Fire resistant gypsum board . . . anhydrite
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United States of America Patent
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-
Mar 3, 1987
Issued Date -
N/A
app pub date -
Jun 11, 1985
filing date -
Dec 28, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Increased fire resistant gypsum board core formulations and plaster fireproofing formulations are provided by incorporating calcium sulfate anhydrite into the formulations. Particularly fire resistant effects are achieved with a fibrous form of calcium sulfate anhydrite, and with blends of calcium sulfate anhydrite II in particulate or fibrous form. Optionally, the formulations may contain either small amounts of textile glass fiber, wollastonite or vermiculite.
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