Lubricant composition
US4376711A · kind A · utility
23Cited by
15References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 15, 1978 |
| Grant date | Mar 15, 1983 |
| Priority date | — |
| Expiry date | Sep 15, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2010/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An additive combination comprising a hydroxysubstituted ester of a polycarboxylic acid and a metal dihydrocarbyl dithiophosphate and lubricating compositions comprising the same. The lubricating compositions comprising these additives exhibit improved anti-friction and anti-wear properties. Best results are achieved when the ester is obtained from a dimer acid and particularly a dimer of a fatty acid containing conjugated unsaturation. The metal used in the metal dialkyl dithiophosphate must be one having a relatively soft metal oxide and particularly a metal oxide having a Mohs hardness of about 3 or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.