US 12,269,962 B2
Stable coating compositions and methods of preparing and using the same
John E. Hughes, Lincoln University, PA (US); Linzhu Zhang, Ephrata, PA (US); and Lori Jo L. Shearer, Millersville, PA (US)
Assigned to AWI Licensing LLC, Wilmington, DE (US)
Filed by ARMSTRONG WORLD INDUSTRIES, INC., Lancaster, PA (US)
Filed on Feb. 28, 2023, as Appl. No. 18/115,701.
Claims priority of provisional application 63/315,365, filed on Mar. 1, 2022.
Prior Publication US 2023/0279257 A1, Sep. 7, 2023
Int. Cl. C09D 157/00 (2006.01); C09D 1/00 (2006.01); C09D 7/20 (2018.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01)
CPC C09D 157/00 (2013.01) [C09D 1/00 (2013.01); C09D 7/20 (2018.01); C09D 7/61 (2018.01); C09D 7/63 (2018.01)] 17 Claims
OG exemplary drawing
 
1. A coating composition comprising:
calcium carbonate;
titanium dioxide;
opacity pigment composite comprising TiO2 encapsulated within a precipitated calcium carbonate shell;
calcined diatomaceous earth;
calcium chloride;
aluminum hydroxide; and
vinyl acrylic polymer,
wherein the weight ratio of calcium carbonate and calcined diatomaceous earth to vinyl acrylic polymer is from about 3:1 to about 15:1, from about 4:1 to about 12:1, from about 5:1to about 10:1, or from about 5:1 to about 8.5:1, based on the dry weight of the composition.