| 摘要 |
A rubber composition comprising a base rubber, carbon black and a dinitrodiamine compound represented by the formula ¢I!, ¢ I ! wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R1 is hydrogen or an aliphatic, alicyclic or aromatic group, provided that two nitrogen atoms linking through X may further link through R1 when both X and R1 are the aliphatic groups, and R2 and R3 independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, provided that R2 and R3 may conjointly form a ring, is improved in its scorching without deterioration in its dynamic properties by incorporating thereto the following components (A) or (B); (A) N-(cyclohexylthio)phthalimide and a bismaleimide compound, or (B) 2,3,5,6-tetrachloro-1,4-benzoquinone.
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