Polymeric phosphorus esters for lubricant applications
US9074157B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Apr 21, 2010 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Oct 19, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/042
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A lubricant composition of an oil of lubricating viscosity and a polymeric phosphorus ester comprising the condensation product of a monomeric phosphorus acid or an ester thereof with a diol having two hydroxy groups separated by a chain of 4 to about 100 atoms exhibits good volatility, corrosion, wear, and/or seal performance in lubrication of a transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.