Antiwear system for improved copper corrosion
US12054688B1 · kind B1 · utility
0Cited by
47References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2023 |
| Grant date | Aug 6, 2024 |
| Priority date | — |
| Expiry date | Mar 31, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/08
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An oil-soluble phosphorus antiwear additive and a lubricating composition including the ashless 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 reacting the condensate with an unsaturated ester of a carboxylic acid to form an oil-soluble phosphorus antiwear additive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.