Patent ID: 8338344

Claim:
A method for improving the cold flow properties of fuel oils and lubricants, which comprises additizing a fuel oil or a lubricant with an effective amount of (B) a polymer B which is formed from monomers comprising at least one monomer of the formula M1, at least one monomer of the formula M2, and at least two monomers of the formula M3: in which R 1 is H or C 1 -C 40 -alkyl; R 2 , R 3 and R 4 are each independently H or C 1 -C 4 -alkyl; R 5 is C 1 -C 20 -alkyl; R 6 , R 7 and R 8 are each independently H or C 1 -C 4 -alkyl; R 9 is C 4 -C 20 -alkyl in the first monomer M3 and is C 9 -C 20 -alkyl in the second and in each further monomer M3, where the R 9 radicals in the different monomers M3 are different; wherein R 9 in at least one monomer M3 is a branched alkyl radical and the molar ratio of monomers M3 with a branched alkyl R 9 radical to monomers M3 with a linear alkyl R 9 radical is from 1:5 to 1:0.