Plaster composition and method of making same
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United States of America Patent
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Apr 25, 2006
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N/A
app pub date -
Feb 2, 2005
filing date -
Aug 7, 2002
priority date (Note) -
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Abstract
The present invention provides a plaster composition that includes calcined gypsum and a naphthalene sulfonate-aldehyde condensate alkali salt polymer having a weight average molecular weight from about 17,000 to about 47,000. The present invention also provides a method of forming a plaster composition that includes belending calcined gypsum and a naphthalene sulfonate-aldehyde condensate alkali salt polymer having a weight average molecular weight from about 17,000 to about 47,000 together to form a dry blend and contacting the dry blend with water to form a hardenable aqueous slurry.
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