Effective antioxidant combination for oxidation and deposit control in crankcase lubricants
US6599865B1 · kind B1 · utility
29Cited by
33References
80Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2002 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Jul 12, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/42
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
It has unexpectedly been found that the combination of (1) an alkylated diphenylamine, (2) a sulfurized olefin/fatty oil and/or an ashless dialkyldithiocarbamate, and (3) an alkylated phenothiazine, is highly effective at controlling crankcase lubricant oxidation and deposit formation. The present invention includes lubricating compositions, lubricating additives, and methods for improving the antioxidancy and/or deposit formation properties of a lubricating composition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.