Basf Se Corporation

Ansgar Eisenbeis

Irene Troetsch-Schaller

Frank-Olaf Maehling

Wolfgang Ahlers

Andreas Fechtenkoetter

Ulrich Annen

The use is described of polymers which contain, in copolymerized form, an &#x3b1;-olefin, a vinyl ester and an ester of an &#x3b1;,&#x3b2;-unsaturated carboxylic acid as an additive for fuel oils and lubricants and in particular as a cold flow improver in fuel oils. In addition, the fuel oils and lubricants additized with these polymers; and also additive packages comprising such polymers are described.

Fuel oil compositions with improved cold flow properties

Provided is a mixture containing: (a) a polar oil-soluble nitrogen compounds which is capable of sufficiently dispersing paraffin crystals precipitated out under cold conditions in a fuel and is a reaction product formed from reacting a poly(C- to C-carboxylic acid), which has at least one tertiary amino group, with a primary or secondary amine; (b) an oil-soluble acid amide reaction product formed from reacting a polyamide, which has from 2 to 1000 carbon atoms, with a C- to C-fatty acid or fatty acid-like compound, which has a free carboxyl group; and (c) an oil-soluble reaction product formed from reacting an &#x3b1;,&#x3b2;-dicarboxylic acid, which has from 4 to 300 carbon atoms, or a derivatives thereof, with a primary alkylamine, wherein the sum of components (a) to (c) constitute 100 wt. % of the mixture. The mixture is suitable as a paraffin dispersant in fuels, especially those having a biodiesel content.

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Weisenheim am Berg, Germany

Ansgar Eisenbeis