| abstract |
(57) [Summary] [Structure] (a) Peroxide vulcanizable fluorine-containing elastomer, (b) organic peroxide, (c) polyfunctional co-crosslinking agent, (d) 1 or 2 tert- A fluorine-containing elastomer vulcanizing composition comprising a phenolic antioxidant containing 1 to 4 hydroxyphenyl groups having a butyl group in one molecule. [Effect] The heat aging resistance and sealing characteristics at high temperature, which were the drawbacks of the conventional fluorine-containing elastomer vulcanizable composition capable of peroxide vulcanization, have been significantly improved, and the sealing properties such as O-rings can be maintained for a long time. Therefore, the product life is significantly extended and the industrial value is extremely high. |