Patent ID: 7476264

Claim:
A fuel oil composition comprising a fuel oil of animal or vegetable origin and an additive comprising A) at least one copolymer of ethylene and 8-21 mol % of at least one acrylic or vinyl ester having a C 1 -C 18 -alkyl radical and B) at least one comb polymer containing structural units derived from monomers having C 8 -C 16 -alkyl radicals, the monomers being selected from the group consisting of C 8 -C 16 -alkyl (meth)acrylates, C 8 -C 16 -alkyl vinyl esters, C 8 -C 16 -alkyl vinyl ethers, C 8 -C 16 -alkyl (meth)acrylamides, C 8 -C 16 -alkyl allyl ethers, C 8 -C 16 -diketenes and mixtures thereof, where the sum R R = m 1 · ∑ i ⁢ w 1 ⁢ i · n 1 ⁢ i + m 2 · ∑ j ⁢ w 2 ⁢ j · n 2 ⁢ j + … + m g · ∑ p ⁢ w gp · n gp is the molar average of carbon chain length distributions in the alkyl radicals of the monomers of B) and R is from 11.0 to 14.0, where m 1 , m 2 , . . . m g are the molar fractions of the monomers of B) in the comb polymer and the sum of the molar fractions m 1 to m g =1, w 1i , w 1j . . . w 2i , w 2j . . . w gp are the proportions by weight of individual carbon chain lengths i, j, . . . p of said alkyl radicals of the monomers of B) 1 to g, and n 1i , n 1j . . . n 2i , n 2j . . . n gp are the carbon chain lengths of said alkyl radicals i, j, . . . p of the monomers of B) 1 to g.