| 摘要 |
A rubber composition comprising (A) from 10 to 90% by weight of a random styrene-butadiene copolymer having a bound styrene content of from 3 to 30% by weight and a butadiene portion which has a 1,2 content of from 60 to 95% by weight, said copolymer being obtained by polymerization in the presence of an organoalkali metal catalyst and (B) from 90 to 10% by weight of at least one rubber having a glass transition temperature not higher than {40 DEG C, said rubber being natural rubber, polyisoprene rubber, styrene- butadiene copolymer rubber or polybutadiene rubber, has improved wet skid and heat build-up properties and is useful as a rubber for automobile tyre treads. |
