Optical material and use thereof

Patent metadata

Field	Value
Publication number	US-10627650-B2
Application number	US-201414917317-A
Country	US
Kind code	B2
Filing date	Sep 10, 2014
Priority date	Sep 10, 2013
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

An optical material of the present invention has a minimum transmittance value in a wavelength range of 445 nm to 470 nm of a transmittance curve measured at a thickness of 2 mm of the optical material.

First claim

The invention claimed is:

1. An optical material in which a transmittance curve measured at a thickness of 2 mm thereof satisfies the following characteristics (1) to (4),
wherein (1) the transmittance curve has a local maximum transmittance value in a wavelength range of 400 nm to 440 nm and the maximum transmittance thereof is 50% or more,
wherein (2) the transmittance curve has a minimum transmittance value in a wavelength range of 445 nm to 470 nm,
wherein (3) the transmittance at a wavelength of 500 nm is 70% or more, and
wherein (4) the minimum transmittance value in the wavelength range of 445 nm to 470 nm is four-fifths or less of the transmittance at a wavelength of 500 nm,

wherein the optical material comprises a polythiourethane and organic dyes,
wherein the organic dyes are comprised of at least two selected from porphyrin-based compounds represented by the General Formula (A):

wherein all of X 1 to X 8 represent bromine atoms; R 1 to R 4 each independently represents a hydrogen atom, and a straight 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, and
wherein the amount of the organic dyes is 5 ppm to 100 ppm.

2. The optical material according to claim 1 , comprising:
at least one kind of organic dyes which have an absorption peak in a wavelength range of 445 nm to 470 nm, in an absorption spectrum which is measured at an optical path length of 10 mm of a chloroform solution thereof at a concentration of 0.01 g/L, and the half-value width of the absorption peak is 10 nm or more and less than 50 nm.

3. The optical material according to claim 1 , comprising:
organic dyes which have an absorption peak in a wavelength range of 445 nm to 455 nm and organic dyes which have an absorption peak in a wavelength range of 460 nm to 470 nm, in an absorption spectrum which is measured at an optical path length of 10 mm of a chloroform solution thereof at a concentration of 0.01 g/L.

4. The optical material according to claim 1 , the optical material has a minimum transmittance value in a wavelength range of 455 nm to 465 nm.

5. The optical material according to claim 1 ,
wherein the organic dyes have an absorption peak in a wavelength range of 445 nm to 470 nm, in an absorption spectrum which is measured at an optical path length of 10 mm of a chloroform solution thereof at a concentration of 0.01 g/L.

6. A plastic spectacle lens comprised of the optical material according to claim 1 .

7. A plastic spectacle lens, comprising:
a lens base material comprised of the optical material according to claim 1 .

Assignees

• Mitsui Chemicals Inc
• Yamamoto Chemicals Inc

Inventors

• Kakinuma Naoyuki
• Hashimoto Toshiya
• Kinoshita Satoshi
• Sasaki Hiroyuki

Classifications

• B01J2531/025

  Ligands with a porphyrin ring system or analogues thereof, e.g. phthalocyanines, corroles · CPC title

• C08K5/0041

  Optical brightening agents, organic pigments · CPC title

• G02F2202/04

  dye · CPC title

• G02C2202/16

  Laminated or compound lenses · CPC title

• C08L101/00

  Compositions of unspecified macromolecular compounds · CPC title