Optical material, polymerizable composition for optical material, cured product, optical material, plastic lens, method of producing optical material, and method of using optical material

Patent metadata

Field	Value
Publication number	US-12135472-B2
Application number	US-202017604639-A
Country	US
Kind code	B2
Filing date	Apr 17, 2020
Priority date	Apr 19, 2019
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

In an optical material, a transmittance curve satisfies the following characteristics (1) and (2) and a hue in the CIE 1976 (L*, a*, b*) color space satisfies the following characteristic (3),(1) the transmittance curve has a maximum value of a transmittance at a wavelength of from 400 nm to 450 nm or from 520 nm to 570 nm, and a largest value of the transmittance at the wavelength of from 400 nm to 450 nm and a transmittance at from 520 nm to 570 nm are 50% or more,(2) the transmittance curve has a minimum value of a transmittance at a wavelength of from 470 nm to 500 nm, and the minimum value is 40% or less, and(3) in the hue in the CIE 1976 (L*, a*, b*) color space, a* is from 2.5 to 5.5 and b* is from 5 to 25.

First claim

The invention claimed is:

1. An optical material in which a transmittance curve satisfies the following characteristics (1) and (2) and a hue in a CIE 1976 (L*, a*, b*) color space satisfies the following characteristic (3), the transmittance curve and the hue being measured at a thickness of 2 mm:
(1) the transmittance curve has a maximum value of transmittance at a wavelength of from 400 nm to 450 nm or from 520 nm to 570 nm, and a largest value of transmittance at the wavelength of from 400 nm to 450 nm, and transmittance at from 520 nm to 570 nm, are 50% or more,
(2) the transmittance curve has a minimum value of transmittance at a wavelength of from 470 nm to 500 nm, and the minimum value is 40% or less, and
(3) in the hue in the CIE 1976 (L*, a*, b*) color space, a* is from 3.0 to 4.5 and b* is from 15 to 22,
wherein a color tone adjusting agent is further contained in an amount of from 3 ppm to 20 ppm, and the color tone adjusting agent comprises an anthraquinone-based dye.

2. The optical material according to claim 1 , wherein a yellow index (YI) is from 25 to 45.

3. The optical material according to claim 1 , wherein an organic dye containing at least one selected from porphyrin-based compounds represented by the following Formula (1) is contained in an amount of from 5 ppm to 50 ppm,

wherein, in Formula (1), each of X 1 to X 8 independently represents a hydrogen atom, a linear or branched alkyl group, an ethynyl group, an ethynyl group substituted with a linear or branched alkyl group, an ethynyl group having a phenyl group, or an ethynyl group having a phenyl group substituted with a linear or branched alkyl group, not all of X 1 to X 8 are hydrogen atoms, each of R 1 to R 4 independently represents a hydrogen atom or a linear or branched alkyl group, and M represents two hydrogen atoms, a divalent metal atom, a trivalent substituted metal atom, a tetravalent substituted metal atom, a hydroxylated metal atom, or an oxidized metal atom.

4. The optical material according to claim 3 , wherein the organic dye contains at least one selected from porphyrin-based compounds represented by the following Formula (1-1) and the following Formula (1-2):

5. The optical material according to claim 1 , wherein at least one selected from poly(thio)urethane or poly(thio)urethane urea is contained.

6. The optical material according to claim 1 , wherein the optical material is used as a lens for reducing migraines.

7. A method of using the optical material according to claim 1 as a lens for reducing migraines.

Assignees

• Mitsui Chemicals Inc
• Itoh Optical Ind

Inventors

• Matsui Yusuke
• Suesugi Kouji
• Ito Shinsuke
• Oda Hirofumi

Classifications

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• C08K5/0091

  Complexes with metal-heteroatom-bonds · CPC title

• C08K5/0041

  Optical brightening agents, organic pigments · CPC title

• C08G18/758

  containing two or more cycloaliphatic rings · CPC title

• C08G18/3876

  containing mercapto groups · CPC title