Fuel oils composed of middle distillates and oils of vegetable or animal origin and having improved cold flow properties

Abstract From the Canadian patent

The invention provides a fuel oil composition F) comprising F1) 89-50% by volume of a fuel oil of mineral origin and F2) 11-50% by volume of a fuel oil of vegetable and/or animal origin and, as a cold a dditive, the constituents A) at least one copolymer composed of ethylene and 8-21 mol% of at least one acrylic or vinyl ester having a C1-C18-alkyl radical and B) at least one comb polymer containing structural units composed of B1) at least one olefin as monomer 1 which bears at least one C8-C18-alkyl radical on the olefinic double bond and B2) at least one ethylenically unsaturated dicarboxylic acid as monomer 2 which bears at least one C8-C16-alkyl radical bonded via an ester moiety where …