申请人:Ugine Kuhlmann
公开号:US04017506A1
公开(公告)日:1977-04-12
A process for the preparation of 2-benzothiazolesulphinamides of the general formula: ##STR1## 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.degree. C. an aqueous suspension of a sulphenamide of the formula: ##STR2## 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.
一种制备通式为:##STR1##其中R和R'表示含有1至6个碳原子的烷基、含有5至7个碳原子的氰乙基或环烷基,或-NRR'为哌啶基、己亚胺基、吗啉基或2,6-二甲基吗啉基的2-苯并噻唑磺酰胺的方法,包括在碱性试剂的足够量存在下,在维持pH值为9至10的情况下,将通式为:##STR2##其中R和R'的含义与公式(I)中相同的磺酰胺的水悬浮液在低于30℃的温度下与一种碱金属次氯酸盐进行氧化反应,以及作为天然或合成橡胶硫化促进剂有用的新化合物2-哌啶基磺酰基、2-N,N-双(-62-氰乙基)氨基磺酰基、2',6'-二甲基-2-吗啉基磺酰基和2-N-己亚胺基磺酰基苯并噻唑。