Process for multilayer coating

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 4/00 (2006.01)

Patent

CA 2761159

This invention relates to Process for multilayer coating of substrates, comprising the steps: I) applying a layer of a water-based color-imparting and/or special effect-imparting base coat coating composition to a substrate, II) applying a layer of a clear coat coating composition curable by means of high energy radiation and optionally curable by at least one additional chemical curing reaction, and III) curing said clear coat layer by exposing it to high energy radiation, wherein the clear coat coating composition comprises: A) at least one compound capable of free-radical polymerization having at least one olefinically unsaturated group, B) at least one photoinitiator and C) at least one organic phosphine derivative.

L'invention concerne un procédé de revêtement multicouche de substrats, qui comprend les étapes consistant à : I) appliquer sur un substrat une couche d'une composition de couche de base conférant une couleur à base d'eau et/ou un effet spécial, II) appliquer une couche d'une composition de couche de revêtement transparent pouvant être traitée par un rayonnement de haute énergie, et éventuellement traitée par au moins une réaction de traitement chimique supplémentaire, et III) traiter la couche de revêtement transparent en l'exposant à un rayonnement de haute énergie. La composition de couche de revêtement transparent comprend: A) au moins un composé à polymérisation radicalaire comportant au moins un groupe insaturé d'un point de vue oléfinique, B) au moins un photoamorceur et C) au moins un dérivé de phosphine organique.

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