Borealis Technology Oy

Borealis Ag

Norner IP as

Scgn as

Siw Bodil Fredriksen

Markku Vahteri

Petri Rekonen

Martin Anker

Leif Leiden

Mats Bäckman

Arild Follestad

Ivar Martin Dahl

Richard Blom

Katrin Nord-Varhaug

Klaus Joachim Jens

Jari Hatonen

Pal Christian Bentzrod

Carlos Barreto Soler

Marjo Väänänen

Erik A Eriksson

Thomas Garoff

Magnus Palmlöf

Bill Gustafsson

Jarmo Lindroos

Virginie Eriksson

Michiel Bergstra

Irene Helland

Tore Dreng

Espen Ommundsen

Vidar Almquist

Svein Stall Eggen

Jorunn Nilsen

Tuomas Noopila

Marit Seim

Marita Savilahti

Mats Baeckman

Pål Christian Bentzrød

Jari Hätönen

Rodney W Rychwalski

Karl Isak Skau

Minna Stalhammar

Young-Soo Ko

Carlos Barreto-Soler

Jari HÄTÖNEN

A process for the manufacture of a modified poly(alkylene carbonate) comprising compounding i) at least one poly(alkylene carbonate) and at least one modifying agent having at least three carboxylic acid groups, or ii) at least one carboxylic acid group and at least one anhydride group, or iii) at least two anhydride groups, at a temperature of 120 to 240&#xb0; C.

Modified poly(alkylene carbonate) composition

A process for purifying a poly(alkylene carbonate), said process comprising the steps of adding said poly(alkylene carbonate) to an aqueous solution, optionally in the presence of an acid compound, in the absence of any organic solvent. subsequently heating said blend to a temperature of up to 200&#xb0; C.; and removing the aqueous phase and drying the residue.

Process for purifying poly (alkylene carbonate)

Coating composition comprising an ethylene copolymer containing not more than 5 mole-% comonomer, whereby the fraction of the ethylene copolymer having a molecular weight of 300 000 g/mol-600 000 g/mol has a methyl branching of more than 4.0 Methyl per 1000 C as determined by SEC/FT-IR analysis.

Coating composition

The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 4 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol, the ratio of the weight average molecular weight to the number average molecular weight, Mw/Mn, of from 15 to 50, a melt index MFRof from 0.05 g/10 min to 5 g/10 min, a melt index MFRof from 0.5 to 10 g/10 min and a density of from 930 kg/m to 955 kg/m. Further, the multimodal ethylene copolymer comprises the multimodal ethylene copolymer comprises from 49 to 59% based on the weight of the multimodal ethylene copolymer a low molecular weight ethylene homopolymer component, said low molecular weight ethylene homopolymer having a weight average molecular weight of from 5000 g/mol to 70000 g/mol; and from 51 to 41% based on the weight of the multimodal ethylene copolymer a high molecular weight ethylene copolymer component, said high molecular weight ethylene copolymer having a weight average molecular weight of from 100000 g/mol to 700000 g/mol. The pipes can be coated with high throughput and good production economy. The coatings have good mechanical properties.

Coated pipe with high throughput using multimodal ethylene copolymer

A multimodal linear low density polyethylene polymer having a final density of 900 to 940 kg/m, and containing at least one &#x3b1;-olefin comonomer in addition to ethylene comprising: (A) 30 to 60 wt % of a lower molecular weight component being an ethylene homopolymer or a copolymer of ethylene and at least one &#x3b1;-olefin; and (B) 70 to 40 wt % of a higher molecular weight component being a copolymer of ethylene and at least one &#x3b1;-olefin, said &#x3b1;-olefin being the same or different from any &#x3b1;-olefin used in component (A) but with the proviso that both components (A) and (B) are not polymers of ethylene and butane alone; wherein the multimodal LLDPE has a dart drop of at least 700 g; and wherein components (A) and (B) are obtainable using a Ziegler-Natta catalyst.

Multi-stage process for producing multimodal linear low density polyethylene polymers

The present inventions relates to a process for producing polyethylene compositions comprising polymerizing polyethylene resins in a cascaded multi-stage reaction in which the reaction steps are performed in at least two slurry phase reactors (A) and (B) and at least one gas phase reactor (C) which are arranged in series in any order wherein in reactor (A) a low molecular weight ethylene homo- or copolymer fraction having a MFRof 100 to 2000 g/10 min, in reactor (B) a low molecular weight ethylene homo- or copolymer fraction having an MFRof 100 to 2000 g/10 min, and in reactor (C) a high molecular weight ethylene copolymer fraction are polymerized, and further comprising a compounding step after polymerization, wherein the final polyethylene composition has a MFRof 3 to 50 g/10 min, the melt flow rates being determined according to ISO 1133.

Multi-stage process for producing polyethylene with lowered gel formation

Coated pipes have a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 4 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol, the ratio of the weight average molecular weight to the number average molecular weight, Mw/Mn, of from 15 to 50, a melt index MFRof from 0.05 g/10 min to 5 g/10 min, a melt index MFRof from 0.5 to 10 g/10 min and a density of from 930 kg/mto 955 kg/m.

Process for coating a pipe with high throughput using multimodal ethylene copolymer, and coated pipes obtained thereof

The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 4 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol and a melt index MFRof from 0.05 g/10 min to 5 g/10 min, a melt index MFRof from 0.5 to 10 g/10 min and a density of from 945 kg/mto 958 kg/m. The coatings have a high stiffness, good properties at elevated temperatures and acceptable stress-cracking properties.

Coated pipes having improved mechanical properties at elevated temperatures and a method of production thereof

The present invention relates to a Ziegler-Natta catalyst comprising a solid, ligand-modified catalyst component formed at least from

Ligand modified Ziegler-Natta catalyst for olefin (co-)polymerization

The present invention relates to a polyethylene composition wherein (i) the composition has an MFRof 0.05 to 100 g/10 min, (ii) the environmental stress crack resistance ESCR measured in hours according to ASTM 1693, condition B and E-modulus EM measured according to ISO 527-2: 1993 in MPa satisfy the following relation: ESCR&#x3e;&#x2212;EM h/MPa+1150 h.

Polyethylene composition for injection moulding with improved stress crack/stiffness relation and impact resistance

A process for the preparation of an olefin polymerisation catalyst comprising: a) reacting an aluminoxane and a Lewis base in an optionally halogenated hydrocarbon solvent to form a particulate suspension; b) reacting said suspension with a metallocene complex in an optionally halogenated hydrocarbon solvent; and optionally c) isolating the olefin polymerisation catalyst.

Process to prepare a particulated metallocene catalyst with a modified aluminoxane and use in polymerization of olefins

The invention provides a supported chromium catalyst system comprising a chromium catalyst precursor bound via at least one heteroatom to a functionalised support, said heteroatom being connected to said support via an organic group.

Supported catalyst

A supported titanium catalyst system comprising a titanium catalyst bound via at least one heteroatom, a functionalized support, said heteroatom being connected to said support via an organic group.

Supported titanium catalyst system

The invention provides a process for the preparation of a supported polymerization catalyst, said process comprising impregnating a porous particulate support in a mechanically fluidized state with a catalyst material.

Supported polymerization catalysts

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Skien, Norway

Siw Bodil Fredriksen