Coating composition for optical article, spectacle lens, spectacles, and method for producing spectacle lens, and optical article and method for producing optical article

Patent metadata

Field	Value
Publication number	US-12319839-B2
Application number	US-202017442809-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Mar 29, 2019
Publication date	Jun 3, 2025
Grant date	Jun 3, 2025

Abstract

A coating composition for an optical article containing a photochromic compound and two or more (meth)acrylates, the two or more (meth)acrylates containing a non-cyclic difunctional methacrylate having a molecular weight of 500 or more and a non-cyclic tri- or higher functional (meth)acrylate.

First claim

The invention claimed is:

1. A spectacle lens comprising:
a lens substrate; and
a photochromic layer formed by curing a coating composition for an optical article, wherein:
the coating composition for the optical article comprises:
a photochromic compound; and
(meth)acrylates, wherein the (meth)acrylates consist of the following components (a), (b) and (c):
(a) polyethylene glycol dimethacrylate having a molecular weight of 600 or more,
(b) trimethylolpropane tri(meth)acrylate, and
(c) neopentyl glycol di(meth)acrylate,

the coating composition contains the component (a) in an amount of 60 mass % or more relative to a total amount of the (meth)acrylates, and
the coating composition contains the component (b) in an amount of 20 mass % or less relative to a total amount of the (meth)acrylates.

2. Spectacles comprising the spectacle lens according to claim 1 .

3. An optical article comprising:
a substrate; and
a photochromic layer formed by curing a coating composition, wherein:
the coating composition comprises:
a photochromic compound; and
(meth)acrylates, wherein the (meth)acrylates consist of the following components (a), (b) and (c):
(a) polyethylene glycol dimethacrylate having a molecular weight of 600 or more,
(b) trimethylolpropane tri(meth)acrylate, and
(c) neopentyl glycol di(meth)acrylate,

the coating composition contains the component (a) in an amount of 60 mass % or more relative to a total amount of the (meth)acrylates, and
the coating composition contains the component (b) in an amount of 20 mass % or less relative to a total amount of the (meth)acrylates.

4. The optical article according to claim 3 , wherein the optical article is a goggle lens.

5. The optical article according to claim 3 , wherein the optical article is a visor portion of a sun visor.

6. The optical article according to claim 3 , wherein the optical article is a shield member of a helmet.

7. A method for producing an optical article, comprising:
applying a coating composition onto a substrate; and
subjecting the applied coating composition to a curing treatment to form a photochromic layer, wherein:
the coating composition comprises:
a photochromic compound; and
(meth)acrylates, wherein the (meth)acrylates consist of the following components (a), (b) and (c):
(a) polyethylene glycol dimethacrylate having a molecular weight of 600 or more,
(b) trimethylolpropane tri(meth)acrylate, and
(c) neopentyl glycol di(meth)acrylate,

the coating composition contains the component (a) in an amount of 60 mass % or more relative to a total amount of the (meth)acrylates, and
the coating composition contains the component (b) in an amount of 20 mass % or less relative to a total amount of the (meth)acrylates.

8. The method for producing an optical article according to claim 7 , wherein the optical article is a spectacle lens.

9. The method for producing an optical article according to claim 7 , wherein the optical article is a goggle lens.

10. The method for producing an optical article according to claim 7 , wherein the optical article is a visor portion of a sun visor.

11. The method for producing an optical article according to claim 7 , wherein the optical article is a shield member of a helmet.

Assignees

• Hoya Lens Thailand Ltd

Inventors

• Shimada Takuya
• Yamashita Teruo

Classifications

• G02C7/102

  Photochromic filters · CPC title

• G02B1/111

  using layers comprising organic materials · CPC title

• C09D135/02

  Homopolymers or copolymers of esters (C09D135/06, C09D135/08 take precedence) · CPC title

• C09D4/00

  Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond {; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16} · CPC title

• C08F2800/20

  as weight or mass percentages · CPC title