	US 12,264,264 B2
	Coating composition
John E Hughes, Lincoln University, PA (US); and Suzanne M Huntzinger, Lancaster, PA (US)
Assigned to AWI Licensing LLC, Wilmington, DE (US)
Filed by ARMSTRONG WORLD INDUSTRIES INC., Lancaster, PA (US)
Filed on May 10, 2023, as Appl. No. 18/195,844.
Application 18/195,844 is a division of application No. 16/991,566, filed on Aug. 12, 2020, granted, now 11,685,837.
Claims priority of provisional application 62/885,430, filed on Aug. 12, 2019.
Prior Publication US 2023/0279245 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 7/62 (2018.01); C08K 13/06 (2006.01); C09D 131/04 (2006.01); C09D 133/08 (2006.01)

CPC C09D 7/62 (2018.01) [C09D 131/04 (2013.01); C09D 133/08 (2013.01); C08K 13/06 (2013.01)]

7 Claims

1. A coating composition comprising:

a liquid carrier;

a binder; and

a pigment composition comprising:

titanium dioxide;

an alkali metal silicate;

a clay; and

one or more alkaline earth metal carbonates comprising magnesium carbonate and calcium carbonate;

wherein the one or more alkaline earth metal carbonates is present in an amount ranging from about 60.0 wt. % to about 80.0 wt. % based on the total weight of the pigment composition; and

wherein the calcium carbonate and the magnesium carbonate are present in a weight ratio ranging from about 3:1 to about 6:1.