Laminated Glass

Abstract

Provided is a laminated glass comprising an outer glass sheet, an inner glass sheet, a functional coating layer, and a functional film located between the outer glass sheet and the inner glass sheet. The functional coating layer is located on the surface of the outer glass sheet, the inner glass sheet, or the functional film, and is obtained by curing a functional paint containing an infrared absorbing agent and / or an ultraviolet absorbing agent as a raw material. The functional film includes at least two layers of resin film laminated alternately. The laminated glass has excellent heat shielding performance, ultraviolet ray blocking ability, and electromagnetic wave transmission performance.

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority based on a Chinese patent application filed with the China Patent Office on March 10, 2022, application number 202210237283.6, and titled "Laminated Glass," the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of glass manufacturing technology, and in particular to laminated glass having a low solar heat gain coefficient. [Background technology]

[0003] More and more attention is being paid to the comfort of driving a car. Under continuous sunlight irradiation, ultraviolet light, visible light, infrared light, etc. inside the car will increase the temperature inside the car and accelerate the deterioration of the parts inside the car. Therefore, while meeting the requirements for glass transmittance, it is necessary to further reduce the light transmittance or increase the light reflection, so as to further reduce the temperature rise inside the car and the deterioration of the parts, and prevent the damage to the retina, skin, etc. caused by ultraviolet rays.

[0004] CN101168476A disclosed a bakeable bendable low emissivity coated glass, which has a visible light transmittance of 76% or more and a solar light transmittance of 53% or less after being formed into a laminated insulating glass.

[0005] CN108911528A discloses a double-sided coated heat-insulating automotive glass and a manufacturing method thereof, in which a metal layer, an anti-ultraviolet layer, an infrared reflective layer and a protective layer are coated on the glass surface by magnetron sputtering, thereby realizing an ultraviolet blocking rate of 92% below 355 nm and an infrared reflectance rate of more than 60% in the range of 900-3000 nm.

[0006] In CN101168476A and CN108911528A, a metal layer is placed inside the glass to block ultraviolet and infrared rays, achieving a certain degree of heat insulation and ultraviolet blocking effect. However, the metal layer also causes the final product to have strong electromagnetic wave blocking properties. In addition, the coating glass process is currently complicated, the equipment maintenance costs are high, and the conditions for implementation are strict. Summary of the Invention [Problem to be solved by the invention]

[0007] In order to solve the above problems, the object of the present invention is to provide a laminated glass that can achieve good ultraviolet and infrared blocking performance through the synergistic effect of a functional film and a functional coating layer without using a magnetron sputtering coating process, effectively reduces the solar heat gain coefficient, reduces costs, and does not block electromagnetic signals. [Means for solving the problem]

[0008] In order to achieve the above object, the present invention provides a laminated glass comprising an outer glass sheet, an inner glass sheet, a functional coating layer, and a functional film, the functional film being located between the outer glass sheet and the inner glass sheet, the functional coating layer being coated on the surface of the outer glass sheet, the surface of the inner glass sheet, or the surface of the functional film, the functional coating layer being capable of absorbing infrared rays and / or ultraviolet rays, the functional coating layer having a thickness of 3 μm-20 μm, the functional film including at least two layers of resin film laminated alternately, and the visible light transmittance of the functional film being 70% or more.

[0009] In some specific embodiments, the functional coating layer is obtained by curing a functional paint, and the raw material of the functional paint includes an infrared absorbing agent and / or an ultraviolet absorbing agent.

[0010] In some specific embodiments, the functional film has a thickness of 50 μm-200 μm.

[0011] In some specific embodiments, the laminated glass has a visible light transmittance of 70% or more, and a solar heat gain coefficient of the laminated glass of 45% or less.

[0012] In some specific embodiments, the laminated glass has a visible light transmittance of 55% or less and a solar heat gain coefficient of 40% or less.

[0013] In some specific embodiments, the laminated glass has a visible light transmittance of 10% or less and a solar heat gain coefficient of 30% or less.

[0014] In some specific embodiments, the laminated glass has a visible light transmittance of 5% or less and a solar heat gain coefficient of 20% or less.

[0015] In some specific embodiments, the laminated glass may further include a light control element located between the functional film and the inner glass sheet.

[0016] In some specific embodiments, the light control element includes a PDLC light control film, an SPD light control film, or an EC light control film.

[0017] In some specific embodiments, the laminated glass further comprises at least one adhesive layer positioned between the outer and inner glass sheets.

[0018] In some specific embodiments, the material of the adhesive layer includes one or a combination of two or more of PVB (polyvinyl butyral), PU (polyurethane), SGP (ionic polymer film), and EVA (ethylene-vinyl acetate copolymer).

[0019] In some specific embodiments, the laminated glass includes at least two adhesive layers, one between the outer glass sheet and the functional film and the other between the inner glass sheet and the functional film, and the adhesive layer between the outer glass sheet and the functional film has a visible light transmittance of 80% or more.

[0020] In some specific embodiments, the infrared reflectance of the functional film is 35% or more. Here, the infrared reflectance can be measured and calculated in accordance with ISO9050 in the wavelength range of 780 nm to 2500 nm.

[0021] In some specific embodiments, the functional film may include 50-5000 layers of alternating resin films, and the difference in refractive index between adjacent resin films is 0.05 or more.

[0022] In some specific embodiments, the material of the resin film includes one or a combination of two or more of polyethylene, polypropylene, polylactic acid, poly(4-methylpentene-1), polyvinylidene fluoride, cyclic polyolefin, polymethyl methacrylate, polyvinyl chloride, polyvinyl alcohol, polyamide, polystyrene, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, and polyetherimide.

[0023] In some specific embodiments, the raw materials of the functional coating material include a chelating agent, a silica sol, a transparent resin, and an infrared absorbing agent. The raw materials of the chelating agent include an ultraviolet absorbing agent.

[0024] In some specific embodiments, the UV absorber in the chelating agent raw material includes one or more of the following UV absorbers: benzophenone UV absorbers, benzimidazole UV absorbers, triazine UV absorbers, azo UV absorbers, isoindolinone UV absorbers, quinophthalone UV absorbers, and benzimidazolone UV absorbers. Specifically, the UV absorber may include Qingdao Jedjia BP-2, etc.

[0025] In some specific embodiments, the mass ratio of the chelating agent, the silica sol, the transparent resin, and the infrared absorbing agent is (5-20):100:(20-40):(1-15).

[0026] In some specific embodiments, the chelating agent source further comprises a first catalyst, a first coupling agent, and a first solvent.

[0027] In some specific embodiments, in the raw material of the chelating agent, the mass ratio of the ultraviolet absorber, the first catalyst, the first coupling agent, and the first solvent is (1-30):(0.01-1):(10-30):(40-60).

[0028] In some specific embodiments, the silica sol source comprises a silicate, a second catalyst, a second coupling agent, a second solvent, and water.

[0029] In some specific embodiments, in the silica sol raw material, the mass ratio of the silicate, the second catalyst, the second coupling agent, the second solvent and water is (15-35):(0.01-1):(5-15):(30-60):(10-30).

[0030] In some specific embodiments, the transparent resin includes an epoxy resin or the like.

[0031] In some specific embodiments, the infrared absorbing agent is a nanoparticle of a transparent conductive oxide, where the transparent conductive oxide is ITO, FTO, WO3, Cs x It may also include one or a combination of two or more of WO3, ATO, and doped VO2.

[0032] In some specific embodiments, the laminated glass has a first vertical radius of curvature. The functional film after preforming has a second vertical radius of curvature. The second vertical radius of curvature (of the functional film after preforming) is 40%-100% of the first vertical radius of curvature (of the laminated glass). The preforming process refers to a process in which a functional film is laid on a curved glass plate before forming the laminated glass, and a functional paint is applied to the surface of the functional film and thermally cured. The surface of the functional film after preforming has a functional coating layer.

[0033] In some specific embodiments, the outer glass sheet is clear glass or colored glass having a visible light transmittance of 70% or more, and the inner glass sheet is clear glass or colored glass having a visible light transmittance of 70% or more.

[0034] In some specific embodiments, the laminated glass further comprises a low emissivity coating.

[0035] In some specific embodiments, the low-emissivity coating is deposited on the surface of the interior glass sheet that is closest to the interior of the vehicle.

[0036] In some specific embodiments, the low emissivity coating comprises at least one transparent conductive oxide layer.

[0037] In some specific embodiments, when the laminated glass includes a low emissivity coating, the laminated glass has an emissivity of 0.01-0.25 measured from the inside of the vehicle. Effect of the Invention

[0038] The beneficial effects of the present invention are as follows: The solar heat gain coefficient (TTS) of the laminated glass provided by the present invention can be 45% or less, even 30% or less, even 20% or less, and has excellent heat insulating performance, and the laminated glass can block at least 99% of ultraviolet rays in the wavelength range of 300nm-380nm, and can block at least 99% of ultraviolet rays and visible light in the wavelength range of 300nm-420nm, which is favorable for energy saving of the air conditioner in the car, provides people with a comfortable driving environment, and further reduces the deterioration of interior parts caused by ultraviolet radiation and the melanin deposition caused by long-term radiation on the human body. The laminated glass provided by the present invention has better electromagnetic wave transmission performance, and is easy to realize bending forming of the laminated glass, which meets the needs of using window glass in different parts of the vehicle. [Brief description of the drawings]

[0039] [Figure 1] Schematic diagrams of the structures of Examples 1 to 5 of the laminated glass according to the present invention [Diagram 2] Schematic diagram of the structure of Example 6 of the laminated glass according to the present invention [Diagram 3] Schematic diagram of the structure of Example 7 of the laminated glass according to the present invention [Figure 4] Schematic diagram of the structure of Example 8 of the laminated glass according to the present invention [Diagram 5] Schematic diagram of the structure of Example 9 of the laminated glass according to the present invention [Figure 6] Schematic diagram of the structure of laminated glass including the light control element according to the present invention [Figure 7] Schematic diagram of the structure of laminated glass containing the low-emissivity coating according to the present invention DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] In order to make the technical features, objectives and beneficial effects of the present invention more clearly understood, the technical solutions of the present invention are described in detail below, but should not be understood as limiting the possible scope of the present invention.

[0041] As shown in Figures 1-5, the present invention provides a laminated glass including an outer glass sheet 10, an inner glass sheet 60, a functional coating layer 30, and a functional film 40. The functional film 40 is located between the outer glass sheet 10 and the inner glass sheet 60. The functional coating layer 30 is coated on the surface of the outer glass sheet 10 (Figures 1 and 2), the surface of the inner glass sheet 60 (Figures 3 and 5), or the surface of the functional film 40 (Figure 4). The functional coating layer 30 can absorb infrared and / or ultraviolet rays, and the thickness of the functional coating layer 30 is 3 μm-20 μm. The functional film 40 includes at least two layers of resin films alternately laminated, and the visible light transmittance of the functional film 40 is 70% or more.

[0042] In the present invention, the functional coating layer 30 is obtained by curing a functional paint, and the raw material of the functional paint includes an infrared absorbing agent and / or an ultraviolet absorbing agent.

[0043] In the present invention, the thickness of the functional film 40 is generally controlled to be 50 μm to 200 μm.

[0044] In the present invention, the laminated glass further includes at least one adhesive layer, such as the first adhesive layer 20, the second adhesive layer 50, and the third adhesive layer 80 shown in Figures 1 to 7. The adhesive layer is located between the outer glass sheet 10 and the inner glass sheet 60, and the material of the adhesive layer includes one or a combination of two or more of PVB (polyvinyl butyral), PU (polyurethane), SGP (ionic polymer film), and EVA (ethylene-vinyl acetate copolymer).

[0045] Furthermore, the laminated glass includes at least two adhesive layers, which are located between the outer glass plate 10 and the functional film 40 and between the inner glass plate 60 and the functional film 40, respectively, and the adhesive layer (e.g., the first adhesive layer 20) located between the outer glass plate 10 and the functional film 40 has a visible light transmittance of 80% or more.

[0046] In the present invention, after the laminated glass is installed in a vehicle, the outer glass sheet 10 is located on the outer side of the vehicle and has a first surface 11 facing the exterior of the vehicle and a second surface 12 facing the interior of the vehicle. The inner glass sheet 60 is located on the inner side of the vehicle and has a third surface 61 facing the exterior of the vehicle and a fourth surface 62 facing the interior of the vehicle. The functional film 40 has a first convex surface 41 facing the outer glass sheet 10 and a second concave surface 42 facing the inner glass sheet 60.

[0047] Here, the functional coating layer 30 is used to absorb ultraviolet and infrared rays, and the functional film 40 is used to reflect infrared rays, and the synergistic effect of the functional coating layer 30 and the functional film 40 can reduce the solar heat gain coefficient (TTS) of the laminated glass and block ultraviolet rays. In the prior art, it is usually necessary to provide an infrared reflective coating containing at least one metal layer in the glass to reduce infrared radiation, but the infrared reflective coating causes the problem of blocking electromagnetic waves. In the present invention, by providing the functional coating layer 30 and the functional film 40, it is not necessary to separately provide the infrared reflective coating, and the laminated glass does not block electromagnetic waves, ensuring the transmission of communication signals. The solar heat gain coefficient (TTS) of the laminated glass of the present invention can be 45% or less, and can block at least 99% of ultraviolet rays in the wavelength range of 300nm-380nm.

[0048] In some specific embodiments, the visible light transmittance of the laminated glass is 70% or more, and the solar heat gain coefficient of the laminated glass is 45% or less. Specifically, the solar heat gain coefficient may be 19%-45%, for example, 20%, 25%, 30%, 35%, 40%, etc. Or, the solar heat gain coefficient may be 19% or less. The laminated glass meets the requirements of heat insulation and driving safety standards, and can be used as a windshield, side window, rear window, or roof glass.

[0049] In some specific embodiments, the visible light transmittance of the laminated glass is 55% or less, and the solar heat gain coefficient of the laminated glass is 40% or less. The laminated glass meets the requirements for heat insulation and privacy protection inside the vehicle, and can be used as side glass, rear glass, and roof glass.

[0050] In some specific embodiments, the visible light transmittance of the laminated glass is 10% or less, and the solar heat gain coefficient of the laminated glass is 30% or less. The laminated glass meets the heat shielding requirements and also meets the requirements of low visible light transmittance and even ultra-low visible light transmittance, and can be used as roof glass. In this way, the purpose of eliminating the traditional sunroof shade is realized, the interior space of the vehicle is increased, and the overall cost of the vehicle is reduced. Furthermore, the visible light transmittance of the laminated glass of the present invention is 5% or less, even 4% or less, 3% or less, 2% or less, or 1% or less, and the solar heat gain coefficient of the laminated glass is 20% or less, specifically, for example, 19% or less, 18% or less, 17% or less, 16% or less, 15% or less, 14% or less, 13% or less, 12% or less, 11% or less, or 10% or less.

[0051] In some specific embodiments, the laminated glass with low visible light transmittance may further include a light control element. As shown in Fig. 6, the light control element 70 is located between the functional film 40 and the inner glass sheet 60 and is used to adjust the visible light transmittance and solar heat gain coefficient of the laminated glass.

[0052] In some specific embodiments, the laminated glass may further include a low-emissivity (Low-E) coating. As shown in Figure 7, a low-emissivity coating 90 may be deposited on the fourth surface 62 of the inner glass sheet 60 to further reduce the radiation intensity into the vehicle interior.

[0053] In some specific embodiments, the outer glass sheet 10 and the inner glass sheet 60 are both curved glass sheets. The curved glass sheet used in the present invention may be obtained by subjecting a flat straight glass to high-temperature heat treatment at 560°C or more and bending. In the present invention, the surfaces of the outer glass sheet 10 and the inner glass sheet 60 do not need to be provided with an infrared reflective coating containing at least one metal layer (for example, a silver one-layer infrared reflective coating, a silver two-layer infrared reflective coating, a silver three-layer infrared reflective coating, a silver four-layer infrared reflective coating, etc., known to those skilled in the art), which solves the difficult problem that the outer glass sheet 10 and the inner glass sheet 60 cannot be simultaneously bent, reduces the difficulty of bending and producing the outer glass sheet 10 and the inner glass sheet 60, and improves the production efficiency of bending.

[0054] The laminated glass described in the present invention can be classified as an absorbing-reflecting laminated glass or a reflecting-absorbing laminated glass, depending on the relative positions of the functional coating layer 30 and the functional film 40. For example, an absorbing-reflecting laminated glass is shown in Fig. 1 and Fig. 2, and a reflecting-absorbing laminated glass is shown in Fig. 3 to Fig. 7.

[0055] 1 and 2, the functional coating layer 30 is located on the outer side of the functional film 40, i.e., the functional coating layer 30 is closer to the outer glass sheet 10 than the functional film 40. In this way, when sunlight is irradiated from the outside to the inside of the vehicle, a portion of the sunlight is first absorbed by the functional coating layer 30 and then a portion of the sunlight is reflected by the functional film 40, thereby reducing the solar heat gain coefficient (TTS) and blocking most of the ultraviolet rays.

[0056] As shown in Figure 1, when viewed from outside the vehicle toward the inside, the structure of the laminated glass is, in order, an outer glass plate 10, a first adhesive layer 20, a functional coating layer 30, a functional film 40, a second adhesive layer 50, and an inner glass plate 60, and the functional coating layer 30 is coated on a first convex surface 41 of the functional film 40.

[0057] As shown in Figure 2, when viewed from outside the vehicle toward the inside, the laminated glass is structured, in order, as an outer glass sheet 10, a functional coating layer 30, a first adhesive layer 20, a functional film 40, a second adhesive layer 50, and an inner glass sheet 60, and the functional coating layer 30 is coated on the second surface 12 of the outer glass sheet 10.

[0058] 3 to 7, the functional film 40 is located outside the functional coating layer 30, i.e., the functional film 40 is closer to the exterior glass sheet 10 than the functional coating layer 30. When sunlight is irradiated from the outside to the inside of the vehicle, a portion of the sunlight is first reflected by the functional film 40 and then absorbed by the functional coating layer 30, thereby reducing the solar heat gain coefficient (TTS) and blocking most of the ultraviolet rays.

[0059] As shown in Figure 3, when viewed from outside the vehicle toward the inside, the structure of the laminated glass is, in order, an outer glass plate 10, a first adhesive layer 20, a functional film 40, a second adhesive layer 50, a functional coating layer 30, and an inner glass plate 60, with the functional coating layer 30 being coated on the third surface 61 of the inner glass plate 60.

[0060] As shown in Figure 4, when viewed from outside the vehicle toward the inside, the structure of the laminated glass is, in order, an outer glass plate 10, a first adhesive layer 20, a functional film 40, a functional coating layer 30, a second adhesive layer 50, and an inner glass plate 60, and the functional coating layer 30 is coated on the second concave surface 42 of the functional film 40.

[0061] As shown in Figure 5, when viewed from outside the vehicle toward the inside, the structure of the laminated glass is, in order, an outer glass plate 10, a first adhesive layer 20, a functional film 40, a second adhesive layer 50, an inner glass plate 60, and a functional coating layer 30, and the functional coating layer 30 is coated on the fourth surface 62 of the inner glass plate 60.

[0062] As shown in Figure 6, when viewed from outside the vehicle toward the inside, the structure of the laminated glass is, in order, an outer glass plate 10, a first adhesive layer 20, a functional film 40, a functional coating layer 30, a second adhesive layer 50, a light control element 70, a third adhesive layer 80, and an inner glass plate 60, in which the functional coating layer 30 is coated on the second concave surface 42 of the functional film 40, and the light control element 70 is located between the functional coating layer 30 and the inner glass plate 60, more specifically, the light control element 70 is located between the second adhesive layer 50 and the third adhesive layer 80.

[0063] 6, the light control element 70 used in the laminated glass may be a PDLC light control film, an SPD light control film, or an EC light control film. Preferably, the functional coating layer 30 and the functional film 40 are both located outside the light control element 70. This reduces the solar heat gain coefficient of the laminated glass and blocks ultraviolet rays, while preventing the light control element from being deteriorated by sunlight and extending the service life of the light control element.

[0064] As shown in FIG. 7, when viewed from the outside of the vehicle toward the inside of the vehicle, the laminated glass has a structure consisting of, in order, an outer glass sheet 10, a first adhesive layer 20, a functional film 40, a functional coating layer 30, a second adhesive layer 50, an inner glass sheet 60, and a low-emissivity coating 90. The functional coating layer 30 is coated on the second concave surface 42 of the functional film 40, and the low-emissivity coating 90 is deposited on the fourth surface 62 of the inner glass sheet, i.e., the surface of the inner glass sheet 60 closest to the vehicle interior.

[0065] In FIG. 7, the low-emission coating 90 in the laminated glass includes at least one transparent conductive oxide layer (TCO layer), examples of which include an ITO (indium tin oxide) layer, an FTO (fluorine-doped tin oxide) layer, an ATO (antimony-doped tin oxide) layer, and an AZO (aluminum-doped zinc oxide) layer. The low-emission coating 90 can reduce the emissivity of the laminated glass measured from the inside of the vehicle. In the present invention, the laminated glass having the low-emission coating has an emissivity of 0.01-0.25 measured from the inside of the vehicle. In this way, it has the effect of making the inside of the vehicle warmer in winter and cooler in summer, reducing the energy consumption of the air conditioner for heating and cooling, and has the advantages of energy saving and environmental friendliness.

[0066] The functional coating layer 30 of the present invention absorbs visible light, and can make the visible light transmittance of the laminated glass less than 70%, or less than 60%, or less than 50%, or less than 40%, or less than 30%, or less than 20%, or less than 10%, or less than 5%. In particular, for visible light in the wavelength range of 380nm-420nm, the laminated glass has a visible light transmittance of 1% or less in the wavelength range of 380nm-420nm, and the laminated glass of the present invention has a visible light transmittance of 1% or less in the wavelength range of 300nm-380nm, so that the laminated glass of the present invention can block at least 99% of ultraviolet light and visible light in the wavelength range of 300nm-420nm by the functional coating layer 30. In some specific embodiments, it is preferable to use standard PVB as the adhesive layer, compared with the case where EVA or ultraviolet enhanced PVB is used as the adhesive layer. Standard PVB can provide adhesion while protecting the light control element and the like from ultraviolet degradation, and can significantly reduce the cost of the laminated glass and improve the product competitiveness.

[0067] In some specific embodiments, the outer glass sheet 10 is a transparent glass or a colored glass having a visible light transmittance of 70% or more, and the inner glass sheet 60 is a transparent glass or a colored glass having a visible light transmittance of 70% or more. Since the functional coating layer 30 used in the present invention can effectively absorb visible light, when selecting the outer glass sheet and the inner glass sheet, there is no need to use low-transmittance colored glass as the outer glass sheet or the inner glass sheet, which can significantly reduce the cost of the laminated glass and improve the product competitiveness.

[0068] In the present invention, the thickness of the functional film 40 is controlled to 50 μm-200 μm, and the visible light transmittance of the functional film is 70% or more, and the functional film has the characteristics of being thin and excellent in light transmittance. The infrared reflectance of the functional film 40 used in the present invention is 35% or more, and the functional film 40 includes 50-5000 layers of alternately laminated resin films, and the functional film 40 can reduce the solar heat gain coefficient of the laminated glass and does not block electromagnetic waves. Preferably, the functional film 40 includes 100-2000 layers of alternately laminated resin films, specifically, for example, 100 layers, 200 layers, 300 layers, 400 layers, 500 layers, 600 layers, 700 layers, 800 layers, 900 layers, 1000 layers, 1100 layers, 1200 layers, 1300 layers, 1400 layers, 1500 layers, 1600 layers, 1700 layers, 1800 layers, 1900 layers, 2000 layers, etc. The difference in refractive index between adjacent resin films is 0.05 or more, and the difference in refractive index between adjacent resin films is preferably 0.1 or more, specifically, for example, 0.1, 0.2, 0.3, 0.4, 0.5, etc. In some specific embodiments, the material of the resin film includes one or a combination of two or more of polyethylene, polypropylene, polylactic acid, poly(4-methylpentene-1), polyvinylidene fluoride, cyclic polyolefin, polymethyl methacrylate, polyvinyl chloride, polyvinyl alcohol, polyamide, polystyrene, polycarbonate, polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, and polyetherimide.

[0069] In the present invention, the raw materials of the functional coating material include a chelating agent, a silica sol, a transparent resin, and an infrared absorbing agent, and the raw materials of the chelating agent include an ultraviolet absorbing agent, where the mass ratio of the chelating agent, the silica sol, the transparent resin, and the infrared absorbing agent is (5-20):100:(20-40):(1-15).

[0070] In some specific embodiments, the UV absorber includes one or a combination of two or more of benzophenone UV absorbers, benzimidazole UV absorbers, triazine UV absorbers, azo UV absorbers, isoindolinone UV absorbers, quinophthalone UV absorbers, and benzimidazolone UV absorbers. Specifically, Qingdao Jedejia BP-2 may be included.

[0071] In some specific embodiments, the infrared absorbing agent is a transparent conductive oxide nanoparticle, and the transparent conductive oxide may be ITO (indium tin oxide), FTO (fluorine doped tin oxide), WO3 (tungsten(VI) oxide), Cs x It includes at least one of WO3 (cesium doped tungsten (VI) oxide, CWO), ATO (antimony doped tin oxide) and doped VO2 (doped vanadium dioxide).

[0072] In the raw material of the functional paint, the transparent resin is a resin that is soluble in water and easily soluble in organic solvents. The transparent resin can be modified by coating an ultraviolet absorber or an infrared absorber, so as to further improve the dispersion of these two absorbers in the solvent. In some specific embodiments, the transparent resin is an epoxy resin. The epoxy bond of the epoxy resin can generate radicals during the curing process of the functional paint, promote the curing of the functional coating layer, and further enhance the toughness of the formed functional coating layer.

[0073] In some specific embodiments, the ultraviolet absorber is added to the functional coating layer as a chelating agent. The raw materials of the chelating agent specifically include an ultraviolet absorber, a first catalyst, a first coupling agent, and a first solvent. The mass ratio of the ultraviolet absorber, the first catalyst, the first coupling agent, and the first solvent is (1-30):(0.01-1):(10-30):(40-60). Here, the first catalyst includes one or more combinations of dibutyltin dilaurate, an organic bismuth catalyst (e.g., bismuth isooctanoate), and stannous octanoate. The first coupling agent is a silane coupling agent, and includes, for example, one or more combinations of 3-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-(2,3-glycidoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane. The first solvent comprises one or a combination of two or more of butyl acetate, propylene glycol methyl ether, isobutyl acetate, and xylene.

[0074] In some specific embodiments, the raw material of the silica sol includes a silicate, a second catalyst, a second coupling agent, a second solvent, and water. The mass ratio of the silicate, the second catalyst, the second coupling agent, the second solvent, and water is (15-35):(0.01-1):(5-15):(30-60):(10-30). Here, the silicate includes a silicate ester and / or an oxysilane, and may include, for example, one or more combinations of methyl orthosilicate, ethyl orthosilicate, trimethoxysilane, triethoxysilane, and dimethyldimethoxysilane. The second catalyst may include an acid, an alkali, and the like, and may include, for example, one or more combinations of hydrochloric acid, nitric acid, and aqueous ammonia. The second coupling agent may include one or more combinations of silane coupling agents, such as 3-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ-(2,3-glycidoxy)propyltrimethoxysilane, γ-methacryloxypropyltrimethoxysilane, and N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane. The second solvent may include one or more combinations of methanol, ethanol, propanol, isopropanol, butanol, and propylene glycol methyl ether.

[0075] In Fig. 1-7, the functional coating layer 30 may be coated on the second surface 12 of the outer glass sheet 10 (Fig. 2), or the first convex surface 41 of the functional film 40 (Fig. 1), or the second concave surface 42 of the functional film 40 (Fig. 4, Fig. 6, Fig. 7), or the third surface 61 of the inner glass sheet 60 (Fig. 3), or the fourth surface 62 of the inner glass sheet (Fig. 5). The present invention is not limited thereto, and it is understood that a plurality of functional coating layers 30 may be provided, and the plurality of functional coating layers 30 are simultaneously coated on at least two of the above surfaces. For example, the functional coating layer 30 is simultaneously coated on the second surface 12 of the outer glass sheet 10 and the third surface 61 of the inner glass sheet 60.

[0076] In the present invention, the functional coating layer 30 is obtained by curing the functional paint. The curing temperature may be 70°C-150°C (for example, 80°C, 100°C, 120°C, 150°C), and the curing time may be 10 minutes-200 minutes.

[0077] In some specific embodiments, the laminated glass, the inner glass sheet 60 and / or the outer glass sheet 10 have a first vertical radius of curvature. In the present invention, the first vertical radius of curvature is the vertical radius of curvature of the final shape of the outer glass sheet 10 and / or the inner glass sheet 60 after bending, and at the same time, the first vertical radius of curvature is also the vertical radius of curvature of the laminated glass consisting of the outer glass sheet 10, the inner glass sheet 60, the functional coating layer 30, the functional film 40, etc. In a specific embodiment, the first vertical radius of curvature is the radius of curvature of the arc from the bottom to the top after the laminated glass is installed in the vehicle. The first vertical radius of curvature is preferably 4000mm-15000mm.

[0078] In some specific embodiments, the functional coating layer 30 is coated on the surface of the functional film 40, for example, the first convex surface 41 and / or the second concave surface 42 of the functional film 40. Since the functional film 40 has a certain flexibility, the functional film 40 coated with the functional coating layer 30 is preformed before forming the laminated glass, so that the functional film 40 coated with the functional coating layer 30 has a second vertical radius of curvature after preforming. By setting the second vertical radius of curvature of the functional film 40 after preforming to be 40%-100% of the first vertical radius of curvature of the laminated glass, the functional film 40 coated with the functional coating layer 30 can have a curved surface that is approximately similar to the final shape of the laminated glass, thereby reducing or eliminating the wrinkle problem of the functional film during the subsequent production process of the laminated glass (e.g., during autoclave treatment), and further fitting it to the curved surface of the outer glass sheet or the inner glass sheet.

[0079] Specifically, the preforming process involves preparing a bent glass plate having a first vertical radius of curvature, laying a functional film 40 on the convex or concave surface of the bent glass plate, and then applying a functional paint to the first convex surface 41 or the second concave surface 42 of the functional film 40 (for example, when the functional film 40 is laid on the concave surface of the bent glass and the first convex surface 41 of the functional film 40 is attached to the bent glass, the functional paint is applied to the second concave surface 42 of the functional film 40 accordingly, and vice versa), and then heat-curing them together (for example, in an oven) at a heat-curing temperature of 70°C-150°C to obtain a functional film 40 coated with a functional coating layer 30 having a preformed (pre-bent) second vertical radius of curvature.

[0080] In the present invention, when the functional coating layer 30 in the laminated glass is located on the surface of the functional film 40, the manufacturing method of the laminated glass may include the following steps. 1. The functional film 40 is laid on a curved glass plate, and a functional paint is applied to the surface of the functional film 40 away from the curved glass plate, and then heat-cured to obtain a functional film 40 having a second vertical curvature radius after preforming. 2. The preformed functional film is laminated in order to an inner glass plate 60 having a first perpendicular radius of curvature and an outer glass plate 10 to obtain a laminated glass.

[0081] The outer glass plate and the inner glass plate used in the following examples and comparative examples are all bent glass plates, and both sides of each bent glass plate are divided into convex and concave surfaces according to the degree of curvature. In the state of use, the first surface of the outer glass plate is a convex surface, the second surface of the outer glass plate is a concave surface, the third surface of the inner glass plate is a convex surface, and the fourth surface of the inner glass plate is a concave surface.

[0082] The chelating agents used in the following examples were prepared as follows.

[0083] Chelating agent A is obtained by mixing, by mass, 2 parts of an ultraviolet absorber (Qingdao Jedica BP-2), 0.002 parts of dibutyltin dilaurate, 2 parts of 3-aminopropyltrimethoxysilane, and 5 parts of propylene glycol methyl ether (as a first solvent), heating and refluxing with stirring. Chelating agent B is prepared by mixing, by mass, 2.5 parts of an ultraviolet absorber (Qingdao Jedica 1226), 0.002 parts of dibutyltin dilaurate, 2.5 parts of 3-aminopropyltrimethoxysilane, and 5 parts of propylene glycol methyl ether (as a first solvent), heating and refluxing with stirring to obtain chelating agent B.

[0084] In the present invention, the ultraviolet absorber is added to the functional coating layer as a chelating agent, which contributes to better compatibility between the ultraviolet absorber and the silica sol and improves the stability of the functional coating layer.

[0085] The method for preparing silica sol C used in the following Examples and Comparative Examples is as follows.

[0086] In terms of parts by mass, 20 parts of ethyl orthosilicate, 1 part of 0.1N nitric acid solution, 10 parts of γ-aminopropyltriethoxysilane, 50 parts of propylene glycol methyl ether and 20 parts of deionized water are mixed and stirred to obtain silica sol C.

[0087] The functional film used in the following examples is a commercially available infrared reflective film, such as Toray Picasus IR film, which has a reflectance of at least 35% for infrared rays of 780 nm to 2500 nm, and is composed of 100 to 2000 alternating layers of resin film, with a thickness of 50 μm to 200 μm and a visible light transmittance of 70% or more.

[0088] <Comparative Example 1 and Examples 1 to 5> Example 1 Example 1 provides a laminated glass, the manufacturing method of which includes: 1, chelating agent A 10g, silica sol C 70g, epoxy resin 17g, infrared absorbing agent (Cs x WO3) 2g was mixed and stirred uniformly to obtain a functional coating material. 2. A bent glass plate having a first vertical curvature radius was prepared as the inner glass plate 60, and a functional film 40 was laid on the convex surface of the bent glass plate (the bent glass plate is different from the inner glass plate 60. The same applies to the following examples and comparative examples). Then, a functional paint was applied to the first convex surface 41 of the functional film 40, and then these were thermally cured together in an oven to obtain a functional film 40 coated with a functional coating layer 30 having a preformed second vertical curvature radius. The thickness of the functional coating layer 30 was 3.2 μm. Here, the second vertical curvature radius was 75% of the first vertical curvature radius. 3. Another bent glass sheet having a first vertical curvature radius was used as the outer glass sheet 10 (equal to the first vertical curvature radius of the inner glass sheet 60; the same applies to the following examples and comparative examples), and two standard PVB sheets were used as the first adhesive layer 20 and the second adhesive layer 50. The two bent glass sheets, the two standard PVB sheets, and the functional film 40 coated with the functional coating layer 30 were laminated in the stacking order shown in Figure 1, and laminated glass D1 was obtained according to the automotive glass production process.

[0089] Example 2 Example 2 provides a laminated glass, the manufacturing method of which includes: 1, chelating agent B 10g, silica sol C 70g, epoxy resin 17g, infrared absorbing agent (Cs x WO3) 2g was mixed and stirred uniformly to obtain a functional coating material. 2. A bent glass plate having a first vertical curvature radius was prepared as the inner glass plate 60, and a functional film 40 was laid on the convex surface of the bent glass plate. Then, a functional paint was applied to the first convex surface 41 of the functional film 40, and then these were thermally cured together in an oven to obtain a functional film 40 coated with a functional coating layer 30 having a preformed second vertical curvature radius. The thickness of the functional coating layer 30 was 5.2 μm. Here, the second vertical curvature radius was 75% of the first vertical curvature radius. 3. Another bent glass sheet having a first vertical curvature radius is used as the outer glass sheet 10, and two standard PVB sheets are used as the first adhesive layer 20 and the second adhesive layer 50. The two bent glass sheets, the two standard PVB sheets, and the functional film 40 coated with the functional coating layer 30 are laminated in the stacking order shown in Figure 1, and laminated glass D2 is obtained according to the automotive glass production process.

[0090] Example 3 Example 3 provides a laminated glass, the manufacturing method of which includes: 1, chelating agent A 10g, silica sol C 70g, epoxy resin 17g, infrared absorbing agent (Cs x WO3) 4g was mixed and stirred uniformly to obtain a functional coating material. 2. A bent glass plate having a first vertical curvature radius was prepared as the inner glass plate 60, and a functional film 40 was laid on the convex surface of the bent glass plate. Then, a functional paint was applied to the first convex surface 41 of the functional film 40, and then these were thermally cured together in an oven to obtain a functional film 40 coated with a functional coating layer 30 having a preformed second vertical curvature radius. The thickness of the functional coating layer 30 was 5.1 μm. Here, the second vertical curvature radius was 75% of the first vertical curvature radius. 3. Another bent glass sheet having a first vertical curvature radius is used as the outer glass sheet 10, and two standard PVB sheets are used as the first adhesive layer 20 and the second adhesive layer 50. The two bent glass sheets, the two standard PVB sheets, and the functional film 40 coated with the functional coating layer 30 are laminated in the stacking order shown in Figure 1, and laminated glass D3 is obtained according to the automotive glass production process.

[0091] Example 4 Example 4 provides a laminated glass, the manufacturing method of which includes: 1, chelating agent A 10g, silica sol C 70g, epoxy resin 17g, infrared absorbing agent (Cs x WO3) 6.2g was mixed and stirred uniformly to obtain a functional coating material. 2. A bent glass plate having a first vertical curvature radius was prepared as the inner glass plate 60, and a functional film 40 was laid on the convex surface of the bent glass plate. Then, a functional paint was applied to the first convex surface 41 of the functional film 40, and then these were thermally cured together in an oven to obtain a functional film 40 coated with a functional coating layer 30 having a preformed second vertical curvature radius. The thickness of the functional coating layer 30 was 5.4 μm. Here, the second vertical curvature radius was 75% of the first vertical curvature radius. 3. Another bent glass sheet having the first vertical curvature radius is used as the outer glass sheet 10, and two standard PVB sheets are used as the first adhesive layer 20 and the second adhesive layer 50. The two bent glass sheets, the two standard PVB sheets, and the functional film 40 coated with the functional coating layer 30 are laminated in the stacking order shown in Figure 1, and laminated glass D4 is obtained according to the automotive glass production process.

[0092] Example 5 Example 5 provides a laminated glass, the manufacturing method of which includes: 1, chelating agent A 10g, silica sol C 70g, epoxy resin 17g, infrared absorbing agent (Cs x WO3) and 7.3 g were mixed and stirred uniformly to obtain a functional coating material. 2. A bent glass plate having a first vertical curvature radius was prepared as the inner glass plate 60, and a functional film 40 was laid on the convex surface of the bent glass plate. Then, a functional paint was applied to the first convex surface 41 of the functional film 40, and then these were thermally cured together in an oven to obtain a functional film 40 coated with a functional coating layer 30 having a preformed second vertical curvature radius. The thickness of the functional coating layer 30 was 5.2 μm. Here, the second vertical curvature radius was 75% of the first vertical curvature radius. 3. Another bent glass sheet having the first vertical curvature radius is used as the outer glass sheet 10, and two standard PVB sheets are used as the first adhesive layer 20 and the second adhesive layer 50. The two bent glass sheets, the two standard PVB sheets, and the functional film 40 coated with the functional coating layer 30 are laminated in the stacking order shown in Figure 1, and laminated glass D5 is obtained according to the automotive glass production process.

[0093] Comparative Example 1 Comparative Example 1 provides a laminated glass, the manufacturing method of which includes: 1. 80g of silica sol C and 20g of epoxy resin were mixed and stirred uniformly to obtain a comparative paint, which was used instead of the functional paints of Examples 1 to 5. 2. A bent glass plate having a first vertical curvature radius was prepared as the inner glass plate 60, and a functional film 40 was laid on the convex surface of the bent glass plate. Then, a comparative coating material was applied to the first convex surface 41 of the functional film 40, and then these were thermally cured together in an oven to obtain a functional film 40 coated with a comparative coating layer having a preformed second vertical curvature radius. The thickness of the comparative coating layer was 5.1 μm. Here, the second vertical curvature radius was 75% of the first vertical curvature radius. 3. Another bent glass plate having a first vertical curvature radius was used as the outer glass plate 10, and two sheets of standard PVB were used as the first adhesive layer 20 and the second adhesive layer 50. The two bent glass plates, the two sheets of standard PVB and the functional film 40 coated with the comparative coating layer were laminated in the stacking order shown in Figure 1, and a laminated glass S1 was obtained according to the automotive glass production process.

[0094] For the laminated glass S1 obtained in Comparative Example 1 and the laminated glasses D1 to D5 obtained in Examples 1 to 5, tests were performed on the visible light transmittance, ultraviolet light transmittance, solar heat gain coefficient, average transmittance in the wavelength range of 300 nm to 420 nm, signal shielding effect, etc., and the test results are shown in Table 1.

[0095] Regarding the visible light transmittance, the transmission spectrum of the laminated glass in the wavelength range of 250 nm to 2500 nm was measured using a spectrophotometer, and the visible light transmittance TL of 380 nm to 780 nm was calculated according to the standard "ISO 9050 Measurement of building glass light transmittance, direct daylight factor, solar heat gain coefficient, ultraviolet transmittance, and related gloss coefficients."

[0096] Regarding the ultraviolet transmittance, the ultraviolet transmittance TUV of 300 nm to 380 nm was calculated according to the standard "ISO 9050 Measurement of Building Glass Light Transmittance, Direct Daylight Factor, Solar Heat Gain Coefficient and Ultraviolet Transmittance and Such Gloss Coefficients."

[0097] Regarding the solar heat gain coefficient, the solar heat gain coefficient (TTS) was calculated from the transmission spectrum of the laminated glass in the wavelength range of 250nm-2500nm.

[0098] The average transmittance in the wavelength range of 300 nm to 420 nm was calculated from the transmission spectrum of the laminated glass in the wavelength range of 250 nm to 2500 nm.

[0099] The signal shielding effect was tested based on the "GJB6190-2008 Electromagnetic Shielding Material Shielding Effect Measurement Method", and the test frequency band was 1GHz-18GHz.

[0100] In the present invention, the thickness of the functional coating layer and the comparative coating layer is measured by a step gauge.

[0101] Table 1 shows the test results of Comparative Example 1 and Examples 1 to 5.

[0102] [Table 1]

[0103] As can be seen from Table 1, compared with the paint without added chelating agent and infrared absorbent (Comparative Example 1), the paints containing the chelating agent and infrared absorbent provided by the present invention (Examples 1 to 5) have better absorption effect on visible light, control the solar heat gain coefficient to 45% or less, and do not cause the problem of signal blocking.

[0104] <Comparative Example 2 and Examples 6 to 9> Examples 6 to 9 used the same functional paint as Example 3, except that the relative positional relationship between the functional coating layer 30 and the functional film 40 was different, and the thickness of the functional coating layer formed after curing was also the same.

[0105] Example 3 As shown in FIG. 1, the laminated glass D3 has a structure, from the outside to the inside of the vehicle, which is composed of an outer glass plate 10, a first adhesive layer 20, a functional coating layer 30, a functional film 40, a second adhesive layer 50, and an inner glass plate 60, and the functional coating layer 30 is coated on the first convex surface 41 of the functional film 40.

[0106] Example 6: As shown in Figure 2, the laminated glass D6 has a structure, from the outside to the inside of the vehicle, of an outer glass plate 10, a functional coating layer 30, a first adhesive layer 20, a functional film 40, a second adhesive layer 50, and an inner glass plate 60, and the functional coating layer 30 is coated on the second surface 12 of the outer glass plate 10.

[0107] Example 7 As shown in Figure 3, the laminated glass D7 has a structure, from the outside to the inside of the vehicle, which is composed of an outer glass plate 10, a first adhesive layer 20, a functional film 40, a second adhesive layer 50, a functional coating layer 30, and an inner glass plate 60, and the functional coating layer 30 is coated on the third surface 61 of the inner glass plate 60.

[0108] Example 8 As shown in FIG. 4, the laminated glass D8 has a structure, from the outside to the inside of the vehicle, which is composed of an outer glass plate 10, a first adhesive layer 20, a functional film 40, a functional coating layer 30, a second adhesive layer 50, and an inner glass plate 60, in that order, the functional coating layer 30 is coated on the second concave surface 42 of the functional film 40, and the functional film 40 coated with the functional coating layer 30 has been subjected to a pre-forming process.

[0109] Example 9 As shown in Figure 5, the laminated glass D9 has a structure, from the outside to the inside of the vehicle, which is composed of an outer glass plate 10, a first adhesive layer 20, a functional film 40, a second adhesive layer 50, an inner glass plate 60, and a functional coating layer 30, and the functional coating layer 30 is coated on the fourth surface 62 of the inner glass plate 60.

[0110] Comparative Example 2 The ordinary laminated glass, ie, two curved glass sheets and one standard PVB sheet, was laminated according to the automotive glass production process to obtain the laminated glass S2.

[0111] The laminated glass S2 obtained in Comparative Example 2, and the laminated glasses D3 and D6 to D9 obtained in Examples 3 and 6 to 9 were each tested for solar heat gain coefficient, 24-hour UV aging resistance, 48-hour UV aging resistance, wrinkle number evaluation, etc., and the test results are shown in Table 2.

[0112] Regarding UV aging resistance, according to the requirements of the standard GB / T5137.3-2020 "Part 3 of the test method for automotive safety glass: UV resistance, high temperature, moisture, combustion, and simulated climate resistance test", the laminated glass is irradiated with UV rays for 24 hours and 48 hours, respectively, and the change in visible light transmittance before and after UV irradiation is ΔTL=TL 後 -TL 前 was measured.

[0113] To evaluate the number of wrinkles, the number of areas where wrinkles appeared on the adhesive layer and functional film of the laminated glass were observed with the naked eye under irradiation with an inspection light source. A laminated glass with 10 or fewer wrinkled areas was considered to have passed the test.

[0114] Table 2 shows the test results of Comparative Example 2, Example 3 and Examples 6-9.

[0115] [Table 2]

[0116] As can be seen from Table 2, the above six sets of experimental results all meet the 24-hour UV aging resistance test of automotive laminated glass, among which, Example 3 and Example 6 have better results in the 48-hour UV aging resistance test compared with other sets of examples. This is mainly because the infrared absorbing agent and UV absorbing agent in the functional coating layer have a certain protective effect on the functional film. At the same time, the above six sets of experimental results all meet the wrinkle number evaluation, among which, Example 3 and Example 8 have fewer areas with appearance wrinkles compared with other sets of examples. This means that the functional film coated with the functional coating layer can reduce or eliminate the wrinkle problem of the functional film after undergoing preforming treatment, and the stability of the product is enhanced. [Explanation of symbols]

[0117] 10 Outer glass plate 11 First surface of outer glass pane 12 First surface of outer glass pane 20 1st adhesive layer 30 Functional coating layer 40 Functional Films 41 First convex surface of functional film 42 Second concave surface of functional film 50 Second adhesive layer 60 Inner glass plate 61 Third surface of inner glass plate 62 Fourth surface of inner glass plate 70 Light control element 80 Third adhesive layer 90 Low-emissivity coating

Claims

1. A laminated glass comprising an outer glass sheet, an inner glass sheet, a functional coating layer, and a functional film, the functional film is located between the outer glass sheet and the inner glass sheet, The functional coating layer is coated on a surface of the outer glass sheet, a surface of the inner glass sheet, or a surface of the functional film, The functional coating layer is obtained by curing a functional paint, The functional coating layer is capable of absorbing infrared and / or ultraviolet rays, The thickness of the functional coating layer is 3 μm-20 μm, The functional film includes at least two resin films alternately laminated together, The visible light transmittance of the functional film is 70% or more. The laminated glass is characterized by the above.

2. 2. The laminated glass according to claim 1, wherein the functional film has a thickness of 50 μm to 200 μm.

3. The laminated glass has a visible light transmittance of 70% or more and a solar heat gain coefficient of 45% or less. The laminated glass according to claim 1 .

4. The laminated glass has a visible light transmittance of 55% or less and a solar heat gain coefficient of 40% or less. The laminated glass according to claim 1 .

5. The laminated glass has a visible light transmittance of 10% or less and a solar heat gain coefficient of 30% or less. The laminated glass according to claim 1 .

6. The laminated glass has a visible light transmittance of 5% or less and a solar heat gain coefficient of 20% or less. The laminated glass according to claim 1 .

7. The laminated glass further includes a light control element located between the functional film and the inner glass sheet, and the light control element includes one of a PDLC light control film, an SPD light control film, or an EC light control film; The laminated glass according to any one of claims 4 to 6,

8. The laminated glass further includes at least one adhesive layer located between the outer glass sheet and the inner glass sheet, and the material of the adhesive layer includes one or a combination of two or more of PVB, PU, ​​SGP, and EVA. The laminated glass according to claim 1 ,

9. The laminated glass includes at least two adhesive layers located between an outer glass sheet and a functional film and between an inner glass sheet and a functional film, and the adhesive layer located between the outer glass sheet and the functional film has a visible light transmittance of 80% or more. The laminated glass according to claim 8 .

10. The functional film has an infrared reflectance of 35% or more, the functional film includes 50 to 5000 resin films alternately laminated, and the difference in refractive index between adjacent resin films is 0.05 or more. The laminated glass according to claim 1 .

11. 2. The laminated glass according to claim 1, wherein raw materials of the functional coating material include a chelating agent, a silica sol, a transparent resin, and an infrared absorbing agent.

12. 12. The laminated glass according to claim 11, wherein a mass ratio of the chelating agent, the silica sol, the transparent resin, and the infrared absorbing agent is (5-20):100:(20-40):(1-15).

13. The laminated glass according to claim 11 , wherein the raw material of the chelating agent comprises an ultraviolet absorbing agent.

14. The raw material of the chelating agent further includes a first catalyst, a first coupling agent, and a first solvent, and in the raw material of the chelating agent, a mass ratio of the ultraviolet absorber, the first catalyst, the first coupling agent, and the first solvent is (1-30):(0.01-1):(10-30):(40-60); The laminated glass according to claim 13 .

15. The silica sol raw material contains a silicate, a second catalyst, a second coupling agent, a second solvent, and water, and in the silica sol raw material, the mass ratio of the silicate, the second catalyst, the second coupling agent, the second solvent, and the water is (15-35):(0.01-1):(5-15):(30-60):(10-30). The laminated glass according to claim 11 .

16. 12. The laminated glass according to claim 11, wherein the transparent resin comprises an epoxy resin.

17. The infrared absorbing agent is ITO, FTO, WO ３ , CsxWO ３ , ATO and doped VO ２ The laminated glass according to claim 11, characterized in that the nanoparticles are transparent conductive oxides containing one or a combination of two or more of the above.

18. the laminated glass has a first vertical radius of curvature; the preformed functional film has a second perpendicular radius of curvature that is 40%-100% of the first perpendicular radius of curvature; The preforming process is a process of laying a functional film on a curved glass sheet, and further coating a functional paint on the surface of the functional film and thermally curing the functional paint before forming the laminated glass, The surface of the functional film after preforming has a functional coating layer; The laminated glass according to claim 1 .

19. The outer glass plate is a transparent glass having a visible light transmittance of 70% or more, or a colored glass having a visible light transmittance of 70% or more, The inner glass plate is a transparent glass having a visible light transmittance of 70% or more, or a colored glass having a visible light transmittance of 70% or more. The laminated glass according to claim 1 .

20. The laminated glass further includes a low-emissivity coating disposed on a surface of the inner glass sheet adjacent to the interior of the vehicle, the low-emissivity coating including at least one transparent conductive oxide layer; The laminated glass has an emissivity of 0.01-0.25 measured from the inside of the vehicle.

20. The laminated glass according to claim 1 ,

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