Chlorine-free silver protective lubricant composition (I)
US4948523A · kind A · utility
17Cited by
17References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1987 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Sep 30, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricating composition, preferably essentially free of zinc dihydrocarbyldithiophosphate compounds, and optionally free of chlorine containing silver lubricity agents, comprising a major proportion of an oil of lubricating viscosity and a minor amount of a silver protective agent comprising the reaction product of a C.sub.5 to C.sub.60 carboxylic acid and at least one amine selected from the group consisting of (1) guanidine, urea, and thioruea compounds; (2) C.sub.1 to C.sub.20 hydrocarbyl or hydroxy-substituted hydrocarbyl mono-amines, alkylene diamines, and (3) polyalkylene polyamines; and N-alkyl glycine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.