| abstract |
Described is a clearcoat coating composition, its use, and a process for preparing the clearcoat coating composition. The clearcoat coating composition comprises (A) at least one polyester having an OH number of 80-250 mg KOH/g, comprising (A1) 10 to 20 mol % of at least one acyclic, aliphatic, branched polyol having two hydroxyl groups, (A2) 5 to 15 mol % of at least one acyclic, aliphatic, branched polyol having three hydroxyl groups, (A3) 10 to 20 mol % of at least one acyclic, aliphatic, branched polyol having four hydroxyl groups, (A4) 25 to 40 mol % of at least one cycloaliphatic 1,2-dicarboxylic acid and/or the anhydride of this dicarboxylic acid, and (A5) 20 to 35 mol % of isononanoic acid, wherein the molar fractions are based in each case on the total molar fraction of the compounds (A1) to (A5) and wherein this total molar fraction accounts for at least 70 mol % of the compounds present in the polyester (A); (B) at least one butanol-etherified melamine-formaldehyde resin having a crosslinking onset temperature between 65° C.-100° C. lower than the crosslinking onset temperature of hexamethoxymethylmelamine; (C) at least one butanol-etherified melamine-formaldehyde resin having a crosslinking onset temperature between 30° C.-60° C. lower than the crosslinking onset temperature of hexamethoxymethylmelamine; (D) at least one organic urea compound as rheological assistant; and (E) at least one acid catalyst. |