Tire with sidewall comprised of emulsion styrene/butadiene rubber, cis 1,4-polyisoprene rubber and cis 1,4-polybutadiene rubber

摘要

This invention relates to a tire with a sidewall composition comprised of 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, particularly natural rubber, with a specialized emulsion polymerization styrene/butadiene rubber (E-SBR) having a glass transition temperature (Tg), similar to the Tg of natural cis 1,4-polyisoprene rubber, from about −70 to about −60° C. and a limited bound styrene content in a range of from about 12 to about 16 percent.