Patent ID: 7081502

Claim:
A compound comprising: a. at least one elastomeric polymer having an average molecular weight M n of more than 20,000 g/mol and less than 15 wt. % of solid matter insoluble in boiling cyolohexane under reflux for 60 mm comprising repeating units derived from at least one C 4 to C 7 isomonoolefin monomer, at least one multiolefin cross-linking agent and at least one chain transfer agent, b. at least one filler and c. a peroxide curing system, wherein the elastometic polymer does not comprise a conjugated diene or a C 4 to C 14 multiolefin monomer, and wherein the chain transfer agent has a transfer coefficient of at least 10 and is 1-methylcycloheptene, 1-methyl-1-cyclopentene, 2-ethyl-1-hexene, 2,4,4-trimethyl-1-pentene, indene or a mixture thereof.