| 摘要 |
<p>The present invention relates to coating compositions which are based on aprotic solvents and contain at least one oligomeric and/or polymeric hydroxyl-containing compound (A), at least one compound (B1) having at least one silane group of the formula (I): -X-Si-R"xG3-x where G = identical or different hydrolysable groups, X = an organic radical, in particular a linear and/or branched alkylene or cycloalkylene radical having from 1 to 20 carbon atoms, R" = alkyl, cycloalkyl, aryl or aralkyl, where the carbon chain can be interrupted by nonadjacent oxygen, sulphur or N Ra groups, where Ra = alkyl, cycloalkyl, aryl or aralkyl, x = 0 to 2, and at least one compound (B2) which is different from the component (B1) and has at least 2 isocyanate groups per molecule, characterized in that the compound (B2) has uretdione groups and the compound (B2) has been prepared from a linear, aliphatic diisocyanate (DI). The present invention also provides multilayer coating processes using this coating composition and also provides for the use of the coating composition as clear varnish or use of the coating process for automobile repair surface coating and/or for the coating of polymer substrates.</p> |
