Differs has the hydrogenation vinyl aromatic block of the size which the hydrogenation block copolymer

摘要

I will provide a block co-polymer with properties that have been [problem] improvement. Has a conjugated diene polymer block and at least one hydrogenated vinyl aromatic polymer blocks at least two [SOLUTION], alternating hydrogenated block copolymer having a number average molecular weight of each block (Mn) are different.