Mitsubishi Kasei Corporation

Mitsubishi Chemical Industries Limited

Ocean Cable Co., Ltd.

Eiji Tanaka

Yoshinori Suga

Yasuo Maruyama

Nobuo Enokido

Satoshi Kato

Eiji Isobe

Toru Tanaka

Kaoru Sato

Hidehito Kato

Masaaki Uchida

Kenichi Mochizuki

Shigeaki Okano

Kiyoshi Funaki

Hidehito Katou

Katsuji Shibata

Tsunemi Yoshioka

Masayuki Arai

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

Disclosed herein are a hydrogenated vinyl aromatic hydrocarbon polymer composition comprising:

Hydrogenated vinyl aromatic hydrocarbon polymer composition and optical

A modified 3-methylbutene-1 polymer as prepared by grafting a monomer containing an unsaturated group onto a 3-methylbutene-1 homo- or copolymer, a 3-methylbutene-1 polymer composition comprising a 3-methylbutene-1 polymer and a fibrous material, and a molded article comprising a mold of a 3-methylbutene-1 polymer and a thin metallic layer provided on the mold.

3-methylbutene-1 polymer, composition containing said polymer, and

A substrate for an optical disc is disclosed, which comprises a transparent hydrocarbon resin having a softening point of not less than 100.degree. C., the surface thereof having been contact treated with a fluorine-containing gas so that the treated surface has a contact angle with water of not more than 90.degree. and the weight gain due to the treatment does not exceed 1% by weight. The substrate exhibits excellent adhesion to a recording layer formed thereon and excellent heat resistance.

Substrate of optical disc

A highly crystalline propylene polymer composition which is obtained by preliminarily polymerizing, in the presence of a catalyst comprising a solid titanium trichloride catalyst complex containing a complexing agent and having an aluminum content of at most 0.15 by atomic ratio of aluminum to titanium and an organoaluminum compound and optionally an electron donative compound, 3-methylbutene-1 in an amount exceeding 10 g per g of the solid titanium trichloride catalyst complex and then polymerizing propylene, or propylene and other .alpha.-olefin having from 2 to 18 carbon atoms, in an amount of at least 500 g per g of the solid titanium trichloride catalyst complex, and which contains from 0.01 to 20% by weight of the 3-methylbutene-1 polymer based on the total weight of the 3-methylbutene-1 polymer-containing propylene polymer composition.

Polypropylene composition and highly transparent polypropylene film made

A method for producing a olefin polymer, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising:

Catalyst for producing an olefin polymer

A method for producing an olefin polymer, which comprises polymerizing or copolymerizing olefins in the presence of a catalyst comprising:

Method for producing an olefin polymer

A method for producing an olefin polymer, which comprises polymerizing or copolymerizing an olefin in the presence of a catalyst comprising (a) a titanium-containing solid catalyst component and (b) an organic metal compound of a metal of Groups I-III of the Periodic Table, said solid catalyst component (a) being obtained by treating (A) a magnesium compound of the formula Mg(OR.sup.1).sub.n (OR.sup.2).sub.2-n wherein each of R.sup.1 and R.sup.2 is an alkyl group, an aryl group or an aralkyl group, and n is 2.gtoreq.n.gtoreq.0, with three compounds i.e. (B) an electron donative compound, (C) a silicon compound of the formula Si(OR.sup.3).sub.4 wherein R.sup.3 is an alkyl group, an aryl group or an aralkyl group and (D) a titanium compound.

A 3-methylbutene-1 polymer composition comprising:

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

Disclosed herein is an optical fiber cable produced by pumping a two-liquid mixing and curing-type polyurethane resin which has the specified values in a tensile break strength, a breaking extension, a creep characteristics and the compression modulus of elasticity, in voids surrounding the optical fibers and those surrounding tension members of the cable.

Optical fiber cable

3-Methylbutene-1 polymer composition and process for its production

Process for producing olefin polymers

In a process for polymerizing an olefin in the presence of a catalyst system combining an organoaluminum compound with a hydrocarbon insoluble solid catalytic component prepared by treating a hydrocarbon solution containing a magnesium compound, a titanium compound and a zirconium compound with an aluminum halide having the formula

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Kawasaki, Japan

Eiji Tanaka