COF modified blue dye, lens coating, lens as well as preparation method and application of COF modified blue dye

Abstract

The invention 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 1, preparing COF powder; step 2, a preparation method of the COF modified blue dye: dispersing 1 part by weight of COF powder in 5-10 parts by weight of 5-8wt% HCl aqueous solution to obtain a COF dispersion liquid; the preparation method comprises the following steps: dissolving 1-3 parts by weight of a blue dye in 10-30 parts by weight of DMSO, uniformly mixing to obtain a blue dye dispersion liquid, uniformly mixing the COF dispersion liquid and the blue dye dispersion liquid, adding a polydimethylsiloxane stabilizer, freeze-drying, and crushing to obtain the product. According to the lens coating obtained by the invention, the blue dye is uniformly dispersed, the blue light reflecting effect is excellent, and meanwhile, an object is clearly seen without distortion; the problems of spots and flow marks are avoided, the yield is high, and the method is suitable for industrial mass production.

Description

TECHNICAL FIELD

[0001] The present application relates to a COF modified blue dye, a lens coating, a lens and a preparation method and application thereof, in particular to a 1.60 series 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. BACKGROUND

[0002] Blue light refers to high-energy visible light with a wavelength of 380-500 nm. It has a short wavelength and high energy, can directly penetrate the cornea and lens to reach the retina, and can stimulate the retina to produce a large number of free radicals, thereby damaging the cells on the retina that are sensitive to light. With the accumulation of time, this damage will gradually affect vision, leading to problems such as decreased vision, blurred vision, and visual fatigue. Blue light is commonly found in car screens, bathroom heaters, computer and mobile phone liquid crystal screens, LED lights, movie screens, and other household appliances. In particular, if the driver stares at the car screen for a long time, especially at night, and frequently checks the navigation screen, the blue light will continuously stimulate the eyes, leading to increased visual fatigue, which greatly increases the risk of fatigue driving.

[0003] Preventing long-term exposure to blue light is the most effective way to reduce damage, and using anti-blue light lenses can effectively solve this problem. There are many types of anti-blue light lens coatings on the market, but the current anti-blue light lens coatings have the problems of poor stability of anthraquinone dyes, easy degradation of anthraquinone dyes over a long period of time, and poor wear resistance of the coating, which leads to the loss of anti-blue light effect after the coating is worn off. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a COF modified blue dye. After the blue dye is modified by a covalent organic framework, the blue dye is uniformly dispersed. With the assistance of a stabilizer, the interfacial polymerization ability of the blue dye with the resin is stronger, the stability is better, the anthraquinone dye is not easily degraded, and the anti-blue light effect lasts for a long time.

[0005] Meanwhile, the present application provides a lens coating, which has uniformly dispersed blue dye and excellent blue light reflection effect, and clear and distortion-free vision.

[0006] Meanwhile, the present application provides a preparation method of a COF modified blue dye.

[0007] Meanwhile, the present application provides a preparation method of a lens coating.

[0008] Meanwhile, the present application provides an application of a COF modified blue dye.

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

[0010] To solve the above technical problems, the technical scheme adopted by the present application is: A preparation method of COF powder: 2,4,6-triformylphloroglucinol TPG and tris(4-aminophenyl)amine TAPA with a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane and aqueous acetic acid with a volume ratio of 10:10:(1~2), the mass ratio of 2,4,6-triformylphloroglucinol TPG to mesitylene is 1:(5~15), and the concentration of aqueous acetic acid is 2~5 mol / L, the obtained mixture is moved into a Schlenk tube, at least three freeze-thaw cycles are carried out by using liquid nitrogen, the Schlenk tube is heated to 120~150 DEG C for reaction for at least 72 h, and after the reaction is completed, the product is cleaned and vacuum dried to obtain the COF powder.

[0011] A preparation method of 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, to obtain a COF dispersion liquid; 1~3 parts by weight of blue dye is dissolved in 10~30 parts by weight of DMSO, and after being uniformly mixed, a blue dye dispersion liquid is obtained, the COF dispersion liquid and the blue dye dispersion liquid with a volume ratio of 1:(2~3) are uniformly mixed, and then 5~10 parts by weight of polydimethylsiloxane stabilizer is added, and after being uniformly mixed, freeze-drying and crushing are carried out, to obtain the COF modified blue dye.

[0012] The blue dye is dispersion blue RRL or vat blue 6, the chemical name of dispersion blue RRL is 1-hydroxy-4-[(4-methylphenyl)amino]anthracene-9,10-dione, the molecular formula is C 21 H 15 The vat blue 6 (Vat Blue 6) has a chemical name of 7,16-dichloro-6,15-dihydrocinnolinophenazine-5,9,14,18-tetraone, and a molecular formula of C 28 H 12 Cl2N2O4.

[0013] A preparation method of a lens coating, comprising the following steps: Step one, 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-diphenyl phosphine oxide, 0.1~0.3 parts by weight of triethanolamine and 300~800 parts by weight of ethanol are added to a sealed batching bucket, the temperature is raised to 50~60 DEG C, the rotation speed is set to 3000~5000 rpm, and the liquid prepolymer resin is prepared after stirring for at least 5 hours; Step two, add 300-500 parts by weight of COF modified blue dye liquid to the liquid prepolymer resin, stir at 1000-3000 rpm at room temperature for at least 2 h to ensure uniform mixing and no caking, and obtain a lens coating solution; The preparation method of the COF modified blue dye liquid is as follows: the COF modified blue dye is ultrasonically dissolved in a mixed solution of styrene and DMSO in a volume ratio of 1: (2-5), the mass ratio of the COF modified blue dye to the mixed solution is 1: (50-80), the ultrasonic temperature is 60-70 DEG C, the ultrasonic power is 100-500 W, and the ultrasonic time is at least 10 h to obtain the COF modified blue dye liquid.

[0014] A lens is prepared by the following method: the lens coating solution is uniformly coated on the surface of the lens substrate by a spin coating, spray coating or dip coating method, and then UV cured and dried to form an anti-blue light transparent film with a thickness of 200-500 nm.

[0015] The application of the COF modified blue dye in the anti-blue light glasses.

[0016] The application of the lens coating in the anti-blue light glasses.

[0017] The application of the lens in the anti-blue light glasses.

[0018] A lens is prepared by the following method: the lens coating solution is uniformly coated on the surface of the lens substrate by a spin coating, spray coating or dip coating method, and then UV cured and dried to form an anti-blue light transparent film with a thickness of 200-500 nm.

[0019] A lens is prepared by the following method: the lens coating solution is uniformly coated on the surface of the lens substrate by a spin coating, spray coating or dip coating method, and then UV cured and dried to form an anti-blue light transparent film with a thickness of 200-500 nm.

[0020] An anti-blue light glasses is prepared by the following method: the COF modified blue dye is uniformly coated on the surface of the lens substrate by a spin coating, spray coating or dip coating method, and then UV cured and dried to form an anti-blue light transparent film with a thickness of 200-500 nm.

[0021] An anti-blue light glasses is prepared by the following method: the lens coating is uniformly coated on the surface of the lens substrate by a spin coating, spray coating or dip coating method, and then UV cured and dried to form an anti-blue light transparent film with a thickness of 200-500 nm.

[0022] Compared with the prior art, the beneficial effects of the present application are: The COF powder has excellent wear resistance, high stability and low friction coefficient. Since the COF material is connected by covalent bond, when the blue dye of the present application is crosslinked with the COF material by covalent bond, the dispersion and stability of the anthraquinone dye can be significantly improved, the anthraquinone dye is not easy to degrade for long-term use, and the wear resistance of the anti-blue light coating is significantly improved, and the anti-blue light effect lasts for a long time.

[0023] The coating of the present application uses 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide as a photoinitiator, which acts on the unsaturated polyester and acrylate photocuring system of the present application to realize rapid curing of the material under light; triethanolamine as a catalyst promotes the curing reaction and improves adhesion; the addition of maleic anhydride can improve the adhesion strength and adhesion of the liquid prepolymer resin; the components in the coating interact synergistically, and the final anti-blue light film has high bonding strength with the lens substrate, strong adhesion, long-lasting anti-blue light effect, long service life, and the COF modified blue dye is easily dispersed in the liquid prepolymer resin, has high compatibility, avoids the problems of spots and flow marks, and has high yield of finished lenses, which is suitable for industrial mass production.

[0024] The coating of the present application is used as a blue light reflecting film, and the blue light transmittance is between 20.3~30.5%, the blue light blocking effect is moderate, it can play a blue light protection effect while not distorting the vision, and the transmittance of the lens is ≥95%, the vision is clear, so the coating of the present application realizes suitable blue light protection, clear and true vision while protecting the eyes, and is not easy to cause visual fatigue and other problems. DETAILED DESCRIPTION

[0025] The present application will be further described in detail below in combination with specific examples. The following examples are only used to illustrate the present application and not to limit the scope of the present application. Example 1

[0026] A COF powder preparation method: 2,4,6-triformylphloroglucinol TPG and tris(4-aminophenyl)amine TAPA with a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane and aqueous acetic acid with a volume ratio of 10:10:1.5, the mass ratio of 2,4,6-triformylphloroglucinol TPG to mesitylene is 1:10, and the concentration of aqueous acetic acid is 3mol / L, the obtained mixture is moved into a Schlenk tube, three freeze-thaw cycles are carried out with liquid nitrogen, the Schlenk tube is heated to 130℃ for 72h, after the reaction is completed, the product is cleaned, vacuum dried to obtain COF powder.

[0027] A COF modified blue dye preparation method: 1 part by weight of COF powder is dispersed in 8 parts by weight of 6wt% HCl aqueous solution to protonate the COF to obtain a COF dispersion; 2 parts by weight of blue dye is dissolved in 20 parts by weight of DMSO, and after mixing uniformly, a blue dye dispersion is obtained, the COF dispersion and the blue dye dispersion are mixed uniformly in a volume ratio of 1:2.5, then 7 parts by weight of polydimethylsiloxane stabilizer is added, mixed uniformly, freeze-dried and crushed to obtain the COF modified blue dye.

[0028] In this embodiment, the blue dye is Disperse Blue RRL, the chemical name is 1-hydroxy-4-[(4-methylphenyl)amino]anthracene-9,10-dione, the molecular formula is C 21 H 15 NO3.

[0029] The COF powder obtained in this embodiment has excellent wear resistance, high stability and low friction coefficient. Since the COF material is connected by covalent bond, when the blue dye of this embodiment is crosslinked with the COF material by covalent bond, not only the dispersibility of anthraquinone dye can be significantly improved, but also the stability of anthraquinone dye can be improved. The anthraquinone dye is not easy to degrade for long-term use, and the wear resistance of the anti-blue light coating is significantly improved, and the anti-blue light effect lasts for a long time.

[0030] A preparation method of a lens coating, comprising the following steps: Step one, 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-diphenyl phosphine oxide, 0.2 parts by weight of triethanolamine and 500 parts by weight of ethanol are added to a sealed batching bucket, the temperature is raised to 55℃, the rotation speed is set to 4000r / min, and the liquid prepolymer resin is prepared by stirring for 6 hours; Step two, 400 parts by weight of COF modified blue dye liquid is added to the liquid prepolymer resin, stirred at 2000rpm at room temperature for 3h to ensure uniform mixing without clumping, and a lens coating solution is obtained; The preparation method of the COF modified blue dye liquid is: the COF modified blue dye is ultrasonically dissolved in a mixed solution of styrene and DMSO with a volume ratio of 1:3, the mass ratio of the 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, and the COF modified blue dye liquid is obtained.

[0031] In the coating of this embodiment, 2,4,6-trimethylbenzoyl-diphenyl phosphine oxide is used as a photoinitiator, which acts on the unsaturated polyester and acrylate photocuring system of this embodiment to realize rapid curing of the material under light conditions; triethanolamine is used as a catalyst to promote the curing reaction and improve the adhesion; the addition of maleic anhydride can improve the adhesion strength and adhesion of the liquid prepolymer resin; the components in the coating interact synergistically, and finally the anti-blue light film obtained has high bonding strength and adhesion to the lens substrate, long-lasting anti-blue light effect, long service life, and the COF modified blue dye is easily dispersed in the liquid prepolymer resin, has high compatibility, avoids the problems of spots and flow marks, and has high yield of finished lenses, which is suitable for industrial mass production.

[0032] A lens manufacturing method: the lens coating solution is uniformly coated on the surface of the lens substrate by dip coating method, and after UV curing, drying, an anti-blue light transparent film with a thickness of 300 nanometers is formed.

[0033] Application of a COF modified blue dye in anti-blue light glasses in the embodiment.

[0034] Application of a lens coating in anti-blue light glasses in the embodiment.

[0035] Application of a lens in anti-blue light glasses in the embodiment.

[0036] A lens prepared from a COF modified blue dye in the embodiment.

[0037] A lens prepared from a lens coating in the embodiment.

[0038] An anti-blue light glasses prepared from a COF modified blue dye in the embodiment.

[0039] An anti-blue light glasses prepared from a lens coating in the embodiment. Embodiment 2

[0040] A COF powder preparation method: 2,4,6-triformylphloroglucinol TPG and tris(4-aminophenyl)amine TAPA with a molar ratio of 1:1 are uniformly dispersed in a mixed solution of mesitylene, 1,4-dioxane and aqueous acetic acid with a volume ratio of 10:10:1, the mass ratio of 2,4,6-triformylphloroglucinol TPG to mesitylene is 1:5, and the concentration of aqueous acetic acid is 2 mol / L, the obtained mixture is moved into a Schlenk tube, 4 freeze-thaw cycles are carried out with liquid nitrogen, the Schlenk tube is heated to 120℃ for 90h, after the reaction is completed, the product is cleaned, vacuum dried to obtain a COF powder.

[0041] A COF modified blue dye preparation method: 1 part by weight of COF powder is dispersed in 5 parts by weight of 5wt% HCl aqueous solution to protonate the COF, to obtain a COF dispersion; 1 part by weight of blue dye is dissolved in 10 parts by weight of DMSO, and after mixing uniformly, a blue dye dispersion is obtained, the COF dispersion and the blue dye dispersion are mixed uniformly in a volume ratio of 1:2, then 5 parts by weight of polydimethylsiloxane stabilizer is added, mixed uniformly, freeze-dried, and crushed to obtain the COF modified blue dye.

[0042] In the embodiment, the blue dye is Vat Blue 6, the chemical name is 7,16-dichloro-6,15-dihydrocinnolinophthalazine-5,9,14,18-tetraone, the molecular formula is C28 H 12 Cl2N2O4.

[0043] A method for preparing a lens coating, comprising the following steps: Step one, 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-diphenyl phosphine oxide, 0.1 parts by weight of triethanolamine and 300 parts by weight of ethanol are added to a sealed batching bucket, heated to 50℃, the rotation speed is set to 3000r / min, and stirred for 5 hours to prepare a liquid prepolymer resin; Step two, add 300 parts by weight of COF modified blue dye liquid to the liquid prepolymer resin, stir at room temperature at 1000rpm for 2h to ensure uniform mixing without clumping, and obtain a lens coating solution; The preparation method of the COF modified blue dye liquid is: ultrasonic dissolution of the COF modified blue dye in a mixed solution of styrene and DMSO in a volume ratio of 1:2, the mass ratio of the 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 the COF modified blue dye liquid.

[0044] A method for preparing a lens: uniformly covering the lens coating solution on the surface of the lens substrate by spin coating, spraying or dipping coating method, and then UV curing, drying to form a blue light resistant transparent film with a thickness of 200 nanometers.

[0045] Application of a COF modified blue dye of the embodiment in blue light prevention glasses.

[0046] Application of a lens coating of the embodiment in blue light prevention glasses.

[0047] Application of a lens of the embodiment in blue light prevention glasses.

[0048] A lens prepared from a COF modified blue dye of the embodiment.

[0049] A lens prepared from a lens coating of the embodiment.

[0050] A blue light prevention glasses prepared from a COF modified blue dye of the embodiment.

[0051] A blue light prevention glasses prepared from a lens coating of the embodiment. Example 3

[0052] A method for preparing a COF powder: 2,4,6-triformylphloroglucinol 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 aqueous acetic acid in a volume ratio of 10:10:2, the mass ratio of 2,4,6-triformylphloroglucinol TPG to mesitylene is 1:15, and the concentration of aqueous acetic acid is 5 mol / L; the obtained mixture is transferred into a Schlenk tube, subjected to at least three freeze-thaw cycles with liquid nitrogen, and then heated to 150 DEG C for 100 h; after the reaction is completed, the product is washed and vacuum dried to obtain the COF powder.

[0053] A method for preparing a COF modified blue dye: 1 part by weight of the COF powder is dispersed in 10 parts by weight of an 8wt% HCl aqueous solution to protonate the COF, to obtain a COF dispersion; 3 parts by weight of the blue dye is dissolved in 30 parts by weight of DMSO, and after being uniformly mixed, a blue dye dispersion is obtained; the COF dispersion and the blue dye dispersion in a volume ratio of 1:3 are uniformly mixed, and then 10 parts by weight of a polydimethylsiloxane stabilizer is added; after being uniformly mixed, the mixture is freeze-dried and crushed to obtain the COF modified blue dye.

[0054] In this embodiment, the blue dye is Vat Blue 6, the chemical name of which is 7,16-dichloro-6,15-dihydrocinnolinophenazine-5,9,14,18-tetraone, the molecular formula of which is C 28 H 12 Cl2N2O4.

[0055] A method for preparing a lens coating, comprising the following steps: Step one: 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-diphenyl phosphine oxide, 0.3 parts by weight of triethanolamine and 800 parts by weight of ethanol are added to a sealed batching bucket, the temperature is raised to 60 DEG C, the rotation speed is set to 5000 rpm, and the liquid prepolymer resin is prepared by stirring for 8 hours; Step two: 500 parts by weight of the COF modified blue dye liquid is added to the liquid prepolymer resin, and the mixture is stirred at room temperature at 3000 rpm for 5 h to ensure uniform mixing and no caking, to obtain the lens coating solution; The preparation method of the COF modified blue dye liquid is as follows: the COF modified blue dye is ultrasonically dissolved in a mixed solution of styrene and DMSO in a volume ratio of 1:5, the mass ratio of the COF modified blue dye to the mixed solution is 1:80, the ultrasonic temperature is 70 DEG C, the ultrasonic power is 500 W, and the ultrasonic time is 18 h, so that the COF modified blue dye liquid is obtained.

[0056] A lens preparation method: the lens coating solution is uniformly coated on the surface of the lens substrate by a spin coating, spray coating or dip coating method, and after UV curing, drying, an anti-blue light transparent film with a thickness of 500 nm is formed.

[0057] The application of the COF modified blue dye in the anti-blue light glasses.

[0058] The application of the lens coating in the anti-blue light glasses.

[0059] The application of the lens in the anti-blue light glasses.

[0060] A lens prepared from the COF modified blue dye.

[0061] A lens prepared from the lens coating.

[0062] An anti-blue light glasses prepared from the COF modified blue dye.

[0063] An anti-blue light glasses prepared from the lens coating. Example 4

[0064] The difference between this embodiment and example 1 is only that: The mass ratio of 2,4,6-triformylphloroglucinol TPG to mesitylene is 1:8, and the concentration of the aqueous acetic acid solution is 4 mol / L.

[0065] A lens coating preparation method: 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-diphenyl phosphine oxide, 0.3 parts by weight of triethanolamine and 600 parts by weight of ethanol are added to a sealed batching bucket. Example 5

[0066] The difference between this embodiment and example 1 is only that: The mass ratio of 2,4,6-triformylphloroglucinol TPG to mesitylene is 1:12, and the concentration of the aqueous acetic acid solution is 3 mol / L.

[0067] 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-diphenyl phosphine oxide, 0.1 parts by weight of triethanolamine and 400 parts by weight of ethanol are added to a sealed batching bucket. Example 6

[0068] The difference between this example and Example 1 is only that: The mass ratio of 2,4,6-triformylphloroglucinol TPG and mesitylene is 1:14, and the concentration of aqueous acetic acid is 2 mol / L.

[0069] 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-diphenyl phosphine oxide, 0.2 parts by weight of triethanolamine and 700 parts by weight of ethanol are added to a sealed batching bucket.

[0070] Comparative Example 1

[0071] The difference between this example and Example 1 is only that: the blue dye is not modified by COF.

[0072] Specifically, a method for preparing a lens coating, comprising the following steps: Step one, 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-diphenyl phosphine oxide, 0.2 parts by weight of triethanolamine and 500 parts by weight of ethanol are added to a sealed batching bucket, heated to 55℃, the speed is set to 4000r / min, stirring for 6 hours to obtain a liquid prepolymer resin; Step two, add 400 parts by weight of blue dye liquid to the liquid prepolymer resin, stir at room temperature 2000rpm for 3h, ensure uniform mixing, no clumping, obtain lens coating solution; The preparation method of the blue dye liquid is: the blue dye is ultrasonically dissolved in a mixed solution of styrene and DMSO 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, the ultrasonic time is 12h, and the blue dye liquid is obtained.

[0073] A method for preparing a lens: the above lens coating solution is uniformly coated on the surface of the lens substrate by dip coating method, and after UV curing, drying, an anti-blue light transparent film with a thickness of 300 nanometers is formed.

[0074] Comparative Example 2

[0075] The difference between the present and Example 1 is that 7 parts by weight of polydimethylsiloxane stabilizer is not added.

[0076] The transmittance % and blue light penetration rate (T%) of the lenses of Example 1 to Example 6 and Comparative Example 1 to Comparative Example 2 were measured using an ultraviolet / visible light spectrometer, and the blue light blocking rate % = 100% - blue light penetration rate T%. The specific results are shown in Table 1 below.

[0077] Table 1 Transmittance and Blue Light Blocking Rate Data Table % 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 It can be seen that the coating of the present application is a blue light reflecting film, the blue light penetration rate is between 20.3% and 30.5%, the blue light blocking effect is moderate, it plays a blue light protection effect while not distorting the view, and the transmittance of the lens is ≥95%, the view is clear, it can be seen that the coating of the present application realizes suitable blue light protection, eye protection while the view is clear and real. Comparative Example 1, because the blue dye is not modified by COF, the blue dye is not uniformly dispersed, resulting in a decrease in the transmittance of the lens, and at the same time, the blue light blocking rate is high, which distorts the view and is not conducive to visual development. Comparative Example 2, because polydimethylsiloxane stabilizer is not added, it also leads to a decrease in the transmittance of the lens, the view is not clear, at the same time, the blue light penetration rate is high, the blue light blocking rate is low, which leads to more blue light entering the retina of the wearer, which is easy to cause visual fatigue and other problems.

[0078] And the lens coating obtained in the present example has no problem of spots and flow marks, the yield is high, and is suitable for industrial mass production.

[0079] It should be understood that the individual features of the application have sometimes been grouped together in a single embodiment or description thereof in the above description of illustrative embodiments of the application in order to streamline the disclosure and assist with the understanding of one or more individual inventive aspects. However, the method of the disclosure is not to be interpreted as reflecting an intention to claim more than the features explicitly recited in each claim. Rather, the inventive aspects lie in less than all of the features of the previously disclosed embodiments, as reflected in the claims. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, wherein each claim is a separate embodiment of the application.

[0080] 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.

[0081] 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 (TPG) to mesitylene is 1:(5~15), and the concentration of 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.

2. The method for preparing a COF-modified blue dye according to claim 1, characterized in that, The blue dye is either Disperse Blue RRL or Vat Blue 6.

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

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

5. The method for preparing the lens coating according to claim 4, 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.

6. The method for preparing the lens coating according to claim 5, 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.

7. A lens comprising the lens coating of claim 4.

8. The method for preparing a lens according to claim 7, 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.

9. The application of a COF-modified blue dye according to claim 1 or 2 in blue light blocking glasses.

10. The application of the lens coating according to claim 4 in blue light blocking glasses.