Fire resistant gypsum board . . . anhydrite

Details Fire resistant gypsum board . . . anhydrite Fire resistant gypsum board . . . anhydrite

1985-06-11

1987-03-03

Swisher, Nancy

Stock material or miscellaneous articles

Sheet including cover or casing

Encased layer derived from inorganic settable ingredient

501110, 501111, 428703, 428921, B32B 104, B32B 302, B32B 1300

Patent

active

046474862

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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Merck Index, Fifth & Ninth Editions, pp. 113 and 216.

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