Antiglare composition, antiglare film, polarizing sheet, and display device

Abstract

The embodiment of the present application provides a kind of anti-glare composition, anti-glare film, polarizer and display device, including resin and surface modified microparticle, surface modified microparticle includes first microparticle, second microparticle and hydrophobic modification group, hydrophobic modification group is connected with first microparticle and second microparticle simultaneously by chemical bond, the particle size of first microparticle is greater than the particle size of second microparticle.One aspect of the surface of surface modified microparticle reduces, when preparing anti-glare film, modified microparticle will gather to the surface of film, and the first microparticle of large particle size will form continuous concave-convex surface, which can effectively achieve the effect of anti-glare, on the other hand, the second microparticle of small particle size is gathered around the first microparticle of large particle size by chemical bond, because the particle hardness of second microparticle of small particle size is high, it is difficult to be extruded and destroyed structure by external force, thus having excellent wear resistance.

Description

Technical Field

[0001] This application relates to the field of display technology, specifically to an anti-glare composition, an anti-glare film, a polarizer, and a display device. Background Technology

[0002] In liquid crystal display panels, to reduce glare caused by external light, an anti-glare treatment is required on the panel surface to eliminate shadows and reduce reflected light. Typically, an anti-glare resin film is applied to the panel surface, with large-particle inorganic silica particles added to the resin to create a finely textured surface.

[0003] In the process of researching and practicing the prior art, the inventors of this application discovered that because the surface of inorganic silicon oxide particles is rich in hydroxyl groups and has very high surface energy, after being mixed with resin, the inorganic silicon oxide particles tend to be evenly distributed inside the resin layer and cannot aggregate to the surface, thus failing to form a complete micro-uneven surface, resulting in poor anti-glare performance. At the same time, the larger particle size leads to poor wear resistance, which can cause the surface of the display panel to be easily scratched during use.

[0004] In summary, existing anti-glare resin films need improvement. Summary of the Invention

[0005] This application provides an anti-glare composition, an anti-glare film, a polarizer, and a display device to solve the technical problem of poor wear resistance of existing anti-glare films.

[0006] This application provides an anti-glare composition comprising a resin and surface-modified microparticles. The surface-modified microparticles include a first microparticle, a second microparticle, and a hydrophobic modifying group. The hydrophobic modifying group is connected to both the first and second microparticles by chemical bonds. The particle size of the first microparticle is larger than that of the second microparticle.

[0007] In some embodiments of this application, the first particle and the second particle include silicon oxide particles, the first particle having a particle size of 1 to 10 μm and the second particle having a particle size of 10 to 100 nm.

[0008] In some embodiments of this application, the structural formula of the surface-modified microparticles is as follows:

[0009]

[0010] In some embodiments of this application, the anti-glare composition comprises the following components in amounts based on 100 parts by weight of the resin:

[0011] 100 parts of the resin;

[0012] The surface-modified microparticles are 5-25 parts;

[0013] 5-30 parts of reactive monomers; and

[0014] Initiator 1-10 parts;

[0015] In some embodiments of this application, the surface-modified microparticles form a cross-linked network structure with the resin and / or the reactive monomer.

[0016] In some embodiments of this application, the resin includes at least one of polyester acrylate resin, polyurethane acrylate resin, epoxy acrylate resin, and polysilsesquioxane resin;

[0017] And / or, the reactive monomers include at least one of the following: trimethylolpropane tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, glycerol tri(meth)acrylate, pentaerythritol tri(meth)acrylate, di(trimethylolpropane)tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, di(trimethylolpropane)tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and di(trimethylolpropane) hexa(meth)acrylate;

[0018] And / or, the initiator includes acetophenones such as 4-phenoxydichloroacetophenone, 4-tert-butyldichloroacetophenone, 4-tert-butyltrichloroacetophenone, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropanone, 1(4-isopropylphenyl)-2-hydroxy-2-methylpropanone, 1(4-dodecylphenyl)-2-hydroxy-2-methylpropanone, 4-(2-hydroxyethoxy)phenyl(2-hydroxy-2-propyl)one, 1-hydroxycyclohexylphenylone, benzoin, benzoin methyl Ethers, benzoin ethyl ether, benzyl dimethyl ketal, acylphosphine oxide, titanium cephalodecene compounds, benzophenones such as benzophenone, benzoylbenzoic acid, benzoylbenzoic acid methyl ether, 4-phenylbenzophenone, hydroxybenzophenone, 4-benzoyl 4'-methyl diphenyl sulfide, 3,3'-dimethyl 4-methoxybenzophenone, etc., thioxanone, 2-chlorothioxanone, 2-methylthioxanone, 2,4-dimethylthioxanone, and at least one of isopropylthioxanone.

[0019] This application also provides an anti-glare film, including a substrate and an anti-glare layer disposed on the substrate, wherein the anti-glare layer includes the anti-glare composition described in any of the above embodiments, and the anti-glare layer includes an uneven surface.

[0020] This application also provides a polarizer, including a polarizing layer and an anti-glare film disposed on one side of the light-emitting surface of the polarizing layer, wherein the anti-glare film is the anti-glare film described in any of the above embodiments.

[0021] In some embodiments of this application, the polarizer includes a hard coating layer located on the light-emitting side of the polarizing layer, and the anti-glare film is reused as the hard coating layer.

[0022] This application also provides a display device, including a display panel and a polarizer located on one side of the light-emitting surface of the display panel, wherein the polarizer is the polarizer described in any of the above embodiments.

[0023] This application provides an anti-glare composition, an anti-glare film, a polarizer, and a display device, comprising a resin and surface-modified microparticles. The surface-modified microparticles include first microparticles, second microparticles, and hydrophobic modifying groups. The hydrophobic modifying groups are chemically bonded to both the first and second microparticles. The particle size of the first microparticle is larger than that of the second microparticle. By modifying the microparticles of the anti-glare composition, the large-diameter first microparticle and the small-diameter second microparticle are linked together using hydrophobic modifying groups. The hydrophobic modification of both types of microparticles reduces their surface energy. During the preparation of the anti-glare film, the modified microparticles aggregate towards the film surface, forming a continuous uneven surface from the large-diameter first microparticles, effectively achieving anti-glare. Furthermore, the small-diameter second microparticles aggregate around the large-diameter first microparticles through chemical bonds. Due to the high particle hardness of the small-diameter second microparticles, their structure is difficult to be damaged by external force, thus exhibiting excellent wear resistance. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the anti-glare film provided in the embodiments of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the polarizer provided in the embodiments of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] This application provides an anti-glare composition, an anti-glare film, a polarizer, and a display device. These are described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments. Furthermore, in the description of this application, the term "comprising" means "including but not limited to". The terms first, second, third, etc., are used merely as illustrative and do not impose numerical requirements or establish an order. Various embodiments of the present invention may exist in the form of a range; it should be understood that the description in the form of a range is merely for convenience and brevity and should not be construed as a rigid limitation on the scope of the invention; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single numerical values ​​within that range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and single numbers within the range, such as 1, 2, 3, 4, 5, and 6, regardless of the range. Additionally, whenever a numerical range is indicated herein, it means including any referenced number (fraction or integer) within the indicated range.

[0029] In some exemplary technologies, an anti-glare film with a finely textured surface is formed on the display surface. This textured surface is typically achieved by adding large-diameter microparticles to a resin film layer. Considering the light scattering effect caused by the difference in refractive index between the resin and the microparticles, inorganic silicon oxide microparticles are generally chosen. However, because the surface of inorganic silicon oxide microparticles is rich in hydroxyl groups and has very high surface energy, after being mixed with resin, the microparticles tend to be uniformly distributed inside the film layer and cannot aggregate to the surface, thus failing to form a continuous finely textured surface. This significantly reduces the anti-glare performance. Furthermore, due to the large particle size of the silicon oxide particles on the film surface, their wear resistance is also poor, making the display surface easily scratched during use.

[0030] To address the aforementioned deficiencies, this application provides an anti-glare composition, characterized in that it comprises a resin and surface-modified microparticles, wherein the surface-modified microparticles include a first microparticle, a second microparticle, and a hydrophobic modifying group, wherein the hydrophobic modifying group is connected to both the first and second microparticles by chemical bonds, and the particle size of the first microparticle is larger than that of the second microparticle.

[0031] This application embodiment modifies the microparticles of the anti-glare composition by using hydrophobic modifying groups to connect the large-diameter first microparticles and the small-diameter second microparticles. The two types of microparticles are hydrophobically modified. On the one hand, the surface energy of the surface-modified microparticles is reduced. When preparing the anti-glare film, the modified microparticles will aggregate to the surface of the film. The large-diameter first microparticles form a continuous uneven surface, which can effectively achieve the anti-glare effect. On the other hand, the small-diameter second microparticles aggregate around the large-diameter first microparticles through chemical bonds. Since the small-diameter second microparticles have high particle hardness, they are difficult to be crushed by external forces, thus exhibiting excellent wear resistance.

[0032] In some embodiments of this application, the refractive index of the resin is 1.4 to 1.6. In order to suppress the light scattering phenomenon caused by the particles and the resin, the smaller the difference in refractive index between the selected first and second particles and the resin, the better. In the embodiments of this application, the refractive indices of the first and second particles are also 1.4 to 1.6.

[0033] In some embodiments, the particle size of the first particle is 1–10 μm. Further, the particle size of the first particle is 3–6 μm. The particle size of the first particle can be 1 μm, 1.5 μm, 2 μm, 2.5 μm, 3 μm, 3.5 μm, 4 μm, 4.5 μm, 5 μm, 5.5 μm, 6 μm, 6.5 μm, 7 μm, 7.5 μm, 8 μm, 8.5 μm, 9 μm, 9.5 μm, or 10 μm.

[0034] In some embodiments, the particle size of the second particle is 10–100 nm. Further, the particle size of the second particle is 40–60 nm. Optionally, the particle size of the second particle can be 10 nm, 20 nm, 30 nm, 35 nm, 40 nm, 42 nm, 46 nm, 48 nm, 50 nm, 52 nm, 54 nm, 56 nm, 58 nm, 60 nm, 65 nm, 70 nm, 75 nm, 80 nm, 85 nm, 95 nm, or 100 nm.

[0035] By selecting the first and second particles with the above-mentioned particle size, it is possible to ensure that the large-diameter first particle forms an uneven surface, which provides better anti-glare effect, and to ensure that the small-diameter second particle has high hardness, so as to avoid the film being deformed by external force, thus obtaining good wear resistance.

[0036] In some embodiments, the surface-modified microparticles can be hydrophobically modified on the surfaces of the first and second microparticles by a silane coupling agent to reduce the surface energy of the first and second microparticles, causing the surface-modified microparticles to tend to aggregate on the film surface. The large-diameter first microparticles can form a continuous uneven surface, which plays an anti-glare role.

[0037] In some embodiments, the materials of the first and second particles may be the same or different. Optionally, both the first and second particles are selected from silicon oxide particles.

[0038] Furthermore, the hydrophobic modifying group contains multiple carbon-carbon double bonds, and the surface-modified particles containing these carbon-carbon double bonds can form a cross-linked network structure with the resin and / or reactive monomers in the anti-glare composition. Specifically, after chemical modification, the first and second particles form surface-modified particles. These surface-modified particles, containing multiple double bonds capable of free radical reactions, can react with the functional groups of the resin and / or reactive monomers to form a complete cross-linked network structure, further improving the film's hardness and abrasion resistance. Specifically, the resin or reactive monomer contains an acryloyloxy group, which reacts with the carbon-carbon double bonds to form a cross-linked network structure.

[0039] Specifically, in some embodiments, the structural formula of the surface-modified microparticles is shown in formula (1) below:

[0040]

[0041] In the above structural formula, the SiO2 on the left represents a large-diameter first particle, and the SiO2 on the right represents a large-diameter second particle. In other embodiments, the first and second particles may also be other types of particles. The structural formula of the hydrophobic group is as follows:

[0042]

[0043] In existing technologies, some silica microparticles are derived from silicic acid. The dehydration condensation of silicic acid to produce silica typically does not result in complete reaction, leading to the presence of hydroxyl groups on the silica surface. The presence of hydroxyl groups with varying bonding states on the silica surface results in a high surface energy. Hydrophobic modification of the first and second silica microparticles can be achieved using a silane coupling agent (3-aminopropyldimethylethoxysilane will be used as an example below) to reduce their surface energy. This allows larger-diameter first silica particles to aggregate towards the film surface, forming a continuous uneven structure.

[0044] Furthermore, the first and second silica particles after hydrophobic treatment are surface-treated with trimethylbenzene triisocyanate so that the first and second silica particles after hydrophobic treatment can be connected by chemical bonds.

[0045] Furthermore, by using pentaerythritol triacrylate to chemically bond the first and second silica particles that have undergone hydrophobic treatment, the resulting modified silica particles contain carbon-carbon double bonds, thereby enabling the surface-modified particles to form a cross-linked network structure with the resin.

[0046] Specifically, the formation mechanism of the surface-modified microparticles shown in equation (1) above is illustrated by the following reaction equations I, II, III, and IV:

[0047]

[0048]

[0049] Specifically, the preparation process of the surface-modified microparticles shown in formula (1) includes: S1, modifying the first silica microparticles containing hydroxyl groups on the surface with 3-aminopropyldimethylethoxysilane, as shown in reaction formula I; S2, modifying the second silica microparticles containing hydroxyl groups on the surface with 3-aminopropyldimethylethoxysilane, as shown in reaction formula II; S3, modifying the modified first silica microparticles and the modified second silica microparticles with tricresyl triisocyanate to connect the first silica microparticles and the second silica microparticles through chemical bonds, as shown in reaction formula III; S4, modifying the first silica microparticles and the second silica microparticles connected by chemical bonds with pentaerythritol triacrylate to obtain surface-modified microparticles containing carbon-carbon double bonds, as shown in reaction formula IV.

[0050] In S1, silica particles with a particle size of 1–10 μm are mixed with HCl (hydrochloric acid), ultrapure water (water with a resistivity of 18 MΩ*cm (25℃)) and tetrahydrofuran, and ultrasonically dispersed for 0.5–1.5 hours; then 3-aminopropyldimethylethoxysilane is added, and an inert gas is introduced, and the mixture is stirred at 55–65℃ for 20–26 hours to obtain a mixture; the mixture is separated into a colorless aqueous phase and a turbid organic phase containing the product; the organic phase is subjected to evaporation, extraction, drying, and filtration to obtain an oily product, which is the product of reaction formula I.

[0051] The specific steps of S2 are similar to those of S1, except that the particle size of the second silica particles is 10–100 nm.

[0052] In S3, the products prepared in S1 and S2 are mixed with trimethylbenzene triisocyanate, tetrahydrofuran, dibutyltin dilaurate, and p-hydroxyanisole. An inert gas is introduced, and the mixture is stirred at 35–45°C for 4–6 hours to obtain the product shown in reaction formula III.

[0053] In S4, the product prepared in S3 is mixed with pentaerythritol triacrylate, tetrahydrofuran, dibutyltin dilaurate, and p-hydroxyanisole. An inert gas is introduced, and the mixture is stirred at 35–45°C for 4–6 hours to obtain the product shown in reaction formula III.

[0054] In the embodiments of this application, the anti-glare composition comprises, based on 100 parts by weight of resin: 100 parts of resin, 5 to 25 parts of surface-modified microparticles, 5 to 30 parts of reactive monomers, and 1 to 10 parts of photoinitiator.

[0055] In some embodiments, the resin may be a photocurable resin. The resin has a functionality greater than or equal to 5; higher functionality allows for the formation of a network structure with greater crosslinking density between the resin and the surface-modified microparticles, thereby improving mechanical properties.

[0056] The resin includes, but is not limited to, at least one of polyester acrylate resin, polyurethane acrylate resin, epoxy acrylate resin, and polysilsesquioxane resin.

[0057] In some embodiments, the reactive monomer may be a photocurable monomer. The functionality of the reactive monomer is greater than or equal to 3. Higher functionality allows for the formation of a network structure with greater crosslinking density between the resin formed after polymerization of the reactive monomer and the surface-modified microparticles, thereby improving mechanical properties.

[0058] The reactive monomer may be a trifunctional (meth)acrylate, including but not limited to at least one of trimethylolethane trimethacrylate, trimethylolpropane trimethacrylate, glycerol trimethacrylate, pentaerythritol trimethacrylate, di(trimethylolpropane) trimethacrylate, and dipentaerythritol trimethacrylate.

[0059] The reactive monomer may be a polyfunctional (meth)acrylate with more than one of the following: pentaerythritol tetra(meth)acrylate, di(trimethylolpropane)tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, di(trimethylolpropane) penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and di(trimethylolpropane) hexa(meth)acrylate.

[0060] In some embodiments, the initiator may be a photoinitiator. The photoinitiator includes at least one of type I and type II photoinitiators. Type I photoinitiators generate free radicals by causing molecular decomposition due to differences in chemical structure or molecular binding energy. Type II photoinitiators are hydrogen-abstracting photoinitiators that introduce a tertiary amine as a co-initiator.

[0061] Type I photoinitiators include at least one of acetophenone initiators, acylphosphine oxides, and diacetic titanium compounds. Acetophenone initiators include, but are not limited to, 4-phenoxydichloroacetophenone, 4-tert-butyldichloroacetophenone, 4-tert-butyltrichloroacetophenone, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropanone, 1(4-isopropylphenyl)-2-hydroxy-2-methylpropanone, 1(4-dodecylphenyl)-2-hydroxy-2-methylpropanone, 4-(2-hydroxyethoxy)phenyl(2-hydroxy-2-propyl)one, and 1-hydroxycyclohexylphenyl ketone; benzoin initiators include at least one of benzoin, benzoin methyl ether, benzoin ethyl ether, and benzyl dimethyl ketal.

[0062] Type II photoinitiators include at least one of benzophenone initiators and thioxanone initiators. Benzophenone initiators include at least one of benzophenone, benzoylbenzoic acid, benzoylbenzoic acid methyl ether, 4-phenylbenzophenone, hydroxybenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, and 3,3'-dimethyl-4-methoxybenzophenone. Thioxanone initiators include at least one of thioxanone, 2-chlorothioxanone, 2-methylthioxanone, 2,4-dimethylthioxanone, and isopropylthioxanone.

[0063] The anti-glare composition further includes 1 to 10 parts of solvent. The solvent is selected from those with a boiling point of 50 to 150°C. If the boiling point is below 50°C, the solvent's volatility is high, affecting resin curing and coating thickness; if the boiling point is above 150°C, it affects drying efficiency, leading to increased costs. The solvent includes at least one of alcohol solvents, ester solvents, ketone solvents, and benzene solvents. The alcohol solvent includes, but is not limited to, at least one of methanol, ethanol, and isopropanol. The ester solvent includes, but is not limited to, at least one of ethyl acetate, propyl acetate, and butyl acetate. The ketone solvent includes, but is not limited to, at least one of acetone, butanone, and cyclohexanone. The benzene solvent includes, but is not limited to, at least one of toluene and xylene.

[0064] Based on the anti-glare composition in the above embodiments, such as Figure 1 As shown in the embodiments of this application, an anti-glare film 10 is also provided. The anti-glare film 10 includes a substrate 11 and an anti-glare coating 12 disposed on the substrate 11. The anti-glare coating 12 includes the anti-glare composition in the above embodiments and has an uneven surface. When the anti-glare composition is coated on the substrate 11, since the surface energy of the modified particles in the anti-glare composition is reduced, the modified particles will aggregate towards the surface of the film during coating. During curing, a continuous uneven structure is formed on the surface of the film, and a cross-linked network structure is formed with the resin and / or reactive monomers in the composition. This allows the prepared anti-glare coating to effectively achieve the anti-glare effect on the one hand, and also has excellent wear resistance on the other hand.

[0065] The anti-glare film 10 provided in this application embodiment has a transmittance of 85% or higher, a haze of 5% to 55%, a hardness of 3H or higher in a 500g weighted pencil test, and a friction test result of 50 cycles or higher in a 500g steel wool test.

[0066] The performance of the optical thin film provided in this application is verified through the following specific embodiments.

[0067] The preparation of surface-modified particulate-modified solutions includes:

[0068] (1) 11 g of 3 μm silica, 0.1 g of HCl, 9 g of ultrapure water, and 15 g of tetrahydrofuran were added to a 250 mL round-bottom flask and ultrasonically dispersed for 1 h. 9 g of 3-aminopropylmonodimethylethoxysilane was added to the round-bottom flask, and nitrogen gas was introduced. The mixture was stirred vigorously at 60 °C for 24 h. The mixture was then decomposed and separated into a colorless aqueous phase and a turbid organic phase containing the product. After evaporating the organic solvent from the organic phase, the remaining white viscous solution was dissolved in dichloromethane and extracted multiple times with ultrapure water. To remove trace amounts of water from the dichloromethane solution, MgSO4 was added as a drying agent, and the mixture was stirred overnight and then filtered. Subsequently, the dichloromethane was evaporated at 40 °C for 2 h to obtain the first oily product.

[0069] (2) 5 g of 50 nm silica, 0.1 g of HCl, 9 g of ultrapure water, and 15 g of tetrahydrofuran were added to a 250 mL round-bottom flask and ultrasonically dispersed for 1 h. 15 g of 3-aminopropylmonodimethylethoxysilane was added to the round-bottom flask, and nitrogen gas was introduced. The mixture was stirred vigorously at 60 °C for 48 h. The mixture was then decomposed into a colorless aqueous phase and a turbid organic phase containing the product. After evaporating the organic solvent from the organic phase, the remaining white viscous solution was dissolved in dichloromethane and extracted multiple times with ultrapure water. To remove trace amounts of water from the dichloromethane solution, MgSO4 was added as a drying agent, and the mixture was stirred overnight and then filtered. Subsequently, the dichloromethane was evaporated at 40 °C for 2 h to obtain a second oily product.

[0070] (3) Add 4g of the first oily product, 4g of the second oily product, 12g of trimethylbenzene triisocyanate, 40g of tetrahydrofuran, 140mg of dibutyltin dilaurate, and 110mg of p-hydroxyanisole to a 250mL round-bottom flask, purge with nitrogen, and stir at 40℃ for 5h to obtain the pre-modified microparticle-modified solution.

[0071] (4) Add 40g of the above pre-modified microparticle modification solution, 5g of pentaerythritol triacrylate, 40g of tetrahydrofuran, 160mg of dibutyltin dilaurate, and 118mg of p-hydroxyanisole to a 250mL round-bottom flask, purge with nitrogen, and stir at 40°C for 5h to obtain the modified microparticle modification solution.

[0072] Because the prepared surface-modified microparticle-modified liquid contains solvent, the inventors calculated that the content of surface-modified microparticles in the microparticle-modified liquid is 50% of the total mass of the microparticle-modified liquid. Based on 100 parts by weight of resin, when the surface-modified microparticle-modified liquid is 10 to 50 parts, the corresponding surface-modified microparticles are 5 to 25 parts.

[0073] Anti-glare coatings 12 were prepared on substrate 11 using anti-glare compositions containing surface-modified microparticle-modified liquids prepared in the above examples and compositions containing unmodified microparticles, respectively, to obtain anti-glare films prepared in Examples 1-3 and Comparative Examples 1-5. The anti-glare coatings 12 of all examples and comparative examples had the same film thickness of 3 μm and were prepared using the same methods (referring to the coating and curing processes in the prior art). The difference lay in the components and their contents in the anti-glare compositions. Please refer to Table 1 below for details.

[0074] Table 1

[0075]

[0076]

[0077] The transmittance, haze, pencil hardness, and steel wool friction of the anti-glare films prepared in Examples 1-6 and Comparative Examples 1-8 were tested respectively. The test conditions were the same for all examples and comparative examples. The test data are shown in Table 2 below.

[0078] Table 2

[0079]

[0080] The higher the hardness of a 500g weighted pencil and the higher the friction value of 500g steel wool, the higher the hardness and wear resistance of the anti-glare film. The test results show that the anti-glare films of Examples 1-6 have better hardness and wear resistance than those of Comparative Examples 1-6. This may be because the surface-modified microparticles of the anti-glare compositions provided in this application include small-diameter second microparticle structures. These small-diameter second microparticles have high particle hardness and are difficult to break down by external force. Furthermore, the surface-modified microparticles can form a cross-linked network structure with the resin and reactive monomers, further improving the film's hardness.

[0081] Higher haze results in better light scattering and thus better anti-glare performance. Considering the overall performance of the anti-glare film in terms of wear resistance and anti-glare effect, the anti-glare films of Examples 1-3 outperform those of Comparative Examples 7 and 8. This may be because the content of surface-modified microparticles in the resin of the anti-glare film affects the balance between hardness and anti-glare performance. When the surface-modified microparticle modification liquid is 10-50 parts (i.e., the surface-modified microparticles (excluding solvent) are 5-25 parts), the anti-glare film provided in this application exhibits both good wear resistance and anti-glare performance.

[0082] Please see Figure 2 This application also provides a polarizer 100, including a polarizing layer 20 and an anti-glare film 10 as described in the above embodiments. The anti-glare film 10 is disposed on the light-emitting surface side of the polarizing layer 20, and the uneven surface of the anti-glare layer 12 of the anti-glare film is located on the side of the anti-glare layer 12 away from the polarizing layer.

[0083] The polarizer 100 includes a hard coating layer located on the light-emitting side of the polarizing layer 20. Since the anti-glare film has good hardness, the anti-glare film 10 can be reused as the hard coating layer.

[0084] This application also provides a display device, including a display panel and the aforementioned polarizer 100 located on one side of the light-emitting surface of the display panel. The display device may be an OLED display device, a liquid crystal display device, a quantum dot display device, or a Mini / Micro LED display device.

[0085] In summary, this application provides an anti-glare composition, an anti-glare film, a polarizer, and a display device, comprising a resin and surface-modified microparticles. The surface-modified microparticles include first microparticles, second microparticles, and hydrophobic modifying groups. The hydrophobic modifying groups are chemically bonded to both the first and second microparticles. The particle size of the first microparticle is larger than that of the second microparticle. By modifying the microparticles of the anti-glare composition, the large-diameter first microparticle and the small-diameter second microparticle are linked together using hydrophobic modifying groups. Furthermore, the surface energy of the surface-modified microparticles is reduced. During the preparation of the anti-glare film, the modified microparticles aggregate towards the film surface, forming a continuous uneven surface from the large-diameter first microparticles, effectively achieving anti-glare. On the other hand, the small-diameter second microparticles aggregate around the large-diameter first microparticles through chemical bonds. Due to the high particle hardness of the small-diameter second microparticles, their structure is difficult to be damaged by external force, thus exhibiting excellent wear resistance.

[0086] The anti-glare composition, anti-glare film, polarizer, and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An anti-glare composition, characterized in that, The material includes a resin and surface-modified microparticles. The surface-modified microparticles include a first microparticle, a second microparticle, and a hydrophobic modifying group. The hydrophobic modifying group is connected to both the first microparticle and the second microparticle by chemical bonds. The particle size of the first microparticle is larger than that of the second microparticle. The first and second particles include silicon oxide particles, the first particle having a particle size of 1~10 μm and the second particle having a particle size of 10~100 nm; The structural formula of the surface-modified microparticles is: ； Based on 100 parts by weight of the resin, the anti-glare composition comprises the following components in the following amounts: 100 parts of the resin; The surface-modified microparticles are 5-25 parts; 5-30 parts of reactive monomers; and Initiator 1-10 parts.

2. The anti-glare composition according to claim 1, characterized in that, The hydrophobic modifying group contains carbon-carbon double bonds, and the surface-modified microparticles can form a cross-linked network structure with the resin and / or the reactive monomer.

3. The anti-glare composition according to claim 1, characterized in that, The resin includes at least one of polyester acrylic resin, polyurethane acrylic resin, epoxy acrylic resin, and polysilsesquioxane resin; And / or, the reactive monomers include at least one of the following: trimethylolpropane tri(meth)acrylate, trimethylolpropane tri(meth)acrylate, glycerol tri(meth)acrylate, pentaerythritol tri(meth)acrylate, di(trimethylolpropane)tri(meth)acrylate, dipentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, di(trimethylolpropane)tetra(meth)acrylate, dipentaerythritol tetra(meth)acrylate, dipentaerythritol penta(meth)acrylate, dipentaerythritol hexa(meth)acrylate, and di(trimethylolpropane) hexa(meth)acrylate; And / or, the initiator comprises 4 phenoxydichloroacetophenone, 4 tert-butyldichloroacetophenone, 4 tert-butyltrichloroacetophenone, diethoxyacetophenone, 2 hydroxyl 2 methyl 1 Phenylacetylene 1 Ketone, 1 (4 (isopropylphenyl) 2 hydroxyl 2 Methylpropionate 1 Ketone, 1 (4 Dodecylphenyl) 2 hydroxyl 2 Methylpropionate 1 Ketones, 4 (2 Hydroxyethoxy Phenyl(2) hydroxyl 2 propyl ketone, 1 Hydroxycyclohexylphenyl ketone, benzoin, benzoin methyl ether, benzoin diethyl ether, benzyl dimethyl ketal, acylphosphine oxide, titanium ceramsite, benzophenone, benzoylbenzoic acid, benzoylbenzoic acid methyl ether, 4 phenylbenzophenone, hydroxybenzophenone, 4 benzoyl 4' Methyl diphenyl sulfide, 3,3' dimethyl 4 Methoxybenzophenone, thioxanone, 2 Chlorthoxanone, 2 Methylthioxanone, 2,4 At least one of dimethylthioxanone and isopropylthioxanone.

4. An anti-glare film, characterized in that, The invention includes a substrate and an anti-glare layer disposed on the substrate, the anti-glare layer comprising the anti-glare composition as described in any one of claims 1 to 3, the anti-glare layer comprising an uneven surface.

5. A polarizer, characterized in that, It includes a polarizing layer and an anti-glare film disposed on one side of the light-emitting surface of the polarizing layer, wherein the anti-glare film is the anti-glare film as described in claim 4.

6. The polarizer according to claim 5, characterized in that, The polarizer includes a hard coating layer located on the light-emitting side of the polarizing layer, and the anti-glare film is reused as the hard coating layer.

7. A display device, characterized in that, It includes a display panel and a polarizer located on one side of the light-emitting surface of the display panel, wherein the polarizer is the polarizer as described in claim 5 or 6.

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