Borealis Ag

Borealis Technology Oy

Nkt Hv Cables Ab

Borealis Gmbh

Per-Ola Hagstrand

Erik A Eriksson

Annika Smedberg

Katja Ellen Klimke

Villgot Englund

Thomas Gkourmpis

Virginie Eriksson

Carl-Olof Olsson

Johan Andersson

Magnus Palmlöf

Mats Bäckman

Tanja Piel

Thomas Hjertberg

Solveig Johansson

Peter Denifl

Carl-Gustaf Ek

Ulf Nilsson

Christian Müller

Martin Anker

Antonios Gitsas

Torvald Vestberg

Markku Vahteri

Jeroen Oderkerk

Dietrich Gloger

Andreas Farkas

Marc Jeroense

Perry Nylander

Mattias Bergqvist

Franz Ruemer

Mattias Andersson

Svein Jamtvedt

Denis Yalalov

Manfred Stadlbauer

Michiel Bergstra

Thomas Steffl

Oscar Prieto

Johannes Wolfschwenger

Christer Svanberg

Anders E Nymark

Fredrik Skogman

Antonis Gitsas

Lars-Erik Ahlstrand

Birgitta Källstrand

Gustavo Dominguez

Liu Rongsheng

Emy Silfverberg

Yingwei Ouyang

Peter Sunnegårdh

Janis Ritums

Jonna Hynynen

Hossein Ghorbani

Jan-Ove Bostrom

Niklas Thorn

Bernt-Åke Sultan

Anders Gustafsson

Anna Hjärtfors

Jan-Ove Boström

Massimiliano Mauri

Anette Johansson

Emil Hjärtfors

Sune Olsson

Åsa Hermansson

Jonas Jungqvist

Pär Lilja

Jonny Brun

Karl Nielsen

Virginie Erikson

Lars Efraimsson

Audrey Frenot Johansson

ÅSa Linder

Magnus PALMLÖF

Christian MÜLLER

Andreas Antal Farkas

ÅSa Hermansson

Birgitta Kallstrand

Peter Sunnegardh

Jarmo Kela

The invention provides a polyolefin composition comprising (i) a polyolefin (A) comprising epoxy groups; and (ii) a polyolefin (B) comprising carboxylic acid groups and/or precursors thereof, with the proviso that at least one of (A) and (B) is polyethylene. Preferably one of (A) and (B) is a low density polyethylene (LDPE) and the other is a polypropylene.

Polymer compositions comprising mixtures of polyolefins

A polymer composition comprising: (i) at least 40 wt % LDPE; (ii) a polypropylene homopolymer; and (iii) a random heterophasic polypropylene copolymer.

Polymer composition for cable insulation

The invention provides a polymer composition comprising a low density polyethylene (LDPE); polypropylene (PP) and a compatibiliser. The invention also relates to cables comprising said polymer composition and the use of the polymer composition in the manufacture of an insulation layer of cable.

Polymer blend composition for wire and cable applications with advantageous electrical properties

The invention relates to power cable polymer composition which comprises a thermoplastic polyethylene having a chlorine content which is less than X, wherein X is 10 ppm, 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.

Power cable polymer composition comprising thermoplastic and having advantageous properties

The invention provides a polymer composition comprising a) a low density polyethylene (LDPE); and b) a conjugated aromatic polymer. The invention also relates to cables comprising said polymer composition and the use of the polymer composition in the manufacture of an insulation layer of cable.

Polymer composition for wire and cable applications with advantageous thermomechanical behaviour and electrical properties

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

A polymer composition includes a crosslinked polyolefin with improved DC electrical properties. Prior to crosslinking, the polymer composition includes a polyolefin and peroxide, in which the peroxide is in an amount of less than 35 mmol &#x2014;O&#x2014;O&#x2014; per kilogram of the polymer composition. A cable can be surrounded by at least one layer including the polymer composition.

Crosslinkable polymer composition and cable with advantageous electrical properties

The invention relates to polymer composition comprising a polyolefin (a) and an inorganic filler (b) wherein the polyolefin (a) is obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (a) from the unreacted products and recovering the separated polyolefin (a) in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil, power cable, for example a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

Polymer composition and cable with advantageous electrical properties

The present invention relates to a polymer composition comprising a polyolefin, peroxide and a sulphur containing antioxidant, wherein said peroxide is present in an amount which corresponds to X mmol &#x2014;O&#x2014;O&#x2014;/kg polymer composition and said sulphur containing antioxidant is present in an amount which corresponds to Y mmol &#x2014;OH/kg polymer composition, wherein Y&#x2264;Y&#x2264;Y, X&#x2264;45 and 0.9*Y+m&#x2264;X&#x2264;n&#x2212;k*Y, wherein Yis 0.50 and Yis 10, and m is 0.8, n is 70 and k is 4.7; and wherein said polymer composition has a melt flow rate (MFR) of less than 1.7, and said polymer composition comprises less than 0.05% by weight (wt %) 2,4-Diphenyl-4-methyl-1-pentene; a crosslinked polymer composition, and use thereof, a power cable insulation, a power cable, useful in high voltage (HV DC) and extra high voltage (EHV DC) direct current applications, and a method for reducing electrical conductivity of a crosslinked polymer composition.

Low MFR polymer composition, power cable insulation and power cable

The invention relates to a polyethylene having a melt flow rate at (2.16) kg loading (MFR), determined according to method ISO1133-1:2011, which MFRis A g/10 min and A&#x2264;A&#x2264;A; wherein Ais (0.5) and Ais (1.70), and containing a total amount of vinyl groups which is B vinyl groups per (1000) carbon atoms, and B&#x2264;B, wherein Bis (0.45), determined according to method ASTM D6248-98, a polymer composition, an article being e.g. a cable, e.g. a power cable, and processes for producing a polyethylene, a polymer composition and an article, and an article; useful in different end applications, such as wire and cable (W&C) applications.

Polyethylene with a high vinyl content and with a low MFR

The invention relates to a foamable ethylene polymer composition comprising at least one antioxidant, at least one process aid and at least 80 wt % of a peroxide-treated ethylene polymer composition. The foamable ethylene polymer composition has melt strength of at least 2 cN, a density of 940 to 970 kg/m3, and dissipation factor measured at 1.9 GHz of 50-80&#x2212;10. The invention further relates to a process for making such a foamable ethylene polymer composition, and use of the foamable ethylene polymer composition in a foamed cable insulation.

Foamable ethylene polymer

A cross-linked polymer composition includes a cross-linked polyolefin. Peroxide in an amount of less than 35 mmol &#x2014;O&#x2014;O&#x2014;/kg polymer composition may be included in the polymer composition prior to crosslinking the polyolefin. Suitable polyolefins that can be cross-linked in the polymer composition include an unsaturated LDPE homopolymer and an unsaturated LDPE copolymer of ethylene with one or more comonomers. Such unsaturated LDPE polymer can contain vinyl groups, and the total amount of vinyl groups present in the unsaturated LDPE can be higher than 0.05/1000 carbon atoms. The cross-linked polymer composition can be used, for example, in producing a cross-linkable and cross-linked article such as a cross-linkable and cross-linked direct current (DC) or other type of power cable.

A transmission cable includes a conductor or a bundle of conductors extending along a longitudinal axis, which is circumferentially covered by an insulation layer having an extruded insulation material, whereby the transmission cable passes the electrical type test as specified in Cigr&#xe9; TB496, whereby the rated voltage Uis 450 kV or more. The type test includes subjecting the power cable to a DC voltage of 1.85*Uduring 10 to 15 cycles at negative polarity, followed by a polarity reversal with another 10 to 15 cycles at positive polarity at a DC voltage of 1.85*U, followed by additional 2 to 5 cycles during at least 4 to 10 days at positive polarity, and wherein Uis 450 kV, or 525 kV, or more.

Electrical HV transmission power cable

The invention relates to a polymer composition comprising polyolefin (a), which is other than low density polyethylene (LDPE), and polyolefin (b), which is an LDPE polymer and obtainable by a high pressure process which process comprises the steps: (i) compressing one or more monomer(s) under pressure in a compressor, using a compressor lubricant for lubrication, (ii) polymerising a monomer optionally together with one or more comonomer(s) in a polymerisation zone, (iii) separating the obtained polyolefin (b) from the unreacted products and recovering the separated polyolefin in a recovery zone, wherein in step (i) the compressor lubricant comprises a non-mineral oil; a power cable, e.g. of a direct current (DC) power cable, use of a polymer composition and a process for producing a DC power cable.

Polymer composition for cable applications with advantageous electrical properties

Growing community of inventors

Stenungsund, Sweden

Per-Ola Hagstrand