Electrodeposition coatings for use over aluminum substrates

C - Chemistry – Metallurgy – 08 – G

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Details

C08G 59/30 (2006.01) C09D 5/24 (2006.01)

Patent

CA 2696158

A process for applying a coating on aluminum substrates by anionic electrodeposition of a phosphated epoxy resin made by phosphating a polyepoxide with both phosphoric acid and an organophosphonic acid and/or an organophosphinic acid. The coating has a reduced tendency to form pinholes.

L'invention concerne un procédé pour appliquer un revêtement sur des substrats en aluminium par électrodépôt anionique d'une résine époxy phosphatée préparée en phosphatant un poly(époxyde) avec à la fois de l'acide phosphorique et un acide organophosphorique et/ou un acide organophosphinique. Le revêtement a une tendance réduite à former des sténopés.

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