Alpha-olefin polymerization catalyst

Details Alpha-olefin polymerization catalyst Alpha-olefin polymerization catalyst

C - Chemistry, Metallurgy

08

F

252/105, 402/643

C08F 4/64 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1136603

ABSTRACT OF THE DISCLOSURE Catalyst for the stereospecific polymerization of alpha-olefins of 3 or more carbon atoms comprising an organoaluminum compound and a component prepared from halogen-containing compound of titanium(IV), organic electron donor, and a pretreatment product of components comprising magnesium alcoholate, Group II or IIIA metal alkyl, and optionally, one or more pretreatment modi- fiers such as a mineral acid or anhydride of sulfur, organometallic chalcogenide derivative of hydrogen sulfide, organic acid or organic acid ester. Prefer- ably, the product obtained from such materials is con- tacted with liquid Lewis acid and mechanically activated prior to polymerization use.

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