| 摘要 |
<p>A polymeric composition comprising a synthetic styrene-butadiene rubber copolymer or a mixture of two or more synthetic styrene-butadiene rubber copolymers having a butadiene content in the range of 50 to 90% by weight and a styrene content in the range from 10 to 50% based on the total weight of the styrene-butadiene copolymer or mixture of copolymers, the copolymer or mixture of copolymers being suitable for use as a synthetic rubber elastic band.</p> |
