Antiwear system for improved copper corrosion
US11884892B1 · kind B1 · utility
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47References
27Claims
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Key dates
| Filing date | Mar 31, 2023 |
| Grant date | Jan 30, 2024 |
| Priority date | — |
| Expiry date | Mar 31, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An organometallic phosphorus-providing antiwear additive and a lubricating composition including the organometallic phosphorus-providing antiwear additive having improved copper corrosion performance obtained by reacting an organic hydroxy compound with phosphorus pentasulfide to form a reaction product, distilling the reaction product and recovering a condensate, and neutralizing the condensate with a basic or neutral metal compound including one or more of a metal oxide, a metal hydroxide, or a metal carbonate to form the organometallic phosphorus-providing antiwear additive or salt thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.