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A kind of photochromic lens and its production process

A color-changing lens and production process technology, applied in the field of optical films, can solve problems such as photochromic dye damage, achieve good light transmittance, improve hardness and solvent resistance, and improve product qualification rates.

Active Publication Date: 2022-06-21
P&E TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a production process for photochromic lenses. This technology can be widely used in the field of lens coating technology. The use of intelligent manipulators with EB curing technology can effectively solve the problem of photochromic dyes that are only cured by ultraviolet light. Injury problems, improve production efficiency and product qualification rate

Method used

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  • A kind of photochromic lens and its production process
  • A kind of photochromic lens and its production process
  • A kind of photochromic lens and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Prepare the first layer of photochromic composition:

[0059]In the reactor, drop into 3.5g midnight gray (photochromic powder), 3.5g misty gray (photochromic powder), 0.2g BASF Tinuvin292 (light stabilizer), 0.2g Tinuvin 329 (ultraviolet light absorber), 0.2g BHT (antioxidant), 0.1g BYK333 (leveling agent), 0.1g BYK1790 (defoamer) and 50g dimethyl carbonate (organic solvent), heat up to 80-95°C, keep stirring for 1-2 hours, Put in 15g GU3010Z (polyurethane acrylate), 20g GU2168Z (polyester acrylate), 10g GU2271B (pure acrylate), 0.05g MEHQ (polymerization inhibitor), and keep stirring at 55-70°C for 20-50 minutes to obtain photoinduced Color changing composition.

Embodiment 2

[0061] Prepare the second protective layer composition:

[0062] Drop into 1g sodium acrylate (anti-fog additive), 2g photoinitiator 184, 2g photoinitiator TPO, 0.2g BASF Tinuvin292, 0.2g Tinuvin 329 (ultraviolet absorber), 0.2g BHT (antioxidant) in the reactor ), 0.1g BYK333 (leveling agent), 0.1g BYK1790 (defoamer) and 50g ethanol (organic solvent), heat up to 50-70°C, keep stirring for 20-50 minutes, then put in 15g GU3010Z (polyurethane acrylate) , 20g GU9315Z (polyester acrylate), 10g GU2271B (pure acrylate), 0.05g MEHQ (polymerization inhibitor), after stirring at 55-70°C for 20-50 minutes, the protective layer composition was obtained.

Embodiment 3

[0064] The lens substrate is sucked by the intelligent manipulator, and the lens is placed in a fixed position facing down. The photochromic liquid is sprayed onto the surface of the lens from bottom to top by spraying. After 5 seconds, the intelligent manipulator raises its height and starts to rotate at 1500rpm. After counting and rotating for 20 seconds, it stops, and then the intelligent manipulator puts the side of the lens coated with the color-changing liquid upward on the track, bakes it with a 200W infrared lamp for about 2 minutes, and then passes it through EB Electronics under the protection of nitrogen. Beam curing to form a film, the distance between the electron beam emission window and the lens is set to 5cm, the voltage of the EB electron beam is set to 70kv, the dose is set to 50KGy, and the oxygen content detection value is below 200PPM. The intelligent manipulator absorbs it, puts the side of the lens coated with the color-changing liquid down and places it ...

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Abstract

The invention provides a production process of a color-changing lens, which belongs to the field of optical films. The photochromic lens includes a lens substrate, a first layer of photochromic composition coating and a second layer of protective layer composition coating. First, the photochromic composition is sprayed on the lens substrate, irradiated by infrared lamps, and then passed through EB. Radiation curing forms a thin film, that is, the first layer of photochromic composition coating; then sprays the protective layer composition on the lens containing the first layer of photochromic composition coating, irradiates with infrared lamps, and then undergoes UV curing to form The thin film, ie the second coating of the protective layer composition, ultimately results in a photochromic lens comprising the first coating of the photochromic composition and the second coating of the protective layer composition. The combination of EB electron beam and UV technology shortens the curing time of the color-changing layer and the protective layer to a few seconds, and the cured protective layer can achieve anti-fog performance. The color-changing lenses prepared by this technology have good light transmittance and firmness. degree and depth of discoloration.

Description

technical field [0001] The invention belongs to the field of optical films, and in particular relates to a color-changing lens and a production process thereof. Background technique [0002] At present, there are two types of color-changing glasses on the market. One is the color-changing of the base material, which is to dissolve the photochromic powder in the resin or monomer, and then pour it into the mold and cure it at high temperature. This process has the following defects: 1) when the color changes, the depth of the color change is different, and the vision of panda eyes is easy to appear, which brings extremely bad visual experience to customers; 3) Due to the limitation of raw materials, this process can only produce 1.56 and 1.61 lenses, and cannot produce 1.67 or 1.71 high value-added lenses. [0003] Coating discoloration technology is a process of coating a layer of discoloration coating on the surface of the lens and curing it to form a film under certain con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D167/06C09D175/14C09D7/63C08J7/046G02C7/10G02B1/10C08L69/00C08L75/04C08L33/04
CPCC09D167/06C09D7/63C08J7/042C08J7/046G02C7/102G02B1/10C08J2369/00C08J2375/04C08J2333/04C08L75/14C08K5/0041C08K5/42C08K5/098
Inventor 申立全岳绍杰周娜
Owner P&E TECH CO LTD
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