Abstract: Process for producing cationic epoxy resins carrying oxazolidine groups suitable as paint binders, and particularly paint binders for the formulation of cathodically depositable paints, wherein the epoxy resin is reacted with a hydroxy functional oxazolidine compound or with an oxazolidine compound carrying in the ring the structure ##STR1## in the presence of a monocarboxy compound. The presence of the monocarboxy compound permits the direct reaction or linkage of the epoxy resin with the oxazolidine compound without gelation; and, additionally, the monocarboxy compound favorably influences the film-forming characteristics of the binders.

Abstract: Hardener components which crosslink through transesterification comprising (A) a KNOEVENAGEL reaction product of a carbonyl compound and a compound such as the diester of malonic acid reacted in a MICHAEL-addition reaction with (B) a substituted oxazolidine carrying a secondary amino group, and where the reaction product of (A) and (B) is thereafter reacted through the methylene groups with (C) a polyisocyanate is described. The hardener components are particularly suitable for use in water-dilutable cationic paint binders.

Abstract: Cationic resins suitable as binders for stoving coating compositions, particularly for application by electro-deposition, and as mill base resins for grinding pigments and extenders; and a process for producing same is described. The resins are produced through reaction of a resinous compound carrying hydroxyl groups with a monoisocyanate which is totally or partially the reaction product of a diisocyanate and a tertiary amine which carries the ring structure ##STR1## wherein R and R.sub.x are a hydrogen atom or an alkyl radical or an aryl radical which may be substituted and wherein n is 2 or 3, the quantity of basic component being chosen in order that the cationic resin has an amine value of at least 35, and preferably of from 40 to 140 mg KOH/g.

Abstract: A process for producing improved crosslinking components for paint binders which can be crosslinked through transesterification is described. The process is characterized in that an ester of malonic or cyano-acetic acid or aceto-acetic acid is reacted in a KNOEVENAGEL-reaction with a carbonyl compound, preferably with formaldehyde, and the reaction products are polymerized, optionally utilizing free-radical initiators, to provide a polymer having a molecular weight of between about 300 and 6000. The crosslinking components prepared according to the invention provide an unsaponifiable base structure and permit the preparation of products with high functionality. The crosslinking components are preferably utilized in binder systems for cathodically depositable paints.

Abstract: Cationic heat-hardenable binders comprising polymers containing amine groups and a crosslinking component which is film-forming with the amine group containing polymer through transesterification at elevated temperatures are described. The binders which are water-dilutable upon protonization of the amine groups comprise(a) 60 to 95% by weight of a polymer having a hydroxyl value of from 40 to 450 mg KOH/g and an amine value of from 20 to 150 mg KOH/g, water-soluble or water-dilutable upon protonation of the basic groups, and(b) 5 to 40% by weight of a cross-linking component of the general formula ##STR1## n having a value of from 1 through 5, R.sub.1 being the moiety of a monoalcohol having from 1 to 8 C-atoms or of a polyol or of a polyamine or of a polyepoxy compound or of a polyisocyanate remaining after reaction with one or more carboxylic acid groups, andR.sub.2 being a straight chain or branched alkyl radical with from 1 to 8 C-atoms.

Abstract: Metal pigments stabilized against chemical influences particularly for use in aqueous paint systems by blending with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative of the general formulaP (O) R.sub.x (OH).sub.yor a derivative of a polyphosphoric acid of the general formula[P (O) R.sub.x (OH).sub.y-z O.sub.0.5 z ]n,wherein R is a radical linked to the phosphoric or polyphosphoric acid radical through a C--P-- or C--O--P--linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x+y equaling 3, z being the number of P--O--links stemming from a P-atom and being less than y, and n being the degree of polymerization.

Abstract: A process for producing phosphoric acid group containing polyester resins with substantially total linkage of the phosphoric acid or derivative thereof into the resin system. The process is characterized in that at least 0.1, preferably 0.2 to 1.5, moles/kg of phosphor in the form of a polyphosphoric acid and/or an acidic phosphoric acid ester of mono- or polyhydric alcohol based on the polyacid of the final product is esterified with the other reactants in a 40 to 80 percent by weight of solids containing solution of one or more diluents inert towards the raw materials employed. The reaction is carried to the substantial total linking of the phosphoric acid into the resin system and to an intrinsic viscosity of 3.0 to 25.0 ml/g (DMF, 20.degree. C.).

Abstract: Paint binders which are water soluble upon neutralization with bases comprising the reaction product of a polyepoxide containing reactive oxirane groups with phosphonic acids containing hydroxyl and/or vinyl groups. The paint binders when stoved at low temperatures have increased chemical resistance.

Abstract: Water-dilutable binders for air drying coating compositions, the content of the auxiliary organic solvent being below 15% of the binder solids are described. The binders comprise the partial condensation products of(A) 30-70% by weight of a film forming fatty acid modified alkyd resin intermediate with an acid value of between 30 and 200 mg KOH/g, an intrinsic viscosity .zeta..sub.A of from 4.5 to 8 ml/g and an oil length of from 5 to 60%, with(B) 70-30% by weight of a film forming fatty acid modified alkyd resin intermediate with an acid value of below 5 mg KOH/g, a hydroxyl value of from 50 to 300 mg KOH/g, an intrinsic viscosity .zeta..sub.B of from 8 to 12 ml/g and an oil length of from 5 to 60%,the ratio between the intrinsic viscosities .zeta.B/.zeta.A lying between 1.4 and 2.7. Solutions of the binders ready for application are obtained which have a high solids content.

Abstract: Paint binders and process of producing same water-soluble upon total or partial neutralization with inorganic or organic acids comprising the reaction product of an epoxy compound having at least two 1,2-epoxy groups with secondary oxazolidine amines and saturated or unsaturated carboxylic acids; said binders having a theoretical amine value of at least 35 mg KOH/g. The paint binders are particularly useful in paints formulated for cathodic deposition. Paints formulated with said binders exhibit good applicational characteristics including throwing power, and the cured films have good mechanical and chemical resistance.

Abstract: Cathodically depositable, aqueous coating compositions comprising the reaction product of (A) polycondensates having free hydroxyl groups with a hydroxyl number of at least 40 mg KOH/g, and an average maximum molecular weight of 5000; and (B) a compound having an average of from about 0.8 to 1.5 free isocyanate groups and at least one basic aliphatically bound nitrogen atom. Optionally, there can be included in the reaction product a compound having from about 0.8 to 1.5 free isocyanate groups and from 1 to 3 ethylenically unsaturated double bonds. The coating compositions cure at relatively low temperatures and relatively short curing times to provide films having excellent resistance to water, chemicals, and corrosion.

Abstract: A spray coating process for application of water-dilutable paint systems which includes spraying a water-dilutable paint through a main nozzle which atomizes the paint and simultaneously therewith spraying at least one additional material from at least one lateral ancillary nozzle into and/or around the paint stream from the main nozzle. The additional material can be water to control the water content of the paint film, or it can be an additive such as a leveling aid for the paint. The spraying of the additional material into and around the paint stream while it is being projected to the surface to be painted causes the material to locate primarily at the surface of the atomized paint droplets.

Abstract: Heat curable, cathodically depositable, aqueous coating compositions comprising an aqueous emulsion of 98 to 50 percent by weight, preferably 95 to 70 percent by weight, of one or more self-crosslinking cationic binders based on modified epoxy compounds, water-soluble upon partial or total neutralization with an inorganic or organic acid, and 2 to 50 percent by weight, preferably 5 to 30 percent by weight, of a di- and/or triurethane having the formula - ##STR1## wherein R represents an aromatic, cycloaliphatic, or aliphatic hydrocarbon radical; R.sub.1 stands for a hydroxyethyl(meth)acrylate or a hydroxypropyl(meth)acrylate radical; R.sub.2 is the radical of a saturated and/or unsaturated aliphatic monoalcohol with at least 6 carbon atoms and/or an alkyl or alkylene radical with at least 6 carbon atoms, and n is an integer of 1 or 2.

Abstract: Cathodically depositable, aqueous coating compositions comprising the reaction product of (A) diene polymers containing free hydroxyl groups with a hydroxyl number of at least 40 mg KOH/g and an average maximum molecular weight of 4000; and (B) a compound having an average of from about 0.8 to 1.5 free isocyanate groups and at least one basic aliphatically bound nitrogen atom. Optionally, there can be included in the reaction product a compound having from about 0.8 to 1.5 free isocyanate groups and from 1 to 3 ethylenically unsaturated double bonds. The coating compositions cure at relatively low temperatures and relatively short curing times to provide films having excellent resistance to water, chemicals, and corrosion.

Abstract: Auto-crosslinking, cathodically depositable binders which are water-dilutable upon neutralization comprising the reaction product of:(A) 2 moles of a polyepoxy compound with from 2 to 10 epoxy groups per molecule and an epoxy equivalent of from 100 to 1000;(B) 0.1 to 2.0 moles of a diamine, the nitrogen atoms being secondary-secondary or primary-tertiary;(C) from 1 to 10 moles of an alpha,beta-unsaturated monocarboxylic acid; and(D) from 0.5 to 10 moles of dialkanol amine and/or of a monoalkanol monoalkyl amine,whereby the weight ratios of the components are chosen in order that the sum of the epoxy-reactive hydrogen atoms of components (B) through (D) substantially correspond to the number of epoxy groups of component (A), and the binder contains from 0.5 to 2.5 basic nitrogen atoms and from 0.5 to 2.5 polymerizable double bonds per 1000 molecular weight units.

Abstract: Auto-crosslinkable, cathodically depositable aqueous coating compositions which are the reaction product of 2 moles of a diepoxide, 1 mole of a secondary-secondary or primary-tertiary diamine, 0-1 moles of a saturated and/or unsaturated monocarboxylic acid, and 2-1 moles of a secondary amine with optional subsequent partial or total reaction of the hydroxy groups of the reaction product with an alpha,beta-unsaturated monoisocyanate. The binders are rendered water-soluble by neutralization with inorganic and/or organic acids. The binders are capable of being neutralized with low levels of neutralizing acids to provide a component of a coating composition which will cure at low temperatures to give films having excellent surface qualities.

Abstract: Polymer dispersions characterized in that they contain N-methylol(meth)acrylamide groups, comprising30-65% by weight of methylmethacrylate,10-17% by weight of ethylacrylate,10-30% by weight of butylmethacrylate,5-20% by weight of styrene,3-10% by weight of N-methylol(meth)acrylamide,and containing as a coalescing agent from about 5 to 15% by weight, based on the dispersion, of a blend comprising20-65% by weight of a high boiling paint solvent such as 2,2,4-trimethylpentane-1,5-diol-monotrimethylacetate and80-35% by weight of ethylene glycol monoethyletheracetate, and/or ethylene glycol monobutyletheracetate,optionally in conjunction with basic varnishes based on cationic water-soluble acrylic copolymers, are described. The dispersions when used in coating compositions for coating wood surfaces provide a coating on wood having good mar resistance, hardness, and flexibility, while accentuating the wood grain and color.

Abstract: Heat-hardenable synthetic resins which are water soluble upon partial or total neutralization comprising the reaction products of epoxy groups containing unsaturated diene polymers and amine compounds, graft polymerized with alpha, beta-ethylenically unsaturated monomers which are free from epoxy reactive groups, the homopolymers of the monomers having a glass transition temperature of over 320.degree. K. A process of preparing the heat-hardenable resins is also described. The synthetic resins can be employed as binders for cathodically depositable aqueous coating compositions to provide coatings which will cure at relatively low temperatures and relatively short curing times to provide smooth and hard films having good resistance to water, chemicals, and corrosion; and which adhere well to the coated surface.

Abstract: Binder combinations for the formulation of cathodic paints comprising blends of epoxy resins as follows: (A) 40 to 80% by weight of reaction products of epoxy acrylates with basic monoisocyanates; (B) 5 to 30% by weight of reaction products of epoxy amine adducts with unsaturated monoisocyanates, and (C) an epoxy resin modified with a semi-ester of a dicarboxylic acid anhydride and an N-hydroxyalkyloxazolidin and an amine, rendered water soluble through neutralization of the basic groups. The binder combinations as defined have enhanced throwing power and improved stability of the paint tank.

Abstract: Binders water-dilutable upon neutralization with inorganic and/or organic acids comprising the reaction product of (A) a monoadduct of an N-hydroxyalkyloxazolidine and a diisocyanate with (B) a hydroxyl group containing polymer, the ratio of (A) and (B) adjusted to provide a final product with an amine value sufficient to provide water dilutability upon acid neutralization, and a process for the formation of the binders, is described. The binders, upon stoving, provide films with good resistance characteristics and have reduced losses.