Patent ID: 6623536
Filing Date: 2003-09-23
Classification: C10L

Abstract:
A multifunctional additive composition for the cold operability of middle distillates resulting from the reaction of carboxylic compounds with amine compounds, characterized in that it contains at least 50% by weight of a mixture consisting of:a) 10% to 90% by weight of an additive (AB) which is the reaction product of at least one carboxylic compound (A) selected from the group consisting of alkylmaleic and alkenylmaleic anhydrides and alkylsuccinic and alkenylsuccinic anhydrides containing from 4 to 32 carbon atoms in the alkyl and alkenyl radicals, the corresponding acids and esters with at least one polyalkylamine compound (B) of the formula (I): NH2â€”[(CH2)nâ€”NHâ€”]mâ€”Hâ€ƒâ€ƒ(I) â€ƒin which n is an integer ranging from 2 to 4 and m is an integer ranging from 1 to 4, the molar ratio A/B being between 1m+1â€ƒand m+1, and b) 90% to 10% by weight of an additive (CD) which is the reaction product of: i) of at least one copolymer (C) resulting from the reaction of at least one first unsaturated carboxylic acid which may be unsubstituted or substituted with at least one alkyl ester of at least one second substituted or unsubstituted unsaturated carboxylic acid, which may be identical to or different from the first, of the formula (II): â€ƒin which R1 and R2, which may be identical or different, are selected from the group consisting of hydrogen and linear or branched alkyl groups containing from 1 to 20 carbon atoms, R3 is hydrogen or a linear alkyl group of not more than 3 carbon atoms and R4 is hydrogen or an alkyl group containing from 1 to 25 carbon atoms, ii) with an N-alkylpolyalkylenepolyamine (D) of the formula (III): R5â€”NHâ€”[â€”(CH2)pâ€”NHâ€”]qâ€”Hâ€ƒâ€ƒ(III) â€ƒin which R5 is a saturated aliphatic radical comprising from 12 to 22 carbon atoms, p is an integer ranging between 2 and 4 and q is an integer ranging between 1 and 4, the molar ratio C/D ranging between 1q+1â€ƒand q+1.