Dsm N.v.

Dsm Copolymer, Inc.

Jacob Renkema

Bernardus J Muskens

Jeroen H Konings

Georges G Evens

Koen Jan Janssen

Petronella Danielle Verweij

Andreas A Oosterlaken

Peter J Windmuller

Henri J H Beelen

Emanuel M J Pijpers

Gerardus Arnoldus Rademakers

The invention relates to an elastomeric copolymer derived from components comprising a) ethylene, b) an &agr;-olefin, c) a non-conjugated polyene (C) having one C&boxH;C bond that is copolymerizable using a Ziegler-Natta catalyst, and d) optionally a non-conjugated polyene (D) which in the molecule contains two or more C&boxH;C bonds that are copolymerizable using a Ziegler-Natta catalyst. The copolymer is characterized by, inter alia, a specific branching coefficient BC. The invention also relates to a process for the preparation of such copolymers.

Elastomeric copolymer and process for the preparation thereof

The invention relates to a catalyst system and a process suited for the preparation of a rubbery copolymer of ethylene, one or more .alpha.-olefins and optionally one or more polyunsaturated compounds, in which the catalyst system comprises a vanadium compound, an organometal compound and optionally a promoter, characterized in that the organometal complex in the catalyst system is an imido complex that satisfies the general formula

Catalyst system for the preparation of a rubbery copolymer

A highly branched polymer in the form of a comb, star, nanogel and structural combinations thereof in which a plurality of polyolefin arms formed of polymers of 1-alkenes are attached to a backbone having repeating units containing aliphatic groups, aromatic groups, heteroatom-containing groups and combinations thereof.

Branched polymers with polyolefin arms

Process for the preparation of an elastomeric polymer from ethylene,

The present invention relates to a catalyst. The catalyst contains a transition metal-imidoaryl complex which contains at least one amido group bound to the transition metal and wherein the aryl group is a 2,6-di-substituted phenyl group. The catalyst can be used in polymerizing olefins. The transition metal is chosen from groups 3-6 of the periodic table.

Catalyst and process for a ziegler polymerisation

The present invention relates to a catalyst and a process for the preparation of an olefin polymer, which catalyst comprises a transition metal component and an organometal component. The transition metal component comprises a transition metal atom onto which an imidoaryl ligand is bound. More specifically the transition metal is vanadium or titanium.

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Born, Netherlands

Jacob Renkema