Catalyst composition

Details Catalyst composition Catalyst composition

C - Chemistry, Metallurgy

08

F

402/613, 402/636

C08F 4/68 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01)

Patent

CA 1207741

ABSTRACT OF THE DISCLOSURE Vanadium compound/organometallic compound/inorganic oxide cata- lyst compositions useful for the polymerization of ethylene to polymers having a molecular weight distribution that can be controlled by selec- tion of the appropriate member of a particular family of vanadium com- pounds are obtained by using, as the vanadium component, at least one vanadium compound prepared by reacting one molar proportion of VOCl3 and/or VOBr3 with about 0.5 to 1 molar proportion of a diol corresponding to the formula HO-R-OH, wherein R is a divalent hydrocarbon radical hav- ing a chain length of 2 to 16 carbon atoms. The molecular weight distri- butions of polymers formed in the presence of the catalyst compositions are narrowed as the chain length of R is increased. The preferred vana- dium compounds are those prepared by reacting VOCl3 with a diol wherein R is a straight- or branched-chain alkylene group containing 2 to 6 car- bon atoms.

441360

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