US Patent Issued to The Hong Kong Polytechnic University on March 24 for "Geopolymer-based sub-ambient daytime radiative cooling coating" (Chinese Inventors)

ALEXANDRIA, Va., March 24 -- United States Patent no. 12,584,057, issued on March 24, was assigned to The Hong Kong Polytechnic University (Hong Kong).

"Geopolymer-based sub-ambient daytime radiative cooling coating" was invented by Jianguo Dai (Hong Kong) and Ning Yang (Hong Kong).

According to the abstract* released by the U.S. Patent & Trademark Office: "Sub-ambient daytime radiative cooling (SDRC) coating comprising: an alkali activated metakaolin, BaSO4, and silica nanospheres, wherein the alkali activated metakaolin is prepared by reaction of metakaolin with an alkali activator comprising waterglass and a strong base selected from the group consisting of LiOH, NaOH, KOH, Ca(OH)2, Li2O Na2O, K2O, CaO, and a mixture thereof, a coating...