Patent ID: 8252870

Claim:
A curable chlorinated elastomer composition comprising: a chlorinated elastomer; and a cure system composition comprising; a polymercapto crosslinking agent; an inorganic base; and a combination of: (a) a nitrogen containing chelating agent, wherein said polymercapto crosslinking agent is a crosslinking agent selected from the group consisting of 2,5-dimercapto-1,3,4-thiadiazole and a derivative thereof; (b) a first accelerator, said first accelerator is an ammonium or phosphonium salt, wherein said ammonium or phosphonium salt having a formula selected from the group consisting of wherein Z is a nitrogen or phosphorous atom, R 1 to R 4 are independently alkyl or aryl groups containing between 2 and 8 carbon atoms, and the total number of carbon atoms on R 1 -R 4 is between 10 and 14, wherein R 5 and R 6 are alkyl groups containing between 1 and 8 carbon atoms, and the total number of carbon atoms on R 5 -R 6 is between 5 and 9; and wherein X is an anion; and (c) a second accelerator, said second accelerator is a quaternary ammonium salt having a formula selected from the group consisting of wherein R 1 is an alkyl or aryl group containing between 4 and 12 carbon atoms; wherein R 2 and R 3 is independently alkyl or aryl groups containing between 1 and 8 carbon atoms; wherein the total number of carbon atoms on R 2 and R 3 is between 3 and 9; wherein R 4 and R 5 are methyl groups, and R 6 is an alkyl group containing between 2 and 8 carbon atoms; and wherein X is an anion.