Abstract: A novel process can be used for the preparation of polyalkyl (meth)acrylate polymers with improved compositional distribution, which leads to better producibility, solubility, and improved performance of the polymers in lubricant compositions, especially in engine oil formulations.

Abstract: A novel process can be used for the preparation of polyalkyl (meth)acrylate polymers with improved compositional distribution, which leads to better producibility, solubility, and improved performance of the polymers in lubricant compositions, especially in engine oil formulations.

Abstract: Polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700,000 g/mol or greater and number-average molecular weights of 130,000 g/mol or greater can be used to improve the high temperature-high shear performance of lubricant compositions, especially of engine oil (EO) compositions. These polymers can be obtained in a reaction mixture comprising monomers, a dilution oil, and an initiator. The resulting lubricant compositions can have improved kinematic viscosity and high temperature high shear performance.

Abstract: Polyalkyl(meth)acrylate based comb polymers with weight-average molecular weights of 700,000 g/mol or greater and number-average molecular weights of 130,000 g/mol or greater can be used to improve the high temperature-high shear performance of lubricant compositions, especially of engine oil (EO) compositions. These polymers can be obtained in a reaction mixture comprising monomers, a dilution oil, and an initiator. The resulting lubricant compositions can have improved kinematic viscosity and high temperature high shear performance.

Abstract: The present invention relates to a lubricant composition for a process for reducing the paraffin content of mineral oil compositions, by providing a mineral oil composition with a dewaxing aid, cooling to form a paraffin precipitate and at least partly removing the paraffin precipitate formed. The dewaxing aid used is a copolymer mixture comprising at least three copolymers, the copolymers differing in the composition of the repeat units.

Abstract: The present invention relates to a lubricant composition for a process for reducing the paraffin content of mineral oil compositions, by providing a mineral oil composition with a dewaxing aid, cooling to form a paraffin precipitate and at least partly removing the paraffin precipitate formed. The dewaxing aid used is a copolymer mixture comprising at least three copolymers, the copolymers differing in the composition of the repeat units.

Abstract: The present invention relates to a process for producing a dispersion comprising at least one carrier medium, at least one emulsifier and at least one polymer based on polyolefins, by dispersing a heterogeneous composition using a mixer which works by the rotor-stator principle. The present invention additionally describes a polymer dispersion obtainable by the process.

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 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 relates to a polymer dispersion having high stability, comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) mineral oil and D) at least one compound comprising (oligo)oxyalkyl groups.

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 present invention relates to a polymer dispersion having high stability, comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) mineral oil and D) at least one compound comprising (oligo)oxyalkyl groups.

Abstract: The present invention relates to a stable polymer dispersion comprising A) at least one dispersed polyolefin, B) at least one dispersing component, C) at least one ester and D) at least one ether comprising (oligo)oxyalkyl groups, the weight ratio of ester C) to ether D) being in the range from 30:1 to 1:30.

Abstract: What are disclosed are a method for making a concentrated emulsion of an olefin copolymer in a carrier medium suitable for use in oil additives, without previous dissolution of the olefin copolymers, by preparing a solution of an emulsifier of the typeA-X,wherein A represents a sequence or segment of an olefin copolymer, of hydrogenated polyisoprene, or of an hydrogenated butadiene/isoprene copolymer, and X represents a sequence or segment composed of polyacrylate and/or polymethacrylate, in a carrier medium which does not substantially dissolve the olefin copolymers but does dissolve the X sequences, and then emulsifying an olefin copolymer in the solution of the emulsifier in the carrier medium at a temperature from 40.degree. C. to 150.degree. C. with the use of shearing forces, as well as emulsions made by such a method.