Nitrogen- and sulfur-containing lubricant additive compositions of improved compatibility
US4140643A · kind A · utility
23Cited by
13References
20Claims
0Family size
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Inventor
Key dates
| Filing date | Jun 3, 1977 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Jun 3, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Nitrogen- and sulfur-containing compositions are prepared by reacting an oil-soluble dispersant with a dimercaptothiadiazole such as 2,5-dimercapto-1,3,4-thiadiazole and subsequently reacting the intermediate thus formed with a carboxylic acid or anhydride containing up to about 10 carbon atoms and having at least one olefinic bond. The preferred carboxylic acid or anhydride is maleic anhydride. The compositions thus obtained are useful in lubricants as dispersants, extreme pressure agents, corrosion inhibitors and inhibitors of copper activity and "lead paint" deposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.