Coating composition with good storage stability and produced therefrom coatings with high scratch resistance with good weather resistance
2009
The present invention relates to coating compositions comprising (A) at least one hydroxyl-containing polyacrylate and / or polymethacrylate and / or polyurethane and / or polyester and / or polysiloxane and (B) at least one compound (B) containing blocked isocyanate groups and alkoxysilane groups, characterized, in that (I) the hydroxyl groups of component (A) are blocked with at least one acyclic Orthoester, (Ii) the compound (B) has at least one structural unit (II) -N (X-SiR in which R = hydrogen, alkyl or cycloalkyl, X, X '= linear and / or branched alkylene or cycloalkylene radical having 1 to 20 carbon atoms, R "= alkyl, cycloalkyl, aryl, or aralkyl, n, m, x, y = 0 to 2, and m + n = 2, and (Iii) at least 90 mol% of the alkoxysilane groups are Ethoxysilangruppen. Also subject of the present invention are multi-stage coating method using these coating compositions and the use of the coating composition as a clear coat or application of the coating method for the automotive finishing and the coating of automotive attachments.
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