Catalysts for ring-opening copolymerization of cycloolefins

Details Catalysts for ring-opening copolymerization of cycloolefins Catalysts for ring-opening copolymerization of cycloolefins

1981-06-11

1983-07-05

Garvin, Patrick

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

526142, C08F 462

Patent

active

043917372

ABSTRACT:
A catalyst for the ring-opening copolymerization of a hexachlorocyclopentadiene-1,5-cyclooctadiene adduct and a cycloolefin, other than cyclohexene, having 4 to 12 carbon atoms and containing at least one non-conjugated vinylene double bond. Owing to modification by oxy bidentate-type ligands, the chlorotungsten catalyst system affords a more favorable comonomer reactivity ratio and is thus utilized. The catalyst comprises a compound of (a) the reaction product of tungsten hexachloride and a 1,2- or 1,3- dioxy compound; and a compound (b) having the formula R-AlCl.sub.2 where R is an alkyl group having from 2 to 5 carbon atoms.

REFERENCES:
patent: 3492245 (1970-01-01), Calderon et al.
patent: 3535401 (1970-10-01), Calderon et al.
patent: 3784630 (1974-01-01), Maly et al.
patent: 3784631 (1974-01-01), Menapace et al.
patent: 3966637 (1976-06-01), Witte et al.

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