Colloidal thio-phosphorous products derived from colloidal lime, their preparation and uses
US5985805A · kind A · utility
0Cited by
5References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1997 |
| Grant date | Nov 16, 1999 |
| Priority date | — |
| Expiry date | Nov 6, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10M159/22
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel colloidal calcium thio-phosphorous products are described which can be obtained by a process comprising adding at least one phosphorus sulphide to colloidal lime in the presence of solvent, then heating the mixture, with stirring, then eliminating the solvent. These products can be used as anti-wear and extreme pressure additives in lubricating oils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.