Thermoplastic elastomer composition.

摘要

A thermoplastic elastomer composition comprising: 99-1 parts by weight of (i) a hydrogenated diene polymer which is a hydrogenation product of a straight or branched chain block copolymer consisting of (C) a polybutadiene block segment having a 1,2-vinyl content of not more than 20% and (D) a block segment which is a polybutadiene or an alkenyl aromatic compound-butadiene copolymer, the butadiene portion of which has a 1,2-vinyl content of 25-95%, the block structure of said straight or branched chain block copolymer being represented by the formula, C-(D-C)n or (C-D)m in which C means the above-mentioned polybutadiene block segment (C), D means the above-mentioned block segment (D), n means an integer of 1 or more and m means an integer of 2 or more, at least 90% of the double bond in the butadiene portion of the straight or branched chain block copolymer having been hydrogenated, or (i min ) a modified hydrogenated diene polymer in which 0.01 to 10 mole % of at least one functional group selected from the group consisting of carboxyl group, acid anhydride group, hydroxyl group, epoxy group, halogen atom and amino group is added to the hydrogenated diene polymer (i), and 1-99 parts by eight of at least one member selected from the group consisting of a thermoplastic resin and a rubbery polymer. The above thermopalstic elastomer composition has properties comparable to a vulcanized rubber and is useful in various industrial parts.