Homogeneous compositions prepared from dimercaptothiadiazoles
US4136043A · kind A · utility
56Cited by
9References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 1974 |
| Grant date | Jan 23, 1979 |
| Priority date | — |
| Expiry date | May 16, 1994 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Compositions which form homogeneous blends with lubricating oils and the like are produced by preparing a mixture of an oil-soluble dispersant (preferably a substantially neutral or acidic carboxylic dispersant) and a dimercaptothiadiazole, preferably 2,5-dimercapto-1,3,4-thiadiazole, usually with a diluent, especially a lubricant base liquid, and heating said mixture above about 100.degree. C. The compositions often contain dimercaptothiadiazole moieties in amounts substantially greater than stoichiometric. They are useful for suppression of copper activity and "lead paint" deposition in lubricants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.