Abstract—

A method is proposed for the preparation of antiwear additives based on quaternary ammonium salts of dialkyldithiocarbamic acids by non-catalytic interaction of stoichiometric amounts of the corresponding diamine, carbon disulfide, and tetraalkylammonium chloride in the presence of sodium hydroxide in which the interaction of the initial components is carried out in one stage. All synthesized additives are highly soluble in polyorganosilicone oils, and at a concentration of 0.5–1.0 wt % they exhibit antiwear activity, which is expressed in a significant decrease (in some cases more than twice) in the diameter of the wear scar when tested on a four-ball friction machine. It has been shown that an increase in the length of alkyl groups in the anionic part of the additives leads to a more effective antiwear effect, the same trend manifests itself with an increase in the number of carbon atoms of alkyl groups in ammonium salts. The influence of the concentration of additives on the antiwear properties of lubricating compositions has been studied. The proposed type of additive is a promising friction modifier for silicone lubricants.

中文翻译：

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基于二烷基二硫代氨基甲酸季铵盐的新型有机硅润滑油抗磨添加剂

摘要——

提出了一种在氢氧化钠存在下，通过化学计量的相应二胺、二硫化碳和四烷基氯化铵的非催化相互作用来制备基于二烷基二硫代氨基甲酸季铵盐的抗磨添加剂的方法，其中初始相互作用组件在一个阶段中进行。所有合成的添加剂都高度溶于聚有机硅油，并且在 0.5-1.0 wt% 的浓度下，它们表现出抗磨损活性，这表现为在测试时磨痕直径显着减小（在某些情况下超过两倍）四球摩擦机。研究表明，添加剂阴离子部分烷基长度的增加可带来更有效的抗磨效果，随着铵盐中烷基碳原子数的增加，也表现出相同的趋势。已经研究了添加剂浓度对润滑组合物抗磨性能的影响。所提出的添加剂类型是一种很有前景的硅酮润滑剂摩擦改进剂。