RUBBER COMPOSITION FOR TIRE

摘要

PURPOSE:To obtain titled composition of lower heat generation, high reinforcement and durability and effective for increasing rolling resistance when used for materials other than tread, by incorporating a diene rubber component with a carbon black having a specific sophisticated structure. CONSTITUTION:The objective composition comprising (A) 100pts.wt. of a diene rubber component and (B) 30-60 (pref. 40-50)pts.wt. of a carbon black whose characteristics are: (1) nitrogen absorption (N2SA)...35-105 (pref. 35-65)m<2>/g (2) DBP oil absorption ...140-200ml/100g (3) 24M4DBP oil absorption ...60- 120ml/100g and (4) DELTADBP (=DBP oil absorption minus 24M4DBP oil absorption)...50-110 (65-110)ml/100g. Higher proportion of the sophisticated structure due to weak bond (represented by DELTADBP) will lead to an improved carbon black with advantages in terms of both high durability and low heat generation.