Borealis Technology Oy

Borealis Ag

Borealis Polymers Oy

Boreallis A/s

Borealis Gmbh

Solveig Johansson

Erik A Eriksson

Pauli Leskinen

Jarmo Lindroos

Thomas Garoff

Per-Ola Hagstrand

Kauno Alastalo

Magnus Palmlöf

Ulf Palmqvist

Paivi Waldvogel

Daniel Lindgren

Arja Kostiainen

Marita Sutela

Villgot Englund

Martin Anker

Markku Vahteri

Auli Nummila-Pakarinen

Mats Bäckman

Virginie Eriksson

Olli Tuominen

Ole Jan Myhre

Esa Kokko

Cecilia Rydin

Päivi Waldvogel

Marja Ora

Arja Lehtinen

Jussi Laurell

Christer Lind

Sune Olsson

Björn Voigt

P&auml;ivi Waldvogel

Elisabeth Ribarits

Teija Sihvonen

Jari Aaril&auml;

Anders Wahlstr&ouml;m

Markku Vähteri

Peter Idelmann

Carl-Gustav Ek

Lars Thorn

Mats B&auml;ckman

Eeva-Leena Heino

Harri Lylyharju

The invention relates to power cable polymer composition which comprises a single site polyethylene (SSPE), a power cable, for example, a high voltage direct current (HV DC), a power cable polymer insulation, use of a polymer composition for producing a layer of a power cable, and a process for producing a power cable.

Polymer composition for W and C application with advantageous electrical properties

The present invention relates to an article coated with a composition comprising (A) an ethylene homo- or copolymer resin which has been prepared by using a single-site catalyst further characterized in that component (A) has an MFR, measured according to ISO 1133 at 190&#xb0; C. and under a load of 21.6 kg, from 0.01 to 20 g/10 min. The present invention further relates to an article coated with a composition comprising (A) an ethylene homo- or copolymer resin which has been prepared by using a single-site catalyst further characterized in that component (A) has an impact strength at &#x2212;40&#xb0; C. of at least 80 kJ/min a Charpy notched test according to ISO ISO 179-1/1eA:2000 with a pendulum energy of 15 J. The invention is furthermore directed to the use of the composition for the coating of an article.

Article coated with a composition comprising polyethylene prepared with a single site catalyst

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 polymerization process in which a single-site catalyst (SSC) is used in the polymerization of at least one of fractions (A) and (B), the base resin having (i) a density of below 940 kg/m, and (ii) a MFRat 190&#xb0; 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&#xb0; C. and 4.3 MPa.

Pipe having improved high temperature resistance

A coating composition, a process for producing it and substrate coated therewith are described. The composition comprises a multimodal ethylene polymer, which contains from 80 to 99.8% by weight of ethylene repeating units and from 0.2 to 20% by weight of C-C&#x3b1;-olefin repeating units, and is a blend of at least a first and a second ethylene polymer prepared by polymerization in the presence of a single site catalyst system. The blend has a density of 0.915-0.955 g/cm, a melt flow rate, MFR, of 0.028-1.5 g/10 min., a molecular weight distribution, M/M, of 3-10, and a CTL 5.0 MPa-value according to ISO 6259 of at least 500 hrs.

Coating composition, method of preparation thereof and substrate coated therewith

The present invention relates to a polyethylene composition comprising a polyethylene base resin, which comprises

Multimodal polyethylene resin for pipe made by a single-site catalyst

A process for polymerizing olefins using a high activity catalyst. The catalyst utilize in the present process has a good balance in activity and can be used to carry out ethylene polymerization at high and low melt flow rates to produce low gel or gel free product.

Olefin polymerization catalyst component, its preparation and use

Especially homogeneous supported Ziegler-Natta catalysts may be prepared in a simple one reaction vessel process from a magnesium hydrocarbyloxy starting material which is soluble in a hydrocarbon solvent. The process comprises: (I) reacting a magnesium hydrocarbyloxy compound with a chlorine-containing compound in a non-polar hydrocarbon solvent in which said magnesium hydrocarbyloxy compound is soluble whereby to produce a solution (A); and then either: (II) contacting the solution (A) with a chlorine containing tetravalent titanium compound to produce a solution (B); (III) impregnating solution (B) into a porous particulate support; or (II) impregnating solution (A) into a porous particulate support; and (III) contacting the solid support with a chlorine containing tetravalent titanium compound; or (II) impregnating solution (A) into a porous particulate support pretreated with a chlorine containing tetravalent titanium compound.

Process for preparing a Ziegler-Natta catalyst

High density polyethylene compositions, a process for the production thereof and films prepared

A multimodal polymer composition for pipes is disclosed as well as a pipes made thereof. The polymer is a multimodal polyethylene with a density of 0.930-0.965 g/cm , and a viscosity at a shear stress of 747 Pa of at least 650 Pa.s, said multimodal polyethylene comprising a low molecular weight (LMW) ethylene homopolymer fraction and a high molecular weight (HMW) ethylene copolymer fraction, said HMW fraction having a weight ratio of the LMW fraction to the HMW fraction of (35-55):(65-45). Preferably, the multimodal polyethylene has a viscosity at a shear stress of 2.7 kPa of 260-450 kPa.s; and a shear thinning index (SHI) defined as the ratio of the viscosities at shear stresses of 2.7 and 210 kPa, respectively, of SHI &equals;50-150, and a storage modulus (G&prime;) at a loss modulus (G&Prime;) of 5 kPa, of G&prime; &gE;3000 Pa. The pipe is made of the multimodal polymer composition and withstands a stress of 8.0 MPa gauge during 50 years at 20&deg; C. (MRS8.0). Preferably, the pipe has a rapid crack propagation (RCP) S4-value, determined according to ISO 13477:1997(E), of &minus;5&deg; C. or lower and a slow crack propagation resistance, determined according to ISO 13479:1997, of at least 500 hrs at 4.6 MPa/80&deg; C. The polymer composition affords good non-sagging properties to pipe made thereof.

Polymer composition for pipes

Procatalyst and process for the preparation of a multimodal ethylene polymer

The invention relates to a process for the preparation of a high activity procatalyst for the production of ethylene polymers. The process according to the present invention comprises the following steps:

Procatalyst for ethylene polymer production, method for its preparation

The invention relates to a procatalyst for the production of ethylene polymers, which procatalyst comprises an inorganic support, a chlorine compound carried on said support, a magnesium compound carried on said support, a titanium compound carried on said support, whereby the chlorine compound can be different from or the same as the magnesium compound and/or the titanium compound. The activity balance AB of the procatalyst in specified polymerization conditions, is

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Stenungsund, Sweden

Solveig Johansson