US 12,129,402 B2
Liquid composition for optical filters and optical filter
Yuichiro Kubo, Tokyo (JP); Lei Cai, Kanagawa (JP); Hitomi Masuda, Tokyo (JP); and Katsuhide Shimmo, Kanagawa (JP)
Assigned to NIPPON SHEET GLASS COMPANY, LIMITED, Tokyo (JP)
Appl. No. 17/274,999
Filed by Nippon Sheet Glass Company, Limited, Tokyo (JP)
PCT Filed Aug. 27, 2019, PCT No. PCT/JP2019/033577
§ 371(c)(1), (2) Date Mar. 10, 2021,
PCT Pub. No. WO2020/054400, PCT Pub. Date Mar. 19, 2020.
Claims priority of application No. 2018-169609 (JP), filed on Sep. 11, 2018.
Prior Publication US 2022/0057556 A1, Feb. 24, 2022
Int. Cl. G02B 5/22 (2006.01); C08G 77/08 (2006.01); C08G 77/18 (2006.01); C08K 5/5357 (2006.01); C09D 5/32 (2006.01); C09D 183/06 (2006.01)
CPC C09D 5/32 (2013.01) [C08G 77/08 (2013.01); C08G 77/18 (2013.01); C08K 5/5357 (2013.01); C09D 183/06 (2013.01); G02B 5/22 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A liquid composition, comprising:
a light absorber including a phosphonic acid and copper ion, the phosphonic acid having an aryl group bonded to a phosphorus atom;
at least one selected from the group consisting of an alkoxysilane and a hydrolysate of an alkoxysilane;
a phosphoric acid ester; and
a solvent including a first organic solvent, wherein
a content of the first organic solvent having a relative permittivity of 7 or less at 20° C. is 20 mass % or less.