Patent ID: 7500996

Claim:
A fuel oil composition, consisting of a fuel oil of animal or vegetable origin and an additive comprising: A) a copolymer of ethylene and 8 to 21 mol % of at least one comonomer of acrylic or vinyl ester having a C 1 -C 18 -alkyl radical and B) a comb polymer containing structural units of B1) at least one olefin as monomer 1, which bears at least one C 8 -C 18 -alkyl radical on the olefinic double bond, and B2) at least one ethylenically unsaturated dicarboxylic acid as monomer 2, which bears at least one C 8 -C 16 -alkyl radical bonded via an amide moiety or imide moiety or a mixture thereof, wherein the sum Q Q = ∑ i ⁢ w 1 ⁢ i · n 1 ⁢ i + ∑ j ⁢ w 2 ⁢ j · n 2 ⁢ j of the molar averages of the carbon chain length distributions in the alkyl radicals of monomer 1 and the alkyl radicals of the amide and/or imide groups of monomer 2 is from 23 to 27, where w 1 is the molar proportion of the individual chain lengths in the alkyl radicals of monomer 1, w 2 is the molar proportion of the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2, n 1 are the individual chain lengths in the alkyl radicals of monomer 1, n 2 are the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2, i is the serial variable for the individual chain lengths in the alkyl radicals of monomer 1, and j is the serial variable for the individual chain lengths in the alkyl radicals of the amide and/or imide groups of monomer 2.