Copolymers with nitrogen groups, useful as additives for decreasing the cloud point of hydrocarbon middle distillates and compositions containing them
US4511369A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 9, 1983 |
| Grant date | Apr 16, 1985 |
| Priority date | — |
| Expiry date | Nov 9, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Copolymers with nitrogen groups are used as additives to lower the cloud point of middle distillates such as gas oils. They are obtained by reacting a compound having a primary amine group with a copolymer comprising from 20 to 40% of recurrent units from a linear .alpha.-olefin, from 30 to 70% of recurrent units from an .alpha.,.beta.-unsaturated dicarboxylic compound, from 5 to 30% of recurrent units from an alkyl ester of unsaturated monocarboxylic acid, and from 5 to 15% of recurrent units from styrene or a styrene derivative. These additives also improve the limit filterability temperature and the pour point of the middle distillates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.