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.
一种制备一般式为:##STR1## 其中R和R'代表含有1至6个碳原子的烷基基团、含有5至7个碳原子的氰乙基或环烷基基团或-NRR'为哌啶基、己亚胺基、吗啉基或2,6-二甲基吗啉基的2-苯并噻唑磺胺的方法,包括在低于30摄氏度的温度下,用一种碱性金属次氯酸盐氧化,将一种一般式为:##STR2## 其中R和R'的含义与式(I)中相同,在存在足够量的碱性试剂(选自碳酸钠、碳酸氢钠、碳酸钾、碳酸氢钾及其混合物)的情况下,悬浮在水中,以维持pH值在9至10之间,并作为新颖化合物,用作天然或合成橡胶硫化促进剂的2-哌啶基-磺胺基、2-N,N-双(-62-氰乙基)氨基磺胺基、2',6'-二甲基-2-吗啉磺胺基和2-N-己亚胺基-磺胺基苯并噻唑。