Self-etching cementitious substrate coating composition

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 201/00 (2006.01) C08K 5/54 (2006.01) C09D 201/10 (2006.01)

Patent

CA 2732835

Coating compositions for cementitious substrates may be made from a multistage latex polymer, silane, and a wa-ter-soluble acid, acid anhydride or acid salt capable of etching or otherwise reacting with the surface of the substrate to provide coating adhesion The silane my be present as a silane coupling agent distinct from the multistage latex polymer, or may be present as silane functionality on the multistage latex polymer The coating compositions adhere well to cementitious substrates and have a self-etching capability to provide coating adhesion, especially near edges and corners

L'invention concerne des compositions de revêtement pour des substrats de ciment qui peuvent être réalisées à partir d'un polymère de latex à phases multiples ; de silane ; et d'un acide hydrosoluble, d'un anhydride d'acide ou d'un sel acide capable de graver ou de réagir sinon avec la surface du substrat pour fournir une adhérence de revêtement améliorée. Le silane peut être présent en tant qu'agent de couplage au silane distinct du polymère de latex à phases multiples, ou peut être présent sous la forme d'une fonctionnalité de silane sur le polymère de latex à phases multiples. Les compositions de revêtement adhèrent bien aux substrats de ciment, et ont une capacité de mordançage automatique qui améliore une adhérence de revêtement, en particulier à proximité de bords et de coins.

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