Borealis Ag

Tuomas Noopila

Erik A Eriksson

Magnus Palmlöf

Markku Vahteri

Martin Anker

Ravindra Tupe

Siw Bodil Fredriksen

Leif Leiden

Jarmo Kela

Jani Aho

Antti Tynys

Michiel Bergstra

Andrey Buryak

Saeid Kheirandish

Thomas Rätzsch

Ilke Senol

Jari Hätönen

The present invention is a process for producing low density copolymers of ethylene and alpha-olefins having from 4 to 10 carbon atoms in three polymerization stages in the presence of an olefin polymerization catalyst where a low molecular weight copolymer of ethylene is produced in two of the stages and a high molecular weight copolymer in one of the stages. The resulting copolymers have a low density of not more than 920 kg/m.

Multistage process for producing polyethylene compositions

A multimodal ethylene copolymer with a density of at least 940 kg/mhaving an MFRin the range of 1 to 30 g/10 min and a F/&#x3bb;ratio of less than 60 cN/s; said ethylene copolymer comprising at least three components (I) an ethylene and optionally at least one C3-20 alpha olefin comonomer component forming 30 to 60 wt % of said ethylene copolymer; (II) an ethylene and optionally at least one C3-20 alpha olefin comonomer second component forming 30 to 60 wt % of said ethylene copolymer: and (III) an ethylene and optionally at least one C3-20 alpha olefin comonomer third component forming 3 to 20 wt % of said ethylene copolymer; wherein at least one of components (II) or (III) is a copolymer.

Multimodal polymer

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

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Helsinki, Finland

Tuomas Noopila