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Photochromic spectacle lens with coating prepared from epoxy resin

A technology for preparing and hydrogenating epoxy resin, which is applied in the field of photochromic eyeglass lenses

Active Publication Date: 2020-10-27
浙江伟星光学股份有限公司
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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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  • Photochromic spectacle lens with coating prepared from epoxy resin
  • Photochromic spectacle lens with coating prepared from epoxy resin
  • Photochromic spectacle lens with coating prepared from epoxy resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 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 the substrate 4, and the upper surface of the color-changing coating is provided with a protective layer 2 and an upper surface Hard layer 1 is provided, and a lower hard layer 5 is provided on the lower surface of the substrate.

[0034] The material and formula of the color changing coating are as follows:

[0035]

[0036]

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

Embodiment 2

[0043] 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 the substrate 4, and the upper surface of the color-changing coating is provided with a protective layer 2 and an upper surface Hard layer 1 is provided, and a lower hard layer 5 is provided on the lower surface of the substrate.

[0044] The material and formula of the color changing coating are as follows:

[0045]

[0046] The mixed liquid was prepared by a similar process in Example 1, and sampled and tested. The viscosity of the mixed liquid was 32.5 cps@25°C.

[0047] The color-changing spectacle lens containing the epoxy resin preparation coating is prepared by a process similar to Example 1. Through Filmetrics' F10-AR optical thickness tester, the thickness of the photochromic coating is 20.2 microns, and the thickness of the hardened layer is 3...

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Abstract

The invention relates to a photochromic spectacle lens with a coating prepared from epoxy resin. The photochromic coating is formed by curing a composition consisting of hydrogenated epoxy resin, flexible epoxy resin, a cationic thermal curing agent, photochromic dye, an auxiliary agent and a solvent. The cationic thermal curing agent is applied, so that the coating curing temperature is reduced,the reaction temperature can be reduced to 80 DEG C or below, and the lens is not yellowed; the curing time of the coating is shortened, the reaction is rapid, and the epoxy resin can be completely cured within 0.5 hour; the curing agent does not react with the photochromic dye, so that abnormal color of the spectacle lens is avoided. The coating liquid prepared from the epoxy resin has good storage stability. The molecular structure of the hydrogenated epoxy resin adopted by the invention does not contain benzene rings, so that the fracture defect of double bonds is overcome, the outdoor weather resistance is greatly improved, and the yellowing resistance is very good; and the flexible epoxy resin is added to adjust the hardness of the coating, thereby adapting to the flexibility and hardness requirements of the spectacle lens coating and ensuring the high color change speed of the spectacle lens.

Description

Technical field [0001] The invention relates to the technical field of spectacle lenses, in particular to a color-changing spectacle lens coated with epoxy resin. Background technique [0002] The color of the photochromic lens becomes darker when exposed to sunlight, which can reduce the light transmittance and protect the eyes; in a room with soft light, the color of the photochromic lens can fade and become normal The lens is transparent and colorless. The photochromic lens can not only darken and brighten with the intensity of the light, but also absorb ultraviolet rays that are harmful to human eyes, which can reduce the damage caused by ultraviolet rays. The matrix color-changing photochromic lens is by adding photochromic dye to the lens resin. After the lens resin is cured, the color-changing dye is uniformly dispersed in the lens. Because the thickness of the diopter spectacle lens is different in different positions, the color depth of the lens in different positions ...

Claims

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Application Information

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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 浙江伟星光学股份有限公司
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