Anti-glare antibacterial coating liquid and preparation method, anti-glare antibacterial coating, anti-glare antibacterial optical film, polarizing plate and preparation method

Abstract

The application provides an anti-glare antibacterial coating liquid and a preparation method thereof, an anti-glare antibacterial coating, an anti-glare antibacterial optical film, and a polarizer and a preparation method thereof, and belongs to the technical field of optical films. The preparation method of the anti-glare antibacterial coating liquid comprises the following steps: stirring a mixed system containing an antibacterial system, an acrylic resin, an anti-glare component, and a dispersion solvent. The preparation method of the antibacterial system comprises the following steps: first mixing a first sol and an antibacterial agent to obtain a first system; and then second mixing the first system, a second sol, an alcohol solvent, and a polyether siloxane; and the antibacterial agent is a photocatalytic antibacterial agent. The preparation method of the anti-glare antibacterial coating liquid provided by the application can make the antibacterial agent in the anti-glare antibacterial coating liquid be effectively encapsulated and isolated by the second sol, so that the antibacterial agent in the anti-glare antibacterial coating layer formed by solidification and molding of the anti-glare antibacterial coating liquid is not easily affected in an alkali washing process, and the anti-glare antibacterial coating layer can effectively exert the antibacterial performance after alkali treatment.

Description

Technical Field

[0001] This application relates to the field of optical film technology, and more specifically, to an anti-glare and antibacterial coating liquid and its preparation method, an anti-glare and antibacterial coating layer, an anti-glare and antibacterial optical film, a polarizer and its preparation method. Background Technology

[0002] A polarizing film includes a polyvinyl alcohol (PVA) film layer and an anti-glare optical film covering the surface of the PVA film layer to protect it. The anti-glare optical film includes a transparent substrate and an anti-glare coating covering the surface of the transparent substrate. The side of the transparent substrate away from the anti-glare coating is the non-anti-glare side, which is bonded to the surface of the PVA film layer. During the preparation of the polarizing film, in order to ensure effective bonding between the anti-glare optical film and the PVA film layer, and to prevent delamination between the non-anti-glare side of the anti-glare optical film and the PVA film layer, the anti-glare optical film is typically first immersed in an alkaline solution for alkaline treatment. Then, the anti-glare optical film is washed with water and dried before being bonded to the PVA film layer.

[0003] As a key functional layer of polarizers, the anti-glare coating is prone to contamination and bacterial growth over long-term use. To improve its antibacterial properties, an anti-glare and antibacterial coating solution with antibacterial properties is typically used for curing. Currently, the preparation method for this solution generally involves directly mixing the anti-glare solution with an antibacterial agent. However, this method can lead to the antibacterial agent in the cured anti-glare and antibacterial coating being affected during the alkaline washing process. This results in a decrease in the antibacterial properties of the coating after alkaline treatment, hindering the full realization of its antibacterial performance in polarizers. Summary of the Invention

[0004] The purpose of this application is to provide an anti-glare and antibacterial coating liquid and its preparation method, an anti-glare and antibacterial coating layer, an anti-glare and antibacterial optical film, a polarizer and its preparation method, which aim to improve the antibacterial performance of the anti-glare and antibacterial coating after alkali treatment.

[0005] In a first aspect, this application provides a method for preparing an anti-glare and antibacterial coating liquid. The method includes stirring a mixture containing an antibacterial system, acrylic resin, an anti-glare component, and a dispersing solvent. The preparation method of the antibacterial system includes: first mixing a first sol with an antibacterial agent to obtain a first system; then second mixing the first system, a second sol, an alcohol solvent, and a polyether siloxane; the antibacterial agent is a photocatalytic antibacterial agent.

[0006] In the preparation method of the anti-glare and antibacterial coating liquid provided in this application, the first sol has a large specific surface area, which can adsorb the antibacterial agent on the surface of the first sol; the alcohol solvent and polyether siloxane can cause the second sol to aggregate and coat the surface of the first sol on which the antibacterial agent is adsorbed, so that the antibacterial agent is effectively encapsulated by the second sol, thereby keeping the antibacterial agent in the anti-glare and antibacterial coating liquid in a state of effective encapsulation and isolation by the second sol. The antibacterial agent in the anti-glare and antibacterial coating obtained by curing and molding the anti-glare and antibacterial coating liquid is effectively encapsulated and isolated, which can make the antibacterial agent in the anti-glare and antibacterial coating less affected during the alkaline washing process; and the antibacterial agent is a photocatalytic antibacterial agent, which can exert its antibacterial properties under light conditions, so that the anti-glare and antibacterial coating can effectively exert its antibacterial properties after alkaline treatment.

[0007] In conjunction with the first aspect, in optional embodiments of this application, the first sol and the second sol are each independently selected from at least one of silica sol, alumina sol, and zirconium sol; or / and, the alcohol solvent includes at least one of isopropanol, propylene glycol, and cyclopentanol; or / and, the antibacterial agent includes at least one of nano zinc oxide, nano zirconium oxide, and nano titanium oxide; or / and, the acrylic resin includes at least one of polyurethane acrylic resin, silicone acrylic resin, and polyester acrylic resin; or / and, the dispersion solvent includes at least one of ethyl acetate, butyl acetate, toluene, xylene, acetone, butanone, cyclohexanone, methyl isobutyl ketone, propylene glycol methyl ether, propylene glycol ethyl ether, ethylene glycol butyl ether, propylene glycol butyl ether, butanediol butyl ether, and dipropylene glycol methyl ether; or / and, the anti-glare component includes at least one of silica, polystyrene, polymethyl methacrylate, and polybutyl methacrylate; or / and, the particle size of the anti-glare component is 2.2 μm to 4.2 μm.

[0008] In the above technical solution, the anti-glare and antibacterial coating can effectively exert its antibacterial properties after alkali treatment.

[0009] In conjunction with the first aspect, in optional embodiments of this application, the mass ratio of the first sol to the antibacterial agent is (5-10):1; or / and, the mass ratio of the second sol to the antibacterial agent is (5-40):1; or / and, the mass ratio of the alcohol solvent to the antibacterial agent is (3-100):1; or / and, the mass ratio of the polyether siloxane to the antibacterial agent is (0.01-0.1):1.

[0010] In the above technical solution, the mass ratio of the first sol to the antibacterial agent is (5-10):1, which allows the antibacterial agent to be fully adsorbed by the first sol; the mass ratio of the second sol to the antibacterial agent is (5-40):1, which allows the second sol to be fully coated on the surface of the first sol on which the antibacterial agent is adsorbed; the mass ratio of the alcohol solvent to the antibacterial agent is (3-100):1, which can further promote the aggregation of the second sol, thereby facilitating the second sol to be fully coated on the surface of the first sol on which the antibacterial agent is adsorbed; the mass ratio of the polyether siloxane to the antibacterial agent is (0.01-0.1):1, which can further promote the aggregation of the second sol, thereby facilitating the second sol to be fully coated on the surface of the first sol on which the antibacterial agent is adsorbed.

[0011] In conjunction with the first aspect, in optional embodiments of this application, the first mixing is carried out by first stirring, the stirring speed of the first stirring is 500 rpm to 2000 rpm, and the stirring time is 10 min to 60 min; or / and, the second mixing is carried out by second stirring, the stirring speed of the second stirring is 500 rpm to 1000 rpm, and the stirring time is 30 min to 60 min.

[0012] In the above technical solution, the first mixing adopts a first stirring mixing, the first stirring mixing speed is 500rpm~2000rpm, and the first stirring mixing time is 10min~60min, which can make the antibacterial agent be fully adsorbed by the first sol; the second mixing adopts a second stirring mixing, the second stirring mixing speed is 500rpm~1000rpm, and the second stirring mixing time is 30min~60min, which is beneficial to the second sol being able to fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0013] In conjunction with the first aspect, in an optional embodiment of this application, the mixed system includes the following components in parts by weight: 1 to 10 parts of an antibacterial system, 15 to 40 parts of acrylic resin, 0.8 to 5 parts of an anti-glare component, and 20 to 200 parts of a dispersing solvent.

[0014] Optionally, the mixture may also include 1 to 4 parts of photoinitiator.

[0015] Optionally, the mixture may also include 0.01 to 0.15 parts of leveling agent.

[0016] Optionally, the mixture may also include 4 to 15 parts of acrylate monomers.

[0017] Secondly, this application provides an anti-glare and antibacterial coating liquid, which is prepared by the preparation method of the anti-glare and antibacterial coating liquid provided in any of the first aspects above.

[0018] In the anti-glare and antibacterial coating provided in this application, the antibacterial agent is effectively encapsulated and isolated by the second sol. The antibacterial agent in the anti-glare and antibacterial coating obtained by curing the anti-glare and antibacterial coating is effectively encapsulated and isolated, which makes the antibacterial agent in the anti-glare and antibacterial coating less susceptible to damage during the alkaline washing process. Furthermore, the antibacterial agent is a photocatalytic antibacterial agent, which can exert its antibacterial properties under light conditions, allowing the anti-glare and antibacterial coating to effectively exert its antibacterial properties after alkaline treatment.

[0019] Thirdly, this application provides an anti-glare and antibacterial coating, which is a cured product of the anti-glare and antibacterial coating liquid provided in the second aspect above.

[0020] The antibacterial agent in the anti-glare and antibacterial coating provided in this application is not easily affected during the alkaline washing process, which allows the anti-glare and antibacterial coating to effectively exert its antibacterial properties after alkaline treatment.

[0021] Fourthly, this application provides an anti-glare and antibacterial optical film, which includes: a transparent substrate and the anti-glare and antibacterial coating provided in the third aspect above; the anti-glare and antibacterial coating covers the surface of the transparent substrate.

[0022] The anti-glare and antibacterial optical film provided in this application is not easily affected by the alkaline washing process, which allows the anti-glare and antibacterial optical film to effectively exert its antibacterial properties after alkaline treatment.

[0023] Fifthly, this application provides a method for preparing a polarizer, the method comprising: sequentially subjecting the anti-glare and antibacterial optical film provided in the fourth aspect to alkali treatment, cleaning, and drying; then laminating the optical film layer and the dried anti-glare and antibacterial optical film with a polyvinyl alcohol film layer, such that the anti-glare and antibacterial optical film and the optical film layer respectively cover two opposite surfaces of the polyvinyl alcohol film layer. The anti-glare and antibacterial coating is located on the side of the transparent substrate away from the polyvinyl alcohol film layer; the alkali treatment step includes immersing the anti-glare and antibacterial optical film in an alkaline solution.

[0024] In the method for preparing the polarizer provided in this application, the anti-glare and antibacterial optical film is in a state of effective encapsulation and isolation. The antibacterial agent in the anti-glare and antibacterial optical film is not easily affected during the alkaline washing process. Therefore, the anti-glare and antibacterial optical film after alkaline treatment can not only effectively coat with the polyvinyl alcohol film layer, but also prevent the anti-glare optical film from peeling off from the polyvinyl alcohol film layer. Moreover, the anti-glare and antibacterial optical film after alkaline treatment can effectively exert its antibacterial properties.

[0025] Sixthly, this application provides a polarizer, which is prepared by the method for preparing a polarizer provided in the fifth aspect above.

[0026] The anti-glare and antibacterial optical film in the polarizer provided in this application has high antibacterial properties, and the anti-glare and antibacterial optical film in the polarizer is not prone to delamination between itself and the polyvinyl alcohol film layer. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 The process flow diagram for preparing the anti-glare and antibacterial coating provided in this application is shown. Detailed Implementation

[0029] This application provides a method for preparing an anti-glare and antibacterial coating liquid. The method includes stirring a mixture containing an antibacterial system, acrylic resin, anti-glare components, and a dispersing solvent. The preparation method of the antibacterial system includes: first mixing a first sol with an antibacterial agent to obtain a first system; then second mixing the first system, a second sol, an alcohol solvent, and a polyether siloxane; the antibacterial agent is a photocatalytic antibacterial agent.

[0030] In the preparation method of the anti-glare and antibacterial coating liquid provided in this application, the first sol has a large specific surface area, which can adsorb the antibacterial agent on the surface of the first sol; the alcohol solvent and polyether siloxane can cause the second sol to aggregate and coat the surface of the first sol on which the antibacterial agent is adsorbed, so that the antibacterial agent is effectively encapsulated by the second sol, thereby keeping the antibacterial agent in the anti-glare and antibacterial coating liquid in a state of effective encapsulation and isolation by the second sol. The antibacterial agent in the anti-glare and antibacterial coating obtained by curing and molding the anti-glare and antibacterial coating liquid is effectively encapsulated and isolated, which can make the antibacterial agent in the anti-glare and antibacterial coating less affected during the alkaline washing process; and the antibacterial agent is a photocatalytic antibacterial agent, which can exert its antibacterial properties under light conditions, so that the anti-glare and antibacterial coating can effectively exert its antibacterial properties after alkaline treatment.

[0031] Figure 1 For a flow chart of the preparation process of the anti-glare and antibacterial coating provided in this application, please refer to [link / reference needed]. Figure 1 The preparation method of the anti-glare and antibacterial coating includes the following steps:

[0032] S110, the first sol and the antibacterial agent are mixed in the first mixture to obtain the first system; then the first system, the second sol, the alcohol solvent and the polyether siloxane are mixed in the second mixture to obtain the antibacterial system.

[0033] In this application, the antibacterial agent is a photocatalytic antibacterial agent; the photocatalytic antibacterial agent absorbs photon electron energy from the outside, and electrons in the valence band jump to the conduction band, exciting oxygen in the surrounding environment of the photocatalytic antibacterial agent to form superoxide anions, which exert antibacterial properties through superoxide anions.

[0034] In some optional embodiments of this application, the antibacterial agent includes at least one of nano zinc oxide, nano zirconium oxide, and nano titanium oxide.

[0035] It should be noted that in other feasible embodiments of this application, the antibacterial agent is not limited to the substances mentioned above, as long as it is a photocatalyst-type antibacterial agent. Photocatalyst-type antibacterial agents can be obtained through conventional commercial purchases.

[0036] In some optional embodiments of this application, the first sol and the second sol are each independently selected from at least one of silica sol, aluminum sol, and zirconium sol. These sols have high specific surface area and adsorption capacity, enabling the first sol to effectively and sufficiently adsorb the antibacterial agent onto its surface, and enabling the second sol to effectively and sufficiently coat the surface of the first sol on which the antibacterial agent is adsorbed, thereby ensuring that the antibacterial agent is effectively and sufficiently encapsulated and isolated.

[0037] It should be noted that in other feasible embodiments of this application, the first sol and the second sol are not limited to the above-mentioned substances, as long as they are sols.

[0038] In this application, an alcohol solvent (non-ether solvent or ester solvent) must be used to mix with the first system, the second sol, and the polyether siloxane in order to promote the aggregation of the second sol, which in turn helps the second sol to more fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0039] In some optional embodiments of this application, the alcohol solvent includes at least one of isopropanol, propylene glycol, and cyclopentanol. The aforementioned alcohol solvent can promote the aggregation of the second sol, thereby facilitating the second sol to more fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0040] It should be noted that in other feasible embodiments of this application, the alcohol solvent is not limited to the above-mentioned substances, as long as it is an alcohol solvent.

[0041] In some optional embodiments of this application, the polyether siloxane is selected from at least one of polyether-modified polydimethylsiloxane and polyether-modified heptamethyltrisiloxane.

[0042] In some optional embodiments of this application, the mass ratio of the first sol to the antibacterial agent is (5-10):1, which allows the antibacterial agent to be more fully adsorbed by the first sol.

[0043] As an example, the mass ratio of the first sol to the antibacterial agent can be any one of 5:1, 6:1, 7:1, 8:1, 9:1, and 10:1, or any range between the two.

[0044] In some optional embodiments of this application, the mass ratio of the second sol to the antibacterial agent is (5-40):1, which allows the second sol to more fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0045] As an example, the mass ratio of the second sol to the antibacterial agent can be any one of 5:1, 10:1, 15:1, 20:1, 25:1, 30:1, 35:1 and 40:1 or any range between the two.

[0046] Furthermore, the mass ratio of the second sol to the antibacterial agent is (20-30):1.

[0047] In some optional embodiments of this application, the mass ratio of alcohol solvent to antibacterial agent is (3-100):1, which can further promote the aggregation of the second sol, thereby facilitating the second sol to more fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0048] As an example, the mass ratio of alcohol solvent to antibacterial agent can be any one of 3:1, 10:1, 20:1, 30:1, 50:1, 75:1, 90:1 and 100:1 or any range between the two.

[0049] Furthermore, the mass ratio of alcohol solvent to antibacterial agent is (10-40):1.

[0050] In some optional embodiments of this application, the mass ratio of polyether siloxane to antibacterial agent is (0.01 to 0.1):1, which can further promote the aggregation of the second sol, thereby facilitating the second sol to more fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0051] As an example, the mass ratio of polyether siloxane to antibacterial agent can be any one of 0.01:1, 0.02:1, 0.03:1, 0.05:1, 0.06:1, 0.07:1, 0.08:1, 0.09:1, and 0.1:1, or any range between the two.

[0052] Furthermore, the mass ratio of polyether siloxane to antibacterial agent is (0.02–0.1):1.

[0053] In some optional embodiments of this application, the first mixing is carried out by first stirring, the stirring speed is 500 rpm to 2000 rpm, and the stirring time is 10 min to 60 min. This method allows the antibacterial agent to be more fully adsorbed by the first sol.

[0054] As an example, the first stirring speed can be any value among 500 rpm, 600 rpm, 700 rpm, 800 rpm, 1000 rpm, 1200 rpm, 1500 rpm, 1700 rpm and 2000 rpm or any value between the two, and the first stirring time can be any value among 10 min, 15 min, 20 min, 30 min, 40 min, 50 min and 60 min or any value between the two.

[0055] In some optional embodiments of this application, the second mixing is carried out by a second stirring, with a stirring speed of 500 rpm to 1000 rpm and a stirring time of 30 min to 60 min. This method facilitates the second sol to more fully coat the surface of the first sol on which the antibacterial agent is adsorbed.

[0056] As an example, the second stirring speed can be any value among 500 rpm, 600 rpm, 700 rpm, 800 rpm, 900 rpm and 1000 rpm or any value between the two, and the second stirring time can be any value among 30 min, 35 min, 40 min, 45 min, 50 min, 55 min and 60 min or any value between the two.

[0057] S120 involves stirring a mixture containing an antibacterial system, acrylic resin, anti-glare components, and a dispersing solvent.

[0058] In some optional embodiments of this application, the acrylic resin includes at least one of polyurethane acrylic resin, silicone acrylic resin, and polyester acrylic resin. The aforementioned acrylic resin can undergo a cross-linking and curing reaction in the presence of ultraviolet light and a photoinitiator to form an anti-glare and antibacterial coating, thereby giving the anti-glare and antibacterial coating a certain degree of hardness and wear resistance.

[0059] In some optional embodiments of this application, the functionality of the acrylic resin is 6 to 9, which enables the anti-glare and antibacterial coating to have high hardness and wear resistance.

[0060] As an example, the acrylic resin is selected from either a nine-functional polyurethane acrylic resin or a six-functional polyurethane acrylic resin.

[0061] It should be noted that in other optional embodiments of this application, the acrylic resin is not limited to the above-mentioned substances. For example, the acrylic resin may also be selected from epoxy acrylic resin or aromatic acrylic resin, etc.

[0062] In some optional embodiments of this application, the anti-glare component includes at least one of silica, polystyrene, polymethyl methacrylate, and polybutyl methacrylate.

[0063] It should be noted that in other feasible embodiments of this application, the anti-glare component is not limited to the above-mentioned substances, as long as it is a component that ultimately gives the anti-glare and antibacterial coating anti-glare performance.

[0064] In some optional embodiments of this application, the particle size of the anti-glare component is 2.2 μm to 4.2 μm, which makes it easier for the anti-glare component to be evenly and fully dispersed in the anti-glare and antibacterial coating liquid, thereby improving the anti-glare performance of the entire anti-glare and antibacterial coating.

[0065] As an example, the particle size of the anti-glare component can be any value among 2.2μm, 2.5μm, 2.7μm, 3μm, 3.2μm, 3.5μm, 3.7μm, 4μm and 4.2μm or any range between the two.

[0066] In some optional embodiments of this application, the dispersing solvent includes at least one selected from ethyl acetate, butyl acetate, toluene, xylene, acetone, butanone, cyclohexanone, methyl isobutyl ketone, propylene glycol methyl ether, propylene glycol ethyl ether, ethylene glycol butyl ether, propylene glycol butyl ether, butanediol butyl ether, and dipropylene glycol methyl ether. Using the above-mentioned solvents as the dispersing solvent allows for the effective dispersion of the antibacterial system, acrylic resin, and anti-glare components.

[0067] In some optional embodiments of this application, the mixed system comprises the following components by weight: 1 to 10 parts of an antibacterial system, 15 to 40 parts of acrylic resin, 0.8 to 5 parts of an anti-glare component, and 20 to 200 parts of a dispersing solvent. By adjusting the proportions of each component in the mixed system, this application enables the anti-glare and antibacterial coating prepared using this anti-glare and antibacterial coating liquid to possess good antibacterial and anti-glare properties.

[0068] As an example, in the mixed system, the weight parts of the antibacterial system can be any one of 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, and 10 parts, or any range between any two; the weight parts of the acrylic resin can be any one of 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, and 40 parts, or any range between any two; the weight parts of the anti-glare component can be any one of 0.8 parts, 1 part, 1.1 parts, 2 parts, 3 parts, 4 parts, and 5 parts, or any range between any two; and the dispersing solvent can be any one of 20 parts, 50 parts, 70 parts, 100 parts, 120 parts, 150 parts, 170 parts, and 200 parts, or any range between any two.

[0069] In some optional embodiments of this application, the mixture further includes 1 to 4 parts of a photoinitiator. The photoinitiator is used to initiate the crosslinking of the acrylic resin, thereby causing the anti-glare and antibacterial coating to undergo a curing reaction and form an anti-glare and antibacterial coating layer.

[0070] As an example, in the mixed system, the weight parts of the photoinitiator can be any one of 1 part, 1.5 parts, 1.6 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts and 4 parts or any range between two.

[0071] In some optional embodiments of this application, the photoinitiator includes at least one of 2-hydroxy-2-methylphenylacetone, 1-hydroxycyclohexylphenylacetone, and 2,4,6-trimethylbenzoyl-diphenylphosphine oxide.

[0072] It should be noted that in other optional embodiments of this application, the photoinitiator is not limited to the above-mentioned substances. For example, the photoinitiator may also be selected from 1,1'(methylenedi-4,1-phenylene)bis[2-hydroxy-2-methyl-1-acetone], benzoin dimethyl ether, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butanone, or phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide, etc.

[0073] It should be noted that when preparing the anti-glare and antibacterial coating liquid in this application, a photoinitiator may not be used. Before using the anti-glare and antibacterial coating liquid to form the anti-glare and antibacterial coating, the anti-glare and antibacterial coating liquid is mixed with a photoinitiator and then cured to form the anti-glare and antibacterial coating.

[0074] In some optional embodiments of this application, the mixture further includes 4 to 15 parts of acrylate monomers. The acrylate monomers are used to improve the adhesion of the anti-glare and antibacterial coating and to adjust its flexibility.

[0075] As an example, in the mixed system, the weight parts of the acrylate monomer can be any one of 4 parts, 6 parts, 8 parts, 10 parts, 12 parts, 14 parts, and 15 parts, or any range between both.

[0076] In some optional embodiments of this application, the functionality of the acrylate monomer is 3 to 6, which can improve the adhesion and flexibility of the anti-glare and antibacterial coating.

[0077] Furthermore, in some optional embodiments of this application, the acrylate monomer includes at least one of pentaerythritol hexaacrylate, pentaerythritol triacrylate, ethoxyethyl acrylate, trimethylolpropane triacrylate, hexanediol diacrylate, and propoxypentanediol diacrylate.

[0078] In some optional embodiments of this application, the mixing system further includes 0.01 to 0.15 parts of a leveling agent. The leveling agent is used to make the anti-glare and antibacterial coating smoother during application.

[0079] As an example, in the mixed system, the weight parts of the leveling agent can be any one of 0.01 parts, 0.02 parts, 0.05 parts, 0.07 parts, 0.1 parts, 0.12 parts, and 0.15 parts, or any range between both.

[0080] As an example, the leveling agent may be a fluorinated acrylic polymer leveling agent, but this application is not limited to that.

[0081] This application provides an anti-glare and antibacterial coating liquid, which is prepared by the above-mentioned method for preparing the anti-glare and antibacterial coating liquid.

[0082] In the anti-glare and antibacterial coating provided in this application, the antibacterial agent is effectively encapsulated and isolated by the second sol. The antibacterial agent in the anti-glare and antibacterial coating obtained by curing the anti-glare and antibacterial coating is effectively encapsulated and isolated, which makes the antibacterial agent in the anti-glare and antibacterial coating less susceptible to damage during the alkaline washing process. Furthermore, the antibacterial agent is a photocatalytic antibacterial agent, which can exert its antibacterial properties under light conditions, allowing the anti-glare and antibacterial coating to effectively exert its antibacterial properties after alkaline treatment.

[0083] This application provides an anti-glare and antibacterial coating, which is the cured product of the anti-glare and antibacterial coating liquid provided above.

[0084] The antibacterial agent in the anti-glare and antibacterial coating provided in this application is not easily affected during the alkaline washing process, which allows the anti-glare and antibacterial coating to effectively exert its antibacterial properties after alkaline treatment.

[0085] This application provides a method for preparing the above-mentioned anti-glare and antibacterial coating, the method comprising: sequentially heating and curing the aforementioned anti-glare and antibacterial coating liquid with heat and UV curing.

[0086] In some optional embodiments of this application, the heat curing temperature is 60°C to 80°C, and the heat curing time is 2 min to 4 min.

[0087] In some optional embodiments of this application, the UV curing energy is 200 mJ / cm². 2 ~600mJ / cm 2 .

[0088] This application provides an anti-glare and antibacterial optical film, which includes: a transparent substrate and the anti-glare and antibacterial coating provided above; the anti-glare and antibacterial coating covers the surface of the transparent substrate.

[0089] The anti-glare and antibacterial optical film provided in this application is not easily affected by the alkaline washing process, which allows the anti-glare and antibacterial optical film to effectively exert its antibacterial properties after alkaline treatment.

[0090] It should be noted that this application does not limit the material and thickness of the transparent substrate; for example, the material of the transparent substrate includes cellulose triacetate (TAC), polymethyl methacrylate (PMMA) or polyethylene terephthalate (PET), etc.

[0091] This application provides a method for preparing the above-mentioned anti-glare and antibacterial optical film. The method includes: coating the above-mentioned anti-glare and antibacterial coating liquid onto the surface of a transparent substrate, and then performing heat curing and UV curing in sequence.

[0092] In some optional embodiments of this application, the heat curing temperature is 60°C to 80°C, and the heat curing time is 2 min to 4 min.

[0093] In some optional embodiments of this application, the UV curing energy is 200 mJ / cm². 2 ~600mJ / cm 2 .

[0094] This application also provides a method for preparing a polarizer, which includes: sequentially subjecting the provided anti-glare and antibacterial optical film to alkali treatment, cleaning, and drying; then laminating the optical film layer and the dried anti-glare and antibacterial optical film with a polyvinyl alcohol film layer, such that the anti-glare and antibacterial optical film and the optical film layer respectively cover two opposite surfaces of the polyvinyl alcohol film layer. The anti-glare and antibacterial coating is located on the side of the transparent substrate away from the polyvinyl alcohol film layer; the alkali treatment step includes immersing the anti-glare and antibacterial optical film in an alkaline solution.

[0095] In the method for preparing the polarizer provided in this application, the anti-glare and antibacterial optical film is in a state of effective encapsulation and isolation. The antibacterial agent in the anti-glare and antibacterial optical film is not easily affected during the alkaline washing process. Therefore, the anti-glare and antibacterial optical film after alkaline treatment can not only effectively coat with the polyvinyl alcohol film layer, but also prevent the anti-glare optical film from peeling off from the polyvinyl alcohol film layer. Moreover, the anti-glare and antibacterial optical film after alkaline treatment can effectively exert its antibacterial properties.

[0096] It should be noted that this application does not limit the thickness of the polyvinyl alcohol film layer or the thickness of the anti-glare and antibacterial optical film; the choice can be made according to the actual situation.

[0097] In some optional embodiments of this application, the alkali treatment time is 1 min to 3 min, and the alkali treatment temperature is 40°C to 60°C.

[0098] In some optional embodiments of this application, the alkaline solution is selected as a sodium hydroxide aqueous solution with a mass fraction of 5% to 15% or a potassium hydroxide aqueous solution with a mass fraction of 5% to 15%.

[0099] In some optional embodiments of this application, the cleaning method is water washing.

[0100] In some optional embodiments of this application, the drying temperature is 60°C to 70°C.

[0101] In some optional embodiments of this application, the step of laminating the dried anti-glare and antibacterial optical film, the optical film layer and the polyvinyl alcohol film layer includes: laminating the anti-glare and antibacterial optical film, the optical film layer and the polyvinyl alcohol film layer using guide rollers, wherein the anti-glare and antibacterial optical film and the optical film layer are arranged on both sides of the polyvinyl alcohol film layer.

[0102] As an example, the material of the optical film layer can be triacetate cellulose (TAC), polymethyl methacrylate (PMMA), or polyethylene terephthalate (PET), etc.

[0103] This application provides a polarizer, which is prepared by the polarizer preparation method described above.

[0104] The anti-glare and antibacterial optical film in the polarizer provided in this application has high antibacterial properties, and the anti-glare and antibacterial optical film in the polarizer is not prone to delamination between itself and the polyvinyl alcohol film layer.

[0105] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or instruments whose manufacturers are not specified are all conventional products that can be purchased commercially.

[0106] Example 1

[0107] This embodiment provides an anti-glare and antibacterial optical film, which includes a transparent TAC film and an anti-glare and antibacterial coating covering the surface of the TAC film; the thickness of the TAC film is 40 μm, and the thickness of the anti-glare and antibacterial coating is 4 μm; wherein, the method for preparing the anti-glare and antibacterial optical film includes the following steps:

[0108] (1) A silica sol (denoted as the first sol) with a mass ratio of 5:1 was mixed with nano zinc oxide antibacterial agent at 1500 rpm for 15 min to obtain the first system. Silica sol (denoted as the second sol), isopropanol, and polyether-modified polydimethylsiloxane (i.e., polyether siloxane) were added to the first system and stirred at 1000 rpm for 45 min to obtain the antibacterial system.

[0109] The mass ratio of the second sol, isopropanol, polyether-modified polydimethylsiloxane, and nano zinc oxide antibacterial agent is 20:10:0.02:1.

[0110] (2) The antibacterial system obtained in step (1) with a mass ratio of 5:20:6:1.6:1.1:50, nonfunctional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e. anti-glare component) and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene and 10 parts by weight of propylene glycol methyl ether) are mixed and stirred at 1200 rpm for 120 min to obtain anti-glare antibacterial coating liquid.

[0111] (3) Apply the anti-glare and antibacterial coating obtained in step (2) to the surface of the TAC film. After coating, heat and cure at 80°C for 2 minutes, then apply UV energy of 300 mJ / cm. 2 UV curing is performed.

[0112] Example 2

[0113] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and Embodiment 1 is that the first sol in Embodiment 1 is replaced with aluminum sol.

[0114] Example 3

[0115] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and Embodiment 1 is that the second sol in Embodiment 1 is replaced with aluminum sol.

[0116] Example 4

[0117] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and Embodiment 1 is that isopropanol in Embodiment 1 is replaced with propylene glycol.

[0118] Example 5

[0119] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and Embodiment 1 is that the polyether-modified polydimethylsiloxane in Embodiment 1 is replaced with polyether-modified heptamethyltrisiloxane.

[0120] Example 6

[0121] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and Embodiment 1 is that the nano zinc oxide antibacterial agent in Embodiment 1 is replaced with a nano zirconium oxide antibacterial agent.

[0122] Example 7

[0123] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and Embodiment 1 is that the nine-functional polyurethane acrylic resin in Embodiment 1 is replaced with a six-functional polyurethane acrylic resin.

[0124] Example 8

[0125] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and embodiment 1 is that in step (1) of this embodiment, the mass ratio of the first sol to the nano zinc oxide antibacterial agent is 10:1.

[0126] In step (2) of this embodiment, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0127] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0128] Example 9

[0129] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and embodiment 1 is that in step (1) of this embodiment, the mass ratio of the second sol to the nano zinc oxide antibacterial agent is 30:1.

[0130] In step (2) of this embodiment, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0131] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0132] Example 10

[0133] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and embodiment 1 is that in step (1) of this embodiment, the mass ratio of isopropanol to nano zinc oxide antibacterial agent is 40:1.

[0134] In step (2) of this embodiment, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0135] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0136] Example 11

[0137] This embodiment provides an anti-glare and antibacterial optical film. The difference between this embodiment and embodiment 1 is that in step (1) of this embodiment, the mass ratio of polyether-modified polydimethylsiloxane to nano zinc oxide antibacterial agent is 0.1:1.

[0138] In step (2) of this embodiment, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0139] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0140] Comparative Example 1

[0141] This comparative example provides an anti-glare and antibacterial optical film. The difference between this comparative example and Example 1 is that step (1) is different. This comparative example does not use a second sol. Step (1) of this comparative example is as follows:

[0142] A silica sol (referred to as the first sol) with a mass ratio of 25:1 was mixed with nano-zinc oxide antibacterial agent at 1500 rpm for 15 min to obtain the first system. Isopropanol and polyether-modified polydimethylsiloxane (i.e., polyether siloxane) were added to the first system and stirred at 1000 rpm for 45 min to obtain the antibacterial system.

[0143] The mass ratio of isopropanol, polyether siloxane, and nano zinc oxide antibacterial agent is 10:0.02:1.

[0144] In step (2) of this comparative example, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0145] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0146] Comparative Example 2

[0147] This comparative example provides an anti-glare and antibacterial optical film. The difference between this comparative example and Example 1 is that step (1) is different. The first sol is not used in this comparative example. Step (1) of this comparative example is as follows:

[0148] The antibacterial system was obtained by stirring nano zinc oxide antibacterial agent, silica sol (referred to as the second sol), isopropanol and polyether modified polydimethylsiloxane (i.e. polyether siloxane) at 1500 rpm for 60 min.

[0149] The mass ratio of the second sol, isopropanol, polyether siloxane, and nano zinc oxide antibacterial agent is 25:10:0.02:1.

[0150] In step (2) of this comparative example, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0151] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0152] Comparative Example 3

[0153] This comparative example provides an anti-glare and antibacterial optical film. The difference between this comparative example and Example 1 is that step (1) is different. Polyether siloxane is not used in this comparative example. Step (1) of this comparative example is as follows:

[0154] A silica sol (denoted as the first sol) and nano-zinc oxide antibacterial agent at a mass ratio of 5:1 were mixed and stirred at 1500 rpm for 15 min to obtain the first system. Silica sol (denoted as the second sol) and isopropanol were added to the first system, and the mixture was stirred and mixed at 1000 rpm for 45 min to obtain the antibacterial system.

[0155] The mass ratio of the second sol, isopropanol, and nano zinc oxide antibacterial agent is 20:10.02:1.

[0156] In step (2) of this comparative example, the mass ratio of the nine-functional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), and dispersion solvent (composed of 25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene, and 10 parts by weight of propylene glycol methyl ether) is the same as in Example 1.

[0157] Furthermore, the mass ratio of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0158] Comparative Example 4

[0159] This comparative example provides an anti-glare and antibacterial optical film. The difference between this comparative example and Example 1 is that step (1) is different. In this comparative example, propylene glycol methyl ether is used instead of isopropanol.

[0160] Comparative Example 5

[0161] This comparative example provides an anti-glare and antibacterial optical film. The difference between this comparative example and Example 1 is that the method for preparing the anti-glare and antibacterial optical film is different. The method for preparing the anti-glare and antibacterial optical film in this comparative example includes the following steps:

[0162] (1) Silica sol, isopropanol, nano zinc oxide antibacterial agent, nonfunctional polyurethane acrylic resin (i.e., acrylic resin), pentaerythritol hexaacrylate (i.e., acrylate monomer), IGM's PI-184 (i.e., photoinitiator), silica anti-glare particles (i.e., anti-glare component), polyether modified polydimethylsiloxane (i.e., polyether siloxane) and dispersion solvent (25 parts by weight of methyl isobutyl ketone, 10 parts by weight of butanone, 5 parts by weight of toluene and 10 parts by weight of propylene glycol methyl ether) were mixed and stirred at 1500 rpm for 180 min to obtain anti-glare and antibacterial coating liquid.

[0163] The mass ratios of the nine-functional polyurethane acrylate resin, pentaerythritol hexaacrylate, IGM's PI-184, silica anti-glare particles, and dispersing solvent were consistent with those in Example 1.

[0164] Furthermore, the mass ratio of silica sol, isopropanol, polyether-modified polydimethylsiloxane, and nano zinc oxide antibacterial agent is 25:10:0.02:1, and the mass percentage of nano zinc oxide antibacterial agent in the anti-glare and antibacterial coating is consistent with that in Example 1.

[0165] (2) Apply the anti-glare and antibacterial coating obtained in step (1) to the surface of the TAC film. After coating, heat and cure at 80°C for 2 minutes, then apply UV energy of 300 mJ / cm. 2 UV curing is performed.

[0166] Experimental Example

[0167] The anti-glare and antibacterial optical films provided in Examples 1-11 and Comparative Examples 1-5 were tested for antibacterial rate and optical performance. The test results are shown in Table 1.

[0168] Among them, the test parameters for optical performance include haze and transmittance. The transmittance and haze are tested in accordance with GB_T2410-2008; transmittance ≥90% and haze 25±5% indicate that the optical performance is qualified.

[0169] The antibacterial rate was tested according to GB / T31402-2015, "Test Method for Antibacterial Properties of Plastic Surfaces." The experimental strains were *Escherichia coli* ATCC8739 and *Staphylococcus aureus* ATCC6538P. The test subjects for the antibacterial rate were the anti-glare and antibacterial optical film before and after alkali treatment. The alkali treatment steps were as follows: the anti-glare and antibacterial optical film was immersed in an 8.5% sodium hydroxide aqueous solution at 50℃ for 1.6 min, washed with water, and then dried at 70℃. The antibacterial rate test steps were as follows: the cultured corresponding strains were placed on the test surface (the surface of the anti-glare and antibacterial coating away from the TAC film), and the survival rate of the strains was tested after the same time interval to obtain the antibacterial rate. The higher the antibacterial rate, the higher the antibacterial efficiency.

[0170] Table 1

[0171]

[0172]

[0173] As can be seen from Table 1, the optical performance of the anti-glare and antibacterial optical films of Examples 1 to 11 is qualified, and the antibacterial performance of the anti-glare and antibacterial optical films of Examples 1 to 11 is good before and after alkali treatment.

[0174] Specifically, when the components in the anti-glare and antibacterial coating formulations of Examples 1-7 are replaced with the same type of substance, for example, when silica sol is replaced with aluminum sol, isopropanol is replaced with propylene glycol, polyether-modified polydimethylsiloxane is replaced with polyether-modified heptamethyltrisiloxane, nano zinc oxide antibacterial agent is replaced with nano zirconium oxide antibacterial agent, and nine-functional polyurethane acrylic resin is replaced with six-functional polyurethane acrylic resin, the optical properties of the obtained anti-glare and antibacterial optical film and the antibacterial properties before and after alkali washing do not change significantly. The optical properties of the anti-glare and antibacterial optical film are all qualified, and the antibacterial properties before and after alkali treatment are both good.

[0175] As can be seen from Examples 1 and 8-11, by appropriately adjusting the amount of each component in the anti-glare and antibacterial coating formulation, the optical performance of the anti-glare and antibacterial optical film can be qualified and the antibacterial performance before and after alkali treatment can be good.

[0176] As can be seen from Comparative Examples 1-5, the optical performance of their anti-glare and antibacterial optical films is qualified, and the antibacterial rate before alkaline washing can also meet the requirements. However, after the alkaline washing process, the antibacterial rate will decrease significantly. In contrast, in Examples 1-11, the antibacterial rate before and after alkaline washing is above 99%, indicating that the antibacterial agent in the cured anti-glare and antibacterial coating in Examples 1-11 is effectively encapsulated and isolated, thus making the antibacterial agent in the anti-glare and antibacterial coating less susceptible to influence during the alkaline washing process. From the comparison between Comparative Examples 1-5 and Example 1, it can be seen that in order to achieve the effect of effectively encapsulating and isolating the antibacterial agent and solve the problem of the antibacterial agent being easily affected during the alkaline washing process, it is necessary to use sol to encapsulate the antibacterial agent twice, and both alcohol solvent and polyether siloxane are indispensable in the encapsulation process.

[0177] In summary, the preparation method of the anti-glare and antibacterial coating liquid provided in this application can ensure that the antibacterial agent is effectively encapsulated and isolated by the sol in the anti-glare and antibacterial coating liquid, so that the antibacterial agent in the anti-glare and antibacterial coating obtained by curing the anti-glare and antibacterial coating liquid is not easily affected during the alkaline washing process, and the anti-glare and antibacterial coating can effectively exert its antibacterial properties after alkaline treatment.

[0178] The embodiments described above are some, but not all, of the embodiments of this application. The detailed description of the embodiments of this application is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A method for preparing an anti-glare and antibacterial coating, characterized in that, include: The mixture is stirred, and the mixture comprises the following components by weight: 1 to 10 parts of antibacterial system, 15 to 40 parts of acrylic resin, 0.8 to 5 parts of anti-glare component and 20 to 200 parts of dispersion solvent. The method for preparing the antibacterial system includes: mixing a first sol with an antibacterial agent to obtain a first system; then mixing the first system, a second sol, an alcohol solvent, and a polyether siloxane; wherein the first sol and the second sol are each independently selected from at least one of silica sol, aluminum sol, and zirconium sol. The antibacterial agent is a photocatalytic antibacterial agent, and the antibacterial agent includes at least one of nano zinc oxide, nano zirconium oxide and nano titanium oxide.

2. The method for preparing the anti-glare and antibacterial coating liquid according to claim 1, characterized in that, The alcohol solvent includes at least one of isopropanol, propylene glycol, and cyclopentanol; Or / and, the acrylic resin includes at least one of polyurethane acrylic resin, silicone acrylic resin and polyester acrylic resin; Or / and, the dispersing solvent includes at least one of ethyl acetate, butyl acetate, toluene, xylene, acetone, butanone, cyclohexanone, methyl isobutyl ketone, propylene glycol methyl ether, propylene glycol ethyl ether, ethylene glycol butyl ether, propylene glycol butyl ether, butanediol butyl ether, and dipropylene glycol methyl ether; Or / and, the anti-glare component includes at least one of silica, polystyrene, polymethyl methacrylate and polybutyl methacrylate; Or / and, the particle size of the anti-glare component is 2.2μm~4.2μm.

3. The method for preparing the anti-glare and antibacterial coating liquid according to claim 1, characterized in that, The mass ratio of the first sol to the antibacterial agent is (5~10):1; Or / and, the mass ratio of the second sol to the antibacterial agent is (5~40):1; Or / and, the mass ratio of the alcohol solvent to the antibacterial agent is (3~100):1; Or / and, the mass ratio of the polyether siloxane to the antibacterial agent is (0.01~0.1):

1.

4. The method for preparing the anti-glare and antibacterial coating liquid according to any one of claims 1 to 3, characterized in that, The first mixing is carried out by a first stirring and mixing, the stirring speed is 500 rpm to 2000 rpm, and the stirring and mixing time is 10 min to 60 min; Or / and, the second mixing is carried out by a second stirring, the stirring speed of the second stirring is 500 rpm to 1000 rpm, and the stirring time of the second stirring is 30 min to 60 min.

5. The method for preparing the anti-glare and antibacterial coating liquid according to any one of claims 1 to 3, characterized in that, The mixed system also includes 1 to 4 parts of photoinitiator.

6. The method for preparing the anti-glare and antibacterial coating liquid according to any one of claims 1 to 3, characterized in that, The mixture also includes 0.01 to 0.15 parts of leveling agent.

7. The method for preparing the anti-glare and antibacterial coating liquid according to any one of claims 1 to 3, characterized in that, The mixture also includes 4 to 15 parts of acrylate monomers.

8. An anti-glare and antibacterial coating, characterized in that, The anti-glare and antibacterial coating is prepared using the method described in any one of claims 1 to 7.

9. An anti-glare and antibacterial coating, characterized in that, The anti-glare and antibacterial coating is the cured product of the anti-glare and antibacterial coating liquid according to claim 8.

10. An anti-glare and antibacterial optical film, characterized in that, include: A transparent substrate and the anti-glare and antibacterial coating of claim 9; the anti-glare and antibacterial coating covers the surface of the transparent substrate.

11. A method for preparing a polarizer, characterized in that, include: The anti-glare and antibacterial optical film of claim 10 is subjected to alkali treatment, cleaning and drying in sequence. Then, the optical film layer and the dried anti-glare and antibacterial optical film are laminated with the polyvinyl alcohol film layer so that the anti-glare and antibacterial optical film and the optical film layer respectively cover the two opposite surfaces of the polyvinyl alcohol film layer. The anti-glare and antibacterial coating is located on the side of the transparent substrate away from the polyvinyl alcohol film layer; The alkaline treatment step includes immersing the anti-glare and antibacterial optical film in an alkaline solution.

12. A polarizer, characterized in that, The polarizer is prepared by the method for preparing the polarizer as described in claim 11.

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