UV and blue light blocking coating solution, glass and laminated glass

Abstract

The UV and blue light blocking coating liquid contains silica sol and a chelating agent. The silica sol contains silicate, a first solvent, a first coupling agent, a first catalyst, and deionized water. The chelating agent contains a UV absorber, a blue light absorber, a second solvent, a second catalyst, and a second coupling agent. The UV and blue light blocking glass comprises a curved glass sheet (1) and a UV and blue light blocking coating (2). The UV and blue light blocking laminated glass comprises a UV and blue light blocking glass sheet, an intermediate adhesive layer, and a second glass sheet.

Description

[Technical Field]

[0001] REFERENCE TO RELATED APPLICATIONS This application claims priority from Chinese Patent Application No. 202011469860.1, filed on December 15, 2020, entitled "UV and blue light blocking coating liquid, glass, and manufacturing method thereof," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the technical field of surface coatings, and more particularly to functional coatings applied to glass surfaces. Specifically, the present invention provides UV and blue light blocking coating solutions, UV and blue light blocking glass, and UV and blue light blocking laminated glass, as well as UV and blue light blocking laminated glass that can be dimmed or illuminated. [Background technology]

[0003] Surface coating technology can be used to form functional coatings on substrate surfaces to meet requirements such as infrared blocking, ultraviolet blocking, hydrophobicity, oil phobicity, and anti-fogging. UV-blocking coatings significantly reduce UV transmittance, mitigate UV-related health risks, and prevent short-term aging and discoloration of automotive and residential interiors. Forming UV-blocking coatings on glass substrates is a mature technology, as disclosed in Japanese Patent JP2009184882A (Patent Publication 2009-184882) and Japanese Patent JP2013189345A (Patent Publication 2013-189345) and Chinese Patents CN102892851A, CN103347833A, and CN111819160A. A UV-blocking coating is formed by applying a UV-blocking coating liquid to the surface of a glass substrate. Glass substrates with UV-blocking coatings have excellent UV-blocking capabilities and mechanical durability, such as high hardness and abrasion resistance.

[0004] In the visible light spectrum, light with a wavelength range of 400 nm to 500 nm is generally defined as blue light. Short-wavelength blue light in the wavelength range of 400 nm to 420 nm has high energy and can cause visual fatigue, glare, and retinal damage, such as macular degeneration. Therefore, there is a need to reduce the transmittance of short-wavelength blue light. Chinese Patent CN109455945A discloses a reflective blue-light blocking glass and a manufacturing method thereof. The reflective blue-light blocking glass comprises a glass substrate and a blue-light blocking coating. The blue-light blocking coating is formed from a reflective coating solution and has a blue-light reflectance of 50% in the wavelength range of 400 to 450 nm. Its abrasion resistance does not meet the performance requirements for surface coatings on automotive glass, making it primarily applicable to electronic products.

[0005] Furthermore, Chinese Patent CN111201457A discloses a glass structure comprising a pair of glass plates, a photochromic element disposed between the pair of glass plates, and an ultraviolet absorbing layer disposed between the photochromic element and one of the glass plates. The ultraviolet absorbing layer has a maximum transmittance of 10% or less in the wavelength range of 370 nm to 400 nm, and a maximum transmittance of 50% or more in the wavelength range of more than 400 nm to 420 nm. If the maximum transmittance in the wavelength range of more than 400 nm to 420 nm is less than 50%, the glass structure appears colored when irradiated with sunlight. Summary of the Invention

[0006] The technical problem to be solved by the present invention is the drawback that the blue light blocking coating and UV absorbing layer in the prior art cannot simultaneously block UV and blue light. In response to this, the present invention provides a UV and blue light blocking coating liquid, UV and blue light blocking glass formed by applying the UV and blue light blocking coating liquid, and a method for manufacturing the UV and blue light blocking glass. At the same time, the present invention also provides a UV and blue light blocking laminated glass that can be dimmed or illuminated.

[0007] In the present invention, the technical solutions to the above technical problems include the following: The ultraviolet and blue light blocking coating liquid is used to form an ultraviolet and blue light blocking coating on the surface of a substrate, and contains silica sol and a chelating agent. The silica sol contains, in mass %, 15% to 35% silicate, 30% to 60% first solvent, 5% to 15% first coupling agent, 0.01% to 1% first catalyst, and 10% to 30% deionized water. The chelating agent contains, in mass %, 1% to 15% of an ultraviolet absorber, 1% to 15% of a blue light absorber, 40% to 60% of a second solvent, 0.01% to 1% of a second catalyst, and 10% to 30% of a second coupling agent.

[0008] Preferably, 5% to 20% by mass of a chelating agent is added to each silica sol.

[0009] Preferably, the silicate is selected from at least one of tetramethyl orthosilicate, tetraethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane.

[0010] Preferably, both the first coupling agent and the second coupling agent are selected from at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, [3-(2,3-epoxypropoxy)-propyl]-trimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane.

[0011] Preferably, the first solvent is at least one of methanol, ethanol, propanol, isopropanol, butanol, and propylene glycol methyl ether, and the second solvent is at least one of butyl acetate, propylene glycol methyl ether, isobutyl acetate, and xylene.

[0012] Preferably, the first catalyst is at least one of hydrochloric acid, nitric acid, and ammonia solution, and the second catalyst is at least one of dibutyltin dilaurate, an organobismuth catalyst, and tin(II) bis(2-ethylhexanoate).

[0013] Preferably, the ultraviolet absorber has a maximum absorption peak within a wavelength range of 330 nm to 370 nm, and the blue light absorber has a maximum absorption peak within a wavelength range of 400 nm to 420 nm.

[0014] Preferably, the hydroxyl group content in the ultraviolet absorber is 5% by mass or more, and the ultraviolet absorber is selected from at least one of a benzophenone-based ultraviolet absorber, a benzimidazole-based ultraviolet absorber, and a triazine-based ultraviolet absorber.

[0015] Preferably, the hydroxyl group content in the blue light absorber is 5% by mass or more, and the blue light absorber is selected from at least one of an azo-based blue light absorber, an isoindolinone-based blue light absorber, a quinophthalone-based blue light absorber, a benzimidazolone-based blue light absorber, and an organic-inorganic composite blue light absorber.

[0016] The present invention provides an ultraviolet and blue light blocking glass. The ultraviolet and blue light blocking glass comprises a curved glass plate and an ultraviolet and blue light blocking coating. The ultraviolet and blue light blocking coating is disposed on at least one surface of the curved glass plate. The ultraviolet and blue light blocking coating contains silica, an ultraviolet absorber, and a blue light absorber. The ultraviolet and blue light blocking coating has a thickness of 2 μm to 12 μm. The ultraviolet and blue light blocking coating has a transmittance of 5% or less in the wavelength range of 300 nm to 400 nm, and the ultraviolet and blue light blocking coating has a maximum transmittance of less than 30% in the wavelength range of 400 nm to 440 nm.

[0017] Preferably, the ultraviolet and blue light blocking coating has a transmittance of 2% or less in the wavelength range of 300 nm to 400 nm, and the ultraviolet and blue light blocking coating has a maximum transmittance of 20% or less in the wavelength range of 400 nm to 440 nm.

[0018] Preferably, the ultraviolet and blue light blocking coating has a transmittance of 1% or less in the wavelength range of 300 nm to 400 nm, and the ultraviolet and blue light blocking coating has a maximum transmittance of 10% or less in the wavelength range of 400 nm to 440 nm.

[0019] Preferably, the transmittance T of the ultraviolet and blue light blocking coating at a wavelength of 460 nm 460 and transmittance T at a wavelength of 410 nm 410 The ratio is 4≦T 460 / T 410 Meets ≦60.

[0020] Preferably, the transmittance T of the ultraviolet and blue light blocking coating at a wavelength of 460 nm 460 and transmittance T at a wavelength of 410 nm 410 The ratio is 4≦T 460 / T 410 Satisfies ≦12.

[0021] Preferably, the curved glass plate has a transmittance of 70% or more within a wavelength range of 400 nm to 800 nm.

[0022] Preferably, the ultraviolet and blue light blocking coating has a transmittance of 70% or more within the wavelength range of 400 nm to 800 nm.

[0023] Preferably, the UV and blue light blocking coating has a transmittance of 70% within a wavelength range of 400 nm to 800 nm after undergoing a 3000-hour xenon lamp aging test, and the UV and blue light blocking coating has a haze difference of less than 2% after undergoing a 1000-rotation abrasion resistance test using a flat abrasion tester.

[0024] Preferably, the curved glass sheet is obtained by subjecting a flat glass sheet to a high temperature heat treatment at least at 560° C. and bending process.

[0025] The present invention provides an ultraviolet and blue light blocking laminated glass. The ultraviolet and blue light blocking laminated glass comprises an ultraviolet and blue light blocking glass sheet, an intermediate adhesive layer, and a second glass sheet. The intermediate adhesive layer is sandwiched between the ultraviolet and blue light blocking glass sheet and the second glass sheet. The ultraviolet and blue light blocking glass sheet comprises a curved glass sheet and an ultraviolet and blue light blocking coating. The ultraviolet and blue light blocking coating is disposed on at least one surface of the curved glass sheet. The ultraviolet and blue light blocking coating is located between the curved glass sheet and the intermediate adhesive layer.

[0026] The present invention provides a method for manufacturing an ultraviolet and blue light blocking glass, which includes the following steps:

[0027] Step 1: By mass %, 1% to 15% of an ultraviolet absorber, 1% to 15% of a blue light absorber, 40% to 60% of a second solvent, 0.01% to 1% of a second catalyst, and 10% to 30% of a second coupling agent are mixed and stirred under reflux to obtain a chelating agent.

[0028] Step 2: By mass%, 15% to 35% silicate, 30% to 60% first solvent, 5% to 15% first coupling agent, 0.01% to 1% first catalyst, and 10% to 30% deionized water are mixed and stirred to obtain a silica sol.

[0029] Step 3: Add 5% to 20% by mass of a chelating agent to each silica sol, mix and stir to obtain a UV and blue light blocking coating solution.

[0030] Step 4: The above ultraviolet and blue light blocking coating liquid is applied to at least one surface of the curved glass plate 1 and cured at 80 to 120°C to obtain an ultraviolet and blue light blocking glass having an ultraviolet and blue light blocking coating.

[0031] Preferably, in step 1, the mixture is refluxed and stirred at a temperature of 100 to 150° C. for 2 to 8 hours.

[0032] Preferably, in step 2, stirring is carried out for 60 to 120 minutes, in step 3, mixing and stirring is carried out for at least 120 minutes, and in step 4, the curing time at 80 to 120°C is preferably 10 to 200 minutes.

[0033] Preferably, the above step 4 further includes pre-drying the ultraviolet and blue light blocking coating liquid applied to the surface of the curved glass plate at a temperature of 20 to 60°C and a humidity of 45% to 65% for 20 to 40 minutes before curing at 80 to 120°C.

[0034] The present invention provides a UV- and blue-light blocking laminated glass capable of controlling light intensity or emitting light. The UV- and blue-light blocking laminated glass capable of controlling light intensity or emitting light comprises, in order, a first glass sheet, a first adhesive layer, a light control structure or light-emitting structure, a second adhesive layer, and a second glass sheet. An UV- and blue-light blocking coating is disposed between the first glass sheet and the light control structure or light-emitting structure and / or between the second glass sheet and the light control structure or light-emitting structure. The UV- and blue-light blocking coating comprises silica, a UV absorber, and a blue light absorber. The UV- and blue-light blocking coating has a transmittance of 5% or less in the wavelength range of 300 nm to 400 nm, and a maximum transmittance of less than 30% in the wavelength range of 400 nm to 440 nm.

[0035] Preferably, the ultraviolet and blue light blocking coating has a transmittance of 2% or less in the wavelength range of 300 nm to 400 nm, and the ultraviolet and blue light blocking coating has a maximum transmittance of 20% or less in the wavelength range of 400 nm to 440 nm.

[0036] Preferably, the ultraviolet and blue light blocking coating has a transmittance of 1% or less in the wavelength range of 300 nm to 400 nm, and the ultraviolet and blue light blocking coating has a maximum transmittance of 10% or less in the wavelength range of 400 nm to 440 nm.

[0037] Preferably, the transmittance T of the ultraviolet and blue light blocking coating at a wavelength of 460 nm 460 and transmittance T at a wavelength of 410 nm 410 The ratio is 4≦T 460 / T 410 Meets ≦60.

[0038] Preferably, the ultraviolet and blue light blocking coating has a transmittance of 70% or more within the wavelength range of 400 nm to 800 nm.

[0039] Preferably, the ultraviolet and blue light blocking coating has a haze difference of less than 2% before and after a 1000-rotation abrasion resistance test using a flat abrasion tester.

[0040] Preferably, the thickness of the ultraviolet and blue light blocking coating is 2 μm to 12 μm.

[0041] Preferably, the ultraviolet and blue light blocking coating has a transmittance of less than 70% within the wavelength range of 400 nm to 800 nm.

[0042] Preferably, the ultraviolet absorber has a maximum absorption peak within a wavelength range of 330 nm to 370 nm, and the blue light absorber has a maximum absorption peak within a wavelength range of 400 nm to 420 nm.

[0043] Preferably, the light control structure is used to adjust the visible light transmittance of an ultraviolet and blue light blocking laminated glass, and is a polymer dispersed liquid crystal (PDLC), a suspended particle device (SPD), or an electrochromic (EC) device. The light emitting structure can emit blue light or white light, and is an organic light emitting diode (OLED), an inorganic light emitting diode (LED), an inorganic thin film electroluminescence element (TFEL), or an organic thin film electroluminescence element (OTFEL).

[0044] Preferably, the ultraviolet and blue light blocking coating is disposed on the surface of the first glass sheet and is located between the first glass sheet and the first adhesive layer, or is disposed on the surface of the second glass sheet and is located between the second glass sheet and the second adhesive layer.

[0045] Preferably, the light control structure comprises a first carrier layer, a first planar electrode, a light control layer, a second planar electrode and a second carrier layer, which are stacked in sequence, and the ultraviolet and blue light blocking coating is disposed between the first glass plate and the first carrier layer and / or between the second glass plate and the second carrier layer.

[0046] More preferably, the ultraviolet and blue light blocking coating is disposed on the surface of the first carrier layer and located between the first carrier layer and the first adhesive layer, or is disposed on the surface of the second carrier layer and located between the second carrier layer and the second adhesive layer.

[0047] More preferably, the first planar electrode and the second planar electrode are both transparent conductive layers, and the transparent conductive layer includes a metal layer, a metal alloy layer, or a metal oxide layer, and the metal layer is made of gold (Au), silver (Ag), copper (Cu), aluminum (Al), or molybdenum (Mo), the metal alloy layer is a silver alloy, and the metal oxide layer is made of indium tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO), or antimony-doped tin oxide (ATO).

[0048] Preferably, at least one of the first glass sheet, the first adhesive layer, the second adhesive layer and the second glass sheet is body tinted.

[0049] More preferably, at least one of the first glass sheet and the second glass sheet is a tinted glass, and the tinted glass has a visible light transmittance of less than 70%.

[0050] More preferably, at least one of the first adhesive layer and the second adhesive layer is a colored adhesive layer, and the colored adhesive layer has a visible light transmittance of 44% or less.

[0051] The present invention adopts the above technical solutions, and therefore has the following beneficial effects:

[0052] The UV- and blue-light-blocking coating solution, UV- and blue-light-blocking glass, and manufacturing method thereof according to the present invention can reduce both UV transmittance and blue light transmittance, thereby simultaneously blocking both UV and blue light. The UV- and blue-light-blocking coating has excellent aging resistance and abrasion resistance, thereby extending the normal service life of the substrate. At the same time, the UV- and blue-light-blocking coating solution has the advantages of extremely low volatile organic compound (VOC) emissions, environmental friendliness, and ease of application. The UV- and blue-light-blocking coating also complies with the regulations for automotive glass. When the UV- and blue-light-blocking coating solution, UV- and blue-light-blocking glass, and manufacturing method thereof are applied to UV- and blue-light-blocking laminated glass with a light-controlling or light-emitting structure, they can not only block UV and blue light from outside the vehicle and extend the normal service life of the light-controlling or light-emitting structure, but also protect the light-controlling structure and block blue light from the light-emitting structure, thereby better protecting human eyes. They can also provide sun protection, privacy, and intelligent energy savings. [Brief explanation of the drawings]

[0053] [Figure 1] FIG. 1 is a schematic diagram showing the structure of the ultraviolet and blue light blocking glass according to the present invention. [Figure 2] FIG. 2 is a schematic diagram showing the structure of the ultraviolet and blue light blocking laminated glass according to the present invention. [Figure 3] FIG. 3 is a schematic diagram showing a first structure of an ultraviolet and blue light blocking laminated glass having a light control structure according to the present invention. [Figure 4] FIG. 4 is a schematic diagram showing a second structure of the ultraviolet and blue light blocking laminated glass having a light control structure according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0054] The present invention will be further described below with reference to the drawings.

[0055] The ultraviolet and blue light blocking coating solution according to the present invention is used to form an ultraviolet and blue light blocking coating on the surface of a substrate. The ultraviolet and blue light blocking coating can absorb ultraviolet and blue light to reduce the ultraviolet transmittance and blue light transmittance. The ultraviolet and blue light blocking coating solution contains silica sol and a chelating agent, and 5% to 20% by mass of the chelating agent is added to each silica sol. That is, the mass percentage of the chelating agent relative to the silica sol is in the range of 5% to 20%. .

[0056] The silica sol contains, in mass %, 15% to 35% silicate, 30% to 60% first solvent, 5% to 15% first coupling agent, 0.01% to 1% first catalyst, and 10% to 30% deionized water. The silica sol can be obtained by mixing and stirring 15% to 35% silicate, 30% to 60% first solvent, 5% to 15% first coupling agent, 0.01% to 1% first catalyst, and 10% to 30% deionized water.

[0057] The chelating agent contains, by mass, 1% to 15% of an ultraviolet absorber, 1% to 15% of a blue light absorber, 40% to 60% of a second solvent, 0.01% to 1% of a second catalyst, and 10% to 30% of a second coupling agent. The chelating agent can be obtained by mixing and stirring 1% to 15% of the ultraviolet absorber, 1% to 15% of the blue light absorber, 40% to 60% of a second solvent, 0.01% to 1% of a second catalyst, and 10% to 30% of a second coupling agent.

[0058] By adding a blue light absorber, the UV and blue light blocking coating solution can reduce both UV transmittance and blue light transmittance, resulting in a UV and blue light blocking coating that can simultaneously block both UV and blue light. Furthermore, the UV and blue light blocking coating also has excellent aging resistance and abrasion resistance, extending the normal service life of the substrate on which the UV and blue light blocking coating is applied. At the same time, the UV and blue light blocking coating solution has the advantages of extremely low volatile organic compound (VOC) emissions, being environmentally friendly, and being easy to apply. The UV and blue light blocking coating also complies with the regulations for automotive glass.

[0059] In the present invention, the silicate is selected from at least one of tetramethyl orthosilicate, tetraethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane.

[0060] Both the first coupling agent and the second coupling agent are silane coupling agents, and are selected from at least one of 3-aminopropyltrimethoxysilane (KH540), 3-aminopropyltriethoxysilane (KH550), [3-(2,3-epoxypropoxy)-propyl]-trimethoxysilane (KH560), γ-methacryloxypropyltrimethoxysilane (KH570), and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane (KH792). Note that the first coupling agent and the second coupling agent may be the same silane coupling agent or different silane coupling agents.

[0061] In consideration of coating uniformity and usage effect, it is preferred that the first solvent is at least one of methanol, ethanol, propanol, isopropanol, butanol, and propylene glycol methyl ether, and the second solvent is at least one of butyl acetate, propylene glycol methyl ether, isobutyl acetate, and xylene.

[0062] In addition, in consideration of the coating formation time and the effect of use, it is preferable that the first catalyst is at least one of hydrochloric acid, nitric acid, and ammonia solution, and the second catalyst is at least one of dibutyltin dilaurate (DY-12), organobismuth catalyst (DY-20), and tin(II) bis(2-ethylhexanoate).

[0063] The ultraviolet absorber has a maximum absorption peak in the wavelength range of 330 nm to 370 nm. The ultraviolet absorber is preferably selected from at least one of a benzophenone-based ultraviolet absorber, a benzimidazole-based ultraviolet absorber, and a triazine-based ultraviolet absorber. In consideration of coating uniformity and use effects, the hydroxyl group content in the ultraviolet absorber is preferably 5% by mass or more.

[0064] Specific examples of the benzophenone-based ultraviolet absorber include 2,4-dihydroxybenzophenone, 2,2',3 (or 4, 5, or 6)-trihydroxybenzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2,4-dihydroxy-2',4'-dimethoxybenzophenone, and 2-hydroxy-4-(octyloxy)benzophenone.

[0065] Specific examples of the benzimidazole-based ultraviolet absorber include 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol (ultraviolet absorber, trade name UV-234), 2-[5-chloro(2H)-benzotriazol-2-yl]-4-methyl-6-(tert-butyl)phenol (i.e., 2-(5-chloro-2H-benzotriazol-2-yl)-4-methyl-6-(tert-butyl)phenol), octyl-3-[3-tert-butyl-4 -hydroxy-5-[5-chloro-2H-benzotriazol-2-yl]propionate (i.e., octyl-3-[3-tert-butyl-4-hydroxy-5-[5-chloro-2H-benzotriazol-2-yl]propionate), 2-(2H-benzotriazol-2-yl)-4,6-di-tert-pentylphenol, 2-(2′-hydroxy-5′-methylphenyl)benzotriazole, 2-[2-hydroxy-3-(3,4,5,6-tetrahydrophthalimide-methyl)-5-methylphenyl]benzotriazole (i.e., 2-[2-hydroxy-3-(3,4,5,6-tetrahydrophthalimide-methyl)-5-methylphenyl]benzotriazole), 2-(2-hydroxy-5-tert-octylphenyl)-2H benzotriazole, 2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole (i.e., 2-(2-hydroxy-5-tert-butylphenyl)-2H-benzotriazole), methyl 3-(3-(2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyphenyl)propionate (i.e., methyl 3-(3-(2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyphenyl)propionate), 2-(2H-benzotriazol-2-yl)-4,6-bis(1-methyl-1-phenylethyl)phenol, 2-(2H-benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol, and the like can be mentioned.

[0066] Specific examples of the triazine-based ultraviolet absorber include 2-[4-[(2-hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine (i.e., 2-[4-[(2-hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine), 2-[4-[(2-hydroxy-3-(2'-ethyl)hexyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine (i.e., 2-[4-[(2-hydroxy-3-(2'-ethyl)hexyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dime 2,4-bis(2-hydroxy-4-butoxyphenyl)-6-(2,4-bis-butoxyphenyl)-1,3,5-triazine (i.e., 2,4-bis(2-hydroxy-4-butoxyphenyl)-6-(2,4-bis-butoxyphenyl)-1,3,5-triazine), 2-(2-hydroxy-4-[1-octylcarbonylethoxy]phenyl)-4,6-bis(4-phenylphenyl)-1,3,5-triazine (i.e., 2-(2-hydroxy-4-[1-octylcarbonylethoxy]phenyl)-4,6-bis(4-phenylphenyl)-1,3,5-triazine), and TINUVIN477 (trade name, manufactured by Ciba Japan Co., Ltd.) can be given.

[0067] The organic ultraviolet absorbers can absorb ultraviolet rays in a wide wavelength range. In the present invention, these ultraviolet absorbers can be used alone or in combination of two or more, and the specific use conditions can be determined according to actual needs.

[0068] The blue light absorber has a maximum absorption peak in the wavelength range of 400 nm to 420 nm. The blue light absorber is preferably selected from at least one of an azo-based blue light absorber, an isoindolinone-based blue light absorber, a quinophthalone-based blue light absorber, a benzimidazolone-based blue light absorber, and an organic-inorganic composite blue light absorber. In consideration of coating uniformity and usage effects, the hydroxyl group content in the blue light absorber is preferably 5% by mass or more.

[0069] Specific examples of the azo-based blue light absorbing agent include azophenyl methacrylate, 2-[(4-methyl-2-nitrophenyl)azo]-3-oxo-N-phenylbutanamide, 2-[(4-chloro-2-nitrophenyl)azo]-N-(2-chlorophenyl)-3-oxobutanamide, Jadewin 1226 (trade name, manufactured by Qingdao Jadewin New Materials Technology Co., Ltd.), and 2'-(3,3'-dichloro-1,1'-biphenyl-4,4'-bisazo)bis[N-(4-chloro-2,5-dimethoxyphenyl)-3-oxobutyramide].

[0070] Specific examples of the isoindolinone-based blue light absorber include 1,3,3-trimethyl-2-methyleneindoline, 3,3′-[(2-methyl-1,3-phenylene)diimino]bis[4,5,6,7-tetrachloro-1H-isoindol-1-one], hexachloroisoindolinone, 2-[[3,3′-dichloro-4′-[[1-[[(2,4-dimethylphenyl)amino]carbonyl]-2-oxopropyl]azo]-1,1′-biphenyl-4-yl]azo]-N-(2-methylphenyl)-3-oxobutanamide, and the like.

[0071] Specific examples of the quinophthalone-based blue light absorber include 3-(2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl)propenal (i.e., 3-(2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl)propenal), 2-(3-hydroxy-1-oxo-4,5,6,7-tetrachloro-2-indenyl)-8-(3,4,5,6-tetrachlorophthalimide)quinoline (i.e., Pigment Yellow 138), and the like.

[0072] Specific examples of the benzimidazolone-based blue light absorber include 2-(2-hydroxy-5-isoacrylate ethylphenyl)-2H-benzotriazole, 5-[1-[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl] -2-oxopropyl]azo]-1,4-dimethyl terephthalate (i.e., 5-[[1-[[(2,3-dihydro-2-oxo-1H-benzimidazol-5-yl)amino]carbonyl] -2-oxopropyl]azo]-1,4-dimethyl terephthalate ), 2-[[1-[[[(2,3-dihydro-2-oxo-1H-benzimidazol)-5-yl]amino]carbonyl]-2-oxopropyl]azo]-1,4-benzenedicarboxylate dimethyl, Jiedeying 1227 (trade name, manufactured by Qingdao Jiedeying New Materials Technology Co., Ltd.), and the like can be mentioned.

[0073] Specific examples of the organic-inorganic composite blue light absorbing agent include U400 (trade name, manufactured by Shanghai Luozheng Nanotechnology Co., Ltd.), U410 (trade name, manufactured by Shanghai Luozheng Nanotechnology Co., Ltd.), U420 (trade name, manufactured by Shanghai Luozheng Nanotechnology Co., Ltd.), and U460 (trade name, manufactured by Shanghai Luozheng Nanotechnology Co., Ltd.).

[0074] As shown in FIG. 1, the present invention provides an ultraviolet and blue light blocking glass. The ultraviolet and blue light blocking glass comprises a curved glass plate 1 and an ultraviolet and blue light blocking coating 2. The ultraviolet and blue light blocking coating 2 is formed by applying the ultraviolet and blue light blocking coating liquid to at least one surface of the curved glass plate 1 and curing it. The ultraviolet and blue light blocking coating 2 contains silica, an ultraviolet absorber, and a blue light absorber. To be suitable for automotive glass, the ultraviolet and blue light blocking coating 2 has a thickness of 2 μm to 12 μm. The ultraviolet and blue light blocking coating 2 has a transmittance of 5% or less, preferably 2% or less, more preferably 1% or less, and most preferably 0.5% or less, within a wavelength range of 300 nm to 400 nm. The ultraviolet and blue light blocking coating 2 has a maximum transmittance of 30% or less, preferably 20% or less, more preferably 10% or less, and most preferably 5% or less, within a wavelength range of 400 nm to 440 nm. The UV and blue light blocking glass can block both UV and blue light at the same time.

[0075] To reduce the yellowish appearance of UV- and blue-light blocking coating 2, the transmittance T 460 and transmittance T at a wavelength of 410 nm 410 The ratio is 4≦T 460 / T 410 It is preferable that the transmittance satisfies ≦60, thereby achieving a good appearance and being applicable to more scenarios. When the curved glass sheet 1 is transparent glass, the transmittance of the curved glass sheet 1 in the wavelength range of 400 to 800 nm is 70% or more. The transmittance T of the UV / blue light blocking coating 2 at a wavelength of 460 nm is 460 and transmittance T at a wavelength of 410 nm 410 The ratio is 4≦T 460 / T 410It is preferable that the transmittance satisfies the following condition: ≦12. The ultraviolet and blue light blocking coating 2 has a transmittance of 70% or more, preferably 80% or more, and more preferably 85% or more, within a wavelength range of 400 to 800 nm. Furthermore, the curved glass plate 1 preferably has a transmittance of 80% or more within a wavelength range of 400 to 800 nm.

[0076] To meet the requirements for use in automotive glass, the ultraviolet and blue light blocking coating 2 preferably has a transmittance of 70% or more within a wavelength range of 400 nm to 800 nm after undergoing a 3000-hour xenon lamp aging test, and the ultraviolet and blue light blocking coating 2 has a haze difference of less than 2% after undergoing a 1000-rotation abrasion resistance test using a flat abrasion tester.

[0077] The curved glass sheet 1 is physically tempered glass, and is obtained by subjecting a flat glass sheet to a high-temperature heat treatment at least at 560°C and a bending process. The above-mentioned UV and blue light blocking glass can be used as side window glass and rear window glass of an automobile.

[0078] The present invention further provides a method for manufacturing an ultraviolet and blue light blocking glass, which includes the following steps:

[0079] Step 1: By mass %, 1% to 15% of an ultraviolet absorber, 1% to 15% of a blue light absorber, 40% to 60% of a second solvent, 0.01% to 1% of a second catalyst, and 10% to 30% of a second coupling agent are mixed and refluxed in a thermostatic oil bath at 100°C with stirring to obtain a chelating agent.

[0080] To ensure that the reaction proceeds sufficiently, the mixture is preferably refluxed and stirred at a temperature of 100 to 150° C. for 2 to 8 hours.

[0081] Step 2: By mass%, 15% to 35% silicate, 30% to 60% first solvent, 5% to 15% first coupling agent, 0.01% to 1% first catalyst, and 10% to 30% deionized water are mixed and stirred in a water bath at 40°C to obtain a silica sol.

[0082] To ensure that the reaction proceeds sufficiently, it is preferable to stir for 60 to 120 minutes.

[0083] Step 3: Add 5% to 20% by mass of a chelating agent to each silica sol, mix and stir to obtain a UV and blue light blocking coating solution.

[0084] To ensure that the reaction proceeds sufficiently, it is preferable to mix and stir for at least 120 minutes.

[0085] Step 4: The above ultraviolet and blue light blocking coating liquid is applied to at least one surface of the curved glass plate 1 and cured at 80 to 120°C to obtain an ultraviolet and blue light blocking glass having an ultraviolet and blue light blocking coating.

[0086] The curved glass plate 1 has a convex surface and a concave surface. When the curved glass plate 1 is installed in an automobile, the convex surface faces the exterior of the automobile and the concave surface faces the interior of the automobile. It is preferable to apply the ultraviolet and blue light blocking coating liquid to the concave surface.

[0087] The curing time at 80 to 120°C is preferably 10 to 200 minutes.

[0088] Before curing at 80-120°C, step 4 further includes pre-drying the UV and blue light blocking coating solution applied to the surface of the curved glass plate 1 at a temperature of 20-60°C and a humidity of 45%-65% for 20-40 minutes, which is useful for subsequent curing.

[0089] To apply the ultraviolet and blue light blocking coating liquid to at least one surface of the curved glass plate 1, a curved surface coating technique such as spray coating, wipe coating, flow coating, brush coating, or dip coating can be used, as well as a composite coating method that combines techniques such as ultrasonic, centrifugal, or spin coating.

[0090] As shown in Figure 2, the present invention provides an ultraviolet and blue light blocking laminated glass. The ultraviolet and blue light blocking laminated glass comprises the ultraviolet and blue light blocking glass 10, an intermediate adhesive layer 20, and a second glass sheet 30. The intermediate adhesive layer 20 is sandwiched between the ultraviolet and blue light blocking glass 10 and the second glass sheet 30. The ultraviolet and blue light blocking glass 10 comprises a curved glass sheet 1 and an ultraviolet and blue light blocking coating 2, with the ultraviolet and blue light blocking coating 2 disposed on at least one surface of the curved glass sheet 1.

[0091] The UV- and blue-light-blocking laminated glass can be used as a windshield, side window, sunroof, or rear window of an automobile. Preferably, after the UV- and blue-light-blocking laminated glass is installed in an automobile, the UV- and blue-light-blocking glass 10 is the outer glass sheet, i.e., the UV- and blue-light-blocking glass 10 is located on the outside of the automobile, and the UV- and blue-light-blocking coating 2 is located between the curved glass sheet 1 and the intermediate adhesive layer 20. This reduces UV exposure to the intermediate adhesive layer 20, slows down the rate of UV-induced aging of the intermediate adhesive layer 20, and extends the normal service life of the UV- and blue-light-blocking laminated glass.

[0092] As shown in Figures 3 and 4, the present invention provides UV- and blue-light-blocking laminated glass, which can be used as a dimmable sunroof glass for automobiles. The UV- and blue-light-blocking laminated glass includes a UV- and blue-light-blocking coating 2, and sequentially stacked layers: a first glass sheet 11, a first adhesive layer 12, a first carrier layer 13, a first planar electrode 14, a photochromic layer 15, a second planar electrode 16, a second carrier layer 17, a second adhesive layer 18, and a second glass sheet 19. The UV- and blue-light-blocking coating 2 is disposed between the first glass sheet 11 and the first carrier layer 13 and / or between the second glass sheet 19 and the second carrier layer 17. The UV- and blue-light-blocking coating 2 significantly reduces UV and blue light entering the vehicle interior, protecting items inside and human eyes. The UV- and blue-light-blocking coating 2 can also be used to protect a photochromic layer 15, particularly a polymer-dispersed liquid crystal (PDLC) layer.

[0093] In FIG. 3 , the UV- and blue-light-blocking coating 2 is disposed on the surface of the first glass sheet 11 and is located between the first glass sheet 11 and the first adhesive layer 12. The UV- and blue-light-blocking coating 2 is further used to protect the first adhesive layer 12 from excessive UV radiation, thereby extending the normal service life of the UV- and blue-light-blocking laminated glass. Alternatively, the UV- and blue-light-blocking coating 2 may be disposed on the surface of the second glass sheet 19 and located between the second glass sheet 19 and the second adhesive layer 18. The first glass sheet 11 is preferably an exterior glass sheet, i.e., located on the exterior of the automobile. The UV- and blue-light-blocking coating 2 is used to block UV and blue light from outside the vehicle.

[0094] 4, the ultraviolet and blue light blocking coating 2 is disposed on the surface of the first carrier layer 13 and is located between the first carrier layer 13 and the first adhesive layer 12. The ultraviolet and blue light blocking coating 2 is used to block ultraviolet and blue light outside the vehicle so as to protect the interior items, human eyes, and the photochromic layer 15. Alternatively, the ultraviolet and blue light blocking coating 2 may be disposed on the surface of the second carrier layer 17 and is located between the second carrier layer 17 and the second adhesive layer 18.

[0095] The light control layer 15 is used to adjust the visible light transmittance of the UV and blue light blocking laminated glass, and this adjustment is achieved by applying a voltage to the first planar electrode 14 and the second planar electrode 16. The light control layer 15 can be a polymer dispersed liquid crystal (PDLC), a suspended particle device (SPD), or an electrochromic (EC) device, so that the UV and blue light blocking laminated glass can meet the needs of sun protection, privacy protection, and intelligent energy saving, etc.

[0096] The first planar electrode 14 and the second planar electrode 16 are both transparent conductive layers, and may specifically include a metal layer, a metal alloy layer, or a metal oxide layer. Examples of the metal layer include gold (Au), silver (Ag), copper (Cu), aluminum (Al), and molybdenum (Mo). Examples of the metal alloy layer include silver alloys such as silver-copper alloys and silver-indium alloys. Examples of the metal oxide layer include indium tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO), and antimony-doped tin oxide (ATO).

[0097] In the present invention, a first carrier layer 13, a first planar electrode 14, a light control layer 15, a second planar electrode 16, and a second carrier layer 17 are pre-laminated to form a light control structure. Typically, polyethylene terephthalate (PET) is used for the first carrier layer 13 and the second carrier layer 17, but polyvinyl chloride (PVC), polyvinyl butyral (PVB), ethylene-vinyl acetate copolymer (EVA), polyacrylate (PA), polyurethane (PUR), etc. may also be used. A first adhesive layer 12 and a second adhesive layer 18 are used to bond the light control structure between a first glass sheet 11 and a second glass sheet 19, thereby forming a laminated glass. Typically, the first adhesive layer 12 and the second adhesive layer 18 are made of polyvinyl butyral (PVB), although other materials such as ionic interlayer (SGP), polyvinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), polyacrylate (PA), or polyurethane (PUR) may also be used. Preferably, the first adhesive layer 12 and the second adhesive layer 18 can also absorb ultraviolet light, thereby reducing the intensity of ultraviolet light entering the vehicle interior. At the same time, because the photochromic performance of the photochromic layer 15, particularly the PDLC, is sensitive to ultraviolet light, the first adhesive layer 12 and the second adhesive layer 18, which can absorb ultraviolet light, are also used to protect the photochromic layer 15, particularly the PDLC.

[0098] In the present invention, the light-control structure located between the first adhesive layer 12 and the second adhesive layer 18 can be replaced with a light-emitting structure. The light-emitting structure can emit blue or white light, and examples of the light-emitting structure include organic light-emitting diodes (OLEDs), inorganic light-emitting diodes (LEDs), inorganic thin-film electroluminescent elements (TFELs), and organic thin-film electroluminescent elements (OTFELs). The ultraviolet and blue light blocking coating 2 is disposed on the surface of the first glass sheet 11 and is disposed between the first glass sheet 11 and the first adhesive layer 12. The ultraviolet and blue light blocking coating 2 also serves to reduce harmful blue light from the light-emitting structure. Alternatively, the ultraviolet and blue light blocking coating 2 may be disposed on the surface of the second glass sheet 19 and is disposed between the second glass sheet 19 and the second adhesive layer 18. The second glass sheet 19 is preferably an inner glass sheet, i.e., located inside the automobile. The ultraviolet and blue light blocking coating 2 is used to block ultraviolet and blue light from outside the vehicle and blue light from the light emitting structure, thereby better protecting human eyes.

[0099] At least one of the first glass sheet 11, the first adhesive layer 12, the second adhesive layer 18, and the second glass sheet 19 is body-tinted and has a low visible light transmittance. At least one of the first glass sheet 11 and the second glass sheet 19 is tinted glass, and the visible light transmittance of the tinted glass can be less than 70%, 41% or less, 30% or less, or 26% or less. Examples of tinted glass include green glass and gray glass. At least one of the first adhesive layer 12 and the second adhesive layer 18 is a tinted adhesive layer, and the visible light transmittance of the tinted adhesive layer can be 44% or less, 18% or less, 8% or less, 5% or less, or 2% or less. Examples of tinted adhesive layers include different types of gray PVB. This provides privacy protection, eliminates the need for a sunshade when used as sunroof glass, and reduces product costs and improves interior space. [Example]

[0100] The present invention will be further explained below with reference to examples, but the present invention is not limited to the following examples.

[0101] Example 1

[0102] 10 g of BP-2 ultraviolet absorber, 10 g of U410 blue light absorber, 55 g of butyl acetate solvent, 0.15 g of dibutyltin dilaurate catalyst, and 25 g of γ-methacryloxypropyltrimethoxysilane are mixed, refluxed and stirred in a thermostatic oil bath at 100°C for 4 hours, and then allowed to cool to room temperature to obtain chelating agent U1.

[0103] 13.56 g of tetraethyl orthosilicate, 20 g of absolute ethanol, 30 g of isopropanol, 5.18 g of γ-methacryloxypropyltrimethoxysilane, 0.1 g of nitric acid with a mass fraction of 10%, and 12.5 g of deionized water are stirred in a water bath at 40°C for 60 minutes to obtain silica sol A1.

[0104] 15 g of silica sol A1 and 1 g of chelating agent U1 are weighed and mixed and stirred for 120 minutes to obtain ultraviolet and blue light blocking coating solution B1.

[0105] In a dust-free environment, an appropriate amount of UV and blue light blocking coating liquid B1 is weighed out and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, the UV and blue light blocking coating liquid B1 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain UV and blue light blocking glass C1 with a UV and blue light blocking coating.

[0106] <Example 2>

[0107] 10 g of BP-2 ultraviolet absorber, 10 g of U420 blue light absorber, 55 g of butyl acetate solvent, 0.15 g of dibutyltin dilaurate catalyst, and 25 g of γ-methacryloxypropyltrimethoxysilane are mixed, refluxed and stirred in a thermostatic oil bath at 100°C for 4 hours, and then allowed to cool to room temperature to obtain chelating agent U2.

[0108] 13.56 g of tetraethyl orthosilicate, 22 g of absolute ethanol, 28 g of isopropanol, 5.18 g of γ-methacryloxypropyltrimethoxysilane, 0.1 g of nitric acid with a mass fraction of 10%, and 12.5 g of deionized water are stirred in a water bath at 40° C. for 70 minutes to obtain silica sol A2.

[0109] 20 g of silica sol A2 and 1.5 g of chelating agent U2 are weighed and mixed and stirred for 120 minutes to obtain ultraviolet and blue light blocking coating solution B2.

[0110] In a dust-free environment, an appropriate amount of UV and blue light blocking coating liquid B2 is weighed out and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, the UV and blue light blocking coating liquid B2 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain UV and blue light blocking glass C2 with a UV and blue light blocking coating.

[0111] Example 3

[0112] Mix 10 g of BP-2 ultraviolet absorber, 10 g of Jie De Ying 1226 blue light absorber, 55 g of butyl acetate solvent, 0.15 g of dibutyltin dilaurate catalyst, and 25 g of γ-methacryloxypropyltrimethoxysilane, reflux and stir in a thermostatic oil bath at 100°C for 4 hours, and then allow to cool to room temperature to obtain chelating agent U3.

[0113] 13.56 g of tetraethyl orthosilicate, 25 g of absolute ethanol, 28 g of isopropanol, 5.18 g of γ-methacryloxypropyltrimethoxysilane, 0.1 g of nitric acid with a mass fraction of 10%, and 12.5 g of deionized water are stirred in a water bath at 40°C for 80 minutes to obtain silica sol A3.

[0114] 20 g of silica sol A3 and 1.3 g of chelating agent U3 were weighed and mixed with stirring for 120 minutes to obtain ultraviolet and blue light blocking coating solution B3.

[0115] In a dust-free environment, an appropriate amount of UV and blue light blocking coating liquid B3 is weighed out and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, the UV and blue light blocking coating liquid B3 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain UV and blue light blocking glass C3 with a UV and blue light blocking coating.

[0116] Example 4

[0117] 10 g of silica sol A1 and 1 g of chelating agent U1 are weighed and mixed and stirred for 120 minutes to obtain ultraviolet and blue light blocking coating solution B4.

[0118] In a dust-free environment, an appropriate amount of UV and blue light blocking coating liquid B4 is weighed out and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, the UV and blue light blocking coating liquid B4 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain UV and blue light blocking glass C4 with a UV and blue light blocking coating.

[0119] <Example 5>

[0120] 10 g of silica sol A1 and 1.5 g of chelating agent U1 are weighed and mixed and stirred for 120 minutes to obtain ultraviolet and blue light blocking coating solution B5.

[0121] In a dust-free environment, an appropriate amount of UV and blue light blocking coating liquid B5 is weighed out and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, the UV and blue light blocking coating liquid B5 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain UV and blue light blocking glass C5 with a UV and blue light blocking coating.

[0122] <Comparative Example 1>

[0123] In a dust-free environment, an appropriate amount of silica sol A1 is weighed and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, silica sol A1 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain comparative glass D1.

[0124] <Comparative Example 2>

[0125] 10 g of silica sol A1 and 3 g of chelating agent U1 are weighed and mixed with stirring for 120 minutes to obtain ultraviolet and blue light blocking coating solution B6.

[0126] In a dust-free environment, an appropriate amount of UV and blue light blocking coating liquid B6 is weighed out and applied with a bar coater to the surface of curved glass plate 1. After leaving it to stand and leveling, the UV and blue light blocking coating liquid B6 is pre-dried with an infrared lamp and cured at 110°C for 55 minutes to obtain UV and blue light blocking glass D2 with a UV and blue light blocking coating.

[0127] [evaluation] The glass samples obtained from Examples 1 to 5 and Comparative Examples 1 and 2 were evaluated by the following tests, and the evaluation results are shown in Table 1.

[0128] Transmittance: The transmission spectrum in the wavelength range of 250 to 2550 nm is measured using a spectrophotometer. According to ISO 13837, the ultraviolet transmittance in the wavelength range of 300 to 400 nm and the visible light transmittance in the wavelength range of 400 to 800 nm are calculated, and the maximum blue light transmittance in the wavelength range of 400 to 440 nm is obtained based on the transmission spectrum. The transmittance in this invention refers to the average value obtained by measuring five different points on the same glass sample.

[0129] Coating thickness: The coating thickness is measured by a step gauge.

[0130] Aging resistance: The aging resistance test method is as follows: The sample is placed in a xenon weathering tester (product number CI4000 USA) equipped with a calibrated lamp tube, and the rain cycle is a combination of 102 minutes of dryness and 18 minutes of rain, and the radiation intensity is 60±2 w / m in the wavelength range of 300-400 nm. 2 The aging resistance test is carried out for 3000 hours, with the black panel temperature at 65±3°C and the relative humidity at 50±10%. After the aging resistance test, the appearance of the coating of the sample is observed to see if any cracks have appeared.

[0131] Abrasion resistance: Abrasion resistance is measured by a flat abrasion tester. The glass sample is placed on the tester with the coating facing up and subjected to an abrasion resistance test of 1000 revolutions.

[0132] Haze: A haze meter is used to test the sample after it has undergone the abrasion resistance test. A test is performed on an area that has not undergone the abrasion resistance test to obtain Haze1. The sample is then moved and a test is performed on the area that has undergone the abrasion resistance test to obtain Haze2. The difference in haze before and after the test is |Haze2 - Haze1|.

[0133] [Table 1]

[0134] The following is clear from Table 1:

[0135] In Comparative Example 1, a silica sol coating was formed on a curved glass plate. The silica sol coating met the requirements for aging resistance and abrasion resistance, but did not have the ability to block ultraviolet and blue light.

[0136] In Comparative Example 2, a UV and blue light blocking coating was formed on a curved glass plate, but an excess amount of chelating agent (e.g., 30%) was added to each silica sol. This UV and blue light blocking coating met the requirements for UV transmittance and maximum blue light transmittance while keeping them very low, but did not meet the requirements for abrasion resistance. Therefore, glass with this UV and blue light blocking coating cannot be used as automotive glass.

[0137] In Examples 1 to 3, a UV and blue light blocking coating was formed on a curved glass plate, and an appropriate amount of chelating agent was added to each silica sol, so that the UV and blue light blocking coating met the requirements for UV transmittance, maximum blue light transmittance, and visible light transmittance, and also met the requirements for aging resistance and abrasion resistance.

[0138] In Examples 4 to 5, a UV and blue light blocking coating was formed on a curved glass sheet, and an appropriate amount of chelating agent was added to each silica sol. This differs from Examples 1 to 3 in that a larger amount of chelating agent was added. The UV and blue light blocking coatings in Examples 4 to 5 met the requirements for UV transmittance, aging resistance, and abrasion resistance. Compared to Examples 1 to 3, the maximum blue light transmittance was lower, but the visible light transmittance was less than 70%. Therefore, the glass in Examples 4 to 5 can be used in automotive parts that do not require a visible light transmittance or that require a visible light transmittance of less than 70%, such as sunroof glass, particularly sunroof glass without a sunshade, dimmable sunroof glass, and luminous sunroof glass.

[0139] The above has specifically described the UV and blue light blocking coating solution, the UV and blue light blocking glass and its manufacturing method, and the UV and blue light blocking laminated glass capable of controlling light or emitting light according to the present invention. However, the present invention is not limited to the above specific embodiments, and any improvements, equivalent modifications, and substitutions made based on the technical gist of the present invention are all within the scope of protection of the present invention.

Claims

1. An ultraviolet and blue light blocking coating liquid used to form an ultraviolet and blue light blocking coating on a surface of a substrate, the ultraviolet and blue light blocking coating liquid comprising silica sol and a chelating agent; The silica sol contains, in mass %, 15% to 35% of a silicate, 30% to 60% of a first solvent, 5% to 15% of a first coupling agent, 0.01% to 1% of a first catalyst, and 10% to 30% of deionized water; The chelating agent contains, in mass %, 1% to 15% of an ultraviolet absorber, 1% to 15% of a blue light absorber, 40% to 60% of a second solvent, 0.01% to 1% of a second catalyst, and 10% to 30% of a second coupling agent; the ultraviolet absorber has a maximum absorption peak in a wavelength range of 330 nm to 370 nm, and the blue light absorber has a maximum absorption peak in a wavelength range of 400 nm to 420 nm; The ultraviolet and blue light blocking coating solution is characterized by:

2. The chelating agent is added in an amount of 5% to 20% by mass per silica sol.

2. The ultraviolet and blue light blocking coating solution according to claim 1.

3. The silicate is selected from at least one of tetramethyl orthosilicate, tetraethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane.

2. The ultraviolet and blue light blocking coating solution according to claim 1.

4. The first coupling agent and the second coupling agent are both selected from at least one of 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, [3-(2,3-epoxypropoxy)-propyl]-trimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-(2-aminoethyl)-3-aminopropyltrimethoxysilane; 2. The ultraviolet and blue light blocking coating solution according to claim 1.

5. the first solvent is at least one of methanol, ethanol, propanol, isopropanol, butanol, and propylene glycol methyl ether, and the second solvent is at least one of butyl acetate, propylene glycol methyl ether, isobutyl acetate, and xylene; 2. The ultraviolet and blue light blocking coating solution according to claim 1.

6. the first catalyst is at least one of hydrochloric acid, nitric acid, and ammonia solution, and the second catalyst is at least one of dibutyltin dilaurate, an organobismuth catalyst, and tin(II) bis(2-ethylhexanoate); 2. The ultraviolet and blue light blocking coating solution according to claim 1.

7. the hydroxyl group content in the ultraviolet absorber is 5% by mass or more, and the ultraviolet absorber is selected from at least one of a benzophenone-based ultraviolet absorber, a benzimidazole-based ultraviolet absorber, and a triazine-based ultraviolet absorber; 2. The ultraviolet and blue light blocking coating solution according to claim 1.

8. The hydroxyl group content in the blue light absorber is 5% by mass or more, and the blue light absorber is selected from at least one of an azo-based blue light absorber, an isoindolinone-based blue light absorber, a quinophthalone-based blue light absorber, a benzimidazolone-based blue light absorber, and an organic-inorganic composite blue light absorber.

2. The ultraviolet and blue light blocking coating solution according to claim 1.

9. An ultraviolet and blue light blocking laminated glass comprising an ultraviolet and blue light blocking glass sheet, an intermediate adhesive layer, and a second glass sheet, the intermediate adhesive layer being sandwiched between the ultraviolet and blue light blocking glass sheet and the second glass sheet, the ultraviolet and blue light blocking glass sheet comprising a curved glass sheet and an ultraviolet and blue light blocking coating, the ultraviolet and blue light blocking coating being disposed on at least one surface of the curved glass sheet, the ultraviolet and blue light blocking coating being located between the curved glass sheet and the intermediate adhesive layer, and the ultraviolet and blue light blocking coating being disposed on at least one surface of the curved glass sheet. the coating contains silica, an ultraviolet absorber, and a blue light absorber, the ultraviolet and blue light blocking coating having a thickness of 2 μm to 12 μm, the ultraviolet and blue light blocking coating having a transmittance of 5% or less in a wavelength range of 300 nm to 400 nm, the ultraviolet and blue light blocking coating having a maximum transmittance of less than 30% in a wavelength range of 400 nm to 440 nm, the ultraviolet absorber having a maximum absorption peak in a wavelength range of 330 nm to 370 nm, and the blue light absorber having a maximum absorption peak in a wavelength range of 400 nm to 420 nm. The ultraviolet and blue light blocking laminated glass is characterized by the above.

10. the transmittance of the ultraviolet and blue light blocking coating within a wavelength range of 300 nm to 400 nm is 2% or less, and the maximum transmittance of the ultraviolet and blue light blocking coating within a wavelength range of 400 nm to 440 nm is 20% or less; 10. The ultraviolet and blue light blocking laminated glass according to claim 9.

11. the transmittance of the ultraviolet and blue light blocking coating within a wavelength range of 300 nm to 400 nm is 1% or less, and the maximum transmittance of the ultraviolet and blue light blocking coating within a wavelength range of 400 nm to 440 nm is 10% or less; 10. The ultraviolet and blue light blocking laminated glass according to claim 9.

12. The transmittance T of the ultraviolet and blue light blocking coating at a wavelength of 460 nm ４６０ and transmittance T at a wavelength of 410 nm ４１０ The ratio to 4≦T ４６０ / T ４１０ Satisfying ≦60, 10. The ultraviolet and blue light blocking laminated glass according to claim 9.

13. The transmittance T of the ultraviolet and blue light blocking coating at a wavelength of 460 nm ４６０ and transmittance T at a wavelength of 410 nm ４１０ The ratio to 4≦T ４６０ / T ４１０ ≦12, 10. The ultraviolet and blue light blocking laminated glass according to claim 9.

14. The curved glass plate has a transmittance of 70% or more in the wavelength range of 400 nm to 800 nm.

10. The ultraviolet and blue light blocking laminated glass according to claim 9.

15. The ultraviolet and blue light blocking coating has a transmittance of 70% or more in the wavelength range of 400 nm to 800 nm.

10. The ultraviolet and blue light blocking laminated glass according to claim 9.

16. the ultraviolet and blue light blocking coating has a transmittance of 70% or more in a wavelength range of 400 nm to 800 nm after undergoing a 3,000-hour xenon lamp aging test; and the ultraviolet and blue light blocking coating has a haze difference of less than 2% after undergoing a 1,000-rotation abrasion resistance test using a flat abrasion tester.

10. The ultraviolet and blue light blocking laminated glass according to claim 9.

17. The curved glass sheet is obtained by subjecting a flat glass sheet to a high temperature heat treatment at least at 560°C and a bending process.

10. The ultraviolet and blue light blocking laminated glass according to claim 9.

18. A light-controllable or light-emitting laminated glass that blocks ultraviolet and blue light, comprising a first glass plate, a first adhesive layer, a light-control structure or a light-emitting structure, a second adhesive layer, and a second glass plate, which are laminated in this order; an ultraviolet and blue light blocking coating is disposed between the first glass plate and the light control structure or the light emitting structure, and / or between the second glass plate and the light control structure or the light emitting structure, the ultraviolet and blue light blocking coating comprising silica, an ultraviolet absorber, and a blue light absorber, the ultraviolet and blue light blocking coating having a transmittance of 5% or less in a wavelength range of 300 nm to 400 nm, the ultraviolet and blue light blocking coating having a maximum transmittance of less than 30% in a wavelength range of 400 nm to 440 nm, the ultraviolet absorber having a maximum absorption peak in a wavelength range of 330 nm to 370 nm, and the blue light absorber having a maximum absorption peak in a wavelength range of 400 nm to 420 nm; 1. A light-controllable or light-emitting laminated glass that blocks ultraviolet and blue light.

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