Abstract: A process for producing polyolefins, which includes polymerizing at least one olefin monomer, separating at least a part of the reaction mixture, dividing the separated reaction mixture into a polymer-lean fraction and a polymer-rich fraction, and subjecting at least a part of the polymer-lean fraction to a purification step prior to recycling back to the polymerization of at least one olefin monomer. The obtained polyolefins particularly have a low content of volatile low molecular weight compounds, a low content of low-molecular weight polyolefin waxes and a low content of residues derived from the catalyst employed.

Abstract: 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.

Abstract: A propylene polymer composition having a high impact strength and a high stiffness for the manufacture of parts having an excellent surface quality comprising A) 70 to 98 wt.-% of a heterophasic propylene copolymer with ethylene or an alpha-olefin with 4 to 12 carbon atoms, the propylene copolymer, which contains more than 60 wt.-% propylene, having a melt flow rate (MFR2) of 0.5 to 50 g/10 min and a ratio between elastomer molecular weight and total molecular weight expressed as Mw/Mw(XCS) of more than 0.8, Mw being the weight average molecular weight of the propylene copolymer and Mw(XCS) being the weight average molecular weight of the propylene copolymer which is soluble in xylene at +23° C., and the propylene copolymer further containing a portion of 5 to 35 wt.-% soluble in xylene at +23° C. (XCS content), B) 2 to 30 wt.-% of a mineral filler, C) 0.0001 to 1.0 wt.

Abstract: The invention refers to a process for preparing a Group 2 metal/transition metal olefin polymerization catalyst component in particulate form having an improved polymerisation properties due to the addition of a phosphorous compound during catalyst component preparation and the use thereof in a process for polymerising olefins.

Abstract: 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.

Abstract: The present invention relates to a composition for cross-linking and stabilization of a polymer containing hydrolysable silane groups comprising a sulfonic 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): R??—(S)p—R????(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 sta

Abstract: 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 ?m 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 ?m 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 ?m at the half height of a particle protruding from the surface of the tape sample.

Abstract: The invention relates to a multimodal polyethylene copolymer resin composition comprising (a) a lower molecular weight (LMW) ethylene polymer fraction and (b) a higher molecular weight (HMW) ethylene copolymer fraction, wherein the higher molecular weight (HMW) ethylene copolymer fraction comprises (b1) a higher molecular weight (HMW) ethylene copolymer subfraction having a weight average molecular weight at least 2 times the weight average molecular weight (Mw) of said multimodal polyethylene copolymer resin composition, which (b1) higher molecular weight (HMW) ethylene copolymer subfraction amounts from about 1-30 wt % of the total amount of the multimodal polyethylene copolymer resin composition and comprises comonomers in amount of at least about 1 wt % of the total amount of comonomer present in said multimodal polyethylene copolymer resin composition, a process for its preparation and its use.

Abstract: The application relates to a process for preparing a crosslinked cable, including:—applying one or more layers including a polymer composition on a conductor, wherein at least one layer includes one or more free radical generating agents,—crosslinking by radical reaction said at least one layer comprising said free radical generating agent(s),—cooling the obtained crosslinked cable in pressurized conditions.

Abstract: 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.

Abstract: The present invention relates to a semiconductive polymer composition comprising an 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 semiconducting 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.

Abstract: The present invention relates to polyolefin compositions comprising man-made cellulose fibers of very high modulus to improve the mechanical performance of said compositions while retaining a low density. The present invention further relates to a melt mixing process with controlled shear intensity and energy input especially suitable for the production of said compositions.

Abstract: The present invention relates to a process for the production of propylene copolymers wherein in a first step an olefin polymerisation catalyst comprising a solid catalyst component is subjected to a prepolymerisation reaction in a prepolymerisation 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 copolymerised in the presence of the prepolymerised catalyst produced in the first step so that a propylene copolymer is obtained which contains at least 0.

Abstract: The application relates to a method for modifying a polymer composition, to modified polymer compositions, to an article, preferably wire or cable, including said modified polymer composition, to a process for preparing an article, preferably a wire or cable, to the use of said modified polymer in one or more layers of a wire or cable, as well as to a compound for use as a radical generating agent for modifying a polymer composition.

Abstract: The invention relates to a method for modifying a polymer composition, to modified polymer compositions, to an article, preferably wire or cable, including said modified polymer composition, to a process for preparing an article, preferably a wire or cable, to the use of said modified polymer in one or more layers of a wire or cable, as well as to a compound for use as a radical generating agent for modifying a polymer composition.

Abstract: The application relates to a process for preparing a crosslinked cable, including: —applying one or more layers including a polymer composition on a conductor, wherein at least one layer includes one or more free radical generating agents, —crosslinking by radical reaction said at least one layer including said free radical generating agent(s), —cooling the obtained crosslinked cable in pressurized conditions, and —reducing or removing the content of volatile decomposition products(s), which are originating from optionally in elevated temperature, from the crosslinked cable obtained from cooling and recovery step.

Abstract: Multi-branched polypropylene having a g? of less than 1.

Abstract: The present invention relates to an adhesive composition providing high peel strength in particular at high temperatures, an article comprising a layer of the adhesive and the use of the adhesive.

Abstract: 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.

Abstract: The present invention concerns a propylene copolymer composition, a molded article comprising the composition and the use of the propylene copolymer composition for preparing molded articles, preferably pipes.