| 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. |
