Patent ID: 9321874
Filing Date: 2016-04-26
CPC Classification: C08F,C08L

Claim Text:
1. A hydrogenated block copolymer, which is obtained by hydrogenating a block copolymer comprising: two or more polymer blocks (a) each comprising a structural unit derived from an aromatic vinyl compound, and one or more polymer blocks (b) each comprising structural units derived from isoprene and 1,3-butadiene, wherein a mass ratio of the structural unit derived from isoprene to the structural unit derived from 1,3-butadiene is in a range from 48/52 to 42/58, wherein the hydrogenated block copolymer has a crystallization peak temperature of 2 to 15° C. and a crystal melting heat quantity of 17 to 25 mJ/mg, wherein the crystallization peak temperature is defined as a peak top temperature of an exothermic peak observed when a temperature of a sample is increased from 30° C. to 150° C. at a rate of temperature increase of 10° C./min and then the sample is cooled to −100° C. at a rate of temperature decrease of 10° C./min, the peak top temperature being measured with a differential scanning calorimeter, and wherein a content of the polymer blocks (a) in the hydrogenated block copolymer is 20 to 34 mass %.