Exhaustively prepolymerized supported alpha-olefin polymerizatio

Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...

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502108, 502109, 502118, 502134, C08F 464

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active

045798362

ABSTRACT:
An exhaustively prepolymerized supported olefin polymerization catalyst component comprises solid, hydrocarbon-insoluble, magnesium-containing, titanium-containing catalyst particles which have been contacted with an olefin monomer and an organo-aluminum co-catalyst under exhaustive prepolymerization conditions at an Al/Ti atomic ratio such that the weight of prepolymer formed is less than 10 times the weight of such catalyst particles and the resulting prepolymerized catalyst particles essentially are inactive to further polymerization.

REFERENCES:
patent: 4295991 (1981-10-01), Wristers
patent: 4304891 (1981-12-01), Sato et al.
patent: 4324693 (1982-04-01), Arzoumanidis et al.
patent: 4326988 (1982-04-01), Welch et al.
patent: 4508843 (1985-04-01), Etherton et al.

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