Process for production of polyisobutenylsuccinic anhydrides without formation of resins
US5739355A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1996 |
| Grant date | Apr 14, 1998 |
| Priority date | — |
| Expiry date | Feb 14, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/32
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An alkenyl anhydride or polyalkenylsuccinic anhydride is prepared without forming resins, by an ene-synthesis reaction between an olefin or a polyolefin and a maleic anhydride, optionally substituted by one or two methyl groups, in an aromatic solvent that is selected from toluene and xylenes, whereby said anhydride is used at a ratio of 30 to 60% by weight relative to the reaction medium. More particularly, polyisobutenylsuccinic anhydrides which can be used to form, by reaction with polyethylene polyamines, compositions that contain polyisobutenylsuccinimides, used as detergent additives for motor fuels or as ashless dispersants for motor oils, are produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.