Patent ID: 10160853

Abstract:
A thermoplastic resin composition is highly resistant to thermal discoloration during retention in a molding process and provides molded articles excellent in fluidity, impact resistance, heat resistance, surface appearance, color reproduction properties and vibration damping properties. A thermoplastic resin composition includes 20 to 70 parts by mass of a graft copolymer (A) obtained by graft copolymerizing a vinyl monomer selected from unsaturated nitrile monomers, aromatic vinyl monomers and (meth)acrylate ester monomers, in the presence of a rubbery polymer having a volume average particle diameter of 80 to 600 nm; and 30 to 80 parts by mass of a copolymer (B) obtained by copolymerizing a vinyl monomer mixture including vinyl monomers selected from unsaturated nitrile monomers, aromatic vinyl monomers and (meth)acrylate ester monomers, the vinyl monomer mixture including styrene and α-methylstyrene as the aromatic vinyl monomers, (total of the graft copolymer (A) and copolymer (B) is 100 parts by mass).