Patent ID: 6531553
Filing Date: 2003-03-11
Classification: B01J,C08F,Y10S

Abstract:
A process for the polymerization of olefins comprising:a) selecting a conventional supported Ziegler-Natta transition metal compound catalyst component wherein the transition metal compound is of the general formula MRx where M is the metal, R is a halogen, alkoxy, phenoxy or a hydrocarboxyl and x is the valence of the metal; b) contacting the catalyst component with lithium indene; c) forming a catalyst by contacting the catalyst component/lithium compound mixture with an aluminum trialkyl co-catalyst described by the formula AIRâ€²3 where Râ€² is an alkyl of from 1-8 carbon atoms and Râ€² may be the same or different; and d) contacting the catalyst with an external electron donor either simultaneously with or after step (b), said external electron donor having the general formula SiRm(ORâ€²)4-m where R is selected from the group consisting of an alkyl group, a cycloalkyl group, an aryl group and a vinyl group; Râ€² is an alkyl group; and m is 0-3, wherein when R is an alkyl group, R may be identical with Râ€²; when m is 0, 1 or 2, the Râ€² groups may be identical or different; and when m is 1, 2 or 3, the R groups may be identical or different; and e) introducing the catalyst into a polymerization reaction zone containing an olefin monomer; and f) extracting polymer product from the reactor.