Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An ophthalmic lens comprising a photochromic coating cured by visible light

A technology for visible light and spectacle lenses, applied in the field of spectacle lenses, to achieve the effects of reducing equipment and site investment, improving production pass rate, and shortening curing time

Active Publication Date: 2021-08-10
WEIXING OPTICAL CO LTD
View PDF6 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An ophthalmic lens comprising a photochromic coating cured by visible light
  • An ophthalmic lens comprising a photochromic coating cured by visible light
  • An ophthalmic lens comprising a photochromic coating cured by visible light

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%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a spectacle lens comprising a color-changing coating cured by visible light. An antifouling layer (1), an antireflection layer (2), a hardening layer (3), a protective layer (4), and a visible light coating are respectively arranged from top to bottom. Curing the color-changing coating (5), the substrate (6), the hardening layer (7), the antireflection layer (8), and the antifouling layer (9). Visible light-curable color-changing coating (5) consists of 75.0-85.0 parts of acrylate oligomer, 10.0-15.0 parts of reactive diluent, 4.5-6.0 parts of visible light photoinitiator, 2.5-5.0 parts of photochromic dye, and 2.5-6.3 parts of additives Parts, composed of 18.0 to 34.0 parts of solvent. The visible light photoinitiator is one or more of double 2,6-difluoro-3-pyrrole phenyl titanocene (784), camphorquinone, and the excitation light source of the photoinitiator is visible light, Ar laser (488nm), A type of FD‑Nd / YAG‑laser (532nm) with an energy density greater than 2000mJ / cm 2 . The curing reaction of the photochromic coating provided by the present invention is rapid, and the curing time is very short, which is conducive to improving the production qualification rate of spectacle lenses; during the curing process of the color-changing coating, the color-changing dye does not react with the photoinitiator, and the color of the coating does not appear 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com