C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 41/63 (2006.01) C04B 41/48 (2006.01)
Patent
CA 2206098
A method of producing an opaque adherent coating on the surface of a substantially hydrated cementitious substrate is provided. A waterborne storage stable sealer comprising an aqueous medium containing a binder polymer and an opacifying polymer is applied on the surface of such a cementitious substrate. Upon drying the layer substantially hides the primary efflorescence typically present on the surface of the cementitious substrate. Applicants have unexpectedly discovered that by optimally adjusting the thickness of the coating a weight amount of waterborne storage stable sealer solids in the waterborne storage stable sealer and a pigment volume content of the opacifying polymer in the storage stable sealer the opaque adherent coating is produced on the surface of the substantially hydrated cementitious substrate.
Méthode pour l'obtention d'un revêtement adhérent opaque sur la surface d'un substrat cimentaire fortement hydraté. Un agent d'étanchéité aqueux, stable au stockage, renfermant un milieu aqueux avec un polymère liant et un polymère opacifiant est appliqué à la surface dudit substrat cimentaire. Après séchage, la couche cache en grande partie l'efflorescence primaire, généralement présente à la surface du substrat cimentaire. Les déposants ont constaté inopinément qu'en ajustant de façon optimale l'épaisseur du revêtement, la masse des solides scellants aqueux stables au stockage dans l'agent d'étanchéité et la teneur volumique en pigments dans le polymère opacifiant du scellant stable au stockage, on obtient le revêtement adhérent opaque à la surface du substrat cémentaire fortement hydraté.
Matt Richard Barry
Reilly Joseph Clark
Gowling Lafleur Henderson Llp
Matt Richard Barry
Reilly Joseph Clark
Rohm And Haas Company
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