Paint adhesion by polyvinyl amines in acidic aqueous...

C - Chemistry – Metallurgy – 23 – C

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Details

C23C 22/36 (2006.01) B05D 7/00 (2006.01) C09D 5/08 (2006.01)

Patent

CA 2741729

The invention relates to an aqueous, chromium-free and curable corrosion protection agent for the first coating of metal surfaces, said agent containing at least one organic polymer or copolymer of at least partially acylated vinyl amines, for improving the properties of adhesion of the cured first coating to the metallic surface and to further organic coatings. The invention also relates to a method for producing a first coating comprising the agent according to the invention, and for applying further organic coatings, in particular those based on polyurethane resins and/or based on isocyanates and diols or polyols, and to a metal strip produced in this way or a metal sheet cut off same, which can optionally be shaped.

La présente invention concerne un agent anticorrosion aqueux, sans chrome et durcissable pour le revêtement préliminaire de surfaces métalliques, qui contient, pour améliorer les propriétés dadhésion du revêtement préliminaire durci sur la surface métallique et sur des revêtements organiques supplémentaires, au moins un polymère ou copolymère organique de vinylamines au moins partiellement acylées. Linvention concerne également un procédé de fabrication dun revêtement préliminaire avec lagent selon linvention, ainsi que dapplication de revêtements organiques supplémentaires, notamment à base de résines de polyuréthane et/ou à base disocyanates et de diols ou de polyols, et une bande métallique ainsi fabriquée ou une tôle métallique divisée à partir de celle-ci, qui peut éventuellement être remodelée.

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