Synthetic gypsum filler based joint compound with low coefficient of friction
AssigneeUnited States Gypsum Company
InventorsDavid Daniel Pelot, Tyler Jared Kincaid, Phanindra Kodali, Scott Daryl Cimaglio, Naveen Punati
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Abstract
A drying-type joint compound and related methods, the drying-type joint compound having a lowered friction coefficient and formulated with chloride-containing flue-gas-desulfurization (FGD) gypsum powder having the median particle size (D50) of at least about 20 μm, preferably the chloride-containing FGD gypsum powder having a D10 greater than 5 μm, wherein the drying-type joint compound further comprises a binder; one or more clays; a cellulosic thickener; and an additive.
Claims19
A drying-type joint compound composition comprising:
- a) chloride-containing flue-gas-desulfurization (FGD) gypsum powder having the median particle size (D50) of at least about 20 μm;
- b) a binder;
- c) one or more clays;
- d) a cellulosic thickener;
- and
- e) an additive.
A method for producing flue-gas-desulfurization (FGD) gypsum powder for use in a drying-type joint compound, the method comprising:
- dewatering a slurry comprising chloride-containing FGD gypsum into dewatered chloride-containing FGD gypsum, wherein the resulting chloride-containing FGD gypsum powder contains from about 500 PPM to about 20,000 PPM of chloride.
Dependencies are inferred from the claim text.