Abstract: Aqueous electrophoretic lacquer capable of being deposited cataphoretically, containing A) an aqueous dispersion of cationically modified polyurethane (meth)acrylates (a1) with terminal, ethylenically unsaturated (meth)acrylic double bonds, and reactive thinner (a2) with at least two ethylenically unsaturated (meth)acrylic double bonds, the (meth)acrylic double bonds of the mixture of (a1) and (a2) corresponding to a bromine number of 20 to 150 g bromine/100 g solids, and B) photoinitiators and optionally free-radical initiators capable of thermal activation, the terminal, ethylenically unsaturated (meth)acrylic double bonds of the polyurethane (meth)acrylates being bonded with the anionically modified polyurethane prepolymer via urethane, urea, amide or ester groups, and optionally conventional auxiliary substances and additives, pigments and/or fillers.

Abstract: Nanoparticle-modified binders obtainable by reacting binders produced in the presence of nanoparticles provided with a reactive functionality, said binders having a reactive functionality complementary to the reactive functionality of the nanoparticles, with the nanoparticles, production thereof, coating compositions containing them and use thereof.

Abstract: Aqueous electrophoretic lacquer capable of being deposited cataphoretically, containing

Abstract: Process for preparation powder coating formulations by pressure release of a composition comprising a low molecular mass inert compound, with release of the low molecular mass inert compound, in which process one or more base resins and one or more hardeners for the base resins, or one or more self-curing base resins, and, if desired, further customary coatings components, are converted together or separately into a flowable form by heating, the low molecular mass inert compound is dissolved under pressure at least in one of the base resin or hardener components employed, either before these components are combined with the other components or in the already prepared mixture, the overall mixture is homogenized, and then the mixture of all components is released from pressure, with cooling.

Abstract: Aqueous, anodically precipitable electrodeposition lacquer, containing A) an aqueous dispersion consisting of anionically modified polyurethane (meth)acrylates (a1) having terminal, ethylenically unsaturated (meth)acrylic double bonds, and reactive thinners (a2) having at least two ethylenically unsaturated (meth)acrylic double bonds, whereby the (meth)acrylic double bonds from the mixture comprising (a1) and (a2) correspond to a bromine number of 20 to 150 g bromine/100 g solids, and B) optionally photo-initiators and/or optionally thermally activable radical initiators, whereby the terminal ethylenically unsaturated (meth)acrylic double bonds from the polyurethane (meth)acrylates are bonded to the anionically modified polyurethane prepolymer via urethane, urea, amide or ester groups, and optionally conventional auxiliary substances and additives, pigments and/or fillers.

Abstract: The invention concerns a process for preparing coating powder compositions in which one or a plurality of base resins and one or a plurality of hardeners, each of which is in solid form, is dissolved with a low-molecular compound above its critical pressure and critical temperature. This low-molecular compound is inert with respect to the base resins and hardeners and is in gaseous form under normal operating conditions with respect to pressure and temperature. The pressure of the resultant solution is then reduced, for example, by spraying. The resultant coating powder composition can be sprayed directly onto a substrate to be coated. Coating powders can also be recycled according to the process of the invention.

Abstract: A process is described for recovering the overspray of aqueous coating agents during spray application in spray booths in which aqueous circulating liquid is circulated for the purpose of collecting the overspray. The overspray material is continuously or discontinuously extracted from the circulating liquid in an electrocoagulation bath, a higher concentration of overspray being maintained in the electrocoagulation bath than in the circulating liquid of the spray booth as a result of ultrafiltration.

Abstract: Continuous process for recovering the overspray of aqueous coating agents during spray application by collecting it in an aqueous washing liquid which is continuously circulated in a circuit (A) to the spray booth, where the solids concentration of said washing liquid is maintained within the range of 1-1.5 wt.-%, whereby a part of the washing liquid containing overspray is fed to a first ultrafiltration circuit (B) in which the solids concentration of the circulating liquid is maintained within a range of 8-15 wt.-%, a part of the circulating liquid from ultrafiltration circuit (B) being fed to a further ultrafiltration circuit (C) in which the solids concentration of the circulating liquid is maintained approximately constant within a range between 35 wt.

Abstract: A method or producing multilayer coatings, more particularly for lacquering of motor vehicles in which at least three immediately adjacent layers with alternating effective charge of the used binders are applied. The coating agents can be made polar e.g. by using resins containing ionic groups.

Abstract: Process for multilayer-lacquering of a substrate in which the outermost layer is prepared by use of a lacquer containing one or several cationic binding agents. It is possible to apply top coat and clear lacquer films based on cationic binding agents.

Abstract: Aqueous cathodic electrodeposition lacquer coating compositions are provided which comprise (A) certain water soluble synthetic resin binders containing amino groups; (B) crosslinking reagents which react with resin (A), and (C) certain soluble or insoluble transesterification catalysts for the crosslinking reagents. Methods of forming baked finish coatings which are cathodically deposited on electrically conductive surfaces using the lacquer coatings are also disclosed.

Abstract: An aqueous electrophoretic coating material, which can be deposited at the cathode and contains(A) 90 to 50% by weight, based on the total portion of synthetic resin vehicle, of one or several polycondensation, polymerization and/or poly-addition resins, the resin or, in the event that several resins are present, their mixture(a) having a number average molecular weight (Mn) of 700 to 10,000(b) having 1.2.times.10.sup.23 to 21.7.times.10.sup.23 lateral or terminal double bonds per 1,000 g, corresponding to a hydrogenation iodine number of 5 to 90,(c) optionally containing primary and/or secondary hydroxyl groups, corresponding to a hydroxyl number of 0 to 450 mg KOH/g of resin, and(d) tertiary amino groups corresponding to an amine number of 30 to 450 mg KOH/g of resin.

Abstract: An aqueous electrodeposition lacquer coating composition containing as binder(A) from 95 to 50% by weight of an organic externally crosslinkable synthetic resin binder containing primary and/or secondary hydroxyl groups and primary, secondary and/or tertiary amino groups and(B) from 5 to 50% by weight of a crosslinking agent mixture of(a) blocked isocyanates and(b) transesterifiable crosslinking agents containing more than two ester groups and(c) optionally up to 30% by weight of hydroxyfunctional resins.The invention also relates to the use of this electrodeposition coating composition for coating objects, particularly objects having electrically conductive surfaces.

Abstract: A non-autocrosslinking binder composition for water-dilutable lacquers containing 1 to 99% by weight of a hydroxyl group-containing and amino group-containing epoxide resin and 99 to 1% by weight of an amino groupcontaining synthetic resin binder prepared from free radically polymerizable monomers is described. Aqueous electrodip lacquer coatings containing this binder composition and capable of being deposited at the cathode and their use for coating articles having an electrically conductive surface at the cathode are also described.

Abstract: Process for producing storable concentrates for producing paints containing water, undissolved, finely divided, as well as dissolved synthetic resins as paint binders, pigments, optionally paint additives and organic solvents by wet grinding in several stages, wherein(a) in a first grinding stage the undissolved synthetic resins, whereof at least 80% by weight are present with a particle size between 500 .mu.m and 20 mm, mixed with water, the solids content representing 30 to 70% by weight, based on the total mixture quantity, as well as 0 to 60% by weight of dissolved ionic synthetic resins (solids) are ground to a particle size of less than 200 .mu.m and preferably less than 100 .mu.m, and(b) 40 to 100% by weight of the dissolved ionic synthetic resins (solids) and pigments are added and the mixture is ground in a second grinding stage until 95% of all the particles have a particle size of less than 15 .mu.m.

Abstract: The invention relates to a cathodically depositable aqueous electro-dip lacquer coating composition containing as synthetic resin binder(A) from 50 to 99% by weight, based on the total quantity of synthetic resin binder, of one or more amino-1,2-epoxy resins, the amino-1,2-epoxy resin or--where several amino-1,2-epoxy resins are present--the mixture of amino-1,2-epoxy resins(a) having an average molecular weight (Mn) of from 700 to 10,000,(b) containing per 1000 molecular weight units from 0.2 to 3.6 lateral or terminal ethylenic double bonds corresponding to a hydrogenation iodine number of from 5 to 90,(c) containing primary and/or secondary alcoholic hydroxyl groups corresponding to a hydroxyl number of from 30 to 450 and(d) having an amine number of from 30 to 150,(B) from 1 to 50% by weight of a substantially non-acid polyester of a polycarboxylic acid containing at least two terminal or lateral, saturated and/or unsaturated .beta.