TIRE TREAD RUBBER COMPOSITION

摘要

PROBLEM TO BE SOLVED: To obtain a composition which can give tire treads having low rolling resistance and good wet grip performances and prevent not causing radio disturbance by compounding a tire tread rubber composition prepared by compounding with a rubber with silica with a specified amount of a conductive carbon black. SOLUTION: The rubber used is an arbitrary diene rubber and is exemplified by a natural rubber or a polystyrene butadiene rubber. The silica used is exemplified by arbitrary silica which can be used in usual rubber compounding. The conductive carbon black used is exemplified by acetylene black or Ketjen Black and desirably has a nitrogen specific surface area of 1,000 m<2> /g or above, a BP absorption of 400 ml/100 g or above and a volume resistivity of 10<10>Ω.cm or above. The amount of the conductive carbon black used is 1-3 pts.wt. per 100 pts.wt. rubber. Usual carbon black is also added in an amount of at least 20 pts.wt. on the same basis.