RUBBER COMPOSITION FOR TIRE TREAD

摘要: PROBLEM TO BE SOLVED: To obtain a composition which can give tire tread having high wet performances and abrasion resistance without incompatibility therebetween by using rubber comprising blend of styrene/ butadiene with rubber, wherein the carbon black is unevenly distributed throughout in such manner that larger amount present part where present. SOLUTION: It desirable styrene/butadiene rubber(SBR) has styrene content 20-45 wt.%, rubber(BR) cis-isomer 93% or above. The SBR/BR weight ratio desirably range 40/60 to 90/10. total used 40-100 pts.wt. per 100 component, so SBR BR may fall within 20/80. A masterbatch (A) containing (B) are separately prepared, B kneaded diminish difference between moduli sea island sea/island structure.