US 12,135,472 B2
Optical material, polymerizable composition for optical material, cured product, optical material, plastic lens, method of producing optical material, and method of using optical material
Yusuke Matsui, Omuta (JP); Kouji Suesugi, Arao (JP); Shinsuke Ito, Omuta (JP); and Hirofumi Oda, Gamagori (JP)
Assigned to MITSUI CHEMICALS, INC., Tokyo (JP); and ITOH OPTICAL INDUSTRIAL CO., LTD., Gamagori (JP)
Appl. No. 17/604,639
Filed by MITSUI CHEMICALS, INC., Tokyo (JP); and ITOH OPTICAL INDUSTRIAL CO., LTD., Gamagori (JP)
PCT Filed Apr. 17, 2020, PCT No. PCT/JP2020/016889
§ 371(c)(1), (2) Date Oct. 18, 2021,
PCT Pub. No. WO2020/213716, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 2019-079855 (JP), filed on Apr. 19, 2019.
Prior Publication US 2022/0197063 A1, Jun. 23, 2022
Int. Cl. G02C 7/10 (2006.01); C08G 18/38 (2006.01); C08G 18/75 (2006.01); C08K 5/00 (2006.01); G02B 5/22 (2006.01)
CPC G02C 7/104 (2013.01) [C08G 18/3876 (2013.01); C08G 18/758 (2013.01); C08K 5/0041 (2013.01); C08K 5/0091 (2013.01); G02B 5/22 (2013.01)] 7 Claims
OG exemplary drawing
 
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.