C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
261/79
C04B 22/14 (2006.01) C04B 20/10 (2006.01) C04B 28/14 (2006.01) C04B 40/00 (2006.01)
Patent
CA 2333340
A catalyst for at least one of accelerating the hydration rate and reducing the set time of an aqueous slurry of calcium sulfate hemihydrate is described. The catalyst consists of a mixture of ground calcium sulfate dihydrate and zinc sulfate material. Aluminum sulfate material is an optional component of the catalyst. The catalyst is particularly useful in accelerating the hydration rates of sprayable plasters. A fluid form of the catalyst may be made by suspending the solids in water. The fluid form is advantageously used in ready mixed setting type joint compounds.
Le catalyseur décrit permet au moins d'accélérer le taux d'hydratation et de réduire le temps de préparation d'une suspension aqueuse de sulfate de calcium semi-hydrate. Le catalyseur est un mélange de sulfate de calcium dihydrate moulu et sulfate de zinc. Le sulfate d'aluminium est un composant facultatif du catalyseur. Le catalyseur est particulièrement utile pour accélérer les taux d'hydratation des plâtres pulvérisables. Le catalyseur peut être produit sous forme fluide par suspension des solides dans l'eau. L'utilisation de la forme liquide est avantageuse dans les préparations de pâtes à joint pré-mélangées.
Espinoza Therese
Immordino Salvatore C.
Miller Charles J.
Stevens Richard B.
Company United States Gypsum
Moffat & Co.
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