Patent ID: 6228908
Filing Date: 2001-05-08
Classification: B60C,C08C,C08K,C08L,Y02T

Abstract:
An elastomer composition adapted for use in forming the treads of tires having highly balanced wet traction, rolling resistance, ice and snow traction, and fracture property comprising a rubber material comprising:(a) from 20-100 percent by weight of a diene polymer or copolymer composition which comprises a mixture of:(i) from about 10 to about 80 percent by weight of a diene polymer or copolymer of a diene monomer and a vinyl aromatic hydrocarbon monomer containing carbon-tin bonds in the main polymer of copolymer chain; and(ii) from about 90 to about 20 percent by weight of a diene polymer or copolymer of a diene monomer and a vinyl aromatic hydrocarbon monomer containing terminals formed by reacting living diene polymer or copolymer chains having organoalkali or organoalkaline earth metal terminals with an hydrodroxysilane compound selected from the group consisting of unsubstituted and substituted tetraalkoxysilane compounds, alkylalkoxysilane compounds, arylalkoxysilane compounds, alkenylalkoxysilane compounds, and halogeno-alkoxysilane compounds; and(b) from 0 to 80 percent by weight of a rubber selected from the group consisting of natural rubber, polybutadiene rubber, styrene-butadiene rubber and mixtures thereof;a reinforcing filler in an amount of 10 to 150 parts by weight based on 100 parts by weight of the rubber material, wherein the filler is selected from the group consisting of silica and mixtures thereof with carbon black; anda processing aid selected from the group consisting of:(a) about one to about 20 parts by weight of a fatty acid ester of a hydrogenated or non-hydrogenated C.sub.5 or C.sub.6 sugar;(b) about one to about 20 parts by weight of a polyoxyethylene derivative of a fatty acid ester of a hydrogenated or non-hydrogenated C.sub.5 or C.sub.6 sugar; and(c) mixtures thereof.