Coating composition curable with ultraviolet radiation

Details Coating composition curable with ultraviolet radiation Coating composition curable with ultraviolet radiation

B - Operations, Transporting

05

D

B05D 7/00 (2006.01) B05D 3/06 (2006.01) C05D 3/02 (2006.01) C08F 222/10 (2006.01) C08F 290/14 (2006.01) C09D 4/00 (2006.01) C09D 4/06 (2006.01) C09D 201/02 (2006.01)

Patent

CA 2526177

A clearcoat curable by ultraviolet radiation including at least one of A) acrylate or methacrylate monomers or mixtures thereof having from one to six free-radically polymerizable groups per molecule or B) compounds containing two or more ethylenically unsaturated, free radically polymerizable groups per molecule and mixtures thereof or mixtures of A) and B). The coating may optionally include photoinitiators, volatile organic solvent(s) and customary additives. The invention further provides a process for applying the clearcoat to a substrate. In a preferred embodiment the process according to the present invention includes low energy curing of a clearcoat applied to a substrate by means of a UV light source utilizing UVA/UVV or UVA only and involves essentially no UVB or UVC radiation.

L'invention concerne un enduit lustré durcissable par rayonnement ultraviolet, comprenant au moins un des composants suivants: A) monomères d'acrylate ou de méthacrylate ou mélanges de ceux-ci, comprenant de un à six groupes polymérisables par voie radicalaire par molécule, ou B) composés contenant au moins deux groupes insaturés polymérisables par voie radicalaire par molécule et des mélanges de A) et de B). Ce revêtement peut en outre contenir des photoamorceurs, un ou plusieurs solvants organiques volatils, et des additifs d'utilisation courante. L'invention concerne en outre un procédé permettant l'application de cet enduit lustré sur un substrat. Dans un mode de mise en oeuvre préféré, ce procédé comprend un durcissement à faible énergie de l'enduit lustré appliqué sur un substrat, au moyen d'une source de rayonnement UV à base d'UVA/UVV, ou uniquement d'UVA, et n'émettant sensiblement aucun rayonnement UVB ou UVC.

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