Use as Lubricating additives having EP, antiwear and antioxidant properties, process for preparing same and lubricant compositions containing said additives.

摘要

This invention relates to the use, as additives to lubricating oils, with extreme pressure, antiwear and antioxidant properties, of unsymmetrical thiophosphorous disulphides of general formula: …IMAGE… where X and Y denote an oxygen or sulphur atom or a methylene group and R1, R2 and R3 denote a hydrocarbon radical, a polyether, a polythioether or a hydrogen atom. …??A process of preparation using phase transfer catalysis is also described.