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US 12,617,948 B2Granted
Liquid composition for optical filters and optical filter
AssigneeNippon Sheet Glass Co., Ltd.
InventorsYuichiro Kubo, Lei Cai, Hitomi Masuda, Katsuhide Shimmo
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Abstract
The liquid composition for optical filters according to the present invention contains: a light absorber; at least one of an alkoxysilane and a hydrolysate of an alkoxysilane; a phosphoric acid ester; and a solvent. The light absorber is formed by a phosphonic acid having an aryl group bonded to a phosphorus atom and copper ion. In the liquid composition, a content of an organic solvent having a relative permittivity of 7 or less at 20° C. is 50 mass % or less.
Claims18
A composition comprising:
- a light absorber including a phosphonic acid and a copper ion;
- a phosphoric acid ester at least one selected from the group consisting of a first phosphoric acid ester represented by the following formula (c1) and a second phosphoric acid ester represented by the following formula (c2);
- a curable resin;
- and
- a solvent including a first organic solvent that has a relative permittivity of 7 or less at 20° C., and a second organic solvent that has a relative permittivity of more than 7 at 20° C., wherein
- a mass ratio of the first organic solvent to the composition is 20% or less
- in formulae (cl) and (c2), R21, R22, and R3 are each a monovalent functional group
- represented by -(CH2CH2O)nR4, wherein n is an integer of 1 to 25, R4 is an alkyl group having 6 to 25 carbon atoms, and R21, R22, and R3 may be the same or different functional groups.
5 more elements
Dependencies are inferred from the claim text.