Method for preparing isotactic high molecular weight polymers

Details Method for preparing isotactic high molecular weight polymers Method for preparing isotactic high molecular weight polymers

C - Chemistry, Metallurgy

08

F

402/576, 402/584

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

Patent

CA 1120198

Abstract of the Disclosure An improved method for polymerizing alpha-olefins under low pressure in the presence of a modified Ziegler- Natta catalyst comprising a mixture of an organo-aluminum compound and a compound of a transition metal of groups IV-B, V-B, VI-8, and VII-8 of the Periodic Table, together with a quantity of Groups I-A and II-A organophosphide in an amount of from about .01 to about .15 moles based upon the amount of organo-aluminum compounds present. Catalysts of the instant invention provide highly isotactic polymers. The amount of metal organophosphide added is critical to obtaining these objectives.

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