Ube Industries, Inc.

Toyota Jidosha Kabushiki Kaisha & Ube Industries, Ltd.

Shinji Katsui

Tomohiko Akagawa

Kouhei Ueno

Saburo Hinenoya

Norihisa Tamashima

Takeyoshi Nishio

The polypropylene resin composition of the present invention comprises specific proportions of a crystalline ethylene-propylene block copolymer, an hydrogenated block copolymer, an amorphous ethylene-propylene copolymer, surface-treated talc, fibrous magnesium oxysulfate of granular form and a metal soap. This resin composition is well balanced in rigidity and impact resistance, has good mar resistance, and can be preferably used in large-sized parts for automobiles, particularly instrument panels for automobiles.

Polypropylene resin composition

A polypropylene resin composition obtained by mixing a crystalline ethylene-propylene block copolymer, an amorphous ethylene-propylene copolymer, talc and fibrous magnesium oxysulfate and then, at the time of melt-kneading the mixture, adding a metal soap to the mixture, retains the fiber length of the fibrous magnesium oxysulfate and has high rigidity with the addition of a small amount of the metal soap.

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Sakai, Japan

Shinji Katsui