Patent ID: 6070634
Filing Date: 2000-06-06
Classification: B60C,C08L,Y10T

Abstract:
A tire having a tread of a rubber composition comprised of, based upon 100 parts by weight rubber (phr), (A) about 1.5 to about 15 phr of a liquid block isoprene-butadiene copolymer having a molecular weight in a range of about 35,000 to about 75,000 and comprised of about 10 to about 30 percent by weight polyisoprene and about 90 to about 70 percent by weight polybutadiene and (13) 100 phr of a combination of at least one rubber and reinforcement of carbon black and/or silica, said combination consisting essentially of (1) cis 1,4-polyisoprene rubber and reinforcement as carbon black, exclusive of silica, (2) emulsion polymerization prepared styrene-butadiene copolymer rubber and reinforcement selected from at least one of carbon black and silica, (3) cis 1,4-polyisoprene rubber and emulsion polymerization prepared styrene-butadiene copolymer rubber and reinforcement selected from at least one of carbon black and silica and (4) cis 1,4-polyisoprene and cis 1,4-polybutadiene and reinforcement selected from at least one of carbon black and silica.