Method of manufacturing gypsum board with improved fire
AssigneeGold Bond Building Products, LLC
InventorsEli Stav, Jie Ling, Brad Busche, Joseph J. Bailey, R. G. Iyer, Veda Evans
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Abstract
The present disclosure is directed to a method of manufacturing gypsum board as well as the resulting gypsum board. The method comprises providing a gypsum slurry with a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. As a result, the gypsum board includes gypsum and a shrinkage-reducing additive comprising a metal salt of an acid, a silica, or a mixture thereof. The gypsum board exhibits an area shrinkage of less than 10%.
Claims16
A method for manufacturing a gypsum board, the method comprising:
- providing a gypsum slurry including gypsum and an additive comprising a metal salt of an acid comprising barium and a sulfate, a phosphate, or a mixture thereof, wherein the additive is present in an amount of about 0.05 wt. % or more to less than 5 wt. % based on the weight of the gypsum,
- wherein the gypsum board exhibits an area shrinkage of less than 20%.
A gypsum board comprising:
- gypsum and an additive comprising a metal salt of an acid comprising barium and a sulfate, a phosphate, or a mixture thereof, wherein the additive is present in an amount of about 0.05 wt. % or more to less than 5 wt. % based on the weight of the gypsum,
- wherein the gypsum board exhibits an area shrinkage of less than 20%.
Dependencies are inferred from the claim text.