Abstract: The present invention relates to a multimodal 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)??10.58 log MFR2 [g/10 min]/(g/10 min)+12.94, and (iii) the composition has an environmental stress crack resistance ESCR of 10 h or more. Furthermore, the present invention relates to a process for the production of said composition, an injection moulded article, in particular a cap or closure, comprising said composition and to the use of said composition for the production of an injection moulded article.

Abstract: Catalyst system comprising a. a procatalyst composition comprising a transition metal compound, a metal compound and an internal donor, and b. an external donor being an diethoxy-substituted silane, wherein c. said internal donor being chemically different to said external donor.

Abstract: The present invention relates to a composition, in particular to a polypropylene composition, and articles thereof, having an optimal balance between mechanical properties and transparency and thus the composition is particular suitable for packaging applications.

Abstract: The present invention relates to a process for the production of propylene copolymers wherein in a first step an olefin polymerization catalyst comprising a solid catalyst component is subjected to a prepolymerization reaction in a prepolymerization reactor, in which propylene monomers are present in an amount of 98.0 to 99.9 mol % and further alpha-olefin monomers other than propylene are present in an amount of 0.1 to 2.0 mol %, based on the combined amount of propylene and further alpha-olefin monomers, so that a prepolymer is produced on the catalyst in an amount of 10 to 1000 g per g of the solid catalyst component, and in a second, subsequent step propylene and further alpha-olefin monomers other than propylene are copolymerized in the presence of the prepolymerized catalyst produced in the first step so that a propylene copolymer is obtained which contains at least 0.

Abstract: The present invention relates to a crosslinkable high pressure polyethylene composition containing ethylene silane copolymer resin having a content of silane of about 0.1 to 10 weight % and at least one silanol condensation catalyst. The invention further relates to a process for the preparation thereof, to a pipe made of said composition and to the use of the composition as an insulation for a cable.

Abstract: The invention relates to propylene polymer compositions comprising 50-70 wt % of a propylene homo- or copolymer, 5-20 wt % of a first elastomeric ethylene-propylene copolymer, 5-25 wt % of a second elastomeric ethylene-propylene copolymer and 5-30 wt % of an ethylene polymer. The propylene polymer compositions are suitable for moulding and they have low haze and a good impact strength/stiffness balance with good impact strengths at low temperatures.

Abstract: A forming process of plastic parts is simulated. The position and time of plastics particles which exceed at least one defined critical limit are detected. The final positions of particles in the surface layer of the plastics part are computed. The positions of the particles in the surface layer are defined as positions with deviations in the surface appearance.

Abstract: The present invention relates to a Ziegler-Natta catalyst comprising a solid, ligand-modified catalyst component formed at least from (a) a compound of Group 1 to 3 of the Periodic Table (IUPAC), (b) a transition metal compound of Group 4 to 10 of the Periodic Table (IUPAC), or a compound of an actinide or lanthanide, (c) one or more organic ligand compound(s) which is/are selected from organic compounds comprising a cyclopentadienyl anion backbone, and (d) a compound of Group 13 of the Periodic Table, wherein the catalyst component of said Ziegler-Natta catalyst is formed in an emulsion/solidification method, to a process for the production of such a catalyst, and to a process for the production of an olefin (co-)polymer in the presence of such a catalyst.

Abstract: The invention relates to propylene polymer blends comprising 70-92 wt % of a propylene homopolymer, 5-15 wt % of an elastomeric ethylene-propylene copolymer, 3-15 wt % of a linear low density polyethylene and an a-nucleating agent. The propylene polymer blends have an excellent impact strength/stiffness balance and optical properties. They are especially suitable for thermoforming and extrusion blow moulding.

Abstract: The present invention is directed to a first polypropylene composition comprising a propylene copolymer as matrix phase (A) comprising a homo/random/block copolymer consisting of a) a propylene homopolymer (A1); b) a propylene random copolymer (A2); and c) an ethylene-propylene rubber (EPR) (A3) and a polyolefin (B) dispersed in the matrix phase (A), which comprises hydrolysable silicon-containing groups. The present invention is furthermore directed to a second polypropylene composition comprising a matrix phase (A) comprising a propylene homo- or copolymer with an impact strength at +23° C. of at least 40.0 kJ/m2 in a Charpy notched test according to ISO 179-1eA:2000 and a polyolefin (B) dispersed in the matrix phase (A), which comprises hydrolysable silicon-containing groups. The invention is furthermore directed to a production process for the polypropylene compositions and an article made thereof.

Abstract: 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.

Abstract: Industrial polyolefin piping system with improved stiffness, impact strength for use at high service temperature, comprising single or multilayer pipes, fitting, chambers, valves and vessels, consisting of ?-nucleated propylene homopolymers with an IR??0.98 having a tensile modulus ?1500 MPa, a Charpy impact strength, notched, at +23° C.?30 kJ/m2 and a Vicat B temperature >90° C. and a Heat Distortion Temperature >100° C. The industrial polyolefin piping system is suitable for chemical plant constructions comprising single or multilayer pipes, fittings, chambers, valves and vessels with improved stiffness, impact strength and high service temperature, preferred for conveyance of natural gas, dangerous liquids and/or toxic liquids.

Abstract: The present invention provides a cap or closure comprising a polypropylene composition, wherein said composition comprises: (i) a random propylene ethylene copolymer having an ethylene content of 3.3-7% wt, and (ii) an additive selected from an antistatic agent, an antioxidant, an acid scavenger and a nucleating agent.

Abstract: The present invention relates to a process for the preparation of polypropylene using a catalyst system of low porosity, the catalyst system comprising an asymmetric catalyst, wherein the catalyst system has a porosity of less than 1.40 ml/g.

Abstract: Single- or multilayer propylene polymer pipes and pipe components for pipelines with improved resistance to rapid crack propagation made from a propylene homopolymer with a melt index of 0.05 to 10 g/10 min at 230° C./2.16 kg or propylene block copolymer from 90.0 to 99.9 wt % of propylene and 0.1 to 10.0 wt % of a ?-olefins with 2 or 4 to 18 carbon atoms with a melt index of 0.05 to 8 g/10 min at 230° C./2.16 kg or mixtures thereof, wherein the propylene homopolymers or propylene block copolymers are ?-nucleated propylene polymers, and the propylene polymer pipes for pipelines made from the ?-nucleated propylene homopolymers have a rapid crack propagation characterized by a critical temperature of ?5 to +40° C. and a critical pressure?3 bar below the critical temperature and the propylene polymer pipes made from ?-nucleated propylene block copolymers have a rapid crack propagation characterized by a critical temperature of ?25 to 0° C. and a critical pressure?3 bar below the critical temperature.

Abstract: 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 4 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/m to 955 kg/m3.

Abstract: A pressureless polymer pipe, a composition therefore, and a process of preparing the composition are described. The pipe is characterised in that the polymer comprises a propylene polymer composition where the propylene base polymer is a heterophasic propylene copolymer having a matrix of a propylene homopolymer and a dispersed phase of an elastomeric copolymer of propylene and at least one olefin comonomer; has a comonomer content of 2-7% by weight, based on the weight of the heterophasic propylene copolymer; has a melt flow rate MFR (2/230), determined according to ISO 1133 C4, of 0.1-2.0 g/10 min; has a broad molecular weight distribution as defined by its rheology shear thinning index, SHI0/50, measured at 200° C. of 9-30; has a tensile modulus, determined according to ISO 527-2/1B at 1 mm/min and 23° C. of at least 1800 MPa; has an impact strength, determined according to ISO 179/1 eA of at least 6 kJ/m2 at 0° C. and at least 2 kJ/m2 at ?20° C. The composition is a polymer composition as defined above.

Abstract: The present invention relates to a polyethylene composition wherein (i) the composition has an MFR2 of 0.05 to 100 g/10 min, (ii) the environmental stress crack resistance ESCR measured in hours according to ASTM 1693, condition B and E-modulus EM measured according to ISO 527-2: 1993 in MPa satisfy the following relation: ESCR>?EM h/MPa+1150 h.

Abstract: 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.

Abstract: A polymer composition having (i) 0.01 to 50% wt (e.g. 0.05 to 15% wt) of a propylene polymer with a polymeric nucleating agent is disclosed. Preferably, the agent contains vinyl compound units and (ii) a heterophasic propylene polymer which includes less (or no) polymeric nucleating agent than the propylene polymer in (i).