Gypsum-containing product, and composition, and method for producing a gypsum-containing product
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United States of America Patent
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app pub date -
Sep 21, 2001
filing date -
Aug 21, 1997
priority date (Note) -
Abandoned
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Abstract
The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units. The mixture is then maintained under conditions sufficient for the calcium sulfate material to form a set gypsum material.
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