Patent ID: 6458174
Filing Date: 2002-10-01
Classification: C08F,C08L,C10L

Abstract:
A copolymer for use as an additive to fuel oil to improve the cold-flow properties of the fuel oil, the copolymer containingA) from 45 to 54 mol % of divalent structural units of the formula 1in which a and b=0 or 1 and a+b=1,B) from 35 to 53 mol % of divalent structural units of the formula 2 derived from a linear &agr;-olefin â€”H2Câ€”CHR2â€”â€ƒâ€ƒ(2) andC) from 1 to 25 mol % of divalent structural units derived from polyolefins, where the polyolefins can be derived from monoolefins having 3 to 5 carbon atoms, wherein a) R1 is an alkyl or alkenyl radical having 10 to 40 carbon atoms or an alkoxyalkyl radical having 1 to 100 alkoxy units and 1 to 30 carbon atoms in the alkyl radical, and b) R2 is an alkyl radical having 10 to 50 carbon atoms, c) the polyfins on which the structural units C) are based have an alkylvinylidene content of at least 50 mol %, and d) the number of carbon atoms in the polyfin molecules on which the structural units C) are based is from 35 to 350.