Sumitomo Chemical Company, Limited

Syozo Kawamata

Toshio Sasaki

Hiroyuki Kora

Takeshi Ebara

Kiyoshi Kawai

Mituharu Yamasaki

Akinobu Shiga

Kazuki Wakamatsu

Masahiro Kakugo

Hajime Sadatoshi

Junpei Kojima

A solid catalyst component for .alpha.-olefin polymerization containing as catalyst components at least titanium, magnesium and chlorine which are impregnated into an organic porous polymer carrier having a mean particle diameter of 5 to 1,000 .mu.m and a pore volume of 0.1 ml/g or above at a pore radius of 100 to 5,000 .ANG., a catalyst system comprising at least said solid catalyst component (A) and an organoaluminum compound (B), as well as a process for producing .alpha.-olefin polymers using said catalyst system.

Process for producing granular thermoplastic elastomer and granular

Process for producing olefin polymers and catalyst used therein

A process for the production of .alpha.-olefin block copolymer particles having excellent impact resistance at low temperature and excellent molding and processing characteristics, is disclosed. The process includes a two step gas phase polymerization procedure under specific conditions in the presence of a specific catalyst system.

Alpha-olefin block copolymer particles and process for the production

Growing community of inventors

Ichihara, Japan

Syozo Kawamata