Patent ID: 7977428
Filing Date: 2011-07-12
Classification: C08F,C08L

Abstract:
1. A linear block copolymer composition, comprising from 55 to 95 mass % of a vinyl aromatic hydrocarbon and from 5 to 45 mass % of a conjugated diene as monomer units; wherein: the linear block copolymer composition is a mixture comprising linear block copolymers having at least three types of polymer blocks with different molecular weights represented by the following formula: where S is a polymer block comprising a vinyl aromatic hydrocarbon as monomer units, and B is a polymer block consisting of conjugated diene monomer units; a molecular weight distribution (Mw/Mn) of a mixture of the polymer blocks is within a range of from 3.35 to 6; in a gel permeation chromatogram of the mixture of the polymer blocks, M the linear block copolymer composition is obtained by: