LINEAR BLOCK COPOLYMER AND RESIN COMPOSITION CONTAINING THE SAME

摘要

A linear block copolymer comprising at least two vinylaromatic hydrocarbon polymer blocks (S), at least two conjugated diene polymer blocks (B), and at least one vinylaromatic hydrocarbon/conjugated diene copolymer block (B/S), characterized by having a specific block arrangement in which both terminal polymer blocks are blocks S, each of the blocks S has a block B directly bonded to its inner end, and each of the blocks B has at least one block B/S bonded to its inner end, and by being composed of at least two fractions having different peak molecular weights; and a resin composition comprising the linear block copolymer and a styrene resin in a specific proportion.