Abstract: The invention relates to a (meth)acrylate polymer for improving the viscosity index, which comprises a) from 5 to 60 wt % of repeating units that are derived from (meth)acrylates of formula (I), where R represents hydrogen or methyl and R1 is an alkyl radical having from 1 to 6 carbon atoms, b) from 5 to 80 wt % of repeating units that are derived from (meth)acrylates of formula (II), where R is hydrogen or methyl and R2 is an alkyl radical having from 7 to 30 carbon atoms, and c) from 15 to 90 wt % of repeating units that are derived from (meth)acrylates of formula (III), where R is hydrogen or methyl, n is an integer in the range of 2 to 500 and A is C2-C4 alkylene and R3 is a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms.

Abstract: A lubricant which contains an ester oil and a polyalkyl(meth)acrylate copolymer having in copolymerized form a C1-C4 alkyl(meth)acrylate, and a C4-C4000 alkyl(meth)acrylate exhibits an improved Viscosity Index compared to a lubricant having no ester oil.

Abstract: The invention relates to the use of graft polymers obtained by polymerization in two stages.

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 a process for producing lubricating grease by adding a polymeric structure improver in a composition liquid at 25° C. to the dispersion to a dispersion which has grease structure and comprises at least one thickener and at least one lubricating oil.

Abstract: The invention relates to the use of polyalkyl ester for reducing the temperature in a lubricating oil composition. The polyalkyl ester has a specific viscosity ?sp/c of between 5 and 30 ml/g, measured in chloroform at 25° C.

Abstract: The invention relates to lubricating oil formulations comprising copolymers or graft copolymers produced by radically polymerising polymerisable monomers and, in addition comprising long-chain ethylenically unsaturated compounds containing alkyl, in particular acrylate or methacrylate substitutes provided with hydrogen-bridge donator functions. The monomer exhibiting a hydrogen-bridge donator property is contained, according to said invention, in the polymer backbone or in graft side branches. Apart from the polymers containing monomers provided with hydrogen-bridge donator functions, said invention relates to polymers containing monomers simultaneously carrying donator and acceptor functions. It was found that the hydrogen-bridge donator functions of a polymer, in particular a simultaneous availability of the hydrogen-bridge donator and acceptor functions produce the positive effects on the anti-wear protection and on a detergency and dispersancy action.

Abstract: The present invention relates to a transmission lubricant comprising at least 30% by weight of polyalkyl (meth)acrylate. The present invention further describes polyalkyl (meth)acrylates for use in lubricants and also processes for preparing them and their use. The present lubricants can be used particularly in wind turbine transmissions.

Abstract: The invention relates to graft copolymers produced by radically polymerizing polymerisable monomers and, in addition comprising long-chain ethylenically unsaturated compounds which contain alkyl substitutes, in particular acrylates or methacrylates and monomers with hydrogen bridge donator functions. According to said invention, said hydrogen bridge donator monomer is introduced into a polymer backbone and into graft side branches. The inventive polymers are particularly usable for lubricating oil formulations.

Abstract: The invention relates to a (meth)acrylate polymer for improving the viscosity index, which comprises a) from 5 to 60 wt % of repeating units that are derived from (meth)acrylates of formula (I), where R represents hydrogen or methyl and R1 is an alkyl radical having from 1 to 6 carbon atoms, b) from 5 to 80 wt % of repeating units that are derived from (meth)acrylates of formula (II), where R is hydrogen or methyl and R2 is an alkyl radical having from 7 to 30 carbon atoms, and c) from 15 to 90 wt % of repeating units that are derived from (meth)acrylates of formula (III), where R is hydrogen or methyl, n is an integer in the range of 2 to 500 and A is C2-C4 alkylene and R3 is a hydrogen atom or an alkyl radical having from 1 to 4 carbon atoms.

Abstract: The present invention describes a polymer useful as viscosity index improver comprising units derived from one or more ethylenically unsaturated ester compounds of formula (I), where R is hydrogen or methyl, R1 means a linear, branched or cyclic alkyl residue with 1-6 carbon atoms, R2 and R3 independently represent hydrogen or a group of the formula —COOR?, where R? means hydrogen or a alkyl group with 1-6 carbon atoms, units of one or more ethylenically unsaturated ester compounds of formula (II), where R is hydrogen or methyl, R4 means a 2-alkyl branched alkyl residue with 12-18 carbon atoms, R5 and R6 independently are hydrogen or a group of the formula —COOR?, where R? means hydrogen or an alkyl group with 12-18 carbon atoms, and units of one or more ethylenically unsaturated ester compounds of formula (III), where R is hydrogen or methyl, R7 means a linear alkyl residue with 12-24 carbon atoms, R8 and R9 independently are hydrogen or a group of the formula —COOR?, where R? means hydrogen or an alkyl grou

Abstract: The invention relates to a lubricating oil composition with good frictional properties, the composition having a lubricating oil and at least one additive having friction-reducing properties. The additive with friction-reducing properties is a block copolymer having hydrophobic segments P and polar segments D. The hydrophobic segments are obtained by polymerization of monomer compositions having a) between 0 and 40 wt. %, in relation to the weight of the monomer compositions for producing the hydrophobic segments, of at least one ethylenically unsaturated ester compound of formula (I), in which R represents hydrogen or methyl, R1 represents a linear or branched alkyl radical having between 1 and 5 carbon atoms, and R2 and R3 independently represent hydrogen or a group of formula —COOR?, in which R? represents hydrogen or an alkyl group having between 1 and 5 carbon atoms.

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 the use of comb polymers comprising, in the main chain, repeat units derived from polyolefin-based macromonomers with a molecular weight of at least 500 g/mol, and repeat units derived from low molecular weight monomers with a molecular weight less than 500 g/mol, for improving the load-bearing capacity of hydraulic fluids. Furthermore, the present invention describes new hydraulic fluids.

Abstract: The present invention describes a composition comprising at least one polyalkyl(meth)acrylate polymer having a number average molecular weight Mn of from 1000 to 10000 g/mol and a polydispersity Mw/Mn of from 1 to 8 and at least one ethylene vinyl acetate copolymer comprising units being derived from at least one alkyl (meth)acrylate having 1 to 30 carbon atoms in the alkyl residue. The composition is useful as cold flow improver in fossil fuel oil and or biodiesel fuel oil.

Abstract: (EN) 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: A lubricant which contains an ester oil and a polyalkyl(meth)acrylate copolymer having in copolymerized form a C1-C4 alkyl(meth)acrylate, and a C4-C4000 alkyl(meth)acrylate exhibits an improved Viscosity Index compared to a lubricant having no ester oil.

Abstract: The present invention relates to copolymers obtainable by polymerizing a monomer composition composed of a) 0% to 40% by weight of one or more ethylenically unsaturated ester compounds of the formula (I) in which R is hydrogen or methyl, R1 is a linear or branched alkyl radical having 1 to 5 carbon atoms, R2 and R3 independently are hydrogen or a group of the formula —COOR?, in which R1 is hydrogen or an alkyl group having 1 to 5 carbon atoms, b) 10% to 99.

Abstract: The present invention relates to the use of comb polymers comprising, in the main chain, repeat units derived from polyolefin-based macromonomers with a molecular weight of at least 500 g/mol, and repeat units derived from low molecular weight monomers with a molecular weight less than 500 g/mol, for improving the load-bearing capacity of hydraulic fluids. Furthermore, the present invention describes new hydraulic fluids.

Abstract: The invention relates to the use of comb polymers comprising repeating units in the main chain which repeating units are derived from polyolefin-based macromonomers having a molecular weight of at least 500 g/mol, and repeating units which are derived from low-molecular monomers having a molecular weight of less than 500 g/mol as antifatigue additives in lubricants. The invention further relates to novel comb polymers and methods for the production thereof and to lubricating oils comprising said comb polymers.