Abstract: The invention concerns polyadducts and their use.The polyadducts, possessing nitrogen-basic groups, have a mean molecular weight of from 500 to 10,000 and contain groups, attached to aromatic rings, of the general formula (I) ##STR1## where R.sup.1 and R.sup.2 are identical or different and each is hydrogen or methyl.In particular, these polyadducts are used, after protonizing with an acid, as binders for the cathodic electrocoating of metal articles.

Abstract: A process for the preparation of self-crosslinking, cathodic electrocoating binders by reacting polyether-polyols, which may or may not contain thio groups, with semi-blocked diisocyanates or partially blocked polyisocyanates, wherein the reaction products (A), containing blocked isocyanate groups, are reacted with a polyamine (B), some of whose amino groups may or may not be in the form of ketimine groups, in such a way that one or more amino groups of the polyamine (B) form a urea group with a blocked isocyanate group of the reaction product (A), and the self-cross-linking reaction product of (A) and (B) is converted into a water-dilutable form in the conventional manner by protonization with an acid.The coating binders prepared according to the invention may be used for cathodic electrocoating of metal articles.

Abstract: Polyadducts, free from epoxide groups, are obtained from ammonia and epoxide compounds by reacting 1 mole of ammonia with from 1.2 to 2.0 equivalents of epoxide, so that if diepoxide compounds are used products of the general formula (I) ##STR1## are obtained, while if triepoxides and/or tetraepoxide compounds are used, by themselves, or together with diepoxide compounds, products of the general formula II ##STR2## are produced; in these formulae, the E.sup.1 's are identical or different hydroxyl-containing divalent radicals and the E.sup.2 's are identical or different hydroxyl-containing trivalent or tetravalent radicals, resulting from the opening of the oxirane rings of epoxide compounds containing two, three or four epoxide groups in the molecule, n.sup.1, n.sup.3 and n.sup.5 are from 0 to 3, n.sup.2 and n.sup.4 are from 1 to 3 and X is 0 or 1, and one or more of the divalent radicals E.sup.1 in the general formula (II) may or may not be replaced by polyvalent radicals E.sup.2.

Abstract: The binders are reaction products of (A) adducts of ammonia or diamines and epoxide compounds with (B) partially or fully blocked diisocyanates or polyisocyanates, with or without (C) diamines or polyamines, the amino-.beta.-hydroxyalkyl groups of component (A) preferably having been reacted--prior to their reaction with component (B)--with a carbonyl compound, preferably an aldehyde, to form an oxazolidine ring. The reaction products are ultimately protonized with an acid.These binders are used for the cathodic electrocoating of metallically conductive articles.

Abstract: Polyadducts, free from epoxide groups, are obtained from ammonia and epoxide compounds by reacting 1 mole of ammonia with from 1.2 to 2.0 equivalents of epoxide, so that if diepoxide compounds are used products of the general formula (I) ##STR1## are obtained, while if triepoxides and/or tetraepoxide compounds are used, by themselves, or together with diepoxide compounds, products of the general formula II ##STR2## are produced; in these formulae, the E.sup.1 's are identical or different hydroxyl-containing divalent radicals and the E.sup.2 's are identical or different hydroxyl-containing trivalent or tetravalent radicals, resulting from the opening of the oxirane rings of epoxide compounds containing two, three or four epoxide groups in the molecule, n.sup.1, n.sup.3 and n.sup.5 are from 0 to 3, n.sup.2 and n.sup.4 are from 1 to 3 and X is 0 or 1, and one or more of the divalent radicals E.sup.1 in the general formula (II) may or may not be replaced by polyvalent radicals E.sup.2.

Abstract: Surface-coating binders based on a reaction product of Mannich bases, obtained from polyhydric phenols, secondary amines and formaldehyde, with epoxy resins. The Mannich bases and/or the epoxy resins carry hydroxyl groups, bonded to aliphatic structures, which have been converted to urethane groups by reaction with partially blocked polyisocyanates. When protonized and diluted with water, the surface-coating binders may be used as cationic electrocoatings.

Abstract: Novel anodes consist of a mixture of from 30 to 95% by weight of nagnetite, lead dioxide, magnetite/natural graphite mixture or lead dioxide/natural graphite mixture and from 70 to 5% by weight of a plastic. They may be used for the surface-coating of metallic substrates by cathodic electrocoating.

Abstract: Surface-coating binders and their use. The binders are reaction products of (A) Mannich bases obtained from one or more condensed phenols, free from ether groups, which contain two or more phenolic hydroxyl groups per molecule, one or more butadiene or isoprene homopolymers or copolymers which contain one or more ##STR1## groups per molecule and have a mean molecular weight of from 500 to 6,000, one or more secondary amines which contain one or more hydroxyalkyl groups per molecule, or a mixture of such secondary amines with another secondary amine, and formaldehyde or a formaldehyde donor, with (B) one or more epoxy resins. These surface-coating binders are used especially for the cathodic electrocoating of metal articles.

Abstract: The invention relates to surface-coating binders and to their use.The surface-coating binders, which are substantially free from epoxide groups, are based on a reaction product of (A) a Mannich base obtained from one or more polyhydric phenols which are free from ether groups and contain two or more aromatic rings, and/or one or more monohydric or polyhydric phenols which contain one or more ether groups and contain two or more aromatic rings, one or more secondary amines which contain one or two hydroxyalkyl groups and which may or may not be mixed with secondary dialkylamines or dialkoxyalkylamines, and formaldehyde or a formaldehyde donor, and (B) an epoxy resin, the reaction product of (A) and (B) additionally containing, built into its chemical structure, an olefinically unsaturated alkylphenol of the general formula (I) ##STR1## where R is a radical of 11 to 19 carbon atoms which contains from one to three carbon-carbon double bonds.

Abstract: An anode for cationic electrocoating, which consists of from 30 to 95% of graphite and from 70 to 5% of a plastic. It can be used for the electrocoating of metallic substrates.

Abstract: Pigment formulations and their use.The formulations contain pigments, organic solvents and from 10 to 80% by weight of a wetting agent consisting of a non-ionic organic compound which has a viscosity of from 500 to 10,000 mPa.s and has been produced by reacting an alkylated amide/formaldehyde reaction product and an epoxy resin, which may or may not be modified, in a weight ratio of from 9:1 to 1:9. They are used as additives in surface-coating binders, especially in cationic electrocoating finishes.

Abstract: Surface-coating binders for cathodic electrocoating which comprise a protonized heat-curable reaction product (A), substantially free from epoxide groups, of(a) one or more Mannich bases, prepared from(a.sub.1) one or more polyhydric condensed phenols which may or may not contain ether groups.(a.sub.2) one or more secondary amines which contain one or more hydroxyalkyl groups, with or without one or more secondary amines which do not contain such groups, and(a.sub.3) formaldehyde or a formaldehyde donor, with(b) one or more epoxy resins,Which binder also contains from 1 to 40% by weight, based on the total of (A) + (B), of a water-insoluble non-ionic resin (B), free from epoxide groups and containing urethane groups, which resin has been obtained by reacting a partially blocked diisocyanate or higher polyisocyanate with a reaction product of a polyepoxide and one or more low molecular weight compounds containing SH and/or OH groups.