Lubricant compositions containing a functionalized dispersant
US8927469B2 · kind B2 · utility
8Cited by
47References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2012 |
| Grant date | Jan 6, 2015 |
| Priority date | — |
| Expiry date | Aug 15, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/25
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An engine lubricant composition, a method for maintaining the soot or sludge handling capability of an engine lubricant while not adversely affecting elastomeric seal material in the engine and a method of operating an engine. The engine lubricant includes a base oil and a dispersant. The dispersant is a reaction product of A) a hydrocarbyl-dicarboxylic acid or anhydride, B) a polyamine, C) a dicarboxyl-containing fused aromatic compound, and D) a non-aromatic dicarboxylic acid or anhydride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.