Multilayer Coatings and Processes for the Multilayer Coating of Substrates

摘要

The present invention relates to multilayer coatings of an optionally pre-coated substrate and processes for the multilayer coating of substrates. The multilayer coatings comprise a base coat layer of a water-based colour- and/or special effect-imparting base coat composition disposed on the optionally pre-coated substrate. The multilayer coatings further comprise a clear coat layer of a transparent clear coat composition disposed on the base coat layer. The water-based colour- and/or special effect-imparting base coat composition is a water-based coating composition comprising A) at least one water-dilutable polyurethane binder, B) optionally at least one curing agent, and C) at least one pigment. The at least one water-dilutable polyurethane binder is based on at least one polyhydroxyl compound, said polyhydroxyl compound comprises at least 50% by weight of at least one polycarbonate polyol, which is liquid at 20° C., the % by weight are based on the total amount of the polyhydroxyl compound.

主权项

1. A multilayer coating of an optionally pre-coated substrate, wherein the multilayer coating comprises:
I) a base coat layer of a water-based colour- and/or special effect-imparting base coat composition disposed on the optionally pre-coated substrate, and II) a clear coat layer of a transparent clear coat composition disposed on the base coat layer,wherein the water-based colour- and/or special effect-imparting base coat composition is a water-based coating composition comprising
A) at least one water-dilutable polyurethane binder, B) optionally at least one curing agent, and C) at least one pigment, characterised in that the at least one water-dilutable polyurethane binder is based on at least one polyhydroxyl compound, said polyhydroxyl compound comprises at least 50% by weight of at least one polycarbonate polyol, which is liquid at 20° C., the % by weight are based on the total amount of the polyhydroxyl compound.