Abstract: A pseudoplastic powder clearcoat slurry free from organic solvents and external emulsifiers and comprising particles which are solid and/or of high viscosity and are dimensionally stable under storage and application conditions, where

Abstract: A pseudoplastic powder clearcoat slurry which is free from organic solvents and external emulsifiers and comprises solid spherical particles with an average size of from 0.8 to 20 &mgr;m and a maximum size of 30 &mgr;m, at least one ionic thickener and at least one nonionic associative thickener, the powder clearcoat slurry having an ion-forming group content of from 0.05 to 1 meq/g, a neutralizing agent content of from 0.05 to 1 meq/g, and a viscosity of (i) from 50 to 1 500 mPas at a shear rate of 1 000 s−1, (ii) from 150 to 8 000 mPas at a shear rate of 10 s−1, and (iii) from 180 to 12 000 mPas at a shear rate of 1 s−1.

Abstract: Reactive compositions which consist of or comprise (A) at least one polyisocyanate whose isocyanate groups have been partly or fully blocked with propargyl alcohol, (B) at least one constituent which contains on average at least two isocyanate-reactive functional groups in the molecule, and (C) at least one catalyst which catalyzes the addition reaction of the isocyanate-reactive functional groups of (B) with the acetylenically unsaturated triple bond of the propargyl groups, and their use as coating materials, adhesives, and sealing compounds.

Abstract: The invention relates to a pseudoplastic powdered lacquer slurry, free of organic solvents and external emulsifiers comprising solid and/or highly viscous particles which are dimensionally stable under storage and application conditions with an average particle size of 0.8 to 20 &mgr;m and a maximum particle size of 30 &mgr;m, whereby said particles contain at least one binding agent and at least one cross-linking agent. As cross-linking agent: (A) at least one cross-linking agent, by means of which soft segments may be introduced into the three-dimensional network of the lacquer, (B) at least one cross-linking agent, by means of which hard segments may be introduced into the three-dimensional network of the lacquer or alternatively (A/B) at least one cross-linking agent, by means of which both soft and hard segments may be introduced into the three-dimensional network is/are used.

Abstract: A coil coating process in which a metal strip is coated continuously on one or two sides with at least one coating material and then the applied coating film(s) is (are) cured, at least one of the coating materials being a pigmented or unpigmented powder coating dispersion (powder slurry) and the applied powder slurry film(s) being heated so that

Abstract: A process for producing multicoat color and/or effect paint systems on automobile bodies by

Abstract: The present invention relates to a process for producing single-coat or multicoat clearcoat finishes on primed or unprimed substrates by applying at least one powder coating dispersion, in particular a powder clearcoat slurry, to the substrate and then curing the resulting film(s) thermally and/or with actinic radiation, in which oxalic acid is added to at least one powder coating dispersion, in particular to a powder clearcoat slurry.

Abstract: The invention relates to a pseudoplastic, powdered lacquer slurry, free of organic solvents, comprising solid and/or highly viscous particles, with an average particle size of 0.8 to 20 &mgr;m, which are dimensionally stable under conditions of storage and usage, whereby at least 99% of the particles have a particle size ≦30 &mgr;m. Said slurry may be produced by: 1) emulsifying an organic solution, containing binders and cross-linking agents, resulting in an oil-in-water type emulsion, 2) removing the organic solvent(s) and 3) wet milling the resulting slurry. The invention further relates to the use of the powdered lacquer slurry, for the production of lacquers for automobile production, automobile repair work, furniture painting and industrial painting including coil coating, container coating and the coating of electrical components.

Abstract: Novel powder clearcoat materials and novel powder clearcoat slurries comprising a) at least one epoxide-containing binder containing from 0.5 to 40% by weight, based on the binder, of copolymerized glycidyl-containing monomers, and b) at least one tris(alkoxy-carbonylamino)triazine and at least one polycarboxylic acid, in particular a straight-chain dicarboxylic acid, and/or a carboxy-functional polyester as crosslinking agent, or alternatively a) at least one tris(alkoxy-carbonylamino)triazine and at least one oligomeric or polymeric, epoxide-containing crosslinking agent containing from 0.5 to 40% by weight, based on the crosslinking agent, of copolymerized glycidyl-containing monomers, and/or a low molecular mass, epoxide-containing crosslinking agent, and b) at least one carboxyl-containing polymer as binder, both variants comprising c) at least one polyol.

Abstract: The present invention relates to a process for producing single-coat or multicoat clearcoat finishes on primed or unprimed substrates by applying at least one powder coating dispersion, in particular a powder clearcoat slurry, to the substrate and then curing the resulting film(s) thermally and/or with actinic radiation, in which at least one polyvalent inorganic acid and/or oxalic acid are or is added to at least one powder coating dispersion, in particular to a powder clearcoat slurry.

Abstract: The present invention relates to an aqueous dispersion comprising a solid pulverulent component A and an aqueous component B, said component A comprising a UV-curable powder coating material.

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: 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 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.

Abstract: The invention relates to a process for preparing an aqueous powder coating dispersion, which comprises introducing a liquid melt comprising binders and crosslinking agents and also, if desired, catalysts, auxiliaries and further additives such as devolatilizers, UV absorbers, free-radical scavengers and/or antioxidants into an emulsifying apparatus, preferably with the addition of water and stabilizers, and cooling and filtering the resultant emulsion.

Abstract: The invention relates to aqueous powder coating dispersions based on epoxy resins, consisting of a solid, pulverulent component I and an aqueous component II, component I being a powder coating comprising: A) at least one epoxy resin having an epoxide equivalent weight of from 300 to 5500 daltons, B) at least one di- and/or polycarboxylic acid as curing agent, comprising one or more organosilyl groups in the molecule, if desired in a mixture with other di- and/or polycarboxylic acids which contain no organosilyl group as substituent, and C) if desired, catalysts, fillers, auxiliaries and/or additives specific to powder coating, such as degassing agents, leveling agents, free-radical scavengers, antioxidants and/or UV absorbers, and component II being an aqueous dispersion comprising: D) at least one nonionic thickener and E) if desired, catalysts, auxiliaries, defoaming agents, dispersion auxiliaries, wetting agents, preferably carboxyl-containing dispersants, anti-oxidants, UV absorbers, free-radical s

Abstract: The present invention relates to an aqueous powder coating dispersion comprising a solid, pulverulent component A and an aqueous component B, in which component A. is a powder coating comprisinga) at least one epoxide-containing binder with a content of from 30 to 45%, preferably from 30 to 35%, of glycidyl-containing monomers and, if desired, with a content of aromatic vinyl compounds, preferably styrene,b) at least one crosslinking agent, preferably straight-chain aliphatic dicarboxylic acids and/or carboxy-functional polyesters, andc) if desired, catalysts, auxiliaries, typical powder coating additives, such as degassing agents, levelling agents, UV absorbers, free-radical scavengers and antioxidants,and component B.

Abstract: The invention relates to a method of coating articles with powder coatings which contain polymers, are applied to the surface of the substrate to be coated, are melted and are crosslinked by UV irradiation, wherein the polymers employed are copolymers ofa) at least one monomer of the general formula (I) ##STR1## where R.sup.1 =H or CH.sub.3 and R.sup.2 =H, C.sub.n H.sub.2n+1 where n=from 1 to 30, or is an alicyclic, araliphatic or heterocyclic radical, hydroxyalkyl, alkoxyalkyl, glycidyl or aminoalkyl,or of the general formula (II) ##STR2## where R.sup.1 =H or CH.sub.3 and where R.sup.3 and R.sup.4 may be identical to or different from one another and are H, CH.sub.2 OH, C.sub.n H.sub.2n+1 where n=1 to 30 or CH.sub.2 OR.sup.5 where R.sup.5 =C.sub.m H.sub.2m+1 where m=1 to 12, andb) at least one copolymerizable, ethylenically unsaturated organic compound of the general formula (A) ##STR3## where R' and R" can be identical to or different from one another and are H, C.sub.p H.sub.

Abstract: A description is given of a process for preparing a multilayer coating on a substrate surface, in which(A) an aqueous coating composition (ii) containing as film-forming agent an aqueous polymer dispersion is applied as basecoat (II) to a substrate surface coated with an aqueous basecoat (i),(B) the composition applied in step (A) is subjected to partial drying,(C) an appropriate transparent topcoat composition is applied to the basecoat (II) thus obtained, and(D) the basecoats (I) and (II) are baked together with the topcoat,wherein the basecoat composition (II) contains an aqueous polymer dispersion comprising(x) an acrylate polymer based on from 30 to 60% by weight of C.sub.1 -C.sub.8 -alkyl (meth)acrylate monomers, from 30 to 60% by weight of vinyl-aromatic monomers and from 0.5 to 10% by weight of (meth)acrylic acid, and(y) a thickener, which does not have an associative effect, containing an acrylate copolymer based on (C.sub.1 -C.sub.6)-alkyl (meth)acrylate and (meth)acrylic acid.