Low-yellowing aqueous clear powder coating dispersions, method of making the dispersions, and process for producing clearcoat finishes with the dispersions

   
   

The present invention relates to a process for producing single-coat or multicoat clearcoat finishes on primed or unprimed substrates by applying at least one powder coating dispersion, in particular a powder clearcoat slurry, to the substrate and then curing the resulting film(s) thermally and/or with actinic radiation, in which oxalic acid is added to at least one powder coating dispersion, in particular to a powder clearcoat slurry.

La présente invention concerne un procédé pour la production du simple-manteau ou le clearcoat de multicoat finit sur amorcé ou unprimed des substrats en appliquant au moins une dispersion enduisante de poudre, en particulier une boue de clearcoat de poudre, au substrat et puis à traiter le film(s) résultant thermiquement et/ou avec le rayonnement actinique, dans lequel l'acide oxalique est ajouté au moins à une dispersion enduisante de poudre, en particulier à une boue de clearcoat de poudre.

 
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