Showa Denko Kabushiki Kaisha

Toyo Cloth Co., Ltd.

Isamu Yamazaki

Fumio Sakaguchi

Kiwami Hirota

Kenji Takemura

Yoshifumi Nishibayashi

Toshimitsu Sasaki

Tadao Suzuji

Yoichi Toyama

Hisashi Takeuchi

Tadao Suzuki

Kazunobu Shiozawa

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

Method of polymerizing .alpha.-olefins

An ethylene resin composition comprising an ethylene polymer, or a copolymer of ethylene with one or more components copolymerizable with ethylene, and alumina trihydrate having a gibbsite crystal structure, and various moldings produced from the ethylene resin composition having excellent physical and chemical properties are disclosed.

Ethylene resin composition

A synthetic resin composition which comprises 20 to 50 parts by weight of olefinic resins, 10 to 40 parts by weight of vinyl chloride resins, and 70 to 10 parts by weight of alumina trihydrate having a gibbsite crystal structure whose average particle size is 30 microns at most.

Synthetic resin composition

Growing community of inventors

Kawasaki, Japan

Isamu Yamazaki