In thermoplastic elastomeric compositions comprising blends of crystalline polypropylene and rubber selected from natural or synthetic polyisoprene rubber, polybutadiene rubber and styrene-butadiene rubbers, in which the rubber is present as a dispersion of small particles, the rubber is cured with a phenolic curative, a urethane curative or a sulfur-donor curative to give a blend such that the product of its true stress at break (TSB) times its elastic recovery (R) is at least 70 megapascals.
在由结晶聚
丙烯和选自天然或合成聚
异戊二烯橡胶、聚
丁二烯橡胶和
丁苯橡胶的橡胶混合物组成的热塑性弹性体组合物中,橡胶以小颗粒分散体的形式存在,橡胶用
酚醛固化剂、聚
氨酯固化剂或
硫代固化剂固化,使混合物的真实断裂应力(TSB)乘以弹性回复率(R)的乘积至少为 70 兆帕。