Abstract: The invention discloses crosslinking components for hydroxy and/or primary and/or secondary amine groups containing cationic resins which can be used as binders for stoving paints, particularly for cathodically depositable electrodeposition paints. The crosslinking components are obtained through partial transesterification of transamidation of oligomeric KNOEVENAGEL-reaction products of C-H-active esters and carbonyl compounds with polyols or amines. The products can also be obtained through partial transesterification or transamidation of the C-H-active esters and subsequent KNOEVENAGEL-reaction.

Abstract: Cationic water-dilutable binders which are particularly useful in cathodically depositable coating compositions, which are crosslinked with polyisocyanate compounds, which are partially or totally blocked with enamines of C-H-active dicarbonyl compounds and a process for their preparation are described. Paints formulated on the basis of the described binders can be cured at temperatures at from 120.degree. C. to provide resistant films.

Abstract: Crosslinking components for hydroxy and/or primary and/or secondary amino group containing paint binders for the crosslinking of synthetic resins carrying at least two groups capable of ester or amide formation with carboxylic acids. In particular there is disclosed the use of the crosslinking components in compositions for electrodeposition (ED) whereby at 120.degree. C. and above coatings with extraordinary paint performance are obtained. The use of methyl or ethyl esters gives extremely low condensation losses. The crosslinking components are obtained through reaction of one mole of a diisocyanate, preferably at room temperature, in the presence of sodium, or preferably sodium phenolate, as catalyst, with at least one mole of a CH-active alkyl ester of the general formula X--CH.sub.2 --COOR, wherein X is --COOR, --CN or CH.sub.3 --CO-- and R is an alkyl radical with 1 to 8 C-atoms and subsequent reaction of the free isocyanate groups with polyamines of the general formula H.sub.2 N--(R--NH).sub.n --R--NH.

Abstract: Water-dilutable coating compositions comprising a combination of specifically selected acrylic copolymers, dissolved in a specifically defined solvent blend, combined with coloring and/or optical effect imparting pigments, and, optionally, polymer dispersions and amine resins, are described. The compositions when used as a base coat for wet-on-wet application of a multi-coat paint system exhibit excellent performance on application and give finishes with outstanding properties.

Abstract: Modified cationic epoxy resins wherein phenols linked through modified urea groups are used to extend the chain of diepoxy resins are described. The modified cationic resins can be formulated as paints which exhibit excellent properties particularly when used for electrodeposition paints.

Abstract: The invention is concerned with stabilized metal pigments, in particular aluminum pigments, particularly against water and moisture, with improved resistance characteristics in aqueous paints. The stabilization of the metal particles is carried out through treatment with carboxyalkylene phosphoric acid esters, and/or carboxyalkylene phosphonic acids, and/or carboxyalkylene phosphinic acids. The carboxylic group of the compounds can be at least partially neutralized if desired.

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: Self-crosslinking paint binders, particularly for the formulation of water-dilutable, cathodically depositable paints (CED-paints), are obtained through reaction of formaldehyde with the reaction product of aminoalkylation products of phenols carrying at least one NH-group and semi-blocked diisocyanates and their subsequent reaction with epoxy compounds. The binders, when cathodically deposited, cure rapidly at low stoving temperatures to provide hard, solvent-resistant coatings.

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: Cathodically depositable self-crosslinking binders for electrodeposition having a substantially water-insoluble component which is a derivative of a dioxazolidine which carries chain-end or side-chain unsaturated double bonds are described. The binders have favorable wetting properties and emulsifying characteristics, as well as excellent film characteristics in the finished coatings.

Abstract: The invention is directed to a process for the production of cationic binders for pigment pastes for water-dilutable paints, particularly for cathodic electrodeposition based on low molecular oxazolidine group carrying modified epoxy compounds, and to the pastes obtained. The process is characterized in that preferably aliphatic di- or polyepoxy compounds are reacted with primary mono- and/or diamines and optionally monocarboxy compounds and that oxazolidine groups are introduced into the molecule by reaction with carbonyl compounds. The products show extremely high pigment loading capacity and an excellent performance in cathodically depositable electrodeposition paints. The products permit formation of low solvent paint systems.

Abstract: Cathodically depositable binders water-dilutable upon neutralization comprising the reaction product of amine adducts of polyglycidylethers of polyphenols having an amine value based on tertiary amine groups of between about 30 and about 130 mg KOH/g, a hydroxy value based on primary hydroxy groups of between about 20 and about 200 mg KOH/g, and an average molecular weight of from about 1000 to about 20,000 with 0.5 to 20% b.w. based on the weight of the adduct of a polyoxyalkylene glycidyl ether to provide an adduct having polyoxyalkylene segments. The introduced hydrophilic segments allow for a reduction in the degree of neutralization necessary for stability of an electrodeposition bath which favorably influences the deposition equivalent and throwing power of the binder in a cathodic electrodeposition system.

Abstract: A process for producing multiple-coat paint systems is described wherein a cathodically electro-depositable primer containing thermically polymerizable synthetic resins as the binder, immediately prior to the application of an additional coating, is irradiated with ionizing irradiation for a period of from one to 20 seconds. The irradiation for the short period of time cures the primer so that subsequent coatings applied to the primer do not detrimentally affect the primer coating or the finished paint system.

Abstract: Cathodically depositable self-crosslinking binders for electrodeposition based on alkylphenol novolaks wherein an alkylphenol novolak having a molecular weight of at least 500 and a hydroxyl value of between 100 and 700 mg KOH/g, modified through self-condensation or etherification of the phenolic hydroxy groups, obtained through a reaction catalyzed with an acid (component A), is reacted simultaneously or separately with (B) amines which carry a tertiary amino group and at least one hydroxy group or primary or secondary amino group (component B) and (C) aromatic or aliphatic or cycloaliphatic polyisocyanates (component C), the weight ratio of components being chosen in order that for each mole of component (B) 2 to 4 NCO-equivalents of component (C) are present and that the resultant isocyanate-group-free reaction product has an amine value of between 40 and 120 mg KOH/g is described.

Abstract: Hydrazine is utilized for preventing side reactions during the preparation and storage of polyisocyanates partially blocked with hydroxy amines which are utilized for the introduction of basic functional groups into organic coating compositions which are deposited cathodically in an electrodeposition process. The inhibiting compound is used in the form of hydrazine hydrate at a level of from about 50 to 5000 ppm calculated on the amine used in the reaction.

Abstract: Cathodically depositable self-crosslinking binders for electrodeposition based on alkylphenol-formaldehyde condensates wherein an alkylphenol-formaldehyde condensate having a molecular weight of at least 500 and a hydroxyl value of between 100 and 700 mg KOH/g, modified through self-condensation or etherification of the phenolic hydroxy groups, obtained through a reaction catalyzed with a base (component A), is reacted simultaneously or separately with (B) amines which carry a tertiary amino group and at least one hydroxy group or primary or secondary amino group (component B) and (C) aromatic or aliphatic or cycloaliphatic polyisocyanates (component C), the weight ratio of components being chosen in order that for each mole of component (B) 2 to 4 NCO-equivalents of component (C) are present and that the resultant isocyanate-group-free reaction product has an amine value of between 40 and 120 mg KOH/g is described.

Abstract: Cationic epoxy resin esters suitable as binders for stoving coating compositions, particularly for application by electrodeposition, and as mill base resins for grinding pigments and extenders; and a process for producing same is described. The resin esters are produced through reaction of a resinous compound carrying at least two 1,2-epoxy groups with carboxylic acids and, optionally, with primary and/or secondary alkyl- and/or alkanolamines. The carboxylic acid employed, totally or partially, is the reaction product of a dicarboxylic acid anhydride and a tertiary amine which has the structure - ##STR1## wherein R and R.sub.x are a hydrogen atom or an alkyl radical or an aryl radical which may be substituted, R.sub.

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: Cathodically depositable electrodeposition paint binders comprising a mixture of (A) 95-50% by weight of 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; and (B) 5-50% by weight of an addition component which is substantially water-insoluble under the conditions of electrodeposition and being compatible with Component A. The presence of Component B in the binder provides increased resistance to corrosion, improvements in the surface quality of the stoved films, and enhanced crosslinking of the binder.

Abstract: Cationic synthetic resin binders free of epoxy groups for the formulation of electrodeposition paints are described. The binders are the reaction product of an epoxy resin carrying at least two epoxy groups and having an epoxy equivalent of 190 to 1000, with from 0.1 to 1.0 amino groups per available epoxy group of a secondary amine carrying carboxylic acid amide groups. Upon being crosslinked on stoving with a suitable hardening component, the binders have improved water dilutability, permitting a reduction of the degree of neutralization necessary for electrodeposition application and improved intercoat adhesion to addition coats. These improved characteristics are significant with respect to an increase of current yield and in adhering additional coatings of a paint system.