C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
C04B 28/16 (2006.01) B32B 13/04 (2006.01)
Patent
CA 2694958
A gypsum slurry is described that includes water, a hydraulic component comprising at least 50% calcined gypsum by weight based on the dry weight of the hydraulic component, foam, a defoamer and a polycarboxylate dispersant In some embodiments of the invention, the defoamer is combined with the dispersant prior to being added to the gypsum slurry The defoamer and dispersant can be added as a physical mixture, wherein the defoamer is attached onto the dispersant polymer, or a combination thereof In some embodiments, a gypsum building panel is made from the gypsum slurry.
L'invention concerne une suspension de gypse qui comprend de l'eau, un composant hydraulique comportant au moins 50 % en poids de gypse calciné par rapport au poids sec du composant hydraulique, une mousse, un agent anti-mousse et un dispersant polycarboxylate. Dans certains modes de réalisation de l'invention, l'agent anti-mousse est combiné au dispersant avant d'être ajouté à la suspension de gypse. L'agent anti-mousse et le dispersant peuvent être ajoutés sous forme de mélange physique, l'agent anti-mousse étant attaché sur le dispersant polymère ou une combinaison de celui-ci. Dans certains modes de réalisation, un panneau de construction à base de gypse est préparé à partir de la suspension de gypse.
Blackburn David R.
Fall John L.
Lee Chris
Li Alfred
Liu Qingxia
Company United States Gypsum
Moffat & Co.
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