Patent ID: 6096833
Filing Date: 2000-08-01
Classification: B60C,C08K,Y10T

Abstract:
A rubber composition which comprises a diene base rubber comprising at least 15% by weight of a polybutadiene rubber; silica in an amount of 10 to 80 parts by weight per 100 parts by weight of the diene base rubber; in an amount of 1 to 20% by weight of the amount of silica, a silane coupling agent which is represented by following general formula (1):(C.sub.n H.sub.2n+1 O).sub.3 Si--(CH.sub.2).sub.m --Sy--(CH.sub.2).sub.m --Si(C.sub.n H.sub.2n+1 O).sub.3 ( 1)(wherein n represents an integer of 1 to 3, m represents an integer of 1 to 9, y represents a positive number of 1 or more which has a distribution), and in which the content of trisulfide silane is 20% or more based on the entire polysulfide silane and the content of high polysulfide silane, in which y is 5 or a number greater than 5, is 50% or less; andafter curing, said rubber composition includes closed cells.