RUBBER COMPOSITION AND TIRE WITH TREAD INTENDED FOR BOTH ON AND OFF-THE-ROAD SERVICE

摘要

A rubber composition comprising, based on parts by weight per 100 parts by weight of elastomer (phr), conjugated diene-based elastomers comprising 55 to 80 phr of a cis 1,4-polyisoprene rubber, and 20 to 45 phr of at least one additional conjugated diene-based elastomer comprising a cis 1,4-polybutadiene rubber and an organic solution polymerization prepared styrene/butadiene rubber (S-SBR) having a bound styrene content in a range of from 12 to 20 percent is disclosed. The rubber composition further comprises 40 to 120 phr of a filler comprising a combination of carbon black and silica, wherein the filler comprises from 2 to 50 phr of carbon black and from 38 to 118 phr of silica and wherein the silica is or comprises a bimodal aggregate size configured silica with a monomodal pore size distribution. This rubber composition may be used in a tire tread.