BLOCK COPOLYMER COMPOSITION OBTAINED BY MODIFICATION TREATMENT, METHOD FOR PRODUCING SAME, MODIFIED BLOCK COPOLYMER COMPOSITION USED FOR SAME, AND METHOD FOR PRODUCING SAID MODIFIED BLOCK COPOLYMER COMPOSITION

摘要

The main purpose of the present invention is to provide a block copolymer composition which has good elasticity, while having excellent stress relaxation properties. The present invention solves the above-mentioned problem by providing a block copolymer composition which is obtained by a modification treatment, and which contains a block copolymer (B) that is obtained by introducing a functional group, which is capable of forming a non-covalent bond, into a block copolymer (A) that has at least one aromatic vinyl polymer block and at least one conjugated diene polymer block.