Patent ID: 7385008

Claim:
An abrasion resistant article comprising a composition of from 10 to 80 phr of a terpolymer of C 4 to C 7 isoolefin derived units, p-alkylstyrene derived units and p-bromomethylstyrene derived units; at least one filler; an elastomer selected from polyisoprene, natural rubber, polybutadiene and butadiene-acrylonitrile-styrene rubber; and from 0.1 to 3 phr of at least one thiourea selected from the group of structures represented by: wherein R 1 , R 2 , R 3 , and R 4 can be the same or different, and are radicals selected from hydrogen, methyl, ethyl, linear C 3 to C 20 alkyl, branched C 3 to C 20 alkyl, vinyl, linear C 3 to C 20 alkenyl, branched C 3 to C 20 alkenyl, substituted linear C 3 to C 20 alkyl, and substituted branched C 3 to C 20 alkyl; wherein the cured composition has a Tangent Delta at −30° C. and 0° of greater than 0.300 and a DIN Abrasion Index of greater than 100.