Abstract: 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.

Abstract: The present invention relates to a process for preparing a propylene random copolymer comprising polymerization of propylene with a comonomer, said comonomer being ethylene or an ?-olefin comprising at least four carbon atoms, in the presence of a catalyst in a multistage process comprising polymerization of propylene with a comonomer in a first reaction zone including at least one slurry reactor to give a first polymerization product, transferring said first product to a second reaction zone including at least one gas phase reactor and polymerizations of propylene with a comonomer in said gas phase reactor in the presence of said first polymerization product, wherein the temperature in the gas phase reactor is at least 10° C. higher than in the slurry reactor and to a polymer obtainable by this process.

Abstract: The invention provides a method and apparatus for monitoring subsurface chromium depletion from a steel member, such as a pyrolysis pipe. In the harsh conditions of a pyrolysis furnace, chromium within the pipe 16 migrates towards the pipe surface which results in the formation of a chromium depleted layer 14. This layer can provide useful data about the condition and operation of the furnace. The degree of chromium depletion is measured by using a magnetic source of known strength to create a magnetic field in the surface region of the pipe 16. An estimate of the thickness of the chromium depleted layer 14 is determined from the resultant magnetic flux, which can be measured by a hall element arranged at substantially 45° to the longitudinal axis of the magnet.

Abstract: The invention provides a process for the preparation of a propylene polymer in which proplylene and a comonomer copolymerizable therewith and of greater molecular weight than propylene are polymerized in a single site catalyst catalized polymerization reaction, characterized in that said polymerization reaction is effected at least in part at a temperature of at least 70° C.

Abstract: The invention provides a process for producing an olefin polymerisation catalyst, comprising an organometallic compound of a transition metal or of an actinide or lanthanide, in the form of solid catalyst particles, comprising forming a liquid/liquid emulsion system which comprises a solution of one or more catalyst components dispersed in a solvent immiscible therewith; and solidifying said dispersed phase to convert said droplets to solid particles comprising the catalyst and optionally recovering said particles.

Abstract: An ethylene polymer composition having a density of 935 to 950 kg/m3, a dynamic Viscosity ?0.05 measured at a frequency of 0.05 rad/s of 2000 to 7000 Pa-s and a shear thinning index SHI1/100 of 4 to 15 is provided. Due to said combination of properties the composition of the invention can be processed with high production rates to end products with good properties, e.g. in terms of appearance and transparency, which are very desirable in many application areas such as moulding including film applications.

Abstract: A crosslinkable silane containing polyethylene composition, an insulated electric cable, and a process for the preparation of the composition are described. The crosslinkable silane containing polyethylene composition has a silane content of about 0.1 to 10% by weight, and at least one silanol condensation catalyst, and is characterised in that the composition has a branching parameter (g?) value of at least 0.65. The insulation of the electrical cable comprise the composition as a polymer. The process is characterised in that it is a high pressure polymerisation process at a peak temperature of at most 260° C.

Abstract: The present invention relates to a process for the production of a propylene polymer in a multistage polymerization process comprising the polymerisation of propylene in the presence of a catalyst in a first reaction zone comprising at least one slurry reactor to give a first polymerisation product, transferring said first product to a second reaction zone comprising at least one gas phase reactor and continuing polymerisation of propylene in the gas phase in the presence of said first polymerisation product which is characterised in that the temperature in both the slurry and the gas phase reactor is at least 75° C. and the product of at least one reactor is having an ethylene content in the range of 0.05 to 0.5 wt %. Furthermore, the invention relates to a propylene polymer obtainable by the inventive process, to a propylene polymer which is characterised in that it comprises ethylene comonomer in an amount of 0.05 to 0.5 wt. %, is having a xylene solubles contents of 3.0 wt.

Abstract: A polymer composition for extrusion coating with good process properties comprising a multimodal high density polyethylene (A) and a low density polyethylene.

Abstract: The present invention relates to an insulating composition for an electric power cable which comprises a polyolefin, an antioxidant, and a polar copolymer. Further, the present invention relates to an electric power cable comprising an insulating layer including a composition according to the present invention, and to the use of a polar copolymer for improving the storage stability, i.e. reducing the exudation of an antioxidant, in an insulating polymer composition. Thereby, said composition comprises polar monomer units in a comparatively small amount, e.g. in an amount of polar monomer units in the total polymer part of the composition from 1 to 100 micromol (1·10?6 to 100·106 mol) per gram of polymer in addition to an antioxidant.

Abstract: A low voltage power cable having an insulation layer with a density below 1100 kg/m3, which has a polyolefin having 0.002-4% mol of a compound that has polar groups and further having a compound that has hydrolysable silane groups and includes 0.0001-3% weight of a silanol condensation catalyst and a process of manufacturing such a cable.

Abstract: The invention is directed to a process for producing a particulate support for an olefin polymerisation catalyst wherein a solution of a magnesium compound is contacted with a solution of an element of Group (13 or 14) of the Periodic Table (IUPAC) to obtain a solid reaction product. In the process of the invention the solid reaction product is formed by: i) contacting (a) a solution of a magnesium hydrocarbyloxy compound with (b) a solution of a halogen-containing compound of an element of Group (13 or 14) of the Periodic Table (IUPAC); and ii) recovering the solidified reaction product from the reaction mixture.

Abstract: The present invention relates to a polyethylene resin comprising A) a first ethylene homo- or copolymer fraction, and B) a second ethylene homo- or copolymer fraction, wherein fraction (A) has a lower molecular weight than fraction (B), characterized in that the polymer resin powder obtained directly after the final polymerisation step has a particle size distribution PSD95/5 equal to or smaller than 12. Furthermore, the invention relates to a process for the production of a polymer composition comprising: (i) a step in which ethylene monomers, and optionally further alpha-olefin-comonomers, are polymerised in liquid phase in the presence of a polymerisation catalyst, (ii) a step in which ethylene monomers, and optionally further alpha-olefin comonomers, are polymerised in the gas phase in the presence of a polymerisation catalyst, and (iii) obtaining a polymer resin powder after the final polymerisation step wherein the powder has a particle size distribution PSD95/5 equal to or smaller than 12.

Abstract: A peroxide crosslinked ethylene polymer pressure pipe and a method for the preparation thereof are described. The pipe is characterised in that it comprises an ethylene polymer with a density of less than 950 kg/m3 obtained by polymerisation with a single-site catalyst and having a shear thinning index, SHI5/300 of less than 20 and a MWD of <10. The method is characterised in that it comprises polymerising ethylene, optionally together with at least one comonomer, with a single-site catalyst to provide the above defined ethylene polymer, forming the ethylene polymer into a pipe by extrusion and crosslinking it.

Abstract: Pipes having a design stress of at least 9.0 MPa are produced by using a new bimodal polyethylene composition of particular properties compounded with carbon black.

Abstract: The present invention relates to a flame retardant polymer composition comprising (A) an olefin homo- and/or copolymer comprising a polar olefin copolymer, (B) a silicone-group containing compound, (C) an inorganic filler, and (D) a nanofiller. Furthermore, the invention relates to the use of such a composition in a wire or cable and to a wire or cable having a layer comprising such a composition.

Abstract: 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.

Abstract: A road restraint system part is made of polyolefin material having an energy absorption of at least 10 kJ/m2 at +23° C. and at least 5 kJ/m2 at ?20° C. (determined according to ISO 179/1eA with notched specimens).

Abstract: 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.

Abstract: A multimodal copolymer of ethylene comprising at least (i) a lower molecular weight fraction of a copolymer of ethylene and at least one alpha-olefin comonomer and (ii) a higher molecular weight fraction of a copolymer of ethylene and at least one alpha-olefin comonomer, wherein said copolymer has a density below 920 kg/m3.