	US 11,746,241 B2
	Antifungal/antibacterial hydrophilic coating
Barbara M. Peyton, Windsor, CT (US); Carol L. Metselaar, Vernon, CT (US); and John W. Steele, New Hartford, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jan. 14, 2020, as Appl. No. 16/742,666.
Prior Publication US 2021/0214562 A1, Jul. 15, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. C09D 1/00 (2006.01); F28F 13/18 (2006.01); C09D 7/40 (2018.01); C09D 7/61 (2018.01)

CPC C09D 1/00 (2013.01) [C09D 7/61 (2018.01); C09D 7/69 (2018.01); F28F 13/182 (2013.01); F28F 2245/02 (2013.01); F28F 2265/20 (2013.01)]

9 Claims

1. A method for coating heat transfer surfaces of a condensing heat exchanger comprising applying a coating slurry comprising an adhesive agent; an insolubilizer for insolubilizing the adhesive agent; titanium dioxide; and a metal oxide selected from the group consisting of silver oxide, copper oxide, iron oxide, magnesium oxide, and combinations thereof to form a coating; and curing the coating;

wherein curing the coating comprises heating the coating to 175 to 185° C. for 20 to 40 minutes, raising the temperature to 190 to 210° C. for 60 minutes, then increasing the temperature to 215 to 225° C. for 30 minutes, then increasing the temperature to 245 to 255° C., then increasing the temperature to 290 to 310° C. for 60 minutes, and finally maintaining the temperature at about 490 to 510° C. for 2 hours.