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A kind of photochromic spectacle lens prepared by epoxy resin coating

An epoxy resin preparation and epoxy resin technology, applied in the field of color-changing spectacle lenses, to achieve the effects of excellent adhesion, good storage stability, and no increase in liquid viscosity

Active Publication Date: 2022-02-11
WEIXING OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is not possible to simply add color-changing dyes to ordinary epoxy resins and use them as color-changing coated spectacle lenses

Method used

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  • A kind of photochromic spectacle lens prepared by epoxy resin coating
  • A kind of photochromic spectacle lens prepared by epoxy resin coating
  • A kind of photochromic spectacle lens prepared by epoxy resin coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Please see attached figure 1 , a color-changing spectacle lens coated with epoxy resin, comprising a color-changing coating, characterized in that the lower surface of the color-changing coating 3 is attached to the upper surface of a substrate 4, and the upper surface of the color-changing coating is provided with a protective layer 2 and an upper surface The hardened layer 1 is provided with a lower hardened layer 5 on the lower surface of the substrate.

[0034] The materials and formulations of the color-changing coating are as follows:

[0035]

[0036]

[0037] Accurately weigh EP-4080E, polypropylene glycol diglycidyl ether, n-butanol and 50% xylene in the formula, add to the batching tank at room temperature, slowly add BYK-333 under stirring, stir until all materials are completely dissolved, continue Stir for 1 hour. Take another small pot, add the weighed photochromic dye, cationic thermosetting agent, and then add the remaining 50% xylene of the form...

Embodiment 2

[0043] Please see attached figure 1 , a color-changing spectacle lens coated with epoxy resin, comprising a color-changing coating, characterized in that the lower surface of the color-changing coating 3 is attached to the upper surface of a substrate 4, and the upper surface of the color-changing coating is provided with a protective layer 2 and an upper surface The hardened layer 1 is provided with a lower hardened layer 5 on the lower surface of the substrate.

[0044] The materials and formulations of the color-changing coating are as follows:

[0045]

[0046] The mixed solution was prepared by a process similar to that of Example 1, and the sample was tested. The viscosity of the mixed solution was 32.5cps@25°C.

[0047] The photochromic ophthalmic lens containing the coating prepared by epoxy resin was prepared by a process similar to that of Example 1. Through the F10-AR optical thickness tester of Filmetrics, the thickness of the photochromic coating is 20.2 micr...

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Abstract

The invention relates to a photochromic spectacle lens coated with epoxy resin, the photochromic coating is composed of hydrogenated epoxy resin, flexible epoxy resin, cationic thermal curing agent, photochromic dye, auxiliary agent and solvent The composition is solidified. The invention uses a cationic thermal curing agent, which reduces the curing temperature of the coating, and the reaction temperature can be reduced to 80°C or below, and the lens will not turn yellow; the curing time of the coating is shortened, the reaction is rapid, and the epoxy resin can be completely cured within 0.5 hours. Curing; the curing agent does not react with the color-changing dye and will not cause abnormal color of the eyeglass lens. The coating solution prepared by epoxy resin has good storage stability. The molecular structure of the hydrogenated epoxy resin used in the present invention does not contain benzene rings, overcomes the defect of double bond fracture, the outdoor weather resistance will be greatly increased, and the yellowing resistance is very good; the softness and hardness of the coating can be adjusted by adding flexible epoxy resin , adapt to the flexibility and hardness requirements of the coating of the spectacle lens, and ensure that the discoloration of the spectacle lens is relatively fast.

Description

technical field [0001] The invention relates to the technical field of spectacle lenses, in particular to a photochromic spectacle lens coated with epoxy resin. 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. Matrix color-changing photochromic lenses are made by adding photochromic dyes to the lens resin. After the lens resin is cured, the color-changing dyes are evenly dispersed in the lenses. Because the thickness of different positions of the spectacle lens with diopter is not the same, the color depth of different positions of the lens after the color-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02C7/10G02B1/04G02B1/14C09D163/00C09D5/29C08G59/40
CPCG02C7/102G02B1/041G02B1/14C09D163/00C09D5/29C08G59/40C08L2205/025C08L63/00
Inventor 方永增李品秧张哲安程龙杨燕霞单李玺
Owner WEIXING OPTICAL CO LTD