Patent ID: 6946526

Claim:
A vulcanizable composition comprising: (i) a nitrile polymer; (ii) a filler; (iii) a metal salt of a secondary amine, wherein the metal is selected from groups 1 and 2 of the periodic system of the elements according to IUPAC 1985, wherein the secondary amine is 4,4′-bis-α,α-dimethylbenzyl-diphenylamine, octylated diphenyl amine, styrenated diphenyl amine, 2,4-bis-(n-octylthio)-6-(4-hydroxy-3,5-di-t-butylanilino)-1,3,5-triazine, butylated/octylated diphenylamine, or 2,2,4-trimethyl-1,2-dihydroquinoline polymer; (iv) a vulcanization system; and (v) optionally an additive selected from the group consisting of a strong base, a salt of strong base and a weak acid, a salt of a weak acid, a carbodiimide, a polycarbodiimide and mixtures thereof.