Organic-inorganic composite
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United States of America Patent
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May 23, 2006
Grant Date -
Jun 16, 2005
app pub date -
Sep 27, 2004
filing date -
Dec 10, 2003
priority date (Note) -
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Abstract
An inorganic-organic composite comprises an inorganic phase, such as gypsum crystals, and a film forming organic phase. The film forming organic phase is selected from substituted starches having a degree of polymerization; degree of substitution and viscosity such that the substituted starches are insoluble in water during mixing but dissolve at a higher processing temperature during forming, setting or drying of the composite. Thus, excessive migration of the substitute starch is prevented and the composite is substantially strengthened.
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