| 摘要 |
A new elastomeric composition is described, having an improved combination of characteristics, which is composed of an intimate admixture of (a) 25-85% by weight of a substantially amorphous ethene- alpha -alkene copolymer, having a relatively low X-ray crystallinity of below about 4% by weight; and a tensile strength of at least 10 kg/cm2, and (b) 15-75% by weight of an at least partially crystalline block copolymer of propene and ethene, having an ethene content of between about 1 and 25% by weight and relatively high X-ray crystallinity of at least about 25% by weight. |
