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

摘要

Provided is a hydrogenated block copolymer for preparing a foam excellent in tear strength, compression set resistance, low impact resilience, and abrasion resistance. More specifically, provided is a hydrogenated block copolymer comprising a vinyl aromatic compound and a conjugated diene, wherein:
(a) the vinyl aromatic unit content is greater than 35 wt.% and not greater than 90 wt.%,
(b) the vinyl aromatic polymer block content is not greater than 40 wt.%,
(c) the weight average molecular weight is from 5�10 4 to 100�10 4 , and
(d) the hydrogenation ratio of double bonds derived from the conjugated diene is less than 70%.