Manufacturing method of anti-impact fog vision double-effect prevention and control lens

Abstract

The invention discloses a manufacturing method of an anti-impact fog vision double-effect prevention and control lens, which comprises the following steps: S1, adding polyvinyl alcohol and vinyltriethoxysilane into deionized water, adding ion exchange resin at the same time, heating to 80 DEG C, continuously stirring and reacting for 6-8 hours, and stopping heating to obtain silane modified polyvinyl alcohol; s2, adding silane modified polyvinyl alcohol, N-hydroxyl acrylamide, methyl methacrylate and butyl acrylate into deionized water, adding an initiator solution, heating to 60 DEG C, and continuously reacting for 6-8 hours to obtain a silane modified polymer; and S3, coating a prevention and control lens base material with the silane modified polymer prepared in S2, and drying in a constant-temperature drying box at 100-110 DEG C for 2-3 hours to obtain the surface-cured prevention and control lens. The prevention and control lens has excellent impact resistance and anti-fog performance.

Description

Technical Field

[0001] This invention relates to the field of anti-fogging lens technology, specifically to a method for manufacturing an anti-impact fogging dual-effect anti-fogging lens. Background Technology

[0002] For children and adolescents, whose eyes are still developing, wearing regular nearsighted glasses allows them to see clearly in the center, but the images of objects seen in their peripheral vision fall behind the retina, creating hyperopic defocus. This causes the axial length of the eye to stretch, actually worsening myopia. Therefore, regular nearsighted glasses are only designed to make people see clearly; their optical design does not effectively control the progression of myopia. Anti-defocus lenses can convert hyperopic defocus in the peripheral retina into myopic defocus, thereby inhibiting axial length growth and controlling the progression of myopia.

[0003] Existing safety glasses still have room for improvement in terms of impact resistance and fog-proofing capabilities. Anti-fog performance relies on the properties of the lens surface, currently employing two main methods: one is to make the surface hydrophobic, preventing fog droplets from condensing; the other is to make the surface hydrophilic, causing condensed droplets to quickly flatten out, thus reducing light scattering. This invention provides a modified hydrophilic anti-fog coating applied to safety lenses, which enhances both anti-fog effectiveness and impact resistance. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a method for manufacturing an impact-resistant dual-effect fogging control lens. Technical solution

[0005] A method for manufacturing an impact-resistant dual-effect fogging control lens includes the following steps: S1: Polyvinyl alcohol and vinyltriethoxysilane are added to deionized water, and ion exchange resin is added at the same time. The temperature is raised to 80°C, and the reaction is stirred continuously for 6-8 hours before heating is stopped to obtain silane-modified polyvinyl alcohol. S2: Add silane-modified polyvinyl alcohol, N-hydroxyacrylamide, methyl methacrylate, and butyl acrylate to deionized water, add initiator solution, heat to 60℃, and continue the reaction for 6-8 hours to obtain silane-modified polymer. S3: The silane-modified polymer prepared in S2 is coated onto the substrate of the control lens and dried in a constant temperature drying oven at 100-110℃ for 2-3 hours to obtain a surface-cured control lens.

[0006] Furthermore, the mass ratio of polyvinyl alcohol to vinyltriethoxysilane in S1 is 4:1-8:1, preferably 6:1.

[0007] Furthermore, the mass of deionized water in S1 is 1-2 times the total mass of polyvinyl alcohol and vinyltriethoxysilane.

[0008] Furthermore, the mass ratio of silane-modified polyvinyl alcohol, N-hydroxyacrylamide, methyl methacrylate, and butyl acrylate in S2 is 10-20:10-20:5-10:1-3. Preferably, it is 15:20:8:2.

[0009] Furthermore, the mass of deionized water in S2 is 1-2 times the total mass of silane-modified polyvinyl alcohol, N-hydroxyacrylamide, methyl methacrylate, and butyl acrylate.

[0010] Furthermore, the initiator is ammonium persulfate, and the amount added is 0.5-0.6% of the total mass of silane-modified polyvinyl alcohol, N-hydroxyacrylamide, methyl methacrylate, and butyl acrylate.

[0011] Beneficial effects:

[0012] This invention introduces the silane coupling agent vinyltriethoxysilane into a polymer coating. This silane can undergo condensation crosslinking with the hydroxyl groups on polyvinyl alcohol (PVA), restricting the molecular movement of the PVA molecular chains and significantly improving the impact resistance of the lens. The introduced PVA molecules contain multiple hydrophilic hydroxyl groups, which, when copolymerized with other functional monomers, significantly enhance water resistance and other physical properties such as hardness and toughness. This results in a hydrophilic coating with excellent overall performance, exhibiting a water contact angle of approximately 5° and excellent wetting properties. The hydrophilic coating causes water droplets to accumulate on its surface, forming a transparent water film, reducing light scattering and providing a significant anti-fog effect. Detailed Implementation

[0013] The present invention will now be described in detail. Example 1

[0014] A method for manufacturing an impact-resistant dual-effect fogging control lens includes the following steps: S1: Add 40g of polyvinyl alcohol and 10g of vinyltriethoxysilane to 10mL of deionized water, and add 1g of ion exchange resin at the same time. Heat to 80℃, stir continuously for 6h and then stop heating to obtain silane-modified polyvinyl alcohol. S2: Add 10g of silane-modified polyvinyl alcohol, 15g of N-hydroxyacrylamide, 5g of methyl methacrylate and 1g of butyl acrylate to 50mL of deionized water, add 0.175g of ammonium persulfate aqueous solution, heat to 60℃ and continue to react for 6-8h to obtain silane-modified polymer. S3: The silane-modified polymer prepared in S2 is coated onto the control lens substrate and dried in a constant temperature drying oven at 100°C for 6 hours to obtain a surface-cured control lens. Example 2

[0015] A method for manufacturing an impact-resistant dual-effect fogging control lens includes the following steps: S1: Add 80g of polyvinyl alcohol and 10g of vinyltriethoxysilane to 10mL of deionized water, and add 1.5g of ion exchange resin at the same time. Heat to 80℃, stir continuously for 8h and then stop heating to obtain silane-modified polyvinyl alcohol. S2: Add 20g of silane-modified polyvinyl alcohol, 15g of N-hydroxyacrylamide, 10g of methyl methacrylate and 3g of butyl acrylate to 50mL of deionized water, add 0.288g of ammonium persulfate aqueous solution, heat to 60℃ and continue to react for 7h to obtain silane-modified polymer. S3: The silane-modified polymer prepared in S2 is coated onto the control lens substrate and dried in a constant temperature drying oven at 100°C for 2-3 hours to obtain a surface-cured control lens. Example 3

[0016] A method for manufacturing an impact-resistant dual-effect fogging control lens includes the following steps: S1: Add 60g of polyvinyl alcohol and 10g of vinyltriethoxysilane to 10mL of deionized water, and add 1.2g of ion exchange resin at the same time. Heat to 80℃, stir continuously for 6h and then stop heating to obtain silane-modified polyvinyl alcohol. S2: 15g of silane-modified polyvinyl alcohol, 20g of N-hydroxyacrylamide, 8g of methyl methacrylate and 2g of butyl acrylate were added to 50mL of deionized water. After adding 0.225g of ammonium persulfate aqueous solution, the temperature was raised to 60℃ and the reaction was continued for 7h to obtain the silane-modified polymer. S3: The silane-modified polymer prepared in S2 is coated onto the control lens substrate and dried in a constant temperature drying oven at 100°C for 2-3 hours to obtain a surface-cured control lens.

[0017] Performance testing: Contact angle: Measured using a contact angle meter; Coating hardness: Tested according to GB / T 6739-1996, with a pressing speed of 1cm / s and a scratch length of 1cm; Anti-fogging performance: According to the rapid hot fogging method in GB / T 31726-2015, the sample is exposed to 100 ℃ hot water at a distance of 5 cm for 10 seconds to observe the fogging situation; Anti-fogging time: According to GB / T 31726-2015, the time for the lens to remain clear is tested; Impact resistance test: According to the technical requirements of GB14866-2006 for personal eye protection, the lens was subjected to the impact of a steel ball with a diameter of 22mm and a weight of about 45g falling freely from a height of 1.3m, and the condition of the lens was observed. Light transmittance: Tested using a UV-Vis spectrophotometer, wavelength range 400-800nm.

[0018]

[0019] Although the present invention has been disclosed above with reference to preferred embodiments, these are not intended to limit the invention. Any person skilled in the art can make various changes or modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be defined by the scope of the claims of this application.

Claims

1. A method for manufacturing an anti-impact, anti-fog, dual-purpose control lens, characterized in that, Comprising the following steps: S1: polyvinyl alcohol and vinyl triethoxysilane are added to deionized water, ion exchange resin is added, the temperature is raised to 80℃, stirring is continued for 6-8h, then heating is stopped, and a silane-modified polyvinyl alcohol is obtained; S2: the silane-modified polyvinyl alcohol, N-hydroxy acrylamide, methyl methacrylate, and butyl acrylate are added to deionized water, an initiator solution is added, the temperature is raised to 60℃, and then the reaction is continued for 6-8h to obtain a silane-modified polymer; S3: the silane-modified polymer prepared in S2 is coated onto a control lens substrate, and dried in a constant temperature drying oven at 100-110℃ for 2-3h to obtain a surface-cured control lens.

2. The method of manufacturing an anti-impact, anti-fog dual-purpose control lens according to claim 1, wherein, The mass ratio of polyvinyl alcohol to vinyl triethoxysilane in S1 is 4:1-8:

1.

3. The method of manufacturing an anti-impact, anti-fog dual-purpose control lens according to claim 2, wherein, The mass ratio of polyvinyl alcohol to vinyl triethoxysilane in S1 is 6:

1.

4. The method of manufacturing an anti-impact, anti-fog dual-purpose control lens according to claim 1, wherein, The mass of deionized water in S1 is 1-2 times the total mass of polyvinyl alcohol and vinyl triethoxysilane.

5. The method of manufacturing an anti-impact, anti-fog, bifocal control lens according to claim 1, wherein, The mass ratio of silane-modified polyvinyl alcohol, N-hydroxy acrylamide, methyl methacrylate, and butyl acrylate in S2 is 10-20:10-20:5-10:1-3.

6. The method of manufacturing an anti-impact, anti-fog, bifocal control lens according to claim 5, wherein, The mass ratio of silane-modified polyvinyl alcohol, N-hydroxy acrylamide, methyl methacrylate, and butyl acrylate in S2 is 15:20:8:

2.

7. The method of manufacturing an anti-impact, anti-fog, bifocal control lens according to claim 1, wherein, The mass of deionized water in S2 is 1-2 times the total mass of silane-modified polyvinyl alcohol, N-hydroxy acrylamide, methyl methacrylate, and butyl acrylate.

8. The method of manufacturing an anti-impact, anti-fog, bifocal control lens according to claim 1, wherein, The initiator is ammonium persulfate, and the addition amount is 0.5-0.6% of the total mass of silane-modified polyvinyl alcohol, N-hydroxy acrylamide, methyl methacrylate, and butyl acrylate.

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