Abstract: Binder systems suitable for electrocoating and consisting of a base resin A which carries groups which can be protonated with acids or cationic quaternary groups and, if desired, hydroxyl or thiol groups, a crosslinking component B which carries at least two blocked isocyanate groups per molecule and an organic iron compound C which is partially or completely soluble in water, as a catalyst for the thermal crosslinking of components A and B, and if desired, an additive D which increases the catalytic activity of C, are used to prepare dispersions which are used for electrocoating.

Abstract: The invention relates to a process for the production of a multicoat coating in which an aqueous transparent topcoat composition containing a polyacrylate resin as binder is employed. The polyacrylate resin can be obtained by adding, either successively or alternately in part amounts, a mixture of a carboxyl-containing ethylenically unsaturated monomer (a1) and a monomer (a2) free from carboxyl groups and a mixture (b) consisting of (meth)acrylic acid esters which are free from carboxyl groups, of hydroxyl-containing ethylenically unsaturated monomers and, if appropriate, of other ethylenically unsaturated monomers to an organic solvent and carrying out a polymerization in the presence of a radical-forming initiator and, at the end of the polymerization, neutralizing the resultant polyacrylate resin and dispersing it in water. The type and amount of (a1), (a2) and (b) are chosen so that the polyacrylate resin has a hydroxyl value of 40 to 200, an acid value of 20 to 100 and a glass transition temperature (T.

Abstract: Novel polymers which are suitable as binders are obtainable by reacting(A) a base resin which has an average molecular weight M.sub.w of from 200 to 5,000 and contains on average from 1 to 3 epoxy or isocyanato groups as the reactive groups per moleculewith(B) a mixture of(B1) 5 to 50% by weight of polyisobutylene which is terminated with primary amino groups and has an average molecular weight M.sub.w of from 500 to 5,000 and(B2) 5-95% by weight of an amidoamine which carries primary amino groups and is obtainable by condensation of diprimary diamines of 2 to 20 carbon atoms with aliphatic C.sub.2 -C.sub.44 -dicarboxylic acids,the amounts being such that from 1 to 5 equivalents of primary amino groups of (B) are present per equivalent of reactive groups of (A).

Abstract: Polymeric reaction products are obtained by reactingI) prepolymers obtained fromA) polyoxyalkylenes which have an average molecular weight M.sub.n of from 140 to 10,000 and contain on average from 1.5 to 3.0a.sub.1) primary or secondary amino groups ora.sub.2) epoxy groupsper molecule andB) polymers which are based on conjugated dienes, have an average molecular weight M.sub.n of from 250 to 50,000 and contain on average from 1.5 to 3.0b.sub.1) primary or secondary amino groups orb.sub.2) epoxy groupsper molecule, the components (a.sub.1) and (b.sub.2) or (a.sub.2) and (b.sub.1) being reacted with one another so that from at least an amino equivalent excess to 3 amino equivalents of component (a.sub.1) or (b.sub.1) are present per epoxide equivalent of component (a.sub.2) or (b.sub.2),withII) at least one compound which forms free radicals.

Abstract: Synthetic resins are based on products which are obtainable by reactingA) epoxy-carrying resins based ona.sub.1) polyhydric phenols anda.sub.2) at least one compound selected from the group consisting of.alpha..sub.1) polyoxyalkylenepolyols,.alpha..sub.2) polyoxyalkylenepolyepoxides,.alpha..sub.3) polyoxyalkylenepolyamines and.alpha..sub.4) polyhydric aliphatic alcohols and,if desired,a.sub.3) phenolic compounds which react monofunctionally toward epoxides,B) monocarboxylic acids of 5 to 30 carbon atoms,C) amines which contain at least one primary and one tertiary amino group andD) formaldehyde-donating compounds.

Abstract: The present invention relates to a process for the preparation of closures for imperviously sealing packaging containers, by which a sealing composition is applied and stoved onto the inside of the closures, wherein the sealing composition containsA) 65 to 93% by weight of a liquid, blocked diisocyanateB) 2 to 15% by weight of a liquid diamine and/or polyamineC) 0 to 25% by weight of pigments and/or fillersD) 0 to 20% by weight of one or more reactive diluentsE) 0 to 8% by weight of auxiliaries and additives, where the sum of the proportions by weight of the components A to E is 100% by weight in each case.The present invention furthermore relates to the closures prepared by the process according to the invention and also to packaging containers which contain these closures.

Abstract: The invention relates to a cathodic electrocoating process, which uses electrocoating baths which contain a cationc amine-modified epoxy resin otainable by reacting(A) a diepoxy compound of an epoxy equivalent weight below 2000B) a compound monofunctionally reactive toward the epoxide groups and containign an alcoholic OH group, a phenolic OH group or an SH group, and(C) an amine,the components (A) and (B) being used in molar ratio of 10:1 to 1:1, preferably 4:1 to 1.5:1 and the positive charges being introduced by protonization of the reaction product and/or by use of amine salts as the component (C). The electrocoating baths used are distinguished by containing at least 7.5% by weight of a polyoxyalkylenepolyamine, the percentage by weight referring to the total amount of binders contained in the electrocoating bath.

Abstract: The invention relates to a process for coating electrically conductive substrates, in which aqueous electrodeposition paints containing 1 to 15 percent by weight of electrically conductive carbon black and/or graphite having a primary particle diameter of less than 10 .mu.m in combination with up to 12 percent by weight of zinc powder or zinc flakes, with the percentages by weight relating to the total amount of binder and--if present--crosslinking agent contained in the electrodeposition paint, are employed.

Abstract: The subject of the present invention is a process for the production of closures, in which process a sealing composition is applied and baked on the inside of the closures, wherein a sealing composition is applied which containsA) 20 to 95% by weight of at least one compound having on average more than two isocyanate groups per molecule and/or of a diisocyanate prepolymer, the isocyanate groups being blocked,B) 1.5 to 30% by weight of at least one diamine and/or polyamine,C) 0 to 78.5% by weight of at least one plastic and/or elastic and/or reactive organic polymer,D) 0 to 60% by weight of pigments and/or fillers,E) 0 to 50% by weight of one or more reactive diluents andF) 0 to 20% by weight of auxiliaries and additives, the sum of the proportions by weight of the components A to F being 100% in each case.The present invention also relates to the closures produced by the process according to the invention and to packaging containers which contain said closures.

Abstract: The invention relates to a process for a cathodic electrocoating process, wherein the electrocoating bath contains at least 7.5% by weight of a polyoxyalkylenepolyamine or a mixture consisting of several polyoxyalkylenepolyamines of different chemical structures, the percentage by weight referring to the total amount of binders contained in the electrocoating bath.

Abstract: The present invention relates to acid-curing aqueous coating compositions, in particular for the coating of finish sheeting and continuous edging, which contain aminoplast resin and hydroxyl-containing polyesters, wherein the polyester is prepared froma) 33 to 55 mol % of a dicarboxylic acid component obtained froma.sub.1) 50 to 100 mol % of olefinically unsaturated aliphatic dicarboxylic acidsa.sub.2) 0 to 50 mol % of saturated aliphatic dicarboxylic acidsa.sub.3) 0 to 50 mol % of saturated aliphatic dicarboxylic acids andb) 67 to 45 mol % of a polyol component obtained fromb.sub.1) 20 to 90 mol % of at least one monomeric and/or oligomeric glycol having 2 to 4 carbon atoms per glycol segment and number average molecular weights smaller than 200b.sub.2) 5 to 30 mol % of at least one polymeric glycol having 2 to 4 carbon atoms per glycol segment and a number average molecular weight between 300 and 1000 andb.sub.

Abstract: The invention relates to a basecoat/clearcoat process in which the basecoat composition used contains as a film former a polyurethane resin which can be prepared by preparing an intermediate from(A) a mixture obtained from 10 to 90 mol % of linear polyether diols and 90 to 10 mol % of polyester diols,(B) diisocyanates,(C) compounds which contain two groups reactive toward isocyanate groups, at least some of these compounds having at least one group capable of forming anions, and the free isocyanate groups of the said intermediate are then reacted with(D) polyols containing at least three hydroxyl groups, and the reaction product obtained in this manner is transferred into an aqueous base, whereina) the polyester diol is prepared from diols and an acid component which consists of 60 to 100 % by weight of aliphatic dicarboxylic acids of more than 18 carbon atoms and of 40 to 0 % by weight of aliphatic dicarboxylic acids of 2 to 18 carbon atoms,b) the equivalent ratio of the NCO groups to the total of the OH gro

Abstract: The invention relates to a process for the production of multicoat finishes, in which(1) an aqueous pigmented basecoat containing a waterthinnable polyurethane resin is applied to the substrate surface as basecoat,(2) a polymer film is formed from the coating applied in stage (1),(3) a transparent topcoat is applied to the basecoat obtained in this way and subsequently(4) the basecoat is baked together with the topcoat, and the water-thinnable polyurethane resin contains structural units of the formula ##STR1## X representing a divalent aromatic hydrocarbon radical and R.sup.1 and R.sup.2 representing an alkyl radical having 1 to 4 carbon atoms.

Abstract: The invention relates to a method of priming or one-coat painting of plastics using water-borne paints which comprises employing a water-borne paint which contains an at least partially protonated product of the reaction of(A) a butadiene- and acrylonitrile-based copolymer containing primary and/or secondary amino groups, or a mixture of such copolymers, and(B) an organic compound which has a number average molecular weight of from 140 to 10,000 and contains, on statistical average, at least 1.5 epoxide groups per molecule, or a mixture of such organic compounds.

Abstract: Epoxy resins obtainable by reactingA) a polyfunctional epoxide, which carries on average 1.5 to 2.5 epoxy groups per molecule and has an epoxide equivalent weight of from 100 to 2000, with based on 1 mol of epoxy groupsB) from 0.1 to 0.5 mol of an alkylphenol, the alkyl groups of which carry from 6 to 20 carbon atoms, andC) from 1 to 100 mmol of a polyoxyalkylenediol obtained from 1,2-propylene oxide, or of a copolymer obtained from 1,2-propylene oxide and other alkylene oxides, which has an average molecular weight of from 200 to 5000 and, on average, from 1 to 4 sulfonic acid groups bonded to methyl groups per molecule, and alsoD) from 0.2 to 0.3 mol of a diol, which isd1) a phenolic diol and/ord2) a polyoxyalkylenediol which has an average molecular weight of from 200 to 5000,with the proviso that the reaction product has an epoxide equivalent weight of from 1000 to 5000, can be converted to pigment resins suitable for electrodeposition coating and pigment pastes can then be prepared from said resins.

Abstract: Water-thinnable coating compositions useful in electrocoating compriseA. a mixture ofA.sub.1. 50-95% by weight of one or more oligomeric or polymeric polyaddition or polycondensation compounds which have on average a molecular weight of from 200 to 20,000 and contain per molecule at least two hydroxyl groups and at least two primary and/or secondary amino groups, andA.sub.2. 5-50% by weight of a crosslinker that is reactive toward component A.sub.1, andB. a mixture ofB.sub.1. 90-99.9% by weight of one or more radical-polymerizable compounds which have an average molecular weight of from 100 to 10,000 and contain per molecule at least two olefinic double bonds, andB.sub.2. 0.1-10% by weight of a free radical initiator having a decomposition temperature within the range 50-150.degree. C.,the ratio of mixture A to mixture B being from 10:1 to 1:10 and mixture A being substantially chemically inert toward mixture B.

Abstract: Structured layers of heat-resistant polycondensates are prepared by a process wherein ethylenically unsaturated tetracarboxylates or adducts or salts of tetracarboxylates, which still contain at least one unesterified carboxylic acid group, with ethylenically unsaturated amines, amides or onium compounds mixed with compounds which contain amino, isocyanate or blocked isocyanate groups and can be subjected to polycondensation with the tetracarboxylates are applied as a layer to a substrate, this layer is exposed through a negative, the unexposed, soluble parts are then removed and the insoluble parts are converted into the final polycondensate form at elevated temperatures.

Abstract: A synthetic resin contains, as essential components,A) a crosslinkable binder selected from the group consisting of the polymers, polyadducts or polycondensates having reactive centers in the form of hydroxyl, thio or primary or secondary amino groups andB) a crosslinking agent based on at least one polyoxyalkylene polyisocyanate andC) a crosslinking agent which differs from (B) and is based on.gamma..sub.1) a polyfunctional isocyanate which differs from (B) or.gamma..sub.2) an organic compound which reacts at elevated temperatures with free amino groups of component (A) with amide formation or.gamma..sub.3) an organic compound which reacts at elevated temperatures with hydroxyl groups of component (A) with transesterification or.gamma..sub.4) a phenolic Mannich base ora mixture of two or more crosslinking agents (.gamma..sub.1) to (.gamma..sub.4).

Abstract: The invention relates to aqueous electrocoating paints which contain 2 to 10% by weight of an anticorrosive pigment based on zinc silicate in combination with 1 to 15% by weight of a very fine quartz powder or cristobalite powder coated with epoxysilane or aminosilane, the percentages by weight being based on the total solids content of the electrocoating paint and the anticorrosive pigment being preparable by fusing together 35 to 65% by weight of ZnO, 15 to 35% by weight of SiO.sub.2 and 0 to 20% by weight of B.sub.2 O.sub.3 and/or 0 to 20% by weight of WO.sub.3 and/or 0 to 20% by weight of MoO.sub.3 and/or 0 to 20% by weight of SnO.sub.2, the components being fused together using at least one of the cited oxides besides ZnO and SiO.sub.2 in such a manner that the percentages by weight always total 100.

Abstract: The present invention relates to a polycondensation and/or addition product containing carboxyl groups and amino groups. This can be obtained by reactinga) polycarboxylic acids or anhydrides thereof, if appropriate together with monocarboxylic acids,b) polyols, if appropriate together with monools, and, if appropriatec) further modifying components, and, if appropriate,d) a component which is capable of reacting with the reaction product from a), b) and, if appropriate, c), with the proviso that the final product contains tertiary amino groups which originate from components a) and/or b) and/or d), and the reaction product from a), b), if appropriate c) and if appropriate d) has an acid number from 5 to 200, preferably 10 to 130, and an amine number from 3 to 150, preferably 10 to 100.