VERFAHREN ZUR STRAHLENBEHANDLUNG VON ETHYLENPOLYMEREN

Kabel mit reduziertem Anteil an flüchtigen Verbindungen

Multimodale Polyethylenzusammensetzung für durch Spritzgussverfahren hergestellte Kappen und Verschlussvorrichtungen

Multimodale Polyethylenzusammensetzung für Rohre

Herstellung einer Olefinpolymerisationskatalysatorkomponente

ENTGASUNGSVORRICHTUNG

ELEKTRISCHES KABEL

Polyethylenfilm mit verbesserter Verarbeitbarkeit und verbesserten mechanischen Eigenschaften

Migrationsarme Polyolefinzusammensetzung

Rohr mit gegen extrem langsames Risswachstum beständigem Polyethylen

Verfahren zur Polymerisation von Olefinen in Gegenwart eines Olefin Polymerisationskatalysators

Propylenpolymerzusammensetzungen

Polymerschicht für Kabel mit verbesserter Weissbruchneigungsbeständigkeit

Vernetzbares Gemisch zur Herstellung eines geschichteten Artikels

MULTIMODAL POLYETHYLENE PIPE FOR HOT FLUIDS

A polymer pipe for hot fluids, usually hot water is described. The pipe is characterised in that it comprises a multimodal polyethylene with a high molecular weight (HMW) fraction and a low molecular weight (LMW) fraction where said HMW fraction has a density of at least 0.920 g/cm3, and that the multimodal polyethylene has a density of 0.921-0.950 g/cm3 and has a time to failure at 95~C and 3.6 MPa of at least 165 h determined according to DIN 16 833 and a modulus of elasticity of at most 900 MPa determined according to ISO 527-2/1B. Preferably, the multimodal polyethylene is a bimodal polyethylene, the LMW fraction having a density of 0.955-0.975 g/cm3, the HMW fraction having a density of 0.920-0.940 g/cm3, and the weight ratio of the LMW fraction to the HMW fraction being from 30:70 to 55:45.

A LAYER FOR CABLES HAVING IMPROVED STRESS WHITENING RESISTANCE

The present invention relates to a Insulation layer for cables, a composition and a process thereof, showing improved stress whitening resistance by maintaining good mechanical and electrical properties and being environmental friendly.

A PROCATALYST COMPOSITION CONTAINING SUBSTITUTED MALEIC OF FUMARIC ACID ESTERS AS ELECTRON DONOR FOR OLEFIN POLYMERIZATION

It is known that an electron donor together with a compound of tetravalent titanium on a magnesium halide carrier is us- able if it is a mono- or polyester of an unsaturated polycarboxylic acid in which at least two carboxyl groups are joined to conti- guous carbon atoms which form double bonds. It has now been observed that activity and stereospecificity increase if at least one of the said carbon atoms, or a carbon atom joined thereto by a double bond, is substituted by a hydrocarbon group having 1-20 carbon atoms. Maleic and fumaric acid esters substituted with the said hydrocarbon group can be mentioned as examples.

NOVEL PROPYLENE POLYMERS AND PRODUCTS THEREOF

The present invention concerns nucleated propylene polymers having a xylene soluble fraction at 23 .degree.C of less than 2.5 %, a crystallization temperature of over 124 .degree.C and a tensile modulus of greater than 2,000 MPa. These polymers can be prepared by nucleating a propylene polymer with a polymeric nucleating agent containing vinyl compound units, and by polymerizing propylene optionally with comonomers in the presence of a Ziegler-Natta catalyst system primarily transesterified with a phthalic acid ester - a lower alcohol pair to provide said propylene polymer. The catalyst contains a strongly coordinatin g external donor.

Polyethylene Composition for Injection Moulded Transport Packaging Articles

The present invention relates to a polyethylene composition wherein (i) the composition has an MFR2 of 0.1 to 100 g/10 min, (ii) the shear thinning index SHI(1,100) and the log MFR2 of the composition satisfy the following relation: SHI(1,100)≧−5.5 log MFR2 [g/10 min]/(g/10 min)+9.66, and (iii) the composition has a Charpy impact strength (23° C.) of 3 kJ/m2 or more. Furthermore, the present invention relates to a process for the production of said polyethylene resin as well as the use of the composition for the production of an injection moulded article, in particular a transport packaging or houseware article.

Injection moulding polymer

The use of a multimodal polyethylene composition comprising as comonomers to ethylene at least two C_4-12 alpha olefins in injection molding.

Process for polymerising olefins in the presence of an olefin polymerisation catalyst

Olefins are polymerised in the presence of a solid catalyst component and optionally a cocatalyst. The solid catalyst component is introduced into the polymerisation reactor by suspending the solid component into oil having a viscosity of from 20 to 1500 mPa s. Optionally, the suspension comprises a drag reduction agent dissolved in the oil. The suspension is metered into the polymerisation reactor by using a valveless piston pump.

METHOD AND APPARATUS FOR COATING PIPES

Method and apparatus for coating a pipe or a pipe section with a layer of at least one polymer. The method includes providing the pipe or the pipe section having an outer surface defining the periphery of the pipe or the pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle, which is mounted on a carriage capable of travelling along the periphery of the pipe or the pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe or the pipe section that is particularly useful for coating field joints in pipelines.

Polyolefin Composition for Medium/High/Extra High Voltage Cables with Improved Electrical Breakdown Strength

The present invention relates to a polyolefin composition comprising a polyolefin and aromatic compounds, comprising a naphthyl-group or at least two linked phenyl-groups, as stabilizers for use in producing medium and high voltage cables with improved electrical breakdown strength.

Рrосеss fоr pоlуmеrising оlеfins in thе prеsеnсе оf аn оlеfin pоlуmеrisаtiоn саtаlуst

Оlеfins аrе pоlуmеrisеd in thе prеsеnсе оf а sоlid саtаlуst соmpоnеnt аnd оptiоnаllу а сосаtаlуst. Тhе sоlid саtаlуst соmpоnеnt is intrоduсеd intо thе pоlуmеrisаtiоn rеасtоr bу suspеnding thе sоlid соmpоnеnt intо оil hаving а visсоsitу оf frоm 20 tо 1500 mРа s. Оptiоnаllу, thе suspеnsiоn соmprisеs а drаg rеduсtiоn аgеnt dissоlvеd in thе оil. Тhе suspеnsiоn is mеtеrеd intо thе pоlуmеrisаtiоn rеасtоr bу using а vаlvеlеss pistоn pump.

Рrосеss fоr pоlуmеrising оlеfins in thе prеsеnсе оf аn оlеfin pоlуmеrisаtiоn саtаlуst

Оlеfins аrе pоlуmеrisеd in thе prеsеnсе оf а sоlid саtаlуst соmpоnеnt аnd оptiоnаllу а сосаtаlуst. Тhе sоlid саtаlуst соmpоnеnt is intrоduсеd intо thе pоlуmеrisаtiоn rеасtоr bу suspеnding thе sоlid соmpоnеnt intо оil hаving а visсоsitу оf frоm 20 tо 1500 mРа s. Оptiоnаllу, thе suspеnsiоn соmprisеs а drаg rеduсtiоn аgеnt dissоlvеd in thе оil. Тhе suspеnsiоn is mеtеrеd intо thе pоlуmеrisаtiоn rеасtоr bу using а vаlvеlеss pistоn pump.

Verfahren zur Entfernung von flüchtigen Komponenten aus einem gefüllten thermoplastischen Polymer

Rohr mit verbesserter Hochtemperaturbeständigkeit

ß-nukleierte Polypropylen-Zusammensetzung

Kabel mit thermoplastischer Isolierung

Transparente leicht reissbare Folie

METHOD AND APPARATUS FOR DISCHARGING POLYMERIZATION REACTORS

A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention comprises continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.

SEMICONDUCTIVE POLYMER COMPOSITION

The invention relates to a semiconductive polymer composition for use in power cables. The composition comprises a multimodal ethylene homo- or copolymer produced in a polymerisation process comprising a single site catalyst whereby the polymer composition has a density of 870 to 930 kg/m3, a MFR2 of 1 to 30 g/l0min and a Mw/Mn of less than or equal to 10.

POLYETHYLENES OBTAINED BY USE OF DUAL SITE CATALYST

A polyethylene produced by the homopolymerisation of ethylene or copolymerisation of ethylene with a-olefins in the presence of a catalyst, characterized in that the fraction of low molecular weight polymers having MW<5000 g/mole is lower than 12 % by weight of the produced polymer, and that the produced polyethylene has a measured melt strength expressed by a haul-off (HO) value satisfying the expression: HO > K1 . .eta.0.05 + K2, wherein K1 is 9.10-5 and K2 is 0.4.

SCORCH-RETARDING POLYMER COMPOSITION

The present invention relates to crosslinkable polymer composition, comprising an unsaturated polyolefm having a total amount of carbon-carbon double bonds/ 1000 carbon atoms of at least 0.1, at least one scorch retarder, and at least one crosslinking agent.

UNIAXIALLY ORIENTED MULTILAYER FILM

The present invention provides a uniaxially oriented multilayer film comprising at least (i) a layer (A) and (ii) a layer (B), wherein said layer (A) comprises a linear low density polyethylene (LLDPE) comprising (e.g. selected from): - a multimodal LLDPE produced using a Ziegler Natta catalyst (znLLDPE), or - a LLDPE produced using a single site catalyst (mLLDPE) or - a mixture of a mLLDPE and a multimodal znLLDPE, said layer (B) comprises a multimodal LLDPE, and said multilayer film is in the form of a stretched film which is uniaxially oriented in the machine direction (MD) in a draw ratio of at least 1:3.

POLYETHYLENE COMPOSITION FOR PRESSURE PIPES WITH ENHANCED FLEXIBILITY

The present invention relates to a polyethylene composition comprising a base resin which comprises (a) an ethylene homo- or copolymer fraction (A); and (b) an ethylene homo- or copolymer fraction (B), wherein (i) fraction (A)has a lower weight average molecular weight than fraction (B); (ii) the base resin has a density of 932 to 938 kg/m3; (iii) the polyethylene composition has an MFR5 of 0.1 to 0.6 g/10 min; and (iv) the polyethylene composition has a shear stress .eta.2.7 kPa of 85 to 230 kPas. Furthermore, the present invention relates to an article, preferably a pipe comprising said composition and to the use of said composition for the production of an article, preferably a pipe.

A PROCATALYST FOR POLYMERIZATION OF OLEFINS CONTAINING A TRANS-ESTERIFICATION PRODUCT OF A LOWER ALCOHOL AND A PHTHALIC ACID ESTER

In the invention a procatalyst composition intended for the polymerization o f olefins has been provided, which has been prepared by bringing together magnesium chloride, a lower alcohol, a titaniu m compound and an ester of phthalic acid. The procatalyst composition is active and stereospecific and it simultaneously h as a titanium and phthalic acid content as low as pos- sible. These good properties have been achieved by carrying out a trans- esterification between the lower alcohol and the ester of the phthalic acid, whereby the alcoxy group of the phthalic acid comprises a t least five carbon atoms.

NEW HOMOGENEOUS OLEFIN POLYMERIZATION CATALYST COMPOSITION

Homogeneous olefin polymerization catalyst compositions prepared by contacti ng a) a metallocene of the general formula (1): (CpYq)mMXnZo, wherein Cp is one of a mono- or polysubstituted, fused or non-fused, homo- (= iso-) or heterocyclic cyclopentadienyl ligand, Y is a substituent at the cyclopentadienyl ring and is one of an -OR, -SR, -NR2, -C(H or R)=, or -PR2 radical, M is a transition metal of Group 4 of the Periodic Table and bound to the ligand or ligands Cp in at least an 5 bonding mode; X is bound to M and is one of a hydrogen, a halogen, a C1-C8 hydrocarbyl group, a C1-C8 hydrocarbylheteroatom (O, S, N, P) group or a tri-C1-C8 hydrocarbyl silyl group or two X form together with M a C4-C20 metallocyclic ring structure; Z is a bridge atom or group between two Cp ligands or between one Cp ligand an d the transition metal M; q is 0-5; m is 1 or 2; m.q 1; o is 0 or 1; and n is 4- m-o, except when there is a bridge Z between two Cp ligands, in which case n is 4-m, and b) an aluminoxane ...

Modified polypropylene composition

The invention relates to a polypropylene composition a heterophasic propylene copolymer, an elastomeric copolymer and inorganic filler and to a method for producing the propylene composition using peroxides. The composition is characterised by a combination of excellent impact strength, stiffness, elasticity and surface stability.

HIGH MELT FLOW HETEROPHASIC POLYPROPYLENE COPOLYMERS

The present invention relates to a heterophasic polypropylene composition with a high melt flow rate for processability, a good stiffness and an improved compression performance. These compositions may be employed for the production of moulded articles, in particular injection moulded articles such as thin-walled plastic cups. Furthermore, the invention relates to a process for preparing the inventive polymer compositions.

Process and apparatus for producing olefin polymers

The present invention concerns a process and an apparatus for continuous polymerisation of olefin monomers. In particular, the present invention concerns a process and an apparatus for continuous polymerisation olefin monomers like ethylene and other monomers, wherein an olefin monomer is polymerised in slurry phase in an inert hydrocarbon diluent in at least one loop reactor. According to the invention, a polymer slurry is continuously withdrawn from the loop reactor and concentrated. The concentrated slurry is conducted to a flash unit in order to remove the remaining fluid phase, and gas obtained is compressed in a flash gas compressor before it is being fed to a distillation section. By means of the present invention it is possible reduce the size of the flash gas compressor and the capacity of the distillation sections. This significantly reduces investment cost for a continuously operated polymerization apparatus.

Polyolefin composition for medium/high/extra high voltage cables with improved electrical breakdown strength

The present invention relates to a polyolefin composition comprising a polyolefin and aromatic compounds, comprising a naphthyl-group or at least two linked phenyl-groups, as stabilizers for use in producing medium and high voltage cables with improved electrical breakdown strength.

Рrосеss fоr pоlуmеrising оlеfins in thе prеsеnсе оf аn оlеfin pоlуmеrisаtiоn саtаlуst

Оlеfins аrе pоlуmеrisеd in thе prеsеnсе оf а sоlid саtаlуst соmpоnеnt аnd оptiоnаllу а сосаtаlуst. Тhе sоlid саtаlуst соmpоnеnt is intrоduсеd intо thе pоlуmеrisаtiоn rеасtоr bу suspеnding thе sоlid соmpоnеnt intо оil hаving а visсоsitу оf frоm 20 tо 1500 mРа s. Оptiоnаllу, thе suspеnsiоn соmprisеs а drаg rеduсtiоn аgеnt dissоlvеd in thе оil. Тhе suspеnsiоn is mеtеrеd intо thе pоlуmеrisаtiоn rеасtоr bу using а vаlvеlеss pistоn pump.

Magnesium, Titan, ein Halogen und ein Elektronendonator enthaltende Katalysatorkomponente, ihre Herstellung und Verwendung

Herstellung eines Katalysatorbestandteils zur Olefinpolymerisation

Herstellung von geträgerten Katalysatoren für die Olefinpolymerisation

POLYPROPYLEN-BLASFOLIE

Multimodale Polyethylenzusammensetzung für Rohre

VERNETZBARE POLYETHYLENZUSAMMENSETZUNG, DIESE ENTHALTENDES ELEKTROKABEL UND HERSTELLUNGSVERFAHREN DAFÜR

Polyolefin-Zusammensetzung mit geringer Migration und einem Vitamin-E-artigen Stabilisator

Kabelschicht aus modifiziertem weichem Polypropylen

Kurzkettig verzweigtes Polypropylen

Eine Polyolefinzusammensetzung mit verbessertem Weissbruchwiderstand

POLYETHYLENE COMPOSITION FOR THE PRODUCTION OF PEROXIDE CROSSLINKED POLYETHYLENE

The invention relates to a polyethylene composition for the production of peroxide crosslinked polyethylene and a method for the production thereof. The invention further relates to the use of such a polymer composition and to a peroxide crosslinked polyethylene pipe made from the polyethylene composition.

AN INSULATING COMPOSITION FOR COMMUNICATION CABLES

An insulating composition for communication cables (2) is disclosed as well as a telesingle wire (2) which comprises the insulating composition and a telecommunication cable (1) which comprises a plurality of telesingle wires (2) including the insulating composition. The insulating composition comprises a multimodal olefin poll(mer mixture, obtained by polymerisation of at least one .alpha.-olefin in more than one stage having a density of about 0.920-0.965 g/cm3, a melt flow rate (MFR2) of about 0.2-5 g/10 min, an FRR21/2 .gtoreq. 60, and an environmental stress cracking resistance (ESCR) according to ASTM D 1693 A/10 % Igepal, of at least 500 hrs, said olefin polymer mixture comprising at least a first and a second olefin polymer, of which the first is selected from (a) a low molecular weight (MW) olefin polymer with a density of about 0.925-0.975 g/cm3 and a melt flow rate (MFR2) of about 300-20 000 g/10 min, and (b) a high molecular weight (MW) olefin polymer with a density of about ...

SEMICONDUCTIVE POLYMER COMPOSITION

The present invention relates to a semiconductive polymer composition comprising a olefin homo- or copolymer wherein the composition has a direct current volume resistivity of less than 1000 Ohm.cm at 90 ~C, an elongation at break which after aging for 240 hours at 135 ~C does not change by more than 25 %, and a total number of structures of 20 or less in the SIED test. Furthermore, the present invention relates to an electric power cable comprising a conductor, a semicoducting layer and, adjacent to the semiconducting layer, an insulation layer, wherein the semiconducting layer is formed by said semiconductive polymer composition and to the use of said semiconducting polymer composition for the production of a semiconductive layer of an electric power cable.

PROCESS FOR PRODUCING A HOMOGENEOUS POLYETHYLENE MATERIAL IN THE PRESENCE OF A CATALYST

The present invention concerns a process for producing homogeneous polyethylene materials and processes for making high density, medium density and low density films therefrom. The process comprises producing a polyethylene composition in a multistage reaction sequence of successive polymerization stages in the presence of an ethylene- polymerizing catalyst system. According to the invention, the process is carried out using an unsupported catalyst comprising magnesium and titanium as active constituents, in at least one loop polymerization stage and at least one gas phase polymerization stage and, operated with different amounts of hydrogen and comonomers to produce a high molecular weight portion in one of the polymerization stages and a low molecular weight portion in another so as to provide a polyethylene composition with the low molecular weight part having an MFR2 of 250 g/10 min or more. By means of the process it is possible to obtain homogeneous bimodal polyethylene material.

PREPARATION OF OLEFIN POLYMERISATION CATALYST COMPONENT

A process for producing a Gp 2/transition metal olefin polymerisation catalyst component, in which a Gp 2 metal complex is reacted with a transition metal compound so as to produce an oil-in-oil emulsion, the disperse phase containing the preponderance of the Mg being solidified by heating to provide a catalyst component of excellent morphology. Polymerisation of olefins using a catalyst containing such a component is also disclosed. The process may be employed in the production of Ziegler-Natta catalysts.

PIPE HAVING IMPROVED HIGH TEMPERATURE RESISTANCE

The present invention relates to a pipe made of a polyethylene composition comprising a polyethylene base resin, which comprises c. an ethylene copolymer as fraction (A), and d. an ethylene homo- or copolymer as fraction (B), with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), the base resin having (i) a density of below 940 kg/m3, and (ii) a MFR5 at 190 °C / 5.00 kg of at least 0.20 g/10 min, and the polyethylene composition having a time to failure of at least 250 h measured according to ISO 1167 at 95°C and 4.3 MPa.

MULTIMODAL POLYETHYLENE RESIN FOR PIPE MADE BY A SINGLE-SITE CATALYST

The present invention relates to a polyethylene composition comprising a polyethylene base resin, which comprises a. an ethylene copolymer as fraction (A), and b. an ethylene homo- or copolymer as fraction (B), with fraction (A) having a lower molecular weight than fraction (B), wherein the polyethylene base resin is obtainable in a polymerisation process in which a single-site catalyst (SSC) is used in the polymerisation of at least one of fractions (A) and (B), and the base resin has (i) a density of below 940 kg/m3, and (ii) a MFR2 at 190 °C / 2.16 kg of 0.001 to 10 g/10 min, and the composition has (iii) a flexural modulus of from 300 to 820 MPa, and to a process for the production of such a composition, and to a pipe produced from such a composition.

A SILICON CONTAINING COMPOUND AS DRYING AGENT FOR POLYOLEFIN COMPOSITIONS

The present invention relates to the use of a silicon containing compound as drying agent of a polyolefln composition comprising a crosslinkable polyolefin with hydrolysable silane groups, wherein the silicon containing compound has a structure according to the formula (R1)X[Si(R2)y(R3)z]m wherein R1, which may be the same or different if more than one such group is present, is a monofunctional, or, if m = 2, is a bifunctional, hydrocarbyl residue comprising from 1 to 100 carbon atoms; R2, which may be the same or different if more than one such group is present, is a hydrocarbyloxy residue comprising from 1 to 100 carbon atoms; R3, is -R4SiR1 PR2 q, wherein p is 0 to 3, q is 0 to 3, with the proviso that p + q is 3, and R4 is -(CH2)rYs(CH2)t- where r and t independently are 1 to 3, s is 0 or 1 and Y is a difunctional heteroatomic group selected from -O-, -S-, -SO-, -SO2-, -NH-, -NR1- or -PR1-, where R1 and R2 are as previously defined; and x is 0 to 3, y is 1 to 4, z is 0 or 1, with the ...

Mixing device

A mixing device for compounding polymers by elongational deformation is described. The device has a casing (1) with an inlet (2) and an outlet (3). The casing has inner walls (4) defining an enclosure (5) which communicates with the inlet and the outlet. A core (6) is arranged in the enclosure and defines a mixing space (7) between the core (6) and the enclosure wall (4). The mixing space (7) is divided into several slits (9) and chambers (10) by protrusions (8). The device is characterised in that the enclosure (5) and the core (6) are concentrically arranged around a common axis (A) and are conically tapered towards the outlet (3), and that the protrusions (8) are circumferentially arranged on at least one of the core (6) and the enclosure wall (4) with a slit gap in the range from about 0.5 mm to about 10 mm and a width of the slit gap in the range of 0 to about 5 mm. Preferably, the enclosure wall (4) and the core (6) are adjustable relative to each other for adjustment of the slit ...

Flame retardant polyethylene composition comprising polypropylene

The present invention relates to a flame retardant polymer composition comprising (A) a polyethylene, (B) a silicone-group containing compound, (C) an inorganic filler material, and (D) a polypropylene in an amount of 0.1 to 10 wt. % with respect to the total composition, to an article comprising said flame retardant polymer composition, in particular to a wire or cable comprising a layer made of said flame retardant composition and to the use of said flame retardant polymer composition for the production of a layer of a wire or cable. Furthermore, the invention relates to the use of a polypropylene in the production of a flame retardant layer for a wire or cable as a processing aid.

Propylene polymer compositions

The invention relates to propylene polymer compositions comprising 45-79 parts per weight of a propylene homo- or copolymer, 10-27 parts per weight of a first elastomeric ethylenepropylene copolymer, 5-22 parts per weight of a second elastomeric ethylene-propylene copolymer, 1-15 parts per weight of an elastomeric ethylene-1-octene copolymer and 5-15 parts per weight of inorganic filler. The propylene polymer compositions are suitable for injection molding of large articles, which do not show flow marks and which have a good impact strength/stiffness ratio.

Catalysts

A complex containing a ligand of formula (I): useful in the formation of olefin polymerization catalysts and their use in olefin polymerization.

Polymer for rotomoulding

The invention provides a process for the preparation of a moulded polymer item, said process comprising obtaining a polymer moulding powder having a mean particle size of 1 to 2000 mum comprising an admixture of UV-stabilizer-loaded polymer particles and non-UV-stabilizer-loaded polyolefin polymer particles, loading said powder into a mould, heating and rotating said mould to melt said powder, cooling said mould, and releasing said moulded polymer item from said mould.

PROPYLENE POLYMERS WITH IMPROVED PROPERTIES

The invention relates to novel propylene polymers with improved properties especially with improved stiffness and impact strength comprising propylene homopolymers or propylene block copolymers with 90.0 to 99.9 wt % propylene and 0.1 to 10 wt % α-olefins with 2 or 4 to 18 carbon atoms, or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are β-nucleated propylene polymers, whereby the β-nucleated propylene homopolymers have an Irτ≧0.98 and the values for tensile modulus and Charpy impact strength as specified herein. The β-nucleated propylene block copolymers are polymers having an IRτ of the propylene homopolymer block of ≧0.98 and the values for tensile modulus and Charpy impact strength as also specified herein. The propylene polymers with an improved property spectrum are suitable for producing molded parts in a pipe system, such as pipes and fittings, inspection chambers, pipe ducting systems, extrusion or compression molded sheets and the like.

INSPEKTIONSAPPARAT FÜR DEFORMIERTE ROHRE

STABILISIERTE POLYMERZUSAMMENSETZUNG

Verwendung von Polysulphiden zur Stabilisierung von vernetzen Silangruppen enthaltenden Polymeren

Terpolymer mit hohem Schmelzpunkt

Vernetzbare Polyolefinzusammensetzung mit Dihydrocarbylzinndicarboxylat als Silanolkondensationskatalysator

Multimodale Polyethylenzusammensetzung mit verbesserter Homogenität

Verfahren zur Herstellung schlagfester Rohre

STABILIZATION OF CROSS-LINKED SILANE GROUP CONTAINING POLYMERS

The present invention relates to a composition for cross-linking and stabilization of a polymer containing hydrolysable silane groups comprising a sulphonic acid as a silanol condensation catalyst characterized in that it comprises a stabilizer which is neutral or acidic, does not contain ester groups and is a compound according to formula (I): wherein R is an unsubstituted or substituted aliphatic or aromatic hydrocarbyl radical which may comprise heteroatoms, R' is a hydrocarbyl radical, R" is a hydrocarbyl radical and R' and/or R" being a bulky radical, X1, X2 or X3 is the same or different H or OH, whereby at least X1, X2 or X3 is OH, and n is 1 to 4; or a compound according to formula (II): wherein R"' is an aliphatic hydrocarbyl radical and p is 1 to 6; or a mixture of any of such compounds, to a stabilized polymer comprising the above stabilizers and to a process for cross- linking and stabilization of silane group containing polymers in the presence of the above mentioned stabilizers ...

PRESSURELESS PIPE COMPRISING A MULTIMODAL POLYETHYLENE COMPOSITION WITH AN INORGANIC FILLER

The present invention relates to a pipe or a supplementary pipe article comprising a polyethylene composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower average molecular weight than fraction (B), the base resin has a flexural modulus determined according to ISO 178 of 1000 MPa or higher, and the composition further comprises (C) an inorganic mineral filler, wherein inorganic mineral filler (C) is present in the composition in an amount of 1 to 70 wt.%, and to the use of said composition for the production of a pipe or a supplementary pipe article.

METHOD AND APPARATUS FOR COATING PIPES

Method and apparatus for coating a pipe (2) or a pipe section with a layer of at least one polymer. The method comprises providing a pipe (2) or a pipe section having an outer surface defining the periphery of the pipe or pipe section; applying on the outer surface of the pipe or pipe section a layer of at least one polymer material in melt stage using a nozzle (3), which is mounted on a carriage capable of travelling along the periphery of the pipe (2) or pipe section; and moving the carriage along at least a part of the periphery during the application of the polymer material to form a layer on the surface of the pipe (2) or pipe section. The present invention is particularly useful for coating field joints in pipelines.

METHOD FOR PREPARING ACTIVE CARRIER PARTICLES OF EQUAL SIZE FOR A POLYMERIZATION CATALYST

The active carrier particles of even size of the polymerization catalyst are prepared so that a melt of a complex composition is provided having the formula (I): MgCl2 nROH mED, in which ROH depicts an aliphatic alco- hol, R is a C1-C6 alkyl, ED de- picts an electron donor, n is 1 to 6 and m is 0 to I ; the melt pro- vided is fed to a nozzle (4); the melt is sprayed from the nozzle (4) to the spraying area (5), in which it is divided into fine mel droplets and possibly partly so- lidifies; the possibly partly so- lidified melt particles are trans- ferred to a cooled crystallization area (6), where they crystallize to solid carrier particles; and the solid carrier particles are rec- overed. The melt mentioned is sprayed through a nozzle (4), which is rotated or which has attached to it a member that ro- tates and throws melt outwards from the rotating center to the spraying area (5).

COARSE GRAINED POLYOLEFIN, PRODUCTION THEREOF AND A PROCATALYST CONTAINING A TRANSESTERIFICATION PRODUCT BETWEEN A LOWER ALCOHOL AND DIOCTYLPHTHALATE USED THEREFORE

The invention relates to a method for preparing polyolefins. In the polymerization, a procatalyst composition is being used, which has been prepared by contacting MgCI2, a lower alcohol, a titani um compound and a phthalic acid ester. The po- lyolefin is given the adequate coarseness by using a pracatalyst of the said type, which has been prepared by carrying out a transesterification between the lower alcohol and the phthalic acid ester an d by selecting dioctyl phthalate (DOP) as phthal- ic acid ester.

METHOD FOR THE PREPARATION OF A CATALYST COMPONENT FOR THE POLYMERIZATION OF OLEFINS, A POLYMERIZATION CATALYST COMPONENT PRODUCED BY THE METHOD AND USE OF THE SAME

The invention relates to a method for the preparation of a solid procatalyst composition for a catalyst system intended for the polymerization of olefins, wherein a magnesium halide, such as magnesium chloride, is dissolved and/or slurried in a mono- carboxylic acid alkyl ester, such as ethyl acetate, is impregnated into a support material, dried, treated with an organometallic compound or a silicon compound and thereafter with a transition metal compound. The invention also relates to such a procatal- yst composition and its use together with a cocatalyst for the polymerizatio n of olefins. According to the invention it has been possible to increase the activity of the catalyst composition by using a silanated support material, such as silanated silica, which is then treated with an organometallic or silicon compound before treatment wit h a transition metal compound. The silanated silica is preferably a silicon dioxide which has been heat-treated at 100-200 .degree.C and thereafter treated ...

SUPPORTED OLEFIN POLYMERIZATION CATALYST, ITS PREPARATION AND USE

Until now, olefin polymerization catalysts based on a metallocene, an alumox ane and a support have been highly uneven in quality. A new process had now been developed for the preparation of a supported olefin polymerization catalyst, wherein (a) a metallocene/acti vator reaction product, a solvent capable of dissolving it, and a porous support a re brought into mutual contact, and (b) the solvent is r emoved, and wherein step (a) is carried out so that the porous support is impregnate d with an amount at maximum its pore volume of the metallocene/activator reaction product and solvent.

MULTIMODAL POLYETHYLENE COMPOSITION FOR PIPES

Process for the preparation of an olefin polymerisation catalyst

This invention relates to a process for the preparation of an olefin polymerisation catalyst, to the use of the catalyst in olefin polymerisation and to the catalyst and polymers obtained. In particular, the invention relates to the preparation of a catalyst comprising an organometallic compound of a transition metal of Group 3 to 10 of the Periodic Table (IUPAC) by a semi-continuous or continuous process.

Discolour-free silanol condensation catalyst containing polyolefin composition

The present invention relates to a polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst, and (A) a compound containing one or more POm(OnR)(OoR)(OpR) groups, wherein R, R, and R are the same or different organic residues; m is 0 or 1; n, o, and p each are 0 or 1; and n+o+p=1 to 3; a master batch for a crosslinkable polyolefin composition comprising a polymer and a silanol condensation catalyst and component (A), a stabilized polyolefin containing cross-linked silane groups wherein cross-linking has been performed by the use of a silanol condensation catalyst, further comprising component (A), and to the use of component (A) for stabilizing a polyolefin composition comprising a crosslinkable polyolefin with hydrolysable silane groups and a silanol condensation catalyst. The polyolefin composition of the invention can be used for pipe, wire & cable, film, fiber and molding applications.

Method for the modification of polyolefins

A process for obtaining a polyolefin composition endowed with improved adhesion performance, especially paintability, comprising premixing a high-flow polyolefin resin with one or more grafting monomers and initiator, possibly also one or more comonomers, feeding the obtained premix and a low-flow polyolefin resin into a mixing device, and gradually heating the components to above their melting points while being subjected to mixing forces. The process may be carried out in an extruder, and polyether amine may optionally be introduced into the extruding mass downstream of the feeding point.

Рrосеss fоr pоlуmеrising оlеfins in thе prеsеnсе оf аn оlеfin pоlуmеrisаtiоn саtаlуst

Оlеfins аrе pоlуmеrisеd in thе prеsеnсе оf а sоlid саtаlуst соmpоnеnt аnd оptiоnаllу а сосаtаlуst. Тhе sоlid саtаlуst соmpоnеnt is intrоduсеd intо thе pоlуmеrisаtiоn rеасtоr bу suspеnding thе sоlid соmpоnеnt intо оil hаving а visсоsitу оf frоm 20 tо 1500 mРа s. Оptiоnаllу, thе suspеnsiоn соmprisеs а drаg rеduсtiоn аgеnt dissоlvеd in thе оil. Тhе suspеnsiоn is mеtеrеd intо thе pоlуmеrisаtiоn rеасtоr bу using а vаlvеlеss pistоn pump.

Рrосеss fоr pоlуmеrising оlеfins in thе prеsеnсе оf аn оlеfin pоlуmеrisаtiоn саtаlуst

Оlеfins аrе pоlуmеrisеd in thе prеsеnсе оf а sоlid саtаlуst соmpоnеnt аnd оptiоnаllу а сосаtаlуst. Тhе sоlid саtаlуst соmpоnеnt is intrоduсеd intо thе pоlуmеrisаtiоn rеасtоr bу suspеnding thе sоlid соmpоnеnt intо оil hаving а visсоsitу оf frоm 20 tо 1500 mРа s. Оptiоnаllу, thе suspеnsiоn соmprisеs а drаg rеduсtiоn аgеnt dissоlvеd in thе оil. Тhе suspеnsiоn is mеtеrеd intо thе pоlуmеrisаtiоn rеасtоr bу using а vаlvеlеss pistоn pump.

KRISTALLISATIONSVORRICHTUNG UND IHRE ANWENDUNG ZUR GEWINNUNG VON KRISTALLEN

LEITPLANKENSYSTEM

Verfahren und Vorrichtung zur Herstellung von Olefinpolymeren

Hochtemperatur PP Klebstoff

Polyolefinzusammensetzung mit verbesserter Resistenz gegenüber CIO2-enthaltenden wasser

COATED PIPES HAVING IMPROVED MECHANICAL PROPERTIES AND A METHOD OF PRODUCTION THEREOF

The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 6 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol, the ratio of the weight average molecular weight to the number average molecular weight, Mw/Mn, of from 15 to 50, a melt index MFR2 of from 0.05 g/10 min to 5 g/10 min, a melt index MFR5 of from 0.5 to 10 g/10 min and a density of from 930 kg/m3 to 955 kg/m3. The pipes can be coated with high throughput and good production economy. The coatings have good mechanical properties.

PIPE COMPRISING SUPER SLOW CRACK GROWTH RESISTANT POLYETHYLENE

A pipe or a supplementary pipe article comprising a polyethylene composition comprising a base resin which comprises: (A) a first ethylene homo- or copolymer fraction having an MFR2 in the range of 300 to 700 g/10 min, and (B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower average molecular weight than fraction (B), wherein the base resin has a density in the range of 0.945 to 0.949 kg/cm3 and an MFR5 in the range of 0.2 to 0.4 g/10 min and a comonomer content of higher than 2.0 wt.-% and a SHI(2.7/210) in the range of 55 to 100.

LOW TEMPERATURE PE TOPCOAT

The present invention concerns the use of a particular ethylene polymer for providing coating compositions displaying improved values for elongation at break at -45°C, rendering coating compositions prepared in accordance with the present invention suitable for low temperature applications.

CABLE-SHEATHING COMPOSITION

A cable-sheathing composition and its use as outer sheath for a power cable or a communication cable are disclosed. The cable-sheathing composition is a multimodal, preferably bimodal, mixture of olefin polymers, preferably ethylene plastics, having a density of about 0.915-0. 955 g/cm3 and a melt flow rate of about 0.1-3.0 g/10 min, said olefin polymer mixture comprising at least a first and a second olefin polymer, of which the first has a density and a melt flow rate selected from (a) about 0.930-0.975 g/cm3 and about 50-2000 g/10 min and (b) about 0.88-0.93 g/cm3 and about 0.01-0.8 g/10 min. Preferably, the olefin polymer mixture has been obtained by coordination-catalysed polymerisation of at least one .alpha.-olefin in several stages, preferably two stages consisting of a loop reactor/a gas-phase reactor or a gas-phase reactor/ a gas-phase reactor, through polymerisation or copolymerisation of ethylene in the first stage and copolymerisation of ethylene with butene, 4-methyl-1- pentene ...

STEREOSELECTIVE CATALYST FOR THE POLYMERIZATION OF OLEFINS

In the invention a procatalyst of a catalyst system of a new type intended for the polymerization of olefins has been prepared comprising a carrier based on a magnesium compound, a titanium compound and a dialkylester of phthalic acid. The most important properties of this kind of a procatalyst are the high stereoselectivity and the high activity. Now it has been possible to increase the activity considerably by using a different kind of dialkylester of phthalic acid having in its alkyl 9 to 20 carbon atoms and the dielectricity constant of which being preferably below 5 measured at 25.degree.C.

CROSSLINKABLE POLYOLEFIN COMPOSITION COMPRISING DIHYDROCARBYL TIN DICARBOXYLATE AS SILANOL CONDENSATION CATALYST

Semiconductive polymer composition

The present invention provides a semiconductive polymer composition having (a) from 30 to 90 wt % of a polymer component, (b) from 10 to 60 wt % of carbon black and (c) from 0 to 8 wt % additives, based on the total semiconductive polymer composition, and wherein the composition comprises less than 23 particles per m2 having a width of larger than 150 mum at the half height of a particle protruding from the surface of the tape sample, less than 10 particles per m2 having a width of larger than 200 mum at the half height of a particle protruding from the surface of the tape sample, and preferably, about 0 particles per m2 having a width of larger than 500 mum at the half height of a particle protruding from the surface of the tape sample.

Outer sheath layer for power or communication cable

The present invention relates to a polyethylene composition, comprising a base resin which comprises (i) a first fraction which is an ethylene homo- or copolymer, and (ii) a second fraction which is an ethylene copolymer, wherein the first fraction (i) has a lower weight average molecular weight than the second fraction (ii), and the base resin has a density of less than 0.940 g/cm3 and a shear thinning index SHI2.7/210 of at least 25.

POLYETHYLENE COMPOSITION FOR THE PRODUCTION OF PEROXIDE CROSSLINKED POLYETHYLENE

The invention relates to a polyethylene composition for the production of peroxide crosslinked polyethylene and a method for the production thereof. The invention further relates to the use of such a polymer composition and to a peroxide crosslinked polyethylene pipe made from the polyethylene composition. 1. A method for production of a peroxide crosslinked polyethylene comprising soaking a polyethylene composition in the form of pellets in peroxide , the polyethylene composition having a density of 920-973 kg/mand a MFRof 0.05-35 , the pellets having an average pellet particle size an average pellet particle size of 0.006 cmto 0.020 cm , wherein the polyethylene in the form of pellets is crosslinkable to a degree of crosslinking of at least 70% , as measured according to ASTM D2765-95 , and wherein the polyethylene in the form of pellets has a bulk density of about 550 kg/mas measured according to ASTM D1895-89.2. A method according to claim 1 , further comprising forming a peroxide crosslinked polyethylene pipe from the peroxide crosslinked polyethylene.3. A method according to claim 2 , wherein forming comprises moulding.4. A pipe comprising a peroxide crosslinked polyethylene composition claim 2 , wherein the peroxide crosslinked polyethylene composition is prepared by soaking a polyethylene composition in the form of pellets in peroxide claim 2 , the polyethylene composition having a density of 920-973 kg/mand a MFRof 0.05-35 claim 2 , the pellets having an average pellet particle size an average pellet particle size of 0.006 cmto 0.020 cm claim 2 , wherein the polyethylene in the form of pellets is crosslinkable to a degree of crosslinking of at least 70% claim 2 , as measured according to ASTM D2765-95 claim 2 , and wherein the polyethylene in the form of pellets has a bulk density of about 550 kg/mas measured according to ASTM D1895-89. This application is a Divisional of Ser. No. 10/543,421, filed 26 Jul. 2005 in the United States, which is a National ...

Catalysts

A complex containing a ligand of formula (I): useful in the formation of olefin polymerization catalysts and their use in olefin polymerization.

CATALYST PREPARATION USING H2

The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerization catalyst component in particulate form having improved polymerization properties due to the use of Hduring catalyst component preparation and the use of such catalyst components in a process for polymerizing olefins. 118-. (canceled)19. A process for producing homo- or copolymers by polymerizing C2 to C10 α-olefins or combinations thereof using an olefin polymerization catalyst , said catalyst comprises an alkylaluminium cocatalyst; andparticles of a catalyst component prepared by steps comprisinga) preparing a solution of a complex of a Group 2 metal and an electron donor by reacting a compound of said metal with said electron donor or a precursor thereof in an organic liquid reaction medium,b) adding said solution of said complex to at least one compound of a transition metal to produce an emulsion, wherein the dispersed phase of which is in the form of droplets and contains more than 50 mol % of the Group 2 metal in said complex,c) agitating the emulsion in order to maintain the droplets of said dispersed phase within said predetermined average size range,d) solidifying said droplets of the dispersed phase,e) washing the solidified particles at least once,f) drying the solidified particles or slurring the solidified particles to an oily liquid without drying and optionallyg) recovering the dried or slurried solidified particles of the catalyst component,wherein H2-gas is added to at least one of the production steps a) to g).20. The process according to claim 19 , wherein said catalyst component is produced under oxygen and moisture free conditions.21. The process according to claim 19 , said catalyst further comprising an external electron donor.22. The process according to claim 19 , wherein the homo- or copolymers have a MWD of 3.8 or less and/or having a XS below 3 wt %.23. The process according to claim 19 , wherein the homo- or copolymers have a MWD of 3.6 ...

GLASS FIBER REINFORCED POLYPROPYLENE

The present invention concerns a glass fiber reinforced polypropylene composition as well as articles formed from this composition, wherein the composition, comprises a) More than 15-wt % glass fibers, and b) a specific heterophasic polypropylene composition with an at least bimodal disperse phase. 1. A composition , comprisinga) more than 15-wt % glass fibers, andb) a heterophasic polypropylene composition comprising a matrix phase and at least two disperse elastomeric components, wherein the heterophasic polypropylene composition has an overall comonomer content of 12-wt % or more, and wherein the at least two disperse elastomeric components have a comonomer content of 20-wt % or more.2. The composition of claim 1 , wherein the comonomer is ethylene.3. The composition of or claim 1 , wherein the disperse phase of the heterophasic polypropylene consists of two phases.4. The composition of or claim 1 , wherein the composition comprises from 20 to 40-wt % of the glass fibers.5. The composition of or claim 1 , wherein the heterophasic polypropylene composition displays an overall MFRof from 9 to 15 g/10 min claim 1 , and the matrix phase of the heterophasic polypropylene composition displays an MFRof from 30 to 70 g/10 min.6. The composition of or claim 1 , wherein the composition further comprises up to 20-wt % of an elastomeric ethylene copolymer with an alpha-olefin having from 6 to 12 carbon atoms.7. The composition of or claim 1 , wherein the composition comprises from 50 to 70-wt % of the heterophasic polypropylene composition.8. The composition of or claim 1 , wherein the composition further comprises an additive selected from antioxidants claim 1 , stabilizers claim 1 , coloring agents claim 1 , UV stabilizers claim 1 , nucleating agents claim 1 , antistatic agents claim 1 , slip/mold release agents claim 1 , and coupling agents claim 1 , wherein the additive is present in amounts of 2-wt % each or less.9. A molded article comprising the composition of or .10. ...

CATALYST WITH LOW SURFACE AREA

Catalyst in form of solid particles, wherein the particles—have a specific surface area of less than 20 m/g, comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table (IUPAC) or a compound of actinide or lanthanide, comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table (IUPAC), and—comprise solid material, wherein the solid material does not comprise catalytically active sites, has a specific surface area below 500 m/g, and has a mean particle size below 100.

LOW TEMPERATURE PE TOPCOAT

The present invention concerns the use of a particular ethylene polymer for providing coating compositions displaying improved values for elongation at break at −45° C., rendering coating compositions prepared in accordance with the present invention suitable for low temperature applications. 110-. (canceled)11. A method for extending the service lifetime of a rigid substrate at temperatures of −45° C. or lower , the method comprising coating the rigid substrate with an ethylene polymer comprising from 80 to 100% by weight of ethylene repeating units and from 3.5 to 4.5% by weight of α-olefin comonomer repeating units , based on total weight of the ethylene polymer , wherein the ethylene polymer comprises a density of between 0.937 and 0.945 g/cmwhen measured according to ISO 1183 D and an elongation at break at −45° C. of at least 150% when measured according to GOST 11262.12. The method of claim 11 , wherein the α-olefin comonomer repeating units are derived from C-Cα-olefins.13. The method of claim 11 , wherein the ethylene polymer has a melt flow rate (MFR) ranging from 0.2 to 1.0 g/10 min when measured according to ISO 1133 D.14. The method of claim 11 , wherein the ethylene polymer is a multimodal ethylene polymer.15. The method of claim 11 , wherein the ethylene polymer is a bimodal ethylene polymer.16. The method of claim 11 , wherein the ethylene polymer is a reactor blend.17. The method of claim 11 , wherein the α-olefin comonomer is derived from 1-butene.18. The method of claim 11 , wherein the ethylene polymer has a density ranging from 0.939 to 0.941 g/cmwhen measured according to ISO 1183 D.19. The method of claim 11 , wherein the ethylene polymer is further compounded with additives for coating applications.20. The method of claim 12 , wherein the ethylene polymer has a melt flow rate (MFR) ranging from 0.2 to 1.0 g/10 min when measured according to ISO 1133 D.21. The method of claim 12 , wherein the ethylene polymer is a multimodal ethylene polymer. ...

EQUIPMENT AND PROCESS FOR PRODUCING POLYMER PELLETS

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets. 119-. (canceled)20. A process for producing polymer pellets which comprise one or more polymer components and one or more further components , wherein in said process at least one of said further component(s) is incorporated into pellets by applying said at least one further component(s) onto said pellets , said process comprising: an inlet for feeding polymer pellets into said first mixing apparatus,', 'a first mixing section provided with mixing means for moving and mixing a pellet stream along said section,', 'at least one application means for applying said at least one further component(s) onto fed polymer pellets at one or more positions, and', 'an outlet for removing the mixed pellet stream from said first mixing section;, 'providing at least one first mixing apparatus comprising,'}feeding polymer pellets in said first mixing section arranged to cause the fed polymer pellets to flow and mix through one or more of the following movements selected from the group consisting of vibration, oscillation and fluidization,applying said at least one further component(s) via said at least one application means onto the polymer pellets at a position selected from one or more of prior to said apparatus, at said inlet of said apparatus and/or within said first mixing section of said apparatus and recovering the obtained pellets in a conventional manner.21. The process according to claim 20 , wherein said fed pellet stream flows and the pellets mix at least by vibrating and/or oscillating movement along the longitudinal axis of the first mixing section from the inlet towards the outlet arranged at the other end in the ...

Polyolefin Composition for Medium/High/Extra High Voltage Cables with Improved Electrical Breakdown Strength

This application relates to a polyolefin composition comprising a polyolefin and an aromatic compound. The polyolefin composition can be used in producing medium and high voltage cables with improved electrical breakdown strength.

POLYOLEFIN COMPOSITION WITH INCREASED RESISTANCE TO CIO2-CONTAINING WATER

The present invention relates to a polyolefin composition comprising a polyolefin base resin and an antioxidant, characterized in that said polyolefin composition has a lifetime of at least 200 h in a test measuring the resistance against ClO-containing water at 90° C. and at a concentration of ClOof 4 ppm wherein the equipment used is according to ASTM F2263-03. 112-. (canceled)14. The method according claim 13 , wherein the polyolefin composition comprises an ethylene homo- or copolymer base resin.15. The method according to claim 13 , wherein the amount of antioxidant in the polyolefin composition is 5000 ppm or less.16. The method according to claim 15 , wherein the amount of antioxidant in the polyolefin composition is 3500 ppm or less.17. The method according to claim 16 , wherein the amount of antioxidant in the polyolefin composition is 2500 ppm or less.18. The method according to claim 13 , wherein the increased resistance is imparted to a pipe comprised of the polyolefin composition.19. The method according to claim 13 , wherein said polyolefin composition has a lifetime of at least 200 h in a test measuring the resistance against ClO-containing water at 90° C. and at a concentration of ClOof 4 ppm wherein the equipment used is according to ASTM F2263-03.20. The method according to claim 13 , wherein the heteroatom of at least one of substituents R claim 13 , R′ and R″ is a sulphur atom.21. The method according to claim 13 , further comprising forming a pipe from said polyolefin composition and transporting drinking water through the pipe.22. The method according to claim 21 , wherein the drinking water contains ClO. The present invention relates to a polyolefin composition with increased resistance to degradation caused by ClO-containing water and to a pipe made of such a polyolefin composition. The present invention further relates to the use of the polyolefin composition for the production of a pipe and to the use of a specific antioxidant for ...

Polypropylene composition comprising a propylene copolymer component

The present invention concerns a polypropylene composition comprising a nucleated propylene copolymer having improved optical properties.

Process for preparing an olefin polymerisation catalyst component with improved high temperature activity

The invention refers to a process for increasing the polymerization activity of a titanium containing catalyst, in particular an olefin polymerization catalyst component in particulate form having an improved high temperature activity and the use thereof in a process for polymerizing olefins.

EQUIPMENT AND PROCESS FOR PRODUCING POLYMER PELLETS

The present invention relates to an equipment and method for producing polymer pellets which comprise one or more polymer components and one or more further components, wherein in said process at least one of said one or more further components is incorporated into pellets by applying a liquid, which comprises said at least one component, onto said pellets. 144-. (canceled)45. An equipment for producing polymer pellets comprising one or more polymer components and one or more further components , which equipment comprises at least one first mixing apparatus for introducing at least one of said further components onto polymer pellets , which said first mixing apparatus comprises:an inlet for feeding polymer pellets into said first mixing apparatus, to form a pellet stream,a first mixing section provided with mixing means for moving and mixing said pellet stream along said first mixing section,at least one application device, said application device applies said at least one further component(s) onto the polymer pellets at one or more positions selected from prior to said first mixing apparatus, at said inlet of said first mixing apparatus, and within said section of said first mixing apparatus, andan outlet for removing the mixed pellet stream from said first mixing section,wherein said first mixing section is an elongated mixing section having a longitudinal axis and is arranged substantially horizontally within the longitudinal direction of the mixing section to move the said pellet stream along said section from the inlet towards the outlet,said mixing device for moving and mixing said pellet stream in said first mixing section causes said mixing section to at least vibrate and also oscillate and thereby to cause the pellet stream to vibrate and oscillate within said mixing section and said mixing device for moving and mixing said pellet stream in said first mixing section is selected from the group consisting of one or more of a vibration causing apparatus ...

Olefin polymerization process

A process for olefin polymerization in a reaction vessel, said process comprising polymerizing at least one α-olefin in a polymerization stage employing a catalyst feed comprising 1) a first catalyst composition having at least two active catalytic sites capable of producing a first set of polymer components; 2) a second catalyst composition having at least two active catalytic sites capable of giving essentially the same set of polymer components as produced by the catalyst in feed (1) under the same polymerization conditions but these components in a different ratio to those produced by the catalyst composition of feed (1); wherein the amounts of catalyst compositions (1 and 2) fed into the reaction vessel are independently controlled.

Production of supported olefin polymerisation catalysts

A TRANSITION METHOD BETWEEN CATALYSTS IN OLEFIN POLYMERIZATIONS.

UN METODO PARA LA TRANSICION ENTRE DOS CATALIZADORES DIFERENTES EN POLIMERIZACIONES DE OLEFINAS, UN PRIMER CATALIZADOR Y UN SEGUNDO CATALIZADOR, QUE COMPRENDE LOS PASOS DE: DISCONTINUACION DEL LECHO DEL PRIMER CATALIZADOR EN EL REACTOR DE POLIMERIZACION Y LA INTRODUCCION DEL SEGUNDO CATALIZADOR EN EL REACTOR; EN EL QUE LA TRANSICION SE REALIZA ENTRE UN CATALIZADOR BASADO EN CROMO Y UN CATALIZADOR DE METALOCENO. A METHOD FOR THE TRANSITION BETWEEN TWO DIFFERENT CATALYSTS IN OLEFIN POLYMERIZATIONS, A FIRST CATALYST AND A SECOND CATALYZER, THAT INCLUDES THE STEPS OF: DISCONTINUATION OF THE FIRST CATALYST'S MILK IN THE POLYMERIZATION REACTOR AND THE SECONDIZATION CATALYST; IN WHICH THE TRANSITION IS MADE BETWEEN A CHROME-BASED CATALYST AND A METALOCENE CATALYST.

A method of catalyst transitions in olefin polymerizations

METHOD FOR CATALYST TRANSITIONS IN OLEFIN POLYMERIZATIONS

A method of catalyst transitions in olefin polymerisations

A method of catalyst transitions in olefin polymerisations. A method for transitioning between two different catalysts in olefin polymerisations, a first catalyst and a second catalyst, comprising the steps of: a) discontinuing the feed of the first catalyst into the polymerisation reactor, and then b) introducing the second catalyst into the reactor, characterised in that the transitioning is performed between a chromium-based catalyst and a metallocene catalyst in the absence of any agent which deactivates or kills the catalyst.

Process for catalyst transitions in olefin polymerizations

A METHOD OF CATALYST TRANSITIONS IN OLEFIN POLYMERIZATIONS.

Un método para realizar la transición entre dos diferentes catalizadores en polimerizaciones de olefinas, un primer catalizador y un segundo catalizador, que consta de las etapas de: a) interrumpir la alimentación del primer catalizador al reactor de polimerización y luego b) introducir el segundo catalizador en el reactor, caracterizado porque la transición se lleva a cabo entre un catalizador a base de óxido de cromo y un catalizador de metaloceno en ausencia de cualquier tipo de agente que desactive o envenene el catalizador. A method for transitioning between two different catalysts in olefin polymerizations, a first catalyst and a second catalyst, consisting of the steps of: a) interrupting the feeding of the first catalyst to the polymerization reactor and then b) introducing the second catalyst in the reactor, characterized in that the transition takes place between a catalyst based on chromium oxide and a metallocene catalyst in the absence of any type of agent that deactivates or poisons the catalyst.

A method of catalyst transitions in olefin polymerisations

A method of catalyst transitions in olefin polymerisations. A method for transitioning between two different catalysts in olefin polymerisations, a first catalyst and a second catalyst, comprising the steps of: a) discontinuing the feed of the first catalyst into the polymerisation reactor, and then b) introducing the second catalyst into the reactor, characterised in that the transitioning is performed between a chromium-based catalyst and a metallocene catalyst in the absence of any agent which deactivates or kills the catalyst.

METHOD FOR CATALYST TRANSITIONS IN OLEFIN POLYMERIZATIONS

Process for catalyst transitions in olefin polymerizations

A method of catalyst transitions in olefin polymerisations

A method of catalyst transitions in olefin polymerisations. A method for transitioning between two different catalysts in olefin polymerisations, a first catalyst and a second catalyst, comprising the steps of: a) discontinuing the feed of the first catalyst into the polymerisation reactor, and then b) introducing the second catalyst into the reactor, characterised in that the transitioning is performed between a chromium-based catalyst and a metallocene catalyst in the absence of any agent which deactivates or kills the catalyst.

Method and apparatus for producing polymers

Method and apparatus of producing polymers in a gas phase polymerization reactor, which has an elongated reactor body, and an essentially vertically disposed central axis. The reactor comprises an upper part and a lower part, which are separated by a distribution plate, which promotes distribution into the fluidized bed of monomers flowing from the lower part into the upper part. According to the invention, at least a part of the gas stream fed into the lower part of the reactor is conducted along the inside of the reactor walls past the distribution plate to prevent the formation of stagnant zones in the fluidized bed at the reactor walls in the vicinity of the distribution plate.

Polymerization Process

Polymerization process

A process for the polymerization of ethylene and optionally at least one C3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerization being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.

Process control system

The invention relates to a control system, especially one for use in the control of industrial plant such as a polymerisation reactor. In particular, the invention provides a method of controlling a process comprising the steps of: a) generating a first-principle model corresponding to the process; b) inputting data describing the current and desired future process conditions; c) generating a linear approximation to the model which is valid for said current conditions; d) using said linear approximation to determine an approximate solution to a control problem related to the process; and e) controlling the process using said approximate solution.

olefin polymerization

Polymerization Process

A process for the polymerisation of ethylene and optionally at least one C 3-20 alpha olefin comonomer in the slurry or solution phase in a reactor having a polymer outlet stream, a procatalyst or catalyst feed stream and a hydrogen feed stream, said polymerisation being effected in the presence of a metallocene catalyst, a diluent and hydrogen, wherein said diluent is recycled from said outlet stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said procatalyst or catalyst feed stream does not comprise recycled diluent.

Olefin polymerisation catalyst and methods for preparing the same

Method and Apparatus for Producing Polymers

Method and apparatus of producing polymers in a gas phase polymerization reactor, which has an elongated reactor body, and an essentially vertically disposed central axis. The reactor comprises an upper part and a lower part, which are separated by a distribution plate, which promotes distribution into the fluidized bed of monomers flowing from the lower part into the upper part. According to the invention, at least a part of the gas stream fed into the lower part of the reactor is conducted along the inside of the reactor walls past the distribution plate to prevent the formation of stagnant zones in the fluidized bed at the reactor walls in the vicinity of the distribution plate.

Method and apparatus for producing polymers

Method and apparatus of producing polymers in a gas phase polymerization reactor, which has an elongated reactor body, and an essentially vertically disposed central axis. The reactor comprises an upper part and a lower part, which are separated by a distribution plate, which promotes distribution into the fluidized bed of monomers flowing from the lower part into the upper part. According to the invention, at least a part of the gas stream fed into the lower part of the reactor is conducted along the inside of the reactor walls past the distribution plate to prevent the formation of stagnant zones in the fluidized bed at the reactor walls in the vicinity of the distribution plate.

Method for eliminating static electricity

The invention concerns a method for eliminating static electricity formed when polymer powder is conveyed as a flow through a pipeline system. According to the invention, antistatic chemical is added into the flow. The antistatic chemical especially improves the flow properties of the powder.

Method for producing alpha-olefin polymer resin

Olefin polymerisation process

A process for olefin polymerisation in a reaction vessel, said process comprising polymerising at least one α-olefin in a polymerisation stage employing a catalyst feed comprising 1) a first catalyst composition having at least two active catalytic sites capable of producing a first set of polymer components; 2) a second catalyst composition having at least two active catalytic sites capable of giving essentially the same set of polymer components as produced by the catalyst in feed (1) under the same polymerisation conditions but these components in a different ratio to those produced by the catalyst composition of feed (1); wherein the amounts of catalyst compositions (1 and 2) fed into the reaction vessel are independently controlled.

POLYMERIZATION PROCEDURE.

Un procedimiento para la polimerización de etileno y opcionalmente al menos un comonómero de alfa-olefina C3.20 en la fase de suspensión o disolución en un reactor con una corriente de salida de polímero, una corriente de alimentación de procatalizador o catalizador y una corriente de alimentación de hidrógeno, efectuándose dicha polimerización en presencia de un catalizador de metaloceno, un diluyente e hidrógeno, dicho diluyente se recicla de dicha corriente de salida a dicha corriente de alimentación de hidrógeno, dicha corriente de alimentación de procatalizador o catalizador está exenta de hidrógeno, dicha corriente de alimentación de hidrógeno está exenta de procatalizador o catalizador y dicha corriente de alimentación de procatalizador o catalizador no comprende diluyente reciclado. A process for the polymerization of ethylene and optionally at least one C3.20 alpha-olefin comonomer in the suspension or dissolution phase in a reactor with a polymer output stream, a procatalyst or catalyst feed stream and a stream of hydrogen feed, said polymerization being carried out in the presence of a metallocene catalyst, a diluent and hydrogen, said diluent is recycled from said output stream to said hydrogen feed stream, said procatalyst or catalyst feed stream is free of hydrogen, said hydrogen feed stream is free of procatalyst or catalyst and said feed stream of procatalyst or catalyst does not comprise recycled diluent.

Alpha-olefin homo-or copolymer compositions

The invention is directed an alpha-olefin homo- or copolymer composition comprising at least one (i) alpha-olefin homo- or copolymer component, wherein the alpha-olefin homo- or copolymer composition comprises a decreased amount of C6-C15-oligomers.

Liquid container

SUBSTITUTED METALOCE COMPOUNDS FOR OLEFIN POLYMERIZATION CATALYST SYSTEMS, THEIR INTERMEDIATE COMPOUNDS AND METHOD FOR THE PRODUCTION THEREOF

OLEFIN POLYMERIZATION PROCEDURE

Olefin polymerisation process

Olefin polymerisation process

A process for olefin polymerization in a reaction vessel, said process comprising polymerizing at least one alpha-olefin in a polymerization stage employing a catalyst feed comprising 1) a first catalyst composition having at least two active catalytic sites capable of producing a first set of polymer components; 2) a second catalyst composition having at least two active catalytic sites capable of giving essentially the same set of polymer components as produced by the catalyst in feed (1) under the same polymerization conditions but these components in a different ratio to those produced by the catalyst composition of feed (1); wherein the amounts of catalyst compositions (1 and 2) fed into the reaction vessel are independently controlled.

Catalyst for the (co)polymerization of ethylene and a method for the preparation thereof

A particulate, modified chromium oxide catalyst for the polymerisation of ethylene or ethylene with α-olefins, comprising: a) a chromium-oxide catalyst, b) a transition metal compound, and c) a catalyst activator. A method for the preparation of the catalyst comprises the steps of: a) subjecting a chromium oxide catalyst precursor, which comprises a chromium oxide compound combined with an inorganic support, to a temperature in the range of from 400 to 950° C. under oxidising conditions, and b) impregnating the obtained chromium catalyst with a catalyst activator and with a transition metal compound which comprises at least one cyclopentadienylic ring bonded to said transition metal and at least ligand selected from the group comprising alkoxy, amido and hydrocarbyl radicals, halogen and hybride bonded to said transition metal, which cyclopentadienylic ring may contain hetero atoms, be unsubstituted or substituted, be bonded to said transition metal through a bridge, and optionally annealed to other substituted or unsubstituted ring structures, and if two cyclopentadienyl rings are present they may be bonded to each other through a bridge, and c) subjecting the thus obtained particulate catalyst to drying conditions. This catalyst is suitable for producing polyethylenes under conditions of continuous feeding of all reactants.

Catalyst

olefin polymerization

Olefin polymerisation process

A process for olefin polymerisation in a reaction vessel, said process comprising polymerising at least one α-olefin in a polymerisation stage employing a catalyst feed comprising 1) a first catalyst composition having at least two active catalytic sites capable of producing a first set of polymer components; 2) a second catalyst composition having at least two active catalytic sites capable of giving essentially the same set of polymer components as produced by the catalyst in feed (1) under the same polymerisation conditions but these components in a different ratio to those produced by the catalyst composition of feed (1); wherein the amounts of catalyst compositions (1 and 2) fed into the reaction vessel are independently controlled.

Multistep process for preparing polyolefins having high melt strength

Olefin polymers are prepared in a plurality of polymerization stages, optionally in a plurality of polymerization reactors, in the presence of hydrogen and an olefin polymerization multisite catalyst, preferably a dualsite catalyst, having at least catalytic sites A and B, site A capable of yielding polymers of different molecular weights and differing MFR 2 or MFR 21 depending on the concentration of hydrogen in the polymerization reactor and site B capable of yielding polymers of certain molecular weight and MFR 2 or MFR 21 depending on the concentration of hydrogen in the polymerization reactor where the ratio between MFR 2 or MFR 21 of polymers produced by site B at two different selected hydrogen concentrations is less than ten and the ratio between MFR 2 or MFR 21 of polymers produced by site A at the same hydrogen concentrations is more than 50.

Improvements in or relating to polymers

Olefin homopolymers and copolymers, including novel products with essentially complete particle to particle homogeneity and having polymer chain defects introduced in a controlled manner across their molecular weight distribution, are prepared by a process comprising polymerisation under essentially constant conditions in a single reactor in the presence of a catalyst system comprising a support material coimpregnated with at least two metallocene olefin polymerisation catalysts having different propensities for incorporation of polymer chain defects.

Olefin polymerization process

This invention relates to a process for the preparation of olefin polymers, preferably a multi-stage process, in which hydrogen is used to control the molecular weight of the olefin polymer produced in a continuous reactor, in particular a process wherein a metallocene or other single site catalyst is present in the polymerization reaction mixture, as well as to olefin polymers produced thereby.

Olefin polymerisation process

Multi-stage process for producing polyethene

The invention relates to a multi-stage process for producing ethene homo or copolymer, which multi-stage process comprises, in any order, at least a liquid-phase polymerisation step (a) and a gas-phase polymerisation step (b). The process is characterised in that the polymerisation is carried out in the presence of a chromium catalyst. According to an embodiment of the invention, the molar masses and/or melt flow rates of the ethene homo or copolymers produced in steps (a) and (b) are essentially identical.

Production of supported olefin polymerisation catalysts

The invention provides a process for producing an olefin polymerisation catalyst, comprising suspending a porous particulate support material in a liquid/liquid two phase system which comprises a solution of one or more catalyst components and an inert solvent immiscible therewith, to impregnate said solution into the pores of said support material, and optionally    solidifying said impregnated solution present in the pores of said support particles.

Catalyst system and process for olefin polymerisation

A catalyst system for olefin polymerisations comprising (i) a particulate solid support impregnated with a magnesium halogenide and a chromium compound having at least one organic ligand; and (ii) a cocatalyst selected from an alkyl aluminium or alkyl aluminium halogenide or mixtures thereof; wherein the support is not calcined after impregnation of said chromium catalyst; and wherein the molar ratio between the total amount of aluminium and the total amount of chromium is form 1:1 to 50:1.

Process for the catalytic polymerization of olefins, a reactor system, its use in the process, the polyolefins obtained and their use

The present invention relates to a process for the catalytic polymerization of olefins comprising the steps of; i) a first polymerization in a first reactor, wherein olefins are polymerized with a particulate catalyst, hydrogen and optional a comonomer in a fluidum of an inert low boiling hydrocarbon medium into an reaction mixture comprising polymerized olefins; and ii) a second polymerization in a second reactor, wherein the polymerized olefins are further polymerized in a fluidized bed and in a moving bed under such conditions that the residence time in the fluidized bed and the residence time in the moving bed are independently controlled to a reactor system for carrying out said process, to the use of the reactor system, the polyolefins obtainable with said method and to the use of these polyolefins.

Process for producing polyethylene

Process and apparatus for continuously producing olefin polymers in a slurry phase reactor in a hydrocarbon diluent or liquid monomer. The process comprises continuously withdrawing from the slurry phase reactor a polymer slurry containing polymer and a fluid phase, which contains hydrocarbons and optionally hydrogen, and concentrating the slurry with a self-cleaning screen by removing a part of the fluid phase to provide a concentrated slurry. The openings of the screen, which can have a planar or cylindrical configuration, are smallest at the inflow surface of the screen and increases towards the outflow surface. By the present invention, the need for service and maintenance is significantly reduced.

Verfahren zur Herstellung von Propylen Polymeren und schlagzäh modifizierten Polymeren

METHOD AND DEVICE FOR DISCHARGING A POLYMERIZATION REACTOR

Film

A film, e.g. a monolayer film or multilayer, or a polymer composition comprising at least one single site produced LLDPE (mLLDPE) and an ethylene acrylate copolymer.

Polymer

A high density polyethylene homopolymer or copolymer with at least one C 3-20 alpha olefin, wherein said polymer has an MFR 2 of 0.05 to 10 g/10min, a density of at least 940 kg/m 3 and a strain at break in the transverse direction of at least 650% and when said polymer is formulated as a film having a thickness of 30 microns, it has a WVTR of less than 4.5 g/m 2 /24 hours according to ASTM F 1249 at 38°C and 90% humidity.

Extrusion coating

Multimodal polyethylene composition for injection moulded transport packaging articles

Multimodal polyethylene composition obtainable with high activity catalyst

The present invention concerns a multimodal, preferably bimodal, polyethylene (PE) composition comprising a base resin which comprises (A) a first ethylene homo- or copolymer fraction, and (B) a second ethylene homo- or copolymer fraction, wherein (i) fraction (A) has a lower weight average molecular weight than fraction (B), (ii) the base resin has an MFR 5 of at least 0.01 g/10 min and (iii) the base resin is obtainable by polymerising ethylene and optionally at least one comonomer in the presence of a catalyst having an overall activity of at least 30 kg polymer per g catalyst. Furthermore, the present invention relates to a process for the production of such a composition as well as to the use of such a composition for the production of articles.

Polymer composition, a process for the production thereof and films prepared thereof

Metallocene catalysts containing an idenyl moiety substituted at the 4,-5,-6- or 7-position by a siloxy or germyloxy group

A metallocene catalyst in which the metal is coordinated by a η 5 cyclopentadienyl ligand which forms part of an indenyl or indenyloid moiety, characterised in that said moiety is directly or indirectly substituted at the 4-, 5-, 6- or 7-position by a pendant siloxy or germyloxy group.

Metallocene catalysts containing an indenyl moiety substituted at the 4-, 5-, 6- or 7-position by a siloxy or germyloxy group

A metallocene catalyst in which the metal is coordinated by a θ5 cyclopentadienyl ligand which forms part of an indenyl or indenyloid moiety, characterised in that said moiety is directly or indirectly substituted at the 4-, 5-, 6- or 7-position by a pendant siloxy or germyloxy group.

Polypropylene film with improved balance of mechanical properties

The present invention relates to a blown film made of a composition comprising a) a propylene heterophasic copolymer (A) with a matrix propylene polymer and an ethylene-propylene-rubber characterized in that the film has been monoaxially oriented in the machine direction with a stretch ratio of 1:1.1 to 1:10, to a process for making such a film, to the use of said composition in making such a film, and to an article comprising such a film.

Multimodal polypropylene polymer composition

A multimodal polymer composition comprising: (A) a polypropylene homopolymer or a propylene random copolymer comprising propylene and up to 5 weight % of comonomer selected from ethylene and/or C 4-10 alpha olefin; and (B) a random copolymer of propylene and comonomer selected from ethylene and/or C 4-10 alpha olefin; wherein the total comonomer content of the polymer composition is at least 0.5 wt% and the melt flow rate of the polymer blend is at least 6 g/10 min when measured according to ISO 1133 at 230°C and a load of 2.16 kg.

Multilayer structures

Flat film for thermoforming

The invention relates to a flat film for thermoforming with high toughness, high stiffness and high transparency, comprising a polyolefin composition, which polyolefin composition comprises: A) a heterophasic propylene copolymer containing a) 75 - 95 wt% of a matrix phase comprising a propylene homopolymer or a propylene copolymer with up to 5 mol% of ethylene and/or at least one C4-C8 α-olefin and b) 5 - 25 wt% of a disperse phase comprising an ethylene rubber copolymer with from 20 - 80 mol% ethylene and from 80 - 20 mol% of at least one C3-C8 α-olefin and where the intrinsic viscosity of the XCS-fraction of the heterophasic copolymer is ≤ 2 dl/g and B) an α-nucleating agent and a process for their preparation and their use.

Sterilisable and tough impact polypropylene composition

The present invention relates to a heterophasic polypropylene composition which is sterilisable and has a high impact strength as well as improved optical properties both before and after a step of heat sterilisation. Furthermore, the present invention relates to a film comprising said heterophasic polypropylene composition, and to the use of said composition for the production of a film. Finally, the present invention is directed to the use of such a film as a packaging material for medicals and/or food. The heterophasic polypropylene composition comprises a matrix resin which comprises (A) a propylene homopolymer and (B) a propylene random copolymer; and a dispersed phase which comprises (C) an ethylene-propylene rubber wherein (i) the melting point of the heterophasic polypropylene composition is at least 145° C. and (ii) the content of comonomer in the matrix resin is at least 0.5 wt % based on the entire matrix resin without any additives.

Polypropylene compositions

The present invention relates to polypropylene compositions with improved processability and to a method for the manufacture of said compositions. Said compositions are particularly suitable for extrusion coating processes. The polypropylene composition comprises from 50 to 90 wt% of polypropylene selected from propylene homopolymer, random copolymer and block copolymer, from 5 to 25 wt% of high-pressure low-density polyethylene and from 5 to 40 wt% of unimodal and/or bimodal and/or multimodal high-density polyethylene.

Multilayer films

The invention relates to a multilayer film, where at least one exterior layer comprises 90-99.9 wt% of a polypropylene composition, which is comprised of a propylene random copolymer and 0.1 - 10.0 wt% of a propylene homopolymer having an MFR > 100 g/10 min (230°C, 2.16 kg).

HIGH DENSITY POLYETHYLENE COMPOSITIONS, A METHOD FOR THE PRODUCTION THEREOF, AND FILMS MANUFACTURED THEREFROM

Process for polymerising olefins in the presence of an olefin polymerisation catalyst

Catalyst component comprising magnesium, titanium, a halogen and an electron donor, its preparation and use

The invention relates to a new process for the preparation of an olefin polymerization catalyst component, as well as a new polymerization catalyst component and its use. In the process, a magnesium dialkyl or diahlide or alkyl alkoxide is reacted with an alcohol and the reaction product is reacted with an unsaturated dicarboxylic acid dihalide and a titanium tetrahalide. Especially good catalyst activity and morphology are achieved by using a polyhydric alcohol such as ethylene glycol.

Process

Use of talc as a nucleating agent for linear low density polyethylene, said polyethylene having a density below 940 g/cm 3 .

Movie

Película de múltiples capas que comprende al menos tres capas, dos capas exteriores y una capa central, comprendiendo independientemente cada capa exterior un LLDPE y un componente de LDPE y comprendiendo dicha capa central un componente de polietileno multimodal que tiene un componente de menor peso molecular y un componente de mayor peso molecular, teniendo dicho polietileno multimodal una densidad de 915 a 940 kg/m3 en el que la densidad del componente de mayor peso molecular es menos de 915 kg/m3 y el MFR2 (medido de acuerdo con la norma ISO 1133 a 190 ºC con una carga de 2,16 kg) del componente de mayor peso molecular es menos de 1 g/10 min. Multilayer film comprising at least three layers, two outer layers and a central layer, each outer layer independently comprising an LLDPE and an LDPE component and said central layer comprising a multimodal polyethylene component having a lower molecular weight component and a component of greater molecular weight, said multimodal polyethylene having a density of 915 to 940 kg / m3 in which the density of the component of greater molecular weight is less than 915 kg / m3 and the MFR2 (measured in accordance with ISO 1133 at 190 ° C with a load of 2.16 kg) of the component with the highest molecular weight is less than 1 g / 10 min.

Multimodal polyethylene composition for injection moulded caps and closure articles

Multimodal medium density polyethylene polymer composition

A multimodal medium density polyethylene polymer obtainable using single site catalysis which comprises at least: (A) a lower molecular weight (LMW) polyethylene homopolymer component; and (B) a higher molecular weight (HMW) polyethylene copolymer component which is a copolymer of ethylene and at least one C3-12-alpha olefin; wherein said multimodal medium density polyethylene polymer has a density of 925 to 945 kg/m 3 and a comonomer content of less than 2.5 mol%.

聚丙烯组合物的应用

本发明涉及滚塑用聚合物组合物的应用，其中所述组合物包括：(i)至少两种丙烯聚合物组分，(ii)成核剂和(iii)抗冲改性剂。

Surface-modified polymerization catalysts for the preparation of low-gel polyolefin films

Use of a catalyst composition treated with a surface modifier in the polymerization of olefins for lowering the gel content in the resulting polyolefin, wherein the surface modifier has a polar residue capable of interacting with the surface of the catalyst composition and a lipophilic residue and is selected from carboxylate metal salts, nitrogen containing catalyst surface modifiers, phosphorus containing catalyst surface modifiers, oxygen containing catalyst surface modifiers, sulfur containing catalyst surface modifiers, fluoro containing polymeric catalyst surface modifiers or mixtures thereof and wherein the gel content is determined by using pressed plate gel analysis method.

Olefin polymerisation process

The invention relates to a process for the preparation of a multimodal A-olefin polymer comprising polymerising in a polymerisation stage at least one A-olefin in the presence of a multisite catalyst and an adjuvant so as to produce a polymer having a relatively lower molecular weight component and a relatively higher molecular weight component, said adjuvant being selected from the group consisting of phosphines, phosphites, acetylenes, dienes, thiophenes and aluminium alkyls and said adjuvant being capable of altering the ratio of the fraction of higher molecular weight component to the fraction of the lower molecular weight component by at least 10%.

Multi-branched polypropylene

Multi-branched polypropylene having a g′ of less than 1.00

Olefin polymerization process

The invention relates to a process for the preparation of a multimodal A-olefin polymer comprising polymerizing in a polymerization stage at least one A-olefin in the presence of a multisite catalyst and an adjuvant so as to produce a polymer having a relatively lower molecular weight component and a relatively higher molecular weight component, said adjuvant being selected from the group consisting of phosphines, phosphites, acetylenes, dienes, thiophenes and aluminium alkyls and said adjuvant being capable of altering the ratio of the fraction of higher molecular weight component to the fraction of the lower molecular weight component by at least 10%.

Multi-branched polypropylene

Multi-branched polypropylene having a g′ of less than 1.00.

Process for preparing polypropylene alloys

Described herein is a process and an apparatus for polymerizing propylene. The process comprises carrying out the polymerization in at least one slurry reactor and at least one gas phase reactor without recycling unreacted monomers to the slurry reactor. A polymerization product containing unreacted monomers is recovered from the slurry reactor and volatile components are separated from the product in a separation unit. The polymerization product is recovered from the separation unit and conducted to a first gas phase reactor; and at least a part of the volatile components a recovered from the separation unit and conducted them to a gas phase reactor. At least 10% of the polymer product is produced in the gas phase reactor(s). The invention provides propylene homopolymers and alloys of propylene homopolymers and copolymers having good impact and creep properties.

Method and apparatus for discharging polymerization reactors

A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention comprises continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.

Process for polymerizing olefins in the presence of an olefin polymerization catalyst

The present invention relates to a process for the preparation of multimodal ethylene homo- or copolymers in at least two stages, the process comprising preparation of a first ethylene homo- or copolymer fraction in a loop reactor in slurry phase, preparation of a second ethylene homo- or copolymer fraction in a gas phase reactor, by using a catalyst not containing an inorganic oxide support, and operating the gas phase reactor in such conditions that at least part of the gas is recycled, and that at least a part of the recycled gas is condensed and the (partially) condensed gas is re-introduced into the gas phase reactor.

Reactor system for the catalytic polymerization of olefins comprising shielding means and a process and use thereof

The invention relates to a reactor system for the catalytic polymerization of olefin monomer and optionally comonomer(s), comprising one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerization particles, which reactor system comprises at least one fluidized bed unit and at least one a moving bed unit, wherein the fluidized bed unit comprises means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are connected to the fluidized bed unit, wherein in the fluidized bed unit is positioned shielding means such that via the outlet of the moving bed unit inflow of fluidization gas is inhibited and outflow of polymerization particles allowed and to a process and use thereof.

Reactor system and process for the catalytic polymerization of olefins, and the use of such reactor system in catalytic polymerization of olefins

The invention relates to a reactor system and process for the catalytic polymerization of olefin monomer and optionally comonomer(s), comprising one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles, which reactor system comprises at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit comprises means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for displacing metered quantities of polymerized particles from the moving bed unit into the fluidized bed unit, and to the use of such reactor system.

Reactor systems and process for the catalytic polymerization of olefins, and the use of such reactor system in catalytic polymeration of olefins

The invention relates to a reactor system for the catalytic polymerization of olefin monomer and optionally comonomer(s), comprising one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles, which reactor system comprises at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit comprises means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are directly connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for pneumatically displacing polymer particles from the moving bed unit into the fluidized bed unit.

Method and apparatus for discharging polymerization reactors

A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention includes continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.

Method and apparatus for discharging polymerization reactors

A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention comprises continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.

Method and apparatus for discharging polymerization reactors

A method and an apparatus of discharging polymer from a continuously operated gas phase reactor, wherein at least one monomer is polymerized in a bed containing active catalyst formed by catalyst and polymer particles suspended in a fluid, the bed defining a fluidized bed level in said reactor. The invention includes continuously withdrawing polymer powder from the reactor; and adjusting the discharge rate of the polymer powder so as to maintain a constant bed level during polymerization. By means of the invention the discharge of the polymer can be made truly continuous without any disturbance of the polymerization. The rate of withdrawn polymer can be flexibly adjusted depending on the progress of the polymerization and it can also easily be scaled up if the capacity of the reactor is increased.

Process for polymerizing olefins in the presence of an olefin polymerization catalyst

The present invention relates to a process for the preparation of multimodal ethylene homo- or copolymers in at least two stages, the process comprising preparation of a first ethylene homo- or copolymer fraction in a loop reactor in slurry phase, preparation of a second ethylene homo- or copolymer fraction in a gas phase reactor, by using a catalyst not containing an inorganic oxide support, and operating the gas phase reactor in such conditions that at least part of the gas is recycled, and that at least a part of the recycled gas is condensed and the (partially) condensed gas is re-introduced into the gas phase reactor.

Reactor system and process for the catalytic polymerization of olefins, and the use of such reactor system in catalytic polymerization of olefins

The invention relates to a reactor system and process for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for displacing metered quantities of polymerized particles from the moving bed unit into the fluidized bed unit, and to the use of such reactor system.

Reactor System and Process for the Catalytic Polymerization of Olefins, and the Use of Such Reactor System in Catalytic Polymerization of Olefins

The invention relates to a reactor system for the catalytic polymerization of olefin monomer and optionally comonomer(s), having one or more inlets for olefin monomer, catalyst, optionally for comonomer, chain growth controllers or chain transfer agents, and/or inert gas, an outlet for gas and an outlet for polymerized particles. The reactor system has at least one fluidized bed unit and at least one moving bed unit, wherein the fluidized bed unit has means for maintaining a fluidized bed in the fluidized bed unit and wherein the moving bed unit is provided with an inlet and an outlet which are directly connected to the fluidized bed unit, wherein the outlet of the moving bed unit is provided with means for pneumatically displacing polymer particles from the moving bed unit into the fluidized bed unit.