| 摘要 |
Provided is a thermoplastic resin composition which has excellent thermal discoloration resistance during the retention period of molding and provides a molded article that has excellent fluidity, impact resistance, heat resistance, surface appearance, color developability and vibration damping properties. A thermoplastic resin composition which contains 20-70 parts by mass of a graft copolymer (A) which is obtained by graft copolymerizing a vinyl monomer that is selected from the group consisting of unsaturated nitrile monomers, aromatic vinyl monomers and (meth)acrylic acid ester monomers in the presence of a rubbery polymer (a) having a volume average particle diameter of 80-600 nm and 30-80 parts by mass of a copolymer (B) which is obtained by copolymerizing a vinyl monomer mixture that contains a vinyl monomer selected from the group consisting of unsaturated nitrile monomers, aromatic vinyl monomers and (meth)acrylic acid ester monomers, while essentially containing styrene and a-methyl styrene as aromatic vinyl monomers, with the total of (A) and (B) being 100 parts by mass. |
