GYPSUM BOARDS PREPARED USING UNCALCINED GYPSUM AND SLURRIES AND METHODS RELATED THERETO
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United States of America
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Issued Date -
Mar 20, 2025
app pub date -
Jun 20, 2024
filing date -
Jun 20, 2024
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Abstract
Disclosed are gypsum boards, slurries, and methods of preparing gypsum board using water, uncalcined gypsum, stucco, and starch binder. The board contains a set gypsum core disposed between two cover sheets. The uncalcined gypsum and starch binder surprisingly and unexpectedly allows for the use of uncalcined gypsum while maintaining desired characteristics in gypsum wallboard, such as low board weight, sufficient strength, score/snap, fire resistance, etc. In embodiments, the presence of the uncalcined gypsum with the starch binder in the core slurry allows for excluding an amount of stucco therein.
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