Core-shell polymer, resin composition and molded articles thereof

Abstract

There is disclosed a core-shell polymer which comprises: (a) a core comprising an elastomeric polymer having a glass transition temperature of not more than -30.degree. C. in an amount of 50-90% by weight; (b) an intermediate layer comprising a polymer having a glass transition temperature of not less than 60.degree. C. in an amount of 5-30% by weight; and (c) a shell comprising an aromatic vinyl polymer in an amount of 5-30% by weight, each based on the core-shell polymer, and the total of the core, the intermediate layer and the shell amounting to 100% by weight. Preferably, the core is composed of polybutadiene or polyalkyl acrylate wherein the alkyl has 2-8 carbon atoms, the intermediate layer of polymethyl methacrylate and the shell of polystyrene. A high impact polyphenylene ether resin composition is further disclosed which contains such a core-shell polymer as an impact modifier.

Dependencies are inferred from the claim text.