Patent ID: 6506829
Filing Date: 2003-01-14
Classification: B60C,C08K

Abstract:
A rubber composition comprising (A) an elastomer containing olefinic unsaturation and (B) 35 to 110 phr of silica filler, wherein said silica filler is comprised of (i) 10 to 100 phr of a first silica having a pore size distribution maximum of the aggregates in the first silica ranging from greater than 55 to 400 nm as determined by mercury porosimetry and an average specific surface area ranging from 60 to 135 m2/g as determined by N2 adsorption; and (ii) 10 to 100 phr of a second silica having a pore size distribution maximum of the aggregates in the second silica ranging from 10 to 40 nm as determined by mercury porosimetry and an average specific surface area ranging from 140 to 250 m2/g as determined by N2 adsorption.