HYDROGENATED BLOCK COPOLYMER, RESIN COMPOSITION CONTAINING SUCH HYDROGENATED BLOCK COPOLYMER, THEIR CROSSLINKED PRODUCT AND THEIR CROSSLINKED FOAM

摘要

Disclosed is a hydrogenated block copolymer for producing a foam which is excellent in tear strength, compression set resistance, low rebound resilience and wear resistance. Specifically disclosed is a hydrogenated block copolymer of a vinyl aromatic compound and a conjugated diene. This hydrogenated block copolymer is characterized in that: (a) the vinyl aromatic content is more than 35% by weight but not more than 90% by weight; (b) the amount of vinyl aromatic polymer block is not more than 40% by weight; (c) the weight average molecular weight is from 5 x 104 to 100 x 104; and (d) the hydrogenation degree of double bonds derived from the conjugated diene is less than 70%.