Preparation of phosphorus-containing antiwear compounds for use in lubricant compositions
US9550799B2 · kind B2 · utility
1Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Aug 23, 2011 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Aug 23, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process is provided for preparing a salt of a hydroxy-substituted ester of phosphoric acid, comprising: (a) reacting a phosphate diester with an alkylene oxide, (b) reacting the product mixture of step (a) with a phosphating agent; and (c) reacting the product mixture of step (b) with an amine; wherein the phosphate diester is reacted with the alkylene oxide of step (a) in the substantial absence of a phosphate monoester. The product is useful as an antiwear agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.