Nippon A&l Incorporated

Seiji Tamai

Atsushi Hashimoto

Takayoshi Fujiwara

Shunsaku Kubota

Hajime Tomita

Fumitoshi Takeda

Haruki Okuno

Takumi Miyahiro

Masaaki Okada

Kazunori Takahashi

Yoshiaki Takada

Nobuyuki Nakashima

Tomoyoshi Akiyama

Jiichiro Yoshida

Masanori Ito

Shouta Kosaka

Provided is a thermoplastic resin composition having excellent weather resistance, impact resistance, and fluidity and also excellent color developing properties and residence heat stability. A graft copolymer (A) prepared by graft polymerization of a certain amount of a specific monomer ()onto a certain amount of composite rubber () composed of a conjugated diene rubber polymer and a cross-linked acrylic ester polymer. The tetrahydrofuran-soluble portion of the composite rubber () has a weight-average molecular weight of 50000 or more in terms of polystyrene and a degree of swelling in toluene of 7.0 or more, or in the composite rubber contained in the graft copolymer, the number of particles having an equivalent-circle diameter of 150 nm or less is 50% or less of the total number of the composite rubber particles.

Graft copolymer, thermoplastic resin composition, molded article, and method for producing graft copolymer

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Niihama, Japan

Seiji Tamai