Polyethylene composition suitable for the preparation of films and process for preparing the same

A polyethylene composition, in particular suitable for the preparation of films, and a process for preparing the same are described. The polyethylene composition of the invention comprises from 50 to 89% by weight of a first polyethylene component comprising at least one multimodal polyethylene including a plurality of ethylene polymer fractions having distinct molecular weights and comonomer contents, at least one of said plurality of ethylene polymer fractions being prepared by the use of a single site catalyst, and from 50 to 11% by weight of a second polyethylene component comprising a low or medium density polyethylene.

Polyethylene Moulding Composition

A novel polyethylene composition is described. The composition is suitable for manufacturing especially stretched bands or tapes, also coined raffia in the art.

Polymer Compositions for Rotational Molding Applications

A polymer having a density of from about 0.94 g/cm 3 to about 0.96 g/cm 3 and a primary structure parameter 2 (PSP2 value) of greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of equal to or greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A. A polymer having at least one lower molecular weight component and at least one higher molecular weight component and having a PSP2 value of equal to or greater than about 8.5, wherein an article formed from the polymer has an environmental stress crack resistance of greater than about 1000 hours when measured in accordance with ASTM D 1693 condition A.

Heterophasic Polypropylene Resin with Long Chain Branching

Heterophasic polypropylene resin having a MFR (2.16 kg, 230° C.) of at least 1.0 g/1 Omin, determined according to ISO 1133, comprising a propylene random copolymer matrix phase (A), and an ethylene-propylene copolymer rubber phase (B) dispersed within the matrix phase, wherein the heterophasic polypropylene resin has a fraction soluble in p-xylene at 25° C. (XCS fraction) being present in the resin in an amount of 15 to 45 wt % whereby the XCS fraction has an ethylene content of 25 wt % or lower, and a fraction insoluble in p-xylene at 25 0C (XCU fraction), said heterophasic polypropylene resin being characterised by a strain hardening factor (SHF) of 1.7 to 4.0 when measured at a strain rate of 3.0 s −1 and a Hencky strain of 3.0.

Soft polyolefin compositions with improved processability

Soft polyolefin composition with improved processability comprising from 8 to 45% by weight of a polypropylene component (A), from 45 to 82% by weight of a polyolefin component (B), and from 5 to 25% by weight of a butene-1 (co)polymer (C) having a flexural modulus of 60 MPa or less.

Process for the preparation of a multimodal polyolefin polymer with improved hydrogen removal

Process for the preparation of a multimodal polyolefin polymer at temperatures of from 40 to 150° C. and pressures of from 0.1 to 20 MPa in the presence of a polymerization catalyst in a first and a second polymerization reactor connected in series, wherein further polymerization reactors can be connected to said reactors upstream or downstream of said reactors, in which in the first polymerization reactor a first polyolefin polymer is prepared in suspension in the presence of hydrogen and in the second polymerization reactor a second polyolefin polymer is prepared in the presence of a lower concentration of hydrogen than in the first polymerization reactor, comprising a) withdrawing from the first polymerization reactor a suspension of solid polyolefin particles in a suspension medium comprising hydrogen; b) feeding the suspension to a flash drum of a lower pressure than that of the first polymerization reactor; c) vaporizing a part of the suspension medium; d) withdrawing a hydrogen-depleted suspension from the flash drum and feeding it to the second polymerization reactor; e) withdrawing gas from the gas-phase of the flash drum and feeding it to a heat exchanger; f) condensing a part of the gas withdrawn from the flash drum; and g) returning the liquid obtained in the heat exchanger to the polymerization process at a point where suspension is present, and apparatus for preparing a multimodal polyolefin polymer according to the process.

Propylene Polymer Compositions

A propylene polymer composition comprising (percent by weight): A) 65%-85% of a propylene copolymer containing from 2.0% to 5.0% of ethylene derived units having MFR L (Melt Flow Rate according to ASTM 1238, condition L, i.e. 230° C. and 2.16 kg load) from 0.5 to 50 g/10 min and a melting temperature Tm ranging from 146° C. to 155° C.; B) 15%-35%, of a copolymer of ethylene and propylene with from 74% to 87%, of ethylene derived units; the composition having the intrinsic viscosity of the fraction soluble in xylene ranging from 0.8 to 1.2 dl/g preferably from 0.9 to 1.1 dl/g.

High flow and stiff polymer material with good transparency and impact properties

Polypropylene composition having a melt flow rate MFR 2 (230° C.) of equal or above 15 g/10 min comprising: (a) a crystalline polypropylene matrix; (b) an elastomeric propylene copolymer phase having a propylene content in the range of 40 to 80 wt.-%, and an intrinsic viscosity in the range of more than 0.7 to less or equal 2.5 dl/g; (c) a first polyethylene having a density in the range 905 to 925 kg/m3 and melt flow rate MFR 2 (190° C.) of below 30 g/10 min; (d) a second polyethylene having a density of above 915 kg/m 3 , and a melt flow rate MFR 2 (190° C.) of equal or above 30 g/10 min.

Heterophasic propylene copolymers with stiffness/impact/flowability balance

Heterophasic propylene copolymer (HECO) comprising: (a) a polypropylene matrix comprising: (a 1 ) a first propylene homopolymer fraction (PPH1) with a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of >200 to 500 g/10 min, (a 2-1 ) a second propylene homopolymer fraction (PPH2) with a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of >30 to ≦200 g/10 min or, (a 2-2 ) a second propylene homopolymer fraction (PPH2) with a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of >5 to ≦30 g/10 min and, (a 3-1 ) a third propylene homopolymer fraction (PPH3) with a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 0.03 to ≦5 g/10 min, if the second propylene homopolymer fraction is fraction (a 2-1 ) or, (a 3-2 ) a third propylene homopolymer fraction (PPH3) with a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of >30 to ≦200 g/10 min, if the second propylene homopolymer fraction is fraction (a 2-2 ), wherein the polypropylene matrix has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 30 to 500 g/10 min and a xylene cold soluble fraction determined at 23° C. according to ISO 6427 in the range of 0.5 to <2.0 wt %, (b) an elastomeric propylene copolymer dispersed in said matrix, wherein (i) said heterophasic propylene copolymer has a melt flow rate MFR 2 (230° C.) measured according to ISO 1133 in the range of 25 to 200 g/10 min and, (ii) as the amorphous phase (AM) of the cold soluble fraction (XCS) of the heterophasic propylene copolymer has an intrinsic viscosity measured according to ISO 1628-1 (at 135° C. in tetraline) of ≧2.0 dl/g, and a process for its preparation.

Polypropylene with living hinge properties

The present invention relates to a polypropylene which has—a melt flow rate MFR(230° C., 2.16 kg) of at least 13 g/10 min,—an amount of xylene solubles XS of 6.0 wt % or less, and—a crystalline fraction, wherein at least 10% of the crystalline fraction melts the temperature range of from 160 to 170° C., as determined by the stepwise isothermal segregation technique (SIST).

POLYETHYLENE COMPOSITION FOR PIPE APPLICATIONS WITH IMPROVED SAGGING PROPERTIES

The present invention relates to a polyethylene composition comprising, 115-. (canceled)16. A polyethylene composition comprising , a copolymer of ethylene and at least one comonomer selected from alpha-olefins having from three to twelve carbon atoms,', 'wherein the ethylene copolymer comprises a low molecular weight component (A-1) and a high molecular weight component (A-2) with the low molecular weight component (A-1) having a lower weight average molecular weight than the high molecular weight component (A-2),, 'a base resin (A) comprising'}(B) carbon black in an amount of 1.0 to 10 wt % based on the total amount of the polyethylene composition, and(C) optional further additives other than carbon black;{'sup': 3', '3, 'sub': 5', '2.7/210', '747, 'wherein the base resin (A) has a density of equal to or more than 943 kg/mto equal to or less than 957 kg/m, determined according to ISO 1183, and the composition has a melt flow rate MFR(190° C., 5 kg) of equal to or more than 0.12 g/10 min to equal to or less than 0.20 g/10 min, determined according to ISO 1133, a shear thinning index SHIof equal to or more than 80 to equal to or less than 130 and a viscosity at a constant shear stress of 747 Pa, eta, of equal to or more than 700 kPas to equal to or less than 1200 kPas.'}17. The polyethylene composition according to claim 16 , wherein the low molecular weight component (A-1) is an ethylene homopolymer.18. The polyethylene composition according to claim 16 , wherein the low molecular weight component (A-1) has a melt flow rate MFR(190° C. claim 16 , 2.16 kg) of 200 g/10 min to 400 g/10 min claim 16 , determined according to ISO 1133.19. The polyethylene composition according to claim 16 , wherein the high molecular weight component (A-2) is a copolymer of ethylene and a comonomer selected from alpha-olefins having from three to twelve carbon atoms.20. The polyethylene composition according to claim 16 , wherein the weight ratio of the low molecular weight component (A ...

HIGH FLOW POLYOLEFIN COMPOSITION WITH HIGH STIFFNESS AND PUNCTURE RESISTANCE

The present invention relates to a polyolefin composition comprising two heterophasic propylene copolymers which differ in the intrinsic viscosity of their xylene soluble fractions, the heterophasic propylene copolymer mit with the lower intrinsic viscosity is present up to 10 wt.-% in the polyolefin composition. 116-. (canceled)17. A polyolefin composition comprising [{'sub': '2', '(i) a melt flow rate MFR(230° C.) measured according to ISO 1133 in the range of 40.0 to 60.0 g/10 min, and'}, '(ii) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) of at least 15 wt.-%,, '(a) a first heterophasic propylene copolymer (HECO1) having'} '(iii) the intrinsic viscosity (IV) determined according to DIN ISO 1628/1 (in decalin at 135° C.) of the xylene cold soluble (XCS) fraction of the heterophasic propylene copolymer (HECO1) is in the range of 2.5 to 4.3 dl/g, and', 'wherein further'} [{'sub': '2', '(i) said second heterophasic propylene copolymer (HECO2) has a melt flow rate MFR(230° C.) measured according to ISO 1133 in the range of above 1.0 to 8.0 g/10 min;'}, '(ii) the xylene cold soluble (XCS) fraction of the second heterophasic propylene copolymer (HECO2) has an intrinsic viscosity determined according to DIN ISO 1628/1 (in decalin at 135° C.) in the range of more than 3.7 to 9.0 dl/g; and', '(iii) the comonomer content of the xylene cold soluble (XCS) fraction of the second heterophasic propylene copolymer (HECO2) is in the range of 10.0 to 40.0 wt.-%,, '(b) a second heterophasic propylene copolymer (HECO2) comprising a propylene homopolymer (H-PP2) and an elastomeric propylene copolymer (E2), wherein'} the weight ratio of the first heterophasic propylene copolymer (HECO1) and the second heterophasic propylene copolymer (HECO2) [(HECO1)/(HECO2)] is in the range of 9:1 to 200:1; and/or', 'the amount of the second heterophasic propylene copolymer (HECO2) in the polyolefin composition is equal or below 10 wt.-%, based on the total weight of the ...

Polyethylene composition and film

In some embodiments disclosed herein are polyethylene composition including a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of <2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution Mw/Mn of <2.3, a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of less than 75,000 and a molecular weight distribution Mw/Mn of <2.3, and a fourth polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 100,000 to 250,000 and a molecular weight distribution Mw/Mn of >2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition may have a soluble fraction in a CEF analysis of at least 7.5 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of ≥200 MPa (at a film thickness of about 1 mil) and an oxygen transmission rate (OTR) of ≥550 cm3 per 100 inch2 (at a film thickness of about 1 mil). Film made from the polyethylene composition retains much of its dart impact performance on downgauging from a thickness of 1 mil to a thickness of 0.75 mil.

Polyethylene composition and film having high stiffness, outstanding sealability and high permeability

A polyethylene composition includes a first polyethylene which is an ethylene copolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of <2.3, a second polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 15,000 to 100,000, a molecular weight distribution Mw/Mn of >2.3, and a third polyethylene which is an ethylene copolymer or homopolymer having a weight average molecular weight of from 70,000 to 250,000 and a molecular weight distribution Mw/Mn of >2.3, where the first polyethylene has more short chain branching than the second polyethylene or the third polyethylene. The polyethylene composition has a soluble fraction in a CEF analysis of at least 10 weight percent. Film made from the polyethylene composition may have a machine direction 1% secant modulus of ≥200 MPa (at a film thickness of about 1 mil), a seal initiation temperature (SIT) of ≤90° C. (at a film thickness of about 2 mil), an area of hot tack window (AHTW) of ≥160 Newtons·C° (at a film thickness of about 2 mil) and an oxygen transmission rate (OTR) of ≥600 cm3 per 100 inch2 (at a film thickness of about 1 mil).

Bimodal polypropylene random copolymer

The application provides a bimodal polypropylene random copolymer with good response to nucleating agents, increased crystallization temperature, good mechanical and optical properties, as well as low amounts of extractables and good processability in the sense of high Melt Flow Rate. The present invention further relates to articles made thereof, and the use of the bimodal polypropylene random copolymer for specific applications. It also relates to a process for the preparation of said bimodal polypropylene random copolymer.

Process for producing a coated pipe

The present invention deals with a process for producing a coated pipe. The process comprises (i) homopolymerising ethylene or copolymerising ethylene and an α-olefin comonomer in a first polymerisation step in the presence of a polymerisation catalyst to produce a first ethylene homo- or copolymer having a density of from 940 to 980 kg/m 3 and a melt flow rate MFR 2 of from 1 to 2000 g/10 min; (ii) homopolymerising ethylene or copolymerising ethylene and an α-olefin comonomer in a second polymerisation step in the presence of a first ethylene homo- or copolymer to produce a first ethylene polymer mixture comprising the first ethylene homo- or copolymer and a second ethylene homo- or copolymer, said first ethylene polymer mixture having a density of from 940 to 980 kg/m 3 and a melt flow rate MFR 2 of from 10 to 2000 g/10 min; (iii) copolymerising ethylene and an α-olefin comonomer in a third polymerisation step in the presence of the first ethylene polymer mixture to produce a second ethylene polymer mixture comprising the first ethylene polymer mixture and a third ethylene copolymer, said second ethylene polymer mixture having a density of from 915 to 965 kg/m 3 , preferably from 930 to 955 kg/m 3 and a melt flow rate MFR 5 of from 0.2 to 10 g/10 min; (iv) providing a pipe having an outer surface layer; (v) applying a coating composition onto the pipe outer surface layer to form a top coat layer, wherein the coating composition comprises the second ethylene polymer mixture.

PROCESS TO FORM ETHYLENE/ALPHA-OLEFIN INTERPOLYMERS

The invention provides a process to form a “first composition comprising a first ethylene/α-olefin interpolymer and a second ethylene/α-olefin interpolymer,” said process comprising polymerizing a first mixture comprising ethylene, an α-olefin, and optionally a polyene, in a stirred tank reactor to form a first ethylene/α-olefin interpolymer, and transferring at least some of the first ethylene/α-olefin interpolymer to a loop reactor, and polymerizing, therein, a second mixture comprising ethylene, an alpha-olefin, and optionally a polyene, in the presence of the first ethylene/α-olefin interpolymer, to form the “first composition comprising the first ethylene/α-olefin interpolymer and the second ethylene/α-olefin interpolymer.” The invention also provides a polymerization reactor configuration comprising at least the following: a stirred tank reactor followed by a loop reactor. 1. A process to form a “first composition comprising a first ethylene/α-olefin interpolymer and a second ethylene/α-olefin interpolymer ,”said process comprising polymerizing a first mixture comprising ethylene, an α-olefin, and optionally a polyene, in a stirred tank reactor to form a first ethylene/α-olefin interpolymer, andtransferring at least some of the first ethylene/α-olefin interpolymer to a loop reactor, and polymerizing, therein, a second mixture comprising ethylene, an alpha-olefin, and optionally a polyene, in the presence of the first ethylene/α-olefin interpolymer, to form the “first composition comprising the first ethylene/α-olefin interpolymer and the second ethylene/α-olefin interpolymer.”2. The process of claim 1 , wherein the stirred tank reactor is a continuous stirred tank reactor (CSTR).3. The process of claim 1 , wherein the polymerization of the first mixture is a solution polymerization.4. The process of claim 1 , wherein the polymerization of the second mixture is a solution polymerization.5. The process of claim 4 , wherein the ratio of “the solution viscosity of ...

Metallocene-Catalyzed Polyethylene

A metallocene-catalyzed polyethylene resin having a multimodal molecular weight and composition distribution, comprising from 45% by weight to 75% by weight of a low density fraction, said fraction having a density below or equal to 918 g/cm 3 as measured following the method of standard test ISO 1183 at a temperature of 23° C., wherein the density of the polyethylene resin is from 0.920 to 0.945 g/cm 3 , wherein the M w /M n of the polyethylene is of from 2.8 to 6, wherein the melt index MI2 of the polyethylene resin of from 0.1 to 5 g/10 min measured following the method of standard test ISO 1133 Condition D at a temperature of 190° C. and under a load of 2.16 kg; and wherein the composition distribution breadth index (CDBI) of the polyethylene resin is below 70%, as analyzed by quench TREF (temperature rising elution fractionation) analysis.

RANDOM PROPYLENE POLYMER COMPOSITION AND USE IN EXTRUSION BLOW MOULDING

The present invention is directed to a propylene polymer composition comprising at least one propylene copolymer (C-PP), and an α-nucleating agent (NU), wherein the propylene copolymer (C-PP) comprises two propylene copolymer fractions (PP1) and (PP2), wherein propylene copolymer fraction (PP1) is contained in the propylene copolymer (C-PP) in an amount of 30 to 70 wt. % and the propylene copolymer fraction (PP2) is contained in the propylene copolymer (C-PP) in an amount of 70 to 30 wt. %, the comonomer content of propylene copolymer fraction (PP1) is in the range of 0.5 to 2.5 wt.-% and the comonomer content of the propylene copolymer fraction (PP1) is lower compared to the comonomer content of the propylene copolymer fraction (PP2), and the propylene polymer composition has (a) a melt flow rate MFR(230° C.) measured according to according to ISO 1133 of 1 to 5 g/10 min., and (b) a comonomer content of 4.0 to 8.0 wt. %, the comonomer(s) being ethylene and/or at least one Cto Cα-olefin. The above propylene polymer composition has improved impact and optical properties. The invention further provides a method of producing the above propylene polymer composition and an extrusion blow molded article comprising the above propylene polymer composition. 1. A propylene polymer composition comprising at least one propylene copolymer (C-PP) , and an α-nucleating agent (N) , wherein the propylene copolymer (C-PP) comprises two propylene copolymer fractions (PP1) and (PP2) , whereinpropylene copolymer fraction (PP1) is contained in the propylene copolymer (C-PP) in an amount of 30 to 70 wt. % and the propylene copolymer fraction (PP2) is contained in the propylene copolymer (C-PP) in an amount of 70 to 30 wt. %,the comonomer content of propylene copolymer fraction (PP1) is in the range of 0.5 to 2.6 wt.-% and the comonomer content of the propylene copolymer fraction (PP1) is lower compared to the comonomer content of the propylene copolymer fraction (PP2), and the propylene ...

HETEROPHASIC PROPYLENE COPOLYMERS

A polypropylene composition made from or containing: 1. A polypropylene composition comprising:A) from about 50 wt % to about 90 wt %; of a propylene homopolymer having a fraction insoluble in xylene at 25° C., higher than about 90%; and a MFR L (Melt Flow Rate according to ISO 1133, condition L, at 230° C. and 2.16 kg load) from about 0.5 to about 200 g/10 min;B) from about 10 wt % to about 50 wt %; of a copolymer of propylene and ethylene having from about 30.0 wt % to about 70.0 wt %, of ethylene derived units, based upon the total weight of the copolymer;the sum of the amount of component A) and B) being 100;the polypropylene composition having:i) an intrinsic viscosity of the fraction soluble in xylene at 25° C. between about 2.2 to about 4.0 dl/g;ii) a MFR L (Melt Flow Rate according to ISO 1133, condition L, at 230° C. and 2.16 kg load) from about 0.5 to about 100 g/10 min;iii) a xylene soluble fraction ranging from about 20 wt % to about 50 wt %, based upon the total weight of the polypropylene composition;wherein the polypropylene composition being obtained by a two steps polymerization process comprising the steps of:step a) polymerizing propylene to obtain component A) in the presence of a catalyst comprising the product of a reaction between:a) a solid catalyst component comprising Ti, Mg, Cl, and an internal electron donor compound containing from about 0.1 to about 50% wt of Bi with respect to the total weight of the solid catalyst component;b) an alkylaluminum compound and,c) an electron-donor compound (external donor); andstep b) polymerizing propylene and ethylene to obtain component B) in the presence of the polymerization product of step a).2. The polypropylene composition according to wherein component A) ranges from about 60 wt % to about 85 wt %; and component B) ranges from about 15 wt % to about 40 wt %.3. The polypropylene composition according to wherein component B) contains from about 35.0 wt % to about 60.0 wt % of ethylene derived units ...

Polyethylene composition for pipe applications with improved sagging properties

The present invention relates to a polyethylene composition comprising, a base resin (A) comprising a copolymer of ethylene and at least one comonomer selected from alpha-olefins having from three to twelve carbon atoms, wherein the ethylene copolymer comprises a low molecular weight component (A-1) and a high molecular weight component (A-2) with the low molecular weight component (A-1) having a lower weight average molecular weight than the high molecular weight component (A-2), (B) carbon black in an amount of 1.0 to 10 wt % based on the total amount of the polyethylene composition, and (C) optional further additives other than carbon black.

Bimodal polyethylene

Provided are various bimodal polyethylene, including but not limited to a bimodal polyethylene for a pipe having a density of from 0.9340 to 0.9470 gram/cubic centimeters (g/ccm), a melt index (12) of from 0.1 to 0.7 gram/10 minute, a melt flow ratio (121/12) of from 20 to 90. The bimodal polyethylene includes a high molecular weight polyethylene component and a low molecular weight polyethylene component which are a reaction product of a polymerization process performed in a single reactor and that employs a bimodal polymerization catalyst system. The bimodal polymerization catalyst system includes a bimodal catalyst system of bis(2-pentamethylphenylamido)ethyl)amine Zirconium dibenzyl and either (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloride or (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium dimethyl in a 3.0:1 molar ratio; and a trim catalyst of (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)Zirconium dichloridedimethyl in heptane added to adjust melt flow ratio of the bimodal polyethylene.

LOW EFO POLYPROPYLENE COMPOSITION

Polymer composition comprising at least one polypropylene homopolymer and/or random copolymer, up to 15 wt % of at least one polyethylene, optionally at least one elastomer in an amount of 8 to 40 wt % and optionally fillers and/or additives in an amount of up to 45 wt % based on the total weight of the fmal polymer composition with the at least one polyethylene having a density of higher than 940 kg/m3, a content of hexane hot extractables of below 0.80 wt % preferably below 0.60 wt %, most preferably below 0.40 wt % and a copolymer/homopolymer (COHO) ratio measured by Temperature Rising Elution Fraction (TREF) up to 6%. 1. A polymer composition comprising:a) one or more of at least one polypropylene homopolymer or random copolymer,b) from 0.1 up to 15 wt % of at least one polyethylene,c) optionally at least one elastomer in an amount of 8 to 40 wt % andd) optionally one or more of fillers or additives in an amount of up to 45 wt % based on the total weight of the final polymer composition{'sup': '3', 'with the at least one polyethylene having a density of higher than 940 kg/m, a content of hexane hot extractables of below 0.80 wt %, and a copolymer/homopolymer (COHO) ratio measured by Temperature Rising Elution Fraction (TREF) of up to 6%.'}2. The polymer composition according to comprising:a) one or more of at least one polypropylene homopolymer or random copolymer,{'sup': '3', 'b) 5 to 15 wt % of at least one polyethylene having a density of higher than 940 kg/m, a content of hexane hot extractables of below 0.80 wt % and a copolymer/homopolymer ratio (COHO ratio) measured by Temperature Rising Elution Fraction (TREF) up to 6%,'}c) an elastomer in an amount of 10 to 30 wt %,d) up to 30 wt % fillers ande) up to 4 wt % additives, based on the total weight of the final polymer composition.3. The polymer composition according to claim 1 , comprising:a) one or more of at least one polypropylene homopolymer or random copolymer,{'sup': '3', 'b) 5 to 15 wt % of at least ...

Method for producing olefin block polymer using group 4 transition metal complex

A method for producing an olefin block polymer, the method including: polymerizing olefins using a polymerization catalyst (X) and an organometallic compound (C) containing an atom of any of Groups 2, 12, and 13 of the periodic table of the elements, the organometallic compound (C) excluding an activating co-catalyst agent (B), wherein the polymerization catalyst (X) is formed by bringing a transition metal compound (A) into contact with the activating co-catalyst agent (B), the transition metal compound (A) is represented by the following general formula (1), and the activating co-catalyst agent (B) is selected from among an organoaluminumoxy compound (B-1), an organoboron compound (B-2), a zinc co-catalyst component (B-3), and ion-exchange layered silicate (B-4).

POLYETHYLENE COMPOSITION

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same. 16.-. (canceled)7. A method of making a bimodal linear low density polyethylene composition , the method comprising contacting ethylene (monomer) and at least one (C-C)alpha-olefin (comonomer) with a mixture of a bimodal catalyst system and a trim solution in the presence of molecular hydrogen gas (H) and an inert condensing agent (ICA) in one , two or more polymerization reactors under (co)polymerizing conditions , thereby making the bimodal linear low density polyethylene composition; wherein prior to being mixed together the trim solution consists essentially of a (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium complex and an inert liquid solvent and the bimodal catalyst system consists essentially of an activator species , a non-metallocene ligand-Group 4 metal complex and a metallocene ligand-Group 4 metal complex , all disposed on a solid support; and wherein the (co)polymerizing conditions comprise a reaction temperature from 80 degrees (°) to 110° Celsius (C.); a molar ratio of the molecular hydrogen gas to the ethylene (H2/C2 molar ratio) from 0.001 to 0.050; and a molar ratio of the comonomer to the ethylene (Comonomer/C2 molar ratio) from 0.005 to 0.10.8. The method of further described by any one of limitations (i) to (vi): (i) wherein the bimodal catalyst system consists essentially of a bis(2-pentamethylphenylamido)ethyl)amine zirconium complex and (tetramethylcyclopentadienyl)(n-propylcyclopentadienyl)zirconium complex claim 7 , in a molar ratio thereof from 1.0:1.0 to 5.0:1.0 claim 7 , respectively claim 7 , and a methylaluminoxane species claim 7 , all disposed by spray-drying onto the solid support; (ii) wherein the bimodal catalyst system further consists essentially of mineral oil and the solid support is a hydrophobic fumed silica; (iii) wherein the mixture is a suspension of the bimodal catalyst ...

Organopolysiloxane emulsion composition for release paper or release film, method for producing same, and release paper and release film

An organopolysiloxane emulsion composition for release paper or a release film, said composition being produced by dispersing a mixture comprising components (A) to (D) as mentioned below in water: (A) an alkenyl-group-containing diorganopolysiloxane having at least two alkenyl groups per molecule and having a viscosity of 1,000 Pa·s or less at 25° C., in an amount of 100 parts by mass; (B) an organohydrogenpolysiloxane having at least two Si—H groups per molecule and having a viscosity of 1 Pa·s or less at 25° C., in such to an amount that the number of moles of an Si—H group can become 0.5 to 10 times the number of moles of an alkenyl group in the component (A); (C) a curing catalyst, in an amount of 0.01 to 3 parts by mass; and (D) a polyether-modified and/or polyol-modified organosilicon compound, in an amount of 0.01 to 10 parts by mass.

Propylene resin composition, shaped article and propylene polymer

A propylene resin composition includes a propylene polymer (A) satisfying requirements (1) to (3) below: (1) having a number average molecular weight (Mn) measured by gel permeation chromatography (GPC) of 5000 to 22000; (2) having a ratio (Mw/Mn) of a weight average molecular weight (Mw) to a number average molecular weight (Mn) measured by gel permeation chromatography (GPC) being 1.2 to 3.5; and (3) having a proportion of a component eluted at a temperature of not more than −20° C. in temperature rising elution fractionation (TREF) being not more than 3.5 mass %.

Process for preparing a polypropylene composition

The invention relates to a process for producing a polypropylene composition by sequential polymerization the polypropylene composition having an improved balanced combination of high flowability, high stiffness and impact, and high level of optical properties.

Stiff polypropylene composition suitable for primerless painting

The present invention is directed to a polypropylene composition (C), an article comprising the polypropylene composition (C) as well as the use of the polypropylene composition (C) to reduce paintability failure of a molded article.

SOFT POLYPROPYLENE COMPOSITION

The present invention is directed to a new heterophasic propylene copolymer (RAHECO), a process for obtaining said heterophasic propylene copolymer (RAHECO) and a film or a cable insulation comprising the heterophasic propylene copolymer (RAHECO). 2. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the heterophasic propylene copolymer (RAHECO) is free of phthalic acid esters as well as their respective decomposition products.3. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the xylene cold soluble fraction (XCS) has an intrinsic viscosity (IV) determined according to DIN ISO 162/1 (in Decalin at 135° C.) in the range of 1.8 to 3.5 dl/g.4. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the random propylene copolymer (R-PP) has at least one of:{'sub': '2', 'i) before vis-breaking a melt flow rate MFR(230° C./2.16 kg) measured according to ISO 1133 in the range of 1.0 to 4.0 g/10 min, or'}ii) a comonomer content in the range of 5.1 to 17.0 mol-%.6. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the heterophasic propylene copolymer (RAHECO) comprises 60.0 to 85.0 wt.-% claim 1 , based on the total weight of the heterophasic propylene copolymer (RAHECO) claim 1 , of the random propylene copolymer (R-PP) and 15.0 to 40.0 wt.-% claim 1 , based on the total weight of the heterophasic propylene copolymer (RAHECO) claim 1 , of the elastomeric propylene copolymer (E).7. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the comonomers of at least one of: the random propylene copolymer (R-PP) or the comonomers of the elastomeric propylene copolymer (E) are at least one of: ethylene or Cto Cα-olefins.8. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the heterophasic propylene copolymer (RAHECO) has been visbroken.10. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the ...

POLYMER DISPERSIONS

A polymer dispersion is produced by polymerization of at least two different ethylenically unsaturated monomers in at least first and second stages. The polymer produced in the first stage comprises 25 to 60% by weight of the total monomer composition and has a uniform glass transition temperature from −30° C. to 0° C. The polymer produced in the second stage comprises 40 to 75% by weight of the total monomer composition and has a variable monomer composition such that the second stage polymer has a non-uniform glass transition temperature which varies between a first value from −30° to +10° C. and second value of at least +70° C. Any polymer produced in further polymerization stages comprises no more than 10% by weight of the total monomer composition and the glass transition temperature of the hypothetical uniform copolymer produced by the total monomer composition is in the range from 0° C. to 25° C. 1. A polymer dispersion produced by polymerization of at least two different ethylenically unsaturated monomers in at least two stages wherein:the polymer produced in a first stage comprises 25 to 60% by weight of the total monomer composition and has a uniform glass transition temperature from −30° C. to 0° C.;the polymer produced in a second stage comprises 40 to 75% by weight of the total monomer composition and has a variable monomer composition such that the second stage polymer has a non-uniform glass transition temperature which varies between a first value from −30° to +10° C. and second value of at least +70° C.;any polymer produced in further polymerization stages comprises no more than 10% by weight of the total monomer composition; andthe glass transition temperature of the hypothetical uniform copolymer produced by the total monomer composition is in the range from 0° C. to 25° C.2. A polymer dispersion according to with a minimum film forming temperature (MFFT) of equal or less than 5° C.3. A polymer dispersion according to claim 1 , wherein each of the ...

SOFT AND TRANSPARENT PROPYLENE COMPOLYMERS

The present invention is directed to a polypropylene composition (C) comprising a heterophasic propylene copolymer (RAHECO) and a plastomer (PL) as well as a process for the preparation of said polypropylene composition and a film obtained from said polypropylene composition (C). 1. A polypropylene composition (C) , comprisingi) a heterophasic propylene copolymer (RAHECO), said heterophasic propylene copolymer comprising a matrix (M) being a random propylene copolymer (R-PP) and an elastomeric propylene copolymer (E) dispersed in said matrix (M),and{'sub': 4', '20, 'sup': '3', 'ii) a plastomer (PL) being a copolymer of ethylene and at least one Cto Cα-olefin having a density below 0.900 g/cm.'}2. The polypropylene composition (C) according to claim 1 , wherein the polypropylene composition (C) has at least two glass transition temperatures Tg(1) and Tg(2) claim 1 , the first glass transition temperature Tg(1) relates to the matrix (M) while the second glass transition temperature Tg(2) relates to the dispersed elastomeric propylene copolymer (E) claim 1 , wherein further the second glass transition temperature fulfils the inequation (II) claim 1 ,{'br': None, 'i': Tg', 'C, '(2)>9.0−2.0×(XCS)\u2003\u2003(II)'}whereinTg(2) is the second glass transition temperature of the polypropylene composition (C) and C(XCS) is the comonomer content [in mol-%] of the xylene cold soluble fraction (XCS) of the polypropylene composition (C).3. The polypropylene composition (C) according to claim 1 , having at least two glass transition temperatures Tg(1)′ and Tg(2)′ claim 1 , wherein the second glass transition temperature fulfils the inequation (I) claim 1 ,{'br': None, 'i': Tg', 'C, '(2)′>10.0−1.8×(XCS)′\u2003\u2003(I)'}whereinTg(2)′ is the second glass transition temperature of the polypropylene composition (C) and C(XCS)′ is the propylene content [in mol-%] of the xylene cold soluble fraction (XCS) of the polypropylene composition (C).4. The polypropylene composition (C) ...

Multimodal polyethylene composition with high pressure resistance

The present invention relates to a multimodal polyethylene composition which can be manufactured into pipes showing improved pressure resistance comprising a high density multimodal ethylene polymer component (A) having a density of at least 930 kg/m 3 , and a MFR 21 of not more than 15 g/10 min, wherein said composition exhibits a LAOS-NLF defined as L   A   O   S - N   L   F =  G 1 ′ G 3 ′  where G 1 ′—first order Fourier Coefficient G 3 ′—third order Fourier Coefficient of at least 1.7. Such a polyethylene composition is useful for the manufacture of pressure pipes that exhibit improved pressure resistance and creep resistance and do not undergo sagging. Further disclosed is a process for the production of a pipe using such a multimodal polyethylene composition and a pipe comprising such a multimodal polyethylene composition.

HETEROPHASIC PROPYLENE POLYMER MATERIAL AND USE OF THE SAME

Provided is a heterophasic propylene polymer material having excellent low temperature impact resistance, tensile strength, and tensile elongation. A heterophasic propylene polymer material contains a propylene homopolymer component (A), and an ethylene-propylene copolymer component (B1) and an ethylene-propylene copolymer component (B2) having different formulations from each other, wherein a content of the propylene homopolymer component (A), a content of the ethylene-propylene copolymer component (B1), and a content of the ethylene-propylene copolymer component (B2) are 40 to 70 parts by mass, 15 to 54 parts by mass, and 6 to 15 parts by mass, respectively, with respect to 100 parts by mass of a total content of the propylene homopolymer component (A) and the ethylene-propylene copolymer components (B1) and (B2). 1. A heterophasic propylene polymer material comprising a propylene homopolymer component (A) and the following ethylene-propylene copolymer component (B) ,wherein a content of the propylene homopolymer component (A) and a content of the ethylene-propylene copolymer component (B) are 40 to 70 parts by mass and 30 to 60 parts by mass, respectively, with respect to 100 parts by mass of a total content of the propylene homopolymer component (A) and the ethylene-propylene copolymer component (B),the ethylene-propylene copolymer component (B) contains the following ethylene-propylene copolymer component (B1) and the following ethylene-propylene copolymer component (B2),a content of the ethylene-propylene copolymer component (B1) and a content of the ethylene-propylene copolymer component (B2) are 15 to 54 parts by mass and 6 to 15 parts by mass, respectively, with respect to 100 parts by mass of the total content of the propylene homopolymer component (A) and the ethylene-propylene copolymer component (B),the ethylene-propylene copolymer component (B1) contains a monomer unit derived from ethylene and a monomer unit derived from propylene,a content of the ...

POLYETHYLENE COMPOSITION FOR FILMS

A polyethylene composition having the following features: 1. A polyethylene composition comprising:a) an ethylene polymer, wherein the polyethylene composition has a molecular weight and{'sup': '3', '1) a density from about 0.945 to about 0.958 g/cm, determined according to ISO 1183 at 23° C.;'}2) an MIF/MIP ratio from about 20 to about 43, where MIF is the melt flow index at 190° C. with a load of 21.60 kg, and MIP is the melt flow index at 190° C. with a load of 5 kg, both determined according to ISO 1133;3) an MIF from about 4.0 to less than about 8.5 g/10 min.;4) an HMWcopo index from about 3.5 to about 20;5) a long-chain branching index, LCBI, equal to or lower than about 0.82; {'br': None, 'sub': 0.02', 'maxDSC, 'i': '×t', 'HMWcopo=(η)/(10̂5)'}, 'wherein the HMWcopo index is determined according to the following formulawhere{'sub': '0.02', '(i) ηis the complex viscosity of a melt in Pa·s, measured at a temperature of 190° C., in a parallel-plate rheometer under dynamic oscillatory shear mode with an applied angular frequency of 0.02 rad/s;'}{'sub': 'maxDSC', '(ii) tis the time in minutes to reach the maximum value of heat flow of crystallization at a temperature of 124° C. under quiescent conditions, measured in isothermal mode in a differential scanning calorimetry apparatus; and'}{'sub': 'g', '(iii) LCBI is the ratio of the measured mean-square radius of gyration R, measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having a molecular weight, equal to about the molecular weight of the polyethylene composition.'}2. The polyethylene composition of claim 1 , wherein the ethylene polymer is an ethylene copolymer.3. The polyethylene composition of claim 1 , wherein the ethylene polymer was prepared in the presence of -a Ziegler-Natta polymerization catalyst.4. The polyethylene composition of claim 3 , wherein the Ziegler-Natta polymerization catalyst comprises a product of a reaction of:{'sub': '2', 'a) a prepolymerized solid catalyst ...

Hdpe-containing impct modifier polyolefin composition

Polyolefin composition made from or containing: (A) about 5 to about 35% by weight of a propylene-based polymer containing about 90% by weight or more of propylene units and containing about 10% by weight or less of a fraction soluble in xylene at 25° C. (XS A ); (B) about 25 to about 50% by weight, of an ethylene homopolymer containing about 5% by weight or less of a fraction soluble in xylene at 25° C. (XS B ) referred to the weight of (B); and (C) about 30 to about 60% by weight, of a copolymer of ethylene and propylene containing from about 25% to about 75% by weight of ethylene units and containing from about 55% to about 95% by weight, of a fraction soluble in xylene at 25° C. (XS C ). Following progressive fractionation having first, second, and third dissolution temperatures, the composition has about 20% by weight or less collected at second dissolution temperature.

Multistage process for producing low-temperature resistant polypropylene compositions

A process for polymerizing propylene in the presence of a polymerization catalyst by copolymerizing propylene with a comonomer selected from the group of ethylene and C4-C10 alpha-olefins in three polymerization stages. The polymer produced in the first polymerization stage has the highest melt flow rate and the lowest content of comonomer. The polymer produced in the last polymerization stage has the lowest melt flow rate and the highest content of comonomer. The polymer composition produced by the process has good mechanical properties and can be used for making pipes. The process has a good productivity.

LLDPE-CONTAINING IMPACT MODIFIER POLYOLEFIN COMPOSITION

Polyolefin compositions made from or containing: 1. A polyolefin composition comprising:{'sub': A', 'A, '(A) from about 5 to about 35% by weight of a propylene-based polymer containing about 90% by weight or more of propylene units and containing about 10% by weight or less of a fraction soluble in xylene at 25° C. (XS), both the amount of propylene units and of the fraction XSbeing referred to the weight of (A);'}{'sub': 3', '8', 'B', 'B, '(B) from about 25 to about 50% by weight, of a copolymer of ethylene and a C-Calpha-olefin containing from about 0.1% to about 20% by weight of alpha-olefin units and containing about 75% by weight or less of a fraction soluble in xylene at 25° C. (XS), both the amount of ethylene units and of the fraction XSbeing referred to the weight of (B); and'}{'sub': C', 'C, '(C) from about 30 to about 60% by weight, of a copolymer of ethylene and propylene containing from about 25% to about 75% by weight of ethylene units and containing from about 55% to about 95% by weight, of a fraction soluble in xylene at 25° C. (XS), both the amount of ethylene units and of the fraction XSbeing referred to the weight of (C);'}the amounts of (A), (B) and (C) being referred to the total weight of (A)+(B)+(C), wherein, following a progressive fractionation having a first, a second, and a third dissolution temperature (77° C., 100° C., and 130° C.) and the fraction collected at the second dissolution temperature corresponds to the second fractionation step and fraction 2, the composition has about 20% by weight or less of a fraction obtained in the second fractionation step (fraction 2).2. The polyolefin composition according to claim 1 , wherein the propylene-based polymer (A) is present in amount of about 15 to about 25% by weight claim 1 , referred to the total weight of (A)+(B)+(C).3. The polyolefin composition according to claim 1 , wherein the propylene-based polymer (A) is a homopolymer and contains about 5% by weight or less of a fraction soluble ...

HIGH MOLECULAR WEIGHT POLYMERS HAVING IMPROVED CRYSTALLIZATION

This disclosure relates to a high molecular weight polypropylene-based composition with high nucleation density and short crystallization half time. The composition may contain up to about 2 wt % ethylene. 1. A high molecular weight polypropylene-based composition , comprising from 0 to about 2% by weight ethylene;wherein the composition has a melt flow rate of about 1.0 g/10 min or lower; and{'sup': '2', 'wherein the composition has a nucleation density greater than 18,000 nuclei/cm, when nuclei are grown from a melt at 135° C. without the addition of an external nucleating agent, as measured by optical microscopy.'}2. The composition of claim 1 , wherein the composition comprises from about 0.1% to about 1.0% by weight ethylene.3. The composition of claim 1 , wherein the melt flow rate is about 1.0 g/10 min or less.4. The composition of claim 1 , wherein the nucleation density is greater than 100 claim 1 ,000 nuclei/cm.5. The composition of claim 1 , wherein the composition has a crystallization half time of about 24 minutes or shorter claim 1 , when nuclei are grown from a melt at 135° C. claim 1 , as measured by isothermal differential scanning calorimetry.6. The composition of claim 5 , wherein the crystallization half time is about 15 minutes or shorter.7. The composition of claim 1 , wherein the composition has a crystallization half time ranging from about 0.1 minute to about 0.9 minute claim 1 , when nuclei are grown from a melt at 120° C. claim 1 , as measured by isothermal differential scanning calorimetry.8. The composition of claim 7 , wherein the composition comprises from about 0.1% to about 1.0% by weight ethylene.9. A method for preparing the high molecular weight polypropylene-based composition of claim 1 , the method comprising:polymerizing propylene and ethylene, if present, with a Ziegler-Natta catalyst system to form the high molecular weight polypropylene-based composition; andextruding the high molecular weight polypropylene-based composition ...

Polyolefin Compositions

The present invention relates to a polyolefin composition comprising:a) at least one first polyolefin having a multimodal molecular weight distribution and prepared in the presence of at least one metallocene catalyst; andb) at least one second polyolefin having a Mw/Mn of at least 10.0 and a long chain branching index grheo of at least 0.85, wherein said second polyolefin is present in an amount of at least 1.0% by weight based on the total weight of the polyolefin composition; wherein the second polyolefin has a High Load Melt Index of at least 0.60 times the High Load Melt Index HLMI of the first polyolefin and of at most 1.40 times the High Load Melt Index HLMI of the first polyolefin, as measured following the procedure of ISO 1133 condition G using a temperature of 190° C. and a load of 21.6 kg. The present invention also relates to processes for preparing said composition, and articles made therefrom.

MULTIMODAL ETHYLENE-BASED POLYMER COMPOSITIONS HAVING IMPROVED TOUGHNESS

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 ...

BIMODAL HIGH DENSITY POLYETHYLENE

The invention is directed to bimodal polyethylene having a flow ratio FRR ranging between ≥30 and ≤40, a density ranging between ≥949.0 and ≤952.0 kg/m3, an MFRranging between ≥0.1 and ≤0.2 g/10 min and comprising from 50 to 54% by weight of an ethylene homopolymer A and from 46-50% by weight of an ethylene-butene copolymer B, where all percentages are based on the total weight of the composition and wherein ethylene homopolymer A has a viscosity number ≥70 and ≤100 cm3/g and a density between ≥968 and ≤972 kg/m3. The polyethylene is suitable to be applied in the production of pipes. 1. A bimodal polyethylene having a flow ratio FRR ranging between ≥30 and ≤40 , a density ranging between ≥949.0 and ≤952.0 kg/m , an MFRranging between ≥0.1 and ≤0.2 g/10 min and comprising from 50 to 54% by weight of an ethylene homopolymer A and from 46 to 50% by weight of an ethylene-butene copolymer B , where all percentages are based on the total weight of the composition and wherein ethylene homopolymer A has a viscosity number ≥70 and ≤100 cm/g and a density between ≥968 and ≤972 kg/mand wherein the bimodal polyethylene has{'sup': 2', '2, 'impact resistance (according to notched Charpy measurements at 23° C.; ISO 179) ≥30 kJ/mand ≤40 kJ/m,'}{'sup': 2', '2, 'impact resistance (notched Charpy measurements at −30° C.; ISO 179) ≥15 kJ/mand ≤20 kJ/m,'}{'i': 'Polymer', 'strain hardening (measured according to the strain hardening method, based on the publication by Kurelec, L. et al in 2005, 46, p 6369-6379) ≥40 MPa and ≤50 MPa, and'}shear thinning index ≥65 and ≤80.2. The bimodal polyethylene according to characterized in that the density of ethylene homopolymer A ranges between ≥969 and ≤971 kg/m.3. The bimodal polyethylene according to claim 1 , characterized in that the viscosity number of ethylene homopolymer A ranges between ≥77 and ≤90 cm/g.4. The bimodal polyethylene according to claim 1 , characterized in that the density of the bimodal polyethylene ranges between ≥949.0 and ...

COMPOSITE COMPRISING A CELLULOSE-BASED FILLER

Composite comprising a heterophasic propylene copolymer (HECO), a high density polyethylene, a cellulose-based filler and a compatibilizer. 1. A composite comprising(a) 32 to 89 wt.-%, based on the total weight of the composite, of a heterophasic propylene copolymer (HECO) comprising a (semicrystalline) polypropylene (PP) as a matrix in which an elastomeric propylene copolymer (EC) is dispersed;{'sup': '3', '(b) 5.0 to 40 wt.-%, based on the total weight of the composite, of a high density polyethylene (HDPE) having a density in the range of 935 to 970 kg/m;'}(c) 5.0 to 30 wt.-%, based on the total weight of the composite, of a cellulose-based filler (CF); and(d) 1.0 to 8.0 wt.-%, based on the total weight of the composite, of an adhesion promoter (AP),wherein the composite does not comprise(i) a further heterophasic propylene copolymer different to the heterophasic propylene copolymer (HECO) and(ii) a further (semicrystalline) polypropylene different to the (semicrystalline) polypropylene (PP) of the matrix of the heterophasic propylene copolymer (HECO).2. The composite according to consisting of(a) 32 to 89 wt.-%, based on the total weight of the composite, of a heterophasic propylene copolymer (HECO) comprising a (semicrystalline) polypropylene (PP) as a matrix in which an elastomeric propylene copolymer (EC) is dispersed;{'sup': '3', '(b) 5.0 to 40 wt.-%, based on the total weight of the composite, of a high density polyethylene (HDPE) having a density in the range of 935 to 970 kg/m;'}(c) 5.0 to 30 wt.-%, based on the total weight of the composite, of the cellulose-based filler (CF);(d) 1.0 to 8.0 wt.-%, based on the total weight of the composite, of an adhesion promoter (AP), and(e) optionally, one or more of alpha nucleating agents (NU) or additives (A).3. The composite according to consisting of(a) 32 to 89 wt.-%, based on the total weight of the composite, of a heterophasic propylene copolymer (HECO) comprising a (semicrystalline) polypropylene (PP) as a ...

PROCESS FOR PREPARING A POLYPROPYLENE COMPOSITION

The invention relates to a process for producing a polypropylene composition by sequential polymerization the polypropylene composition having an improved balanced combination of high flowability, high stiffness and impact, and high level of optical properties. 1. A process for producing a polypropylene composition by sequential polymerization comprising the steps:{'sub': 4', '10', '2, 'a) polymerizing in a first reactor monomers comprising propylene and optionally one or more comonomers selected from ethylene and C-Calpha-olefins, to obtain a first propylene polymer fraction having a comonomer content in the range of 0.0 to 1.8 wt %, and a MFRin the range of from 15.0 to 40.0 g/10 min, as measured according to ISO 1133 at 230° C. under a load of 2.16 kg;'}{'sub': 4', '10, 'b) polymerizing in a second reactor monomers comprising propylene and one or more comonomers selected from ethylene and C-Calpha-olefins, in the presence of the first propylene polymer fraction, to obtain a second propylene polymer fraction having a comonomer content in the range of 2.0 to 12.0 wt %;'}c) extruding the second propylene polymer fraction in the presence of at least one alpha-nucleating agent;{'sub': '2', 'wherein the polypropylene composition has an MFRin the range of from 15.0 to 60.0 g/10 min, as measured according to ISO 1133 at 230° C. under a load of 2.16 kg;'}wherein the process is operated in the presence of a Ziegler-Natta catalyst with a transition metal of group 4 to 6 of the periodic table and the catalyst comprising an internal donor, wherein the internal donor is a non-phthalic internal donor; andwherein the non-phthalic internal donor is selected from (di)esters of non-phthalic carboxylic (di)acids, wherein the (di)ester belongs to the group consisting of malonates, maleates, citraconates, glutarates, cyclohexene-1,2-dicarboxylates, derivatives thereof, and mixtures thereof.2. The process according to claim 1 , wherein the comonomers are selected from one or more ...

Polypropylene copolymers with improved stiffness and impact behavious

The present invention is directed towards random-heterophasic propylene copolymers with a specific ratio of stiffness to impact balance and specific relation between glass transition temperature and comonomer content. The invention is further directed to articles comprising said random-heterophasic propylene copolymer and their use.

MULTILAYER FILM COMPRISING PROPYLENE-ETHYLENE-1-BUTENE TERPOLYMERS

A multilayer film made from or containing a skin layer made from or containing a polyolefin composition made from or containing: 1. A multilayer film comprising: A) from about 19 wt % to about 50 wt %, based upon the total weight of the polyolefin composition, of a propylene ethylene copolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt %, based upon the total weight of the propylene ethylene copolymer and', 'B) from about 50 wt % to about 81 wt %, based upon the total weight of the polyolefin composition, of a propylene ethylene 1-butene terpolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt %, based upon the total weight of the propylene ethylene 1-butene terpolymer, and 1-butene derived units content of between about 4.8 wt % and about 12.4 wt %, based upon the total weight of the propylene ethylene 1-butene terpolymer;', 'the sum of the amount of component A) and B) being 100;', 'the composition being characterized by the following features:', 'molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than about 4.0;', {'sup': '−4', 'the creep and recovery curve measured on the polymer fuse at 200° C. measured shows a maximum value between 600 and 1200 seconds, lower than about 53×101/Pa.'}], '(a) a polyolefin composition comprising, '(i) a skin layer comprising'}2. The multilayer film according to claim 1 , wherein in the polyolefin composition component A) ranges from about 25 wt % to about 42 wt % claim 1 , based upon the total weight of the polyolefin composition claim 1 , and component B) ranges from about 58 wt % to about 75 wt % claim 1 , based upon the total weight of the polyolefin composition.3. The multilayer film according to claim 1 , wherein the polyolefin composition the ethylene derived units content in component A) ranges from about 2.6 wt % to about 5.2 wt % claim 1 , based upon the total weight of the propylene ethylene copolymer.4. The multilayer ...

POLYPROPYLENE BASED COMPOSITION WITH IMPROVED PAINTABILITY

The present invention relates to a polypropylene based composition comprising:(A) from 40.0 to 85.0 wt % of a heterophasic propylene copolymer having a content of xylene cold soluble (XCS) fraction in the range of 15 wt % to 35 wt %, based on the total weight of the heterophasic propylene copolymer;(B) from 5.0 to 15.0 wt % of a terpolymer of propylene with ethylene and 1-butene comonomer units having a melting temperature Tm as measured in differential scanning calorimetry (DSC) of less than 140° C.; (C) from 5.0 to 25.0 wt % of an ethylene copolymer with alpha-olefin comonomer units having from 4 to 12 carbon atoms with a density of from 850 kg/mto 900 kg/m; and(D) from 5.0 to 25.0 wt % of an inorganic filler, wherein the amounts of components (A), (B), (C), and (D) are all based on the total weight amount of the polypropylene based composition, said polypropylene based composition having a melt flow rate (MFR2) as measured at 230° C. and 2.16 kg load in accordance with ISO 1133 in the range of 2.0 g/10 min to 20 g/10 min, an article comprising said polypropylene based composition and the use of said terpolymer (B) for reducing the paint adhesion failure of an article comprising said polypropylene based composition. 1. A polypropylene based composition comprising:(A) from 40.0 to 85.0 wt % of a heterophasic propylene copolymer having a content of xylene cold soluble (XCS) fraction in the range of 15 wt % to 35 wt %, based on the total weight of the heterophasic propylene copolymer;(B) from 5.0 to 15.0 wt % of a terpolymer of propylene with ethylene and 1-butene comonomer units having a melting temperature Tm as measured in differential scanning calorimetry (DSC) of less than 140° C.;{'sup': 3', '3, '(C) from 5.0 to 25.0 wt % of an ethylene copolymer with alpha-olefin comonomer units having from 4 to 12 carbon atoms with a density of from 850 kg/mto 900 kg/m; and'}(D) from 5.0 to 25.0 wt % of an inorganic filler,wherein the amounts of components (A), (B), (C), and ...

POLYETHYLENE COMPOSITION HAVING HIGH SWELL RATIO

The present disclosure relates to a polyethylene composition with improved swell ratio and mechanical properties, particularly suited for preparing blow-moulded articles, said composition having the following features: 2. The polyethylene composition of claim 1 , comprising one or more ethylene copolymers.3. The polyethylene composition of claim 2 , containing 1% by weight or less of comonomer.4. The polyethylene composition of claim 3 , wherein the comonomer or comonomers present in the ethylene copolymers are selected from olefins having formula CH═CHR wherein R is an alkyl radical claim 3 , linear or branched claim 3 , having from 1 to 10 carbon atoms.5. The polyethylene composition of claim 1 , obtainable by using a Ziegler-Natta polymerization catalyst.6. The polyethylene composition of claim 1 , having at least one of the following additional features:a Mw equal to or greater than 250000 g/mol;a Long Chain Branching index equal to or greater than 0.70;a MIP of 0.05-0.5 g/10 min.; anda MIF of 1-15 g/10 min.7. The polyethylene composition of claim 1 , comprising:{'sup': '3', 'A) 40-60% by weight of an ethylene homopolymer or copolymer with density equal to or greater than 0.960 g/cmand melt flow index MIE at 190° C. with a load of 2.16 kg, according to ISO 1133, of 2-30 g/10 min.; and'}B) 40-60% by weight of an ethylene copolymer having a MIE value lower than the MIE value of A).8. A manufactured article comprising the polyethylene composition of .9. The manufactured article of claim 8 , comprising a blow-molded article.10. A process for preparing the polyethylene composition of claim 1 , wherein all of the polymerization steps are carried out in the presence of a Ziegler-Natta polymerization catalyst supported on MgCl. This application is a Continuation Application of co-pending U.S. patent application Ser. No. 14/437,456, filed Apr. 21, 2015, which is the U.S. National Phase of PCT International Application PCT/EP2013/071998, filed Oct. 22, 2013, claiming ...

Polyethylene composition having high mechanical properties and processability

A polyethylene composition having the following features: 1) density from about 0.945 to about 0.951 g/cm 3 , determined according to ISO 1183 at 23° C.; 2) ratio MIF/MIP from about 25 to about 43; 3) MIF from about 3.5 to less than about 8.5 g/10 min.; 4) HMWcopo index from about 1 to about 40; and 5) long-chain branching index, LCBI, equal to or greater than about 0.83. The polyethylene composition can be used to produce pipes.

Polyolefin Blends Comprising Single-Site Catalyst Produced Syndiotactic Polypropylene and Polyethylene, Process and Articles Made From These Blends

The invention relates to blends of at least one single-site catalyst polyethylene and at least one single-site catalyst syndiotactic polypropylene with a specific syndiotactic polypropylene content φin weight percent relative to the total weight of both the polyethylene and the syndiotactic polypropylene contained in the blend corresponding to: 115.-. (canceled)17. The blend according to claim 16 , wherein a is:at most 1.30, and/orat least 0.50.18. The blend according to claim 16 , wherein the content of syndiotactic polypropylene is at most 55 wt % claim 16 , relative to the total weight of both the polyethylene and the syndiotactic polypropylene contained in the blend.19. The blend according to claim 16 , wherein the content of the syndiotactic polypropylene is at least 25 wt % claim 16 , relative to the total weight of both polyethylene and syndiotactic polypropylene contained in the blend.20. The blend according to claim 16 , wherein both the polyethylene and the syndiotactic polypropylene have a molecular weight distribution Mw/Mn of at most 5 and/or of at least 2.1.21. The blend according to claim 16 , wherein the polyethylene has a MI2 of at least 1.5 g/10 min as measured according to ISO 1133 at 190° C. under a load of 2.16 kg.22. The blend according to claim 16 , wherein at least one single-site catalyst catalyzed polyethylene is a metallocene polyethylene and/or at least one single-site catalyst catalyzed syndiotactic polypropylene is a metallocene syndiotactic polypropylene.23. The blend according to claim 16 , wherein the blend further comprises from 0.1 wt % to 50 wt % of a filler claim 16 , and the filler comprises one or more reinforcement material selected from glass fibers and carbon nanotubes.24. The blend according to claim 16 , wherein the syndiotactic polypropylene and the polyethylene are in co-continuous phases.26. The blend according to characterized in that the at least one single-site catalyst catalyzed syndiotactic polypropylene in the ...

HETEROPHASIC POLYPROPYLENE WITH IMPROVED IMPACT STRENGTH/STIFFNESS BALANCE, IMPROVED POWDER FLOWABILITY, REDUCED EMISSIONS AND LOW SHRINKAGE

Heterophasic polypropylene composition with improved impact strength/stiffness balance and with high flowability, reduced emissions and low shrinkage, and its use. 2. A heterophasic polypropylene composition according to claim 1 , wherein the ratio of MFR/MFRis ≦0.5.3. A heterophasic polypropylene composition according to claim 1 , having a crystalline polypropylene content with a melting point (T) from DSC analysis according ISO 11357 in the range of 160 to 170° C. and optionally a crystalline polyethylene content with a melting point from DSC analysis according ISO 11357 in the range of 105 to 130° C.4. A heterophasic polypropylene composition according to claim 1 , comprising either a flexural modulus determined according to ISO 178 (FM) on an injection moulded specimen of 80×10×4 mmin the range of 500 to 1100 MPa or a tensile modulus (TM) measured at 23° C. according to ISO 527-1 (cross head speed 1 mm/min) in the range of 500 to 1100 MPa and furthermore by a Charpy notched impact strength (NIS) determined according to ISO 179 1eA at 23° C. on an injection moulded specimen of 80×10×4 mmof at least 10.0 kJ/m.5. A heterophasic polypropylene composition according to claim 1 , having a total comonomer content defined as the sum of contents of ethylene and α-olefins with 4-10 carbon atoms in the range of 6.0 to 26.0 wt %.6. A heterophasic polypropylene composition according to claim 1 , comprising at least two glass transition points (T) as determined by dynamic-mechanical thermal analysis according ISO 6721-7 claim 1 , with one T(T(1)) associated to the crystalline isotactic propylene homopolymer matrix being in the range of −4 to 4° C. and another T(T(2)) associated to the predominantly amorphous propylene copolymer being in the range of −60 to −35° C.7. A heterophasic polypropylene composition according to claim 1 , comprising a Charpy notched impact strength determined according to ISO 179 1 eA at −20° C. on an injection moulded specimen of 80×10×4 mmin the range ...

Process for the preparation of a composition comprising heterophasic propylene co-polymer and talc

The invention relates to a Process for the preparation of a composition comprising a heterophasic propylene copolymer and talc, wherein the heterophasic propylene copolymer consists of (a) a propylene-based matrix, wherein the propylene-based matrix consists of a propylene homopolymer and/or a propylene-α-olefin copolymer consisting of at least 70% by mass of propylene and up to 30% by mass of α-olefin, based on the total mass of the propylene-based matrix, wherein the propylene-based matrix is present in an amount of 60 to 95 wt % based on the total heterophasic propylene copolymer and (b) a dispersed ethylene-α-olefin copolymer, wherein the dispersed ethylene-α-olefin copolymer is present in an amount of 40 to 5 wt % based on the total heterophasic propylene copolymer and wherein the sum of the total amount of propylene-based matrix and total amount of the dispersed ethylene-α-olefin copolymer in the heterophasic propylene copolymer is 100 wt %, wherein the composition has a desired melt flow index in the range of 1 to 200 dg/min as measured according to ISO1133 (2.16 kg/230° C.), wherein at least part of the talc is surface-modified and wherein the amount of talc in the composition is from about 0.5 to at most 5 wt % based on the heterophasic propylene copolymer, comprising the step of (a) melt-mixing the heterophasic propylene copolymer with the talc and a peroxide, wherein the amount of peroxide is chosen such that a composition comprising a heterophasic propylene copolymer and talc having the desired melt flow index is obtained.

SOFT AND TRANSPARENT PROPYLENE COMPOLYMERS

The present invention is directed to a polypropylene composition (C) comprising a heterophasic propylene copolymer (RAHECO) and a plastomer (PL) as well as a process for the preparation of said polypropylene composition and a film obtained from said polypropylene composition (C). 2. The polypropylene composition (C) according to claim 1 , wherein the polypropylene composition (C) has at least two glass transition temperatures Tg(1) and Tg(2) claim 1 , the first glass transition temperature Tg(1) relates to the matrix (M) while the second glass transition temperature Tg(2) relates to the dispersed elastomeric propylene copolymer (E) claim 1 , wherein further the second glass transition temperature fulfils the inequation (II) claim 1 ,{'br': None, 'i': Tg', 'C', 'XCS, '(2)>9.0−2.0×()\u2003\u2003(II)'}whereinTg(2) is the second glass transition temperature of the polypropylene composition (C) and C(XCS) is the comonomer content [in mol-%] of the xylene cold soluble fraction (XCS) of the polypropylene composition (C).3. The polypropylene composition (C) according to claim 1 , having at least two glass transition temperatures Tg(1)′ and Tg(2)′ claim 1 , wherein the second glass transition temperature fulfils the inequation (I) claim 1 ,{'br': None, 'i': Tg', 'C', 'XCS, '(2)′>10.0−1.8×()′\u2003\u2003(I)'}whereinTg(2)′ is the second glass transition temperature of the polypropylene composition (C) and C(XCS)′ is the propylene content [in mol-%] of the xylene cold soluble fraction (XCS) of the polypropylene composition (C).4. The polypropylene composition (C) according to claim 1 , wherein the melt flow rate MFR(230° C./2.16 kg) measured according to ISO 1133 of the polypropylene composition (C) is in the range of 1.0 to 30 g/10 min.5. The polypropylene composition (C) according to claim 1 , wherein the polypropylene composition (C) has at least one of:i) a xylene soluble content (XCS) in the range of 10.0 to 45.0 wt.-%, orii) a propylene content in the range of 65.0 to 96. ...

POLYETHYLENE COMPOSITION

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same. 1. A bimodal linear medium density polyethylene composition comprising a lower molecular weight (LMW) polyethylene component and a higher molecular weight (HMW) polyethylene component , wherein each of the LMW and HMW polyethylene components comprises ethylene-derived monomeric units and (C-C)alpha-olefin-derived comonomeric units; and wherein the bimodal linear medium density polyethylene composition is characterized by each of limitations (a) to (d): (a) a resolved bimodality showing in a chromatogram of gel permeation chromatography (GPC) of the bimodal linear medium density polyethylene composition , wherein the chromatogram shows a peak representing the HMW polyethylene component , a peak representing the LMW polyethylene component , and a resolved bimodal molecular weight distribution characterized by a local minimum in a range of Log(molecular weight) (“Log(MW)”) 1.5 to 5.0 between the peak representing the HMW polyethylene component and the peak representing the LMW polyethylene component , measured according to Bimodality Test Method; (b) a molecular mass dispersity (M/M) , D , from 5 to 30.1 , measured according to Gel Permeation Chromatography (GPC) Test Method; (c) no measurable amount of long chain branching per 1 ,000 carbon atoms (“LCB Index”) , measured according to LCB Test Method; and (d) a density from 0.930 to 0.950 gram per cubic centimeter (g/cm) , measured according to ASTM D792-13 Method B.2. The bimodal linear medium density polyethylene composition of described by any one of limitations (i) to (iii): (i) a melt index (190° C. claim 1 , 2.16 kilograms (kg) claim 1 , “MI”) from 0.1 to 5.0 grams per 10 minutes (g/10 min) claim 1 , measured according to Melt Index MITest Method; (ii) a tan delta (tan 6) from 5 to 35 claim 1 , measured at 190° C. and 0.1000 radians per second (rad/s) according to Tan Delta Test ...

POLYETHYLENE COMPOSITION

A bimodal linear polyethylene composition, products made therefrom, methods of making and using same, and articles containing same. 1. A bimodal linear low density polyethylene composition comprising a lower molecular weight (LMW) polyethylene component and a higher molecular weight (HMW) polyethylene component , wherein each of the LMW and HMW polyethylene components comprises ethylene-derived monomeric units and (C-C)alpha-olefin-derived comonomeric units; and wherein the bimodal linear low density polyethylene composition is characterized by each of limitations (a) to (c): (a) a resolved bimodality showing in a chromatogram of gel permeation chromatography (GPC) of the bimodal linear low density polyethylene composition , wherein the chromatogram shows a peak representing the HMW polyethylene component , a peak representing the LMW polyethylene component , and a resolved bimodal molecular weight distribution characterized by a local minimum in a range of Log(molecular weight) (“Log(MW)”) 1.5 to 5.0 between the peak representing the HMW polyethylene component and the peak representing the LMW polyethylene component , measured according to the Bimodality Test Method; (b) a molecular mass dispersity (M/M) , D , from 5 to 30.1 , measured according to the Gel Permeation Chromatography (GPC) Test Method; and (c) no measurable , alternatively no detectable , amount of long chain branching per 1 ,000 carbon atoms (“LCB Index”) , measured according to LCB Test Method.2. The bimodal linear low density polyethylene composition of described by any one of limitations (i) to (vii): (i) a density from 0.9000 to less than (<) 0.930 gram per cubic centimeter (g/cm) claim 1 , measured according to ASTM D792-13 Method B; (ii) a melt index (190° C. claim 1 , 2.16 kilograms (kg) claim 1 , “MI”) from 0.1 to 5.0 grams per 10 minutes (g/10 min.) claim 1 , measured according to the Melt Index MITest Method; (iii) a tan delta (tan δ) from 5 to 35 claim 1 , measured at 190° C. and 0.1000 ...

Propylene composition with improved impact resistance at low temperature

Polypropylene composition comprising comonomer units derived from ethylene in an amount of from 9.0 to 52.0 mol-% and comonomer units derived from a higher a-olefin in an amount of from 0.4 to 3.0 mol-%, wherein said polypropylene composition has an amount of xylene cold solubles of at least 30 wt.-%, wherein further the xylene cold soluble fraction has an ethylene content of from 20.0 to 80.0 mol-% and a higher a-olefin content from 0.1 to 1.5 mol-%.

High-density polyethylene for caps and closures

A high-density polyethylene (HDPE) can be adapted for the manufacture of caps and closures. The caps and closures can be used as screw-on caps for carbonated or still drinks. The high-density polyethylene can have a density of at least 940 kg/m 3 and of at most 970 kg/m 3 , and a high load melt index HLMI of at least 35 dg/min and of at most 180 dg/min. The high-density polyethylene can include a first polyethylene fraction and a second polyethylene fraction. The first polyethylene fraction can have a density of at least 920 kg/m 3 and of at most 945 kg/m 3 , and a melt index HL275 of at least 3 dg/min and of at most 12 dg/min. The second polyethylene fraction can have a density of at least 960 kg/m 3 and of at most 980 kg/m 3 .

Producing propylene impact copolymers and products

A process for producing a propylene impact copolymer (ICOP), the process comprising the steps of feeding propylene and optionally one or more first comonomers into a first reactor; feeding into the first reactor a catalyst mixture; contacting the propylene with the catalyst mixture under first polymerization conditions to form an active propylene-based polymer; transferring at least a portion of the first reactor contents to a second reactor; feeding additional activity limiting agent, additional selectivity control agent and, optionally additional cocatalyst and one or more second comonomers into the second reactor; and maintaining the second reactor at a second reactor temperature in a range that is sufficient to allow copolymerization to form the propylene impact copolymer (ICOP), wherein the second reactor temperature is below 70° C.

POLYMER COMPOSITION AND A PROCESS FOR PRODUCTION OF THE POLYMER COMPOSITION

A polyethylene composition comprising a base resin is disclosed herein. The base resin includes an ethylene homo- or copolymer fraction (A1), and an ethylene homo- or copolymer fraction (A2). Fraction (A1) has a lower weight average molecular weight than fraction (A2). The base resin has a melt flow rate MFRof equal to or less than 8.0 g/10 min and a density of 930 to 950 kg/m3. The polyethylene composition has a melt flow rate MFRof 0.01 to 0.3 g/10 min, a flow rate ratio FRRof equal to or more than 20 and a ratio of the weight average molecular weight and the number average molecular weight (M/M) of equal to or less than 30. Also the polyethylene composition has a tensile modulus of less than 1000 MPa. Also a process for the production of a polyethylene composition comprising polyethylene base resin is disclosed herein. 1. A polyethylene composition comprising a base resin which comprises(a) an ethylene homo- or copolymer fraction (A1); and(b) an ethylene homo- or copolymer fraction (A2),wherein(I) fraction (A1) has a lower weight average molecular weight than fraction (A2);{'sup': '3', '(II) the base resin has a density of 930 to 950 kg/m;'}{'sub': '21', '(III) the base resin has a melt flow rate MFRof equal to or less than 8.0 g/10 min;'}{'sub': '5', '(IV) the polyethylene composition has a melt flow rate MFRof 0.01 to 0.3 g/10 min;'}{'sub': '21/5', '(V) the polyethylene composition has a flow rate ratio FRRof equal to or more than 20;'}{'sub': w', 'n, '(VI) the ratio of the weight average molecular weight and the number average molecular weight (M/M) of the polyethylene composition is equal to or less than 30; and'}(VII) the polyethylene composition has a tensile modulus of less than 1000 MPa.2. A polyethylene composition according to claim 1 , wherein the ratio of the weight average molecular weight and the number average molecular weight (M/M) of the polyethylene composition is 5 to 30 claim 1 , preferably 10 to 30 claim 1 , most preferably 15 to 25.3. A ...

Multimodal polypropylene with respect to comonomer content

Multimodal polypropylene with high melt flow comprising two propylene copolymer fractions with different comonomer content.

Formulation Containing a High Density Polyethylene Composition and Microirrigation Drip Tapes Containing the Same

The present disclosure provides formulation. The formulation contains a high density polyethylene composition containing (i) a high molecular weight component including an ethylene/a-olefin copolymer, the high molecular weight component having a density from 0.924 to 0.930 g/cc and a high load melt index (121) from 0.3 to 0.9 g/10 min; and (ii) a low molecular weight component including an ethylene-based polymer selected from the group consisting of an ethylene homopolymer and an ethylene/a-olefin copolymer. The high density polyethylene composition has (a) a density from 0.950 to 0.956 g/cc; (b) a high load melt index (121) from 15 to 28 g/10 min; (c) an 121/12 of at least 85; (d) a notched constant tensile load failure time at 35% yield stress of greater than 90 hours; and (e) an environmental stress crack resistance (ESCR) F0 value, according to ASTM D1693-condition B (100% IGEPAL), of greater than 2,000 hours. 1. A formulation comprising a high density polyethylene composition , wherein the high density polyethylene composition comprises:(i) a high molecular weight component comprising an ethylene/α-olefin copolymer, the high molecular weight component having a density from 0.924 g/cc to 0.930 g/cc and a high load melt index (I21) from 0.3 g/10 min to 0.9 g/10 min, as measured according to ASTM D1238 (190° C., 21.6 kg); and(ii) a low molecular weight component comprising an ethylene-based polymer selected from the group consisting of an ethylene homopolymer and an ethylene/α-olefin copolymer; andthe high density polyethylene composition has:(a) a density from 0.950 g/cc to 0.956 g/cc;(b) a high load melt index (I21) from 15 g/10 min to 28 g/10 min;(c) an I21/I2 of at least 85, wherein I2 is the melt index as measured according to ASTM D1238 (190° C., 2.16 kg);(d) a notched constant tensile load failure time at 35% yield stress, as measured according to ASTM D5397, of greater than 90 hours; and(e) an environmental stress crack resistance (ESCR) F0 value, ...

POLYETHYLENE COMPOSITION FOR HAVING HIGH IMPACT AND STRESS CRACKING RESISTANCE

Polyethylene composition with improved balance of impact resistance at low temperatures and Environmental Stress Cracking Resistance (ESCR), particularly suited for producing protective coatings on metal pipes, said composition having the following features: 1. A polyethylene composition comprising:{'sup': '3', '1) a density from 0.940 to 0.948 g/cmas determined according to ISO 1183 at 23° C.;'}2) a MIF/MIP ratio from 15 to 25, where MIF is the melt flow index at 190° C. with a load of 21.60 kg, and MW is the melt flow index at 190° C. with a load of 5 kg, both determined according to ISO 1133;3) a MIF value from 30 to 45 g/10 min;4) a Mz value equal to or greater than 1000000 g/mol;5) a long-chain branching index, LCBI, equal to or greater than 0.55;{'sub': 'g', 'wherein LCBI is the ratio of the measured mean-square radius of gyration R, measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.'}2. The polyethylene composition of claim 1 , further comprising:6) eta (0.02) from 25,000 to 35,000 Pa·s;wherein eta (0.02) is the complex shear viscosity at an angular frequency of 0.02 rad/s, measured with dynamic oscillatory shear in a plate-plate rotational rheometer at a temperature of 190° C.3. The polyethylene composition of claim 1 , comprising one or more ethylene copolymers.4. The polyethylene composition of claim 3 , comprising a comonomer content of 1.5 to 6% by weight.5. The polyethylene composition of claim 1 , where the composition is obtained by using a Ziegler-Natta polymerization catalyst.6. The polyethylene composition of claim 5 , where the Ziegler-Natta polymerization catalyst comprises the product of reaction of:{'sub': 2', '2, 'a) a solid catalyst component comprising a Ti compound supported on MgCl, the component being obtained by contacting the titanium compound with the MgCl, or a precursor Mg compound, optionally in the presence of an inert medium, for obtaining an intermediate product a′), ...

Polyethylene composition for blow molding having high stress cracking resistance

A polyethylene composition for producing blow-molded hollow articles, having the following features: 1) density from 0.948 to 0.952 g/cm 3 determined according to ISO 1183-1 at 23° C.; 2) ratio MIF/MIP from 12 to 25; 3) MIF from 18 to 40 g/10 min.; 4) Mz equal to or greater than 1,200,000 g/mol; 5) η 0.02 from 35,000 to 55,000 Pa·s; 6) long-chain branching index, LCBI, equal to or greater than 0.55; and 7) ratio (η 0.02 /1000)/LCBI from 55 to 75.

HIGH FLOW TPO COMPOSITIONS WITH EXCELLENT BALANCE IN MECHANICAL PROPERTIES FOR AUTOMOTIVE INTERIOR

The present invention is directed to a heterophasic propylene copolymer (HECO), a polyolefin composition (PO) comprising the heterophasic propylene copolymer (HECO), an automotive article comprising the heterophasic propylene copolymer (HECO) and/or the polyolefin composition (PO) and a process for the preparation of the polyolefin composition (PO) as well as the use of the heterophasic propylene copolymer (HECO) for improving the mechanical properties of a polyolefin composition (PO). 1. A heterophasic propylene copolymer (HECO) comprising:{'sub': '2', 'a) a propylene homopolymer (HPP) having a melt flow rate MFR(230° C.) measured according to ISO 1133 in the range of 100 to 200 g/10 min, and'} [{'sub': '2', '(i) has a melt flow rate MFR(230° C.) measured according to ISO 1133 in the range of 15 to 35 g/10 min,'}, '(ii) comprises a xylene cold soluble (XCS) fraction in an amount from 26 to 36 wt. %, based on the total weight of the heterophasic propylene copolymer (HECO),', 'wherein further the xylene cold soluble (XCS) fraction of the heterophasic propylene copolymer (HECO) has', '(iii) an intrinsic viscosity (IV) measured according to DIN ISO 1628/1 in the range of 2.8 to 3.8 dl/g, and', '(iv) an ethylene content (EC) of 35 to 50 wt. % based on the total weight of the xylene cold soluble (XCS) fraction of the heterophasic propylene copolymer (HECO)., 'b) an elastomeric propylene-ethylene copolymer (E), wherein the heterophasic propylene copolymer (HECO)'}2. The heterophasic propylene copolymer (HECO) according to claim 1 , wherein the propylene homopolymer (HPP) is unimodal with respect to the melt flow rate MFR(230° C.) measured according to ISO 1133 and/or has a xylene cold soluble (XCS) content no higher than 5 wt. %.3. The heterophasic propylene copolymer (HECO) according to claim 1 , wherein the heterophasic propylene copolymer (HECO) has an ethylene content (EC-HECO) of 8 to 18 wt. % claim 1 , based on the total weight of the heterophasic propylene ...

CATIONIC POLYMER WITH AN AT LEAST BIMODAL MOLECULAR WEIGHT DISTRIBUTION

Provided herein is a cationic polymer obtainable by polymerization of at least one cationic monomer, at least one crosslinker and optionally further monomers, such as nonionic monomers, associative monomers, and/or chain transfer agents. The cationic polymer has an at least bimodal molecular weight distribution with at least one first peak (P1) and at least one second peak (P2), wherein the first peak has a rather low average sedimentation coefficient of ≤10 Sved and the second peak has a rather high average sedimentation coefficient of ≥10,000 Sved. The water-soluble polymer components of the cationic polymer are ≥25% by weight related to the total amount of cationic polymer. Further provided herein is a process for obtaining such a cationic polymer as well as to an inverse dispersion, a thickener or a deposition aid, including at least one of such cationic polymers. 3. The cationic polymer according to claim 1 , wherein the monomer component a) contains at least one cationic monomer and at least one nonionic monomer.4. The cationic polymer according to claim 1 , whereini) the first peak (P1) is split into at least two peaks (P1.1, P1.2, . . . P1.X) and the weight average sum of said peaks (P1.1, P1.2, . . . P1.X) has a sedimentation coefficient of ≤6 Sved, and/orii) the first peak (P1) is not split into more than one peak, and the first peak (P1) has an average sedimentation coefficient of ≤5 Sved, and/oriii) the second peak (P2) has an average sedimentation coefficient of ≥14,000 Sved, and/oriv) the cationic polymer has an at least trimodal molecular weight distribution.5. The cationic polymer according to claim 1 , wherein the first peak (P1) is split into at least two peaks (P1.1 claim 1 , P1.2 claim 1 , . . . P.X) claim 1 , whereini) a lower molecular weight peak (P1.1) has a weight average peak maximum of ≤400,000 g/mol, and a higher molecular weight peak (P1.2) has a weight average peak maximum of ≥400,000 g/mol, and/orii) the lower molecular weight peak (P1 ...

POLYETHYLENE COMPOSITION HAVING HIGH STRESS CRACKING RESISTANCE

A polyethylene composition made from or containing a polyethylene, having the following features: 1. A polyethylene composition comprising:A) a polyethylene having the properties of{'sup': '3', '1) density from about 0.930 to about 0.945 g/cm, determined according to ISO 1183 at 23° C.;'}2) a ratio of MIF/MIP from about 10 to less than about 30, where MIF is the melt flow index at 190° C. with a load of 21.60 kg, and MIP is the melt flow index at 190° C. with a load of 5 kg, both determined according to ISO 1133;3) a MIF from about 3 to about 25 g/10 min;4) a Mz equal to or greater than 1,500,000 g/mol, measured by GPC-MALLS (Gel Permeation Chromatography coupled with Multi-angle laser-light scattering); and5) a long-chain branching index, LCBI, equal to or lower than about 0.55 at a molecular weight of 1,000,000 g/mol,{'sub': 'g', 'wherein LCBI is the ratio of the measured mean-square radius of gyration R, measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.'}2. The polyethylene composition of claim 1 , wherein the polyethylene has a Mw equal to or higher than about 300 claim 1 ,000 g/mol.3. The polyethylene composition of claim 1 , wherein the polyethylene comprises an ethylene copolymer.4. The polyethylene composition of claim 1 , wherein the polyethylene is prepared by process using a Ziegler-Natta polymerization catalyst.5. The polyethylene composition of claim 4 , wherein the Ziegler-Natta polymerization catalyst comprises a product of a reaction between:{'sub': 2', '2, 'a) a solid catalyst component comprising a Ti compound supported on MgCl, obtained by contacting the titanium compound with the MgCl, or a precursor Mg compound, optionally in the presence of an inert medium, at a temperature from 130 to 150° C.;'}b) an organo-Al compound; and optionally c) an external electron donor compound.6. The polyethylene composition of claim 1 , wherein the polyethylene has a property selected from the group ...

SOFT COPOLYMERS WITH HIGH IMPACT STRENGTH

The present invention is directed to a new heterophasic propylene copolymer (RAHECO) and an injection molded article comprising the heterophasic propylene copolymer (RAHECO) as well as a thin wall packaging comprising the heterophasic propylene copolymer (RAHECO). The present invention is further directed to the use of the heterophasic propylene copolymer (RAHECO) for improving the toughness of an injection molded article. 120-. (canceled)22. The heterophasic propylene copolymer (RAHECO) according to claim 21 , wherein the heterophasic propylene copolymer (RAHECO) is free of phthalic acid esters as well as their respective decomposition products.23. A heterophasic propylene copolymer (RAHECO) claim 21 , said heterophasic propylene copolymer (RAHECO) comprises a matrix (M) being a random propylene copolymer (R-PP) and an elastomeric propylene copolymer (E) dispersed in said matrix (M) claim 21 , [{'sub': '2', 'a) a melt flow rate MFR(230° C.) measured according to ISO 1133 in the range of 0.3 to 20.0 g/10 min,'}, 'b) a xylene cold soluble content (XCS) determined according ISO 16152 (25° C.) in the range of 16.0 to 50.0 wt.-%,', 'c) a comonomer content in the range of 11.5 to 21.0 mol-%, and, 'wherein the heterophasic propylene copolymer (RAHECO) has'} {'br': None, 'NIS>60−23.0×In(MFR)\u2003\u2003(III)'}, 'wherein further the heterophasic propylene copolymer (RAHECO) has a Charpy notched impact strength as defined by in-equation (III)'}wherein{'sup': '2', '“NIS” is the Charpy notched impact strength according to ISO 179-1eA:2000 at 23° C. [in kJ/m] of the heterophasic propylene copolymer (RAHECO), and'}{'sub': '2', '“MFR” is the MFR(230° C./2.16 kg) [in g/10 min] of the heterophasic propylene copolymer (RAHECO).'}25. A heterophasic propylene copolymer (RAHECO) claim 21 , said heterophasic propylene copolymer (RAHECO) comprises a matrix (M) being a random propylene copolymer (R-PP) and an elastomeric propylene copolymer (E) dispersed in said matrix (M) claim 21 , [{' ...

SOFT AND TRANSPARENT IMPACT COPOLYMERS

The present invention is directed to a new heterophasic propylene copolymer (RAHECO) and an unoriented film comprising the heterophasic propylene copolymer (RAHECO) as well as a container comprising the unoriented film. The present invention is further directed to the use of the heterophasic propylene copolymer (RAHECO) for improving the balance between softness and haze of an unoriented film. 2. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the first glass transition temperature Tg(1) is above the second glass transition temperature Tg(2).3. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein(a) the first glass transition temperature Tg(1) is in the range of −12 to +2° C.;and/or(b) the second glass transition temperature Tg(2) is in the range of above −70 to below −20° C.4. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the xylene cold soluble content (XCS) hasi) a comonomer content in the range of 33.0 to 45.0 mol-%, and/orii) an intrinsic viscosity (IV) determined according to DIN ISO 1628/1, (in Decalin at 135° C.) in the range of 1.0 to 1.8 dl/g.5. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the random propylene copolymer (R-PP) has{'sub': '2', 'i) a melt flow rate MFR(230° C.) measured according to ISO 1133 in the range of 3.0 to 8.0 g/10 min, and/or'}ii) a comonomer content in the range of 4.4 to 7.3 mol-%.7. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the comonomers of the random propylene copolymer (R-PP) and/or the comonomers of the elastomeric propylene copolymer (E) are ethylene and/or Cto Cα-olefin.8. The heterophasic propylene copolymer (RAHECO) according to claim 1 , wherein the heterophasic propylene copolymer (RAHECO) comprises 65.0 to 88.0 wt.-% claim 1 , based on the total weight of the heterophasic propylene copolymer (RAHECO) claim 1 , of the random propylene copolymer (R-PP) and 12.0 to 35.0 wt ...

Ethylene-based polymer compositions with improved processability

The invention provides a composition comprising the following components: A) a first composition, wherein the first composition comprises a first ethylene-based polymer and a second ethylene-based polymer, and wherein the ratio of the “high load melt index (I21) of the first composition” to the “high load melt index (I21) of the first ethylene-based polymer” is greater than, or equal to, 40, and B) one or more azide compounds present in an amount greater than, or equal to, 50 ppm, based on the weight of the first composition.

COMPOSITIONS WITH MULTIMODAL ETHYLENE-BASED POLYMERS HAVING IMPROVED TOUGHNESS AT LOW TEMPERATURES

Embodiments of a polymer compositions and articles comprising such compositions contain at least one multimodal ethylene-based polymer, wherein the multimodal ethylene-based polymer exhibits superior low temperature performance. 1. A polymer composition comprising:{'sub': 2', '3', '12, 'claim-text': [{'sub': 'w(GPC)', 'the first ethylene-based component has a density of 0.855 to 0.900 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 0.930 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 0.930 g/cc when 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., 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 multimodal ethylene-based polymer comprises from 20 to 50% by weight of the first ethylene-based component claim 1 , from 10 to 40% by weight of the second ethylene-based component claim 1 , and 25 to 60% by weight of the third ethylene-based component.3. The polymer composition of claim 1 , wherein the melt index (I) of the multimodal ethylene-based polymer ...

Polyolefins having improved dimensional stability in three-dimensional printing, articles formed therefrom, and methods thereof

A polymer composition suitable for manufacturing of isotropic three-dimensional printed articles, the composition including: a matrix phase including a propylene-based polymer or copolymer; and a dispersed phase in the matrix phase, the dispersed phase including an ethylene-based copolymer having a C3-C12 comonomer, wherein the dispersed phase has a different composition than the matrix phase, wherein the matrix phase has a crystallization half-time of less than 60 minutes.

POLYESTER ELASTOMER

A polyester elastomer is provided, which includes a product of reacting (a) amide oligomer, (b) polyalkylene glycol, and (c) poly(alkylene arylate). (a) Amide oligomer has a chemical structure of 2. The polyester elastomer as claimed in claim 1 , wherein (b) polyalkylene glycol and (c) poly(alkylene arylate) have a weight ratio of 20:80 to 80:20.3. The polyester elastomer as claimed in claim 1 , wherein a total weight of (b) polyalkylene glycol and (c) poly(alkylene arylate) and a weight of (a) amide oligomer have a weight ratio of 99.99:0.01 to 50:50.4. The polyester elastomer as claimed in claim 1 , having an inherent viscosity of 1.0 dL/g to 1.5 dL/g at 30° C.5. The polyester elastomer as claimed in claim 1 , having an elastic recoverability of 90% to 100%.7. The polyester elastomer as claimed in claim 1 , serving as fiber claim 1 , plate claim 1 , or wire. This application claims the benefit of U.S. Provisional Application No. 62/345,271 filed on Jun. 3, 2016, and Taiwan application No. 105140064 filed on Dec. 5, 2016, the entirety of which is incorporated by reference herein.The technical field relates to polyester elastomer, and in particular it relates to reactants thereof.Thermoplastic polyester elastomers (TPEE) are important polymer engineering materials due to their advantages such as high thermal resistance, excellent repeated fatigue properties, high toughness, and high flexibility at low temperatures. In addition, the TPEE have heavy weight-loading abilities, a high elastic recoverability, and excellent oil/chemical/solvent resistance. The TPEE can be processed to mold using standard thermoplastic processing equipment and skills, such as extrusion, injection, blowing, and the like. The TPEE free of sulfurization can be directly used to produce rubber products, thereby increasing the production efficiency. The scrap of the TPEE can be recycled to conserve resources, which is beneficial to environment protection. In general, it is not easy to prepare a ...

POLETHYLENE COMPOSITION HAVING HIGH SWELL RATIO

A polyethylene composition for producing blow-molded hollow articles, having the following features: 1. A polyethylene composition having the following features:{'sup': '3', '1) density from 0.940 to 0.955 g/cmdetermined according to ISO 1183 at 23° C.;'}2) ratio MIF/MIP from 12 to 30, where MIF is the melt flow index at 190° C. with a load of 21.60 kg and MIP is the melt flow index at 190° C. with a load of 5 kg, both determined according to ISO 1133;3) Mz from 2,000,000 to 4,500,000 g/mol, where Mz is the z-average molecular weight measured by GPC;{'sub': 0.02', '0.02, '4) ηfrom 160,000 to 300,000 Pa·s wherein ηis the complex shear viscosity at an angular frequency of 0.02 rad/s, measured with dynamic oscillatory shear in a plate-plate rotational rheometer at a temperature of 190° C.; and'}{'sub': 'g', '5) long-chain branching index, LCBI, equal to or greater than 0.75, wherein LCBI is the ratio of the measured mean-square radius of gyration R, measured by GPC-MALLS, to the mean-square radius of gyration for a linear PE having the same molecular weight.'}2. The polyethylene composition of comprising:one or more ethylene copolymers.3. The polyethylene composition of prepared with a Ziegler-Natta polymerization catalyst.4. The polyethylene composition of claim 3 , wherein the Ziegler-Natta polymerization catalyst comprises:the product of reaction of:{'sub': 2', '2, 'a) a solid catalyst component comprising a Ti compound supported on MgCl, the component being obtained by contacting the titanium compound with the MgCl, or a precursor Mg compound, optionally in the presence of an inert medium, thereby obtaining an intermediate product a′), then subjecting a′) to pre-polymerization and contact with an electron donor compound;'}b) an organo-Al compound; and optionallyc) an external electron donor compound.6. The polyethylene composition of claim 1 , comprising:{'sup': '3', 'A) 30-70% by weight of an ethylene homopolymer or copolymer with density equal to or greater than ...

Extruded articles with improved optical properties

Extruded articles based on a nucleated polypropylene homopolymer showing improved optical properties such as haze or relative haze and a good balance between optical and thermomechanical properties.

POLYETHYLENE COMPOSITION HAVING ENVIRONMENTAL STRESS CRACKING RESISTANCE

A polyethylene composition for producing blow-molded hollow articles, having the following features: 2. The polyethylene composition of claim 1 , comprising:one or more ethylene copolymers.3. The polyethylene composition of claim 1 , obtained by using a Ziegler-Natta polymerization catalyst.4. The polyethylene composition of claim 3 , wherein the Ziegler-Natta polymerization catalyst comprises:the product of a reaction of:{'sup': 'I', 'A) a solid catalyst component comprising Ti, Mg, chlorine and one internal electron donor ED selected from esters of aliphatic monocarboxylic acids (EAA) and another internal donor EDselected from cyclic ethers (CE) in an amount such that the EAA/CE molar ratio ranges from 0.02 to less than 20;'}B) an organo-Al compound; and optionallyC) an external electron donor compound.5. The polyethylene composition of claim 1 , having at least one of the following additional features:a MIF from 4 to 15 g/10 min.;{'sub': 0.02', '0.02, 'a ratio (η/1000)/LCBI, which is between ηdivided by 1000 and LCBI, equal to or greater than 150;'}a comonomer content equal to or less than 2% by weight, with respect to the total weight of the composition; anda LCBI equal to or greater than 0.65.6. The polyethylene composition of claim 1 , comprising:{'sup': '3', 'A) 30-70% by weight of an ethylene homopolymer or copolymer with density equal to or greater than 0.960 g/cmand melt flow index MIE at 190° C. with a load of 2.16 kg, according to ISO 1133, of 2 g/10 min. or higher; and'}B) 30-70% by weight of an ethylene copolymer having a MIE value lower than the MIE value of A).7. An article of manufacture comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the polyethylene composition of .'}8. The article of manufacture according to claim 7 , wherein the article is a blow-molded hollow article.9. A process for preparing the polyethylene composition of claim 1 , wherein the polymerization steps are carried out in the presence of a Ziegler-Natta ...

Method for the preparation of a heterophasic copolymer and uses thereof

Methods for preparing an impact copolymer by selecting a continuous phase polymer having a first melt flow rate and selecting a rubber phase polymeric material such that the final melt flow rate of the impact copolymer is within 2 g/10 min of the first melt flow rate. Impact copolymers made from such methods and films and molded articles produced from such impact copolymers are also included.

Process for polymerizing one or more olefins

Polymerization processes. In some embodiments, the polymerization process can include introducing a carrier fluid, an olefin, and a catalyst feed into a polymerization reactor, wherein the catalyst feed comprises one or more catalysts, a carrier liquid and optionally an induced condensing agent. In some embodiments, a combined amount of the carrier liquid and any induced condensing agent in the catalyst feed is ≥ 350 kg per mole of the one or more catalysts introduced into the polymerization reactor. The process can also include polymerizing the olefin in the presence of the catalyst within the polymerization reactor to produce a polymer product.

Ethylene/α-olefin polymer blends comprising components with differing ethylene contents

An ethylene/α-olefin polymer blend is described comprising first and second ethylene/α-olefin polymer components in which the ethylene content of the first component is at least 10 weight percent different than the ethylene content of the second component. These blends exhibit an improved combination of low temperature, pellet flow, compression set, melt strength and/or shape retention properties as compared to either component, or an ethylene/α-olefin polymer blend of similar composition but in which the ethylene content of each component is substantially the same.

Polymerisation of ethylene

A process for producing polyethylene in a two step polymerisation process that comprises the steps of: (a) homopolymerising ethylene in the presence of a first catalyst comprising an activated chromium catalyst in a first reactor to produce a first polyethylene fraction; (b) transferring the first polyethylene fraction produced in the first reactor and at least a portion of the first catalyst to a second reactor; (c) in the second reactor homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer having from 3 to 10 carbon atoms in the presence of a second catalyst under conditions which suppress residual activity in the first catalyst to produce a second polyethylene fraction; and (d) retrieving from the second reactor polyethylene comprising a blend of the first and second polyethylene fractions.

Polymerisation of ethylene

A process for producing polyethylene in a two step polymerisation process that comprises the steps of: (a) homopolymerising ethylene in the presence of a first catalyst comprising an activated chromium catalyst in a first reactor to produce a first polyethylene fraction; (b) transferring the first polyethylene fraction produced in the first reactor and at least a portion of the first catalyst to a second reactor; (c) in the second reactor homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer having from 3 to 10 carbon atoms in the presence of a second catalyst under conditions which suppress residual activity in the first catalyst to produce a second polyethylene fraction; and (d) retrieving from the second reactor polyethylene comprising a blend of the first and second polyethylene fractions.

Polymerization of polyethylene

A process for producing polyethylene in a two step polymerisation process that comprises the steps of: (a) homopolymerising ethylene in the presence of a first catalyst comprising an activated chromium catalyst in a first reactor to produce a first polyethylene fraction; (b) transferring the first polyethylene fraction produced in the first reactor and at least a portion of the first catalyst to a second reactor; (c) in the second reactor homopolymerising ethylene or copolymerising ethylene and an alpha-olefinic comonomer having from 3 to 10 carbon atoms in the presence of a second catalyst under conditions which suppress residual activity in the first catalyst to produce a second polyethylene fraction; and (d) retrieving from the second reactor polyethylene comprising a blend of the first and second polyethylene fractions.

Process for removal of intermediate hydrogen from cascaded polyolefin slurry reactors

Multimodal polyolefin polymers may be prepared in series-connected polymerization reactors where a prior reactor is a slurry reactor employing light solvent as the slurry medium and hydrogen to limit polymer molecular weight, the polymer product from the prior reactor being substantially freed of hydrogen prior to entry into a subsequent polymerization reactor operating at low hydrogen pressure to produce a high molecular weight olefin. The economics and operating performance of such a series slurry reactor polyethylene process can be significantly improved through the use of an intermediate slurry transfer system and hydrogen removal apparatus that employs flash drums in series in conjunction with a warm recycle solvent slurry diluent.

Process for manufacturing single-site polyolefins

A dual olefin polymerization process is disclosed. The process uses a bridged indenoindolyl ligand-containing Group 4 transition metal complex and an activator. It is carried out in multiple stages or in multiple reactors. The same complex and the same activator are used in all stages or reactors. Different polyolefins are made in different stages or reactors by varying the monomer compositions, hydrogen concentrations, or both. The process of the invention produces polyolefins which have broad molecular weight distributions, composition distributions, or both.

Method of producing multimodal polyolefin polymer with improved hydrogen removal

FIELD: chemistry. SUBSTANCE: invention relates to a method of producing a multimodal polyolefin polymer and an apparatus for production thereof. A method of production at temperature of 40-150°C and pressure of 0.1-20 MPa in the presence of a polymerisation catalyst in a first and a second polymerisation reactor connected in series, where in the first reactor a first polyolefin polymer is obtained in suspension in the presence of hydrogen and in the second reactor a second polyolefin polymer is obtained in the presence of a lower hydrogen concentration than in the first reactor, the method comprising: a) withdrawing from the first reactor a suspension of solid polyolefin particles in a suspension medium containing hydrogen; b) feeding the suspension into a flash drum at a lower pressure than that of the first reactor; c) vaporising part of the suspension medium; d) withdrawing a hydrogen-depleted suspension from the flash drum and feeding it into the second reactor; e) separating gas from the gas-phase of the flash drum and feeding it into a heat exchanger; f) condensing part of the gas separated from the flash drum; and g) returning the liquid obtained in the heat exchanger to the polymerisation process at a point where suspension is present. EFFECT: apparatus for producing a multimodal polyolefin polymer is described. 14 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 553 292 C2 (51) МПК C08F 2/18 (2006.01) C08F 10/00 (2006.01) C08L 23/00 (2006.01) B01J 8/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012131358/05, 20.12.2010 (24) Дата начала отсчета срока действия патента: 20.12.2010 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): МАЙЕР Герхардус (DE), АУЛЬБАХ Михаэль (DE), ПРАНГ Харальд (DE) 22.12.2009 EP 09015836.1; 22.02.2010 US 61/338,664 R U (73) Патентообладатель(и): БАЗЕЛЛЬ ПОЛИОЛЕФИНЕ ГМБХ (DE) (43) Дата публикации заявки: 27.01.2014 Бюл. № 3 (56) Список документов, ...

Homogeneous polymer blend and process of making the same

A homogeneous polymer blend comprises a thermoplastic first polymer having a crystallinity of at least 30%; and a second polymer having a crystallinity of more than 5% and being at least partially cross-linked.

Thermoplastic Olefin Compositions

An in-or polymer blend including (a) a propylene-containing first polymer; and (b) propylene-containing second polymer having a different crystallinity from the first polymer. The polymer blend has a melting temperature, Tm, of at least 135° C., a melt flow rate of at least 70 dg/min, a tensile strength of at least 8 MPa, an elongation at break of at least 300%.

Heterogeneous in-situ polymer blend

A heterogeneous in-situ polymer blend comprising a continuous phase comprising a polypropylene having a crystallinity of at least 30% and a melting point temperature T m greater than 130° C., and a heat of fusion ΔH f greater than 65 J/g; and a dispersed phase comprising particles of an elastomeric copolymer dispersed in the continuous phase and having an average particle size of less than 5 micron, the elastomeric copolymer comprising ethylene units and 0.001 to 5 wt % diene by weight of the copolymer, and having a crystallinity of less than 20% and being at least partially cross-linked such that the degree of cross-link is at least 20%.

Homogeneous polymer blend and process of making the same

A homogeneous polymer blend comprises a thermoplastic first polymer having a crystallinity of at least 30%; and a second polymer having a crystallinity of more than 5% and being at least partially cross-linked.

Homogeneous polymer blend and process of making the same

A homogeneous polymer blend comprises a thermoplastic first polymer having a crystallinity of at least 30%; and a second polymer having a crystallinity of more than 5% and being at least partially cross-linked.

Thermoplastic olefin compositions

An in-reactor polymer blend including (a) a propylene-containing first polymer; and (b) propylene-containing second polymer having a different crystallinity from the first polymer. The polymer blend has a melting temperature, Tm, of at least 135° C., a melt flow rate of at least 70 dg/min, a tensile strength of at least 8 MPa, an elongation at break of at least 300%.

Polyolefin compositions having high tenacity

Multimodal polyolefin pipe

The present invention relates to a polyethylene resin having a multimodal molecular weight distribution, said resin being further characterized in that it has a density in the range of from about 0.925 g/ccm to about 0.950 g/ccm, a melt index (I 2 ) in the range of from about 0.05 g/10 min to about 5 g/10 min, and in that it comprises at least one high molecular weight (HMW) ethylene interpolymer and at least a low molecular weight (LMW) ethylene polymer, and a composition comprising such resin. Also provided is a shaped article comprising said resin or composition, in particular a pipe.

Bimodal polyethylene composition and articles made therefrom

The invention relates to a polyethylene composition with a bimodal molecular weight distribution, methods for making the same, and articles made therefrom, such as high topload blow moldings and transmission and distribution pipes. The composition comprises a low-molecular-weight (LMW) ethylene homopolymer component and a homogeneous, high-molecular-weight (HMW) ethylene interpolymer component, wherein the LMW component is characterized as having a molecular weight distribution, MWD L , of less than about 8. In some embodiments, the HMW component is characterized by a reverse comonomer distribution.

Process for producing bimodal ethylene polymers in tandem reactors

A process is provided for producing a bimodal ethylene polymer blend comprising contacting in a first gas phase, fluidized bed reaction zone under polymerization conditions, a gaseous monomeric composition comprising a major proportion of ethylene and, optionally, hydrogen, with a Ziegler-Natta catalyst, the hydrogen/ethylene molar ratio (H₂/C₂ ratio) being no higher than about 0.3 and the ethylene partial pressure being no higher than about 100 psia, to produce a relatively high molecular weight (HMW) polymer associated with catalyst particles, transferring the HMW polymer associated with catalyst particles to a second gas phase, fluidized bed reaction zone into which is also fed hydrogen and a gaseous monomeric composition comprising a major proportion of ethylene, under polymerization conditions including an H₂/C₂ ratio of at least about 0.9 and at least about 8.0 times that in the first reaction zone, and an ethylene partial pressure of at least 1.7 times that in said first reaction zone, to produce a low molecular weight (LMW) polymer deposited on and within the voids of the HMW polymer/catalyst particles, the resulting bimodal polymer blend obtained from the second reaction zone having a fraction of HMW polymer of at least about 0.35.

Multi-stage process for the polymerization of olefins

A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and (C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B). Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl/g, Mw/Mn > 8 and cold xylene solubility < 1.2 %wt.

Multi-stage process for the polymerization of olefins

A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and (C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B). Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl/g, Mw/Mn>8 and cold xylene solubility<1.2% wt.

Process for manufacturing single-site polyolefins

A dual olefin polymerization process is disclosed. The process uses a bridged indenoindolyl ligand-containing Group 4 transition metal complex and an activator. It is carried out in multiple stages or in multiple reactors. The same complex and the same activator are used in all stages or reactors. Different polyolefins are made in different stages or reactors by varying the monomer compositions, hydrogen concentrations, or both. The process of the invention produces polyolefins which have broad molecular weight distributions, composition distributions, or both.

Multistep process for the (co)polymerization of olefins

A multistep process for the polymerization of one or more olefins comprising a first step of polymerizing one or more of said olefins in the presence of a catalyst of the Ziegler-Natta type, a step wherein the polymer obtained in the first step is contacted with a catalyst system comprising an half-sandwich metallocene compound, followed by a second polymerization step. The amount of homo- or copolymer of olefins produced in the first polymerization step is between 10% to 90% by weight of the total amount of polymer produced.

Multi-stage process for the polymerization of olefins

A multi-stage process for preparing ethylene (co)polymers having broad molecular weight distributions is disclosed, said process comprising: (A) a first polymerization stage in which, in the presence of a Ti or V catalyst, a first ethylene polymer is prepared; (B) a treatment stage in which the catalyst used in the first stage is deactivated and in which a bridged bis-2-indenyl zirconocene is supported on the ethylene polymer produced in stage (A), optionally in the presence of a suitable cocatalyst; and (C) a second polymerization stage in which ethylene is polymerized in the presence of the product obtained from stage (B). Furthermore, polyethylene obtainable by the above process is disclosed, having intrinsic viscosity ranging from 0.5 to 6 dl/g, Mw/Mn>8 and cold xylene solubility<1.2 % wt.

Process for manufacturing single-site polyolefins

A dual olefin polymerization process is disclosed. The process uses a bridged indenoindolyl ligand-containing Group 4 transition metal complex and an activator. It is carried out in multiple stages or in multiple reactors. The same complex and the same activator are used in all stages or reactors. Different polyolefins are made in different stages or reactors by varying the monomer compositions, hydrogen concentrations, or both. The process of the invention produces polyolefins which have broad molecular weight distributions, composition distributions, or both.