Techno-Umg Co., Ltd.

Naruki Tanaka

Hiroyuki Nomura

Shinji Fujii

A thermoplastic resin composition includes a rubber-reinforced styrenic thermoplastic resin (A1) in an amount of 97 to 80 parts by mass); and a hitting sound reducing material (B) in an amount of 3 to 20 parts by mass. The hitting sound reducing material (B) is a hydrogenated copolymer derived from hydrogenation of a copolymer formed of a block portion (I) primarily including structural units derived from an aromatic vinyl-based compound, and a random portion (II) primarily including structural units derived from an aromatic vinyl-based compound and primarily including structural units derived from butadiene. The structural units in the block portion (I) and the structural units derived from an aromatic vinyl-based compound in the random portion (II) are present in 55 to 80 mass % relative to a 100 total mass % of the copolymer, and the hydrogenated copolymer has a primary dispersion peak of tan &#x3b4; at 0&#xb0; C. or greater.

Thermoplastic composition and molded article thereof

A thermoplastic resin composition includes a resin component (A) in an amount of 97 to 80 parts by mass; and a hitting sound reducing material (B) in an amount of 3 to 20 parts by mass. The hitting sound reducing material (B) is a hydrogenated copolymer derived from hydrogenation of a copolymer formed of a block portion (I) primarily including structural units derived from an aromatic vinyl-based compound, and a random portion (II) primarily including structural units derived from an aromatic vinyl-based compound and derived from butadiene. The structural units derived from an aromatic vinyl-based compound in the block portion (I) and derived from an aromatic vinyl-based compound in the random portion (II) are present in a total content of 55 to 80 mass % relative to a 100 total mass % of the copolymer, and the hydrogenated copolymer has a primary dispersion peak of tan &#x3b4; at 0&#xb0; C. or greater.

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Tokyo, Japan

Naruki Tanaka