US 12,291,485 B2
Gypsum cement compositions with aggregate stabilizers and methods for forming floor underlayment
Karl Glenn Niessner, Mundelein, IL (US); Dennis Mark Lettkeman, Broken Arrow, OK (US); John Wesley Wilson, Fairview, OK (US); and William Kelly Bedwell, Okeene, OK (US)
Assigned to UNITED STATES GYPSUM COMPANY, Chicago, IL (US)
Filed by United States Gypsum Company, Chicago, IL (US)
Filed on Jun. 20, 2022, as Appl. No. 17/844,403.
Claims priority of provisional application 63/246,017, filed on Sep. 20, 2021.
Prior Publication US 2023/0110018 A1, Apr. 13, 2023
Int. Cl. C04B 28/14 (2006.01); C04B 14/06 (2006.01); C04B 24/14 (2006.01); C04B 24/26 (2006.01); C04B 24/38 (2006.01); C04B 40/00 (2006.01); C04B 40/06 (2006.01); C04B 103/12 (2006.01); C04B 103/22 (2006.01); C04B 103/40 (2006.01); C04B 103/50 (2006.01); C04B 111/00 (2006.01); C04B 111/60 (2006.01)
CPC C04B 28/14 (2013.01) [C04B 14/06 (2013.01); C04B 24/14 (2013.01); C04B 24/2641 (2013.01); C04B 24/2652 (2013.01); C04B 24/38 (2013.01); C04B 40/0042 (2013.01); C04B 40/0608 (2013.01); C04B 2103/12 (2013.01); C04B 2103/22 (2013.01); C04B 2103/408 (2013.01); C04B 2103/50 (2013.01); C04B 2111/00146 (2013.01); C04B 2111/60 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A composition for producing a gypsum cement slurry, the composition comprising:
a) calcium sulfate hemi-hydrate;
b) cement;
c) a dispersant;
d) a defoamer; and
e) an aggregate stabilizing mixture, wherein the aggregate stabilizing mixture comprises:
a polysaccharide gum in an amount from 0.001% to 0.5% by weight of the composition, and
a polyacrylamide-gelatin blend in an amount from 0.00125% to 0.01% by weight of the composition; and
wherein the composition is a dry mixture.