Patent ID: 7202307

Claim:
A sulfur curing EPDM composition comprising: 100 parts by weight of EPDM; zinc; and a vulcanization accelerator including sulfenamide type, thiazole type and dithiocarbamate type accelerators in an amount effective for vulcanizing the composition up to less than 2.0 parts by weight per the 100 parts by weight of EPDM; the sulfenamide type, thiazole type and dithiocarbamate type accelerators being combined together and compounded into the EPDM, wherein the thiazole type and sulfenamide type accelerators are contained in a combined amount up to 1.3 parts by weight per the 100 parts by weight of EPDM, and wherein a ratio of the thiazole type and sulfenamide type accelerators to the dithiocarbamate type accelerator is in a range from 1:0.05 to 1:0.5.