Patent ID: 6652610
Filing Date: 2003-11-25
Classification: C10L

Abstract:
A method for the simultaneous improvement of the lubricating activity and cold flow properties for improving cold-flow and lubricating properties of a fuel oil, said method comprising adding to the fuel oil an additive under cold blending conditions wherein the temperature of the fuel oil is less than 40Â° C., wherein the additive comprisesA) 5-95% by weight of at least one oil-soluble amphiphile of the formula 1â€ƒin which R1 is an alkyl, alkenyl, hydroxyalkyl or aromatic radical having 12-35 carbon atoms, X is NH, NR3, O or S, y is 1, 2, 3 or 4, R2 is hydrogen or an alkyl radical carrying hydroxyl groups and having 2 to 10 carbon atoms and R3 is an alkyl radical carrying nitrogen and/or hydroxyl groups and having 2 to 10 carbon atoms or C1-C20-alkyl, and B) 5 to 95% by weight of a terpolymer containing from 3 to 18 mol % of structural units derived from the vinyl ester of a carboxylic acid having 2 to 4 carbon atoms, from 0.5 to 10 mol % of structural units derived from the vinyl ester of a neocarboxylic acid having 8 to 15 carbon atoms, and structural units of ethylene to 100 mol %, and having a melt viscosity, measured at 140Â° C., of from 20 to 10,000 mPas.