| abstract |
A vulcanizable composition comprises sulfur-vulcanizable rubber, sulfur or a sulfur-donor, a zinc compound, and a sulfur-containing amine of the formula n n R.sup.1 --S.sub.n --R--NR.sup.2 R.sup.3 n n wherein R is a divalent radical comprising a chain of at least 2 C atoms, R 1 is an organic radical, and R 2 and R 3 are each H or an organic radical, provided that NR 2 R 3 is not NH(C 1-6 alkyl), and n is an integer, or a salt thereof, provided that the amine is not 3-(methylthio)propylamine. The amine is preferably cystamine. |