Method for coating metallic surfaces, coating composition,...

C - Chemistry – Metallurgy – 09 – D

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Details

C09D 5/08 (2006.01) C08F 251/02 (2006.01) C09D 4/00 (2006.01) C09D 4/06 (2006.01)

Patent

CA 2513003

Disclosed is a method for coating surfaces of metallic substrates with an organic, anionically, cationically, or/and radically hardenable anti-corrosive composition that represents a dispersion or solution containing at least two components selected among the group of monomers, oligomers, and polymers which can at least partly be anionically, cationically, or/and radically hardened, the content of at least one monofunctional monomer or/and oligomer in said anti-corrosive composition ranging between 1 and 50 percent by weight. The inventive anti-corrosive composition further comprises at least one photoinitiator used for anionic, cationic, or/and radical crosslinking, and a first, organic corrosion inhibitor. The anti-corrosive composition is applied to the metallic surfaces at a wet film thickness ranging from 1 to 25 micrometers, is optionally dried, and is then anionically, cationically, or/and radically hardened in order to obtain an anti-corrosive coating.

L'invention concerne un procédé permettant de recouvrir des surfaces de substrats métalliques avec une composition de protection contre la corrosion organique, durcissable par voie anionique, cationique et/ou radicalaire. Ladite composition de protection contre la corrosion est une dispersion ou une solution contenant au moins deux composants sélectionnés dans le groupe des monomères, des oligomères et des polymères, pouvant durcir au moins en partie par voie anionique, cationique et/ou radicalaire. Ladite composition comprend une teneur en au moins un monomère et/ou oligomère monofonctionnel comprise entre 1 et 50 % en poids. Ladite composition de protection contre la corrosion contient en outre au moins un photo-initiateur de réticulation par voie anionique, cationique et/ou radicalaire et un premier inhibiteur de corrosion organique. La composition de protection contre la corrosion est appliquée sur les surfaces métalliques, dans une épaisseur de film humide de l'ordre de 1 à 25 micromètres, elle est éventuellement séchée, puis durcie par voie anionique, cationique et/ou radicalaire, pour former un revêtement de protection contre la corrosion.

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