Cementitious article and method for preparing the same

Details Cementitious article and method for preparing the same Cementitious article and method for preparing the same

C - Chemistry, Metallurgy

04

B

C04B 28/14 (2006.01)

Patent

CA 2757262

A cementitious article and a method of making a cementitious article are disclosed. The cementitious article com-prises a cementitious component that comprises a polyvinyl acetate type polymer, a monobasic phosphate, and optionally boric acid. Cementitious articles, such as board, are prepared such that the polyvinyl acetate type polymer, the monobasic phosphate, and optionally boric acid can be present in the cementitious core, and/or in dense layers if present. The concentration of the polyvinyl acetate type polymer, monobasic phosphate, and optionally boric acid in the cementitious article can increase from a central region (A) to peripheral regions (B) and (C), respectively. In some embodiments, the polyvinyl acetate type polymer is a polyvinyl alcohol and the monobasic phosphate is monoammonium phosphate.

La présente invention concerne un article cimentaire et un procédé de fabrication d'un article cimentaire. L'article cimentaire comprend un composant cimentaire comprenant un polymère de type acétate de polyvinyle, un phosphate monobasique, et éventuellement de l'acide borique. Les articles cimentaires, tels qu'un panneau, sont préparés de sorte que le polymère de type acétate de polyvinyle, le phosphate monobasique, et éventuellement l'acide borique soient présents dans le noyau cimentaire, et/ou dans des couches denses si elles sont présentes. La concentration en polymère de type acétate de polyvinyle, en phosphate monobasique, et éventuellement en acide borique dans l'article cimentaire peut augmenter à partir d'une région centrale (A) vers des régions périphériques (B) et (C), respectivement. Dans certains modes de réalisation, le polymère de type acétate de polyvinyle est un alcool polyvinylique et le phosphate monobasique est un phosphate de monoammonium.

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