Patent ID: 8580884

Claim:
A novel block copolymer composition comprising: (a) a hydrogenated block copolymer that has at least one block A and at least one block B, and wherein: a. prior to hydrogenation each A block is a mono alkenyl arene homopolymer block and each B block is a controlled distribution copolymer block of at least one conjugated diene and at least one mono alkenyl arene; b. subsequent to hydrogenation about 0-10% of the arene double bonds have been reduced, and at least about 90% of the conjugated diene double bonds have been reduced; c. each A block having a number average molecular weight between about 3,000 and about 60,000 and each B block having a number average molecular weight between about 30,000 and about 300,000; d. each B block comprises terminal regions adjacent to the A blocks that are rich in conjugated diene units and one or more regions not adjacent to the A blocks that are rich in mono alkenyl arene units; e. the total amount of mono alkenyl arene in the hydrogenated block copolymer is about 5 percent weight to about 50 percent weight; and f. the weight percent of mono alkenyl arene in each B block is between about 10 percent and about 75 percent; and (b) about 50 to about 95 percent by weight of a thermoplastic polyurethane elastomer based on the weight of the novel block copolymer composition.