| abstract |
The invention relates to an improved rubber seal ring which is prepared from the following raw materials in parts by weight: 50-70 parts of ethylene propylene diene monomer, 3-8 parts of an accelerant, 13-18 parts of naphthenic oil, 8-14 parts of 1, 2-polybutadiene, 5-8 parts of dipentamethylenethiuram tetrasulfide, 10-20 parts of carbon black, 4-6 parts of a vulcanization accelerator, 1-3 parts of a crosslinking agent and 2-4 parts of trioctyl trimellitate. The improved rubber seal ring provided by the invention has the beneficial effects that the improved rubber seal ring provided by the invention is remarkably enhanced in heat resistance and further has good electric insulativity. |