Rubber composition and tire sidewall with such a composition comprising emulsion styrene/butadiene rubber, cis1,4-polyisoprene rubber and cis 1,4-polybutadiene rubber

摘要

This invention relates to a rubber composition and a tire with a sidewall comprising such a rubber composition. The composition comprises cis 1,4-polyisoprene rubber, particularly natural cis 1,4-polyisoprene rubber, and high cis 1,4-polybutadiene rubber combined with a partial replacement of the cis 1,4-polyisoprene rubber, with a specialized emulsion polymerization styrene/butadiene rubber (E-SBR) having a glass transition temperature (Tg), from -70 to -60°C and a limited bound styrene content in a range of from 12 to 16 percent.