Lubricating compositions with improved antioxidancy comprising added copper, a molybdenum containing compound, aromatic amine and ZDDP
US5994277A · kind A · utility
22Cited by
12References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1996 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Apr 3, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B1/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Crankcase lubricant compositions for use in automobile or truck engines comprise a major amount of a lubricating oil, added copper present in oil-soluble form, at least 2 ppm of molybdenum present in oil-soluble form, and a total of from 0.05 to 2 mass % of one or more oil-soluble aromatic amines. The specified additives provide a highly effective antioxidant system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.