橡胶硫化促进剂CBS的双氧水氧化法合成

Oxidation process for synthesis of rubber vulcanization accelerator CBS with hydrogen peroxide

以二巯基苯骈噻唑(促进剂M)、环己胺为原料,水作溶剂,在不使用强酸、强碱及其他催化剂的条件下,采用双氧水作氧化剂合成了N-环己基-2-苯骈噻唑次磺酰胺(CBS)。并通过正交实验对其合成工艺进行了优化。结果表明,CBS的最佳合成工艺条件为:n(促进剂M)/n(环己胺)为1.0∶3.0,n(促进剂M)/n(H2O2)为1.0∶1.9,n(环己胺)/n(溶剂水)为1∶55,反应温度为55℃;在此条件下,合成的CBS收率为95.28%,熔点为99.0℃,灰分为0.04%,挥发分为0.07%,其质量达到了国内企业行业标准HG 2096—91优级品指标。

N-cyclohexy-2-beozothiazole sulfenamide(rubber vulcanization accelerator CBS)was prepared by oxidation process with 2-mercapcto benzothiazol(accelerator M) and cyclohexylamine as raw materials,hydrogen peroxide(H2O2) as oxidant,water as solvent,without strong acid,alkali and other catalyst.The synthesis process for CBS was optimized through orthogonal experiments.The results showed that the optimal synthesis conditions were:molar ratio of accelerator M to cyclohexylamine 1.0∶3.0,molar ratio of accelerator M...