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US 11,370,925 B2Granted
Infrared fluorescent coatings
AssigneePPG Industries Ohio, Inc.
InventorsMichael A. Zalich, Paul H. Berdahl, Stuart D. Hellring, William H. Retsch, Jr.
Life of this patent
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Abstract
A coating composition includes: (i) a film-forming resin; (ii) an infrared reflective pigment; and (iii) an infrared fluorescent pigment or dye different from the infrared reflective pigment. A multi-layer coating including the coating composition, and a substrate at least partially coated with the coating composition is also disclosed. A method of detecting an article at least partially coated with the coating composition is also disclosed.
Claims19
A coating composition comprising:
- a film-forming resin;
- an infrared reflective pigment;
- and
- an infrared fluorescent pigment or dye different from the infrared reflective pigment,
- wherein the coating composition, when cured to form a coating and exposed to radiation comprising fluorescence-exciting radiation, emits fluorescence in the infrared spectrum, and
- wherein the fluorescence emitted by the infrared fluorescent pigment within the coating can be detected by a sensor.
3 more elements
A method of detecting an article comprising:
- exposing a surface of an article to radiation comprising fluorescence-exciting radiation, the surface being at least partially coated with a coating composition comprising:
- (i) a film-forming resin, (ii) an infrared reflective pigment, and (iii) an infrared fluorescent pigment or dye different from the infrared reflective pigment;
- and
- detecting fluorescence emitted by the coated surface in the infrared spectrum.
1 more element
Dependencies are inferred from the claim text.