| abstract |
The invention relates to a method for producing a multi-layer lacquer finish on a metal substrate, wherein a base coat layer or a plurality of base coat layers directly following one another are produced directly on a metal substrate coated with a hardened electrophoretic dip coating, a clear lacquer layer is produced directly on one of or on the uppermost of the plurality of base coat layers, and then the one or the plurality of base coat layers and the clear lacquer layer are hardened together. The method is characterised in that at least one base coat used for producing the base coat layers comprises at least one aqueous polyurethane-polyurea dispersion (PD) containing polyurethane-polyurea particles, wherein the polyurethane-polyurea particles contained in the dispersion (PD) contain anionic groups and/or groups which can be converted into anionic groups and have a mean particle size of 40 to 2000 nm and a gel content of at least 50%. |