Mitsubishi Chemical Industries Limited

Mitsubishi Kasei Corporation

Hidehito Kato

Yoshinori Suga

Eiji Tanaka

Masaaki Uchida

Yumito Uehara

Nobuo Enokido

Shigeaki Okano

Katsuhiko Hayashi

Hideshige Kato

Masayuki Arai

Kouzou Kitayama

Katsuji Shibata

Tsunemi Yoshioka

A process for producing a copolymer of propylene and other .alpha.-olefins in the presence of a catalyst comprising a titanium-containing solid catalyst component and an organoaluminum compound is disclosed. The process comprises (1) a first step in which propylene is homopolymerized or propylene and a minor proportion of other .alpha.-olefin are copolymerized to prepare polymer particles having a pore volume of from 0.15 to 0.30 cm.sup.3 /g, and (2) a second step in which propylene and other .alpha.-olefin are copolymerized in the presence of said polymer particles. The resulting propylene copolymer particles have improved fluidity and high bulk density.

Process for producing propylene copolymer

A blow molded container made of a polypropylene resin obtained by injection stretch blow molding of a polypropylene resin in which the polypropylene resin is a propylene polymer composition containing from 0.0001 to 10% by weight of 3-methylbutene-1 polymer, as well as medical instruments comprising the blow molded container made of the polypropylene resin.

Blow molded container made of polypropylene resin

A 3-methylbutene-1 polymer composition comprising:

3-Methylbutene-1 polymer composition, process for its preparation and

A process for producing a laminate which comprises laminating a composition comprising from 70 to 98% by weight of a crystalline ethylene-vinyl acetate copolymer having a vinyl acetate content of from 5 to 15% by weight, and from 2 to 30% by weight of a modified ethylene copolymer obtained by graft-polymerizing at least 0.03 and less than 1% by weight of maleic anhydride to a copolymer of ethylene with an .alpha.-olefin of at least 3 carbon atoms having a crystallinity of less than 30%, on a polyamide resin, a polyester resin or a saponified ethylene-vinyl acetate copolymer, in a molten state.

Laminate and process for its production

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Kurashiki, Japan

Hidehito Kato