Imides and bis-imides as friction modifiers in lubricants
US9006156B2 · kind B2 · utility
3Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2010 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Jun 1, 2032 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/045
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition is provided for use as a friction modifier for an automatic transmission, which comprises a condensation product of a hydroxypolycarbox-ylic acid, such as 2,3-di-hydroxybutanedioic acid or 2-hydroxybutanedioic acid, with an N,N-di(hydrocarbyl)alkylenediamine, where each hydrocarbyl group contains 1 to 22 carbon atoms, provided that the total number of carbon atoms in the two hydrocarbyl groups is at least about 9, and the alkylene group contains 2 to 4 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.