申请人:MONSANTO COMPANY
公开号:EP0399986A1
公开(公告)日:1990-11-28
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。