C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
C09K 3/18 (2006.01) C09D 5/02 (2006.01) C09D 123/00 (2006.01) C09D 133/02 (2006.01) C09D 191/06 (2006.01)
Patent
CA 2121208
There is provided a water based water repellent coating composition, method of making and method of use. The coating composition comprises an emulsion having water as the continuous phase and, as the discontinuous phase, droplets of a nonvolatile organic water repellent composition, the emulsion containg an emulsion stabilizing amount of a hydrophobically modified polyacrylic acid polymer wherein the viscosity of the emulsion is less than about 100 Cps and the particle size of the droplets is less than about 50 microns. The relatively low viscosity and small particle size provides for easy application and excellent penetration into porous substrates. The process of making the compositions involves the making of a conventional emulsion of this type and then high kinetic energy processing so as to produce the desired viscosity and particle size. The method of use involves the application of the composition to a substrate followed by evaporation of the water and any volatile components from the composition.
Composition de revêtement à l'eau hydrofuge, méthode de fabrication et méthode d'utilisation de cette composition. La composition de revêtement comprend une émulsion ayant l'eau comme phase continue et, comme phase discontinue, des gouttelettes d'une composition organique hydrofuge non volatile, l'émulsion contenant, comme stabilisant, une quantité suffisante d'un polymère d'acide polyacrylique modifié hydrophobiquement; la viscosité de l'émulsion est inférieure à environ 100 Cps et la taille des gouttelettes est inférieure à environ 50 micromètres. La viscosité relativement faible et la petite taille des gouttelettes permettent une application facile et une excellente pénétration dans les substrats poreux. Le procédé de fabrication des compositions comporte la production d'une émulsion traditionnelle de ce type et, ensuite, un traitement à haute énergie cinétique de manière à produire la viscosité et la granulométrie recherchées. La méthode d'utilisation comporte l'application de la composition sur un substrat suivie de l'évaporation de l'eau et de tout constituant volatil de la composition.
Czekai David Alan
Powell Jeffery E. G.
Scarborough Victoria Denise
Gowling Lafleur Henderson Llp
Thompson Minwax Company (the)
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