Patent ID: 7319121

Claim:
A foamable thermoplastic elastomer composition prepared by the process comprising dynamically vulcanizing a) a cross-linkable hydrocarbon rubber in the presence of b) a thermoplastic polyolefin resin having a Tm greater than 120° C. wherein said composition comprises: a) 25 to 30 wt % of a partially or fully vulcanized reaction product of said cross-linkable hydrocarbon rubber with a cross-linking agent, said reaction product being present as a dispersed phase; b) 7 to 12 wt % of said thermoplastic resin as a continuous phase; and, c) 8-22 wt % of an elastomeric thermoplastic modifier comprising 1) 3-7 wt. % copolymers of propylene with one or more of ethylene and C 4 -C 10 alpha-olefins, said copolymers having a Tm greater than 20° C. and less than 120° C., and, 2) 3-15 wt. % hydrogenated, linear or branched triblock styrenic copolymers from styrene, isoprene and/or butadiene, wherein said wt. % amounts are based upon the total weight of the composition.