Abstract: The present invention relates to a fuel composition comprising at least one biodiesel fuel and comprising 0.05 to 5% by weight of at least one polymer comprising ester groups, which comprises repeat units derived from ester monomers having 16 to 40 carbon atoms in the alcohol radical, and repeat units derived from ester monomers having 7 to 15 carbon atoms in the alcohol radical, and the polymer comprising ester groups has a weight-average molecular weight in the range from 5000 to 100 000 g/mol. The present invention further describes the use of polymers comprising ester groups as flow improvers in fuel compositions which comprise at least one biodiesel fuel. Surprising advantages can be achieved especially with regard to the improvement of the cloud point and the low-temperature storability.

Abstract: The invention relates to comb polymers which comprise, in the main chain, repeating units which are derived from polyolefin-based macromonomers, and repeating units which are derived from low molecular monomers which are selected from the group consisting of styrene monomers having 8-17 carbon atoms, alkyl(meth)acrylates having 1-10 carbon atoms in the alcohol group, vinyl esters having 1-11 carbon atoms in the acyl group, vinyl ethers having 1-10 carbon atoms in the alcohol group, (Di)alkylfumarates having 1-10 carbon atoms in the alcohol group, (Di)alkylmaleates having 1-10 carbon atoms in the alcohol group and mixtures of said monomers. The molar branching degree lies in the region between 0.1-10 mol. % and the comb polymer represents the sum of at least 80 wt.

Abstract: The present invention relates to the use of ester group-including polymers having at least one nonpolar segment P and at least one polar segment D, where the polar segment D includes at least 8 repeating units, and the proportion of dispersing repeating units in the polar segment D is at least 30% by weight based on the weight of the polar segment D, as antifatigue additive in lubricants.

Abstract: The present invention relates to polymer dispersions comprising A) at least one dispersed polyolefin, B) at least one dispersion component, C) mineral oil and D) at least one glyceryl ester derived from an unsaturated carboxylic acid having from 8 to 30 carbon atoms. The inventive polymer dispersions are notable for very good low-temperature performance. In addition, the polymer dispersions can be prepared in a particularly energy-saving manner. The present invention further relates to processes for the preparation of and to the use of these polymer dispersions.

Abstract: The present invention concerns a method for the determination of the oxidative stability of a lubricating fluid, comprising the steps of: introducing a sample of the lubricating fluid under test in an reaction cell; introducing catalytic amounts of a catalyst to the reaction cell; heating the cell to the oxidation temperature of the lubricating fluid and maintaining this temperature; delivering oxygen containing gas at constant flow rate through the cell over the course of the reaction; delivering a gas comprising nitrogen dioxide at a constant flow rate through the cell for a specified time; applying and maintaining a specified vacuum on the reaction cell; allowing the mixture to react for a specified time; measuring the viscosity of the oxidized lubricating fluid. Additionally, the present invention describes an apparatus for the determination of the oxidative stability of a lubricating fluid.

Abstract: The present invention is directed to a lubricating oil composition, a diesel engine comprising a lubricating oil composition, and a method of lubricating a diesel engine provided with an exhaust gas recirculation system, comprising lubricating said engine with a lubricating oil composition comprising an oil of lubricating viscosity, and a polymeric N-dispersant booster comprising monomer units of: a) 0 to 40 wt. % of one or more ethylenically unsaturated ester compounds of formula (I) wherein R is equal to H or CH3, R1 represents a linear or branched alkyl group with 1 to 5 carbon atoms, R2 and R3 independently represent H or a group of the formula —COOR?, wherein R? is H or an alkyl group with 1 to 5 carbon atoms, b) 10 to 98 wt.

Abstract: The present invention describes a fuel oil composition comprising at least one biodiesel oil and at least one additive for improving the filterability.

Abstract: The present invention relates to the use of a polyalkylmethacrylate polymer to improve the air release of a functional fluid.

Abstract: Noise generation in a hydraulic system is reduced by contacting a hydraulic fluid comprising a polyalkyl(meth)acrylate polymer with a hydraulic system.

Abstract: The present invention relates to the use of comb polymers comprising, in the main chain, repeat units which are derived from polyolefin-based macromonomers, and repeat units which are derived from low molecular weight monomers selected from the group consisting of styrene monomers having 8 to 17 carbon atoms, alkyl (meth)acrylates having 1 to 10 carbon atoms in the alcohol group, vinyl esters having 1 to 11 carbon atoms in the acyl group, vinyl ethers having 1 to 10 carbon atoms in the alcohol group, (di)alkyl fumarates having 1 to 10 carbon atoms in the alcohol group, (di)alkyl maleates having 1 to 10 carbon atoms in the alcohol group and mixtures of these monomers, where the molar degree of branching is in the range of 0.

Abstract: The invention relates to a polymer comprising 50-100% by weight, with regard to the weight of the polymers, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R represents hydrogen or methyl; R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR?, wherein R? represents hydrogen or an alkyl group with 7 to 30 carbon atoms. The polymer is a star polymer with 3 to 21 arms and at least 3 of the arms consist of at least 40% by weight, with regard to the weight of the arms, of repeating units, which are derived from one or more ethylenically unsaturated ester compounds of formula (I), in which R1 represents a linear or unbranched alkyl radical with 7 to 30 carbon atoms, and; R2 and R3 independently represent hydrogen or a group of formula —COOR?, wherein R? represents hydrogen or an alkyl group with 7 to 30 carbon atoms.

Abstract: The invention relates to copolymers which are suitable for producing additives for solvent deparaffination of paraffin-containing mineral oil distillates and which consist of radically polymerized monomers of formulas A and B, wherein the radicals have the meaning cited in the description. The invention also relates to the use of said copolymers for the production of dewaxing additives.

Abstract: The present invention relates to processes for preparing carboxylic acid derivatives, comprising the reaction of at least one carboxylic acid and/or of a carboxylic acid derivative with at least one alcohol and/or an amine in the presence of a metal-containing catalyst, wherein, after the reaction has ended, the metal-containing catalyst is contacted with water and a superabsorbent, the contacting of the catalyst with the water leading to hydrolysis of the catalyst. The present invention further relates to the use of superabsorbents for removing a metal-containing catalyst from a mixture after hydrolysis of the catalyst.

Abstract: The present invention relates to motor fuel compositions comprising at least one diesel fuel of mineral origin and at least one biodiesel fuel, characterized in that the fuel composition contains at least 20% by weight of diesel fuel of mineral origin and 0.05% to 5% by weight of at least one polymer which comprises ester groups and contains repeating units that are derived from ester monomers having 16 to 40 carbon atoms in the alcohol radical, and repeating units that are derived from ester monomers having 7 to 15 carbon atoms in the alcohol radical. The present invention further describes the use of polymers comprising ester groups as flow improvers, and also a process for operating a diesel engine.

Abstract: A continuously variable composition copolymer is prepared in a reaction system, by (a) providing a reaction vessel comprising a first monomer composition; (b) providing a feed vessel comprising a second monomer composition; (c) initiating a polymerization reaction in the reaction vessel; (d) continuing the polymerization reaction during the gradual addition of the second monomer composition from the feed vessel to the reaction vessel, wherein the gradual addition of the second monomer composition is performed such that the continuously variable composition copolymer is obtained; (e) maintaining the polymerization until at least 90% of the total monomer composition has been converted to the copolymer; wherein the copolymer has a weight average molecular weight from 10,000 to 1,000,000; wherein the copolymer is soluble in lubricating oil, wherein the monomers of the first monomer composition provided in the reaction vessel comprise at least 50% by weight of all the monomers used to prepare the copolymer.