IMPROVED NITRILE POLYMER VULCANIZATE AND PROCESS FOR THE PRODUCTION THEROF

摘要

A nitrite polymer vulcanizate having improved hot air aging characteristics is described. The nitrite polymer vulcanizate may be produced admixing a composition comprising: (i) a nitrite polymer; (ii) a filler; (iii) a metal salt of a secondary amine; (iv) a vulcanization system; and optionally (v) an additive selected from the gro up comprising: a strong base, a salt of a strong base and a weak acid, a salt o f a weak acid, a carbodiimide, a polycarbodiimide and mixtures thereof. A vulcanizable composition useful for producing such a vulcanizate and a method for improving the hot a ir aging characteristics of a nitrite polymer are also described.