Patent ID: 6017988
Filing Date: 2000-01-25
Classification: B60C,C08C,C08K,C08L,Y02T

Abstract:
A tire tread rubber composition which is comprised of (1) from about 20 phr to about 60 phr of an asymmetrically tin-coupled polybutadiene rubber, (2) from about 20 phr to about 60 phr of a rubber selected from the group consisting of natural rubber and synthetic polyisoprene, (3) from about 5 phr to about 40 phr of high vinyl polybutadiene rubber having a vinyl content of at least about 80 percent, wherein the high vinyl polybutadiene rubber is a high vinyl polybutadiene rubber other than said asymmetrically tin-coupled polybutadiene rubber, (4) from about 10 phr to about 250 phr of silica, (5) from about 5 phr to about 80 phr of carbon black and (6) a silica coupling agent.