Esters of polyalkyl or polyalkenyl N-hydroxyalkyl succinimides and fuel compositions containing the same
US5993497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 1998 |
| Grant date | Nov 30, 1999 |
| Priority date | — |
| Expiry date | Aug 28, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L10/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Esters of polyalkyl or polyalkenyl N hydroxyalkyl succinimides having the formula: ##STR1## or a fuel soluble salt thereof; wherein R is a polyalkyl or polyalkenyl group having an average molecular weight in the range of about 450 to about 5,000; PA1 n is an integer from 2 to 5; and Z is a moiety selected from the group consisting of ##STR2## wherein R.sub.1 is a hydroxy, nitro, cyano or --(CH.sub.2).sub.x --NR.sub.3 R.sub.4, wherein R.sub.3 and R.sub.4 are independently hydrogen or lower alkyl of 1 to 6 carbon atoms and x is 0 or 1; and R.sub.2 is hydrogen, hydroxy, nitro, cyano or --(CH.sub.2).sub.y --NR.sub.5 R.sub.6, wherein R.sub.5 and R.sub.6 are independently hydrogen or lower alkyl of 1 to 6 carbon atoms and y is 0 or 1. The compounds of formula I are useful as fuel additives for the prevention and control of engine deposits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.