Multifunctional ashless detergent additives for fuels and lubricants
US5160649A · kind A · utility
12Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 1991 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | Oct 23, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2040/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ashless detergent additive having antioxidant and metal surface protection properties for lubricants or fuels is made from a Mannich condensation reaction between a hydrocarbylbissuccinimide, such as a dimer of a polyisobutenylsuccinimide (derived from tetraethylenepentamine), an aldehyde, such as formaldehyde, and a heteroatom substituted benzoic acid such as salicyclic acid, thiosalicyclic acid or aminosalicylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.