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Abstract

A rubber composition containing (A) a bismaleimide compound represented by the general formula (I) ##STR1## wherein R is a divalent acyclic aliphatic group, cyclic aliphatic group, aromatic group, or alkylaromatic group, these groups optionally containing a hetero atom selected from O, N and S in their chain or side substituent, (B) a sulfenamide compound represented by the general formula (II) ##STR2## wherein R.sub.1 and R.sub.2 denote independently from each other a hydrogen atom, an acyclic aliphatic group, or cyclic aliphatic group, or R.sub.1 and R.sub.2 together denote a chain aliphatic group which optionally contains an oxygen atom, provided that R.sub.1 and R.sub.2 cannot simultaneously denote a hydrogen atom, (C) a dithiophosphoric acid compound represented by the general formula (III) ##STR3## wherein R.sub.3 and R.sub.4 denote each an aliphatic group, and (D) sulfur; or (A) a bismaleimide compound represented by the general formula (I) defined above, (E) an aromatic carboxylic acid anhydride, (F) sulfur and/or a sulfur donor, and (G) volcanization accelerators.

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