US 12,134,709 B2
Coatings for sterilization with UV light
Andrew Michael Zweig, Chesterfield, MO (US)
Assigned to The Boeing Company, Chicago, IL (US)
Filed by The Boeing Company, Chicago, IL (US)
Filed on Jul. 9, 2019, as Appl. No. 16/506,560.
Prior Publication US 2021/0009819 A1, Jan. 14, 2021
Int. Cl. C09D 5/32 (2006.01); A61L 2/10 (2006.01); A61L 101/46 (2006.01); C08K 5/00 (2006.01); C08K 5/13 (2006.01); C08L 27/18 (2006.01); C08L 77/00 (2006.01); C09D 5/14 (2006.01); C09D 7/40 (2018.01); C09D 175/04 (2006.01)
CPC C09D 5/32 (2013.01) [A61L 2/10 (2013.01); C09D 7/67 (2018.01); C09D 7/68 (2018.01); C09D 175/04 (2013.01); A61L 2101/46 (2020.08); A61L 2202/25 (2013.01); C08K 5/005 (2013.01); C08K 5/13 (2013.01); C08K 2201/003 (2013.01); C08K 2201/005 (2013.01); C08K 2201/011 (2013.01); C08L 27/18 (2013.01); C08L 77/00 (2013.01); C08L 2201/10 (2013.01); C09D 5/14 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An article comprising:
a substrate having an external surface; and
a coating composition on the external surface, wherein the coating composition consists of:
a crosslinked aliphatic polyurethane; and
nanoparticles having an average particle size of from about 30 nm to about 400 nm and absorbing light having a wavelength of from about 100 nm to about 290 nm, wherein the nanoparticles are present in an amount of about 5, 10, or 20 weight percent of total solids in the coating composition and the nanoparticles consist of one or more of a polytetrafluoroethylene (PTFE) or a polyamide, and
optionally an ultraviolet (UV) light blocking agent,
wherein the article comprises a toilet, a sink, a floor, a countertop, a table top, a cabinet door, a door handle, a faucet, a drawer handle, or a cabinet knob, each article located inside an aircraft lavatory.