Patent attributes
Aqueous coating compositions comprisingA) at least one water-dilutable (meth)acrylate copolymer with a hydroxyl value of 200 to 280 mg KOH/g andB) at least one polyisocyanate cross-linking agent with free isocyanate groups, the (meth)acrylate copolymers being the reaction product ofa) 10–50% by weight of at least one glycidyl ester derived from an aliphatic saturated monocarboxylic acid branched in alpha position,b) 0–60% by weight of at least one polyalkylene glycol(meth)acrylate,c) 0–45% by weight of at least one hydroxy-functional olefinic unsaturated monomer different from component b),d) 3–40% by weight of at least one olefinic unsaturated monocarboxylic acid,e) 0–40% by weight of at least one vinyl aromatic monomer andf) 0–40% by weight of other olefinic unsaturated monomers different from monomers a) to e),wherein component d) is used in molar excess of component a) and the % by weight of components a) to f) adding up to 100%.
