Abstract: Pulverulent coating materials composed of (A) leaflet-shaped particles having a ratio of laminar diameter D to layer thickness d, i.e., D:d of from 100:1 to 10:1, comprising at least one leaflet-shaped effect pigment in complete or near-complete parallel orientation to the surface of the leaflet-shaped particles, and (B) transparent, dimensionally stable, non-leaflet-shaped particles or leaflet-shaped particles having a ratio of laminar diameter D to layer thickness d, i.e., D:d of <10:1 which are free from leaflet-shaped effect pigments; process for preparing them, and their use.

Abstract: Solid pigment preparations containing (A) at least one pigment in a higher concentration than that which corresponds to the subsequent application and (B) at least one carrier material selected from the group consisting of oligomers and polymers which have a glass transition temperature >30° C. and a melting point or melting range below their decomposition temperature, prepared by dispersing the pigment or pigments (A) or the pigment or pigments (A) and at least one constituent (D) in the melt of the carrier material or materials (B) or in the melt of the carrier material or materials (B) and at least one constituent (D) with a power input of from 0.1 to 1.0 kW/kg for from 0.5 to 5 hours in a discontinuously operating dispersing apparatus, and then discharging the mixture from the dispersing apparatus and allowing it to cool and solidify. The preparation and use of said pigment preparations.

Abstract: A blend activatable with actinic radiation and solid at room temperature, comprising (A) at least one crystalline compound containing on average per molecule at least one reactive functional group having at least one bond which can be activated with actinic radiation, and (B) at least one amorphous compound containing on average per molecule at least one reactive functional group having at least one bond which can be activated with actinic radiation; process for its preparation, and its use.

Abstract: A blend activatable with actinic radiation and solid at room temperature, comprising (A) at least one crystalline compound containing on average per molecule at least one reactive functional group having at least one bond which can be activated with actinic radiation, and (B) at least one amorphous compound containing on average per molecule at least one reactive functional group having at least one bond which can be activated with actinic radiation; process for its preparation, and its use.

Abstract: A curable powder coating material preparable by applying at least one dispersion and/or at least one solution (I) comprising (A) at least one functional constituent of a powder coating material, (B) at least one solvent, and, if desired, (C) at least one oligomeric and/or polymeric constituent, with partial, essentially complete or complete evaporation of the solvent or solvents (B) to the surface of dimensionally stable particles (II); and also a novel mixer system and a novel process for preparing and/or subsequently adjusting the material composition and/or performance properties profile of curable powder coating materials, using at least one dispersion and/or at least one solution (I).

Abstract: Process for producing coatings, adhesive films or seals which comprises

Abstract: A process for producing multicoat color and/or effect finishes on motor vehicle bodies or parts thereof (substrates), in which (I) a pigmented powder coating material is applied to the substrates, (II) the resulting powder coating film is partly or fully cured, (III) the powder coating film or powder coating is overcoated with a solid-color topcoat, with a basecoat and a clearcoat, or with a clearcoat, after which (IV) the resulting films are cured in each case individually or together with other films (wet-on-wet technique), wherein said powder coating material (A) comprises at least one carboxyl-containing polyester and (B) comprises at least one glycidyl ester of an aromatic or of a saturated or unsaturated cycloaliphatic dicarboxylic acid and/or at least one N,N,N′,N′-tetrakis(beta-hydroxyalkyl)alkanedicarboxamide, or (A) comprises at least one hydroxyl-containing polyester and (B) comprises at least one internally blocked uretdione of a diisocyanate.

Abstract: A powder coating material comprising, based on the coating material, (A) from 40 to 65% by weight of at least one solid epoxy resin which is polyfunctional in respect of thermal crosslinking by way of the epoxide groups and has an epoxide equivalent weight of from 380 to 420 g/equ., an ICI melt viscosity at 150° C. of from 2800 to 5000 mPas, and a softening point of from 95 to 105° C., (B) from 15 to 35% by weight of at least one solid, linear epoxy resin based on bisphenol A, AD and/or F, having a functionality in respect of thermal crosslinking by way of the epoxide groups of not more than 2, (C) from 15 to 30% by weight of an inorganic filler and (D) from 1 to 10% by weight of at least one hardener; and its use for producing functional coatings for substrates for high long-term service temperatures.

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: The present invention relates to a process for the production of a powder coating, in which a suspension of powder particles is sprayed and the spray jet is directed onto the substrate to be coated, characterized in that1.) a suspension of powder particles in a liquefied gas is employed, the gas having been liquefied under a pressure of not more than 20 bar, and2.) the liquid gas is vaporized before, during or after the spraying of the suspension.

Abstract: The invention relates to powder coatings which are characterized in that they contain as film-forming material a mixture of(A) from 19.9 to 90.0 percent by weight of a synthetic resin which contains epoxide groups and may contain ethylenically unsaturated double bonds, or of a mixture of such epoxide group-containing synthetic resins,(B) from 9.9 to 80.0 percent by weight of a compound which contains carboxyl groups and may contain ethylenically unsaturated double bonds, or of a mixture of such carboxyl group-containing compounds,(C) from 0 to 20 percent by weight of a compound which contains ethylenically unsaturated double bonds and is different from (A) and (B), or of a mixture of such compounds, and(D) from 0.1 to 3.0 percent by weight of an initiator for free-radical polymerizations or of a mixture of initiators for free-radical polymerizations,the percentages by weight of (A)+(B)+(C)+(D) being=200% by weight and the mixture of components (A), (B), (C) and (D) containing from 0.1 to 6.

Abstract: The invention relates to a process for the production of two-coat finishes, in which a pigmented basecoat is first applied, the resulting basecoat film is coated with a powder clearcoat, and basecoat and clearcoat are subsequently baked together. In accordance with the invention, the powder clearcoat employed is a powder coating which contains an epoxide group-containing polyacrylate resin as binder and a mixture of (A) a polyanhydride and (B) a carboxyl group-containing polyester resin as crosslinking agent. The polyester resin can be prepared by reacting a diol (b1), a compound (b2) which contains per molecule at least three functional groups selected from hydroxyl, primary amino, secondary amino, carboxyl and acid anhydride groups, and (b3) a dicarboxylic acid in a molar ratio of (b1): (b2): (b3)=0.0 to 3.0: 1.0: 1.5 to 9.0 to give a polyester resin having an acid value of 40 to 300.

Abstract: The invention relates to a process for the preparation of powder coatings, in which a mixture ofA) a binder comprising an epoxide group-containing synthetic resin or a mixture of epoxide group-containing synthetic resins, andB) a crosslinking agent comprising a compound which contains on statistical average at least two carboxyl groups and at least one acid anhydride group per molecule, or a mixture of such compounds, is admixed before or during the melt homogenization process withC) a polyol or a mixture of polyols in such an amount that from 0.1 to 0.9 hydroxyl groups of component C) are present per acid anhydride group of component B).The mixture is homogenized in the molten state and the resulting homogenized melt, after having cooled and solidified, is powdered.