| abstract |
Provided is a thermoplastic resin composition which is excellent in heat discoloration at the time of molding and has excellent fluidity, impact resistance, heat resistance, surface appearance of molded articles, coloring property and vibration damping property. A vinyl monomer selected from the group consisting of an unsaturated nitrile monomer, an aromatic vinyl monomer and a (meth) acrylate monomer is graft-copolymerized in the presence of a rubbery polymer (a) having a volume average particle diameter of 80 to 600 nm 20 to 70 parts by mass of the graft copolymer (A), and a vinyl monomer selected from the group consisting of an unsaturated nitrile monomer, an aromatic vinyl monomer, and a (meth) acrylate monomer, wherein the aromatic vinyl monomer (A) and (B) in an amount of 30 parts by mass to 80 parts by mass of a copolymer (B) obtained by copolymerizing a vinyl monomer mixture containing? -Methylstyrene. |