Gypsum-based floor underlayment
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United States of America Patent
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Jan 26, 2010
Grant Date -
Oct 15, 2009
app pub date -
Apr 10, 2008
filing date -
Apr 10, 2008
priority date (Note) -
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Abstract
A flooring composition for mixing with water to produce a self-leveling slurry that quickly hydrates to form a high strength floor underlayment comprising a dry mixture of (1) beta gypsum produced by a continuous method; (2) Class C fly ash; (3) a conventional water reducing aid such as sulfonated melamines, sulfonated naphthalenes and their related formaldehyde condensates, and (4) a conventional set retarder.
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