Infrared fluorescent coatings

Zalich, Michael Andrew; Baxter, Michael F.; Berdahl, Paul H.; Hellring, Stuart D.; Stalker, Jeffrey Lynn

Title: Infrared fluorescent coatings

Patent · Tue Feb 21 00:00:00 EST 2023

OSTI ID:1987138

Zalich, Michael Andrew; Baxter, Michael F.; Berdahl, Paul H.; Hellring, Stuart D.; Stalker, Jeffrey Lynn

The present invention provides for a composition comprising a pigment, wherein the composition is suitable for coating a surface that is, or is expected to be, exposed to the sun. The pigment comprises particles that fluoresce in sunlight, thereby remaining cooler in the sun than coatings pigmented with non-fluorescent particles. The particles comprise solids that fluoresce or glow in the visible or near infrared (NIR) spectra, or that fluoresce when doped. Suitable dopants include, but are not limited to, ions of rare earths and transition metals. A coating composition includes: (i) a film-forming resin; (ii) an infrared reflective pigment; and (iii) an infrared fluorescent pigment different from the infrared reflective pigment. When the coating composition is cured to form a coating and exposed to radiation comprising fluorescence-exciting radiation, the coating has a greater effective solar reflectance (ESR) compared to the same coating exposed to the radiation comprising fluorescence-exciting radiation except without the infrared fluorescent 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 reducing temperature of an article includes applying the coating composition to at least a portion of the article.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); PPG Industries Ohio, Inc., Cleveland, OH (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC02-05CH11231; EE0006347

Assignee:: PPG Industries Ohio, Inc. (Cleveland, OH); The Regents of the University of California (Oakland, CA)

Patent Number(s):: 11,584,860

Application Number:: 17/162,284

OSTI ID:: 1987138

Resource Relation:: Patent File Date: 01/29/2021

Country of Publication:: United States

Language:: English

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