verfaheren to manufacture a klarlacks on a car

摘要

A process for the production of a clear top coat layer on automotive bodies comprises the following steps: a) spray application onto at least portions of the precoated surface of the automotive bodies, that are not directly accessible to an external observer but are in principle accessible to spray coating, of a clear coat layer from a clear coating composition A curable by free-radical polymerization of olefinic double bonds on exposure to UV radiation, b) spray application onto the outer surface, finished in color-determining manner, of the automotive bodies, which surface is directly accessible to an external observer and to spray coating, of a clear coat layer from a clear coating composition B curable by free-radical polymerization of olefinic double bonds on exposure to UV radiation, and c) curing of the clear coat layers by UV radiation-induced, free-radical polymerization of olefinic double bonds, wherein the clear coating compositions A and B, differ from one another (1) by having a higher content of photoinitiator(s) or (2) by having a lower content of light stabilizer(s) and/or UV absorber(s) or (3) by having a lower content of light stabilizer(s) and/or UV absorber(s) with compositions A and B having a different content of photoinitiator(s).