| abstract |
The invention relates to a process for the multilayer coating of substrates, in particular vehicle bodies and vehicle body parts, comprising the steps: n 1. Applying a base coat layer of a water-based base coat composition containing color-imparting and/or special effect-imparting pigments onto an optionally precoated substrate, 2. Applying a clear coat layer of a transparent clear coat coating composition onto the base coat layer, and 3. Curing the clear coat layer, optionally together with the base coat layer, wherein the transparent clear coat coating composition being an organic solvent-based coating composition comprising:n 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): nn n n n n n n n n n X denoting the residues n n n n n n n n n n 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. |