Importance

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Abstract

Rubber compositions and articles such as tire components made therefrom, such rubber compositions including between 70 phr and 100 phr of an epoxidized rubber component selected from an epoxidized polybutadiene rubber (eBR), an epoxidized styrene-butadiene rubber (eSBR), or combinations thereof. Such epoxidized rubber components may have a Tg of between −80° C. and −110° C. and an epoxy-function content of between 1 mol % and 25 mol %. The rubber compositions may further include between 30 phr and 150 phr of a plasticizing resin and at least 40 phr of a silica. A guanidine derivative is included in such rubber compositions in an amount of between 3% and 10% by weight relative to the weight of the silica. The guanidine derivative provides significant improvement to the dispersion of the silica in the rubber during mixing.

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First Claim