Abstract: The invention relates to water-dispersible binders for cationic electrocoating finishes, which binders are reaction products of(A) low molecular weight epoxide resins containing aromatic groups and having an epoxide equivalent weight of below 375,(B) aliphatic and/or alicyclic polyfunctional alcohols and/or carboxylic acids having a molecular weight of below 350,(C) if appropriate up to 60% by weight, relative to the total binder, of polyfunctional alcohols, carboxylic acids and/or SH compounds having a molecular weight of 500-5,000 and(D) primary, secondary and/or tertiary amines and/or salts thereof or a sulfide/acid mixture or a phosphine/acid mixture, the reaction product of A and B containing 10-45% of aromatic groups, calculated as the phenylene group. By means of the binders, a higher layer thickness is obtained in electrocoating.

Abstract: Novel formulations which contain (a) one or more azo pigments based on coupling products of aromatic monoamines or 4,4'-diaminodiphenyls with acetoacetarylides, 1-arylpyrazolones, 3-hydroxy-2-naphthoic acid derivatives or .beta.-naphthol and (b) one or more dyes of the formulaQ--(X).sub.nwhere F is an n-valent radical of a monoazo dye, of a disazo dye or of a quinophthalone, n is 1, 2, 3 or 4 and X is a group of the formula ##STR1## where R.sup.1 and R.sup.2 are each hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is C.sub.1 -C.sub.4 -alkyl or hydroxy-C.sub.2 -C.sub.4 -alkyl and A.sup..crclbar. is one equivalent of an anion.The pigments present in the formulations exhibit improved tinctorial, rheological and printing properties when the formulations are used in printing inks.

Abstract: A synthetic resin carrying basic nitrogen groups, its preparation, coating materials prepared from this resin, and a process for cathodic electrocoating.This synthetic resin is obtained by reacting(A) an epoxy resin which(B) a diketimine of a diprimary amineand, if required,(C) with a secondary amine, which may additionally contain a tertiary amino group, with a ketimine of a primary monoamine and/or with a ketimine of a primary/tertiary diamine,a diketimine obtained from(B.sub.1) a ketone and(B.sub.2) a branched aliphatic diprimary diamine of 5 to 9 carbon atoms and/or(B.sub.3) one or more diaminodiamides which are obtained by condensation of 2 moles of diamine (B.sub.2) and 1 mole of a dicarboxylic acidbeing employed as component (B).After protonation with an acid, this synthetic resin is useful as a binder for cathodic electrocoating.

Abstract: A novel modified diarylide pigment contains (a) a pigment which is composed of a tetrazotized benzidine, coupled to an acetoacetarylide and/or a 1-phenyl-3-methylpyrazole-5-one, and (b) a water-soluble component obtained from a symmetric or asymmetric coupling product of a tetrazotized 4,4'-diamino-2,2'-stilbenedisulfonic acid and an acetoacetarylide and/or a 1-phenyl-3-methyl-5-pyrazolone. The novel pigments possess very good color strength, very good gloss characteristics and very good transparency, and exhibit improved printing characteristics, particularly in offset printing inks.

Abstract: The invention relates to a coating composition for the preparation of the base coat of a multilayer enamel consisting of at least one base and one transparent protective coat, the said coating composition containing binders based on organic resins, metallic pigments, organic solvents and, if appropriate, other pigments as well as customary additives and auxiliaries. The coating composition contains, as binders, (A) polyurethane elastomers and/or polyurea elastomers, (B) polyesters and (C) polycondensates partially etherified with monoalcohols and consisting of melamine, benzoguanamine and/or urea with formaldehyde. The invention further relates to a process for the preparation of coatings using the coating composition, and to a substrate coated with a multilayer enamel.

Abstract: An improved and substantially contamination free electro-immersion finish is provided on an electrically conductive substrate such as a motor vehicle body. An immersion tank holds an aqueous liquid containing an electrophoretically precipitable resin. The substrate to be coated is immersed in the liquid and transported through the tank. The bath liquid in the lower region of the tank is circulated parallel to the direction of transport of the substrate. The bath liquid in the upper region is circulated opposite to the direction of transport of the substrate. The bath liquid may be recirculated by removing the liquid from the tank at the end of the tank where the substrate is removed from the tank. The bath liquid may be purified by filter units prior to being returned to the tank. A separator, such as a cyclone separator, may be disposed in the liquid recirculation conduit ahead of the filtration units.

Abstract: Coating bath and method for cataphoretic coating of metallic iron surfaces from aqueous solutions and/or aqueous dispersions of salts of cationic film-forming agents. An additional content of metallic ions from metallic salts is dissolved in the coating bath, the potential of which in the electrolytic voltage series of the cations is higher than the potential of the iron metal surfaces.

Abstract: Filaments or filament bundles, which are conveyed by a heated gas, are crimped by treating them in a preheat chamber and crimping them in an elongate chamber from which the heated gas medium issues through longitudinal slits. A stream of cold gas is made to impinge on the outside of the lower one-third of the elongate chamber without allowing significant amounts of this cold gas to enter the said chamber. The resulting filaments or filament bundles have very good dyeing characteristics.

Abstract: Improved film-forming organic resin plant aqueous binder replenishment concentrated compositions adapted for dispersing in an aqueous electrocoating bath containing sufficient additional water-soluble amino compound to impart anionic polyelectrolyte behavior in the bath to the resin in the binder concentrate compositions, the binder concentrate compositions comprising:40-70 percent by weight of cyclized rubber in 60-30 percent by weight of a binder mixture wherein the binder mixture comprises:I. about 10-50 percent by weight of a non-heat reactive phenol-aldehyde resin; andIi. about 50-90 percent by weight of a copolymer, said copolymer comprising:A. about 50-85 percent by weight of an ester of methacrylic acid or acrylic acid with an alcohol having 1-10 carbon atoms;B. about 5-20 percent by weight of drying oils or drying oil fatty acids containing olefinically unsaturated fatty acids;C. about 5-15 percent by weight of an .alpha.,.beta.-olefinically unsaturated carboxylic acid having 3-5 carbon atoms;D.

Abstract: Cured, opaque coatings with high hiding power are produced on a substrate from a normally transparent and radiation transmitting unsaturated polyester paste filler composition containing customary additives, curing catalysts and optionally fillers of low hiding power and non-reactive solvents and/or plasticizers wherein the filler composition has a weight ratio of unsaturated polyester to the sum of copolymerizable monomers and optionally non-reactive solvents and plasticizers of from about 10 : 12 to 10 : 40, preferably from about 10 to 15. The unsaturated polyester filler composition may further have up to 95 percent by weight of the copolymerizable monomers replaced by the non-reactive solvents and/or plasticizers. The composition may be cured by UV rays, sunlight or other ionizing radiation.

Abstract: Opaque coatings or films having a high covering capacity produced from coating compositions containing synthetic resins, fillers, solvents, common catalysts, sensitizers, additives and auxiliary agents, characterized in that radiation permeable mixtures of coating compositions are used containing the following components:A. 14 - 20 parts by weight, preferably 15 - 18 parts by weight, photosensitized light curing condensation resins having double bond values of 0.180 to 0.450;B. 55 - 75 parts by weight, preferably 65 - 70 parts by weight, of fillers having a low covering capacity;C. 0.5 - 10 parts by weight, preferably 1 - 6 parts by weight, of film forming cellulose derivatives or mixed polymerizates of vinyl chloride with other monomers which are compatible with A and D; andD.

Abstract: Acid-extractable cadmium in yellow, orange, or red cadmium pigments is reduced sharply without loss of tinctorial strength and other desirable pigment properties by suspending the pigment powder in water and adding approximately stoichiometric amounts of tin ions, preferably quadrivalent tin ions and sulfide ions, and recovering the solids from the mixture.