Patent ID: 8628590
Filing Date: 2014-01-14
Classification: C10L

Abstract:
1. A method for improving the response behavior of a mineral oil cold flow improver C) in middle distillates which comprise at least one ashless nitrogen-containing detergent additive A), wherein A) is an oil-soluble amphiphilic compound which comprises at least one alkyl or alkenyl radical which is bonded to a polar group, wherein the alkyl or alkenyl radical comprises 10 to 500 carbon atoms and the polar group comprises 2 or more nitrogen atoms, comprising the step of nucleating a paraffin crystallization with at least one oil-soluble olefin copolymer B) which is a copolymer of ethylene and 3 to 40 mol % of olefins having 3 to 30 carbon atoms, wherein C) is copolymer of ethylene and 8 to 21 mol % of olefinically unsaturated compounds selected from the group consisting of vinyl esters, acrylic esters, methacrylic esters, alkyl vinyl ethers, alkenes, and mixtures thereof, wherein the olefinically unsaturated compounds may be substituted by hydroxyl groups and one or more of these comonomers may be present in the polymer, or C) is an oil-soluble polar nitrogen compound which is a reaction product of compounds of the formula NR 6 R 7 R 8 in which R 6 , R 7 and R 8 may be the same or different, and at least one of these groups is C 8 -C 36 -alkyl, C 6 -C 36 -cycloalkyl, C 8 -C 36 -alkenyl, and the remaining groups are either hydrogen, C 1 -C 36 -alkyl, C 2 -C 36 -alkenyl, cyclohexyl or a group of the formula -(A-O) x -E or —(CH 2 ) n —NYZ in which A is an ethyl or propyl group, x is from 1 to 50, E=H, C 1 -C 30 -alkyl, C 5 -C 12 -cycloalkyl or C 6 -C 30 -aryl, and n=2, 3 or 4, and Y and Z are each independently H, C 1 -C 30 -alkyl or -(A-O) x , with compounds which contain at least one acyl group and wherein C) is different than B).