Patent ID: 6670416
Filing Date: 2003-12-30
Classification: B60C,C08K,C08L,Y02T

Abstract:
A tire tread rubber composition which is comprised of (a) about 60 phr to about 90 phr of a cis-1,4-polybutadiene rubber, wherein the cis-1,4-polybutadiene ruber has a glass transition temperature which is within the range of about âˆ’104Â° C. to about âˆ’80Â° C., (b) about 10 phr to about 40 phr of at least one additional rubbery polymer selected from the group consisting of polysoprene rubber, polybutadine rubber isoprene-butadiene rubber and styrene-isoprene-butadiene rubber, wherein the additional rubbery polymer has a glass transition temperature which is within the range of about âˆ’30Â° C. to about âˆ’10Â° C. and (c) about 20 phr to about 60 phr of carbon black, wherein the carbon black has a dibutylphthalate absorption value absorption value of at least 140 cm3/100 grams and wherein the carbon black has a cetyl trimethyl ammonium bromide adsorption area which is within the range of about 60 to about 90.