Patent ID: 6834697
Filing Date: 2004-12-28
Classification: B60C

Abstract:
A tire having a visible sidewall of a rubber composition comprised of, based upon parts by weight per 100 parts by weight rubber (phr):(A) 100 phr of elastomers comprised of (1) about 30 to about 70, alternately about 35 to about 65, phr of cis 1,4-polybutadiene rubber, (2) zero to about 30, alternately about 5 to about 25, phr of cis 1,4-polyisoprene rubber, and (3) about 30 to about 70, alternately about 40 to about 60, phr of brominated copolymer of isobutylene and p-methylstyrene; (B) about 2 to about 30, alternately about 5 to about 25, phr of a liquid polyalkylene copolymer selected from: (1) a first ethylene/butylene copolymer having a mono-terminal hydroxyl group on one end of the copolymer and an hydrogenated polyisoprene block which contains olefinic double bonds therein on the other end of the copolymer, or (2) a second ethylene/butylene copolymer having a mono-terminal hydroxyl group on one end of the copolymer and an epoxidized polyisoprene block on the other end of the copolymer, and (C) about 15 to about 70 phr of reinforcing filler as: (1) carbon black, or (2) combination of carbon black and synthetic precipitated silica, optionally with a coupling agent having a moiety reactive with hydroxyl groups contained on the precipitated silica and another moiety interactive with said diene-based elastomer(s).