COATING AGENT FOR MATTABLE COATINGS

摘要

The present invention relates to a coating composition that is suitable in particular for the production of coatings that can be matted. The coating composition comprises a) an aqueous dispersion of a hydroxy-functional prepolymer, obtainable by reaction of at least the following components: i) a component comprising hydroxy groups, ii) a polyester polyol comprising hydroxy groups, iii) a polyisocyanate comprising isocyanate groups, iv) a compound which comprises at least two groups reactive towards isocyanate groups and at least one group capable of anion formation, v) water, wherein components i)-iii) and the ratio of components i)-iii) are so chosen that an excess of hydroxy groups is present relative to the isocyanate groups, b) nanoparticles having a number-average particle size of from 1 to 1000 nm, and c) a crosslinker comprising at least two groups reactive towards hydroxy groups. The invention further provides a process for the preparation of the coating composition, the use of the coating composition for producing a coating on a substrate, and a coating obtainable by applying the coating composition to a substrate.