N-Substituted succinimides, their preparation and use as motor fuel additives
US4422856A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 13, 1981 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Feb 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/224
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
N-substituted succinimides are obtained by reacting in a first stage, maleic anhydride with an oxyalkylated or polyoxyalkylated monoalcohol of formula EQU R.sup.1 --O--A.sub.n OH wherein R.sup.1 is an aliphatic radical having from 12 to 25 carbon atoms, A is an alkylene radical having 2 to 4 carbon atoms and n is an integer from 1 to 50, and by further reacting the reaction product of the first stage either with a monoprimary amine of formula EQU R.sup.2 --X--Z.sub.m NH.sub.2 or a bi-primary amine of the formula EQU H.sub.2 N--Z--NH.sub.p H, wherein R.sup.2 is an aliphatic radical having from 8 to 25 carbon atoms, Z is an alkylene radical having from 2 to 4 carbon atoms, X is --NH-- or --O--, m is an integer from 0 to 4 and p an integer from 2 to 6. The resultant succinimides are useful as anti-rust and detergent additives for motor fuels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.