Abstract: The invention relates to acrylate copolymers with free double bonds, which are obtainable by copolymerization ofa) 3 to 30% by weight of ethylenically unsaturated monomers with at least two polymerizable double bonds,b) 5 to 60% by weight of monomers with a functional group andc) other ethylenically unsaturated monomers, the sum of all the monomers being 100% by weight, and subsequent reaction of the polymer (A) formed with compounds (B) which, in addition to a group which can react with the functional groups of (A), contain at least one ethylenically unsaturated polymerizable double bond.The invention also relates to processes for the preparation of the acrylate copolymers.

Abstract: An apparatus for measuring fluid flow has a measuring device operating in accordance with the Coriolis principle. The measuring device has an oscillating conduit wherein the fluid to be measured flows through the conduit, and a sensor for sensing the movement of the conduit and generating output signals indicative of the movement. The measuring device generates a measurement signal based on the sensor signal indicative of the flow rate of fluid through the conduit. A counting device is coupled to the measuring device for receiving the measurement signal and calculating the flow rate of fluid through the conduit based on the measurement signal.

Abstract: The invention relates to a process and device for measuring the effective viscosity and the elastic properties of coatings. Known measuring processes and measuring devices based on the "rolling ball method" suffer from drawbacks, namely run formation and sinking of the relatively heavy solvent vapors, due to the inclination of the coated sheet metal. To overcome these drawbacks, rolling movements are imparted to a magnetizable ball (1) displaced from its rest position in a magnetic field, during movement of the horizontally disposed substrate, under the influence of the field gradient of a permanent magnet or electromagnet (4) located below the substrate. The rolling movements are used as the basis for the measurements.

Abstract: The invention relates to dispersions which are obtainable from sheet silicates, a protective colloid and an aqueous dispersant and are suitable for the incorporation of sheet silicates into water-dilutable coating compositions. The dispersions according to the invention are obtainable using poly(propylene oxide) as the protective colloid, and the poly(propylene oxide) contains no hydrophobic terminal groups, has on average at least one hydroxyl group per molecule and may optionally contain up to 40% by weight of --CH.sub.2 --CH.sub.2 --O-- units.

Abstract: A water-dilutable coating comprising a binder obtained from an epoxide resin-modified polyester possessing free carboxyl groups prepared from the reaction of:A) a polyester polymerized from:a.sub.1) a polycarboxylic acid containing at least three carboxyl groups and/ora.sub.2) a polyol containing at least one carboxyl group anda.sub.3) a polycarboxylic acid containing two carboxyl groups anda.sub.4) a polyol; wherein the polyester contains (cyclo)aliphatic elements having at least six carbon atoms; andB) from 0.3-1.5 equivalents per polyester molecule of a bisphenol epoxide resin or a reaction product thereof containing at least one epoxide group per molecule with a carboxylic acid.

Abstract: The invention relates to coating compositions which are particularly suitable for the preparation of the basecoat for two-coat coatings of the basecoat/clearcoat type, and which comprise organic diluents, at least one resin containing urethane and urea groups, and, where appropriate, other resins, pigments and other conventional additives in common use.

Abstract: The invention relates to a dispersing process in which a mill base consisting of solids and of a liquid phase is conveyed through a stirred ball mill containing a grinding medium, energy is supplied in this stirred ball by rotating rotors, and the solids are dispersed, and wet with the liquid phase, wherein the rotors rotate at such a high speed that the grinding medium moved by them forms, as the result of the centrifugal force, a rotating grinding medium charge which is in contact with the inner wall of the stirred ball mill, a space which is essentially free of a grinding medium being formed in the center of this grinding medium charge, the mill base is fed radially into the stirred ball mill, flows radially through the grinding medium charge in such a way that a centrifugal fluidiesd bed is formed with respect to the grinding medium, and is removed from the space which is free of grinding medium through an apparatus for separating off grinding medium.

Abstract: The invention relates to a process for coating metal strip in the coil coating process. The coating materials employed consist of:a) 3 to 50% by weight, preferably 20 to 40% by weight, of polyester imide resins, the 20 to 60% by weight solutions of which possess viscosities from 90 to 4,000 mPas at 23.degree. C. and the hydroxyl values of which are in the region from 50 to 300,b) 3 to 40% by weight, preferably 10 to 30% by weight, of pigments and/or fillers,c) up to 3% by weight of suitable auxiliary substances and additives andd) 10 to 90% by weight, preferably 20 to 60% by weight, of one or more organic solvents,the sum of a), b), c) and d) being 100% by weight. The invention further relates to the use of the metal strip produced by the process according to the invention for production of exhaust components.

Abstract: The invention relates to water-dilutable binders for cationic electrocoating finishes, the said binders containing latent primary amino groups. In order to prepare the binders, an epoxy resin is reacted with a polyamine, which in addition to a sterically hindered primary amino group also contains at least one primary amino group blocked by reaction with a ketone or aldehyde, and, if appropriate, further primary or secondary amines.

Abstract: The invention relates to a soluble, crosslinkable acrylate copolymer which is obtainable by copolymerization of more than 3 to 30% by weight of monomers having at least two polymerizable, olefinically unsaturated double bonds, from 5 to 50% by weight of monomers having a cross-linkable group, with the exception of hydroxyl groups and carboxyl groups, and from 20 to 92% by weight of further monomers having a polymerizable, olefinically unsaturated double bond, the sum of the monomers being 100% by weight. The invention furthermore relates to processes for the preparation of acrylate copolymers and coating agents based on the acrylate copolymers according to the invention.

Abstract: The invention relates to an aqueous coating agent, obtained from an epoxy resin, ethylenically unsaturated monomers, some of which contain carboxyl groups, a peroxide initiator in a proportion of at least 2% by weight, relative to the total weight of the monomers, a crosslinking agent, a neutralizing agent, organic solvents, and, if appropriate, further conventional additives, such as plasticizers, stabilizers, wetting agents, dispersion auxiliaries, catalysts and pigments.

Abstract: The invention relates to cathodic water-dilutable binders which contain primary amino groups neutralized with acids and introduced via ketimine groups. The binders have been prepared by reacting(A) a synthetic resin containing epoxy groups with(B) at least one compound which, in addition to a mercapto group which is reactive toward epoxy groups, also possesses at least one ketimine group, and, if required,(C) other modifying compounds, such as, for example, monocarboxylic acids and/or other primary and/or secondary amines,and have then been neutralized with an acid.

Abstract: The invention relates to a process for the preparation of aqueous dispersions to be further processed to electrocoating paints with baking temperatures below 160.degree. C. and baking times.ltoreq.30 minutes, which dispersions contain modified epoxide-amine adducts as binders and polyisocyanates blocked by hydroxyl groups as cross-linking agents.In this process polyepoxides and compounds containing one or more, preferably 2, hydroxyl groups per molecule are reacted at elevated temperatures in the presence of catalysts to furnish epoxide-containing intermediates.A solvent or a mixture of solvents is then added with external cooling ahd the solution is boiled under reflux, if necessary in vacuo, until the temperature of the solution drops to 95.degree. C. to 20.degree. C.

Abstract: The invention relates to a process for coating metal strip by the coil coating process using coating materials consisting of high temperature resistant systems (polyesterimides, polyamidocarboxylic acids, polyamidimides, polyhydantoins and polybismaleimides), pigments and/or fillers, suitable auxiliary substances and additives as well as solvents or solvent mixtures. The coating material is used in a one-coat or two-coat application, only polyesterimides and polyhydantoins being used for the primers as high temperatures resistant systems, while any of the high temperature resistant systems listed are used in the topcoat.

Abstract: The invention relates to a process for the preparation of macromonomers which carry at least two hydroxyl groups at one end. The process comprises(1) reacting a polyester, polyether, polyurethane, polyurea or polyamide prepolymer which has a number average molecular weight of 300 to 3000, preferably 500 to 2000, and contains an average of one terminal hydroxyl or amino group and at least one carboxyl group per molecule with a diisocyanate to form an intermediate which contains an average of one terminal isocyanate group and at least one carboxyl group per molecule, and subsequently reacting this intermediate(2) with a compound which has a molecular weight of 90 to 800, preferably 120 to 300, and contains at least two hydroxyl groups in addition to a group which is reactive to isocyanate groups, to form a macromonomer which carries an average of at least one carboxyl group and, at one end, at least two hydroxyl groups per molecule.

Abstract: The invention relates to water-dilutable coating compositions which contain a binder, an aluminum pigment and an aqueous diluent. The water-dilutable coating compositions according to the invention are distinguished in that they contain, as the aluminum pigment, a pigment which has been obtained by passivating a lubricant-containing aluminum pigment in an aqueous passivating solution which contains chromic acid and a water-soluble glycol ether of the general formula R.sup.1 --(--O--CHR.sup.2 --CH.sub.2 --).sub.n --OH (R.sup.1 represents a lower alkyl radical, R.sup.2 represents either an H atom or a lower alkyl radical, preferably a --CH.sub.3 group, and n represents a number from 1 to 5) and/or a water-soluble glycol of the general formula HO--(CHR.sup.3 --CH.sub.2 --O--).sub.n H (R.sup.3 represents either an H atom or a lower alkyl radical, preferably a --CH.sub.3 group, and n represents a number from 1 to 5), at not less than 50.degree. C., preferably 60.degree. to 90.degree. C.

Abstract: In a dispersing process, a mill base consisting of solids and of a liquid phase is conveyed through a stirred ball mill containing a grinding medium, energy being supplied in this stirred ball by rotating rotors to disperse the solids are dispersed, wet with the liquid phase. The rotors rotate at such a high speed that the grinding medium moved by them forms, as the result of the centrifugal force, a rotating grinding medium charge which is in contact with the inner wall of the stirred ball mill, a space which is essentially free of a grinding medium being formed in the center of this grinding medium charge. The mill base is fed radially into the stirred ball mill and flows radially through the grinding medium charge in such a way that a centrifugal fluidized bed is formed with respect to the grinding medium. The mill base is removed from the space which is free of grinding medium through an apparatus such as a sieve for separating off grinding medium.

Abstract: The invention relates to an aqueous coating agent, obtained from an epoxy resin, ethylenically unsaturated monomers, some of which contain carboxyl groups, a peroxide initiator in a proportion of at least 2% by weight, relative to the total weight of the monomers, a crosslinking agent, a neutralizing agent, organic solvents, and, if appropriate, further conventional additives, such as plasticizers, stabilizers, wetting agents, dispersion auxiliaries, catalysts and pigments.

Abstract: The invention relates to water-dilutable binders for cationic electrocoating finishes, the said binders containing latent primary amino groups. In order to prepare the binders, an epoxy resin is reacted with a polyamine, which in addition to a sterically hindered primary amino group also contains at least one primary amino group blocked by reaction with a ketone or aldehyde, and, if appropriate, further primary or secondary amines.

Abstract: Basecoating compositions for preparing multilayered protective and/or decorative coatings comprise aqueous dispersions which contain(a) as film-forming material one or more polyurethane resins having an acid number of from 5 to 70, which has been prepared by preparing from(A) liner polyetherdiols and/or polyesterdiols having a molecular weight of from 400 to 3,000(B) diisocyanates and(C) compounds which contain two groups which are reactive toward isocyanate groups, one or more of the compounds used as component C having one or more groups capable of anion formation which have preferably been neutralized before the reaction with a tertiary amine,an intermediate which as terminal isocyanate groups and whose free isocyanate groups have subsequently been reacted with a polyol which contains three or more hydroxyl groups, preferably a triol,(b) pigments and(c) further customary additives.