Ube Industries, Inc.

Kansei Corporation

Hikoichi Kamakura

Ikunori Sakai

Tomohiko Akagawa

Kiyoshi Tsutsui

Katsunori Arai

Shigeji Ichikawa

A reinforced polypropylene resin composition contains the following components (A), (B) and (C) in amounts of 67 to 82% by weight of, 6 to 12% by weight and 12 to 21% by weight, respectively: Component (A): crystalline ethylene-propylene block copolymer having an ethylene content of 2 to 4% by weight, a molecular distribution of polypropylene component (Q=M.sub.w /M.sub.n) of at least 7, isotacticity of polypropylene component of at least 98%, an intrinsic viscosity (decalin, 135.degree. C.) of room temperature p-xylene soluble content of at least 6 dl/g, a melt flow rate (MFR) of 3 to 15 g/10 minutes, and the product of flexural modulus at room temperature and Izod impact strength at room temperature of at least 120000. Component (B): at least one elastomer selected from the group of consisting of (a) hydrogenated block copolymer rubbers each comprising block (I) composed of an aromatic vinyl compound copolymer and block (II) composed of a conjugated diene copolymer, and having a bonding structure of I-II or I-(II-I).sub.n (wherein n=1 or 2), wherein block (I) is contained in an amount of 10 to 40% by weight of the copolymer and is hydrogenated in an amount of 10 mol % or less, and block (II) is contained in an amount of 60 to 90% by weight of the copolymer and is hydrogenated in an amount of at least 90 mol %; and (b) ethylene-.alpha.-olefin copolymer rubbers each containing 30 to 95% by weight of ethylene. Component (C): talc having an average particle size of 3 to 5 .mu.m, which is measured by a laser diffraction method, a BET specific surface area of 5 to 13 m.sup.2 /g, and a top cut size of less than 20 .mu.m.

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Matsudo, Japan

Hikoichi Kamakura