Abstract: 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.

Abstract: 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.

Abstract: The invention relates to a device and a method for impregnating filaments, wherein the filaments form a roving. The device comprises a barrel (10) having at least one groove (12) formed in circumferential direction of the barrel, an inner space formed along the centre axis of the barrel, and at least one recess (16) which forms a connection between the inner space and the groove. The recess includes a cylindrical section (16a), a conical section (16b) and a pocket section (16c). By means of said device and according to the method, a polymer material can be pressed successively from the inner space through at least the cylindrical section and the conical section into the groove to impregnate the filaments of the roving which is drawn through the groove.

Abstract: The present invention relates to a polypropylene composition comprising: a matrix phase comprising a polypropylene homo- or copolymer (A); and a phase dispersed in said matrix phase comprising an olefin homo- or copolymer (B) having hydrolysable silicon-containing groups, and an inorganic filler material (C) containing on its surface silanol groups or precursors thereof, and having a specific surface BET of 30 to 300 m2/g, determined according to ISO 9277:1995, to an article comprising such a composition, and to the use of such a composition for the production of an article.

Abstract: A process for the preparation of a propylene random copolymer, wherein propylene is polymerised with ethylene and/or a C4-C20 alpha-olefin in the presence of a catalyst system comprising solid catalyst particles, wherein the solid catalyst particles (a) have a specific surface area of less than 20 m2/g, (b) comprise a transition metal compound which is selected from one of the groups 4 to 10 of the periodic table or a compound of actinide or lanthanide, 10 (c) comprise a metal compound which is selected from one of the groups 1 to 3 of the periodic table, and (d) comprise inclusions not having catalytically active sites.

Abstract: The present invention relates to a polyolefin composition comprising (a) a polyolefin (A), (b) a vitamin E-type stabiliser (B) according to formula (I), wherein R1, R2, R3, R4 and R5 independently are H, or non-substituted or substituted aliphatic or aromatic hydrocarbyl radicals which may comprise heteroatoms, and (c) a phenolic stabilizer (C) according to formula (II), wherein R6, R7 and R8 independently are non-substituted or substituted aliphatic or aromatic hydrocarbyl radicals which may comprise OH-groups; and X1, X2, and X3 independently are H or OH, with the provisio that at least one of X1, X2 and X3 is OH, and (d) optionally, an UV stabilizer, to an article comprising such a polyolefin composition and to the use of such a composition for the production of an article.

Abstract: 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.

Abstract: The invention relates to a polymer blend suitable for the production of film, said polymer blend comprising at least (1) a multimodal high density polyethylene (HDPE) composition and (2) a low density polyethylene (LDPE) polymer, a linear low density polyethylene (LLDPE) polymer or a mixture of LDPE and LLDPE polymers, said HDPE composition comprising a multimodal HDPE polymer which contains at least a lower molecular weight (LMW) polyethylene component and a higher molecular weight (HMW) polyethylene component.

Abstract: 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.

Abstract: Heterophasic propylene copolymer (HECO) comprising wherein the heterophasic propylene copolymer (HECO) is ?-nucleated and the elastomeric phase has an intrinsic viscosity measured in tetraline at 135° C. of equal or below 4.0 dl/g.

Abstract: The invention relates to a novel process for producing coloured polypropylene compositions having a high content of ?-modification, wherein polypropylene is melt blended with at least one inorganic pigment and at least one ?-nucleating agent, wherein a1) polypropylene is melt blended with at least one inorganic pigment or with a first concentrate comprising the at least one inorganic pigment to obtain a coloured polypropylene and a2) the coloured polypropylene is melt blended with at least one ?-nucleating agent or with a second concentrate comprising the at least one ?-nucleating agent to obtain the coloured ?-nucleated polypropylene composition or b1) polypropylene is melt blended with at least one ?-nucleating agent or with a second concentrate comprising the at least one ?-nucleating agent to obtain a ?-nucleated polypropylene and b2) the ?-nucleated polypropylene is melt blended with at least one inorganic pigment or with a first concentrate comprising the at least one inorganic pigment to obtain the col

Abstract: The present invention relates to a polymer composition, comprising: (i) a polypropylene matrix; (ii) a first elastomeric phase dispersed within the matrix and having a glass transition temperature Tg1, measured with dynamical mechanical thermal analysis according to ISO 6721-2, wherein the first elastomeric phase comprises an ethylene copolymer having comonomer units derived from C3 to C8 olefins; (iii) a second elastomeric phase dispersed within the matrix, wherein the second elastomeric phase is crosslinked and has a glass transition temperature Tg2, measured with dynamical mechanical thermal analysis according to ISO 6721-2, within the range of ?70° C. to ?90° C., wherein the difference between Tg1 and Tg2 is at least 15° C. and Tg1 is higher than Tg2.

Abstract: Propylene polymer composition comprising a polypropylene (A), an elastomeric copolymer (B) of ethylene and at least one ?-olefin comonomer selected form the group consisting of propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene and 1-octene, and an ethylene C2 to C8 alkyl acrylate copolymer (C) wherein the composition has a strain hardening SH3.0/2.5 (at a Hencky strain rate of 3 s?1) of at least 0.5.

Abstract: 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.

Abstract: The invention relates to the use of a polyolefin composition comprising a propylene-ethylene random copolymer having an ethylene content of 0.5-10 wt % and a randomness R of the ethylene distribution in the polymer chain of ?0.945 for the production of articles having high sterilisation resistance.

Abstract: The present invention relates to a crosslinkable polymer composition, comprising (i) a polyolefin, (ii) a polar copolymer, and (iii) a glycerol ester compound.

Abstract: The invention is directed to a process for the manufacture of heterophasic propylene copolymer compositions comprising the steps of forming a propylene polymer matrix in at least one slurry reactor and optionally in at least one gas phase reactor and subsequently forming in at least one gas phase reactor an elastomeric copolymer by copolymerizing propylene with ethylene and/or with another ?-olefin in the presence of said matrix, wherein the polymerization is carried out in the presence of a catalyst system comprising a catalyst in form of solid particles, said particles (a) have a surface area of less than 20 m2/g (b) comprise a transition metal compound of groups 4 to 10 of the periodic table or a compound of actinide or lanthanide, (c) comprise a metal compound of groups 1 to 3 of the periodic table, and (d) comprise inclusions not comprising catalytically active sites.

Abstract: A pressure pipe with increased long-term pressure resistance is comprised of a polypropylene composition. The polypropylene composition is comprised of a polyproyplene copolymer which is at least partially crystallised in the ?-modification.

Abstract: The present technology relates to a foam comprising a polypropylene material. The polypropylene material is produced in the presence of a metallocene catalyst, and the foam and/or the polypropylene has a branching index g? of less than 1.00 and a strain hardening index (SHI@1 s?1) of at least 0.30 measured by a deformation rate d?/dt of 1.00 s?1 at a temperature of 180° C., where the strain hardening index (SHI) is defined as the slope of the logarithm to the basis 10 of the tensile stress growth function (log(?E+)) as a function of the logarithm to the basis 10 of the Hencky strain (log(?)) in the range of Hencky strains between 1 and 3.

Abstract: The present invention relates to a polymer composition with good chemical properties and barrier properties being multimodal and comprising a polymer (A) having a weight average molecular weight of lower than 6000 g/mol and a polyolefine (B) having a higher weight average molecular weight than polymer (A) and a filler (C), whereby a polymer composition without filter (C) has a density of 940 kg/m3 or lower.