Abstract: The present invention relates to a fuel oil additive comprising A) a copolymer of ethylene and from 18 to 35 mol % of at least one acrylic ester or vinyl ester having a C1-C18-alkyl radical and a degree of branching of less than 5 CH3/100 CH2 groups, and B) a comb polymer comprising structural units formed from 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 amide and/or imide group, in which the parameter Q Q = ? i ? ? w 1 ? i · n 1 ? i + ? j ? ? w 2 ? j · n 2 ? j in which w1 is the molar proportion of the individual chain lengths n, in the alkyl radicals of monomer 1, w2 is the molar proportion of the individual chain lengths n2 in the alkyl radicals of the amide and/or imide groups of monomer 2, n1 are the individual chain lengths in the alkyl radica

Abstract: The present invention relates to a fuel oil additive comprising A) a copolymer of ethylene and from 18 to 35 mol % of at least one acrylic ester or vinyl ester having a C1-C18-alkyl radical and a degree of branching of less than 5 CH3/100 CH2 groups, and B) a comb polymer comprising structural units formed from 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 group, in which the parameter Q Q = ? i ? ? w 1 ? i · n 1 ? i + ? j ? ? w 2 ? j · n 2 ? j in which w1 is the molar proportion of the individual chain lengths n1 in the alkyl radicals of monomer 1, w2 is the molar proportion of the individual chain lengths n2 in the alkyl radicals of the ester groups of monomer 2, n1 are the individual chain lengths in the alkyl radicals of monomer 1, n2 are the indiv

Abstract: The present invention relates to a fuel oil additive comprising A) a copolymer of ethylene and from 13 to 17 mol % of at least one acrylic ester or vinyl ester having a C1-C18-alkyl radical and a melt viscosity V140 of not more than 80 mPas, and B) a comb polymer comprising structural units formed from 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 amide and/or imide group, in which the parameter Q Q = ? i ? w 1 ? ? i · n 1 ? i + ? j ? w 2 ? j · n 2 ? j in which w1 is the molar proportion of the individual chain lengths n1 in the alkyl radicals of monomer 1, w2 is the molar proportion of the individual chain lengths n2 in the alkyl radicals of the amide and/or imide groups of monomer 2, n1 are the individual chain lengths in the alkyl radicals of monomer 1, n2 are

Abstract: The invention provides graft copolymers obtainable by grafting an ester (a) of a C8- to C22-alcohol and acrylic acid onto a copolymer (b) containing, in addition to ethylene, from 3.5 to 21 mol % of vinyl acetate and from 0.5 to 16 mol % of at least one vinyl ester of the formula 1 CH2?CH—OCOR1??(1) where R1 is C2- to C30-alkyl, with the proviso that the copolymer b) contains less than 0.5 mol % of alkenes having 3 to 30 carbon atoms.

Abstract: The invention provides graft copolymers obtainable by grafting an ester (a) of a C8- to C22-alcohol and acrylic acid onto a copolymer (b) containing, in addition to ethylene, from 0.5 to 16 mol % of at least one vinyl ester of the formula 1 CH2?CH—OCOR1??(1) where R1 is a branched C5- to C15-alkyl radical, with the proviso that the copolymer b) contains less than 3.5 mol % of vinyl acetate.

Abstract: The invention provides graft copolymers obtainable by grafting an ester (a) of a C8- to C22-alcohol and acrylic acid to a copolymer (b) which contains from 3.5 to 21 mol % of vinyl acetate in addition to ethylene, and for their use as cold additives in fuel oils.

Abstract: A fuel oil comprising: A) a mineral oil having a cloud point of less than ?8° C., a boiling range (90-20%) of less than 120° C. and a difference between CFPP and PP of less than 10° C., and B) one or more copolymers, wherein the copolymers comprise: a) bivalent structural unit (B1), wherein (B1) is a bivalent structural unit of formula (1) —CH2—CH2—??(1) and b) one or more bivalent structural units (B2), wherein (B2) is either a bivalent structural unit of formula (2) —CH2—CR1R2—??(2) ?in which R1 is hydrogen or methyl, R2 is COOR3, OR3 or OCOR3, and R3 is an alkyl radical having at least 4 and at most 30 carbon atoms, or (B2) is a bivalent structural unit of formula (2a) ?in which R3 is an alkyl radical having at least 4 and at most 30 carbon atoms.

Abstract: Copolymers containing A) from 45 to 54 mol % of divalent structural units of the formula 1 in 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 —H2C—CHR2—  (2) and C) 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 alkylvinylidene content of the polyolefins on which the structural units C) are based is at least 50 mol %, and d) the number of carbon atoms in the polyolefin molecules on which the structural units C) are based is from 35 to 350.

Abstract: Oil-soluble copolymers having an OH number of from 10 to 250 and a molecular weight of from 1000 to 100,000 g/mol, obtained from the reaction of a copolymer precursor which comprises structural units of A) from 5 to 95 mol-% of an olefinically unsaturated carboxylic acid or a derivative of such an acid, B) from 5 to 95 mol-% of an olefinically unsaturated compound having at least one hydrocarbon radical containing at least 6 carbon atoms, and, if desired, C) from 0 to 40 mol-% of further structural units selected from the group consisting of C1-C6-alkyl (meth)acrylates, C1-C6-alkyl vinyl esters and C2-C6-olefins, with a reagent, which must carry at least one OH group and which, apart from this OH group, has at least one further functional group which is capable of reacting with the carboxylic acid or the derivative of a carboxylic acid as in component A), where the residual acid number is set to a value below 50 mg of KOH/g of copolymer by addition of the reagent.

Abstract: A fuel oil comprising: