New thiophosphoretted compounds, their preparation and their use as additives for lubricants
US5256319A · kind A · utility
1Cited by
18References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1991 |
| Grant date | Oct 26, 1993 |
| Priority date | — |
| Expiry date | Oct 23, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition of a thiophosphoretted additive obtained by reacting a sodium or a calcium sulfonate surbasified by sodium or calcium carbonate, showing 0.9 to 10 basic equivalents per kilogram, with a phosphorus sulfide used in such proportion that he ratio of molar phosphorus to the basic equivalent of the surbasified sulfonate ranges from 0.002 to 0.15; and contacting resultant reaction product of the surbasified sulfonate and the phosphorus sulfide with at least one active hydrogen compound which is water, an alcohol, a phenol, a carboxylic acid, an ester-acid, a mineral acid, a mineral base, an amine, an amide or a mercaptan.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.