In recent years, my country's ethylene industry has developed rapidly, and the rapidly developing ethylene industry has provided a large amount of isoprene-containing C5 fraction resources, enabling the production of a large number of isoprene-based polymers with excellent performance (such as isoprene rubber, Ternary integrated rubber SIBR) becomes possible. With the decreasing of fossil fuel and raw material resources, the automobile industry has higher and higher requirements for tire energy saving. Among them, the new green tire tread compound with low rolling resistance has become a hot spot of research and development and application, and the market potential is huge.

  However, the mechanical properties, especially the dynamic mechanical properties, of the vulcanized rubber obtained from the rubber composition are not ideal, which severely limits its application. Therefore, there is an urgent need in the art to develop a rubber composition and its vulcanizate that have good mechanical properties, low rolling resistance, and excellent abrasion resistance and wet skid resistance.

  It relates to the field of rubber, and specifically discloses a rubber composition, vulcanized rubber and applications thereof. The rubber composition contains diene rubber and carbon black, wherein the diene rubber is a mixture of styrene-isoprene copolymer and butadiene rubber. The rubber composition of the invention has high strength, is not easy to be degraded during the mixing process, and has good carbon black dispersing performance, the rubber composition can maintain good mechanical and physical properties during the mixing process, and is not easy to produce Heat, small elasticity during processing, easy to shape. At the same time, the vulcanized rubber provided by the present invention has higher strength, better physical and mechanical properties, less heat loss and excellent wet skid resistance and wear resistance, and is especially suitable for tire tread rubber.