Patent ID: 8100988

Claim:
Combustible, fuel and/or fuel oil, containing a major part of a hydrocarbon base comprising petrols, middle distillates, synthetic fuels, animal or vegetable oils, and their mixtures, and a minor part, from 50 to 1000 ppm, of at least one multifunctional additive enabling fuels to be operable in cold conditions, this additive comprising copolymers of at least one dicarboxylic compound with at least one olefin, having formula (III): wherein R 1 and R 2 are radicals comprising dodecyl and octadecyl radicals; R′ 1 and R′ 2 are identical or different, and comprise: alkyl radicals containing from 12 to 18 carbon atoms, alkyl- and N-alkyl-polyalkylene-polyamines of formula (II); hydroxylated amines selected from the group consisting of diethanolamine, monoethanolamine, N-decylethanolamine, N-dodecylethanolamine, and their alkoxylated derivatives; or N-alkylpolyalkylene-amines of formula (II): wherein R′ 3 and R′ 4 , are identical or different, and are hydrogen or a linear or branched alkyl group containing from 1 to 22 carbon atoms, and x, y and z are whole numbers, x varying between 1 and 6 and y and z varying between 0 and 6, and R 3 comprises an alkyl group containing from 1 to 30 carbon atoms, and the copolymer of formula (III) containing from 45 to 65 mole % of at least one olefin unit and from 55 to 35 mole % of at least one dicarboxylic unit.