Patent ID: 6083287
Filing Date: 2000-07-04
Classification: C10L

Abstract:
A detergent and corrosion-inhibiting additive for engine fuels, comprising compounds having amide or imide functions resulting from the condensation of a compound C comprising a primary polyamine with a compound A comprising at least one polyalkenyl carboxylic, diacid or anhydride compound and a compound B comprising at least one straight-chain or branched carboxylic, monoacid or anhydride compound,wherein said additive is obtained by mixing from 60 to 90 wt % of compound A, containing from 2 to 20 carbon atoms per straight-chain or branched alkenyl group and having an average molecular weight ranging from 200 to 3000, from 0.1 to 10 wt % of compound B, and from 10 to 30 wt % of compound C represented by formula (I):H.sub.2 N--[--(CHR.sub.1 --(CH.sub.2).sub.p --CHR.sub.2).sub.p --NH].sub.m --Hwherein R.sub.1 and R.sub.2, identical or different, are hydrogen or a hydrocarbon group containing from 1 to 4 carbon atoms, n is an integral number ranging from 1 to 3, m is an integral number ranging from 1 to 10 and p is an integral number equal to 0 or 1,wherein the molar ratio A/B/C is 1/(0.1 to 1)/(1 to 3), wherein A/B/C is not 1/1/1,wherein the molar ratio C/A is from 1.3 to 2.0, and the molar ratio B/A is from 0.1 to 0.8.