Patent ID: 8080603

Claim:
A curable elastomer composition for curing into a cured elastomer composition, the curable elastomer composition comprising: an essentially unsaturated rubber elastomer; between 0.5 and 25 parts by weight per hundred parts by weight of the rubber elastomer (phr) of a metal salt of a carboxylic acid; an effective amount of a peroxide curing agent for curing the elastomer composition; and between 0.1 and 10 phr of an anhydride multifunctional curing coagent that decreases the hysteresis of the cured elastomer composition as compared to the cured elastomer composition lacking the multifunctional curing coagent, wherein the hysteresis is measured using a rotorless shear rheometer as a loss tangent at 150° C., 41.85% strain and 10 Hz.