Graft copolymers, thermoplastic resin compositions and molded articles

Abstract

A graft copolymer (A) is formed by graft copolymerization of a monomer component (a2) comprising aromatic vinyl monomers and cyanide vinyl monomers in the presence of an olefinic rubber-like polymer (a1), wherein the nitrogen content in 100% by mass of the graft copolymer is greater than 0% by mass and less than 1.5% by mass. A graft copolymer is provided that exhibits excellent long-term stability in terms of productivity (mechanical stability) and quality. Furthermore, by incorporating it with other thermoplastic resins such as polyphenylene ether resins, it achieves excellent surface appearance, impact resistance, flowability, and heat resistance, while maintaining a low specific gravity and preventing deterioration such as peeling. It also exhibits excellent performance in areas such as noise suppression and possesses electromagnetic properties in the molded product.