A thermoplastic elastomer composition comprising (I) 100 parts by weight of at least one block copolymer formed by addition polymerization which is selected among block copolymers which comprise a polymer block (A) consisting of aromatic vinyl units and a polymer block (B) consisting of conjugated diene compound units and which have been crosslinked in the polymer block (A) preferably with a structural unit derived from a (C
1
-C
8
alkyl)styrene and/or functional group and among products of hydrogenation of the copolymers, (II) 10 to 300 parts by weight of a polyolefin, and (III) 0 to 300 parts by weight of a softener (III) for rubbers; and a process for producing the composition. The composition has excellent strain recovery at high temperatures and satisfactory moldability, is flexible, and has satisfactory rubber properties. It is effectively useable in various applications.
一种热塑性弹性体组合物,包括(I)重量为100份的至少一种加成聚合形成的嵌段共聚物,所述嵌段共聚物被选自包括聚合物块(A)由芳香
乙烯单元组成和聚合物块(B)由共轭二烯化合物单元组成的嵌段共聚物,并且已在聚合物块(A)中用来自(C1-C8烷基)
苯乙烯和/或功能基的结构单元进行交联,以及在嵌段共聚物氢化产物中的产物,(II)重量为10至300份的聚烯烃,以及(III)重量为0至300份的橡胶软化剂(III);以及生产该组合物的过程。该组合物在高温下具有优异的应变恢复性能和令人满意的可成型性,具有柔韧性和令人满意的橡胶性能。它可在各种应用中有效地使用。