Polyolefins

Details Polyolefins Polyolefins

2011-08-02

2011-08-02

Lu, Caixia (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S169000, C526S336000, C502S103000, C502S155000, C502S167000

Reexamination Certificate

active

07989565

ABSTRACT:
Process for making a copolymer by copolymerising (1) ethylene with (2) at least one comonomer selected from aliphatic C3-C20alpha-olefins and (3) 5-ethylidene-2-norbornene, including contacting the monomer with a catalyst comprising a transition metal compound having the following Formula A, and an activating quantity of a suitable activator of the formula shown herein, wherein Z comprises a five-membered heterocyclic group, the five membered heterocyclic group containing at least one carbon atom, at least one nitrogen atom and at least one other hetero atom selected from nitrogen, sulphur and oxygen, the remaining atoms in the ring being selected from nitrogen and carbon; M is a metal from Group 3 to 11 of the Periodic Table or a lanthanide metal; E1and E2are divalent groups independently selected from (i) aliphatic, hydrocarbon, (ii) alicyclic hydrocarbon, (iii) aromatic hydrocarbon, (iv) alkyl substituted aromatic hydrocarbon, (v) heterocyclic groups and (vi) heterosubstituted derivatives of said groups (i) to (v); D1and D2are donor atoms or groups; X is an anionic group, L is a neutral donor group; n=m=zero or 1; y and z are independently zero or integers such that the number of X and L groups satisfy the valency and oxidation state of the metal M.

REFERENCES:
patent: 1 203 778 (2002-05-01), None
patent: WO 00/69923 (2000-11-01), None
patent: WO 02/066486 (2002-08-01), None
patent: WO 2004/083263 (2004-09-01), None
patent: WO 2005/111099 (2005-11-01), None
Tomov, A.K., et al; “Bis(benzimidazole)amine vanadium catalysts for olefin polymerisation and co-polymerisation: thermally robust, single-site catalysts activated by simple alkylaluminium reagents”;Chem. Commun.; (Cambridge, United Kingdom); vol. 17, pp. 1956-1957; Jul. 9, 2004; XP-002362205.

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