Abstract: The invention relates to a substrate provided with a multilayer coating. The invention additionally relates to a process for its preparation, in which the body to be coated passes via the entry 1 into the pretreatment stage 2. This is followed by electrodeposition coating 3 and the baking 4 of the electrodeposition coat. In stage 5 preparation takes place for coating with powder coating material (stage 6). In stage 7 drying is carried out with IR irradiation. This is followed by the cooling stage 7. The powder coating material is applied to the powder coat in stage 9. Following passage through the intermediate drying stage 10 a protective coat is applied in stage 11 and then is baked in stage 12. The body is transported out of the unit via the exit 11.

Abstract: The present invention relates to a process for producing coated substrates, especially coated automobile bodies, coils and furniture, in which first of all a powder slurry clearcoat material and then a sol-gel clearcoat material are applied to an optionally precoated substrate and are then cured conjointly.

Abstract: The present invention relates to a method of coating substrates, preferably of metal, by cleaning the substrate surface, applying, if desired, an organic and/or inorganic pretreatment composition, applying a primer, applying a coating material by spraying, dipping, knifecoating, rollercoating or brushing, the coating material comprising an amine-modified epoxy resin and a crosslinking agent suitable for crosslinking.

Abstract: A process for producing scratch-resistant coatings, especially scratch-resistant multicoat finishes, involving use of coating compositions which, after curing, have a storage modulus E′ in the rubber-elastic range of at least 107.5 Pa and a loss factor tan&dgr; at 20° C. of at least 0.05, the storage modulus E′ and the loss factor having been measured by dynamic mechanical thermoanalysis on free films having a film thickness of 40±10 &mgr;m, and comprise as binders one or more polyacrylate resins having a hydroxyl number of from 100 to 240, an acid number of from 0 to 35, and a number-average molecular weight of from 1500 to 10,000, and as crosslinkers one or more free or blocked isocyanates and/or triazine-based components which crosslink with the hydroxyl groups of the binder to form ether and/or ester structures.

Abstract: The invention relates to nonaqueous coatings containing a polyacrylate resin and a urea group-containing thixotropic agent and having improved surface properties. The polyacrylate resin is prepared by polymerizing (a) from 16 to 51% by weight of a hydroxyl group-containing ester of acrylic acid or methacrylic acid or of a mixture of such monomers; (b)from 32 to 84% by weight of an aliphatic or cycloaliphatic ester of acrylic acid or methacrylic acid which is different from (a) and has at least 4 carbon atoms in the alcohol radical or of a mixture of such monomers; (c) from 0 to 2% by weight of an ethylenically unsaturated carboxylic acid or of a mixture of ethylenically unsaturated carboxylic acids, and (d)from 0 to 30% by weight of an ethylenically unsaturated monomer which is different from (a), (b) and (c) or of a mixture of such monomers.

Abstract: The present invention concerns films provided with several layers, characterised by the fact that: (A) the surface of a 10-500 &mgr;m thick plastic film is coated optinally with a filler composition layer; (B) the surface of the plastic film or filler layer is given at least one pigmented lacquer layer; (C) the pigmented lacquer layer is optionally coated with a transparent plastic film.

Abstract: A mixer system, for preparing two-component water-dilutable coating agents, includes a plurality of substantially water-free base colors and a pigment-free aqueous component. One or more of the base colors can be mixed together with a suitable amount of the aqueous component to match a preexisting coating color on a substrate to be repaired. Each of the base colors includes a pigment, an organic solvent and a first binder. The pigment-free aqueous component includes water and a second binder. The second binder is a polymer made from a mixture which includes a monomer component, an initiator, and an aqueous dispersion of a polyurethane resin. Cured coatings which are prepared from compositions using the disclosed mixer system exhibit improved condensation resistance, as compared with previously known coatings.

Abstract: The present invention provides a polyurethane resin obtainable by (A) in a first reaction stage (A) reacting (a) one or more di- and/or polyisocyanates, (b) one or more compounds (b) which have at least one group which ensures dispersibility in water and more than one group which is reactive toward isocyanate groups, and (c) if desired, one or more compounds having at least 2 and not more than 3 OH groups to give an intermediate (A) having free isocyanate groups and having urethane groups, (B) in a second reaction stage (B) adding (d) one or more monoisocyanates to the intermediate (A) obtained in stage (A), and (C) subsequently reacting the resulting mixture (B) with one or more hydroxyl-containing polymers (D) to give the polyurethane resin (P), using less than 20% by weight, based on the weight of the polyurethane resin (solids content), of polyalkylene oxide diols and/or polyalkylene oxide polyols to prepare the polyurethane resin.

Abstract: A method of removing, by oxidation at the anode, the acid liberated in cathodic dip-coating in the course of the deposition of the coating film, using anodes coated with a layer of tin oxide or with a mixture of tin oxide with ruthenium or iridium oxides.

Abstract: The present invention relates to a process for the preparation of polyurethane resins, in which, in an ester as solvent, a) at least one compound having 2 hydroxyl and/or amino groups, b) at least one di- and/or polyisocyanate, c) at least one compound containing 2 groups which are reactive toward isocyanate groups, these compounds containing, at least in part, at least one group capable of forming anions which is neutralized before or after incorporation of component (c) into the polyurethane molecule, and d) at least one compound having at least 3 hydroxyl and/or amino groups are used to prepare a polyurethane resin, preferably using components (a), (b) and (c) to prepare an intermediate which has terminal isocyanate groups and at least some of whose free isocyanate groups are subsequently reacted with component (d), characterized in that ethoxyethyl propionate is employed as solvent.

Abstract: The present invention relates to a transparent powder coating dispersion comprising a solid, pulverulent component A and an aqueous component B, component A being a powder coating material comprising a) at least one epoxy-containing binder having a content of from 30 to 45%, preferably from 30 to 35%, by weight of glycidyl-containing monomers, with or without a content of vinylaromatic compounds, preferably styrene, b) tris(alkoxycarbonylamino)triazine and polycarboxylic acids, preferably straight-chain aliphatic dicarboxylic acids and/or carboxy-functional polyesters, as crosslinking agents, component B being an aqueous dispersion comprising a) at least one nonionic thickener.

Abstract: Aqueous solutions or dispersions of binders for preparing aqueous coating materials are produced, including as an aqueous component water of reaction which is obtained during the condensation of alcohols with carboxylic acids.

Abstract: The invention relates to a coating composition comprising at least one OH-functional binder component and at least one component compound, functioning as a crosslinking agent, which has NCO groups blocked with a pyrazole compound.

Abstract: The present invention relates to a water-thinnable coating composition comprising binders, inorganic pigments, and, if desired, organic pigments and also further customary additives such as solvents, fillers, plasticizers, stabilizers, wetting agents, dispersing auxiliaries, levelling agents, defoamers, catalysts and also further additives, individually or in a mixture with one another, and comprises at least one phosphoric ester and at least one fatty alcohol alkoxylate.

Abstract: The present invention relates to an aqueous powder clearcoat dispersion comprising a solid pulverulent component A and an aqueous component B, where component A is a transparent powder coating material comprising a) at least one epoxy binder containing from 25 to 45% by weight, preferably from 25 to 35% by weight, of glycidyl-containing monomers, with or without a fraction of vinylaromatic compounds, preferably styrene, b) at least one crosslinking agent, preferably straight-chain, aliphatic dicarboxylic acids and/or carboxy-functional polyesters, and c) if desired, catalysts, auxiliaries, additives typical for transparent powder coating materials, such as devolatilizers, leveling agents, UV absorbers, free-radical scavengers, and antioxidants, and component B is an aqueous dispersion comprising a) at least one nonionic thickener and b) if desired, catalysts, auxiliaries, defoamers, wetting agents, antioxidants, UV absorbers, free-radical scavengers, biocides, small amounts of solvent, leveling agents,

Abstract: The present invention relates to a transparent powder coating material comprising a) at least one epoxy-containing binder with a content of from 20 to 45% by weight, preferably from 25 to 40% by weight of glycidyl-containing monomers and with or without a content of vinylaromatic compounds, preferably styrene, b) tris(alkoxycarbonylamino)triazine and polycarboxylic acids, preferably straight-chain aliphatic dicarboxylic acids and/or carboxy-functional polyesters, as crosslinking agents, and c) if desired, catalysts, auxiliaries, additives typical for transparent powder coating materials, such as degassing agents, levelling agents, UV absorbers, free-radical scavengers, antioxidants.

Abstract: The invention relates to a process for applying a multicoat finish to a substrate surface, comprising the following steps: (1): applying an aqueous basecoat A to the substrate surface, (2): forming a polymer film from the aqueous basecoat A applied in stage (1), (3): applying an aqueous transparent topcoat B to the basecoat film obtained in stage (2), and finally (4); baking the basecoat film and the topcoat film together, wherein the basecoat A comprises at least one hydroxyl-containing binder in aqueous solution or dispersion and a stable aqueous dispersion, prepared with a hydroxyl-containing emulsifier, of a hydrophobicized amino resin, and to substrates coated in accordance with the process of the invention.

Abstract: The invention relates to aqueous clearcoats comprising a multicomponent aqueous dispersion which comprises: A) at least one aqueous dispersion of a hydroxyl-containing binder, and B) a stable aqueous dispersion of a hydrophobic amino resin, said dispersion being prepared using a hydroxyl-containing emulsifier. The hydrophobic amino resin in component B) is preferably a hydrophobic melamine resin and the hydroxyl-containing binder in component A) is preferably a hydroxyl-containing polyacrylate. Further embraced by the invention are a method of applying multilayer coatings, in which the aqueous coating materials of the invention are used as topcoat, and substrates coated with such multilayer coatings.

Abstract: The present invention relates to a coating composition comprising at least three components, characterized in that component (I) contains as binder at least one acrylate copolymer which is dissolved or dispersed in organic solvent and has a number-average molecular weight of between 1000 and 30,000, an OH number of from 40 to 200 and an acid number of from 5 to 150 and/or polyester resin having a number-average molecular weight of between 1000 and 30,000, an OH number of from 30 to 250 and an acid number of from 5 to 150 and/or polyurethane resin having a number-average molecular weight of between 1000 and 30,000, an OH number of from 20 to 200 and an acid number of from 5 to 150, and, if desired, a further binder, the binder components being selected such that a 50% strength solution of the binder in ethoxyethyl propionate has a viscosity at 23° C. of ≦2.

Abstract: The present invention relates to an aqueous powder coating dispersion which can be prepared by processing the binder of the powder coating material and/or the crosslinker of the powder coating material or the entire powder coating material to give a powder by spray drying and then preparing an aqueous powder coating dispersion using the spray-dried powder. The present invention additionally relates to a process for preparing the aqueous powder coating dispersion and to the use of the powder coating dispersion, especially for the coating of automobile bodies.