Additives to lubricating oils having extreme pressure, antiwear and antioxidant effects, process for preparation thereof and lubricating compositions containing said additives
US5021175A · kind A · utility
1Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1990 |
| Grant date | Jun 4, 1991 |
| Priority date | — |
| Expiry date | Oct 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M2223/047
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Lubricating oil additives are provided which have extreme pressure, antiwear and antioxidant properties. The additives are dithiophosphorous disymmetric bisulphides of the formula: ##STR1## wherein X and Y represent an oxygen or sulphur atom or a methylene group and R.sub.1 and R.sub.2 and R.sub.3 represent a hydrocarbon radical, a polyether, a polythioether or a hydrogen atom. The invention also relates to a process for their preparation and to lubricating compositions containing the additives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.