Gypsum-based mortars using water retention agents prepared...

Details Gypsum-based mortars using water retention agents prepared... Gypsum-based mortars using water retention agents prepared...

C - Chemistry, Metallurgy

04

B

C04B 24/38 (2006.01) C04B 28/14 (2006.01)

Patent

CA 2563451

A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a gypsum based dry mortar composition wherein the amount of the cellulose ether in the gypsum based dry mortar composition is significantly reduced. When this gypsum based dry mortar composition is mixed with water and applied to a substrate, the water retention, sag resistance, and workability of the wet plaster mortar are comparable or improved as compared to when using conventional similar cellulose ethers.

L'invention concerne une composition mélangée d'éther de cellulose fabriqué à partir de bourre de coton brut et d'au moins un additif, utilisée dans une composition de mortier sec à base de gypse dans laquelle la quantité d'éther de cellulose est sensiblement réduite. Lorsque cette composition de mortier sec à base de gypse est mélangée à de l'eau et appliquée sur un substrat, les propriétés de rétention d'eau, de résistance au gauchissement et de transformabilité du mortier au plâtre humide sont comparables voire supérieures à celles d'une composition de mortier dans laquelle des éthers de cellulose similaires classiques sont utilisés.

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