Zwitterionic tertiary ammonium dithiocarbamates are provided by the reaction of carbon disulfide with a polyamine and can be utilized as either a primary or a secondary accelerator in a sulfur vulcanizable rubber composition. The polyamine contains at least one secondary and at least one tertiary amine with the reaction product containing a tertiary ammonium cation and the carbon disulfide becomes part of a N,N-dialiphatic dithiocarbamate anion which is covalently connected to said tertiary ammonium cation. Such compounds are readily prepared via a direct route by the reaction of the polyamine with carbon disulfide in the presence of a non-hydroxylic solvent or in a gas. The reaction product solid can be readily removed from the solvent as by filtration. When utilized as accelerators, the compounds of the present invention yield improved vulcanization parameters.
通过
二硫化碳与
多胺的反应,可提供聚
二硫化碳叔
铵二
硫代
氨基甲酸盐,并可用作
硫磺硫化橡胶组合物中的一级或二级
促进剂。聚胺含有至少一种仲胺和至少一种叔胺,反应产物含有叔
铵盐阳离子,
二硫化碳成为与上述叔
铵盐阳离子共价连接的 N,N-二脂肪族二
硫代
氨基甲酸酯阴离子的一部分。在非羟基溶剂存在下或在气体中,通过
多胺与
二硫化碳的反应,可以直接制备此类化合物。反应产物固体可以通过过滤很容易地从溶剂中去除。当用作
促进剂时,本发明的化合物可改善
硫化参数。