Showa Denko Kabushiki Kaisha

Kiwami Hirota

Hideki Tamano

Shintaro Inazawa

Isamu Yamazaki

Fumio Sakaguchi

Yoichi Toyama

Hisashi Takeuchi

A visbroken propylene-ethylene random copolymer and process for the manufacture thereof having the following characteristics:

Visbroken propylene-ethylene random copolymers, process and films

A process for polymerizing or co-polymerizing propylene in the presence of a catalyst consisting essentially of (A) a solid catalyst component which is prepared by contacting

Process for polymerizing or co-polymerizing propylene

In the method of polymerizing .alpha.-olefins by contacting an .alpha.-olefin under polymerization conditions with a stereospecific catalyst comprising a titanium trichloride component and an organoaluminium compound, the improvement wherein said titanium trichloride component is ground during or after contact with a treating agent, said treating agent being selected from at least one of

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Oita, Japan

Kiwami Hirota