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Spectacle lens comprising visible light cured color-changing coating layer

A technology for visible light and spectacle lenses, applied in the field of spectacle lenses, to achieve the effects of improving the production pass rate, ensuring the depth of discoloration, and responding quickly

Active Publication Date: 2021-01-19
WEIXING OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the present invention, visible light is used as the excitation light source of the photoinitiator, and a photoinitiator decomposed by visible light is used as a complete set. The color-changing coating will not have color abnormalities, which solves the core problem of simultaneous excitation of color-changing dyes and photoinitiators

Method used

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  • Spectacle lens comprising visible light cured color-changing coating layer
  • Spectacle lens comprising visible light cured color-changing coating layer
  • Spectacle lens comprising visible light cured color-changing coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The materials and formulations of the photochromic coating are as follows:

[0022]

[0023] Accurately weigh CN9013NS, DTMPTA, Silok 8244, DMF and 50% xylene in the formula, add it into the batching tank at room temperature, stir until all materials are completely mixed evenly, and continue stirring for 1 hour. Take another small pot, add the weighed color-changing dye Reversacol velvet blue, visible light photoinitiator 784, and then add the remaining 50% of the formula amount of xylene, stir at room temperature for 0.5 hours, and observe whether the materials are completely dissolved. After the dissolution is complete, all the solution in the small tank is added into the batching tank, and stirred for 0.5 hours to make it evenly mixed. Filter the mixed solution with filter paper with 5 micron filter holes, and take a sample for testing. The viscosity of the mixed solution is 82.3cps@25°C.

[0024] After the preparation of the above mixed solution is completed, it...

Embodiment 2

[0027] The materials and formulations of the photochromic coating are as follows:

[0028]

[0029] The mixed solution was prepared by a process similar to that of Example 1, and a sample was taken for testing. The viscosity of the mixed solution was 98.7cps@25°C.

[0030] The ophthalmic lens containing the photochromic coating cured by visible light was prepared by a process similar to that of Example 1.

[0031] The obtained spectacle lens has a reversible photochromic function, and the color becomes darker under sunlight and can fade indoors. The resulting spectacle lens was irradiated with an ultraviolet lamp for 3 minutes, and immediately tested with a Japan Shimadzu U-2600 spectrophotometer, the visible light transmittance of the spectacle lens was 21.7%, and the visible light transmittance of the spectacle lens after 10 minutes was 86.1%.

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Abstract

The invention relates to a spectacle lens comprising a visible light cured color-changing coating layer. The spectacle lens is provided with an antifouling layer (1), an antireflection layer (2), a hardened layer (3), a protective layer (4), the visible light cured color-changing coating layer (5), a substrate (6), a hardened layer (7), an antireflection layer (8) and an antifouling layer (9) fromtop to bottom. The visible light cured color-changing coating layer (5) is composed of 75.0 to 85.0 parts of an acrylate oligomer, 10.0 to 15.0 parts of a reactive diluent, 4.5 to 6.0 parts of a visible light photoinitiator, 2.5 to 5.0 parts of a photochromic dye, 2.5 to 6.3 parts of an auxiliary agent and 18.0 to 34.0 parts of a solvent. The visible light photoinitiator is one or more of bis-2,6-difluoro-3-titanium pyrrophenylferrocene (784) and camphorquinone, an excitation light source of the photoinitiator is one of visible light, Ar-laser (488 nm) and FD-Nd / YAG-laser (532 nm), and the energy density of the photoinitiator is greater than 2000 mJ / cm<2>. The photochromic coating layer provided by the invention is rapid in curing reaction and short in curing time, and is beneficial to improving the production qualification rate of the spectacle lens; in the curing process of the color-changing coating layer, a color-changing dye does not react with the photoinitiator, and the color of the coating layer is not abnormal.

Description

technical field [0001] The invention belongs to the technical field of photochromic coatings, in particular to an eyeglass lens with visible light-cured photochromic coatings. Background technique [0002] Photochromic lenses become darker when exposed to sunlight, which can reduce light transmittance and protect the eyes; in a room with soft light, the color of photochromic lenses can fade and become ordinary Like a lens, transparent and colorless. Photochromic lenses can not only darken and brighten with the intensity of light, but also absorb ultraviolet rays that are harmful to human eyes, reducing the damage caused by ultraviolet rays. There is a spectacle lens with coating discoloration (or film discoloration) on the market. The photochromic dyes are all concentrated in one coating and evenly coated on the surface of the spectacle lens. The depth of discoloration at different positions of the lens is the same, and the discoloration speed of the lens faster. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/41C08J7/04C08J7/046G02C7/10
CPCC08J7/04C08J7/042C08J2475/14C09D175/14C09D7/41C08J7/046G02C7/102
Inventor 方永增张哲安程龙单李玺杨燕霞刘传冬
Owner WEIXING OPTICAL CO LTD
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