Patent ID: 6525110
Filing Date: 2003-02-25
Classification: C08K,C08L,Y10T

Abstract:
A rubber composition comprising: (i) 100 parts by weight of at least one rubber selected from the group consisting of natural rubber, polyisoprene rubber, styrenebutadiene copolymer rubber, polybutadiene rubber, acrylonitrilebutadiene copolymer rubber, butyl rubber, a diene rubber and ethylene-propylene copolymer rubber; (ii) from 5 to 100 parts by weight of a polysiloxane surface-treated silica comprising (a) 100 parts by weight of silica surface treated by (b) 0.1-50 parts by weight of a polysiloxane having a repeating unit of the formula (III): wherein R3 independently represents a methyl group, an ethyl group, or a phenyl group, R4 independently represents hydrogen or an organic group, R5 independently represents an alkyl group or acyl group, m is 0 or an integer of 1 or more, and n is an integer of 1 or more; and (iii) a sulfur-containing silane coupling agent in an amount of from 0.5-40% by weight based on the total amount of the silica.