Foamed slurry and building panel made therefrom
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United States of America Patent
Stats
-
Jan 3, 2012
Grant Date -
Jan 3, 2008
app pub date -
Aug 17, 2007
filing date -
Jun 14, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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.
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Cited Art Landscape
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