Abstract: An electrodeposition coating composition comprising (a) a water-dispersible, electrically depositable binder resin and (b) water-insoluble, internally crosslinked polymer microparticles having a particle size from 0.01 to 2 microns, said polymer microparticles bearing on their surfaces physically adhered or covalently bound thereto an amphoionic group of the formula: ##STR1## wherein R represents an unsubstituted or substituted C.sub.1 -C.sub.6 alkylene or phenylene, A is --COOH or --SO.sub.3 H.

Abstract: An improvement is described for a process for the preparation of an epoxy cationic resin from an epoxy resin composition having terminal oxirane groups which includes the step of converting oxirane groups to cationic groups by reacting a nucleophile with at least some of the oxirane groups of the epoxy resin composition wherein an organic acid and water are added during some part of this conversion; wherein the improvement resides in using as the epoxy resin composition a blend of (I) at least one of (A) at least one epoxy-based resin prepared from a diglycidyl ether of a polyether polyol having an average epoxide equivalent weight of from about 350 to about 5,000; or (B) at least one epoxy-based cationic resin prepared from a diglycidyl ether of a polyether polyol having an average epoxide equivalent weight of from about 350 to about 5,000 which diglycidyl ether has been partially capped with a monofunctional capping agent; or (C) a combination of (A) and (B); and (II) at least one different epoxy-based resi

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: A non-autocrosslinking binder composition for water dilutable lacquers is described, containing from 95 to 50 parts by weight of a water dilutable poly(meth)acrylate resin containing amino and hydroxyl groups and from 5 to 50% by weight of crosslinking agents is described. An aqueous electrodip lacquer coating composition capable of being deposited at the cathode and its use for coating articles having an electrically conductive surface at the cathode are also described.

Abstract: Copolymers produced from 0.5-20% by weight mono-, bis- or trismethylolphenyl allyl ether (I) of formula: ##STR1## n being from 1 to 3, and from 80-99.5 % by weight ethylenic monomers, at least one being a (meth)acrylic monomer are useful in the preparation of coatings, particularly in the field of paints, varnishes, inks and adhesives. Radical polymerization is employed with different stages of polymerization.

Abstract: Water-dilutable paint binders based on acrylates for cathodically depositable paints particularly suited for the formulation of decorative single coats or pale primers are described. The binders are partial condensation products of from 60% to 90% by weight of a hydroxy and amino group containing acrylic copolymer, the basic groups of which were obtained through reaction of glycidyl groups with secondary amines, with 10% to 40% by weight of an oliogomeric or polymeric compound carrying CH-active ester groups, preferably malonic acid ester groups, capable of transesterification or transamidation. The paint films afford particularly good yellowing resistance, detergent resistance, and abrasion resistance.

Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea group carrying reaction products of modified phenols and epoxy resins as well as with the binders produced according to the process and their use in stoving paints, particularly in electrodeposition paints is described. The process is characterized in that either an aminoalkylation product of a phenol and a semi-blocked diisocyanate carrying an average of at least one secondary amino group, or a substituted urea prepared from a semi-blocked diisocyanate and an amine, which is further reacted with formaldehyde and a phenol, are reacted with an epoxy compound. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C., give films with excellent corrosion resistance and adhesion.

Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea and urethane group carrying reaction products of modified phenols and monoepoxy compounds as well as with the binders produced according to this process and their use in stoving paints, particularly electrodeposition paints are described. The process is characterized in that a substituted urea-phenol-formaldehyde condensate obtained through reaction of an aminoalkylation product of a phenol, carrying an average of at least one secondary amino group with a semi-blocked diisocyanate, or a substituted urea prepared from a semi-blocked diisocyanate and an amine and further reacted with formaldehyde and a phenol, is reacted with a monoepoxy compound, the free aliphatic hydroxy groups of the reaction product being reacted in a further reaction step with di- or polyisocyanates. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C.

Abstract: An electrodeposition coating composition comprising a fluorine-containing copolymer having an anionic functional group, a curing agent and water, said copolymer comprising:(a) 20 to 80% by mole of the structural unit of the formula (1):--CFX--CF.sub.2 -- (1)(b) 5 to 60% by mole of the structural unit of the formula (2): ##STR1## (c) 0 to 40% by mole of the structural unit of the formula (3): ##STR2## (d) 0 to 40% by mole of the structural unit of the formula (4): ##STR3## the total amount of the structural units (a), (b), (c) and (d) being 100% by mole. The composition of the invention can be baked to substrates at a low temperature in comparison with compositions containing conventional fluorine-containing copolymers, and the films obtained by electrodepositing the composition are excellent in gloss, weatherability, adhesion to the substrates, alkali resistance and smoothness.

Abstract: Water-compatible resins containing a residue of an aryl or cycloalkyl compound having a sufficiently bulky structure to raise the T.sub.g of a specified cured epoxy resin by more than 20.degree. C. The resins preferably are used in cathodic electrophoretically-depositable coating compositions.

Abstract: The invention relates to a process for coating an electrically conductive substrate, the said substrate being immersed in an aqueous bath based on a cationic synthetic resin binder which is at least in part neutralized with acids and contains amino and/or hydroxyl groups. The said bath contains a mixture of crosslinking agents as well as pigments, fillers, corrosion inhibitors, paint auxiliary substances, and, if appropriate, catalysts, as well as organic solvents in an amount of up to 15% by weight based on the total weight of the coating, the said substrate being cathodically connected. By the action of direct current, a film is deposited on the substrate, after which the said substrate is removed from the bath and the film is cured by stoving, the mixture of crosslinking agents comprising at least two crosslinking agents of different reactivities based on activated esters and/or polyisocyanates blocked by different blocking agents.

Abstract: An aqueous, cationically electrodepositable coating composition contains a ternary sulfonium or quaternary phosphonium group containing resin, an aminoplast or phenoplast crosslinking agent and a catalytic amount of a non-ionic ester of a sulfonic acid as latent acid catalyst to catalyze the reaction between the sulfonium or phosphonium group containing resin and the aminoplast crosslinking agent.

Abstract: The present invention is directed to polyisocyanates which have improved compatibility with polyester coreactants and improved solubility in apolar solvents, the polyisocyanates containing, based on solids,(a) about 15 to 85 wt. % of an isocyanurate group-containing polyisocyanate based on hexamethylene diisocynate and(b) about 15 to 85 wt. % of a biuret group-containing polyisocyanate based on hexamethylene diisocyanate.The present invention is additionally directed to two-component polyurethane coating compositions based on the above polyisocyanates and branched polyester polyols. Finally, the present invention is directed to a process for preparing the polyisocyanate.

Abstract: Disclosed is a micro gel particle having a cationic charge, which is electrodepositable. The micro gel particle is obatined in the form of aqueous dispersion. The micro gel particle dispersion is prepared by a process comprisingemulsifying in an aqueous medium a resin composition comprising(A) 100 parts by weight of a cationic film-forming aqueous resin, and(B) 10 to 250 parts by weight of a thermosetting crosslinking agent which is self-crosslinked or crosslinked with said aqueous resin (A) in terms of condensation or addition reaction;parts by weight being based on the solid content of the resin composition, andheating the resultant emulsion to above a crosslinkable temperature of said crosslinking agent (B).

Abstract: A process for producing self-crosslinking paint binders, water-soluble on protonation, based on the reaction product of aminoalkylation product carrying blocked isocyanate groups, NH-functional compounds, particularly of adducts of primary amines to diepoxy resins, and formaldehyde is described. The products produced according to the process are particularly suited for the formulation of high quality electrodeposition paints.

Abstract: Disclosed is a process in which a spherical electrophotographic toner containing a colorant and having a particle size suitable for the electrophotography is directly formed in the polymerization process for formation of a binder resin. If a reaction medium capable of dissolving a monomer but incapable of dissolving a formed polymer is used and polymerization is carried out in the presence of a radical polymerization initiator in the state where the monomer, the colorant and other additives are dissolved or dispersed in the reaction medium, an electrophotographic toner having a desired particle size is obtained. According to this process, the particle size of the colored resin is stably controlled to 1 to 30 .mu.m suitable for a toner in the polymerization process, and the particle size distribution is very sharp.

Abstract: Promoters for a crosslinking reaction involved in the curing of a system comprising crosslinkable polymers are bound to polymeric microparticles having a diameter of about 0.01 to 6 microns prepared by polymerizing a mixture of ethylenically unsaturated monomers. The microparticles carrying the crosslinking reaction promoter may be incorporated to coating compositions, printing inks, sealants, adhesives and other polymeric products in place of conventional crosslinking reaction promoters.

Abstract: An electrodeposition resinous paint composition comprising (a) a modified alkyd resin, (b) a melamine resin, (c) a water-soluble silicone resin and (d) an inorganic filler, in which these components (a), (b), (c) and (d) are contained in the following ratios by weight:[(a)/[(a)+(b)]]=0.4-0.9;[(c)/[(a)+(b)]]=0.01-0.1;and[(d)/[(a)+(b)+(c)]]=0.1-1.0.

Abstract: Binders for cathodic electrocoating which are based on polyadducts/polycondensates which carry basic nitrogen groups and are rendered water-dilutable by protonation with an acid, and one or more crosslinkng agents for these polyadducts/polycondensates, and their use.These binders essentially consist of a mixture of(A) from 50 to 90% by weight of a polyadduct/polycondensate which carries basic nitrogen groups and is obtainable by reacting(a) an adduct of a secondary amine and a polyepoxide compound, the adduct still containing free epoxide groups, with(b) a condensate which contains primary amino groups and is obtained from a primary diamine of not less than 4 carbon atoms and one or more mono- and/or dicarboxylic acids, one or more primary amino groups of the condensate (b) being used per free epoxide group of the adduct (a), and(B) from 10 to 50% by weight of a crosslinking agent which does not react with component (A) at room temperature but reacts with the latter at elevated temperatures with crosslinking.

Abstract: The present invention is directed to improved methods for increasing the effective contact area of electrodes during the electrocoating process. One preferred embodiment of such methods comprises the first step of coating a non-conductive workpiece with a conductive primer. Next, the areas surrounding the respective contact areas for the electrocoat electrodes are coated with a contact area coating composition having greater electroconductivity then that of the conductive primer. Next, the coating electrodes are fixed on the contact areas for electrocoating. The workpiece is then submerged into an electrocoating bath, and finally sufficient electrical change is applied to the prepared workpiece to electrocoat the workpiece.

Abstract: Aqueous thermosetting cationic electrocoating compositions are disclosed in which an amine-functional cationic polymer is dispersed in water with the aid of an acid, a curing agent being added if the polymer is not self-curing, and there is added from 1% to 30% of the polymer content of the composition of an oxirane-free epoxy phosphate. This epoxy phosphate is produced by slowly and incrementally adding a resinous polyepoxide to a solvent solution containing from 0.05 to 0.9 mole of orthophosphoric acid per oxirane equivalent in said polyepoxide together with sufficient water to hydrolyze all of the oxirane functionality which is not consumed by the orthophosphoric acid. When the epoxy phosphate is made in the manner set forth, the salt spray resistance of electrodeposited cured films is improved.

Abstract: A cathodic electrodeposition coating composition which comprises:(A) 100 parts by weight of an amine-unsaturated carboxylic acid adduct of epoxidized polybutadiene having a number average molecular weight of from 500 to 10,000 and containing from 70 to 200 mmol of a tertiary amino group, from 20 to 200 mmol of an .alpha.,.beta.-unsaturated monocarboxylate group and from 200 to 2,000 mmol of a carbon-carbon double bond, per 100 g of the resin;(B) from 20 to 200 parts by weight of an addition reaction product of (a) 1 mol of an epoxy resin containing at least two epoxy groups per molecule, and (b) from 1.5 to 2.0 mol of an .alpha.,.beta.-unsaturated monocarboxylic acid;(C) from 5 to 50 parts by weight of an addition reaction product of (a) 1 mol of an epoxy resin containing at least two epoxy groups per molecule, and (b) a mixture of from 0.5 to 1.5 mol of an .alpha., .beta.-unsaturated monocarboxylic acid and from 0.5 to 1.

Abstract: A composition for electrodeposition paint, comprising (a) a water-dispersible and electrophoretic fluoropolymer obtained by neutralizing with a basic compound at least a part of carboxyl groups of a carboxyl and hydroxyl group-containing fluoropolymer having an acid value of from 5 to 30 and a OH value of from 30 to 150 and (b) an aminoplast, which are dispersed in an aqueous medium in a weight ratio of component (a)/component (b) of from 50/50 to 97/3.

Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea and urethane group carrying reaction products of modified phenols and monoepoxy compounds as well as with the binders produced according to this process and their use in stoving paints, particularly electrodeposition paints are described. The process is characterized in that a substituted urea-phenol-formaldehyde condensate obtained through reaction of an aminoalkylation product of a phenol, carrying an average of at least one secondary amino group with a semi-blocked diisocyanate, or a substituted urea prepared from a semi-blocked diisocyanate and an amine and further reacted with formaldehyde and a phenol, is reacted with a monoepoxy compound, the free aliphatic hydroxy groups of the reaction product being reacted in a further reaction step with di- or polyisocyanates. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C.

Abstract: A process for producing self-crosslinking cationic paint binders, water-dilutable upon protonation, on the basis of urea group carrying reaction products of modified phenols and epoxy resins as well as with the binders produced according to the process and their use in stoving paints, particularly in electrodeposition paints is described. The process is characterized in that either an aminoalkylation product of a phenol and a semi-blocked diisocyanate carrying an average of at least one secondary amino group, or a substituted urea prepared from a semi-blocked diisocyanate and an amine, which is further reacted with formaldehyde and a phenol, are reacted with an epoxy compound. The paints formulated with these products, at stoving temperatures of from 150.degree. to 170.degree. C., give films with excellent corrosion resistance and adhesion.

Abstract: A method of cationic electrodeposition, electrocoated articles and novel electrocoating compositions are disclosed. The compositions comprise a cationic resin containing blocked isocyanate functionality and are capable of being electrodeposited over rough steel and producing extremely smooth films upon curing.

Abstract: Ungelled reaction products of polyoxyalkylenepolyamies with monoepoxides and optionally with a polyfunctional material which contains groups capable of reacting with amino and/or hydroxyl groups are disclosed. The reaction products can be neutralized with acid and dispersed in aqueous medium where they are useful as additives for cationic electrodeposition baths to improve surface appearance of electrodeposited coatings.

Abstract: The preparation of water-thinnable thermosetting resin binder compositions for coatings is described wherein a polyglycidyl ether prepared by reacting a multifunctional polyglycidyl ether with a monofunctional phenol is reacted with a dicarboxylic acid in the presence of an esterification catalyst.

Abstract: The blocked isocyanate crosslinker commonly used in conventional electrocoat compositions are difficult to incorporate satisfactorily into latex paint compositions for such application. An improved homogenized feed process for incorporating such water insoluble crosslinking agents into the latex particle during emulsion polymerization of reactive (hydroxy functional) vinyl monomers provides thermosetting latex of high cleanliness. The invention pertains to an improved cationic, amine-stabilized electrocoating composition and process.

Abstract: The invention relates to water-dispersible binders for cationic electro-dip paints which are reaction products of(A) low molecular weight epoxy resins containing aromatic groups and having an epoxide equivalent weight under 375,(B) aliphatic and/or alicyclic poly-functional alcohols and/or carboxylic acids having a molecular weight under 350,(C) elasticized polyphenols having a molecular weight over 350 and(D) primary and/or secondary amines and/or their salts, the reaction product of A and B having a content of aromatic groups, calculated as phenylene group, of 10-45%.

Abstract: There is herein provided an aqueous dispersion of a resinous composition which is water-solubilized with a metal compound such as a metal salt, an example of which is zinc acetate.

Abstract: The preparation of water-thinnable thermosetting resin binder compositions for coatings is described wherein a polyglycidyl ether prepared by reacting a multifunctional polyglycidyl ether with a monofunctional phenol is reacted with a dicarboxylic acid in the presence of an etherification catalyst.

Abstract: A cathodic electrodepositable resin particularly adapted for use as a grind resin to form a pigment paste. The resin is the reaction product of an aliphatic polyepoxide and a polyether primary amine. The resin composition has anti-foaming properties, is stable in the aqueous dispersion, and contributes to high film build.

Abstract: Aminoplast curable cationic coating compositions are disclosed. The coating compositions contain an onium salt group-containing polymer and an aminoplast curing agent which has at least one group of the structure: ##STR1## wherein R.sub.1 is carbon derived from an aldehyde or a ketone.

Abstract: The disclosed invention involves water-dispersible binding agents for cationic electrodeposition coatings and a method for making them, the binding agents are the reaction product of (A) epoxy resins having a molecular weight greater than about 350; (B) polyfunctional, alcohols, carboxylic acids and/or SH-compounds having a molecular weight between about 500-5000 and (C) aminoalcohols with at least one protected primary or tertiary nitrogen atom.

Abstract: Heat-curable surface-coating agents useful not only for application as solvent-containing finishes and for powder coating but also, in their protonated form, for cathodic electrocoating contain, as a binder, a mixture of (A) a polyadduct, polycondensate or other polymer having an average molecular weight M.sub.n of from 500 to 10,000 and, per molecule, on average two or more OH and/or primary and/or secondary amino groups and (B) a reaction product of (a) one or more polyisocyanates, (b) one or more secondary monoamines and, if appropriate, (c) one or more polyalcohols having two or more hydroxyl groups.

Abstract: A reactive diluent for use in an amine-containing epoxy resin composition. The reactive diluent comprises a soft, blocked isocyanate crosslinking agent. This reactive diluent is incorporated into the resin in addition to the primary crosslinking agent. The use of the reactive diluent eliminates or substantially reduces the need for volatile organic coalescent solvents and produces smooth, durable corrosion resistant coatings.

Abstract: Aqueous electrodip lacquer coating compound capable of being deposited cathodically, containing, as synthetic resin binder,(A) 55 to 95% by weight of synthetic resin binder which can be rendered water soluble by protonation with acid and(B) 5 to 45% by weight of a cross-linking agent containing ester groups capable of transesterification and/or transamidation and having terminal ester groups which are substantially stable in a neutral aqueous medium but capable of reacting with synthetic resin binder (A) in an alkaline medium at temperatures above 140.degree. C., component (A) containing in its molecule at least one molecule-enlarging diamine of the formula ##STR1## wherein the symbol Y stands for H or C.sub.m H.sub.2m+1 (m=1 to 8) or an organic group used for defunctionalization, which is formed by the reaction of the primary amino group with monoepoxides, and the symbol X represents a molecular grouping having at least one amide and/or urea group.

Abstract: Aqueous electrodip lacquer coating compound capable of being deposited cathodically, containing, as synthetic resin binder,(A) 55 to 95% by weight of synthetic resin binder which can be rendered water soluble by protonation with acid and(B) 5 to 45% by weight of a cross-linking agent containing ester groups capable of transesterification and/or transamidation and having terminal ester groups which are substantially stable in a neutral aqueous medium but capable of reacting with synthetic resin binder (A) in an alkaline medium at temperatures above 140.degree. C., component (A) containing in its molecule at least one molecule-enlarging diamine of the formula ##STR1## wherein the symbol Y stands for H or C.sub.m H.sub.2m+1 (m=1 to 8) or an organic group used for defunctionalization, which is formed by the reaction of the primary amino group with monoepoxides, and the symbol X represents a molecular grouping having at least one amide and/or urea group.

Abstract: Binders useful for cathodic electrocoating are water-dilutable on addition of acid and comprise a mixture of(A) a polyadduct which carries basic nitrogen groups and contains groups of the formula (I) and/or (II) ##STR1## where R.sup.1 and R.sup.2 are hydrogen or methyl and R.sup.3 and R.sup.4 are alkyl or hydroxyalkyl or together are a 5- or 6-membered ring, and(B) a reaction product of a polyisocyanate and an olefinically unsaturated amine which carries a secondary amino group and a methacrylamide or methacrylate group.

Abstract: The present invention is directed to polyglycidyl ethers having, on average, n epoxy groups per molecule, where 1<n.ltoreq.2, which comprise the reaction products of multifunctional polyglycidyl ethers having, on average, x epoxy groups per molecule, where x>2, with (x-n) mol of monofunctional phenols per mol of the multifunctional polyglycidyl ether and to a process for their preparation and their use in preparing thermosetting coating compositions, particularly for use in electrodeposition coating of articles.

Abstract: A cathode-depositing electrodeposition coating composition comprising an aqueous solution or dispersion containing(A) a reaction product of (1) epoxidized diene polymer, (2) an amine and optionally, (3) polymerizable unsaturated aliphatic acid;(B) a reaction product of bisphenol epoxy resin and a polymerizable aliphatic acid;(C) a blocked polyisocyanate compound; and(D) manganese dioxide or an organic salt of manganese, cobalt or copper.The composition gives a coating film having excellent properties when electrodepositing and baking at a relatively low baking temperature.

Abstract: Mechanical stability and coating characteristics of structurally cation-active, film-forming latex, especially useful in electrodeposition coatings can be improved by the addition of small stabilizing amounts of linear cationic amine-modified epoxy resin having tertiary amine functionality and base number in the range of 30-500. Such stabilized latex remain substantially non-agglomerated even after being subjected to pumping and shear. The improved latex and process circumvent the purification steps, i.e. ion exchange and also ultrafiltration, often required treatments to render latex compositions suitable for electrodeposition coatings. The thickness of the film electrodeposited on the metal can be controlled by proper selection of the stabilizer amount and/or system voltage.

Abstract: Novel coating compositions are disclosed which comprise aqueous dispersions of polyamine resins in the form of their acid salts along with azetidinedione crosslinking agents and other optional adjuvants.The compositions give rise to improved methods for the electrodeposition of heat-curable films on substrates.The compositions and methods find particular utility in the cathodic deposition of coatings and films on automotive parts and household appliances.

Abstract: Heat-curable surface-coating agents useful not only for application as solvent-containing finishes and for powder coating but also, in their protonated form, for cathodic electrocoating contain, as a binder, a mixture of (A) a polyadduct, polycondensate or other polymer having an average molecular weight M.sub.n of from 500 to 10,000 and, per molecule, on average two or more OH and/or primary and/or secondary amino groups and (B) a reaction product of (a) one or more polyisocyanates, (b) one or more secondary monoamines and, if appropriate, (c) one or more polyalcohols having two or more hydroxyl groups.

Abstract: Cathodic electrodepositable resin compositions particularly adapted for use as film forming compositions in cathodic electrodeposition processes. The resin is the reaction product of a modified epoxy formed by reacting a polyepoxide with a water soluble or water miscible polyol, an excess of polyamine, and an aliphatic monoepoxide. The resin, when combined with a cross-linking agent and solubilized in an aqueous electrodeposition bath, is capable of depositing high build coatings in a short period of time with a low cross-linking temperature in a cathodic electrodeposition process. The resin compositions are salted with an acid and used as components of aqueous cathodic electrodeposition baths.

Abstract: Cathodic electrodepositable resin compositions particularly adapted for use as film forming compositions in cathodic electrodeposition processes. The resin is the reaction product of a modified epoxy formed by reacting a polyepoxide with a water soluble or water miscible polyol, an excess of polyamine, and a fatty acid. The resin, when combined with a cross-linking agent and solubilized in an aqueous electrodeposition bath, is capable of depositing high build coatings in a short period of time with a low cross-linking temperature in a cathodic electrodeposition process. The resin compositions are salted with an acid and used as components of aqueous cathodic electrodeposition baths.

Abstract: Cathodically depositable electrodeposition paint binders comprising the reaction product of an epoxy resin with at least two epoxy groups with amines carrying primary amino groups and, optionally, with a carboxylic acid compound to provide an epoxy resin-amino adduct which is then reacted with a phenol and formaldehyde. The binders have excellent corrosion resistance and crosslink to provide coating films at relatively low stoving temperatures without splitting off of substances harmful to the environment.

Abstract: The present invention relates to a process for the preparation of urea condensates and to their use.To prepare these urea condensates, a primary di and/or polyamine is reacted with urea, a secondary monoamine and if appropriate a polyalcohol at elevated temperatures in the presence or absence of catalysts, and the ammonia formed is separated off.These urea condensates are suitable as binder components in thermosetting surface coatings.

Abstract: The invention relates to cathodically electrodepositable coating compositions comprising an aqueous dispersion of self-crosslinkable resin. The self-crosslinkable resin is amine and epoxide functional and prepared by reacting epoxide resin with fatty amidopolyamine at about room temperature so as to form a partially crosslinked resin, wherein at least about 50 percent of the amine groups have been neutralized with a water soluble acid. The partially crosslinked resin can be deposited from the bath onto a metal substrate and cured at elevated temperatures to form a coating offering excellent corrosion protection and having excellent adhesion to the substrate.