Abstract: A polyamide-imide precondensate which is solid at room temperature, but is fusible and soluble in polar solvents. It is manufactured by first condensing 1 mole of diamine with 2 moles of tricarboxylic acid anhydride in a diol as the solvent, to give a diimide-dicarboxylic acid, then esterifying the diimide-dicarboxylic acid with the diol and finally effecting the polycondensation by adding 1 mole of diamine per mole of diester. The precondensate may be used, as a melt, as a solution in organic solvents or as an aqueous dispersion, for coating electrical conductors.

Abstract: Self-adhesive coatings are produced on sheet materials in a simple and particularly trouble-free manner by applying to said materials mixtures of1. acrylic ester copolymers containing polymerized units of unsaturated carboxylic acids or hydroxyl-containing vinyl monomers in addition to polymerized units of higher alkyl acrylates,2. melamine/formaldehyde resins and, optionally,3. solvents for components (1) and (2),And evaporating off any solvents.

Abstract: Process for the manufacture of polyester imides. Melamine, an at least tribasic carboxylic acid, a polyhydric alcohol and, optionally, an aromatic dicarboxylic acid are condensed at elevated temperature. The polyester imides are suitable, in the form of solutions, aqueous dispersions or melts, for use as baking enamels for metallic conductors.

Abstract: The present invention relates to thermostable coating, impregnating and bonding agents. They are suspensions of finely divided water-insoluble or at most only slightly water-swellable thermostable organic binders or mixtures based on these binders in aqueous solutions of high molecular weight organic substances. They are used particularly for coating wire, for the production of thermostable coatings and for the production of laminates.

Abstract: Aqueous polyester imide dispersions are prepared by allowing molten polyester imide to solidify and then comminuting it in the dry state to a particle size of 100 .mu.m or less, whereupon the particles are milled in water to a particle size of less than 5 .mu.um. The dispersions may be used for the manufacture of heat-resistant bonds and impregnations and for electrical insulation of metallic conductors. m.

Abstract: A process for the manufacture of improved magnetic discs by applying a thin layer of a fluid dispersion of magnetic pigments and optional non-magnetic pigments in a binder mixture to a non-magnetic rigid base and curing the magnetic layer which has been applied.