Aqueous coating composition, in particular for the coating of finish sheeting and continuous edging, as well as a process for the coating of finish sheeting and continuous edging

摘要

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 fromPPa) 33 to 55 mol % of a dicarboxylic acid component obtained fromP Pa.sub.1) 50 to 100 mol % of olefinically unsaturated aliphatic dicarboxylic acidsPPa.sub.2) 0 to 50 mol % of saturated aliphatic dicarboxylic acidsPPa.sub.3) 0 to 50 mol % of saturated aliphatic dicarboxylic acids andPPb) 67 to 45 mol % of a polyol component obtained fromPPb.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 200PPb.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 andPP b.sub.3) 0 to 70 mol % of at least one polyol having 2 to 4 OH groups and 4 to 10 carbon atoms per molecule, except the glycols used as component b. sub.1.