| abstract |
Hydrogenated substance of the block copolymer which has a polymer block (A) containing more than 70 mol% of structural units derived from an aromatic vinyl compound, and a polymer block (B) containing 30 mol% or more of structural units derived from a conjugated diene compound. As a hydrogenated substance of the block copolymer which further satisfy | fills the conditions mentioned later. Condition (1): Content of the polymer block (A) in the hydrogenated substance of the said block copolymer is 1-30 mass%. Condition (2): The said conjugated diene compound contains isoprene. Condition (3): In the structural unit derived from the said conjugated diene compound, the sum total of content of a 1, 2- bond unit and a 3, 4- bond unit is 60 mol% or more. Condition (4): The hydrogenation rate of the said polymer block (B) is 60 mol% or more. Condition (5): tanδ measured on the conditions of 0.1% of deformation amount, frequency of 1 Hz, measurement temperature of -70-100 degreeC, and the temperature increase rate of 3 degree-C / min based on JISK7244-10 (2005) is 1.0 or more A series of temperature ranges exist, and the maximum width of the temperature range is 16 ° C or more. |