Lubricant compositions stabilized with multiple antioxidants
US7704931B2 · kind B2 · utility
5Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 3, 2005 |
| Grant date | Apr 27, 2010 |
| Priority date | — |
| Expiry date | Nov 22, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2030/10
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition is disclosed that comprises lubricating oil and a mixture of at least two antioxidants, the first antioxidant being a secondary diarylamine and the second antioxidant being a substituted para-phenylenediamine. Also disclosed is a method of increasing the oxidation stability of a lubricating oil comprising adding thereto at least two antioxidants, the first antioxidant being a secondary diarylamine and the second antioxidant being a substituted para-phenylenediamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.