| 摘要 |
The invention relates to a process for the multilayer coating of substrates, in particular vehicle bodies and vehicle body parts, comprising the steps: 1. applying a filler layer of a filler coating composition onto an optionally pre-coated substrate, 2. applying a base coat layer of a water-based base coat coating composition containing color-imparting and/or special effect-imparting pigments onto the filler layer, 3. applying a clear coat layer of a transparent clear coat coating composition onto the base coat layer and 4. curing the clear coat layer, optionally together with the filler layer and/or the base coat layer, wherein the filler coating composition and the transparent clear coat coating composition being organic solvent-based coating compositions comprising: A) at least one binder with functional groups containing active hydrogen, B) at least one polyisocyanate cross-linking agent with free isocyanate groups and C) at least one epoxy-functional silane of the general Formula (I): X denoting the residues with m being 1-4, or 3,4-epoxycyclohexyl, R1, R2, R3 mutually independently meaning identical or different organic residues with 1 to 30 carbon atoms per molecule, providing that at least one of the residues is an alkoxy group with 1 to 4 carbon atoms and n is 2, 3 or 4. |
