Lubricating composition with good oxidative stability and reduced deposit formation
US8227391B2 · kind B2 · utility
5Cited by
4References
11Claims
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Key dates
| Filing date | Oct 17, 2008 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Dec 1, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition that is particularly suited for use in steam and gas turbine oils and in circulating oils has a balance of excellent oxidative stability and reduced sludge formation and comprises a blended mixture of alkylated phenyl-α-naphthylamine and at least oil soluble triazole or triazole derivative in an oil of lubricating viscosity, such compositions being capable of a residual RPVOT of 25% after at least 500 hours test duration test duration 120° C. in Dry TOST test or, alternatively 50% after 700 hours or 25% after 1000 hours.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.