Efficient set accelerator for plaster
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
Feb 11, 2000
filing date -
Feb 11, 2000
priority date (Note) -
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Abstract
A set accelerator 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 set accelerator consists of a mixture of ground calcium sulfate dihydrate and zinc sulfate material. Aluminum sulfate material is an optional component of the set accelerator. The set accelerator is particularly useful in accelerating the hydration rates of sprayable plasters. A fluid form of the set accelerator may be made by suspending the solids in water. The fluid form is advantageously used in ready mixed setting type joint compounds.
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