A cof-modified blue dye, a lens coating, a lens, and a preparation method and application thereof

Abstract

The application discloses a COF modified blue dye, a lens coating, a lens and a preparation method and application thereof, and belongs to the technical field of resin lenses. The preparation method of the COF modified blue dye comprises the following steps: step one, preparation of COF powder; and step two, preparation method of the COF modified blue dye: 1 part by weight of the COF powder is dispersed in 5-10 parts by weight of a 5-8 wt% HCl aqueous solution to obtain a COF dispersion liquid; 1-3 parts by weight of a blue dye is dissolved in 10-30 parts by weight of DMSO, and a blue dye dispersion liquid is obtained after uniform mixing; the COF dispersion liquid and the blue dye dispersion liquid are uniformly mixed, and then a polydimethylsiloxane stabilizer is added; and after freeze-drying and crushing, the COF modified blue dye is obtained. The lens coating obtained by the application has the advantages of uniform dispersion of the blue dye, excellent reflection of blue light, clear vision without distortion, no problems of spots and flow marks, high yield and suitability for industrial mass production.

Description

Technical Field

[0001] This invention relates to a COF-modified blue dye, a lens coating, a lens, a preparation method thereof, and its application, particularly to a 1.60 series COF-modified blue dye, a lens coating, a lens, a preparation method thereof, and its application, belonging to the field of resin lens technology. Background Technology

[0002] Blue light refers to high-energy visible light with a wavelength of 380–500 nm. Its short wavelength and high energy allow it to penetrate directly through the cornea and lens to reach the retina, stimulating the retina to produce a large number of free radicals. This damages light-sensitive cells in the retina, and over time, this damage gradually affects vision, leading to decreased vision, blurred vision, and eye strain. Blue light is commonly found in car screens, bathroom heaters, computer and mobile phone LCD screens, LED lights, and movie screens. Especially in car screens, prolonged staring, particularly at night, and frequent checks of navigation screens, constantly irritates the eyes with blue light, exacerbating visual fatigue and significantly increasing the risk of drowsy driving.

[0003] Blocking prolonged exposure to blue light is the most effective way to reduce damage, and using blue light blocking lenses can effectively solve this problem. Currently, there are many types of blue light blocking lens coatings on the market, but existing coatings suffer from problems such as poor stability of anthraquinone dyes (which are prone to degradation with long-term use), poor abrasion resistance (resulting in the loss of blue light blocking effectiveness once the coating wears off), and the loss of blue light blocking efficacy after wear and tear. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a COF-modified blue dye. After the blue dye is modified by a covalent organic framework, the blue dye is evenly dispersed. With the assistance of the stabilizer, the interfacial polymerization ability between the blue dye and the resin is stronger and the stability is better. The anthraquinone dye is not easily degraded and the blue light protection effect is long-lasting.

[0005] Meanwhile, the present invention provides a lens coating in which the blue dye is evenly dispersed, has excellent blue light reflection effect, and provides clear and undistorted vision.

[0006] Meanwhile, this invention provides a method for preparing COF-modified blue dye.

[0007] Meanwhile, the present invention provides a method for preparing a lens coating.

[0008] Meanwhile, this invention provides an application of COF-modified blue dye.

[0009] Meanwhile, the present invention provides an application of a lens coating.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0011] A method for preparing COF powder: 2,4,6-tricarboxymethyl phloroglucinol (TPG) and tris(4-aminophenyl)amine (TAPA) in a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane, and an aqueous solution of acetic acid in a volume ratio of 10:10:(1~2). The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene is 1:(5~15), and the concentration of the aqueous solution of acetic acid is 2~5 mol / L. The resulting mixture is transferred into a Schlenk tube and subjected to at least three freeze-thaw cycles with liquid nitrogen. The Schlenk tube is heated to 120~150℃ and reacted for at least 72 h. After the reaction is completed, the product is washed and vacuum dried to obtain COF powder.

[0012] A method for preparing a COF-modified blue dye: 1 part by weight of COF powder is dispersed in 5-10 parts by weight of 5-8 wt% HCl aqueous solution to protonate the COF and obtain a COF dispersion; 1-3 parts by weight of blue dye is dissolved in 10-30 parts by weight of DMSO, and after mixing evenly, a blue dye dispersion is obtained; the COF dispersion and the blue dye dispersion are mixed evenly at a volume ratio of 1:(2-3), and then 5-10 parts by weight of polydimethylsiloxane stabilizer is added, mixed evenly, freeze-dried, and pulverized to obtain the COF-modified blue dye.

[0013] The blue dye is either Disperse Blue RRL or Vat Blue 6. The chemical name of Disperse Blue RRL is 1-hydroxy-4-[(4-methylphenyl)amino]anthracene-9,10-dione, with the molecular formula C6. 21 H 15 NO3. Vat Blue 6, chemically named 7,16-dichloro-6,15-dihydrobinaphthene[2,3-a:2',3'-h]phenazine-5,9,14,18-tetraone, molecular formula C 28 H 12 Cl2N2O4.

[0014] A method for preparing a lens coating includes the following steps:

[0015] Step 1: Add 50-80 parts by weight of bisphenol A epoxy acrylate, 10-20 parts by weight of polystyrene, 3-5 parts by weight of maleic anhydride, 5-8 parts by weight of polyurethane acrylate, 1-2 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.1-0.3 parts by weight of triethanolamine and 300-800 parts by weight of ethanol to a sealed mixing tank, heat to 50-60°C, set the rotation speed to 3000-5000 rpm, and stir for at least 5 hours to obtain liquid prepolymer resin;

[0016] Step 2: Add 300-500 parts by weight of COF modified blue dye liquid to the liquid prepolymer resin, stir and mix at 1000-3000 rpm at room temperature for at least 2 hours to ensure uniform mixing and no lumps, and obtain the lens coating solution.

[0017] The preparation method of COF modified blue dye liquid is as follows: COF modified blue dye is ultrasonically dissolved in a styrene and DMSO mixed solution with a volume ratio of 1:(2~5). The mass ratio of COF modified blue dye to the mixed solution is 1:(50~80). The ultrasonic temperature is 60~70℃, the ultrasonic power is 100~500W, and the ultrasonic time is at least 10h to obtain COF modified blue dye liquid.

[0018] A method for manufacturing a lens: The above-mentioned lens coating solution is uniformly coated on the surface of the lens substrate by spin coating, spraying or dipping, UV curing and drying to form a transparent anti-blue light film with a thickness of 200~500 nanometers.

[0019] The present invention relates to the application of a COF-modified blue dye in blue light blocking glasses.

[0020] The present invention relates to the application of a lens coating in blue light blocking glasses.

[0021] The present invention relates to the application of a lens in blue light blocking glasses.

[0022] A lens is prepared from a COF-modified blue dye of the present invention.

[0023] A lens is prepared by a lens coating according to the present invention.

[0024] A blue light blocking glasses are prepared using a COF-modified blue dye according to the present invention.

[0025] A type of blue light blocking glasses is prepared by a lens coating according to the present invention.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The COF powder of this invention has excellent wear resistance, high stability and low coefficient of friction. Since the COF material is linked by covalent bonds, when the blue dye of this invention is cross-linked with the COF material through covalent bonds, it can not only significantly improve the dispersibility of anthraquinone dyes, but also improve the stability of anthraquinone dyes. With long-term use, anthraquinone dyes are not easily degraded. At the same time, it significantly improves the wear resistance of the anti-blue light coating and the anti-blue light effect lasts for a long time.

[0028] In the coating of this invention, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide is used as a photoinitiator to act on the unsaturated polyester and acrylate photocuring system of this invention, so as to achieve rapid curing of the material under light conditions; triethanolamine is used as a catalyst to promote the curing reaction and improve adhesion; the addition of maleic anhydride can improve the adhesive strength and adhesion of the liquid prepolymer resin; the components in the coating interact and work synergistically, and the final blue light blocking film has high bonding strength with the lens substrate, strong adhesion, long-lasting blue light blocking effect, and long service life. In addition, the COF modified blue dye is easily dispersed in the liquid prepolymer resin and has high compatibility, avoiding the problems of spots and flow marks. The lens yield is high and it is suitable for large-scale industrial production.

[0029] The coating of this invention serves as a blue light reflector with a blue light transmittance between 20.3% and 30.5%, providing a moderate blue light blocking effect. While offering blue light protection, it also prevents visual distortion. Furthermore, the lens has a light transmittance of ≥95%, ensuring clear vision. Thus, the coating of this invention achieves suitable blue light protection, protecting the eyes while providing clear and realistic vision, and is less likely to cause visual fatigue or other problems. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to specific embodiments. The following embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Example 1

[0031] A method for preparing COF powder: 2,4,6-tricarboxymethyl phloroglucinol (TPG) and tris(4-aminophenyl)amine (TAPA) in a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane, and an aqueous solution of acetic acid in a volume ratio of 10:10:1.5. The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene is 1:10, and the concentration of the aqueous solution of acetic acid is 3 mol / L. The resulting mixture is transferred into a Schlenk tube and subjected to three freeze-thaw cycles with liquid nitrogen. The Schlenk tube is then heated to 130°C and reacted for 72 h. After the reaction is completed, the product is washed and vacuum dried to obtain COF powder.

[0032] A method for preparing a COF-modified blue dye: 1 part by weight of COF powder is dispersed in 8 parts by weight of 6 wt% HCl aqueous solution to protonate the COF and obtain a COF dispersion; 2 parts by weight of blue dye is dissolved in 20 parts by weight of DMSO, and after mixing evenly, a blue dye dispersion is obtained; the COF dispersion and the blue dye dispersion are mixed evenly at a volume ratio of 1:2.5, and then 7 parts by weight of polydimethylsiloxane stabilizer is added, mixed evenly, freeze-dried, and pulverized to obtain the COF-modified blue dye.

[0033] In this embodiment, the blue dye is Disperse Blue RRL, with the chemical name 1-hydroxy-4-[(4-methylphenyl)amino]anthracene-9,10-dione and the molecular formula C. 21 H 15 NO3.

[0034] The COF powder obtained in this embodiment has excellent wear resistance, high stability and low coefficient of friction. Since the COF material is connected by covalent bonds, when the blue dye in this embodiment is cross-linked with the COF material through covalent bonds, it can not only significantly improve the dispersibility of anthraquinone dyes, but also improve the stability of anthraquinone dyes. With long-term use, anthraquinone dyes are not easily degraded. At the same time, it significantly improves the wear resistance of the anti-blue light coating and the anti-blue light effect lasts for a long time.

[0035] A method for preparing a lens coating includes the following steps:

[0036] Step 1: Add 65 parts by weight of bisphenol A epoxy acrylate, 15 parts by weight of polystyrene, 4 parts by weight of maleic anhydride, 6 parts by weight of polyurethane acrylate, 1.5 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.2 parts by weight of triethanolamine and 500 parts by weight of ethanol to a sealed mixing tank, heat to 55°C, set the stirring speed to 4000 rpm, and stir for 6 hours to obtain liquid prepolymer resin.

[0037] Step 2: Add 400 parts by weight of COF modified blue dye liquid to the liquid prepolymer resin, stir and mix at 2000 rpm for 3 hours at room temperature to ensure uniform mixing and no lumps, and obtain the lens coating solution.

[0038] The preparation method of COF modified blue dye liquid is as follows: COF modified blue dye is ultrasonically dissolved in a styrene and DMSO mixed solution with a volume ratio of 1:3. The mass ratio of COF modified blue dye to the mixed solution is 1:70. The ultrasonic temperature is 65℃, the ultrasonic power is 300W, and the ultrasonic time is 12h to obtain COF modified blue dye liquid.

[0039] In this embodiment, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide is used as a photoinitiator to act on the unsaturated polyester and acrylate photocuring system, enabling rapid curing of the material under light conditions. Triethanolamine acts as a catalyst to promote the curing reaction and improve adhesion. The addition of maleic anhydride enhances the bonding strength and adhesion of the liquid prepolymer resin. The components in the coating interact and work synergistically, resulting in a blue light blocking film with high bonding strength and adhesion to the lens substrate, long-lasting blue light blocking effect, and long service life. Furthermore, the COF-modified blue dye is easily dispersed in the liquid prepolymer resin, exhibiting high compatibility and avoiding problems such as spots and flow marks. The resulting lens yield is high, making it suitable for large-scale industrial production.

[0040] A method for manufacturing a lens: The above-mentioned lens coating solution is uniformly coated on the surface of the lens substrate by dip coating, UV curing, and drying to form a transparent anti-blue light film with a thickness of 300 nanometers.

[0041] This embodiment describes the application of a COF-modified blue dye in blue light blocking glasses.

[0042] This embodiment describes the application of a lens coating in blue light blocking glasses.

[0043] This embodiment describes the application of a lens in blue light blocking glasses.

[0044] A lens is prepared from a COF-modified blue dye according to this embodiment.

[0045] A lens is prepared by a lens coating according to this embodiment.

[0046] A blue light blocking glasses are prepared from a COF-modified blue dye according to this embodiment.

[0047] A blue light blocking glasses is prepared by a lens coating according to this embodiment. Example 2

[0048] A method for preparing COF powder: 2,4,6-tricarboxymethyl phloroglucinol (TPG) and tris(4-aminophenyl)amine (TAPA) in a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane, and an aqueous solution of acetic acid in a volume ratio of 10:10:1. The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene is 1:5, and the concentration of the aqueous solution of acetic acid is 2 mol / L. The resulting mixture is transferred into a Schlenk tube and subjected to four freeze-thaw cycles with liquid nitrogen. The Schlenk tube is then heated to 120°C and reacted for 90 h. After the reaction is completed, the product is washed and vacuum dried to obtain COF powder.

[0049] A method for preparing a COF-modified blue dye: 1 part by weight of COF powder is dispersed in 5 parts by weight of 5 wt% HCl aqueous solution to protonate the COF and obtain a COF dispersion; 1 part by weight of blue dye is dissolved in 10 parts by weight of DMSO, and after mixing evenly, a blue dye dispersion is obtained; the COF dispersion and the blue dye dispersion are mixed evenly at a volume ratio of 1:2, and then 5 parts by weight of polydimethylsiloxane stabilizer is added; after mixing evenly, the mixture is freeze-dried and pulverized to obtain the COF-modified blue dye.

[0050] In this embodiment, the blue dye is Vat Blue 6, chemically named 7,16-dichloro-6,15-dihydrobinaphthene[2,3-a:2',3'-h]phenazine-5,9,14,18-tetraone, with the molecular formula C. 28 H 12 Cl2N2O4.

[0051] A method for preparing a lens coating includes the following steps:

[0052] Step 1: Add 50 parts by weight of bisphenol A epoxy acrylate, 10 parts by weight of polystyrene, 3 parts by weight of maleic anhydride, 5 parts by weight of polyurethane acrylate, 1 part by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.1 parts by weight of triethanolamine and 300 parts by weight of ethanol to a sealed mixing tank, heat to 50°C, set the stirring speed to 3000 rpm, and stir for 5 hours to obtain liquid prepolymer resin.

[0053] Step 2: Add 300 parts by weight of COF modified blue dye liquid to the liquid prepolymer resin, stir and mix at 1000 rpm for 2 hours at room temperature to ensure uniform mixing and no lumps, and obtain the lens coating solution.

[0054] The preparation method of COF modified blue dye liquid is as follows: COF modified blue dye is ultrasonically dissolved in a styrene and DMSO mixed solution with a volume ratio of 1:2. The mass ratio of COF modified blue dye to the mixed solution is 1:50. The ultrasonic temperature is 60℃, the ultrasonic power is 100W, and the ultrasonic time is 10h to obtain COF modified blue dye liquid.

[0055] A method for manufacturing a lens: The above-mentioned lens coating solution is uniformly coated on the surface of the lens substrate by spin coating, spraying or dipping, UV curing and drying to form a 200-nanometer thick anti-blue light transparent film.

[0056] This embodiment describes the application of a COF-modified blue dye in blue light blocking glasses.

[0057] This embodiment describes the application of a lens coating in blue light blocking glasses.

[0058] This embodiment describes the application of a lens in blue light blocking glasses.

[0059] A lens is prepared from a COF-modified blue dye according to this embodiment.

[0060] A lens is prepared by a lens coating according to this embodiment.

[0061] A blue light blocking glasses are prepared from a COF-modified blue dye according to this embodiment.

[0062] A blue light blocking glasses is prepared by a lens coating according to this embodiment. Example 3

[0063] A method for preparing COF powder: 2,4,6-tricarboxymethyl phloroglucinol (TPG) and tris(4-aminophenyl)amine (TAPA) in a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane, and an aqueous solution of acetic acid in a volume ratio of 10:10:2. The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene is 1:15, and the concentration of the aqueous solution of acetic acid is 5 mol / L. The resulting mixture is transferred into a Schlenk tube and subjected to at least three freeze-thaw cycles with liquid nitrogen. The Schlenk tube is then heated to 150°C and reacted for 100 h. After the reaction is completed, the product is washed and vacuum dried to obtain COF powder.

[0064] A method for preparing a COF-modified blue dye: 1 part by weight of COF powder is dispersed in 10 parts by weight of 8 wt% HCl aqueous solution to protonate the COF and obtain a COF dispersion; 3 parts by weight of blue dye is dissolved in 30 parts by weight of DMSO, and after mixing evenly, a blue dye dispersion is obtained; the COF dispersion and the blue dye dispersion are mixed evenly at a volume ratio of 1:3, and then 10 parts by weight of polydimethylsiloxane stabilizer is added, mixed evenly, freeze-dried, and pulverized to obtain the COF-modified blue dye.

[0065] In this embodiment, the blue dye is Vat Blue 6, chemically named 7,16-dichloro-6,15-dihydrobinaphthene[2,3-a:2',3'-h]phenazine-5,9,14,18-tetraone, with the molecular formula C. 28 H 12 Cl2N2O4.

[0066] A method for preparing a lens coating includes the following steps:

[0067] Step 1: Add 80 parts by weight of bisphenol A epoxy acrylate, 20 parts by weight of polystyrene, 5 parts by weight of maleic anhydride, 8 parts by weight of polyurethane acrylate, 2 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.3 parts by weight of triethanolamine and 800 parts by weight of ethanol to a sealed mixing tank, heat to 60°C, set the rotation speed to 5000 rpm, and stir for 8 hours to obtain liquid prepolymer resin.

[0068] Step 2: Add 500 parts by weight of COF modified blue dye liquid to the liquid prepolymer resin, stir and mix at 3000 rpm for 5 hours at room temperature to ensure uniform mixing and no lumps, and obtain the lens coating solution.

[0069] The preparation method of COF modified blue dye liquid is as follows: COF modified blue dye is ultrasonically dissolved in a styrene and DMSO mixed solution with a volume ratio of 1:5. The mass ratio of COF modified blue dye to the mixed solution is 1:80. The ultrasonic temperature is 70℃, the ultrasonic power is 500W, and the ultrasonic time is 18h to obtain COF modified blue dye liquid.

[0070] A method for manufacturing a lens: The above-mentioned lens coating solution is uniformly coated on the surface of the lens substrate by spin coating, spraying or dipping, UV curing and drying to form a 500-nanometer thick anti-blue light transparent film.

[0071] This embodiment describes the application of a COF-modified blue dye in blue light blocking glasses.

[0072] This embodiment describes the application of a lens coating in blue light blocking glasses.

[0073] This embodiment describes the application of a lens in blue light blocking glasses.

[0074] A lens is prepared from a COF-modified blue dye according to this embodiment.

[0075] A lens is prepared by a lens coating according to this embodiment.

[0076] A blue light blocking glasses are prepared from a COF-modified blue dye according to this embodiment.

[0077] A blue light blocking glasses is prepared by a lens coating according to this embodiment. Example 4

[0078] The only difference between this embodiment and Embodiment 1 is that:

[0079] The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene was 1:8, and the concentration of the aqueous acetic acid solution was 4 mol / L.

[0080] A method for preparing a lens coating: 65 parts by weight of bisphenol A epoxy acrylate, 13 parts by weight of polystyrene, 3 parts by weight of maleic anhydride, 7 parts by weight of polyurethane acrylate, 1 part by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.3 parts by weight of triethanolamine and 600 parts by weight of ethanol are added to a sealed mixing tank. Example 5

[0081] The only difference between this embodiment and Embodiment 1 is that:

[0082] The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene was 1:12, and the concentration of the aqueous acetic acid solution was 3 mol / L.

[0083] A method for preparing a lens coating: 75 parts by weight of bisphenol A epoxy acrylate, 17 parts by weight of polystyrene, 5 parts by weight of maleic anhydride, 8 parts by weight of polyurethane acrylate, 2 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.1 parts by weight of triethanolamine and 400 parts by weight of ethanol are added to a sealed mixing tank. Example 6

[0084] The only difference between this embodiment and Embodiment 1 is that:

[0085] The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol (TPG) to mesitylene was 1:14, and the concentration of the aqueous acetic acid solution was 2 mol / L.

[0086] A method for preparing a lens coating: 55 parts by weight of bisphenol A epoxy acrylate, 15 parts by weight of polystyrene, 3 parts by weight of maleic anhydride, 4 parts by weight of polyurethane acrylate, 1 part by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.2 parts by weight of triethanolamine and 700 parts by weight of ethanol are added to a sealed mixing tank.

[0087] Comparative Example 1

[0088] The only difference between this comparative example and Example 1 is that the blue dye was not modified with COF.

[0089] Specifically, a method for preparing a lens coating includes the following steps:

[0090] Step 1: Add 65 parts by weight of bisphenol A epoxy acrylate, 15 parts by weight of polystyrene, 4 parts by weight of maleic anhydride, 6 parts by weight of polyurethane acrylate, 1.5 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.2 parts by weight of triethanolamine and 500 parts by weight of ethanol to a sealed mixing tank, heat to 55°C, set the stirring speed to 4000 rpm, and stir for 6 hours to obtain liquid prepolymer resin.

[0091] Step 2: Add 400 parts by weight of blue dye liquid to the liquid prepolymer resin, stir and mix at 2000 rpm for 3 hours at room temperature to ensure uniform mixing and no lumps, and obtain the lens coating solution.

[0092] The preparation method of blue dye liquid is as follows: blue dye is dissolved by ultrasonication in a styrene and DMSO mixed solution with a volume ratio of 1:3. The mass ratio of blue dye to mixed solution is 1:70. The ultrasonic temperature is 65℃, the ultrasonic power is 300W, and the ultrasonic time is 12h to obtain blue dye liquid.

[0093] A method for manufacturing a lens: The above-mentioned lens coating solution is uniformly coated on the surface of the lens substrate by dip coating, UV curing, and drying to form a transparent anti-blue light film with a thickness of 300 nanometers.

[0094] Comparative Example 2

[0095] The only difference between this and Example 1 is that 7 parts by weight of polydimethylsiloxane stabilizer were not added.

[0096] The transmittance (%) and blue light transmittance (T%) of the lenses in Examples 1 to 6 and Comparative Examples 1 to 2 were measured using an ultraviolet / visible spectrometer. The blue light blocking rate (%) = 100% - blue light transmittance (T%). The specific results are shown in Table 1 below.

[0097] Table 1. Data on light transmittance and blue light blocking rate

[0098] transmittance % Blue light blocking rate % Example 1 96.4 25.8 Example 2 95.8 20.3 Example 3 95.0 30.5 Example 4 95.5 22.6 Example 5 96.1 22.9 Example 6 97.2 26.8 Comparative Example 1 80.4 50.9 Comparative Example 2 85.3 10.6

[0099] Therefore, the coating of this invention, as a blue light reflective film, has a blue light transmittance between 20.3% and 30.5%, providing moderate blue light blocking. It achieves blue light protection while maintaining visual clarity, and the lens transmittance is ≥95%, ensuring clear vision. Thus, the coating of this invention achieves suitable blue light protection, protecting the eyes while providing clear and realistic vision. In contrast, Comparative Example 1, due to the lack of COF modification of the blue dye, resulted in uneven dispersion, leading to decreased lens transmittance and increased blue light blocking, causing visual distortion and hindering visual development. Comparative Example 2, lacking a polydimethylsiloxane stabilizer, also resulted in decreased lens transmittance and unclear vision, while simultaneously increasing blue light transmittance and decreasing blue light blocking, causing more blue light to enter the wearer's retina, potentially leading to visual fatigue and other problems.

[0100] Furthermore, the lens coatings obtained in this embodiment are free from spots and flow marks, resulting in a high yield and suitability for large-scale industrial production.

[0101] It should be understood that, in order to simplify this disclosure and aid in understanding one or more of the various aspects of the invention, features of the invention are sometimes grouped together in a single embodiment or description thereof in the above description of exemplary embodiments of the invention. However, this method of disclosure should not be interpreted as reflecting an intention that the claimed invention requires more features than expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in fewer than all the features of the foregoingly disclosed embodiments. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of the invention.

[0102] Although the invention has been described with reference to a limited number of embodiments, those skilled in the art will understand from the foregoing description that other embodiments are conceivable within the scope of the invention described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for the purpose of interpreting or limiting the subject matter of the invention. Therefore, many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. The disclosure of the invention is illustrative and not restrictive, and the scope of the invention is defined by the appended claims.

[0103] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for preparing a COF-modified blue dye, characterized in that, Includes the following steps: Step 1, Preparation of COF powder: 2,4,6-tricarboxymethyl phloroglucinol and tris(4-aminophenyl)amine in a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane and acetic acid aqueous solution in a volume ratio of 10:10:(1~2). The mass ratio of 2,4,6-tricarboxymethyl phloroglucinol and mesitylene is 1:(5~15). The concentration of the acetic acid aqueous solution is 2~5 mol / L. The resulting mixture is transferred into a Schlenk tube and subjected to at least three freeze-thaw cycles with liquid nitrogen. The Schlenk tube is heated to 120~150℃ and reacted for at least 72 h. After the reaction is completed, the product is washed and vacuum dried to obtain COF powder. Step 2, Preparation method of COF modified blue dye: Disperse 1 part by weight of COF powder in 5-10 parts by weight of 5-8 wt% HCl aqueous solution to obtain COF dispersion; Dissolve 1-3 parts by weight of blue dye in 10-30 parts by weight of DMSO, mix evenly to obtain blue dye dispersion; Mix COF dispersion and blue dye dispersion in a volume ratio of 1:(2-3) evenly, then add 5-10 parts by weight of polydimethylsiloxane stabilizer, mix evenly, freeze dry and pulverize to obtain COF modified blue dye; The blue dye is either Disperse Blue RRL or Vat Blue 6.

2. The COF-modified blue dye obtained by the preparation method of the COF-modified blue dye according to claim 1.

3. A lens coating comprising the COF-modified blue dye of claim 2.

4. The method for preparing the lens coating according to claim 3, characterized in that, Includes the following steps: Step 1: Add 50-80 parts by weight of bisphenol A epoxy acrylate, 10-20 parts by weight of polystyrene, 3-5 parts by weight of maleic anhydride, 5-8 parts by weight of polyurethane acrylate, 1-2 parts by weight of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.1-0.3 parts by weight of triethanolamine and 300-800 parts by weight of ethanol to a sealed mixing tank, heat to 50-60°C, set the rotation speed to 3000-5000 rpm, and stir for at least 5 hours to obtain liquid prepolymer resin; Step 2: Add 300-500 parts by weight of COF-modified blue dye liquid to the liquid prepolymer resin, and stir and mix at 1000-3000 rpm at room temperature for at least 2 hours to ensure uniform mixing and no lumps, to obtain the lens coating solution.

5. The method for preparing the lens coating according to claim 4, characterized in that, The preparation method of COF modified blue dye liquid is as follows: COF modified blue dye is ultrasonically dissolved in a styrene and DMSO mixed solution with a volume ratio of 1:(2~5). The mass ratio of COF modified blue dye to the mixed solution is 1:(50~80). The ultrasonic temperature is 60~70℃, the ultrasonic power is 100~500W, and the ultrasonic time is at least 10h to obtain COF modified blue dye liquid.

6. A lens comprising the lens coating of claim 3.

7. The method for preparing a lens according to claim 6, characterized in that, Includes the following steps: The above-mentioned lens coating solution is uniformly applied to the surface of the lens substrate by spin coating, spraying or dipping. After UV curing, it is dried to form a transparent anti-blue light film with a thickness of 200~500 nanometers.

8. The application of a COF-modified blue dye according to claim 2 in blue light blocking glasses.

9. The application of the lens coating according to claim 3 in blue light blocking glasses.