Modifiers for gypsum slurries and method of using them
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United States of America Patent
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Apr 26, 2011
Grant Date -
Nov 26, 2009
app pub date -
Jul 30, 2009
filing date -
Jun 14, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved gypsum slurry that includes water, calcium sulfate hemihydrate, a polycarboxylate dispersant and a modifier. The modifier is chemically configured to improve the efficacy of the polycarboxylate dispersant. Preferred modifiers include cement, lime, slaked lime, soda ash, carbonates, silicates and phosphates.
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