US 12,297,371 B2
Antimicrobial and antiviral building panels
Michelle X. Wang, Lititz, PA (US); Ying Chang, Lancaster, PA (US); John E. Hughes, Lincoln University, PA (US); Linzhu Zhang, Pittsburgh, PA (US); and Steven L. Masia, Lancaster, PA (US)
Assigned to AWI Licensing LLC, Wilmington, DE (US)
Filed by ARMSTRONG WORLD INDUSTRIES, INC., Lancaster, PA (US)
Filed on Dec. 1, 2021, as Appl. No. 17/540,146.
Claims priority of provisional application 63/120,862, filed on Dec. 3, 2020.
Prior Publication US 2022/0177711 A1, Jun. 9, 2022
Int. Cl. C09D 5/14 (2006.01); B05D 3/00 (2006.01); C08K 3/38 (2006.01); C09D 7/61 (2018.01); E04B 9/00 (2006.01)
CPC C09D 5/14 (2013.01) [C09D 7/61 (2018.01); E04B 9/001 (2013.01); B05D 3/007 (2013.01); B05D 2256/00 (2013.01); C08K 3/38 (2013.01); C08K 2003/387 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A building panel comprising:
a substrate; and
a coating applied to the substrate, the coating comprising a blend of:
an antimicrobial composition present in an amount ranging from about 2 wt. % to about 15 wt. %, based on the total dry-weight of the coating;
a polymeric binder comprising carboxylated polyvinyl acetate homopolymer;
a rheology modifier comprising hydroxyethyl cellulose;
a flame retardant comprising aluminum hydroxide; and
a pigment blend;
a hydrophobic agent comprising paraffin wax and polyethylene;
wherein the antimicrobial composition consists of zinc borate.