Lubricating composition containing non-acidic phosphorus compounds
US7919440B2 · kind B2 · utility
3Cited by
17References
8Claims
0Family size
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Key dates
| Filing date | May 4, 2005 |
| Grant date | Apr 5, 2011 |
| Priority date | — |
| Expiry date | Aug 8, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricating composition with improved storage stability comprising a major amount of an oil of lubricating viscosity, at least one alkali metal borate, at least one polysulfide mixture having at least 40% dihydrocarbyl tetrasulfide or higher sulfides, and at least one non-acidic phosphorus compound comprised of a trihydrocarbyl phosphate and a dihydrocarbyl dithiophosphate derivative is disclosed. In addition to improved storage stability, the composition has improved wear performance when the ratio of polysulfides is controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.