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 gypsum powder having the median particle size (D50) of at least about 20 μm, preferably the gypsum powder has 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.
Claims20
A drying-type joint compound composition comprising:
- a) 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 optimizing a friction coefficient of a drying-type joint compound, the method comprising:
- grinding gypsum mineral fragments into gypsum powder with the median particle size distribution D50 of at least about 20 μm.
A method for treating a seam between adjacent wallboard panels and/or for treating a wallboard panel surface, the method comprising:
- i. filling the seam with a drying-type joint compound and/or applying the drying-type joint compound over the wallboard panel surface, the drying-type joint compound comprising:
- a) 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;
- e) an additive;
- and
- f) water;
- and
- ii. after the applied joint compound dries, sanding the dried joint compound.
Dependencies are inferred from the claim text.