COATING AGENT AND COATINGS PRODUCED THEREFROM HAVING HIGH SCRATCH RESISTANCE AND WEATHERING RESISTANCE AND GOOD OPTICAL PROPERTIES

摘要

The invention relates to coating agents comprising (a) at least one compound (A) containing hydroxyl groups, (b) at least one saturated compound (B) having free and/or blocked isocyanate groups comprising at least partially hydrolysable silane groups, and (c) at least one catalyst (D) for cross-linking silane groups, characterized in that the coating agent comprises at least one hyperbranched, dendritic hydroxy-functional polyester as the compound containing hydroxyl groups (A), wherein at least one hydroxyl function of the polyester is esterified by at least one acid selected from the group of isomers C8 to C9 monocarboxylic acids. The present invention further relates to a multistage coating method using said coating agent and to the use of the coating agent as a clear varnish for producing multilayer paint coatings producing effects and/or coloring, and to the use of the coating method for series painting and repair painting of automobiles.