| 摘要 |
A process for the preparation of 2-benzothiazolesulphinamides of the general formula: <IMAGE> (I) in which R and R' represent alkyl groups containing 1 to 6 carbon atoms, cyanoethyl or cycloalkyl groups containing 5 to 7 carbon atoms or -NRR' is piperidino, hexamethyleneimino, morpholino, or 2,6-dimethylmorpholino which comprises oxidizing with an alkali metal hypochlorite, at a temperature below 30 DEG C. an aqueous suspension of a sulphenamide of the formula: <IMAGE> (II) in which R and R' have the same significance as in formula (I) in the presence of a sufficient amount of an alkaline agent selected from sodium carbonate, sodium bicarbonate, potassium carbonate, potassium bicarbonate and mixtures thereof so as to maintain the pH at 9 to 10, and as novel compounds useful as vulcanization accelerators for natural or synthetic rubber 2-piperidino-sulphinyl-, 2-N,N-bis(-62 -cyanoethyl)aminosulphinyl-, 2',6'-dimethyl-2-morpholinosulphinyl- and 2-N-hexamethyleneiminosulphinyl-benzothiazoles.
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