STYRENIC RESIN COMPOSITION

摘要

The invention aims at improving remarkably a molding of a high impact styrenic resin composition in plane impact strength to thereby attain a proper balance between plane impact strength and rigidity. The above aim is attained by a styrenic resin composition comprising a styrenic copolymer (A) and a block copolymer (B) composed of a polymer block (b1) made from a styrenic monomer and a polymer block (b2) made from a conjugated diene monomer, in which the styrenic copolymer (A) is a copolymer of a styrenic monomer (a), butyl acrylate (b), and methyl methacrylate (c), and the block copolymer (B) has a multi-layer structure composed of layers of the polymer block (b1) and layers of the polymer block (b2) which are piled up alternately and in which the structural units derived from the conjugated diene monomer account for 9 to 25 % by mass of the styrenic resin composition in terms of raw materials.