Coating system for cement composite articles

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 5/00 (2006.01) B32B 13/00 (2006.01)

Patent

CA 2653048

A coated article is provided that includes a cement composite substrate; and a coating system applied to the substrate. The coating system includes an epoxy-functional coating composition applied to the substrate, and a water-based coating composition, distinct from the epoxy-functional coating composition, applied to the epoxy-based coating, between the compositions. A method is also provided that includes the steps of: providing a cement composite substrate; applying an epoxy-functional coating composition to the substrate; and applying a water-based coating composition, distinct from the epoxy-functional coating composition, to the epoxy-based coating. The water-based coating composition used in this method preferably comprises a polymer having one or more functional groups that can react with the epoxy-based coating to promote adhesion between the compositions.

L'invention porte sur un article revêtu comprenant un substrat composite de ciment, et sur un système de revêtement s'appliquant au substrat. Ledit système comprend une composition de revêtement à fonction époxy s'appliquant sur le substrat et une composition aqueuse distincte de la composition de revêtement à fonction époxy et s'appliquant sur le revêtement à base d'époxy. L'invention porte également sur un procédé: consistant: à partir d'un substrat composite de ciment; à appliquer sur le substrat une composition de revêtement à fonction époxy, à appliquer une composition aqueuse distincte de la composition de revêtement à fonction époxy sur le revêtement à base d'époxy. La composition du revêtement aqueuse utilisé dans ce procédé comporte de préférence un polymère à un ou des groupes fonctionnels pouvant réagir avec le revêtement à base d'époxy pour promouvoir l'adhérence entre les compositions.

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