An anti-glare coating liquid and an anti-glare film

Abstract

The present application relates to the field of photocuring coating, in particular to a kind of anti-glare coating fluid for high-precision anti-glare coating and a kind of anti-glare film.To solve the problem of poor definition of existing anti-glare film, the present application provides an anti-glare coating fluid and an anti-glare film.The anti-glare coating fluid includes the following components by weight: polyurethane acrylate oligomer 30-50 parts, acrylate monomer 10-20 parts, solvent 24.5-50 parts, photoinitiator 0.5-1.5 parts, leveling agent 0.3-1.0 parts, low-density anti-glare particles 1.0-2.5 parts, crystallization promoter 1.0-2.5 parts.The anti-glare coating fluid is a kind of coating fluid for high-precision anti-glare coating.The anti-glare film is a high-precision anti-glare film.

Description

Technical Field

[0001] This invention relates to the field of photocurable coatings, specifically to an anti-glare liquid for high-precision anti-glare coatings and an anti-glare film. Background Technology

[0002] With the increasing prevalence of electronic devices, if external light does not diffuse properly across the screen, severe reflections occur, resulting in poor image clarity and making it difficult to see the image. This significantly impacts the viewing experience. While ordinary anti-glare films can effectively diffuse light evenly, their application to electronic device screens can drastically reduce display clarity and introduce flickering issues. Therefore, optical film manufacturers have developed high-precision anti-glare films that combine anti-glare properties with high definition for electronic displays. Current manufacturing techniques for high-precision anti-glare films primarily involve adding particles (usually SiO2 particles) to the base resin to adjust both external and internal light diffusion, thus achieving a balance between anti-glare and high definition.

[0003] However, adding particles to the resin has problems such as difficulty in particle dispersion, easy precipitation, and easy agglomeration, which greatly affects the appearance of the film. In addition, to achieve extremely high anti-glare clarity and virtually no flash point by adding microparticles, the haze of the coating must reach more than 60%. Summary of the Invention

[0004] To address the problem of poor display clarity in existing anti-glare films, this invention provides an anti-glare coating liquid and an anti-glare film. The anti-glare coating liquid is a liquid used for high-precision anti-glare coatings. The anti-glare film is a high-precision anti-glare film. A high-precision anti-glare film refers to an anti-glare film with acceptable or excellent display clarity.

[0005] To solve this technical problem, the present invention provides the following technical solution:

[0006] This invention provides an anti-glare coating liquid, comprising the following components: 30-50 parts of polyurethane acrylate oligomer, 10-20 parts of acrylate monomer, 24.5-50 parts of solvent, 0.5-1.5 parts of photoinitiator, 0.3-1.0 parts of leveling agent, 1.0-2.5 parts of low-density anti-glare particles, and 1.0-2.5 parts of crystallization promoter. The parts are by weight. The total weight of the aforementioned components is 100 parts.

[0007] Furthermore, the anti-glare coating liquid comprises the following components in parts by weight: 40-50 parts of polyurethane acrylate oligomer, 10-20 parts of acrylate monomer, 24.5-43.7 parts of solvent, 0.8-1.5 parts of photoinitiator, 0.5-1.0 parts of leveling agent, 1.5-2.5 parts of low-density anti-glare particles, and 1.5-2.5 parts of crystallization promoter. The total weight of the aforementioned components is 100 parts. The aforementioned technical solution includes Examples 2-4.

[0008] Furthermore, the polyurethane acrylate oligomer is selected from one of trifunctional, tetrafunctional, pentafunctional, or hexafunctional polyurethane acrylate oligomers. Furthermore, the molecular weight Mn of the soft segment in the oligomer is 2000-3000, and the molecular weight Mn of the hard segment is 500-700, with the hard segment containing a rigid structure.

[0009] Furthermore, the acrylate monomer is selected from one of dipropylene glycol diacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, or pentaerythritol tetraacrylate.

[0010] Furthermore, the solvent is one of butanone, propylene glycol methyl ether, or methyl isobutyl ketone.

[0011] Furthermore, the photoinitiator is one of photoinitiator 184, photoinitiator 819, photoinitiator TPO, or photoinitiator azobenzoyl.

[0012] Furthermore, the leveling agent is one of BYK-333, BYK-354, BYK-320, BYK-323, BYK-321, or BYK-380.

[0013] Furthermore, the low-density anti-glare particles are one of polyolefin microspheres, PMMA microspheres, PA microspheres, and hollow SiO2 microspheres. Furthermore, the particle size of the low-density anti-glare particles is 2-3 μm. Furthermore, the low-density anti-glare particles are hollow SiO2 microspheres with a density of 1.3-1.6 g / cm³. 3 The aforementioned hollow SiO2 microspheres are also known as low-density SiO2 hollow particles.

[0014] Furthermore, the low-density anti-glare particles are hollow SiO2 microspheres, which are treated with a silane coupling agent. The silane coupling agent is selected from one or a combination of at least two of di-n-butyldimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, or ethyldimethoxysilane. During the treatment, the hollow SiO2 microspheres are added to a solvent, and the silane coupling agent is added to the solvent, followed by reflux heating. The solvent is a mixture of ethanol and deionized water, with a mass ratio of ethanol to deionized water of 1:1. The mass ratio of hollow SiO2 microspheres to solvent is 1:150-1:200. The amount of silane coupling agent used is 1%-6% of the mass of the hollow SiO2 microspheres, where the percentage is by mass. The treatment time is 3-4 hours, and the reflux temperature is 70-90°C. Finally, the product is subjected to multiple filtrations and washing with anhydrous alcohol to obtain modified hollow SiO2 microspheres.

[0015] Furthermore, the mass ratio of hollow SiO2 microspheres to solvent is 1:170-1:200; the amount of silane coupling agent is 3%-6% of the mass of hollow SiO2 microspheres, where the percentage is by mass; the processing time is 3-4 hours, and the reflux temperature is 80-90°C. The aforementioned technical solutions include Examples 2-4.

[0016] Furthermore, the hollow SiO2 microspheres need to be treated with a silane coupling agent. The hollow SiO2 microspheres need to be treated with one of di-n-butyldimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, or ethyldimethoxysilane. The solvent is an ethanol / deionized water mixture (mass ratio 1:1). The mass ratio of particles (i.e., hollow SiO2 microspheres) to the mixture is 1:150-1:200. The amount of silane coupling agent is 1%-6% of the particle mass fraction. The treatment time is 3-4 hours, and the reflux temperature is 70-90℃.

[0017] Furthermore, the crystallization promoter is one of octadecyl alcohol, stearic anhydride ester, or γ-butyrolactone.

[0018] On the other hand, the present invention also provides an anti-glare film, which includes a substrate and an anti-glare coating. The anti-glare coating is formed by curing the anti-glare coating liquid provided by the present invention. The anti-glare coating is adhered to the surface of the substrate. The substrate is also referred to as a base film or base film layer.

[0019] The method for preparing the anti-glare film provided by this invention is as follows: an anti-glare coating liquid is applied to a base film layer, dried at 70-85℃ for 2-3 minutes, and finally cured by a high-pressure mercury lamp with a curing energy of 400-600 mJ / cm². 2 This yields an anti-glare film.

[0020] Furthermore, the substrate is one of PET, TAC, or PMMA, with a thickness of 75μm-188μm. Furthermore, the thickness of the anti-glare coating is 3μm-6μm.

[0021] Furthermore, the thickness of the substrate is 100μm-188μm. Furthermore, the thickness of the anti-glare coating is 4μm-6μm.

[0022] Compared with the prior art, the present invention has the following advantages:

[0023] 1. Under the action of crystallization promoter, some hard segments and soft segments of polyurethane are regularly arranged to form crystalline micro-regions. These micro-phases have very small sizes, which are incomparable to organic or inorganic particles. The refractive index of these micro-regions is very different from that of amorphous regions.

[0024] 2. Under the action of crystallization promoter, the polyurethane hard segment micro-regions formed are distributed in the polyurethane soft phase, which act as physical cross-linking points. When the material is subjected to force, the force is evenly distributed to the surrounding molecular chains through the cross-linking points, thereby enhancing the material's ability to resist external forces.

[0025] 3. The low-density anti-glare particles undergo surface modification, resulting in good dispersibility and resistance to sedimentation. The combined effect of the particles and the crystalline micro-regions not only achieves the anti-glare function but also possesses excellent properties such as low flash point, high clarity (as shown in the images in Table 1), and good wear resistance. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the high-precision anti-glare film provided by the present invention. Detailed Implementation

[0027] To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

[0028] like Figure 1 As shown, the high-precision anti-glare film provided by the present invention includes a substrate 1 and an anti-glare layer 2. The anti-glare layer 2 is composed of crystalline micro-regions 3, low-density anti-glare particles 4, and photocurable resin 5. The crystalline micro-regions impart good inner fog to the anti-glare layer, and the low-density anti-glare particles impart good outer fog to the anti-glare layer.

[0029] The method for preparing the anti-glare film provided by the present invention is as follows: a high-precision coating liquid is applied to a substrate, the coating is dried at 85°C for 2 minutes, and then the dried coating is cured by ultraviolet rays from a high-pressure mercury lamp to obtain a high-precision anti-glare film.

[0030] The performance of the high-precision anti-glare film provided by this invention was tested according to the following method:

[0031] (1) Haze, total light transmittance

[0032] The haze was measured using a Japanese Densho NDH2000N haze meter via the transmitted light method.

[0033] (2) Pencil hardness

[0034] The hardness of the product pencil was measured using an Elcometer 3086 pencil hardness tester. Measurement method: Using a Mitsubishi pencil with a hardness of H to 9H, five lines were drawn under a 750g load. 0-1 scratches indicate a pass at that hardness; 2-5 scratches indicate a fail. This invention records the maximum hardness that the coating film can pass.

[0035] (3) Abrasion resistance

[0036] Using Kunshan Jingjia Instruments A20-339 steel wool resistance testing machine at 1000 gf / cm 2 Under a load of 1kg, #0000 steel wool is used to rub back and forth on the anti-glare coating surface to test the limit number of times the film surface will be scratched. The higher the limit number, the better the wear resistance.

[0037] (4) Flash point performance

[0038] The anti-glare film is closely attached to a pure green background. The size of the luminescent particles is observed using an electron microscope, and the determination is made according to the following criteria.

[0039] Judgment criteria

[0040] If the average diameter of the luminescent particles is ≥3μm, it is marked as "×" (poor).

[0041] The average diameter of the luminescent particles is 1-3 μm, denoted as "△" (general).

[0042] The average diameter of the luminescent particles is ≤1μm, which is rated as "◎" (excellent).

[0043] (5) Bending resistance test

[0044] Using the Suzhou Feitang Testing FT-6500 flexible OLED bending tester, the OLED was bent 180° three times with the anti-glare coating facing outwards. The condition of fine cracks on the surface of the anti-glare coating was observed, and an evaluation was conducted according to the following standards:

[0045] No cracks or fissures were found, marked as "◎" (qualified);

[0046] Cracks or fissures are marked as "×" (unacceptable).

[0047] (6) Image display clarity

[0048] The prepared anti-glare film was applied to a smartphone with an organic EL display of 315 ppi resolution, evaluated visually, and assessed according to the following criteria:

[0049] If a character appears blurry, mark it as "×" (poor);

[0050] The characters appear slightly blurry; this is marked as "△" (normal).

[0051] If the characters are not perceived as blurry, mark it as "◎" (Excellent).

[0052] (7) Anti-glare

[0053] The test was conducted using a Shenzhen Sanenshi Technology HG60 gloss meter. When the gloss level is greater than 90°, the anti-glare performance of the film surface appears poor to the naked eye; the lower the gloss level, the better the anti-glare effect.

[0054] Anti-glare performance is characterized by gloss. Good anti-glare performance does not necessarily mean low flash point. Low flash point effect only occurs when the particle size of the anti-glare film is close to the pixel size of the display.

[0055] Example 1

[0056] Low-density SiO2 hollow microspheres were dried in an electrically heated oven at 100°C for 24 hours (H represents hours). The required amount of microspheres, a mixture of anhydrous ethanol and deionized water prepared at a mass ratio of 1:1, and silica (i.e., low-density SiO2 hollow microspheres) at a mass ratio of 1:150 were poured into a flask and ultrasonically dispersed for 1 hour before being transferred to a three-necked flask. A certain amount of γ-methacryloyloxypropyltrimethoxysilane (1% of the mass of the low-density SiO2 hollow particles) was added dropwise to the three-necked flask, and the mixture was refluxed at 75°C for 4 hours. Finally, the product was subjected to multiple filtrations and washing with anhydrous ethanol to obtain modified low-density SiO2 hollow particles (i.e., low-density SiO2 hollow microspheres).

[0057] A high-precision photocurable coating solution was prepared by mixing 30 parts by weight of trifunctional polyurethane acrylate oligomer, 17.2 parts by weight of dipropylene glycol diacrylate, 50 parts by weight of propylene glycol methyl ether, 0.5 parts by weight of photoinitiator 184, 1.0 part by weight of octadecyl alcohol, 0.3 parts by weight of leveling agent BYK-333, and 1.0 part by weight of modified low-density SiO2 hollow microspheres. The above photocurable composition (i.e., the photocurable coating solution) was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 75 micrometers. After drying the formed coating at 70°C for 2 minutes, it was subjected to a curing process at 400 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 3μm.

[0058] Example 2

[0059] Low-density SiO2 hollow microspheres were dried in an electrically heated oven at 100°C for 24 hours (H represents hours). The required amount of microspheres was mixed with anhydrous ethanol and deionized water at a mass ratio of 1:1 (SiO2 hollow microspheres to the mixture mass ratio was 1:170). This mixture was then ultrasonically dispersed in a flask for 1 hour and transferred to a three-necked flask. A certain amount of di-n-butyldimethoxysilane (3% of the mass of the low-density SiO2 hollow particles) was added dropwise to the three-necked flask, and the mixture was refluxed at 80°C for 4 hours. Finally, the product was subjected to multiple filtrations and washing with anhydrous ethanol to obtain modified low-density SiO2 hollow particles.

[0060] A high-precision photocurable coating solution was prepared by mixing 42 parts by weight of a tetrafunctional polyurethane acrylate oligomer, 10 parts by weight of pentaerythritol triacrylate, 43.7 parts by weight of propylene glycol methyl ether, 0.8 parts by weight of photoinitiator 184, 1.5 parts by weight of γ-butyrolactone, 0.5 parts by weight of leveling agent BYK-333, and 1.5 parts by weight of modified low-density SiO2 hollow microspheres. The above photocurable composition (i.e., the photocurable coating solution) was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 100 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a curing temperature of 500 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 4μm.

[0061] Example 3

[0062] Low-density SiO2 hollow microspheres were dried in an electrically heated oven at 100°C for 24 hours. The required amount of microspheres were mixed with anhydrous ethanol and deionized water at a mass ratio of 1:1 (SiO2 to the mixture mass ratio was 1:180). This mixture was poured into a flask, ultrasonically dispersed for 1 hour, and then transferred to a three-necked flask. A certain amount of ethyldimethoxysilane (4% of the mass of the low-density SiO2 hollow particles) was added dropwise to the three-necked flask, and the mixture was refluxed at 90°C for 3 hours. Finally, the product was subjected to multiple filtrations and washing with anhydrous ethanol to obtain modified low-density SiO2 hollow particles.

[0063] A photocurable coating solution was prepared by mixing 40 parts by weight of a five-functional polyurethane acrylate oligomer, 20 parts by weight of trimethylolpropane triacrylate, 34.2 parts by weight of propylene glycol methyl ether, 1.0 part by weight of photoinitiator 184, 2.0 parts by weight of γ-butyrolactone, 0.8 parts by weight of leveling agent BYK-333, and 2.0 parts by weight of modified low-density SiO2 hollow microspheres. The above photocurable composition was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 125 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a curing process at 600 mJ / cm². 2The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 6μm.

[0064] Example 4

[0065] Low-density SiO2 hollow microspheres were dried in an electrically heated oven at 100°C for 24 hours. The required amount of microspheres were mixed with anhydrous ethanol and deionized water at a mass ratio of 1:1 (SiO2 to the mixture mass ratio was 1:200). This mixture was poured into a flask, ultrasonically dispersed for 1 hour, and then transferred to a three-necked flask. A certain amount of γ-methacryloyloxypropyltrimethoxysilane (6% of the mass of the low-density SiO2 hollow particles) was added dropwise to the three-necked flask, and the mixture was refluxed at 90°C for 4 hours. Finally, the product was subjected to multiple filtrations and washing with anhydrous ethanol to obtain modified low-density SiO2 hollow particles.

[0066] A high-precision photocurable coating solution was prepared by mixing 50 parts by weight of a hexafunctional polyurethane acrylate oligomer, 18 parts by weight of trimethylolpropane triacrylate, 24.5 parts by weight of propylene glycol methyl ether, 1.5 parts by weight of photoinitiator 184, 2.5 parts by weight of octadecyl alcohol, 1.0 part by weight of leveling agent BYK-333, and 2.5 parts by weight of modified low-density SiO2 hollow microspheres. The above photocurable composition was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 188 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a curing temperature of 600 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 6μm.

[0067] Comparative Example 1

[0068] Low-density SiO2 hollow microspheres were dried in an electrically heated oven at 100°C for 24 hours. The required amount of microspheres were mixed with anhydrous ethanol and deionized water at a mass ratio of 1:1 (SiO2 to the mixture mass ratio was 1:200). This mixture was poured into a flask, ultrasonically dispersed for 1 hour, and then transferred to a three-necked flask. A certain amount of ethyldimethoxysilane (5% of the mass of the low-density SiO2 hollow particles) was added dropwise to the three-necked flask, and the mixture was refluxed at 90°C for 4 hours. Finally, the product was subjected to multiple filtrations and washing with anhydrous ethanol to obtain modified low-density SiO2 hollow particles.

[0069] A high-precision photocurable coating solution was prepared by mixing 48 parts by weight of a hexafunctional polyurethane acrylate oligomer, 15 parts by weight of pentaerythritol tetraacrylate, 28.3 parts by weight of propylene glycol methyl ether, 1.2 parts by weight of photoinitiator 184, 3.0 parts by weight of stearic anhydride ester, 1.5 parts by weight of leveling agent BYK-333, and 3.0 parts by weight of modified low-density SiO2 hollow microspheres. The above photocurable composition was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 188 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a curing temperature of 600 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 6μm.

[0070] Comparative Example 2

[0071] Low-density SiO2 hollow microspheres were dried in an electrically heated oven at 100°C for 24 hours. The required amount of microspheres were mixed with anhydrous ethanol and deionized water at a mass ratio of 1:1 (SiO2 to the mixture mass ratio was 1:165). This mixture was poured into a flask, ultrasonically dispersed for 1 hour, and then transferred to a three-necked flask. A certain amount of γ-methacryloyloxypropyltrimethoxysilane (6% of the mass of the low-density SiO2 hollow particles) was added dropwise to the three-necked flask, and the mixture was refluxed at 85°C for 4 hours. Finally, the product was subjected to multiple filtrations and washing with anhydrous ethanol to obtain modified low-density SiO2 hollow particles.

[0072] A high-precision photocurable coating solution was prepared by mixing 46 parts by weight of a tetrafunctional polyurethane acrylate oligomer, 10 parts by weight of pentaerythritol tetraacrylate, 39 parts by weight of propylene glycol methyl ether, 1.0 part by weight of photoinitiator 184, 1.0 part by weight of leveling agent BYK-333, and 3.0 parts by weight of modified low-density SiO2 hollow microspheres. The above photocurable composition was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 125 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a curing temperature of 600 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 6μm.

[0073] Compared with the technical solution provided by the present invention, the anti-glare liquid composition (i.e., high-precision photocurable coating liquid) provided in Comparative Example 2 is different in that it does not contain a crystallization promoter and there are no crystallization micro-regions in the anti-glare layer.

[0074] Comparative Example 3

[0075] A high-precision photocurable coating solution was prepared by mixing 37.5 parts by weight of a five-functional polyurethane acrylate oligomer, 12 parts by weight of pentaerythritol tetraacrylate, 42.3 parts by weight of propylene glycol methyl ether, 1.5 parts by weight of photoinitiator 184, 2.5 parts by weight of octadecyl alcohol, 1.2 parts by weight of leveling agent BYK-333, and 3.0 parts by weight of SiO2 hollow microspheres. The above photocurable composition was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 125 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a curing process at 600 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 6μm.

[0076] Compared with the technical solution provided by the present invention, the difference of the anti-glare liquid composition provided in Comparative Example 3 is that the SiO2 hollow microspheres have not been modified with siloxane.

[0077] Comparative Example 4

[0078] A high-precision photocurable coating solution was prepared by mixing 42 parts by weight of a hexafunctional polyurethane acrylate oligomer, 14 parts by weight of pentaerythritol tetraacrylate, 37.6 parts by weight of propylene glycol methyl ether, 0.8 parts by weight of photoinitiator 184, 2 parts by weight of sodium stearate, 0.6 parts by weight of leveling agent BYK-333, and 3.0 parts by weight of PMMA microspheres KMR-3EA. The above photocurable composition was coated onto one side of an optical-grade polyethylene terephthalate film with a thickness of 188 micrometers. After drying the formed coating at 85°C for 2 minutes, it was subjected to a pressure of 600 mJ / cm². 2 The amount of light is used to cure the dried coating with a high-pressure mercury lamp to obtain an anti-glare layer with a coating thickness of 6μm.

[0079] Compared with the technical solution provided by the present invention, the difference of the anti-glare liquid composition provided in Comparative Example 4 is that the modified SiO2 hollow microspheres are replaced with PMMA microspheres.

[0080] Table 1. Main performance test results of the anti-glare films provided in Examples 1-4 and Comparative Examples 1-4

[0081]

[0082] Table 1 shows that the amount of hollow SiO2 microspheres and the amount of crystallization promoter directly affect the optical properties and wear resistance of the anti-glare film. With increasing amounts of particles and crystallization promoter, the haze of the anti-glare film gradually increases. Increasing the amount of anti-glare particles can improve the wear resistance of the anti-glare film, but if the amount is too high, the wear resistance of the anti-glare film will decrease. This is because the surface roughness of the film increases significantly at this point, with a large number of protruding particles on the film surface. These particles are directly worn down, leading to a decrease in the wear resistance of the anti-glare film.

[0083] The data comparison in Table 1 shows that the anti-glare film prepared by adding unmodified hollow SiO2 microspheres has poor flash point performance. This is because the refractive index of the particles differs greatly from that of the matrix resin, causing a large deflection of light and resulting in different light intensities, which easily leads to flash point formation.

[0084] The high-precision anti-glare film provided by this invention has advantages such as good wear resistance, low flash point, and high display clarity. The high-precision anti-glare film provided in Examples 2-4 of this invention has even better overall performance.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. All equivalent variations and modifications made according to the content of the present invention are covered within the scope of the present invention.

Claims

1. An anti-glare coating liquid, characterized in that, The anti-glare coating liquid is composed of the following components: 40 parts by mass of pentafunctional polyurethane acrylate oligomer, 20 parts by mass of trimethylolpropane triacrylate, 34.2 parts by mass of propylene glycol methyl ether, 1.0 part by mass of photoinitiator 184, 2.0 parts by mass of crystallization accelerator, 0.8 parts by mass of leveling agent BYK-333, and 2.0 parts by mass of low-density anti-glare particles with a particle size of 2-3 µm; the crystallization accelerator is γ-butyrolactone; the low-density anti-glare particles are modified low-density SiO2 hollow microspheres; the modified low-density SiO2 hollow microspheres are obtained by modifying low-density SiO2 hollow microspheres with a silane coupling agent, and the density of the low-density SiO2 hollow microspheres is 1.3-1.6 g / cm³. 3 The silane coupling agent is one of di-n-butyldimethoxysilane, γ-methacryloyloxypropyltrimethoxysilane, or ethyldimethoxysilane.

2. The anti-glare coating liquid according to claim 1, characterized in that, In the silane coupling agent modification process, low-density SiO2 hollow microspheres were dried in an electric heating oven at 100℃ for 24 hours; the required amount of low-density SiO2 hollow microspheres were taken, and a mixture of anhydrous ethanol and deionized water was prepared at a mass ratio of 1:1, with the mass ratio of low-density SiO2 hollow microspheres to the mixture being 1:

180. The mixture was then poured into a flask, ultrasonically dispersed for 1 hour, and then poured into a three-necked flask; ethyl dimethoxysilane, with a mass of 4% of the mass of low-density SiO2 hollow microspheres, was added dropwise to the three-necked flask, and the mixture was refluxed at 90℃ for 3 hours. The product was filtered and washed with anhydrous alcohol to obtain modified low-density SiO2 hollow microspheres.

3. An anti-glare film, characterized in that, The anti-glare film includes a substrate and an anti-glare coating, which is formed by curing the anti-glare coating liquid as described in claim 1 or 2.

4. The anti-glare film according to claim 3, characterized in that, The substrate is one of PET, TAC, or PMMA, with a thickness of 75µm-188µm; the anti-glare coating has a thickness of 3µm-6µm.

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