Toyo Stauffer Chemical Co., Ltd.

Shoichi Tokunaga

Atsumi Kato

Yoshikazu Takahashi

Keikichi Baba

Shoji Mizuno

Teruhiro Setoguchi

Kiyoshi Yamane

Tatsuo Kimoto

A high activity supported catalytic component obtained by pulverizing together (a) an anhydrous magnesium halide and (b) a titanium compound in the concomitant presence of 0.1 to 20 wt. % of (c) a liquid aromatic hydrocarbon and/or a liquid aromatic hydrocarbon halide, within the supported catalytic component, at temperature between 0.degree. and 100.degree. C. at which the liquid aromatic hydrocarbon and/or the liquid aromatic hydrocarbon halide remains in a liquid state throughout the whole range of temperature during the pulverization; and a method in which .alpha.-olefin is homo- or co-polymerized in the presence of a catalytic system comprising the high activity supported catalytic component, an organo-aluminum compound and an electron donor.

High activity supported catalytic components and method for homo- or

A method of preparing reformed titanium trichloride catalyst for .alpha.-olefin polymerization which comprises simultaneously pulverizing an organoaluminum compound and a crystalline titanium trichloride compound, the latter comprising titanium trichloride and aluminum trichloride, subsequently treating the pulverized mixture with a solvent selected from oxygen-containing organic compounds, and finally treating the thus treated titanium trichloride with a halide of a metal selected from the groups IV and V of the periodic table.

Method of preparing the catalyst component for .alpha.-olefin

A method for the polymerization or copolymerization of .alpha.-olefin wherein .alpha.-olefin is polymerized or copolymerized in the presence of a catalyst essentially comprising a reformed titanium trichloride and an organoaluminum compound. The reformed titanium trichloride is prepared by simultaneously pulverizing an organoaluminum compound and a crystalline titanium trichloride compound, the latter comprising titanium trichloride and aluminum trichloride, treating the pulverized mixture with a solvent selected from aromatic hydrocarbons, aromatic hydrocarbon halides and organic ethers, separating the treated material from the solvent, and heating the separated material.

Method for the polymerization or copolymerization of .alpha.-olefin

Growing community of inventors

Shinnanyo, Japan

Shoichi Tokunaga