Abstract: The invention relates to a method for producing a pigment paste and an electrocoat containing the paste, the past being made by mixing solid pigment particles with a grind resin in the presence of water and/or an organic liquid, wherein the grind resin includes a dispersion of core-shell particles in an epoxide prepolymer which is liquid at 20° C. and the core-shell particles have a silicone core and a polymer shell.

Abstract: The invention relates to a method for producing a pigment paste by mixing at least one pigment, consisting of solid particles, with a grind resin in the presence of water and/or an organic liquid, wherein the grind resin comprises a dispersion of core-shell particles in an epoxide prepolymer which is liquid at 20° C., or consists of such a dispersion, and the core-shell particles have a silicone core and a polymer shell. The invention also relates to an aqueous electrocoat material, to the use thereof, to a method for cataphoretic electrocoating, and to a coated article.

Abstract: The present invention relates to an aqueous coating composition (A) comprising at least one cathodically depositable binder (A1) and optionally at least one crosslinking agent (A2), for at least partly coating an electrically conductive substrate with an electrocoat material, where the coating composition (A) has a pH in a range from 4.0 to 6.5 and comprises a total amount of at least 30 ppm of bismuth, based on the total weight of the coating composition (A), and where the aqueous coating composition (A) is produced using at least 0.01% by weight of aluminum oxide particles (B), based on the total weight of the coating composition (A), to the use of (A) for at least partly coating an electrically conductive substrate with an electrocoat material, to a corresponding coating method, and to an at least partly coated substrate obtainable by this method.

Abstract: The present invention relates to a method for at least partly coating an electrically conductive substrate, comprising at least the steps of (1): at least partly coating the substrate with a dipping varnish comprising at least one binder, by at least partial electrophoretic deposition of the dipping varnish on the substrate surface, and (2): contacting the substrate at least partly coated with the dipping varnish with an aqueous composition, where the aqueous composition used in step (2) is an aqueous sol-gel composition and step (2) takes place before curing of the electrophoretically deposited dipping varnish, to an at least partly coated substrate obtainable by this method, and to the use of an aqueous sol-gel composition for aftertreating a dipping varnish layer applied at least partly to an electrically conductive substrate by an at least partial electrophoretic deposition.

Abstract: The present invention relates to an acidic aqueous particulate composition containing, in addition to iron(III) ions, fluoride ions and at least one water-insoluble, dispersed organic binder, a water-insoluble, dispersed oxide pigment with elevated resistance to agglomeration for the autophoretic deposition of organic-inorganic hybrid layers onto metal surfaces, the composition additionally containing at least one anionic wetting agent which comprises functional groups selected from sulfonates, phosphonates and/or carboxylates. The invention furthermore comprises the use of such a composition for the autodeposition of a film-forming organic-inorganic hybrid coating onto metal surfaces which are at least in part selected from surfaces, the main constituents of which are iron, zinc and/or aluminum.

Abstract: The present invention relates to an acidic aqueous particulate composition containing, in addition to iron(III) ions, fluoride ions and at least one water-insoluble, dispersed organic binder, a water-insoluble, dispersed oxide pigment with elevated resistance to agglomeration for the autophoretic deposition of organic-inorganic hybrid layers onto metal surfaces, the composition additionally containing at least one anionic wetting agent which comprises functional groups selected from sulfonates, phosphonates and/or carboxylates. The invention furthermore comprises the use of such a composition for the autodeposition of a film-forming organic-inorganic hybrid coating onto metal surfaces which are at least in part selected from surfaces, the main constituents of which are iron, zinc and/or aluminum.