Catalyst component for .alpha.olefin polymerization and use...

Details Catalyst component for .alpha.olefin polymerization and use... Catalyst component for .alpha.olefin polymerization and use...

C - Chemistry, Metallurgy

08

F

252/109, 402/645

C08F 4/16 (2006.01) C08F 4/60 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1140523

ABSTRACT OF DISCLOSURE A supported titanium catalyst component for use propylene polymerization is prepared by copulverizing a mixture of magnesium dichloride, titanium tetrachloride-ethylbenzoate 1:1 adduct and hexachloroethane for 20 to 44 hrs., and then treating the resulting titanium-containing solid with n-heptane solution of hexachloroethane. Bulk polymerization of propylene in the presence of H2 with the catalyst composed of the supported titanium catalyst component and the organo aluminum catalyst component composed of triisobutyl aluminum and ethylbenzoate at 68°C for half an hour gives higher catalyst efficiency (above 200,000 g PP/g-Ti) and sufficient heptane insolubles (92 to 97%).

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