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 (A) comprises a total amount of at least 30 ppm of bismuth, based on the total weight of (A), and additionally at least one phosphorus-containing compound (P) blocked with at least one amine of the general formula (I), 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.

The invention relates to pigment- and/or filler-containing formulations, comprising one or more solids selected from the group of the pigments and fillers, and an emulsifier (EQ), which has the following formula: R.sup.1N(R.sup.2)(R.sup.3)(R.sup.4)X(EQ), where: R.sup.1 is a moiety that contains at least one aromatic group and at least one aliphatic group, has 15 to 40 carbon atoms, and contains at least one functional group selected from hydroxy groups, thiol groups, and primary or secondary amino groups and/or comprises at least one carbon-carbon multiple bond; R.sup.2, R.sup.3, and R.sup.4 are, independently of each other, identical or different aliphatic moieties having 1 to 14 carbon atoms; and X stands for the acid anion of an organic or inorganic acid HX. The invention further relates to coating agents comprising said formulations, the use of said formulations to produce electrocoats, and conductive substrates coated with said coating agent compositions.

Methods are provided for forming a coating on a surface of a substrate. The method may include: applying a negative charge to the surface of the substrate; electrophoretically depositing a slurry layer onto the surface of the substrate; and densifying the slurry layer on the surface of the substrate at a sintering temperature to form a sintered layer of the coating. The slurry layer may include a plurality of EBC material particles, a cationic polyelectrolyte, a plurality of polymeric binder particles, and a solvent. The plurality of EBC material particles may comprise barium strontium aluminosilicate (BSAS), mullite, silicon, rare earth compounds, or combinations thereof.

The invention relates to aqueous, cationically stabilized primary dispersions comprising dispersed polymer particles having a Z-average particle diameter of 5 to 500 nm and which are obtainable by emulsion polymerization of at least one olefinically unsaturated monomer (A). The emulsion polymerization takes place in the presence of one or more emulsifiers (EQ) having the following general formula: R.sup.1N.sup.?(R.sup.2)(R.sup.3)(R.sup.4)X.sup.?, where R.sup.1 is a moiety with 15 to 40 carbon atoms which contains at least one aromatic group and at least one aliphatic group, and which contains at least one functional group selected from hydroxyl groups, thiol groups, and primary or secondary amino groups, and/or has at least one carbon-carbon multiple bond, R.sup.2, R.sup.3, and R.sup.4, independently of one another, are the same or different aliphatic moieties containing 1 to 14 carbon atoms, and X stands for the acid anion of an organic or inorganic acid. The invention further relates to a method for producing the primary dispersions, and to coating agents which include the primary dispersions, and to the use of the primary dispersions for producing electrodeposition coatings, and also to conductive substrates coated with the coating compositions. The invention further relates to emulsifiers which are used for producing the primary dispersions according to the invention.

The present invention relates to an aqueous coating composition (A) having a pH in a range from 4.0 to 6.5 and comprising at least one cathodically depositable binder (A1), a total amount of at least 130 ppm of Bi, based on the total weight of (A), including at least 30 ppm of Bi in a form (A3) in solution in (A) and optionally at least 100 ppm of Bi in a form (A4) not in solution in (A), and at least one at least bidentate complexing agent (A5) suitable for complexing Bi, (A5) being a compound of the general formula (1) or an anion of this compound, for at least partly coating an electrically conductive substrate with an electrocoat material, to a method for producing (A), to the use of (A) for at least partly coating an electrically conductive substrate with an electrocoat material, to a corresponding coating method, to an at least partly coated substrate obtainable by this method, and to a method for setting and/or maintaining the concentration of component (A3) and/or optionally (A4) in the coating composition (A) during the coating method.

The invention relates to aqueous, cationically stabilized primary dispersions comprising dispersed polymer particles that have a Z-average particle diameter of 5 to 500 nm and are obtainable by emulsion polymerization of at least one olefinically unsaturated monomer (A), wherein the emulsion polymerization takes place in the presence of one or more emulsifiers (E) having the following general formula: R.sup.1(R.sup.2)(R.sup.3), where: R is a moiety that contains at least one aromatic group and at least one aliphatic group, has 15 to 40 carbon atoms, and contains at least one functional group selected from hydroxy groups, thiol groups, and primary or secondary amino groups and/or comprises at least one carbon-carbon multiple bond; and R.sup.1, R.sup.2, and R.sup.3 are, independently of each other, identical or different aliphatic moieties having 1 to 14 carbon atoms. The invention also relates to a method for producing the primary dispersions, coating agents comprising the primary dispersions, use of the primary dispersions to produce electrocoats, and conductive substrates that have been coated with the coating agent compositions.

The objective of the present invention is to provide a method for preparing a cationic electrodeposition coating composition that contains a bismuth compound and exhibits excellent coating material stability, curability, coating film appearance and the like. The present invention provides a method for preparing a cationic electrodeposition coating composition, which comprises a step for mixing a resin emulsion (i) and a pigment-dispersed paste, and wherein: the resin emulsion (i) contains an aminated resin (A) and a blocked isocyanate curing agent (B); the pigment-dispersed paste contains a bismuth mixture (C) that is obtained by mixing a bismuth compound (c1) and an organic acid (c2) in advance, a pigment-dispersed resin (D), an amine-modified epoxy resin emulsion (ii) that contains an amine-modified epoxy resin (E), and a pigment (F); the pigment-dispersed resin (D) has a hydroxyl number of 20-120 mgKOH/g; and the amine-modified epoxy resin (E) has a hydroxyl number of 150-650 mgKOH/g.

The present invention is directed towards an electrodepositable coating composition comprising a cationic electrodepositable binder; a phyllosilicate pigment; and a dispersing agent. Also disclosed are methods of making the electrodepositable coating composition, coatings derived therefrom, and substrates coated with the coatings derived from the electrodepositable coating composition.

A part assembly (100), comprising: an aluminium part (101); a magnesium part (102), the magnesium part (102) coated in a first coating (104); a bond (103), the bond (103) securing the aluminium part (101) to the coated magnesium part (114); wherein the aluminium part (101), the coated magnesium part (114) and the bond (103) are subjected to an electrophoresis coating process to coat the aluminium part (101) in a second coating (105). By subjecting the aluminium part (101), the coated magnesium part (114) and the bond (103) to an electrophoresis coating process to coat the aluminium part (101) in a second coating (105) this may provide a simpler manufacturing process.

Methods are provided for forming a coating on a surface of a substrate. The method may include: applying a negative charge to the surface of the substrate; electrophoretically depositing a slurry layer onto the surface of the substrate; and densifying the slurry layer on the surface of the substrate at a sintering temperature to form a sintered layer of the coating. The slurry layer may include a plurality of EBC material particles, a cationic polyelectrolyte, a plurality of polymeric binder particles, and a solvent. The plurality of EBC material particles may comprise barium strontium aluminosilicate (BSAS), mullite, silicon, rare earth compounds, or combinations thereof.