene and 3% to 9% LDPE and further wherein the multimodal polyethylene is characterized by:{'sub': w', 'w, 'a. M(abs)/ M(RI)>1.10 and <1.20;'}{'sub': z', 'z, 'b. M(measured)/M(calc)>1.5 and <2.5;'}{'sub': '2', 'c. I>9.0 g/10 minutes and <12.0 g/10 minutes;'}{'sub': 'w', 'd. CDF(RI fraction)>0.02 at a log 10(M) of 5.5; and'}e. MWD>3.0 and <3.5; and{'sub': 2', 'w', 'w, 'the ...

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07-02-2013 дата публикации

POLYETHYLENE WITH HIGH MELT STRENGTH FOR USE IN FILMS

Номер: US20130035444A1
Принадлежит:

The present invention is a method for producing a film particularly well suited for shrink film applications, said method comprising the steps of selecting a target polyethylene resin and then increasing the melt strength of the polyethylene resin by reacting the polyethylene resin with an alkoxy amine derivative, and then forming a film from the reacted target polyethylene. 1. A method for producing film particularly well suited for film applications , said method comprising the steps of:{'sup': 3', '3, 'a) selecting a target polyethylene resin having a density, as determined according to ASTM D792, in the range of from 0.90 g/cmto 0.955 g/cm, and a melt index, as determined according to ASTM D1238 (2.16 kg, 190° C.), in the range of from 0.01 g/10 min to 10 g/10 min;'}b) reacting an alkoxy amine derivative in an amount less than 900 parts derivative per million parts by weight of total polyethylene resin with the target polyethylene resin in an amount and under conditions sufficient to increase the melt strength of the polyethylene resin; andc) forming a film comprising the reacted target polyethylene resin.2. The method of wherein the alkoxy amine derivative corresponds to the formula:{'br': None, 'sub': 1', '2', '3, '(R)(R)N—O—R'}{'sub': 1', '2', '4', '42', '4', '42', '1', '2', '3, 'where Rand Rare each independently of one another, hydrogen, C-Calkyl or C-Caryl or substituted hydrocarbon groups comprising O and/or N, and where Rand Rmay form a ring structure together; and Ris hydrogen, a hydrocarbon or a substituted hydrocarbon group comprising O and/or N.'}3. The method of wherein the alkoxy amine derivative is a hydroxylamine ester.4. The method of wherein the hydroxyl amine ester is hydroxyl amine ester being 9-(acetyloxy)-3 claim 3 ,8 claim 3 ,10-triethyl-7 claim 3 ,8 claim 3 ,10-trimethyl-1 claim 3 ,5-dioxa-9-azaspiro[5.5]undec-3-yl]methyl octadecanoate.5. The method of wherein the resulting film is a shrink film.6. A film comprising: [{'sup': 3', '3, 'i) ...

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21-02-2013 дата публикации

ETHYLENE-BASED POLYMER COMPOSITION

Номер: US20130046061A1
Принадлежит: Dow GBlobal Technologies LLC

An ethylene-based polymer composition has been discovered and is characterized by a Comonomer Distribution Constant greater than about 45. The new ethylene-based polymer compositions are useful for making many articles, especially including films. The polymers are made using a metal complex of a polyvalent aryloxyether. 1. An ethylene-based polymer composition characterized by a Comonomer Distribution Constant greater than about 45 and as high as 400 , wherein the composition has less than 120 total unsaturation unit/1 ,000 ,000 C.2. The polymer composition of wherein the composition comprises up to about 3 long chain branches/1000 carbons.3. The polymer composition of having a ZSVR of at least 2.4. The polymer of further characterized by comprising less than 20 vinylidene unsaturation unit/1 claim 3 ,000 claim 3 ,000 C.5. The polymer composition of where in the composition has a bimodal molecular weight distribution.6. The polymer composition of where in the composition has a multi-modal MWD.7. A fabricated article comprising the composition of .8. The polymer composition of further comprising a single DSC melting peak.9. A thermoplastic formulation comprising the composition of and at least one natural or synthetic polymer.10. The formulation of wherein a film comprising the formulation is characterized as having a yellowness b* change over 10 days of 3 or less.11. The formulation of wherein the ethylene-based composition comprises from about 60 to about 95 percent by weight of the formulation.12. The composition of claim 1 , wherein said composition has been at least partially cross-linked (at least 5 wt % gel).13. The composition of wherein the composition has a comonomer distribution profile comprising a mono or bimodal distribution from 35° C. to 120° C. claim 1 , excluding purge.14. The polymer composition of comprising Mw from about 17 claim 1 ,000 to about 220 claim 1 ,000 g/mol.15. (canceled)17. The fabricated article of in the form of at least one film ...

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30-05-2013 дата публикации

BICOMPONENT FIBER

Номер: US20130134088A1
Принадлежит: Trevira GmbH

The present invention relates to a new bicomponent fiber, a nonwoven fabric comprising said new bicomponent fiber and sanitary articles made therefrom. The bicomponent fiber contains a polyethylene-based resin forming at least part of the surface of the fiber longitudinally continuously and is characterized by a Co-monomer Distribution Constant greater than about 45, a recrystallization temperature between 85° C. and 110° C., a tan delta value at 0.1 rad/sec from about 15 to 50, and a complex viscosity at 0.1 rad/second of 1400 Pa.sec or less. The nonwoven fabric comprising the new bicomponent fiber according to the instant invention are not only excellent in softness, but also high in strength, and can be produced in commercial volumes at lower costs due to higher thoughputs and requiring less energy. 1. A bicomponent fiber composed of a polyethylene-based resin (A) and a high-melting point resin (B) whose melting point is higher than that of the above polyethylene-based resin (A) by at least 10° C. , the component ratio by weight of the polyethylene-based resin (A) to the high-melting point resin (B) being in the range of 50/50 to 10/90 , and the polyethylene-based resin (A) forming at least part of the surface of the fiber longitudinally continuously wherein the polyethylene-based resin (A) is characterized by a Co-monomer Distribution Constant greater than about 45 , a recrystallization temperature between 85° C. and 110° C. , a tan delta value at 0.1 rad/sec from about 15 to 50 , and a complex viscosity at 0.1 rad/second of 1400 Pa.sec or less.2. The bicomponent fiber as claimed in claim 1 , wherein the fiber is a core-sheath-type bicomponent fiber claim 1 , and/or a side-by-side-type bicomponent fiber.3. The bicomponent fiber as claimed in claim 1 , wherein the polyethylene-based resin (A) has a single differential scanning calorimetry (DSC) melting peak within the temperature range from 85° C. to 110° C.4. The bicomponent fiber as claimed in claim 1 , wherein ...

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06-06-2013 дата публикации

ETHYLENE/ALPHA-OLEFIN INTERPOLYMER SUITABLE FOR USE IN SHRINKAGE FILM APPLICATIONS, AND ARTICLES MADE THEREFROM

Номер: US20130144019A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides an ethylene/alpha-olefin interpolymer suitable for use in shrinkage film applications, and articles made therefrom. The ethylene/alpha-olefin interpolymer according to the present invention has a CDBI of less than 60%, and comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer, eluting from 85° C. to 90° C. and from 90° C. to 95° C., comprising a weight fraction ratio of >0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95° C. and 100° C. and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95° C. and 100° C., and wherein the ethylene/alpha-olefin interpolymer has a density in the range of 0.920 to 0.940 g/cm. 1. An ethylene/alpha-olefin interpolymer , wherein the ethylene/alpha-olefin interpolymer has a CDBI of less than 60% , and wherein said ethylene/alpha-olefin interpolymer comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer , eluting from 85° C. to 90° C. and from 90° C. to 95° C. , comprising a weight fraction ratio of >0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95° C. and 100° C. and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95° C. and 100° C. , and wherein said ethylene/alpha-olefin interpolymer has a density in the range of 0.920 to 0.940 g/cm.2. A process to make an ethylene/alpha-olefin interpolymer comprising the steps ...

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13-06-2013 дата публикации

COMPOSITION SUITABLE FOR STRETCH HOOD, METHOD OF PRODUCING THE SAME, AND ARTICLES MADE THEREFROM

Номер: US20130149519A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a composition suitable for stretch hood, method of producing the same, and articles made therefrom. The article according to the present invention comprises a multi-layer film according to the present invention has a thickness of at least 3 mils comprising at least one inner layer and two exterior layers, wherein the inner layer comprises at least 50 weight percent polyethylene copolymer having a melt index less than 2 grams/10 minutes, a density less than or equal to 0.910 g/cm, a total heat of fusion less than 120 Joules/gram and a heat of fusion above 115° C. of less than 5 Joules/gram, the total heat of fusion of the inner layer less than the heat of fusion of either of the two exterior layers, and wherein the multi-layer film has an elastic recovery of at least 40% when stretched to 100% elongation. 1. An article comprising a multi-layer film having a thickness of at least 3 mils comprising at least one inner layer and two exterior layers , wherein the inner layer comprises at least 50 weight percent polyethylene copolymer having a melt index less than 2 grams/10 minutes , a density less than or equal to 0.910 g/cm , an total heat of fusion less than 120 Joules/gram and a heat of fusion above 115° C. of less than 5 Joules/gram , and a total heat of fusion of the inner layer is less than a heat of fusion of either of the two exterior layers , and wherein the multi-layer film has an elastic recovery of at least 40% when stretched to 100% elongation.2. The article of claim 1 , wherein the exterior layers are less than 50 weight percent of the total film.3. The article of wherein the film has 3 layers and is made using a blown film process.4. The article of claim 1 , wherein the article is a stretch hood film structure.5. The article of wherein the polyethylene copolymer in the inner layer has a M/Mof at least 2.5.6. The article of wherein the polyethylene copolymer of the inner layer is characterized by a Comonomer Distribution ...

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13-06-2013 дата публикации

ETHYLENE-BASED POLYMER COMPOSITIONS

Номер: US20130150537A1
Принадлежит: Dow Global Technologies LLC

The present invention provides an ethylene-based polymer composition characterized by a Comonomer Distribution Constant in the range of from greater than 45 to less than 400, wherein the composition has less than 120 total unsaturation unit/1,000,000C, and method of producing the same. 1(A) polymerizing ethylene and optionally one or more α-olefins in the presence of a first catalyst to form a semi-crystalline ethylene-based polymer in a first reactor or a first part of a multi-part reactor; and(B) reacting freshly supplied ethylene and optionally one or more α-olefins in the presence of a second catalyst comprising an organometallic catalyst thereby forming an ethylene-based polymer composition in at least one other reactor or a later part of said multi-part reactor, wherein the catalyst of (A) and (B) can be the same or different and each is a metal complex of a polyvalent aryloxyether corresponding to the formula:. A polymerization process comprising:{'sup': '3', 'where Mis Ti, Hf or Zr, preferably Zr;'}{'sup': '4', 'sub': '9-20', 'Aris independently in each occurrence a substituted Caryl group, wherein the substituents, independently in each occurrence, are selected from the group consisting of alkyl; cycloalkyl; and aryl groups; and halo-, trihydrocarbylsilyl- and halohydrocarbyl-substituted derivatives thereof, with the proviso that at least one substituent lacks co-planarity with the aryl group to which it is attached;'}{'sup': '4', 'sub': '2-20', 'Tis independently in each occurrence a Calkylene, cycloalkylene or cycloalkenylene group, or an inertly substituted derivative thereof;'}{'sup': '21', 'Ris independently in each occurrence hydrogen, halo, hydrocarbyl, trihydrocarbylsilyl, trihydrocarbylsilylhydrocarbyl, alkoxy or di(hydrocarbyl)amino group of up to 50 atoms not counting hydrogen;'}{'sup': 3', '3', '3', '21, 'Ris independently in each occurrence hydrogen, halo, hydrocarbyl, trihydrocarbylsilyl, trihydrocarbylsilylhydrocarbyl, alkoxy or amino of up ...

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25-07-2013 дата публикации

ETHYLENE/ALPHA-OLEFIN INTERPOLYMER SUITABLE FOR USE IN FIBER APPLICATIONS, AND FIBERS MADE THEREFROM

Номер: US20130190465A1
Принадлежит:

The instant invention provides an ethylene/alpha-olefin interpolymer suitable for use in fiber applications, and fibers made therefrom. The ethylene/alpha-olefin interpolymer according to the present invention has a CDBI of less than 60%, and comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer, eluting from 85° C. to 90° C. and from 90° C. to 95° C., comprising a weight fraction ratio of >0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95° C. and 100° C. and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95° C. and 100° C., and wherein the ethylene/alpha-olefin interpolymer has a density in the range of from 0.920 to 0.965 g/cm, and a melt index (I) in the range of from 0.5 to 100 g/10 minutes, and melt flow ratio (I/I) in the range of from 5.8 to 8. 1. An ethylene/alpha-olefin interpolymer , wherein the ethylene/alpha-olefin interpolymer has a CDBI of less than 60% , and wherein said ethylene/alpha-olefin interpolymer comprises at least two fractions in crossfractionation of the ethylene/alpha-olefin interpolymer , eluting from 85° C. to 90° C. and from 90° C. to 95° C. , comprising a weight fraction ratio of >0.68 and a molecular weight homogeneity index of greater than 0.65; wherein the weight fraction ratio is the ratio of the weight of polymer in each fraction divided by the weight of polymer eluting between 95° C. and 100° C. and the molecular weight homogeneity index is the ratio of the weight average molecular weight of the polymer in the fraction divided by the weight average molecular weight of the polymer eluting between 95° C. and 100° C. , and wherein said ethylene/alpha-olefin interpolymer has a density ...

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15-08-2013 дата публикации

Sealant composition, method of producing the same

Номер: US20130210990A1
Принадлежит: Dow Global Technologies LLC

The instant invention is a sealant composition, method of producing the same, articles made therefrom, and method for forming such articles. The sealant composition according to the present invention comprises: (a) from 70 to 99.5 percent by weight of an ethylene/α-olefin interpolymer composition, based on the total weight of the sealant composition, wherein said ethylene/α-olefin interpolymer composition comprises an ethylene/α-olefin interpolymer, wherein ethylene/α-olefin interpolymer has a Comonomer Distribution Constant (CDC) in the range of from 15 to 250, and a density in the range of from 0.875 to 0.963 g/cm 3 , a melt index (I2) in a range of from 0.2 to 20 g/10 minutes, and long chain branching frequency in the range of from 0.02 to 3 long chain branches (LCB) per 1000C; (b) from 0.5 to 30 percent by weight of a propylene/α-olefin interpolymer composition, wherein said propylene/α-olefin interpolymer composition comprises a propylene/α-olefin copolymer or a propylene/ethylene/butene terpolymer, wherein said propylene/α-olefin copolymer has a crystallinity in the range of from 1 percent by weight to 30 percent by weight, a heat of fusion in the range of from 2 Joules/gram to 50 Joules/gram, and a DSC melting point in the range of 25° C. to 110° C.

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12-09-2013 дата публикации

ETHYLENE-BASED POLYMERS AND PROCESSES FOR THE SAME

Номер: US20130237678A1
Принадлежит: Dow Global Technologies LLC

The invention provides an ethylene-based polymer formed from at least the following: ethylene and a “monomeric chain transfer agent (monomeric CTA),” comprising a “copolymerization end” and a “chain transfer end.” 1. An ethylene-based polymer formed from at least the following: ethylene and a “monomeric chain transfer agent (monomeric CTA) ,” comprising a “copolymerization end” and a “chain transfer end.”2. The ethylene-based polymer of claim 1 , and wherein the “monomeric chain transfer agent” is not a “non-conjugated diunsaturated monomer.”5. The ethylene-based polymer of claim 1 , wherein the ethylene-based polymer comprises claim 1 , in reacted form claim 1 , at least 0.075 moles of the monomeric CTA per 1000 moles of ethylene-based backbone carbons claim 1 , based on the weight of the polymer.6. The ethylene-based polymer of claim 1 , wherein the monomeric CTA has 1H NMR signals from 3.0 to 5.0 ppm chemical shift.8. The ethylene-based polymer of claim 1 , wherein the polymer has a strain hardening factor (SHF) greater than 3 claim 1 , at Hencky strain rates from 10 sto 1.0 s.9. A composition comprising the ethylene-based of .10. An article comprising at least one component formed from the composition of . The present application claims the benefit of U.S. Provisional Application No. 61/408,124, filed on Oct. 29, 2010, and fully incorporated herein by reference.Conventional low density polyethylene (LDPE) has good processability, however, when used in film application, increased melt strength is still desired.U.S. Publication No. 2008/0242809 discloses a process for the preparation of a copolymer of ethylene and a comonomer, and where the polymerization takes place in a tubular reactor, at a peak temperature between 290° C. and 350° C. The comonomer is a di- or higher functional (meth)acrylate, and the co monomer is used in an amount between 0.008 mole percent and 0.200 mole percent, relative to the amount of ethylene copolymer.International Publication No. WO ...

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26-09-2013 дата публикации

PROCESSES TO PREPARE ETHYLENE-BASED POLYMER COMPOSITIONS

Номер: US20130253126A1
Принадлежит: Dow Global Technologies LLC

The invention provides a process to form an ethylene-based polymer composition, the process comprising at least the following: Step 1: polymerizing a first ethylene-based polymer in the presence of at least one molecular catalyst and a hydrocarbon chain transfer agent, and at a polymerization pressure of at least 14,000 psi; Step 2: polymerizing a second ethylene-based polymer. 1. A process to form an ethylene-based polymer composition , the process comprising at least the following:Step 1: polymerizing a first ethylene-based polymer in the presence of at least one molecular catalyst and a hydrocarbon chain transfer agent, and at a polymerization pressure of at least 14,000 psi;Step 2: polymerizing a second ethylene-based polymer2. The process of claim 1 , wherein the second ethylene-based polymer is polymerized in the presence of a free radical initiator.3. The process of claim 1 , wherein the first ethylene-based polymer and the second ethylene-based polymer are polymerized simultaneously.4. The process of claim 1 , wherein the first ethylene-based polymer is polymerized first claim 1 , and wherein the second ethylene-based polymer is polymerized in the presence of the first ethylene-based polymer.6. The process of claim 1 , wherein the molecular catalyst is soluble in supercritical ethylene.7. The process of claim 1 , wherein the first ethylene-based polymer is polymerized in the presence of an alumoxane cocatalyst.8. The process of claim 1 , wherein the free radical initiator is a peroxide.9. The process of claim 1 , wherein the polymerization temperature in Step 1 is greater than claim 1 , or equal to claim 1 , 195° C.10. The process of claim 1 , wherein no hydrogen is added to Step 1 or Step 2.11. The process of claim 1 , wherein the process further comprises polymerizing a third ethylene-based polymer.12. The process of claim 1 , wherein at least one alkyl aluminum is added to the process after Step 2.13. The process of claim 1 , wherein at least one ...

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31-10-2013 дата публикации

ANTIOXIDANT COMPOUNDS FOR POLYOLEFIN RESINS

Номер: US20130287985A1
Принадлежит:

The present invention is a composition suitable for use as an antioxidant for polyolefin resins, said composition having a structure corresponding to the formula: wherein R, R, R, R, Rand Rare selected from a hydrogen or an alkyl group having 1 to 24 carbon atoms, or a branched alkyl group having 1 to 24 carbon atoms, or a cyclic alkyl group with 1 to 24 carbon atoms; wherein said composition has a peak decomposition temperature of less than 280° C. and a total decomposition energy which is endothermic or if exothermic, releases no more energy; than 40 kJoules/mole. 2. A composition of wherein the compound is 3 claim 1 ,4-diethyl-3 claim 1 ,4-diphenyl hexane.3. A composition of wherein the composition is 3 claim 1 ,4-dipropyl-3 claim 1 ,4-diphenyl hexane.4. A composition of wherein the composition is 3 claim 1 ,4-di-isopropyl-3 claim 1 ,4-diphenyl hexane.5. A composition of wherein the composition is 3 claim 1 ,4-methyl-3 claim 1 ,4-diphenyl hexane.6. A composition of wherein the composition is 3 claim 1 ,4-dibutyl-3 claim 1 ,4-diphenyl hexane.7. A composition of wherein the composition is 3 claim 1 ,4-di-tert-butyl-3 claim 1 ,4-diphenyl hexane.8. The composition of wherein the composition has a peak decomposition temperature of less than 250° C.9. The composition of wherein the decomposition energy is endothermic.10. A composition comprising of{'sup': '3', 'a. a polyethylene resin having at least 50% by weight of units derived from ethylene, and having a density from 0.875 to 0.975 g/cmand a melt index of 0.01 g/10 min to 150 g/10 min; and'}b. a compound capable of generating free radicals at a peak decomposition temperature of 280° C. or less and a total decomposition energy which is endothermic or if exothermic, releases no more energy than 40 kJoules/mole.11. The composition of wherein the compounds of component b are combined with other antioxidants such that the compounds of component b comprise at least 1% of the total antioxidant present.13. The composition ...

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09-01-2014 дата публикации

Process to Produce Enhanced Melt Strength Ethylene/Alpha-Olefin Copolymers and Articles Thereof

Номер: US20140011927A1
Принадлежит: Dow Global Technologies LLC

An ethylene/α-olefin copolymer comprising units derived from ethylene; and units derived from at least one α-olefin; wherein the ethylene/α-olefin copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/α-olefin copolymer is provided. Also provided is a process for producing an ethylene/α-olefin copolymer comprising: (1) polymerizing ethylene and one or more α-olefins in a polymerization reactor; (2) thereby producing an enhanced melt strength ethylene/α-olefin copolymer having from 300 to 500 vinyl unsaturation units per 1,000,000 carbon atoms, a density in the range of from 0.90 to 0.94 g/cc; a melt index (I) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5. 1. An ethylene/α-olefin copolymer comprising:units derived from ethylene; andunits derived from at least one α-olefin;{'sub': '2', 'wherein the ethylene/α-olefin copolymer has a density in the range of from 0.90 to 0.94 g/cc; a melt index (I) in the range of from 0.05 to 50 dg/min; an Mw/Mn of from 3 to 5; and'}from 300 to 500 vinyl unsaturations per 1,000,000 carbon atoms in the ethylene/α-olefin copolymer, and wherein the ethylene/α-olefin copolymer is produced using a polymerization step occurring at a temperature of at least 205° C.2. A process for producing an ethylene/α-olefin copolymer comprising the steps of: (1) polymerizing ethylene and one or more α-olefins in a polymerization reactor wherein the ethylene/α-olefin copolymer is produced using a polymerization step occurring at a temperature of at least 205° C.; (2) thereby producing an enhanced melt strength ethylene/α-olefin copolymer having from 300 to 500 vinyl unsaturation units per 1 ,000 ,000 carbon atoms , a density in the range of from 0.90 to 0.94 g/cc; a melt index (I) in the range of from 0.05 to 50 dg/min; and a Mw/Mn of from 3 to 5.3. The process ...

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23-01-2014 дата публикации

LONG CHAIN BRANCHED (LCB), BLOCK OR INTERCONNECTED COPOLYMERS OF ETHYLENE IN COMBINATION WITH ONE OTHER POLYMER

Номер: US20140024775A1
Принадлежит: Dow Global Technologies LLC

An ethylenic polymer comprising amyl groups from about 0.1 to about 2.0 units per 1000 carbon atoms as determined by Nuclear Magnetic Resonance and both a peak melting temperature, T, in ° C., and a heat of fusion, H, in J/g, as determined by DSC Crystallinity, where the numerical values of Tand Hcorrespond to the relationship T≧(0.2143*H)+79.643. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 95° C. or greater using a Preparative Temperature Rising Elution Fractionation method, where at least one preparative TREF fraction that elutes at 95° C. or greater has a gpcBR value greater than 0.05 and less than 5 as determined by gpcBR Branching Index by 3D-GPC, and where at least 5% of the ethylenic polymer elutes at a temperature of 95° C. or greater based upon the total weight of the ethylenic polymer. 120-. (canceled)21. A process , comprising:A) polymerizing ethylene in the presence of a catalyst to form a linear ethylene-based polymer having a crystallinity of at least 50% as determined by DSC Crystallinity in a first reactor or a first part of a multi-part reactor; andB) reacting the linear ethylene-based polymer with additional ethylene in the presence of a free-radical initiator to form an ethylenic polymer in at least one other reactor or a later part of a multi-part reactor.22. The process of claim 21 , where the reaction of step (B) occurs by graft polymerization.23. The process of claim 21 , where the catalyst of step (A) is a metallocene catalyst.24. The process of claim 23 , where polar compounds claim 23 , if present in the first reactor or the first part of a multi-part reactor claim 23 , do not inhibit the activity of the metallocene catalyst. This application claims the priority benefit under 35 USC §119(e) to U.S. Provisional Patent Application No. 61/036,329, filed Mar. 13, 2008, the disclosure of which is incorporated herein by reference.There are many types of polyethylene made and sold today. Two types in ...

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20-03-2014 дата публикации

Multi-metallic ziegler-natta procatalysts and cataysts prepared therefrom for olefin polymerizations

Номер: US20140080970A1
Принадлежит: Dow Global Technologies LLC

Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties.

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06-01-2022 дата публикации

A NON-WOVEN FABRIC HAVING ETHYLENE/ALPHA-OLEFIN POLYMER FIBERS

Номер: US20220002924A1
Принадлежит:

A nonwoven fabric comprises at least one fiber having a first component prepared from at least 75 wt. % of bimodalethylene/alpha-olefin interpolymer composition, wherein the ethylene/alpha-olefin interpolymer composition is characterized by: a density in the range of 0.930 to 0.965 g/cm, a melt index (I2) in the range of from 10 to 60 g/10 minutes, wherein the I2 is measured according to ASTM D1238, 190 C, 2.16 kg, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (M/M) as determined by GPC of from 1.5 to 2.6, a tan delta at 1 radian/second of at least 45, a low temperature peak and a high temperature peak on an elution profile via improved comonomer composition distribution (ICCD) procedure, and a full width at half maximum of the high temperature peak is less than 6.0° C. 1. A nonwoven fabric comprising at least one fiber having a first component prepared from at least 75 wt. % of an ethylene/alpha-olefin interpolymer composition , wherein the ethyl ene/alpha-olefin interpolymer composition has:a density in the range of 0.930 to 0.965 g/cm3,a melt index (12) in the range of from 10 to 60 g/10 minutes, wherein the 12 is measured according to ASTM D1238, 190 C, 2.16 kga molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (MW(GPC)/Mn(GPC)) as determined by GPC in the range of from 1.5 to 2.6,a tan delta at 1 radian/second of at least 45,a low temperature peak and a high temperature peak on an improved comonomer composition distribution (ICCD) elution profile by Crystallization Elution Fractionation, preferably two distinguishable peaks between 35° C. to 110° C., anda full width at half maximum of the high temperature peak is less than 6.0° C.2. The nonwoven fabric of claim 1 , wherein the ethylene/alpha-olefin interpolymer composition has an 110/12 of less than 6.9 claim 1 , wherein the 110 is measured according ...

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03-01-2019 дата публикации

CAST FILMS, AND ARTICLES MADE THEREFROM

Номер: US20190002602A1
Принадлежит:

Disclosed herein is a cast film comprising a polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers, wherein said polyethylene composition is characterized by the following properties: a melt index, I2, measured according to ASTM D1238 (2.16 kg, 190° C.), of from 1 to 20 g/10 min; a density (measured according to ASTM D792) of from 0.935 to 0.970 g/cm3; a melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg, 190° C.) of from 5.5 to 7.0; a molecular weight distribution (Mw/Mn) of from 2.2 to 3.5; and a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms present in the backbone of the composition. 1. A cast film comprising a polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers , wherein said polyethylene composition is characterized by the following properties:{'sub': '2', 'a. a melt index, I, measured according to ASTM D 1238 (2.16 kg, 190° C.), of from 1 to 20 g/10 min;'}{'sup': '3', 'b. a density (measured according to ASTM D792) of from 0.940 to 0.970 g/cm;'}{'sub': 10', '2', '10, 'c. a melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg, 190° C.) of from 5.5 to 7.0;'}{'sub': w', 'n, 'd. a molecular weight distribution (M/M) of from 2.2 to 3.5; and'}e. a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms present in the backbone of the composition.2. The cast film of claim 1 , wherein the cast film further comprises a low density polyethylene having a melt index claim 1 , I claim 1 , range of from 0.1-20 g/10 min.3. The cast film of claim 2 , wherein the cast film comprises from 5-30% of the low density polyethylene.4. The cast film of claim 1 , wherein the cast film is a monolayer film.5. The cast film of claim 1 , wherein the cast film is a multilayer film.6. The cast film of claim 1 , wherein the cast film is a cast embossed film.7. The ...

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02-01-2020 дата публикации

POLYMERS FOR USE IN FIBERS AND NONWOVEN FABRICS, ARTICLES THEREOF, AND COMPOSITES THEREOF

Номер: US20200002849A1
Принадлежит:

An ethylene/alpha-olefin interpolymer suitable for use in fibers and nonwovens having a density of from 0.911 to 0.939 g/cc, a Brookfield viscosity of less than or equal to 50,000 cP, and a molecular weight distribution (M/M) of 1.8 to 3.5, and articles thereof. 1. An ethylene/alpha-olefin interpolymer suitable for use in fibers and nonwovens having a density of from 0.911 to 0.939 g/cc , a Brookfield viscosity of less than or equal to 50 ,000 cP , and a molecular weight distribution (M/M) of 1.8 to 3.5.2. The interpolymer of claim 1 , wherein the ethylene/alpha-olefin interpolymer has an M/Mis less than 5.25.3. The interpolymer of claim 1 , wherein the ethylene/alpha-olefin interpolymer has a weight fraction (w) of molecular weight greater than 10g/mole claim 1 , based on the total weight of interpolymer claim 1 , as determined by conventional gel permeation chromatography claim 1 , of less than 2.5%.4. The interpolymer of claim 1 , wherein the ethylene/alpha-olefin interpolymer has a comonomer distribution breadth index of greater than 50%.5. A meltblown nonwoven comprising an ethylene/alpha-olefin interpolymer claim 1 , wherein the ethylene/alpha-olefin interpolymer has:a density of from 0.911 to 0.939 g/cc,a Brookfield viscosity of less than or equal to 50,000 cP, and{'sub': w,cc', 'n,cc, 'a molecular weight distribution (M/M) of 1.8 to 3.5.'}6. The meltblown nonwoven of claim 5 , wherein the ethylene/alpha-olefin interpolymer has an M/Mof less than 5.25.7. The meltblown nonwoven of claim 5 , wherein the ethylene/alpha-olefin interpolymer has a weight fraction (w) of molecular weight greater than 10g/mole claim 5 , based on the total weight of interpolymer claim 5 , and as determined by conventional gel permeation chromatography claim 5 , of less than 2.5%.8. The meltblown nonwoven of claim 5 , wherein the ethylene/alpha-olefin interpolymer has a comonomer distribution breadth index of greater than 50%.9. A composite structure comprising the meltblown nonwoven ...

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11-01-2018 дата публикации

CATALYST SYSTEMS FOR OLEFIN POLYMERIZATION

Номер: US20180009958A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides procatalysts and catalyst systems for olefin polymerization, olefin based polymers polymerized therewith, and process for producing the same. In one embodiment, the instant invention provides a procatalyst comprising a metal-ligand complex of formula (I): 2. The procatalyst according to wherein Z is O.3. A catalyst system comprising the reaction product of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'one or more procatalysts of ; and'}one or more cocatalysts; wherein the ratio of total number of moles of the one or more metal-ligand complexes of formula (I) to total number of moles of the one or more cocatalysts is from 1:10,000 to 100:1.4. A polymerization process comprising the steps of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'polymerizing one or more α-olefins in the presence of one or more catalyst systems of under olefin polymerizing conditions; and thereby forming an olefin based polymer.'}5. An olefin based polymer comprising the polymerization reaction product of:{'claim-ref': {'@idref': 'CLM-00003', 'claim 3'}, 'one or more α-olefins in the presence of one or more catalyst systems of under olefin polymerizing conditions.'} The present application is a continuation of U.S. patent application Ser. No. 14/437,543, filed on Apr. 22, 2015, which is a national stage entry of PCT/US2013/073976, filed on Dec. 10, 2013, which claims the benefit of U.S. Provisional Application No. 61/746,151, filed on Dec. 27, 2012.The instant invention relates to procatalysts and catalyst systems for olefin polymerization, olefin based polymers polymerized therewith, articles made from such polymers, and process for producing the same.Olefin based polymers such as polyethylene and/or polypropylene are produced via various catalyst systems. Selection of such catalyst system used in the polymerisation process of the olefin based polymers is an important factor contributing to the characteristics and properties of such olefin based ...

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09-01-2020 дата публикации

Oriented polyethylene films and a method for making the same

Номер: US20200010631A1
Принадлежит: Dow Global Technologies LLC

A first oriented film comprising a first polyethylene composition which comprises: from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an I 2 lower than 2 g/10 min; and from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than or equal to 0.925 g/cc and an I 2 greater than or equal to 2 g/10 min; wherein the first polyethylene composition has an 12 from 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc is provided.

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24-01-2019 дата публикации

AN ETHYLENE/ALPHA-OLEFIN COPOLYMER COMPOSITION, AND ARTICLES COMPRISING THE SAME

Номер: US20190023883A1
Принадлежит: Dow Global Technologies LLC

An ethylene/alpha-olefin copolymer composition having a density from 0.935 to 0.955 g/cc; a ratio of weight average molecular weight to number average molecular weight, Mw/Mn, of from 3 to 10; a z-average molecular weight, Mz, from 200 kg/mol to 500 kg/mol; and a PENT value of greater than 500 hours at 80° C. and 2.4 MPa; wherein when the composition is formed into a monolayer pipe the pipe has a pipe hydrostatic strength of greater than 100 hours at 20° C. and 12.0 MPa. Also provided is a pipe or pipe fitting comprising the ethylene/alpha-olefin copolymer composition. 1. A pipe fabricated from an ethylene/alpha-olefin copolymer composition having:a) a density from 0.935 to 0.955 g/cc;b) a ratio of weight average molecular weight to number average molecular weight, Mw/Mn, of from 3 to 10;c) a z-average molecular weight, Mz, of from 200 kg/mol to 500 kg/mol; andd) a PENT value determined according to ASTM F1473-13 of greater than 500 hours at 80° C. and 2.4 MPa;wherein the pipe has a pipe hydrostatic strength, determined according to ISO 1167, of greater than 100 hours at 20° C. and 12.0 MPa as specified in EN 12201-2.2. The pipe of claim 1 , wherein the pipe further exhibits a pipe hydrostatic strength claim 1 , determined according to ISO 1167 claim 1 , of at least 1 claim 1 ,000 hours at 95° C. and 3.6 MPa as specified in ISO 22391-2.3. The pipe of claim 1 , wherein the composition further exhibits a zero shear viscosity ratio claim 1 , ZSVR claim 1 , of from 1.5 to 20.4. The pipe of claim 1 , wherein the composition further exhibits a dynamic viscosity claim 1 , η* claim 1 , at 100 rad/sec and 190° C. of less than 2 claim 1 ,000 Pa-s.5. The pipe of claim 1 , wherein the composition further exhibits a dynamic viscosity claim 1 , η* claim 1 , at 0.1 rad/sec and 190° C. from 10 claim 1 ,000 to 70 claim 1 ,000 Pa-s.6. The pipe of claim 1 , wherein the composition has a density from 0.940 to 0.952 g/cc.7. The pipe of claim 1 , wherein the composition has a ratio of ...

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24-04-2014 дата публикации

Polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom

Номер: US20140113090A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyethylene blend composition suitable for blown film, method of producing the same, and films made therefrom. The polyethylene blend composition suitable for blown film according to the present invention comprises the melt blending product of: (a) less than or equal to 4 percent by weight of a low density polyethylene (LDPE) having a density in the range of from 0.915 to 0.935 g/cm 3 , and a melt index (I 2 ) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M w /M n ) in the range of from 6 to 10; (b) 90 percent or greater by weight of a heterogenous linear low density polyethylene (hLLDPE) having a density in the range of from 0.917 to 0.950 g/cm 3 , and a melt index (I 2 ) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; and (e) optionally one or more antioxidants. When the polyethylene blend-composition is formed into a film via blown film process, the output rate is improved at least 6 percent relative to a similar linear low density polyethylene.

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17-02-2022 дата публикации

CRIMPED MULTI-COMPONENT FIBERS

Номер: US20220049377A1
Принадлежит:

Disclosed is a curly fiber having a fiber centroid and comprising a first region having a first centroid and a second region wherein the first region comprises an ethylene/alpha olefin interpolymer composition in an amount of at least 75 weight percent based on total weight of the first region and wherein the ethylene/alpha olefin interpolymer composition is characterized by a low temperature peak and a high temperature peak on an elution profile via improved comonomer composition distribution (ICCD) procedure, and a full width at half maximum of the high temperature peak is less than 6.0° C. and the second region is a material comprising a polymer which is different from the ethylene/alpha-olefin interpolymer of the first region and wherein the regions are arranged such that at least one of the first centroid and the second centroid is not the same as the fiber centroid. 1. A curly fiber having a fiber centroid and comprising a first region having a first centroid and a second region having a second centroid wherein the first region comprises an ethylene/alpha olefin interpolymer composition in an amount of at least 75 weight percent based on total weight of the first region and wherein the ethyl ene/alpha olefin interpolymer composition is characterized by a low temperature peak and a high temperature peak on an elution profile via improved comonomer composition distribution (ICCD) procedure , and a full width at half maximum of the high temperature peak is less than 6.0° C. and the second region is a material comprising a polymer which is different from the ethyl ene/alpha-olefin interpolymer of the first region and wherein the regions are arranged such that at least one of the first centroid and the second centroid is not the same as the fiber centroid.2. The fiber of wherein the ethyl ene/alpha olefin interpolymer composition is further characterized by one or more of: a density in the range of 0.930 to 0.965 g/cm3 claim 1 , a melt index (I2) in the range of ...

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31-01-2019 дата публикации

Process for Producing Functionalized Ethylene-Based Polymers with a Low Gel Content

Номер: US20190031806A1
Принадлежит:

Functionalized ethylene-based polymers are prepared by a process comprising the step of reacting a first composition comprising an ethylene-based polymer with at least the following: (A) at least one carbon-carbon (C—C) free radical initiator of Structure I: wherein R, R, R, R, Rand Rare each, independently, hydrogen or a hydrocarbyl group; and wherein, optionally, two or more R groups (R, R, R, R, Rand R) form a ring structure; and with the provisos that (i) at least one of Rand Ris a hydrocarbyl group of at least two carbon atoms, and (ii) at least one of Rand Ris a hydrocarbyl group of at least two carbon atoms; and (B) at least one free radical initiator other than the carbon-carbon (C—C) free radical initiator of Structure I (a non-C—C free radical initiator), e.g., a peroxide; and (C) at least one functionalization agent, e.g., maleic anhydride. 2. The process of wherein the first composition further comprises a secondary antioxidant.3. The process of claim 1 , wherein the ethylene-based polymer of the first composition is an ethylene/α-olefin copolymer.6. The process of claim 1 , wherein the C—C free-radical initiator has a decomposition temperature of greater than claim 1 , or equal to claim 1 , (≥)125° C. based on a DSC measurement.7. The process of claim 1 , wherein at least one of the non-C—C free radical initiators of (B) is one of the following: an inorganic or organic peroxide claim 1 , an azo compound claim 1 , a sulfur compound claim 1 , or a halogen compound.8. A composition comprising a functionalized ethylene-based polymer made by the process of .9. The composition of claim 8 , wherein the composition has a GI 200 gel content less than claim 8 , or equal to claim 8 , 12 claim 8 , as determined by the GI 200 test method with a film thickness of 76±5 microns.10. An article comprising at least one component formed from the composition of . The present application claims the benefit of U.S. Provisional Application 62/288,017, filed on Jan. 28, 2016, ...

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30-01-2020 дата публикации

ETHYLENE-BASED POLYMER COMPOSITIONS FOR IMPROVED EXTRUSION COATINGS

Номер: US20200032039A1
Принадлежит:

The invention provides a composition comprising at least the following: 1. A composition comprising at least the following:a) a first composition comprising at least one first ethylene-based polymer, formed by high pressure, free-radical polymerization, and wherein the first composition comprises the following properties: a melt index (I2) from 1.0 to 15.0 g/10 min, and density from 0.910 to 0.940 g/cc;b) a second composition comprising at least one second ethylene-based polymer, and wherein the second composition comprises the following properties: a melt index (I2) from 1.0 to 1000 g/10 min, and a density greater than 0.940 g/cc;wherein the melt index (I2) ratio of the melt index (I2) of the second composition to the melt index (I2) of the first composition is from 0.50 to 2.70;wherein the composition comprises the following properties: melt index (I2) from 2.0 to 20.0 g/10 min, and a density from 0.910 to 0.935 g/cc; andwherein the first composition is present in an amount from 65 to 95 wt %, based on the weight of the composition.2. The composition of claim 1 , wherein the melt index (I2) ratio of “the composition” to “the second composition” is from 0.30 to 2.00.3. The composition of claim 1 , wherein the first ethylene-based polymer is prepared in a tubular reactor.4. The composition of claim 1 , wherein the first composition comprises ≥95 wt % of the first ethylene-based polymer claim 1 , based on the weight of the first composition.5. The composition of claim 1 , wherein the first ethylene-based polymer is a low density polyethylene (LDPE).6. The composition of claim 1 , wherein the second composition comprises ≥95 wt % of the second ethylene-based polymer claim 1 , based on the weight of the second composition.7. The composition of claim 1 , wherein the second composition has a density from 0.940 to 0.966 g/cc.8. The composition of claim 1 , wherein the second ethylene-based polymer is a high density polyethylene (HDPE).9. The composition of claim 1 , ...

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24-02-2022 дата публикации

POLYETHYLENE-BASED COMPOSITIONS AND FILMS AND ARTICLES COMPRISING THE SAME

Номер: US20220056250A1
Принадлежит:

The present invention provides polyethylene-based compositions suitable for packaging applications, films, and articles. In one aspect, a polyethylene-based composition suitable for packaging applications comprises (a) at least 97% by weight, based on the total weight of the polyethylene-based composition, of a polyethylene composition comprising: (i) from 25 to 37 percent by weight of a first polyethylene fraction having a density in the range of 0.935 to 0.947 g/cmand a melt index (I) of less than 0.1 g/10 minutes; and (ii) from 63 to 75 percent by weight of a second polyethylene fraction; and (b) 90 to 540 ppm, based on the total weight of the polyethylene-based composition of a calcium salt of 1,2-cyclohexanedicarboxylic acid; wherein the polyethylene composition has less than 0.10 branches per 1,000 carbon atoms when measured using C NMR, wherein the density of the polyethylene-based composition N is at least 0.965 g/cm, and wherein the melt index (I) of the polyethylene-based composition is 0.5 to 10 g/10 minutes. 2. The polyethylene-based composition of claim 1 , wherein the polyethylene composition comprises from 25 to 37 percent by weight of the first polyethylene fraction having a density in the range of 0.940 to 0.947 g/cmand from 63 to 75 percent by weight of the second polyethylene fraction having a density of 0.970 g/cmor greater.3. The polyethylene-based composition of claim 1 , wherein the melt index (I) of the polyethylene-based composition is 2.5 g/10 minutes or less.4. The polyethylene-based composition of claim 1 , wherein the ratio of the melt index (I) of the second polyethylene fraction to the melt index (I) of the first polyethylene fraction is at least 1 claim 1 ,000.5. The polyethylene-based composition of claim 1 , wherein the polyethylene-based composition has a zero shear viscosity ratio of less than 2.0.6. The polyethylene-based composition of further comprising a fatty acid metal salt in the amount of 45 to 360 ppm claim 1 , based on ...

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03-03-2016 дата публикации

An ethylene/alpha-olefin interpolymer composition

Номер: US20160060373A1
Принадлежит: Dow Global Technologies LLC

An ethylene/alpha-olefin interpolymer composition suitable for pipe applications prepared via solution polymerization process, and pipes made therefrom. The ethylene/alpha-olefin interpolymer composition suitable for pipe applications according to the present invention comprises greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.925 to 0.935 g/cm 3 , a melt index I 2 in the range of from 0.3 to 1.0 g/10 minutes, a melt flow ratio I 10 /I 2 in the range of from 7.9 to 11, a melt strength in the range of from 3 to 10 cN, a DSC heat curve having a melting peak temperature in the range of from 120 to 130° C., a crystallinity in the range of from 50 to 70 percent, a 1% flexural modulus in the range from 350 to 600 MPa, and a zero shear viscosity ratio (ZSVR) in the range of from 2 to 10.

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15-05-2014 дата публикации

HIGH PRESSURE LOW DENSITY POLYETHYLENE RESINS WITH IMPROVED OPTICAL PROPERTIES PRODUCED THROUGH USE OF HIGHLY ACTIVE CHAIN TRANSFER AGENTS

Номер: US20140135459A1
Принадлежит: Dow Global Technologies LLC

Disclosed is an ethylene-based polymer with a density from about 0.90 to about 0.94 in grams per cubic centimeter, with a molecular weight distribution (M/M) from about 2 to about 30, a melt index (I) from about 0.1 to about 50 grams per 10 minutes, and further comprising sulfur from about 5 to about 4000 parts per million. The amount of sulfur is also determined based upon the total weight of the ethylene-based polymer. Also disclosed is process for making an ethylene-based polymer which includes the steps of splitting a process fluid for delivery into a tubular reactor; feeding an upstream process feed stream into a first reaction zone and at least one downstream process feed stream into at least one other reaction zone, where the process fluid has an average velocity of at least 10 meters per second; and initiating a free-radical polymerization reaction. 115-. (canceled)16. An ethylene-based polymer with long chain branching as characterized by a gpcBR value greater than 0.05 as determined by a gpcBR Branching Index and a GPC-LS Characterization value greater than 2.1 as determined by a GPC-LS Characterization method.17. The ethylene-based polymer of claim 16 , where the GPC-LS Characterization value is from about 2.1 to about 10.20. The ethylene-based polymer of claim 18 , where the ethylene-based polymer has long chain branching as characterized by a gpcBR value greater than 0.05 as determined by a gpcBR Branching Index by 3D-GPC method.22. The process of claim 21 , where the process fluid further comprises at least one chain transfer agent with a Cs less than 1.23. The process of claim 21 , where the upstream process feed stream has a CTA molar flow ratio from about 0.01 to about 100.24. The process of claim 21 , where the at least one chain transfer agent with a Cs greater than 1 has a concentration in the upstream process feed stream from about 1 molar ppm to about 600 molar ppm.25. The process of claim 21 , where the difference in the ethylene conversion ...

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15-05-2014 дата публикации

Ethylene-based polymers and processes to make the same

Номер: US20140135462A1
Принадлежит: Dow Global Technologies LLC

The invention provides a process to form an ethylene-based polymer, said process comprising polymerizing ethylene in the presence of at least one free-radical agent, and in the presence of a “metal alkyl-containing compound” selected from the group consisting of the following: i) at least one “Group II metal alkyl-containing compound,” ii) at least one “Group III metal alkyl-containing compound,” or iii) a combination of i) and ii). The invention also provides a composition comprising at least one ethylene-based polymer, prepared from a free-radical polymerization, and wherein the ethylene-based polymer has the following property: y>0.28567x−0.00032, wherein y=vinyl/1000 C, as determined by 1H NMR, and x=mol % polymerized ?-olefin, as determined by 13C NMR. The invention also provides a composition comprising at least one ethylene-based polymer, prepared from a free-radical polymerization, and wherein the ethylene-based polymer has the following properties: A) a vinyl content greater than, or equal to, 0.3 vinyl per 1000 C (total carbons), and B) a polymerized alpha-olefin level less than, or equal to, 1.00 mole percent, based on the total moles of polymerized monomers.

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22-05-2014 дата публикации

Compositions of Ethylene/Alpha-Olefin Multi-Block Interpolymer Suitable for Films

Номер: US20140141228A1
Принадлежит: Dow Global Technologies LLC

Compositions suitable for film comprise at least one ethylene/α-olefin interpolymer, wherein the ethylene/α-olefin interpolymer may have, for example, a Mw/Mn from about 1.7 to about 3.5, at least one melting point, Tm, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: 120-. (canceled)21. A multilayer film comprising:at least one layer comprising an ethylene/α-olefin multi-block interpolymer.22. The multilayer film of comprising a second layer selected from the group consisting of a barrier layer claim 21 , a tie layer claim 21 , a structural layer claim 21 , and combinations thereof.23. The multilayer film of wherein at least one layer or the second layer includes a material selected from the group consisting of foil claim 22 , nylon claim 22 , ethylene/vinyl alcohol (EVOH) copolymers claim 22 , polyvinylidene chloride (PVDC) claim 22 , polyethylene terephthalate (PET) claim 22 , oriented polypropylene (OPP) claim 22 , ethylene/vinyl acetate (EVA) copolymers claim 22 , ethylene/acrylic add (EAA) copolymers claim 22 , ethylene/methacrylic add (EMAA) copolymers claim 22 , linear low density polyethylene (LLDPE) claim 22 , high density polyethylene (HDPE) claim 22 , low density polyethylene (LDPE) claim 22 , nylon claim 22 , graft adhesive polymers (e.g. claim 22 , maleic anhydride grafted polyethylene) claim 22 , and paper.24. The multilayer film of comprising from 2 to 7 layers.25. The multilayer film of wherein one of the layers is a coextruded layer.26. The multilayer film of wherein one of the layers is a laminated layer.27. The multilayer film of wherein the multilayer film has a thickness from 0.1 mil to 50 mils.28. The multilayer film of wherein the ethylene/α-olefin multi-block interpolymer: {'br': None, 'i': T', 'd', 'd, 'sub': 'm', 'sup': '2', '>−2002.9+4538.5()−2422.2(); or'}, '(a) has a Mw/Mn from 1.7 to 3.5, at least one melting point, Tm, in degrees Celsius, and a ...

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10-03-2016 дата публикации

An ethylene/alpha-olefin interpolymer composition

Номер: US20160068667A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides an ethylene/alpha-olefin interpolymer composition suitable for blown film applications, and blown films made therefrom. The ethylene/alpha-olefin interpolymer composition suitable for blown film applications according to the present invention comprises greater than 80 percent by weight of units derived from ethylene and 20 percent or less by weight of units derived from one or more alpha olefin co-monomers, wherein said ethylene/alpha-olefin interpolymer has a density in the range of from 0.910 to 0.918 g/cm 3 , a melt index I 2 in the range of from 0.5 to 1.1 g/10 minutes, a melt flow ratio I 10 /I 2 in the range of from 8 to 10, a melt strength in the range of from 3 to 6 cN, a highest temperature fraction in the range of from 11 to 14 percent determined by CEF, a highest peak temperature fraction by CEF in range of from 96 to 100° C., and a lowest temperature fraction from CEF in the range of from 2 to 5 percent, and a DSC heat curve having three melting peaks with a highest temperature melting peak in the range of from 120 to 124° C., a crystallinity in the range of from 40 to 50 percent.

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18-03-2021 дата публикации

DUAL REACTOR SOLUTION PROCESS FOR THE PRODUCTION OF MULTIMODAL ETHYLENE-BASED POLYMER

Номер: US20210079138A1
Принадлежит: Dow Global Technologies LLC

Embodiments of a method for producing a multimodal ethylene-based polymer having a first, second, and third ethylene-based component, wherein the multimodal ethylene based polymer results when ethylene monomer, at least one C-Ccomonomer, solvent, and optionally hydrogen pass through a first solution, and subsequently, a second solution polymerization reactor. The first solution polymerization reactor or the second solution polymerization reactor receives both a first catalyst and a second catalyst, and a third catalyst passes through either the first or second solution polymerization reactors where the first and second catalysts are not already present. Each ethylene-based component is a polymerized reaction product of ethylene monomer and C-Ccomonomer catalyzed by one of the three catalysts. 1. A method for producing a multimodal ethylene-based polymer comprising:{'sub': 3', '12, 'passing ethylene monomer, at least one C-Ccomonomer, solvent, and optionally hydrogen in both a first solution polymerization reactor, and a second solution polymerization reactor,'} 'and wherein a third catalyst is passed to the other of the first or second solution polymerization reactors in which the first and second catalysts are not present;', 'wherein the first solution polymerization reactor or the second solution polymerization reactor receives both a first catalyst and a second catalyst,'} [{'sub': 3', '12', '1, 'the first ethylene-based component is a polymerized reaction product of ethylene monomer and C-Ccomonomer catalyzed by the first catalyst, the first ethylene-based component having a first density (ρ);'}, {'sub': 3', '12', '2, 'the second ethylene-based component is a polymerized reaction product of ethylene monomer and C-Ccomonomer catalyzed by the second catalyst, the second ethylene-based component having a second density (ρ); and'}, {'sub': 3', '12', '3, 'the third ethylene-based component is a polymerized reaction product of ethylene monomer and C-Ccomonomer ...

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18-03-2021 дата публикации

MULTIMODAL ETHYLENE-BASED POLYMER PROCESSING SYSTEMS AND METHODS

Номер: US20210079139A1
Принадлежит: Dow Global Technologies LLC

Embodiments of methods for producing a trimodal polymer in a solution polymerization process comprise three solution polymerization reactors organized in parallel or in series. 1. A method of producing a trimodal polymer in a solution polymerization process comprising:{'sub': 3', '12', '1', 'w(GPC),1, 'introducing at least one catalyst, ethylene monomer, at least one C-Cα-olefin comonomer, solvent, and optionally hydrogen to a first solution polymerization reactor to produce an effluent comprising a first ethylene-based component, wherein the first ethylene-based component has a density (ρ) of 0.870 to 0.910 g/cc, and a weight-average molecular weight (M) of 150 to 350 kg/mol as measured according to Gel Permeation Chromatography (GPC);'}{'sub': 3', '12', '2', 'w(GPC),2, 'introducing the first ethylene-based component, at least one catalyst, ethylene monomer, at least one C-Cα-olefin comonomer, solvent, and optionally hydrogen to a second solution polymerization reactor downstream from the first solution polymerization reactor to produce an effluent comprising the first ethylene-based component and a second ethylene-based component, wherein the second ethylene-based component has a density (ρ) from 0.895 to 0.925 g/cc, and a weight-average molecular weight (M) from 120 to 170 kg/mol; and'}{'sub': 3', '12', '3', 'w(GPC),3, 'introducing the first ethylene-based component, the second ethylene-based component, at least one catalyst, ethylene monomer, at least one C-Cα-olefin comonomer, solvent, and optionally hydrogen to a third solution polymerization reactor downstream from the second solution polymerization reactor to produce an effluent comprising the trimodal polymer, wherein the trimodal polymer comprises the first ethylene-based component, the second ethylene-based component, and a third ethylene-based component, wherein the third ethylene-based component has a density (ρ) of 0.920 to 0.980 g/cc, and a weight-average molecular weight (M) of 18 to 60 kg/mol;'} ...

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22-03-2018 дата публикации

Resin compositions for extrusion coating

Номер: US20180079897A1
Принадлежит: Dow Global Technologies LLC

Polyethylene-based compositions are provided that can be used, for example, in the formation of film layers. In one aspect, a composition comprises (a) a first linear low density polyethylene having a density of 0.900 to 0.915 g/cm 3 and a melt index (I 2 ) of 5.0 to 25 g/10 min, wherein the linear low density polyethylene is a blend of at least two components: (i) 20-40% by weight of a second linear low density polyethylene, wherein the second linear low density polyethylene is a homogeneously branched ethylene/α-olefin interpolymer having a density of 0.870-0.895 g/cm 3 and a melt index (I 2 ) of 2.0-6.0 g/10 min; and (ii) 60-80% by weight of a third linear low density polyethylene, wherein the density of the third linear low density polyethylene is at least 0.02 g/cm 3 greater than the density of the second linear low density polyethylene and wherein the melt index (I 2 ) of the third linear low density polyethylene is at least twice the melt index (I 2 ) of the second linear low density polyethylene.

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31-03-2022 дата публикации

MODIFIED ZIEGLER-NATTA (PRO) CATALYSTS AND SYSTEM

Номер: US20220098341A1
Принадлежит: Dow Global Technologies LLC

A modified Ziegler-Natta procatalyst that is a product mixture of modifying an initial Ziegler-Natta procatalyst with a molecular (pro)catalyst, and optionally an activator, the modifying occurring before activating the modified Ziegler-Natta procatalyst with an activator and before contacting the modified Ziegler-Natta procatalyst with a polymerizable olefin. Also, a modified catalyst system prepared therefrom, methods of preparing the modified Ziegler-Natta procatalyst and the modified catalyst system, a method of polymerizing an olefin using the modified catalyst system, and a polyolefin product made thereby. 1. A method of polymerizing an olefin using a modified catalyst system that comprises a product of a reaction of a modified Ziegler-Natta procatalyst with an activator in (C) a saturated or aromatic hydrocarbon liquid , the method comprising contacting at least one polymerizable olefin in a reactor with the modified catalyst system under effective conditions to give a polyolefin product; wherein the modified Ziegler-Natta procatalyst is prepared prior to the contacting step by mixing an initial Ziegler-Natta procatalyst and a molecular (pro)catalyst together in (C) a saturated or aromatic hydrocarbon liquid under modifying conditions comprising a modifying temperature less than 100° C. and a modifying time of at least 1 minute , and optionally an activator , to give the modified Ziegler-Natta procatalyst; wherein the molecular (pro)catalyst is a bis-phenylphenoxy (pro)catalyst.2. The method of (i) wherein the initial Ziegler-Natta procatalyst is (B) a magnesium halide-supported titanium procatalyst; wherein the (B) magnesium halide-supported titanium procatalyst has been prepared by contacting (D) a solid particulate consisting essentially of magnesium halide with (E) titanium tetrachloride in the (C) saturated or aromatic hydrocarbon liquid so as to give the (B) magnesium halide-supported titanium procatalyst; (ii) wherein the bis phenylphenoxy (pro) ...

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26-06-2014 дата публикации

Mono- and multi-layer films and articles made therefrom

Номер: US20140178614A1
Принадлежит: Dow Global Technologies LLC

Mono- and multi-layer films comprising a polyethylene composition which comprises the reaction product of ethylene and optionally one or more alpha olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via a solution polymerization process in at least one reactor; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I 2 , measured according to ASTM D 1238 (2.16 kg@190° C.), from 0.1 to 5 g/10 min; density, measured according to ASTM D-792, from 0.910 to 0.935 g/cc; melt flow ratio, I 10 /I 2 , wherein I 10 is measured according to ASTM D1238 (10 kg@190° C.), from 6 to 7.4; and molecular weight distribution, (M w /M n ) from 2.5 to 3.5 are provided. Also provided are articles made from the mono- and/or multi-layer films.

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08-04-2021 дата публикации

COMPOSITIONS COMPRISING MULTIMODAL ETHYLENE-BASED POLYMERS AND LOW DENSITY POLYETHYLENE (LDPE)

Номер: US20210102051A1
Принадлежит: Dow Global Technologies LLC

Embodiments of polymer compositions and articles comprising such compositions containing at least one LDPE and at least one multimodal ethylene-based polymer having at least three ethylene-based components. 1. A polymer composition comprising:{'sub': '2', 'at least one low density polyethylene (LDPE) having a density of 0.916 to 0.940 g/cc measured according to ASTM D792 and a melt index (I) from 0.1 to 10.0 g/10 min when measured according to ASTM D1238 at a load of 2.16 kg and temperature of 190° C.;'}{'sub': 2', '3', '12, 'claim-text': [{'sub': 'w(GPC)', 'the first ethylene-based component has a density of 0.870 to 0.915 g/cc, and a weight-average molecular weight (M) from 163,000 g/mol to 363,000 g/mol as measured according to gel permeation chromatography (GPC), the multimodal ethylene-based polymer comprising at least 20% by weight of the first ethylene-based component;'}, {'sub': 'w(GPC)', 'claim-text': 'the third ethylene-based component has a density greater than the density of the second ethylene-based component.', 'the second ethylene-based component has a density greater than the density of the first ethylene-based component and less than 0.940 g/cc, and a weight-average molecular weight (M) from 88,500 g/mol to 363,000 g/mol as measured according to GPC; and'}], 'at least one multimodal ethylene-based polymer having a density from 0.900 to 0.940 g/cc and a melt index (I) from 0.1 to 10 g/10 min, the multimodal ethylene-based polymer comprising a first ethylene-based component, a second ethylene-based component, and a third ethylene-based component, wherein each of the first ethylene-based component, the second ethylene-based component, and the third ethylene-based component are polymerized reaction products of ethylene monomer and at least one C-Cα-olefin comonomer, wherein2. The polymer composition of claim 1 , wherein the first ethylene-based component and the second ethylene-based component each have a molecular weight distribution (MWD claim 1 , M/( ...

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23-04-2015 дата публикации

POLYETHYLENE BLEND-COMPOSITION SUITABLE FOR BLOWN FILMS, AND FILMS MADE THEREFROM

Номер: US20150108127A1
Принадлежит:

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films comprises the melt blending product of: (a) from 0.5 to 5 percent by weight of a high density polyethylene having a density in the range of from 0.950 to 0.970 g/cm, and a melt flow rate (I) in the range of from less than 0.5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 10 to 40, and Min the range of from 800,000 to 5,000,000 g/mol; (b) 90 percent or greater by weight of a linear low density polyethylene having a density in the range of from 0.910 to 0.950 g/cm, and a melt index (I) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; (e) and optionally one or more anti-oxidants. 1. A polyethylene blend-composition suitable for blown film comprising the melt blending product of:{'sup': '3', 'sub': 2', 'w', 'n', 'z, 'from 0.5 to 5 percent by weight of a high density polyethylene having a density in the range of from 0.950 to 0.970 g/cm, and a melt flow rate (I) in the range of from less than 0.5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 10 to 40, and Min the range of from 800,000 to 5,000,000 g/mol;'}{'sup': '3', 'sub': '2', '90 percent or greater by weight of a linear low density polyethylene having a density in the range of from 0.910 to 0.950 g/cm, and a melt index (I) in the range of from 0.1 to less than or equal to 5 g/10 minutes;'}optionally a hydrotalcite based neutralizing agent;optionally one or more nucleating agents;and optionally one or more antioxidants.2. The polyethylene blend-composition of claim 1 , wherein said linear low density polyethylene is a heterogeneous linear low density polyethylene.3. The polyethylene blend-composition of claim 1 , wherein when said polyethylene blend-composition is ...

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21-04-2016 дата публикации

MULTI-METALLIC ZIEGLER-NATTA PROCATALYSTS AND CATAYSTS PREPARED THEREFROM FOR OLEFIN POLYMERIZATIONS

Номер: US20160108150A1
Принадлежит:

Novel catalyst compositions comprising three or more transition metals are effective in increasing catalyst efficiency, reducing polydispersity, and increasing uniformity in molecular weight distribution when used in olefin, and particularly, linear low density polyethylene (LLDPE), polymerizations. The resulting polymers may be used to form differentiated products including, for example, films that may exhibit improved optical and mechanical properties. 1. A polyethylene polymer prepared having a polydispersity (PDI) of less than 3.5 , a MWCCR in the range of 0.75 to 1.10 , a density in the range of from 0.900 to 0.960 g/cm; a melt index (I) in the range of from 0.1 to 50 g/10 minutes; and , a melt flow ratio (I/I) in the range of from 6 to 10.2. The polyethylene polymer of having a haze per ASTM D1003 of less than 7%.3. The polyethylene polymer of having a Gloss 20 per ASTM D2457 of greater than 106%.4. The polyethylene polymer of having a Gloss 45 per ASTM D2457 of greater than 76%.5. An article comprising the polyethylene polymer of wherein the article is selected from the group consisting of film claim 1 , sheet claim 1 , pipe claim 1 , fiber claim 1 , blow molded articles claim 1 , injection molded articles claim 1 , rotary molded articles. This application is a non-provisional application claiming priority from the U.S. Provisional Patent Application No. 61/491,924 filed on Jun. 1, 2011, entitled “MULTI-METALLIC ZIEGLER-NATTA PROCATALYSTS AND CATALYSTS PREPARED THEREFROM FOR OLEFIN POLYMERIZATIONS,” the teachings of which are incorporated by reference herein, as if reproduced in full hereinbelow.1. Field of the InventionThe invention relates to Ziegler-Natta catalysts useful for olefin polymerizations. More particularly, it relates to multi-metallic Ziegler-Natta catalysts showing improved efficiency and properties in production of ethylene based polymers such as linear low density polyethylene (LLDPE) polymers in particular.2. Background of the ArtCurrently ...

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09-04-2020 дата публикации

POLYMERIZATIONS FOR OLEFIN-BASED POLYMERS

Номер: US20200109224A1
Принадлежит:

The invention provides a process to form an olefin-based polymer, said process comprising polymerizing at least one olefin in the presence of at least one catalyst system comprising the reaction product of the following: 28.-. (canceled)9. The procatalyst of claim 1 , wherein each Z is an oxygen atom.10. The procatalyst of claim 1 , I claim 1 , Rand Rare each carbon atom.11. The procatalyst of claim 1 , L is selected from the following: —CHCHCH— claim 1 , —CHCH— or —CH—.12. The process of claim 1 , wherein for Formula I claim 1 , each (C-C)hydrocarbyl claim 1 , and each (C-C)heterohydrocarbyl is not substituted.13. The procatalyst of claim 1 , wherein for Formula I claim 1 , M is zirconium or hafnium; n is 2; each X claim 1 , independently claim 1 , is a (C-C)hydrocarbyl claim 1 , a (C-C)hetero-hydrocarbyl claim 1 , or a halide; and R claim 1 , R claim 1 , R claim 1 , R claim 1 , R claim 1 , R claim 1 , R claim 1 , R claim 1 , Rand Rare each hydrogen.14. The procatalyst of claim 1 , wherein for Formula I claim 1 , M is zirconium; and each Z is an oxygen atom. The present application claims the benefit of U.S. Provisional Application No. 62/018,855, filed Jun. 30, 2014, and incorporated herein by reference.Olefin-based polymers such as ethylene-based polymers and/or propylene-based polymers are produced via various polymerization processes. Ethylene-based polymers, such as, polyethylene is known for use in the manufacture of a wide a variety of articles. The polyethylene polymerization process can be varied in a number of ways to produce a wide variety of resultant polyethylene resins, having different physical properties that render the various resins suitable for use in different applications. It is generally known that ethylene-based polymers can be produced in solution phase loop reactors, in which ethylene monomer, and optionally one or more alpha olefin comonomers, typically having from 3 to 10 carbon atoms, are circulated in the presence of one or more ...

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14-05-2015 дата публикации

POLYETHYLENE BLEND-COMPOSITION SUITABLE FOR BLOWN FILMS, AND FILMS MADE THEREFROM

Номер: US20150132514A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films comprises the melt blending product of: (a) from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm, and a melt index (I) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 6 to 10; (b) 90 percent or greater by weight of an ethylene/α-olefin interpolymer composition, wherein ethylene/α-olefin interpolymer composition has a Comonomer Distribution Constant (CDC) in the range of from 75 to 200, a vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene/α-olefin interpolymer composition; a zero shear viscosity ratio (ZSVR) in the range from 2 to 20; a density in the range of from 0.903 to 0.950 g/cm, a melt index (1) in a range of from 0.1 to 5 g/10 minutes, a molecular weight distribution (M/M) in the range of from 1.8 to 3.5; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; (e) and optionally one or more antioxidants. 1. A polyethylene blend-composition suitable for blown film comprising the melt blending product of:{'sup': '3', 'sub': 2', 'w', 'n, 'from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm, and a melt index (I) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M/M) in the range of from 6 to 10;'}{'sup': '3', 'sub': 2', 'w', 'n, '90 percent or greater by weight of an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 75 to 200, a vinyl unsaturation of less than 0.15 vinyls per one thousand carbon atoms present in the backbone of the ...

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11-05-2017 дата публикации

BLOWN FILMS WITH IMPROVED TOUGHNESS

Номер: US20170129229A1
Принадлежит:

Blown films formed from polyethylene are provided that can have desirable properties. In one aspect, a blown film comprises a layer formed from a composition comprising a first composition, wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9, and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log(I2). 1. A blown film comprising a layer formed from a composition comprising a first composition , wherein the first composition comprises at least one ethylene-based polymer and wherein the first composition comprises a MWCDI value greater than 0.9 , and a melt index ratio (I10/I2) that meets the following equation: I10/I2≧7.0−1.2×log(I2).2. The blown film of claim 1 , wherein the first composition has a MWCDI value less than claim 1 , or equal to claim 1 , 10.0.3. The blown film of claim 1 , wherein the first composition has a ZSVR value from 1.2 to 3.0.4. The blown film of claim 1 , wherein the first composition has a melt index ratio I10/I2 less than claim 1 , or equal to claim 1 , 9.2.5. The blown film of claim 1 , wherein the first composition has a vinyl unsaturation level greater than 10 vinyls per 1 claim 1 ,000 claim 1 ,000 total carbons.6. The blown film of claim 1 , wherein the layer further comprises a second polymer and the second polymer is selected from the following: a LLDPE claim 1 , a VLDPE claim 1 , a LDPE claim 1 , a MDPE claim 1 , a HDPE claim 1 , a HMWHDPE claim 1 , a propylene-based polymer claim 1 , a polyolefin plastomer claim 1 , a polyolefin elastomer claim 1 , an olefin block copolymer claim 1 , an ethylene vinyl acetate claim 1 , an ethylene acrylic acid claim 1 , an ethylene methacrylic acid claim 1 , an ethylene methyl acrylate claim 1 , an ethylene ethyl acrylate claim 1 , an ethylene butyl acrylate claim 1 , a polyisobutylene claim 1 , a maleic anhydride-grafted polyolefin claim 1 , an ionomer of any of the ...

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31-07-2014 дата публикации

LONG CHAIN BRANCHED (LCB), BLOCK, OR INTERCONNECTED COPOLYMERS OF ETHYLENE IN COMBINATION WITH ONE OTHER POLYMER

Номер: US20140213735A1
Принадлежит: Dow Global Technologies LLC

An ethylenic polymer comprising amyl groups from about 0.1 to about 2.0 units per 1000 carbon atoms as determined by Nuclear Magnetic Resonance and both a peak melting temperature, T, in ° C., and a heat of fusion, H, in J/g, as determined by DSC Crystallinity, where the numerical values of Tand Hcorrespond to the relationship T≧(0.2143*H)+79.643. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 95° C. or greater using a Preparative Temperature Rising Elution Fractionation method, where at least one preparative TREF fraction that elutes at 95° C. or greater has a gpcBR value greater than 0.05 and less than 5 as determined by gpcBR Branching Index by 3D-GPC, and where at least 5% of the ethylenic polymer elutes at a temperature of 95° C. or greater based upon the total weight of the ethylenic polymer. 120-. (canceled)21. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 95° C. or greater using a Preparative Temperature Rising Elution Fractionation method , where at least one preparative TREF fraction that elutes at 95° C. or greater has a gpcBR value greater than 0.05 and less than 5 as determined by gpcBR Branching Index by 3D-GPC , and where at least 5 weight percent of the ethylenic polymer elutes at a temperature of 95° C. or greater based upon the total weight of the ethylenic polymer.22. An ethylenic polymer comprising at least one preparative TREF fraction that elutes at 90° C. or greater using a Preparative Temperature Rising Elution Fractionation method , where at least one preparative TREF fraction that elutes at 90° C. or greater has a branching level greater than about 2 methyls per 1000 carbon atoms as determined by Methyls per 1000 Carbons Determination on P-TREF Fractions , and where at least 7.5 weight percent of the ethylenic polymer elutes at a temperature of 90° C. or greater based upon the total weight of the ethylenic polymer.23. An ethylenic polymer comprising at least one ...

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01-09-2022 дата публикации

Polyethylene compositions

Номер: US20220275181A1
Принадлежит: Dow Global Technologies LLC

According to one or more embodiments, a polyethylene composition that is suitable for packaging applications may include a first polyethylene fraction and a second polyethylene fraction. The first polyethylene fraction may have a single peak in a temperature range of 45 C to 87 C in an elution profile via the improved comonomer composition distribution (iCCD) analysis method. The second polyethylene fraction may have a single peak in a temperature range of 95° C. to 120° C. in the elution profile via iCCD analysis. Additional embodiments disclosed herein include articles and films comprising the polyethylene compositions described herein.

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17-05-2018 дата публикации

ETHYLENE-BASED POLYMER COMPOSITIONS FOR IMPROVED EXTRUSION COATINGS

Номер: US20180134881A1
Принадлежит:

The invention provides a composition comprising at least the following: a) a first composition comprising at least one first ethylene-based polymer, formed by high pressure, free-radical polymerization, and wherein the first composition comprises the following properties: a melt index (I2) from 1.0 to 15.0 g/10 min, and density from 0.910 to 0.940 g/cc; b) a second composition comprising at least one second ethylene-based polymer, and wherein the second composition comprises the following properties; a melt index (I2) from 1.0 to 1000 g/10 min, a density greater than 0.940 g/cc; wherein the composition comprises the following properties: melt index (I2) from 2.0 to 20.0 g/10 min, and a density from 0.915 to 0.940 g/cc; and wherein the first composition is present in an amount from 65 to 95 wt %, based on the weight of the composition. 1. A composition comprising at least the following:a) a first composition comprising at least one first ethylene-based polymer, formed by high pressure, free-radical polymerization, and wherein the first composition comprises the following properties: a melt index (I2) from 1.0 to 15.0 g/10 min, and density from 0.910 to 0.940 g/cc;b) a second composition comprising at least one second ethylene-based polymer, and wherein the second composition comprises the following properties; a melt index (2) from 1.0 to 1000 g/10 min, a density greater than 0.940 g/cc;wherein the composition comprises the following properties: melt index (2) from 2.0 to 20.0 g/10 min, and a density from 0.915 to 0.940 g/cc; andwherein the first composition is present in an amount from 65 to 95 wt %, based on the weight of the composition.2. The composition of claim 1 , wherein the melt index (2) ratio of “the second composition” to “the first composition” is from 0.50 to 2.70.3. The composition of claim 1 , wherein the melt index (2) ratio of “the composition” to “the second composition” is from 0.30 to 2.00.4. The composition of claim 1 , wherein the first ...

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28-05-2015 дата публикации

POLYOLEFIN COMPOSITION

Номер: US20150148490A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyolefin composition suitable for packaging applications, films, multilayer structures and packaging devices made therefrom. The polyolefin composition according to the present invention comprises: an ethylene/α-olefin interpolymer composition comprising (a) from 50 to 75 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.908 g/cm, a melt index (I) in the range of from 0.2 to 1 g/10 minutes, and (b) from 25 to 50 percent by weight of a second ethylene/α-olefin copolymer fraction, and wherein said ethylene/α-olefin interpolymer composition has a density in the range of 0.910 to 0.924 g/cm, a melt index (I) in the range of from 0.5 to 2 g/10 minutes, a zero shear viscosity ratio (ZSVR) in the range of from 1.15 to 2.5, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (M/M) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° C. in the range of from 6 to 43. 1. A polyolefin composition suitable for packaging applications comprising:{'sup': '3', 'sub': '2', 'an ethylene/α-olefin interpolymer composition comprising (a) from 50 to 75 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.908 g/cm, a melt index (I) in the range of from 0.2 to 1 g/10 minutes, and (b) from 25 to 50 percent by weight of a second ethylene/α-olefin copolymer fraction,'}{'sup': '3', 'sub': 2', 'w', 'n, 'wherein said ethylene/α-olefin interpolymer composition has a density in the range of 0.910 to 0.924 g/cm, a melt index (I) in the range of from 0.5 to 2 g/10 minutes, a zero shear viscosity ratio (ZSVR) in the range of from 1.15 to 2.5, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (M/M) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° ...

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28-05-2015 дата публикации

POLYOLEFIN COMPOSITION

Номер: US20150148491A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyolefin composition suitable for injection molding applications, and method of making such injection molded articles. The polyolefin composition suitable for injection molding applications comprises: an ethylene/α-olefin interpolymer composition comprising: (a) from 25 to 50 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of from 0.924 to 0.937 g/cm, a melt index (I) in the range of from 0.03 to 0.3 g/10 min, (b) from 50 to 75 percent by weight of a second ethylene homopolymer fraction having a density in the range of from greater than 0.960 g/cm, a melt index (I) in the range of from 100 to 180 g/10 minutes, wherein said ethylene/α-olefin interpolymer composition has a density in the range of from 0.950 to 0.958 g/cm, a melt index (I) in the range of from 1.0 g/10 min to 3.5 g/10 min, a zero shear viscosity ratio (ZSVR) in the range of from 1.01 to 2.5, a molecular weight distribution (M/M) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° C. in the range of from 9 to 50. 1. A polyolefin composition suitable for injection molding applications comprising:{'sup': 3', '3', '3, 'sub': 2', '2', '2', 'w', 'n, 'an ethylene/α-olefin interpolymer composition comprising: (a) from 25 to 50 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of from 0.924 to 0.937 g/cm, a melt index (I) in the range of from 0.03 to 0.3 g/10 min, (b) from 50 to 75 percent by weight of a second ethylene homopolymer fraction having a density in the range of from greater than 0.960 g/cm, a melt index (I) in the range of from 100 to 180 g/10 minutes, wherein said ethylene/α-olefin interpolymer composition has a density in the range of from 0.950 to 0.958 g/cm, a melt index (I) in the range of from 1.0 g/10 min to 3.5 g/10 min, a zero shear viscosity ratio (ZSVR) in the range of from 1.01 to 2.5, a molecular weight distribution (M/M) in the range ...

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15-09-2022 дата публикации

MULTILAYER FILMS THAT INCLUDE AT LEAST FIVE LAYERS AND METHODS OF PRODUCING THE SAME

Номер: US20220288899A1
Принадлежит:

Embodiments of the present disclosure are directed to multilayer films. Embodiments of the multilayer films may include a first layer comprising a first polyolefin, a second layer comprising a second polyolefin, a third layer comprising a third polyolefin, fourth layer comprising a fourth polyolefin, and a fifth layer comprising a fifth polyolefin. The second layer may be positioned between the first layer and the third layer; the third layer may be positioned between the second layer and the fourth layer; and the fourth layer may be positioned between the third layer and the fifth layer. Two or more of the first polyolefin, second polyolefin, third polyolefin, and fourth polyolefin may be the same or different. The third polyolefin may be a polyethylene composition having a density of 0.924 g/cmto 0.936 g/cmand a melt index (I) of 0.25 g/10 minutes to 2.0 g/10 minutes. 1. A multilayer film comprising:a first layer comprising a first polyolefin;a second layer comprising a second polyolefin;a third layer comprising a third polyolefin, wherein the second layer is positioned between the first layer and the third layer;a fourth layer comprising a fourth polyolefin, wherein the third layer is positioned between the second layer and the fourth layer; anda fifth layer comprising a fifth polyolefin, wherein the fourth layer is positioned between the third layer and the fifth layer;wherein two or more of the first polyolefin, the second polyolefin, the third polyolefin, the fourth polyolefin, and the fifth polyolefin are the same or different in composition; and (a) a first polyethylene fraction having a single peak in a temperature range of 45° C. to 87° C. in an elution profile via improved comonomer composition distribution (iCCD) analysis method, wherein a first polyethylene fraction area is an area in the elution profile beneath the single peak of the first polyethylene fraction between 45° C. and 87° C.; and', '(b) a second polyethylene fraction having a single peak in ...

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17-06-2021 дата публикации

MULTILAYER CAST FILMS AND METHODS OF MAKING THEREOF

Номер: US20210178735A1
Принадлежит:

Embodiments disclosed herein include multilayer cast films having a cling layer and a release layer, wherein the cling layer comprises (i) a first polyethylene composition, and (ii) ultra-low density polyethylene, very low density polyethylene, ethylene/alpha-olefin elastomer, propylene-based elastomer, or combinations thereof; and the release layer comprises a second polyethylene composition. 1. A multilayer cast film having a cling layer and a release layer , wherein:the cling layer comprises: [{'sub': '2', '(a) a melt index, I, of greater than 5.0 to 12.0 g/10 min;'}, '(b) a density of 0.905 to 0.920 g/cc;', '(c) a melt flow ratio, I10/I2, of 6.0 to 7.6; and', '(d) a molecular weight distribution, (Mw/Mn) of from 2.6 to 3.5 and, '(i) a first polyethylene composition which comprises the reaction product of ethylene and, optionally, one or more alpha olefin comonomers, wherein the first polyethylene composition is characterized by the following properties(ii) a polymer selected from ultra-low density polyethylene, very low density polyethylene, ethylene/alpha-olefin elastomer, propylene-based elastomer, or combinations thereof; and [{'sub': '2', '(a) a melt index, I, of greater than 5.0 to 12.0 g/10 min;'}, '(b) a density of 0.905 to 0.920 g/cc;', '(c) a melt flow ratio, I10/I2, of 6.0 to 7.6; and', '(d) a molecular weight distribution, (Mw/Mn) of from 2.6 to 4.0., 'the release layer comprises a second polyethylene composition which comprises the reaction product of ethylene and, optionally, one or more alpha olefin comonomers, wherein the second polyethylene composition is characterized by the following properties2. The multilayer cast film of claim 1 , wherein the release layer further comprises a low density polyethylene having a 0.910 to 0.930 g/cc and a melt index of 0.5 to 4.0 g/10 min.3. The multilayer cast film of claim 1 , wherein the first polyethylene composition and the second polyethylene composition is formed in the presence of a catalyst composition ...

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14-05-2020 дата публикации

ETHYLENE-BASED POLYMERS AND PROCESSES FOR THE SAME

Номер: US20200148799A1
Принадлежит: Dow Global Technologies LLC

An ethylene-based polymer formed from reacting at least the following: ethylene and at least one asymmetrical polyene, and wherein the reaction takes place in the presence of at least one free-radical initiator; and wherein the at least one asymmetrical polyene is selected from Structure A, as described herein; Structure B, as described herein; or a combination of Structure A and Structure B. 2. The ethylene-based polymer of claim 1 , wherein for Structure A claim 1 , R═H or C1-C3 alkyl claim 1 , and for Structure B claim 1 , R═H or C1-C3 alkyl.3. The ethylene-based polymer of claim 1 , wherein for Structure A claim 1 , R═C1-C3 alkyl claim 1 , and for Structure B claim 1 , R═C1-C3 alkyl.4. The ethylene-based polymer of claim 1 , wherein for Structure A claim 1 , m=1-3 and n=1-3 claim 1 , and for Structure B claim 1 , m=1-3 and n=1-3.5. The ethylene-based polymer of claim 1 , wherein the ethylene-based polymer comprises claim 1 , in polymerized form claim 1 , ethylene and the polyene claim 1 , as the only monomeric structures.7. A composition comprising the ethylene-based polymer of .8. The composition of claim 7 , further comprising at least one other polymer.9. An article comprising at least one component formed from the composition of .10. A process to form the ethylene-based polymer of claim 1 , said process comprising polymerizing ethylene in the presence of the at least one asymmetrical polyene.11. An article comprising at least one component formed from the composition of . This application claims the benefit of U.S. Provisional Application 62/514,071, filed on Jun. 2, 2017.Low density polyethylene is made by two reactor technologies, autoclave and tubular. Autoclave reactors produce higher melt strength LDPE, at a given melt index, than tubular reactors, however autoclave reactors are more costly to build and maintain than tubular reactors. There is a need for ethylene-based polymers that have “autoclave-like melt strength” but polymerized on tubular reactors ...

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04-09-2014 дата публикации

SPUNBOND NONWOVEN FABRICS

Номер: US20140248811A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides nonwoven fabrics and staple or binder fibres prepared from an ethylene-based polymer having a Comonomer Distribution Constant in the range of from greater than from 100 to 400, a vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1 to less than 2; a density in the range of 0.930 to 0. 970 g/cm3, a melt index (12) in the range of from 15 to 30 or from 10 to 50 g/10 minutes, a molecular weight distribution (Mw/Mn) in the range of from 2 to 3.5, and a molecular weight distribution (Mz/Mw) in the range of from less than 2. 1. A non-woven fabric comprising monocomponent fibers prepared from an ethylene-based polymer composition comprising:less than or equal to 100 percent by weight of the units derived from ethylene; andless than 30 percent by weight of units derived from one or more α-olefin comonomers;{'sup': '3', 'sub': 2', 'w', 'n', 'z', 'w, 'wherein said ethylene-based polymer composition is characterized by having a Comonomer Distribution Constant in the range of from greater than from 100 to 400, a vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1 to less than 2; a density in the range of 0.930 to 0. 970 g/cm, a melt index (I) in the range of from 15 to 30 g/10 minutes, a molecular weight distribution (M/M) in the range of from 2 to 3.5, and a molecular weight distribution (M/M) in the range of from less than 2.'}2. The spunbond non-woven fabric according to the claim 1 , wherein said non-woven fabric is a spunbond non-woven fabric.3. The spunbond non-woven fabric according to the claim 1 , wherein said monocomponent fiber withstands a cabin pressures in the range of at least 3000 Pa.4. The spunbond non-woven fabric according to the claim 1 , wherein ...

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29-09-2022 дата публикации

Multilayer films comprising polyethylene and barrier layers and methods of producing the same

Номер: US20220305763A1
Принадлежит: Dow Global Technologies LLC

Embodiments of multilayer films are disclosed comprising a first layer comprising polyethylene, a second layer comprising a first medium density polyethylene; a barrier layer; a third layer comprising a second medium density polyethylene; and a fourth layer comprising polyethylene. The second layer may be positioned between the first layer and the barrier layer. The barrier layer may be positioned between the second layer and the third layer.

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23-06-2016 дата публикации

LOW HAZE POLYETHYLENE POLYMER COMPOSITIONS

Номер: US20160177073A1
Принадлежит:

Embodiments of a polyethylene polymer blend having a melt index (I)<2 g/10 min are provided, wherein the polyethylene polymer blend comprises at least about 50% by wt. of at least one high density polyethylene resin (HDPE) having a density ≧0.950 g/cm3, a melt index (I)<4 g/10 min; a melt flow ratio (I/I)≦9, and a molecular weight distribution (MWD) of about 2 to about 5; and further comprises about 1% to about 20% by wt. of at least one low density polyethylene resin (LDPE) having a density ≦0.930 g/cm3, a melt index (I) of about 0.1 to about 10 g/min, and an MWD>3. 1. A polyethylene polymer blend having a melt index (I)<2 g/10 min , wherein Iis measured according to ASTM D1238 at 190° C. and 2.16 kg load , wherein the polyethylene polymer blend comprises: [{'sup': '3', 'a density ≧0.950 g/cm, when measured according to ASTM D792;'}, {'sub': '2', 'a melt index (I)<4 g/10 min;'}, {'sub': 10', '2', '10, 'a melt flow ratio (I/I)≦9, where Iis measured according to ASTM D1238 at 190° C. and 10 kg load; and'}, 'a molecular weight distribution (MWD) of about 2.0 to about 5, wherein MWD is defined as Mw/Mn with Mw being a weight average molecular weight and Mn being a number average molecular weight; and, 'at least about 50% by wt. of at least one high density polyethylene resin (HDPE) having'}{'sup': '3', 'sub': '2', 'about 1% to about 20% by wt. of at least one low density polyethylene resin (LDPE) having a density ≦0.930 g/cm, a melt index (I) of about 0.1 to about 10 g/min, and a MWD>3.'}2. The polyethylene polymer blend of wherein the polyethylene polymer blend comprises about 2% to about 15% by wt. LDPE.3. The polyethylene polymer blend of wherein the polyethylene polymer blend comprises about 60% to about 98% by wt. HDPE.4. The polyethylene polymer blend of wherein the density of the polyethylene polymer blend ≧0.950 g/cmand the melt flow ratio (I/I) of the polyethylene polymer blend ≦9.5. The polyethylene polymer blend of wherein the melt index (I) of the ...

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21-06-2018 дата публикации

Process for Making Ethylene-Based Polymers Using Carbon-Carbon Free Radical Initiators

Номер: US20180171042A1
Принадлежит: Dow Global Technologies LLC

A composition comprising an ethylene-based polymer is made by a process comprising the steps of: (A) contacting under first polymerization conditions at least ethylene and at least one molecular catalyst to form a first ethylene-based polymer, and (B) contacting under second polymerization conditions the first ethylene-based polymer of (A) with at least additional ethylene and a carbon-carbon free radical initiator of Structure (I): wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are each, independently, hydrogen or a hydrocarbyl group and wherein, optionally, two or more R groups (R 1 , R 2 , R 3 , R 4 , R 5 and R 6 ) form a ring structure, with the proviso that at least one of R 2 and R 5 , and at least one of R 3 and R 6 is a hydrocarbyl group of at least two carbon atoms, to form the composition.

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06-06-2019 дата публикации

BLOWN FILMS HAVING IMPROVED HAZE, AND ARTICLES MADE THEREFROM

Номер: US20190169385A1
Принадлежит: Dow Global Technologies LLC

Disclosed herein is a blown film comprising at least 50 wt. % of a polyethylene composition comprising the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a melt index, I, of from 0.1 to 2 g/10 min; a density of from 0.940 to 0.970 g/cm; a melt flow ratio, I/I, of from 5.5 to 7.2; and a molecular weight distribution (Mw/Mn) of from 2.2 to 3.5. 1. A blown film comprising at least 50 wt. % of a polyethylene composition comprising the reaction product of ethylene and optionally , one or more alpha-olefin comonomers , wherein the polyethylene composition is characterized by the following properties:{'sub': '2', 'a. a melt index, I, of from 0.1 to 2 g/10 min;'}{'sup': '3', 'b. a density of from 0.940 to 0.970 g/cm;'}{'sub': 10', '2, 'c. a melt flow ratio, I/I, of from 5.5 to 7.2; and'}d. a molecular weight distribution (MWD) of from 2.2 to 3.5.2. The blown film of claim 1 , wherein the polyethylene composition has a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms.3. The blown film of wherein the polyethylene composition has a melt index claim 1 , I claim 1 , of from 0.1 to less than 1 g/10 min4. The blown film of claim 1 , wherein the polyethylene composition has a melt index claim 1 , I claim 1 , of from 0.5 to less than 1.5 g/10 min.5. The blown film of claim 1 , wherein the polyethylene composition is formed in the presence of a catalyst composition comprising a multi-metallic procatalyst via solution polymerization in at least one reactor.6. The blown film of claim 5 , wherein the solution polymerization occurs in a single reactor.7. The blown film of claim 1 , wherein the blown film exhibits a total haze value of less than 30% for a 1 mil monolayer blown film.8. The blown film of claim 1 , wherein the blown film is a monolayer film.9. The blown film of claim 1 , wherein the blown film forms one or more layers of a ...

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08-07-2021 дата публикации

ZIEGLER-NATTA CATALYST SYSTEM HAVING A TREATED MAGNESIUM CHLORIDE COMPONENT

Номер: US20210205786A1
Принадлежит: Dow Global Technologies LLC

A procatalyst including a preformed magnesium chloride catalyst support having a surface area of greater than or equal to 100 m/g, a titanium containing component, a chlorinating agent, and a hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+. The hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+ is not vanadium. 1. A procatalyst , comprising:{'sup': '2', 'a preformed magnesium chloride catalyst support having a surface area of greater than or equal to 100 m/g;'}a titanium containing component;a chlorinating agent; anda hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+, wherein the hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+ does not comprise vanadium.2. The procatalyst of claim 1 , wherein the hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+ is an aliphatic hydrocarbon soluble transition metal compound having an oxidation state of greater than or equal to 5+.3. The procatalyst of claim 1 , wherein the preformed magnesium chloride catalyst support has a surface area of greater than or equal to 150 m/g.4. The procatalyst of claim 1 , wherein the preformed magnesium chloride catalyst support is a MgClslurry in a hydrocarbon solvent.5. The procatalyst of claim 4 , wherein the MgClslurry is a reaction product of an alkylmagnesium compound solution in a hydrocarbon solvent and a chloride source without separation of the hydrocarbon solvent.6. The procatalyst of claim 1 , wherein the titanium containing component is titanium chloride.7. The procatalyst of claim 1 , wherein the titanium containing component is TiCl(OR) claim 1 , where R is C-Chydrocarbyl claim 1 , or combinations thereof claim 1 , x=0 claim 1 , 1 claim 1 , 2 claim 1 , 3 claim 1 , or 4.8. The procatalyst of claim 1 , wherein the chlorinating ...

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08-07-2021 дата публикации

ORIENTED POLYETHYLENE FILMS AND A METHOD FOR MAKING THE SAME

Номер: US20210206928A1
Принадлежит: Dow Global Technologies LLC

A first oriented film comprising a first polyethylene composition which comprises: from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an 12 lower than 2 g/10min; and from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than or equal to 0.925 g/cc and an 12 greater than or equal to 2 g/10min; wherein the first polyethylene composition has an 12 from 0.5 to 10 g/10min and a density from 0.910 to 0.940 g/cc is provided. 1. An oriented film comprising a polyethylene composition comprising:75 to less than 100 wt % of a first polyethylene composition and/or a second polyethylene composition; andgreater than 0 to 25 wt % of at least one resin selected from the group consisting of linear low density polyethylene, low density polyethylene, ethylene copolymers, propylene copolymers and high density polyethylene;{'sub': '2', 'wherein the first polyethylene composition comprises from 20 to 50 wt % of a first linear low density polyethylene polymer having a density greater than 0.925 g/cc and an Ilower than 2 g/10 min; and'}{'sub': '2', 'from 80 to 50 wt % of a second linear low density polyethylene polymer having a density lower than 0.925 g/cc and an Igreater than 2 g/10 min;'}{'sub': '2', 'wherein the first polyethylene composition has an Ifrom 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc; and'}{'sub': '2', 'wherein the second polyethylene composition comprises from 50 to 80 wt % of a third linear low density polyethylene polymer having a density greater than 0.925 g/cc and an Iless than 2 g/10 min; and'}{'sub': '2', 'from 50 to 20 wt % of a fourth linear low density polyethylene polymer having a density lower than 0.920 g/cc and an Igreater than 2 g/10 min;'}{'sub': '2', 'wherein the second polyethylene composition has an Ifrom 0.5 to 10 g/10 min and a density from 0.910 to 0.940 g/cc.'}2. The oriented film according to claim 1 , wherein the first ...

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07-07-2016 дата публикации

A POLYOLEFIN COMPOSITION

Номер: US20160194464A1
Принадлежит:

The instant invention provides a polyolefin composition suitable for packaging applications, films, multilayer structures and packaging devices made therefrom. The polyolefin composition according to the present invention comprises: an ethylene/α-olefin interpolymer composition comprising (a) from 50 to 75 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.908 g/cm, a melt index (I) in the range of from 0.2 to 1 g/10 minutes, and (b) from 25 to 50 percent by weight of a second ethylene/α-olefin copolymer fraction, and wherein said ethylene/α-olefin interpolymer composition has a density in the range of 0.910 to 0.924 g/cm, a melt index (I) in the range of from 0.5 to 2 g/10 minutes, a zero shear viscosity ratio (ZSVR) in the range of from 1.15 to 2.5, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (M/M) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° C. in the range of from 6 to 43. 1. A polyolefin composition suitable for packaging applications comprising:{'sup': '3', 'sub': '2', 'an ethylene/α-olefin interpolymer composition comprising (a) from 50 to 75 percent by weight of a first ethylene/α-olefin copolymer fraction having a density in the range of 0.894 to 0.908 g/cm, a melt index (I) in the range of from 0.2 to 1 g/10 minutes, and (b) from 25 to 50 percent by weight of a second ethylene/α-olefin copolymer fraction,'}{'sup': '3', 'sub': 2', 'w', 'n, 'wherein said ethylene/α-olefin interpolymer composition has a density in the range of 0.910 to 0.924 g/cm, a melt index (I) in the range of from 0.5 to 2 g/10 minutes, a zero shear viscosity ratio (ZSVR) in the range of from 1.15 to 2.5, a molecular weight distribution, expressed as the ratio of the weight average molecular weight to number average molecular weight (M/M) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second and 190° ...

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22-07-2021 дата публикации

ZIEGLER-NATTA CATALYST WITH AN ELECTRON DONOR COMPOUND FOR INCREASING POLYMER MOLECULAR WEIGHT

Номер: US20210221924A1
Принадлежит: Dow Global Technologies LLC

A heterogeneous procatalyst includes a preformed heterogeneous procatalyst and a metal-ligand complex. The preformed heterogeneous procatalyst includes a titanium species and a magnesium chloride (MgCl) support. The metal-ligand complex has a structural formula (L)M(Y)(XR), where M is a metal cation; each L is a neutral ligand or (═O); each Y is a halide or (C-C)alkyl; each XRis an anionic ligand in which X is a heteroatom or a heteroatom-containing functional group and Ris (C-C)hydrocarbyl or (C-C) heterohydrocarbyl; n is 0, 1, or 2; m is 0-4; and b is 1-6. The metal-ligand complex is overall charge neutral. The heterogeneous procatalyst exhibits improved average molecular weight capability. A catalyst system includes the heterogeneous procatalyst and a cocatalyst. Processes for producing the heterogeneous procatalyst and processes for producing ethylene-based polymers utilizing the heterogeneous procatalyst are also disclosed. 1. A heterogeneous procatalyst comprising:a titanium species;{'sub': '2', 'sup': '2', 'a preformed MgClsupport with a specific surface area of at least 100 m/g;'}{'sub': x', '3-x', 'y', '4-y, 'sup': 1', '1, 'claim-text': [{'sup': '1', 'sub': 1', '30, 'Ris a (C-C) hydrocarbyl;'}, 'x is 1, 2, or 3; and', 'y is 1, 2, 3, or 4; and, 'a chlorinating agent having a structural formula Al(Cl)(R)or Si(Cl)(R), where{'sub': n', 'm', 'b, 'sup': '2', 'claim-text': M is a metal cation;', 'each L is a neutral ligand or (═O);', {'sub': 1', '20, 'each Y is a halide or (C-C)alkyl;'}, {'sup': 2', '2, 'sub': 1', '20', '1', '20, 'each XRis an anionic ligand in which X is a heteroatom or a heteroatom-containing functional group and Ris (C-C)hydrocarbyl or (C-C)heterohydrocarbyl;'}, 'n is 0, 1, or 2;', 'm is 0, 1, 2, 3, or 4;', 'b is 1, 2, 3, 4, 5, or 6; and', 'the metal-ligand complex is overall charge neutral., 'a metal-ligand complex having a structural formula (L)M(Y)(XR), where2. The heterogeneous procatalyst of claim 1 , wherein the chlorinating agent is ...

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29-07-2021 дата публикации

MULTIMODAL ETHYLENE-BASED POLYMER COMPOSITIONS HAVING IMPROVED TOUGHNESS

Номер: US20210230409A1
Принадлежит: Dow Global Technologies LLC

Embodiments of polymer compositions and articles comprising such compositions contain at least one multimodal ethylene-based polymer having at least three ethylene-based components, wherein the multimodal ethylene-based polymer exhibits improved toughness. 1. A polymer composition comprising:{'sub': 2', '3', '12, 'claim-text': [{'sub': 'w(GPC)', 'the first ethylene-based component has a density of 0.860 to 0.915 g/cc, and a weight-average molecular weight (M) of 128,000 g/mol to 363,000 g/mol, the multimodal ethylene-based polymer comprising at least 20% by weight of the first ethylene-based component;'}, {'sub': 'w(GPC)', 'the second ethylene-based component has a density greater than the density of the first ethylene-based component and less than 0.940 g/cc, and a weight-average molecular weight (M) of 88,500 g/mol to 363,000 g/mol, and'}, 'the third ethylene-based component has a density greater than the density of the second ethylene-based component., 'at least one multimodal ethylene-based polymer having a density from 0.900 to 0.940 g/cc when measured according to ASTM D792 and a melt index (I) from 0.1 to 10 g/10 min when measured according to ASTM D1238 at a load of 2.16 kg and temperature of 190° C., the multimodal ethylene-based polymer comprising a first ethylene-based component, a second ethylene-based component, and a third ethylene-based component, wherein each of the first ethylene-based component, the second ethylene-based component, and the third ethylene-based component are polymerized reaction products of ethylene monomer and at least one C-Cα-olefin comonomer, wherein;'}2. The polymer composition of claim 1 , wherein the first ethylene-based component has a C-Cα-olefin comonomer incorporation of at least 0.5 mol. % claim 1 , and the second ethylene-based component has a C-Cα-olefin comonomer incorporation of at least 0.5 mol. %.3. The polymer composition of claim 1 , wherein the multimodal ethylene-based polymer comprises from 20 to 40% by weight ...

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09-10-2014 дата публикации

Polymerization Process to Make Low Density Polyethylene

Номер: US20140303309A1
Принадлежит: Dow Global Technologies LLC

A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: 112-. (canceled)13. An ethylene-based polymer comprising the following properties: (1) a melt elasticity , in centiNewtons , of less than , or equal to , (8.1×(melt index)) , a melt index greater than 3 g/10 min , and a density from 0.926 to 0.935 g/cm.14. The ethylene-based polymer of in which the melt elasticity claim 13 , in centiNewtons claim 13 , is less than claim 13 , or equal to claim 13 , (9.3×(melt index)).1517-. (canceled)18. The ethylene-based polymer of as a polyethylene homopolymer.19. The ethylene-based polymer of as an ethylene-based interpolymer.20. The ethylene-based polymer of as a low density polyethylene (LDPE).21. The ethylene-based polymer of as a high pressure copolymer selected from the group consisting of ethylene vinyl acetate (EVA) claim 13 , ethylene ethyl acrylate (EEA) claim 13 , and ethylene acrylic acid (EAA).22. A polymeric blend comprising the ethylene-based polymer of .23. A composition comprising the ethylene-based polymer of .24. The composition of comprising two or more ethylene-based polymers of .25. An article comprising at least one component formed from the composition of .26. A coating comprising at least one component formed from the composition of .27. A film comprising at least one component formed from the composition of . This invention relates to ethylene-based polymers, particularly low density polyethylene (LDPE), and polymerization improvements to make LDPE. Notably, the polymerization process involves autoclave reactor(s), preferably operated sequentially with a tubular reactor(s).There are many types of polyethylene made and sold today. One type in particular is made by various suppliers and sold in large quantities. This polyethylene is called high pressure free radical polyethylene (usually called LDPE) and is usually made using a tubular reactor or an autoclave reactor or sometimes a combination. Sometimes polymer ...

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13-08-2015 дата публикации

LINEAR LOW DENSITY POLYETHYLENE COMPOSITION SUITABLE FOR CAST FILM

Номер: US20150225520A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a linear low density polyethylene composition suitable for cast film, films made therefrom, and packaging devices comprising one or more such film layers. The linear low density polyethylene composition suitable for cast film according to the present invention comprises an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 200, for example from 40 to 150, a vinyl unsaturation of less than 0.12 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1.2 to 5, for example from 1.5 to 4; a density in the range of from 0.910 to 0.935, for example from 0.915 to 0.925, g/cm, a melt index (I) in a range of from 1 to 10, for example from 2 to 6 g/10 minutes, a molecular weight distribution (M/M) in the range of from 2 to 3.5. 1. A linear low density polyethylene composition suitable for cast film comprising:{'sup': '3', 'sub': 2', 'w', 'n, 'an ethylene/α-olefin interpolymer composition (LLDPE) having a Comonomer Distribution Constant (CDC) in the range of from 40 to 150, a vinyl unsaturation of less than 0.12 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1.5 to 4; a density in the range of from 0.915 to 0.925 g/cm, a melt index (I) in a range of from 2 to 6 g/10 minutes, a molecular weight distribution (M/M) in the range of from 2 to 3.5.'}2. A cast film comprising:{'sup': '3', 'sub': 2', 'w', 'n, 'a linear low density polyethylene composition comprising an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 150 (40 to 200), a vinyl unsaturation of less than 0.15 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in ...

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12-08-2021 дата публикации

CAST FILMS COMPRISING BIMODAL ETHYLENE-BASED POLYMERS HAVING HIGH MOLECULAR WEIGHT HIGH DENSITY FRACTIONS

Номер: US20210246241A1
Принадлежит: Dow Global Technologies LLC

A cast film inducing a bimodal ethylene-based polymer having a high density fraction (HDF) from 3.0% to 10.0%, an I/Iratio from 5.5 to 7.0, a short chain branching distribution (SCBD) less than or equal to 10° C., a density from 0.910 g/cc to 0.920 g/cc, and a melt index (I) from 1.0 g/10 mins to 8.0 g/10 mins. 1. A cast film comprising a bimodal ethylene-based polymer comprising:a high density fraction (HDF) from 3.0% to 10.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C.;{'sub': 10', '2', '2', '10, 'an I/Iratio from 5.5 to 7.0, wherein Iis a melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and Iis a melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C.;'}a short chain branching distribution (SCBD) less than or equal to 10° C., wherein the short chain branching distribution is measured by CEF full width at half height;a density from 0.910 g/cc to 0.920 g/cc, wherein the density is measured in accordance with ASTM D792, Method B; and{'sub': 2', '2, 'a melt index (I) from 1.0 g/10 mins to 8.0 g/10 mins, wherein the melt index (I) is measured in accordance to ASTM D1238 at 190° C. at 2.16 kg.'}2. The cast film of claim 1 , wherein the bimodal ethylene-based polymer has a density from 0.912 g/cc to 0.918 g/cc.3. The cast film of claim 1 , wherein the bimodal ethylene-based polymer has a melt index (I) from 2.0 g/10 mins to 5.0 g/10 mins.4. The cast film of claim 1 , wherein the bimodal ethylene-based polymer has a zero shear viscosity ratio from 1.1 to 3.0.5. The cast film of claim 1 , wherein the cast film has average ultimate stretch from 250% to 400%.6. The cast film of claim 1 , wherein the cast film has average stretch force at 200% stretch from 30.00 to 40.00 lbs measured at 0.5 mil thickness and 20 inch film width.7. The cast film of claim 1 , wherein the cast film has ...

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12-08-2021 дата публикации

BLOWN FILMS COMPRISING BIMODAL ETHYLENE-BASED POLYMERS HAVING HIGH MOLECULAR WEIGHT HIGH DENSITY FRACTIONS

Номер: US20210246274A1
Принадлежит: Dow Global Technologies LLC

A blown film having a bimodal ethylene-based polymer including a high density fraction (HDF) from 3.0% to 25.0%, an I/Iratio from 5.5 to 7.5, a short chain branching distribution (SCBD) less than or equal to 10 C, a zero shear viscosity ratio from 1.0 to 2.5, a density from 0.902 g/cc to 0.925 g/cc, and a melt index (I) from 0.5 g/10 mins to 2.0 g/10 mins. 1. A blown film comprising a bimodal ethylene-based polymer comprising:a high density fraction (HDF) from 3.0% to 25.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C.;{'sub': 10', '2', '2', '10, 'an I/Iratio from 5.5 to 7.5, wherein Iis a melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and Iis a melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C.;'}a short chain branching distribution (SCBD) less than or equal to 10° C., wherein the short chain branching distribution is measured by CEF full width at half height;a density from 0.902 g/cc to 0.925 g/cc, wherein the density is measured in accordance with ASTM D792, Method B, and{'sub': 2', '2, 'a melt index (I) from 0.5 g/10 mins to 2.0 g/10 mins, wherein the melt index (I) is measured in accordance to ASTM D1238 at 190° C. at 2.16 kg.'}2. The blown film of claim 1 , wherein the bimodal ethylene-based polymer has a density from 0.910 g/cc to 0.920 g/cc.3. The blown film of claim 1 , wherein bimodal ethylene-based polymer has a melt index (I) from 0.7 g/10 mins to 1.8 g/10 mins.4. The blown film of claim 1 , wherein the bimodal ethylene-based polymer has a zero shear velocity ratio from 1.1 to 3.0.5. The blown film of claim 1 , wherein the blown film has average clarity from 97.0% to 99.5% claim 1 , wherein the average clarity is measured using BYK Gardner Haze-gard as specified in ASTM D 1746.6. The blown film of claim 1 , wherein the blown film has average gloss from 50 to 75 ...

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12-08-2021 дата публикации

BIMODAL ETHYLENE-BASED POLYMERS HAVING HIGH MOLECULAR WEIGHT HIGH DENSITY FRACTIONS

Номер: US20210246288A1
Принадлежит: Dow Global Technologies LLC

A bimodal ethylene-based polymer, including a high density fraction (HDF) from 3.0% to 25.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C., an I/Iratio from 5.5 to 7.5, wherein Iis the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and Iis the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C., and a short chain branching distribution (SCBD) less than or equal to 10° C., wherein the short chain branching distribution is measured by CEF full width at half height. 1. A bimodal ethylene-based polymer , comprising:a high density fraction (HDF) from 3.0% to 25.0%, wherein the high density fraction is measured by crystallization elution fractionation (CEF) integration at temperatures from 93° C. to 119° C.;{'sub': 10', '2', '2', '10, 'an I/Iratio from 5.5 to 7.5, wherein Iis the melt index when measured according to ASTM D 1238 at a load of 2.16 kg and temperature of 190° C. and Iis the melt index when measured according to ASTM D 1238 at a load of 10 kg and temperature of 190° C.; and'}a short chain branching distribution (SCBD) less than or equal to 10° C., wherein the short chain branching distribution is measured by CEF full width at half height.2. The bimodal ethylene-based polymer of claim 1 , wherein the bimodal ethylene-based polymer has a density from 0.900 g/cc to 0.925 g/cc.3. The bimodal ethylene-based polymer of claim 1 , wherein the bimodal ethylene-based polymer has a melt index (I) from 0.5 g/10 mins to 7.0 g/10 mins.4. The bimodal ethylene-based polymer of claim 1 , wherein the bimodal ethylene-based polymer has a melt index (I) from 2.0 g/10 mins to 4.0 g/10 mins.5. The bimodal ethylene-based polymer of claim 1 , wherein the bimodal ethylene-based polymer has an HDF from 3.0% to 7.5%.6. The bimodal ethylene-based polymer of claim 1 , wherein the bimodal ethylene- ...

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18-07-2019 дата публикации

MAGNESIUM HALIDE-SUPPORTED TITANIUM (PRO)CATALYSTS

Номер: US20190218316A1
Принадлежит:

A magnesium halide-supported titanium procatalyst, a catalyst prepared therefrom, an enhanced catalyst consists essentially of a product of a reaction of the magnesium halide-supported titanium procatalyst and a hydrocarbylaluminoxane. Also methods of preparing the (pro)catalysts, a method of polymerizing an olefin, and a polyolefin made by the polymerization method. 1. An enhanced catalyst that consists essentially of a product of a reaction of (A) a hydrocarbylaluminoxane and a suspension of (B) a magnesium halide-supported titanium procatalyst in (C) a saturated or aromatic hydrocarbon liquid , wherein the (B) magnesium halide-supported titanium procatalyst has been prepared by contacting (D) a solid particulate consisting essentially of magnesium halide with (E) titanium tetrachloride in the (C) saturated or aromatic hydrocarbon liquid so as to give the (B) magnesium halide-supported titanium procatalyst.2. The enhanced catalyst of wherein: (i) the (B) magnesium halide-supported titanium procatalyst is free of Al; (ii) the (B) magnesium halide-supported titanium procatalyst is characterized by a molar ratio of Al/Mg from >0 to <0.05; (iii) the magnesium halide of the (B) magnesium halide-supported titanium procatalyst is magnesium chloride; (iv) the magnesium halide of the (B) magnesium halide-supported titanium procatalyst is magnesium bromide; (v) both (i) and (iii); (vi) both (i) and (iv); (vii) both (ii) and (iii); (viii) both (ii) and (iv).3. The enhanced catalyst of wherein: (i) the (D) solid particulate consisting essentially of magnesium halide has a Brunauer claim 1 , Emmett claim 1 , Teller (BET) surface area of ≥200 square meters per gram (m/g) as measured by BET Surface Area Method; or (ii) the (D) solid particulate consisting essentially of magnesium halide has been prepared by contacting a solution of (F) a dialkylmagnesium compound dissolved in the (C) saturated or aromatic hydrocarbon liquid with 1.95 to 2.05 mole equivalents of hydrogen halide ...

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19-08-2021 дата публикации

PROCESS FOR THE PRODUCTION OF BIMODAL ETHYLENE-BASED POLYMERS HAVING HIGH MOLECULAR WEIGHT HIGH DENSITY FRACTIONS

Номер: US20210253757A1
Принадлежит: Dow Global Technologies LLC

A method of producing bimodal ethylene-based polymer includes reacting ethylene monomer and C-Cα-olefin comonomer in the presence of a first catalyst in an agitated reactor to produce a first polymer fraction, and outputting effluent from the agitated reactor. A second catalyst is added to the effluent downstream of the agitated reactor and upstream from a non-agitated reactor, the second catalyst facilitates production of a second polymer fraction having a density and melt index (I) different from the first polymer fraction. The second catalyst and effluent are mixed in at least one mixer. The second catalyst, second polymer fraction, and the first polymer fraction are passed to the non-agitated reactor; and additional ethylene monomer, additional C-Cα-olefin comonomer, and solvent are passed to the non-agitated reactor to produce more second polymer fraction and thereby the bimodal ethylene-based polymer. 1. A method of producing bimodal ethylene-based polymer comprising:{'sub': 3', '12, 'reacting ethylene monomer and C-Cα-olefin comonomer in solvent in the presence of a first catalyst in an agitated solution polymerization reactor to produce a first polymer fraction;'}{'sub': 3', '12, 'outputting effluent from the agitated solution polymerization reactor, wherein effluent comprises the first polymer fraction, unreacted ethylene monomer, and unreacted C-Cα-olefin comonomer;'}{'sub': 3', '12', '2, 'adding a second catalyst to the effluent downstream of the agitated solution polymerization reactor and upstream from a non-agitated solution polymerization reactor, wherein the second catalyst facilitates further reaction of the unreacted ethylene monomer and unreacted C-Cα-olefin comonomer to produce a second polymer fraction having a density and melt index (I) different from the first polymer fraction and the second catalyst and effluent mix in at least one mixer downstream from the agitated solution polymerization reactor and upstream of the non-agitated solution ...

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26-08-2021 дата публикации

Ethylene-Based Polymers with Improved Melt Strength and Thermal Stability

Номер: US20210261702A1
Принадлежит:

An ethylene-based polymer formed from reacting at least the following: ethylene and at least one asymmetrical polyene, of Structure 1, as described herein. 143-. (canceled)46. The ethylene-based polymer of claim 45 , wherein the ethylene-based polymer has a z-average molecular weight (Mz) from 800 claim 45 ,000 g/mole to 1 claim 45 ,200 claim 45 ,000 g/mole.47. The ethylene-based polymer of claim 46 , wherein the ethylene-based polymer has a melt strength (MS) from greater than or equal to 10 cN to less than or equal to 40 cN (at 190° C.).48. The ethylene-based polymer of claim 47 , wherein the ethylene-based polymer has a weight average molecular weight (Mw) from 145 claim 47 ,000 to 175 claim 47 ,000 g/mole.49. The ethylene-based polymer of claim 48 , wherein the ethylene-based polymer has a molecular weight distribution (MWD) 8.0 to 12.50. The ethylene-based polymer of claim 47 , wherein the polymer has a melt index (I2) from 5.0 g/10 min to 10 g/10 min.51. The ethylene-based polymer of claim 47 , wherein the ethylene-based polymer has a melt index (ho) from 50 g/10 min to 90 g/10 min.52. The ethylene-based polymer of claim 51 , wherein the ethylene-based polymer has a melt index ratio (110/12) from 9.0 to 13.53. The ethylene-based polymer of claim 47 , wherein the ethylene-based polymer has a melt strength to melt index ratio (MS/I) from 2.0 to 4.0.54. The ethylene-based polymer of claim 47 , wherein the polymer has a density from 0.905 g/cc to 0.935 g/cc.55. The ethylene-based polymer of claim 47 , wherein the ethylene-based polymer comprises claim 47 , in reacted from greater than or equal to 0.01 wt % to less than or equal to 0.20 wt % of the asymmetrical polyene claim 47 , based on the weight of the ethylene-based polymer.56. The ethylene-based polymer of claim 47 , wherein the ethylene-based polymer has a detected oxygenated species (OS) rank less than or equal to 2 and a total volatile organic compounds (VOC) rank less than or equal 2.58. The process of ...

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17-09-2015 дата публикации

Sealant Composition

Номер: US20150259586A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyolefin composition suitable for sealant applications, sealant compositions, method of producing the same, and films and multilayer structures made therefrom. The polyolefin composition suitable for sealant applications according to the present invention comprises: an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 110, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range of from 1.01 to 2.0; a density in the range of from 0.908 to 0.922 g/cm 3 , a melt index (I 2 at 190° C./2.16 kg) in the range of from 0.5 to 5.0g/10 minutes, a molecular weight distribution (defined as the weight average molecular weight divided by the number average molecular weight, M w /M n ) in the range of from 2.0 to 4.0, and tan delta at 0.1 radian/second, determined at 190 ° C., in the range of from 5 to 50.

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08-08-2019 дата публикации

MODIFIED ZIEGLER-NATTA (PRO) CATALYSTS AND SYSTEM

Номер: US20190241686A1
Принадлежит: Dow Global Technologies LLC

A modified Ziegler-Natta procatalyst that is a product mixture of modifying an initial Ziegler-Natta procatalyst with a molecular (pro)catalyst, and optionally an activator, the modifying occurring before activating the modified Ziegler-Natta procatalyst with an activator and before contacting the modified Ziegler-Natta procatalyst with a polymerizable olefin. Also, a modified catalyst system prepared therefrom, methods of preparing the modified Ziegler-Natta procatalyst and the modified catalyst system, a method of polymerizing an olefin using the modified catalyst system, and a polyolefin product made thereby. 1. A method of polymerizing an olefin using a modified catalyst system that comprises a product of a reaction of a modified Ziegler-Natta procatalyst with an activator in (C) a saturated or aromatic hydrocarbon liquid , the method comprising contacting at least one polymerizable olefin in a reactor with the modified catalyst system under effective conditions to give a polyolefin product; wherein the modified Ziegler-Natta procatalyst is prepared prior to the contacting step by mixing an initial Ziegler-Natta procatalyst and a molecular (pro)catalyst together in (C) a saturated or aromatic hydrocarbon liquid under modifying conditions comprising a modifying temperature less than 100° C. and a modifying time of at least 1 minute , and optionally an activator , to give the modified Ziegler-Natta procatalyst.2. The method of (i) wherein the initial Ziegler-Natta procatalyst is (B) a magnesium halide-supported titanium procatalyst; wherein the (B) magnesium halide-supported titanium procatalyst has been prepared by contacting (D) a solid particulate consisting essentially of magnesium halide with (E) titanium tetrachloride in the (C) saturated or aromatic hydrocarbon liquid so as to give the (B) magnesium halide-supported titanium procatalyst; (ii) wherein the molecular (pro)catalyst consists essentially of a molecular ligand-metal complex (pro)catalyst; or(iii) ...

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08-08-2019 дата публикации

METHOD OF POLYMERIZING AN OLEFIN

Номер: US20190241687A1
Принадлежит: Dow Global Technologies LLC

A method of polymerizing an olefin using a combination of a Ziegler-Natta catalyst and an unsupported molecular catalyst in a same reactor at the same time to give a polyolefin product, and the polyolefin product made by the method. Also, methods of preparing the combination of (pro)catalysts. 1. A method of polymerizing an olefin using a Ziegler-Natta catalyst and an unsupported molecular catalyst in a same reactor at the same time , the method comprising simultaneously contacting at least one polymerizable olefin in the reactor with the Ziegler-Natta catalyst and the unsupported molecular catalyst in a saturated or aromatic hydrocarbon liquid under effective conditions to give a polyolefin product comprising a mixture of a first polyolef in made by a first polymerization reaction catalyzed by the Ziegler-Natta catalyst and a second polyolefin made by a second polymerization reaction catalyzed by the unsupported molecular catalyst.2. The method of wherein the Ziegler-Natta catalyst is either an enhanced Ziegler-Natta catalyst that consists essentially of a product of a first activation reaction of (A) a hydrocarbylaluminoxane and (B) a magnesium halide-supported titanium procatalyst in (C) a saturated or aromatic hydrocarbon liquid; or the Ziegler-Natta catalyst is a magnesium halide-supported titanium catalyst claim 1 , wherein the magnesium halide-supported titanium catalyst is a product of a second activation reaction of (B) a magnesium halide-supported titanium procatalyst with a trialkylaluminum compound; wherein the (B) magnesium halide-supported titanium procatalyst has been prepared by contacting (D) a solid particulate consisting essentially of magnesium halide with (E) titanium tetrachloride in the (C) saturated or aromatic hydrocarbon liquid so as to give the (B) magnesium halide-supported titanium procatalyst; and wherein the unsupported molecular catalyst consists essentially of a product of a third activation reaction of an unsupported molecular ...

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23-09-2021 дата публикации

FILMS HAVING DESIRABLE MECHANICAL PROPERTIES AND ARTICLES MADE THEREFROM

Номер: US20210292528A1
Принадлежит:

Disclosed herein is a film comprising a layer that comprises a polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers, wherein said polyethylene composition is characterized by the following properties: a melt index, I, measured according to ASTM D1238 (2.16 kg, 190 C), of from 0.5 to 10 g/10 min; a density (measured according to ASTM D792) of less than 0.935 g/cm; a melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg, 190 C) of from 6.0 to 7.5; a molecular weight distribution (Mw/Mn) of from 2.8 to 3.9; and a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms, and a low density polyethylene. 1. A film comprising a layer comprising: [{'sub': '2', 'a. a melt index, I, measured according to ASTM D 1238 (2.16 kg, 190° C.), of from 0.5 to 10 g/10 min;'}, {'sup': '3', 'b. a density measured according to ASTM D792 of less than 0.935 g/cm;'}, {'sub': 10', '2', '10, 'c. a melt flow ratio, I/I, wherein Iis measured according to ASTM D1238 (10 kg, 190° C.) of from 6.0 to 7.5;'}, {'sub': w', 'n, 'd. a molecular weight distribution (M/M) of from 2.8 to 3.9; and'}, 'e. a vinyl unsaturation of greater than 0.12 vinyls per one thousand carbon atoms; and, '(a) 50% or more by weight or more of a polyethylene composition comprising the reaction product of ethylene and optionally one or more alpha-olefin comonomers, wherein said polyethylene composition is characterized by the following properties(b) 50% or less by weight of a low density polyethylene.2. The film of claim 1 , wherein the low density polyethylene has a melt index claim 1 , 1 claim 1 , range of from 0.1-5 g/10 min.3. The film of claim 1 , wherein the film comprises from 5-30% by weight of the low density polyethylene.4. The film of claim 1 , wherein the film is a monolayer film.5. The film of claim 1 , wherein the film is a multilayer film.6. The film of claim 1 , wherein the polyethylene composition is ...

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30-07-2020 дата публикации

MODIFIED POLYETHYLENE COMPOSITIONS AND METHOD FOR MAKING THE SAME

Номер: US20200239673A1
Принадлежит:

A method for increasing the melt strength and/or low shear viscosity of a polyethylene resin, the method comprising a) providing a polyethylene composition comprising the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a density ranging from 0.900 g/cmto 0.970 g/cm, a molecular weight distribution (Mw/Mn) ranging from 2.6 to 3.5, and from 0.10 to 0.27 vinyl groups per 1,000 total carbon atoms; b) providing a masterbatch composition comprising a free radical generator and a polyethylene resin, wherein the free radical generator has a half-life at 220 C of less than 200 seconds, and a decomposition energy higher than −250 kJ/mol, and wherein the polyethylene resin has a density ranging from 0.900 g/cmto 0.970 g/cm, melt index ranging from 0.01 g/10 min to 100 g/10 min; and c) reacting the polyethylene composition with the masterbatch composition to form a modified polyethylene composition. 1. A method for increasing the melt strength and/or low shear viscosity of a polyethylene resin , the method comprising:{'sup': 3', '3, 'a) providing a polyethylene composition comprising the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a density ranging from 0.900 g/cmto 0.970 g/cm, a molecular weight distribution (Mw/Mn) ranging from 2.6 to 3.5, and from 0.10 to 0.27 vinyl groups per 1,000 total carbon atoms;'}{'sup': 3', '3, 'b) providing a masterbatch composition comprising a free radical generator and a polyethylene resin, wherein the free radical generator has a half-life at 220° C. of less than 200 seconds, and a decomposition energy higher than −250 kJ/mol, and wherein the polyethylene resin has a density ranging from 0.900 g/cmto 0.970 g/cm, melt index ranging from 0.01 g/10 min to 100 g/10 min; and'}c) reacting the polyethylene composition ...

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22-08-2019 дата публикации

PROCATALYST COMPOSITIONS USEFUL FOR LOW COMONOMER INCORPORATION AND PROCESS FOR PREPARING THE SAME

Номер: US20190256618A1
Принадлежит:

The present disclosure relates to novel procatalyst compositions including a titanium moiety, a magnesium halide support, a hydrocarbon solution in which the magnesium halide support is formed, and an electron donor modifier described herein. The present disclosure further relates to a one-pot process for preparing the novel procatalyst compositions, as well as use of the novel procatalyst compositions in solution processes for polymerization of ethylene and at least one addition polymerizable monomer to form a polymer composition. 2. The procatalyst composition of claim 1 , wherein R is hydrogen.3. The procatalyst composition of claim 1 , wherein at least one X group is a substituted or unsubstituted 4 claim 1 ,6-bis(dialkylamino)-1 claim 1 ,3 claim 1 ,5-triazin-2-yl group.4. The procatalyst composition of claim 1 , wherein at least one X group is a substituted or unsubstituted piperidyl group.5. The procatalyst composition as claimed in any one of to claim 1 , wherein the electron donor modifier having the formula (II) is in oligomeric or polymeric form.6. The procatalyst composition of claim 5 , wherein the electron donor modifier having the formula (II) has a molecular weight of greater than 1000 daltons.7. The procatalyst composition of claim 5 , wherein the electron donor modifier having the formula (II) is a hindered amine light stabilizer.8. The procatalyst composition of claim 5 , wherein the electron donor modifier having the formula (II) is soluble in a hydrocarbon solvent.9. A process for preparing a procatalyst composition comprising the steps of(a) reacting a hydrocarbon-soluble organomagnesium compound or complex thereof in a hydrocarbon solvent with an active non-metallic or metallic halide to form a magnesium halide support;(b) contacting the magnesium halide support and a compound containing titanium to form a supported titanium procatalyst; and{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, '(c) contacting the supported titanium procatalyst with ...

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29-08-2019 дата публикации

Mono- and multi-layer films and articles made therefrom

Номер: US20190263952A1
Принадлежит: Dow Global Technologies LLC

Mono- and multi-layer films comprising a polyethylene composition which comprises the reaction product of ethylene and optionally one or more alpha olefin comonomers in the presence of a catalyst composition comprising a multi-metallic procatalyst via a solution polymerization process in at least one reactor; wherein said polyethylene composition is characterized by one or more of the following properties: a melt index, I 2 , measured according to ASTM D 1238 (2.16 kg @ 190° C.), from 0.1 to 5 g/10 min; density, measured according to ASTM D-792, from 0.910 to 0.935 g/cc; melt flow ratio, I 10 /I 2 , wherein I 10 is measured according to ASTM D1238 (10 kg @ 190° C.), from 6 to 7.4; and molecular weight distribution, (M w /M n ) from 2.5 to 3.5 are provided. Also provided are articles made from the mono- and/or multi-layer films.

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15-10-2015 дата публикации

CATALYST SYSTEMS FOR OLEFIN POLYMERIZATION

Номер: US20150291713A1
Принадлежит:

The instant invention provides procatalysts and catalyst systems for olefin polymerization, olefin based polymers polymerized therewith, and process for producing the same. In one embodiment, the instant invention provides a procatalyst comprising a metal-ligand complex of formula (I). 2. The procatalyst according to wherein Z is O.3. A catalyst system comprising the reaction product of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'one or more procatalysts of ; and'}one or more cocatalysts; wherein the ratio of total number of moles of the one or more metal-ligand complexes of formula (I) to total number of moles of the one or more cocatalysts is from 1:10,000 to 100:1.4. A polymerization process comprising the steps of:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'polymerizing one or more α-olefins in the presence of one or more catalyst systems of under olefin polymerizing conditions; and thereby forming an olefin based polymer.'}5. An olefin based polymer comprising the polymerization reaction product of:{'claim-ref': {'@idref': 'CLM-00003', 'claim 3'}, 'one or more α-olefins in the presence of one or more catalyst systems of under olefin polymerizing conditions.'}6. The procatalyst of wherein and Rand Rare the same.7. The procatalyst of wherein Rand Rare both a (C-C)hydrocarbyl; (C-C)heterohydrocarbyl; Si(R) claim 1 , Ge(R) claim 1 , P(R) claim 1 , N(R) claim 1 , OR claim 1 , SR claim 1 , NO claim 1 , CN claim 1 , CF claim 1 , RS(O)— claim 1 , RS(O)— claim 1 , (R)C═N— claim 1 , RC(O)O— claim 1 , ROC(O)— claim 1 , RC(O)N(R)— claim 1 , (R)NC(O)— or halogen atom.8. A catalyst system comprising the reaction product of:{'claim-ref': {'@idref': 'CLM-00002', 'claim 2'}, 'one or more procatalysts of ; and'}one or more cocatalysts; wherein the ratio of total number of moles of the one or more metal-ligand complexes of formula (I) to total number of moles of the one or more cocatalysts is from 1:10,000 to 100:1.9. An olefin based polymer comprising the ...

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15-10-2015 дата публикации

Polyethylene blend-composition suitable for blown films, and films made therefrom

Номер: US20150291783A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films according to the present invention comprises the melt blending product of: (a) from 0.5 to 6 percent by weight of a bimodal linear low density polyethylene having a density in the range of from 0.935 to 0.970 g/cm 3 , and a melt index (I 2 ) in the range of from 0.3 to 5 g/10 minutes; (b) 90 percent or greater by weight of a monomodal linear low density polyethylene having a density in the range of from 0.910 to 0.950 g/cm3, and a melt index (I 2 ) in the range of from 0.1 to less than or equal to 5 g/10 minutes; (c) optionally from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm3, and a melt index (I 2 ) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M w /M n ) in the range of from 6 to 10; (d) optionally a hydrotalcite based neutralizing agent; (e) optionally one or more nucleating agents; and (f) optionally one or more antioxidants.

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16-12-2021 дата публикации

ZIEGLER-NATTA CATALYSTS FOR THE PRODUCTION OF POLYETHYLENE

Номер: US20210388124A1
Принадлежит: Dow Global Technologies LLC

The heterogeneous procatalyst of this disclosure includes a titanium species; a hydrocarbon soluble transition metal compound having a structure M(OR); a chlorinating agent having a structure A(Cl)(R), and a magnesium chloride component. M of M(OR)is a non-reducing transition metal other than titanium, the non-reducing transition metal being in an oxidation state of +2 or +3. Each Ris independently (C-C)hydrocarbyl or —C(O)R, where Ris (C-C)hydrocarbyl. Subscript z of M(OR)is 2 or 3. Each Rand Rmay be optionally substituted with one or more than one halogen atoms, or one or more than one —Si(R), where each Ris (C-C)hydrocarbyl. A of A(Cl)(R)is aluminum or boron; Ris (C-C)hydrocarbyl; and x is 1, 2, or 3; and a magnesium chloride component. 1. A heterogeneous procatalyst comprising:a titanium species,{'sup': '1', 'sub': 'z', 'claim-text': M is a non-reducing transition metal other than titanium, the non-reducing transition metal being in an oxidation state of +2 or +3;', {'sup': 1', '11', '11, 'sub': 1', '30', '1', '30, 'each Ris independently (C-C)hydrocarbyl or —C(O)R, where Ris (C-C)hydrocarbyl; and'}, 'z is 2 or 3;', {'sup': 1', '11', 'S', 'S, 'sub': 3', '1', '30, 'wherein each Rand Rmay be optionally substituted with one or more than one halogen atoms, or one or more than one —Si(R), where each Ris (C-C)hydrocarbyl;'}], 'a hydrocarbon-soluble transition metal compound having a structure M(OR), where{'sub': x', '3-x, 'sup': '2', 'claim-text': A is aluminum or boron;', {'sup': '2', 'sub': 1', '30, 'Ris (C-C)hydrocarbyl; and'}, 'x is 1, 2, or 3; and, 'a chlorinating agent having a structure A(Cl)(R), wherea magnesium chloride component.2. The procatalyst according to claim 1 , wherein M is chosen from zinc claim 1 , copper claim 1 , cobalt claim 1 , manganese claim 1 , iron claim 1 , or chromium.3. The procatalyst according to claim 1 , wherein M(OR)is aliphatic or cycloaliphatic hydrocarbon-soluble.4. The procatalyst according to claim 1 , wherein the procatalyst ...

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22-10-2015 дата публикации

A polyethylene blend-composition suitable for blown films, and films made therefrom

Номер: US20150299440A1
Принадлежит: Dow Global Technologies LLC

The instant invention provides a polyethylene blend-composition suitable for blown films, and films made therefrom. The polyethylene blend-composition suitable for blown films according to the present invention comprises the melt blending product of: (a) from 0.5 to 4 percent by weight of a low density polyethylene having a density in the range of from 0.915 to 0.935 g/cm 3 , and a melt index (I 2 ) in the range of from greater than 0.8 to less than or equal to 5 g/10 minutes, and a molecular weight distribution (M w /M n ) in the range of from 6 to 10; (b) 90 percent or greater by weight of a linear low density polyethylene composition has a density in the range of 0.900 to 0.935 g/cm 3 , a molecular weight distribution (M w /M n ) in the range of 1.5 to 4.5, a melt index (I 2 ) in the range of 0.1 to 5 g/10 minutes, a molecular weight distribution (M z /M w ) in the range of less than 3, vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of said composition, and a zero shear viscosity ratio (ZSVR) in the range from 1 to less than 2; (c) optionally a hydrotalcite based neutralizing agent; (d) optionally one or more nucleating agents; (e) and optionally one or more antioxidants.

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