Catalytic titanium component, process for the manufacture...

Details Catalytic titanium component, process for the manufacture... Catalytic titanium component, process for the manufacture...

C - Chemistry, Metallurgy

08

F

252/109, 400/205

C08F 297/08 (2006.01) C08F 2/00 (2006.01) C08F 4/02 (2006.01) C08F 10/00 (2006.01)

Patent

CA 1147899

A B S T R A C T The invention relates to a catalytic titanium component useful for the polymerization of alkenes-1 and for the copolymerization of alkenes-1 with each other or with ethylene, which titanium component contains a halogenated titanium compound, an electron donor, and a mixture of a magnesium halide and an aluminum halide. The titanium component according to the invention is charac- terized in that it contains 0.1-10 % by wt. of titanium and the titanium : magnesium : aluminium weight ratio amounts to 1 :(0.5-20) : (0.05-2.5), while the magnesium : aluminium weight ratio is at least 3 : 1. With these specific weight ratios, the aluminium halide does not act as an inert filler, but has a very special action, reflected in a particular high activity at good stereospecificity of a catalyst system containing such a titanium component. The catalytic titanium component according to the invention is mainly of importance for stereospecific polymerization of propylene.

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