A thermoplastic elastomer composition comprises the following two components: (a) a thermoplastic polyurethane having soft segments from a poly (3-methyl-1,5-pentane adipate) diol having a molecular weight of at least 2,000 and having a JIS A hardness at 25.degree. C. of not more than 80, and (b) a block copolymer comprising at least 2 polymer blocks A principally comprising an aromatic vinyl compound and at least 1 block B comprising an olefinic elastomer, said aromatic vinyl compound being contained in an amount of 5 to 50% by weight based on the weight of the block copolymer and the olefinic elastomer block having a glass transition point of not higher than -20.degree. C. and a heat of fusion of crystal of not more than 8 cal/g; the ratio by weight between the component (a) and the component (b) being (a)/(b)=95/5 to 5/95.
一种热塑性弹性体组合物包括以下两个组分:(a)热塑性聚
氨酯,其软段来自具有分子量至少为2,000的聚(3-甲基-1,5-
戊二酸酯)二元醇,并且其在25℃下的JIS A硬度不超过80;(b)嵌段共聚物,包括至少2个聚合物块A,主要包含芳香族
乙烯化合物,以及至少1个块B,包含烯烃弹性体,所述芳香族
乙烯化合物在嵌段共聚物重量的5%至50%之间,并且烯烃弹性体块的
玻璃化转变温度不高于-20℃,结晶热不超过8 cal/g;组分(a)和组分(b)的重量比为(a)/(b)=95/5至5/95。