Abstract: Curing agents which contain carboxy groups, obtained by partial neutralization of an oligoester having an acid number in the range from 245 to 265 with a cyclic amidine, for epoxy-group-containing powder coating compositions to produce matte coatings.

Abstract: A process for preparing an alkenyl derivative of an aromatic hydrocarbon by reacting a conjugated diolefin with the aromatic hydrocarbon comprises conducting the reaction in the presence of a catalyst comprising:1. a nickel compound which is soluble in the aromatic hydrocarbon;2. an organo-aluminum halide; and3. a modifying agent wherein the modifying agent (3) is a compound of the formulae ##STR1## wherein X in each case is chlorine, bromine or iodine; andR.sup.1 to R.sup.16 independently are each a straight-chain or branched, saturated or unsaturated aliphatic or cycloaliphatic hydrocarbon radical of 1-20 carbon atoms, optionally substituted by 1-41 halogen atoms, ora hydrocarbon aryl radical of 6-14 carbon atoms, optionally substituted by(a) 1-5 straight-chain or branched, saturated or unsaturated, aliphatic or cycloaliphatic radicals, each of 1-10 carbon atoms optionally substituted by halogen atoms, or(b) 1-9 halogen atoms, and wherein R.sup.4 to R.sup.16 can alternatively be hydrogen, andR.sup.1 and R.

Abstract: Liquid, highly pigmentable coating compositions containing little or no solvent and which are suitable for spray coating employ a binder consisting either ofA. 45-10% by weight of an aminoplast, a low-molecular weight precursor thereof, or a mixture thereof, andB. 55-90% of an at least bifunctional polyester, or a mixture thereof, having predominantly hydroxy end groups, a degree of condensation of between 2.5 and 10.5 and a molecular weight of up to 1,000, and prepared by condensing an alcohol component consisting of 0-30 molar percent of one or more 3-6 carbon atom polyols having 3-4 hydroxy groups and 100-70 molar percent of a mixture of diols consisting of 33-90 molar percent of ethylene glycol and 67-10 molar percent of 1,2-propanediol, or a condensation product of A and B.