Patent ID: 8273820
Filing Date: 2012-09-25
Classification: B60C,C08K

Abstract:
1. A rubber composition compounded with precipitated silica, wherein the rubber component is at least one rubber selected from the group consisting of natural rubber, synthetic polyisoprene rubber, polybutadiene rubber, and styrene-butadiene rubber and wherein in the precipitated silica, a cetyltrimethylammonium bromide-adsorbing specific surface area (CTAB) (m 2 /g) and the mode A a , (nm) in diameters of primary aggregates determined by an acoustic measurement of particle size distribution satisfy equation (I) shown below: wherein the mode A and 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: