RUBBER COMPOSITION AND TIRE

摘要

Provided are a rubber composition which is improved in dispersion of silica into a rubber composition and improved in both of a low heat build-up and abrasion resistance and which is suitable as a tire tread member and a tire prepared by using the same. In a rubber composition compounded with precipitated silica, a cetyltrimethylammonium bromide-adsorbing specific surface area (CTAB) (m 2 /g) and the mode A ac (mm) in diameters of primary aggregates determined by acoustic measurement of particle size distribution satisfy equation (I) shown below: A ac ‰§ - 0.76 × CTAB + 274
and further an ignition loss (mass reduction % when heated at 750°C for 3 hours) and a heating loss (mass reduction % when heated at 105°C for 2 hours) satisfy equation (II) shown below: ignition loss - heating loss ‰¦ 3