Nitrogen containing copolymers useful as additives for lowering the cloud point of hydrocarbon middle distillates and compositions containing them
US4731095A · kind A · utility
30Cited by
5References
27Claims
0Family size
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Key dates
| Filing date | Sep 16, 1985 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Sep 16, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10L1/2366
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Copolymers with nitrogen groups are used as additives to lower the cloud point and improve the filterability limit temperature and the pour point of middle distillates such as gas oils. They are obtained by reacting a compound having a primary amine group with a copolymer comprising 15 to 40% of recurrent units form a linear .alpha.-olefin, 20 to 70% of recurrent units form and .alpha.,.beta.-unsaturated dicarboxylic compound and 15 to 45% of recurrent units form an alkyl ester of unsaturated monocarboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.