Anti-sticking AG coating liquid as well as preparation method and application thereof

Abstract

The invention relates to anti-sticking AG coating liquid as well as a preparation method and application thereof. The anti-sticking AG coating liquid is prepared from the following raw materials in parts by weight: 30 to 40 parts of acrylic resin, 15 to 25 parts of acrylate monomer, 5 to 15 parts of thickening agent mother liquor, 0.1 to 1 part of organic particles, 0.1 to 0.5 part of wetting agent, 1 to 3 parts of initiator and 20 to 40 parts of solvent A. According to the anti-sticking AG coating liquid disclosed by the invention, the anti-sticking AG coating liquid is subjected to formula design and processing technology optimization, so that the optical performance of the anti-sticking AG coating liquid is not influenced, and meanwhile, the problem of film sticking after the traditional AG coating liquid is coated and rolled is solved.

Description

Technical Field

[0001] This invention relates to the field of optical materials technology, and in particular to an anti-sticking AG coating liquid, its preparation method, and its application. Background Technology

[0002] Polarizers play a central role in liquid crystal display (LCD) imaging technology, serving as a key optical component of LCDs. Their function permeates the entire imaging process, directly impacting display quality, contrast, and visibility, making them extremely crucial. They typically consist of a multi-layered structure including a PVA film, top and bottom base films, a protective film, a release film, and pressure-sensitive adhesive. Widely used in LCD imaging, their structural design directly affects polarization efficiency, durability, and display performance. The top base film usually uses an AG (Anti-Glare) film. AG films offer optical enhancement, physical protection, and functional expansion, effectively protecting the PVA while significantly improving the display effect, durability, and user experience of the polarizer, making them a key component in high-performance polarizer design.

[0003] Currently, conventional AG films generally have a three-layer structure: a base film and coatings attached to the upper and lower surfaces. The lower surface is a primer coating, which improves the adhesion of the AG film to the PVA film. The upper surface is the AG layer, which plays an important role in the durability of the polarizer, display effect, and user visual experience.

[0004] However, the current traditional AG liquid (such as the AG coating liquid composition provided by CN116716023A) will have a film sticking problem after being coated on PVA film and then wound up. The film sticking of the anti-glare film will cause irreversible effects in the polarizer manufacturing process (such as film breakage during unwinding). At the same time, a large number of bubbles usually appear during the stirring process of AG liquid preparation, which will affect the film quality during the coating process and seriously affect the production capacity, performance and use effect of polarizer.

[0005] Therefore, finding an anti-sticking AG liquid that can solve the adhesion problem without affecting the optical performance of polarizers has become an urgent problem to be solved. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides an anti-sticking AG coating liquid, its preparation method, and its application. By designing the formulation and optimizing the processing technology of the anti-sticking AG coating liquid, the problem of film adhesion after traditional AG liquid coating and winding is solved without affecting its optical performance.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] In a first aspect, the present invention provides an anti-adhesive AG coating liquid, wherein the raw materials for preparing the anti-adhesive AG coating liquid include, by weight, 30-40 parts of acrylic resin, 15-25 parts of acrylate monomer, 5-15 parts of thickener mother liquor, 0.1-1 parts of organic particles, 0.1-0.5 parts of wetting agent, 1-3 parts of initiator and 20-40 parts of solvent A.

[0009] The components include: 30-40 parts of acrylic resin (e.g., 30, 32, 34, 35, 36, 38, or 40 parts); 15-25 parts of acrylate monomer (e.g., 15, 16, 18, 20, 22, 24, or 25 parts); 5-15 parts of thickener mother liquor (e.g., 5, 6, 8, 10, 12, 14, or 15 parts); and 0.1-1 parts of organic particles. For example, the amount of each component can be 0.1, 0.2, 0.4, 0.5, 0.6, 0.8, or 1 part; the amount of each wetting agent can be 0.1-0.5 parts, for example, 0.1, 0.2, 0.4, or 0.5 parts; the amount of each initiator can be 1-3 parts, for example, 1.5, 2, 2.5, or 3 parts; and the amount of each solvent A can be 20-40 parts, for example, 20, 25, 30, 35, or 40 parts.

[0010] This invention addresses the adhesion problem that occurs after coating and winding of traditional AG liquids by designing an anti-sticking AG coating solution, without affecting its optical properties. It utilizes acrylic resin combined with acrylate monomers to balance the mechanical properties, film surface condition, and processing performance of the cured AG layer. A wetting agent and thickener masterbatch synergistically enhance the anti-sticking ability of the AG coating solution. The wetting agent provides surface energy, microscopic slip, and chemical inertness, while the thickener masterbatch optimizes the fluidity and stability of the AG coating solution, improving coating uniformity and preventing surface defects. The wetting agent also has an anti-foaming effect, indirectly disrupting bubble stability and causing bubble rupture by reducing the surface tension and regulating interfacial activity, thus inhibiting bubble formation and preventing bubbles in the subsequent AG coating solution from affecting the coating effect. Organic particles are used to enhance the anti-glare performance of the AG coating solution.

[0011] Preferably, the acrylic resin comprises polyurethane acrylate and / or acrylic (ester) copolymer.

[0012] Preferably, the acrylate monomer includes any one or a combination of at least two of 4-hydroxybutyl acrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, or dipentaerythritol hexaacrylate.

[0013] Preferably, the organic particles comprise polymethyl methacrylate and / or polyethylene glycol dimethacrylate.

[0014] Preferably, the D50 particle size of the organic particles is 0.5-2.5 μm, for example, it can be 0.5 μm, 1 μm, 2 μm or 2.5 μm.

[0015] Preferably, the wetting agent includes an organosilicon wetting agent.

[0016] Preferably, the wetting agent can be selected from BYK-346 from BYK Chemicals and / or TEGO270 from Essen, Germany.

[0017] Preferably, the initiator includes a photoinitiator.

[0018] Preferably, the photoinitiator comprises 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone.

[0019] Preferably, solvent A comprises toluene and / or butanone.

[0020] Preferably, solvent A comprises a combination of toluene and butanone.

[0021] Preferably, the mass ratio of toluene to methyl ethyl ketone is 1:(0.2-1.5), for example, it can be 1:0.2, 1:0.4, 1:0.5, 1:0.6, 1:0.8, 1:1, 1:1.2, 1:1.4 or 1:1.5, etc.

[0022] Preferably, the thickener mother liquor is prepared by the following preparation method, the preparation method comprising:

[0023] Solvent B is mixed with thickener, and the mixture is homogenized and filtered to obtain the thickener stock solution.

[0024] Preferably, the ratio of solvent B to thickener is 1:(0.01-0.1), for example, it can be 1:0.01 or 1:0.

[0025] 02, 1:0.04, 1:0.05, 1:0.06, 1:0.08, or 1:0.1, etc.

[0026] Preferably, solvent B comprises toluene.

[0027] Preferably, the thickener comprises organobentonite.

[0028] Preferably, the mixing and homogenization are both carried out under stirring.

[0029] Preferably, the homogenization includes a first homogenization and a second homogenization.

[0030] Preferably, the stirring directions of the first homogenization and the second homogenization are opposite.

[0031] Preferably, the rotational speeds of the first and second homogenizations are each ≥2500 r / min, for example, 2500 r / min, 3000 r / min, 3500 r / min, 4000 r / min, 4500 r / min or 5000 r / min, etc.

[0032] Preferably, the time for the first homogenization and the second homogenization are each ≥10 min independently, for example, 10 min, 15 min, 20 min, 25 min or 30 min.

[0033] Preferably, the filtration step includes circulating the filter for 30-60 minutes (e.g., 30 minutes, 40 minutes, 50 minutes, or 60 minutes) using a circulating filter with a 3-6 μm (e.g., 3 μm, 4 μm, 5 μm, or 6 μm) filter element.

[0034] Preferably, the raw materials for preparing the anti-stick AG coating liquid further include 1-3 parts by weight of leveling agent, for example, 1 part, 1.5 parts, 2 parts, 2.5 parts or 3 parts, etc.

[0035] Preferably, the leveling agent comprises a polyether siloxane copolymer and / or a polyacrylate.

[0036] Preferably, the leveling agent is selected from any one or a combination of at least two of Evonik PC4100, BYK-331, or BYK-354.

[0037] In a second aspect, the present invention provides a method for preparing the anti-adhesive AG coating liquid as described in the first aspect, the preparation method comprising the following steps:

[0038] The raw materials for preparing the anti-stick AG coating liquid are mixed and reacted to obtain the anti-stick AG coating liquid.

[0039] Preferably, the mixing process includes first mixing solvent A, thickener stock solution, organic particles and initiator to obtain a premix, and then sequentially adding acrylic resin, acrylate monomer, wetting agent and optional leveling agent to the premix for reaction.

[0040] Preferably, both the mixing and the reaction are carried out under stirring.

[0041] Preferably, the mixing and reaction are carried out in opposite directions.

[0042] Preferably, the mixing speed is ≥1200 r / min, for example, it can be 1200 r / min, 1300 r / min, 1400 r / min or 1500 r / min, etc.

[0043] Preferably, the mixing time is 10-20 min, for example, it can be 10 min, 12 min, 14 min, 15 min, 16 min, 18 min or 20 min.

[0044] Preferably, the mixing process further includes a filtration step.

[0045] Preferably, the filtration step includes circulating the filter for 30-60 minutes (e.g., 30 minutes, 40 minutes, 50 minutes, or 60 minutes) using a circulating filter with a 3-6 μm (e.g., 3 μm, 4 μm, 5 μm, or 6 μm) filter element.

[0046] Preferably, the stirring speed of the reaction is ≥2300 r / min, for example, it can be 2300 r / min, 2400 r / min, 2500 r / min, 2600 r / min or 2700 r / min, etc.

[0047] Preferably, the reaction time is 20-40 min, for example, 20 min, 25 min, 30 min, 35 min or 40 min.

[0048] This invention optimizes the processing technology of the anti-stick AG coating liquid, providing an anti-stick AG coating liquid with good stability and dispersibility, less prone to agglomeration and easy to coat, thus avoiding affecting the subsequent coating effect.

[0049] Thirdly, the present invention provides an anti-glare film, the anti-glare film comprising a base layer, a substrate layer and an AG layer stacked sequentially;

[0050] The AG layer is obtained by curing the anti-sticking AG coating liquid described in the first aspect.

[0051] Preferably, the substrate layer is made of any one or a combination of at least two of PMMA film, TAC film, or PET film.

[0052] Preferably, the thickness of the base coating is 100-500 nm, for example, it can be 100 nm, 200 nm, 300 nm, 400 nm or 500 nm.

[0053] The present invention does not limit the material of the base coating, which can be a conventional commercially available anti-glare film base coating.

[0054] Preferably, the thickness of the substrate layer is 10-100 μm, for example, it can be 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm or 100 μm.

[0055] Preferably, the thickness of the AG layer is 2-10 μm, for example, it can be 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm, etc.

[0056] Preferably, the curing process further includes a drying step.

[0057] Preferably, the drying temperature is 60-120℃, for example, 60℃, 70℃, 80℃, 90℃, 100℃, 110℃ or 120℃, and the drying time is 1-3 min, for example, 1 min, 1.5 min, 2 min, 2.5 min or 3 min.

[0058] Preferably, the curing is carried out under ultraviolet light irradiation.

[0059] Preferably, the curing is performed by mercury lamp irradiation.

[0060] Preferably, the energy density of the mercury lamp is 100-500 mJ / cm³. 2 For example, it could be 100 mJ / cm 2 200 mJ / cm 2 300 mJ / cm 2 400 mJ / cm 2 Or 500 mJ / cm 2 wait.

[0061] Preferably, the curing time is 3-8 seconds, for example, 3 seconds, 4 seconds, 5 seconds, 6 seconds, 7 seconds or 8 seconds.

[0062] Fourthly, the present invention provides a polarizer, the polarizer comprising an anti-glare film and a polarizing film layer as described in the third aspect;

[0063] The anti-glare film is disposed on one or both sides of the polarizing film layer.

[0064] Preferably, the polarizing film layer is made of PVA film.

[0065] Compared with the prior art, the present invention has at least the following beneficial effects:

[0066] This invention solves the problem of film adhesion after coating and winding of traditional AG liquid by designing the formula and optimizing the processing technology of the anti-sticking AG coating liquid without affecting its optical performance. The provided anti-sticking AG coating liquid has excellent anti-sticking performance, good stability and dispersibility, is not prone to agglomeration and is easy to coat. The anti-glare film and polarizer prepared from it have excellent optical performance and weather resistance. Attached Figure Description

[0067] Figure 1 This is a photograph of the anti-sticking AG coating liquid provided in Embodiment 1 of the present invention after being coated on one side of PMMA and cured.

[0068] Figure 2 This is a photograph of the anti-sticking AG coating liquid provided in Comparative Example 6 of the present invention after being coated on one side of PMMA and cured.

[0069] Figure 3 This is a photograph of the anti-sticking AG coating liquid provided in Comparative Example 4 of the present invention after being coated on one side of PMMA and cured.

[0070] Figure 4 This is a schematic diagram of the adhesive film condition after a blocking test of the anti-adhesive AG coating liquid provided in Embodiment 1 of the present invention;

[0071] Figure 5 This is a schematic diagram of the adhesive film condition after a blocking test of the anti-sticking AG coating liquid provided in Comparative Example 1 of this invention.

[0072] Figure 6 This is a schematic diagram of the adhesive film after a blocking test of the anti-adhesive AG coating liquid provided in Comparative Example 5 of this invention. Detailed Implementation

[0073] To facilitate understanding of the present invention, the following embodiments are provided. Those skilled in the art should understand that these embodiments are merely illustrative and should not be construed as limiting the scope of the invention.

[0074] The specific information of the materials used in the following specific embodiments of the present invention is as follows:

[0075] Polyurethane acrylate, SW-3673, purchased from Guangzhou Sanwang Chemical Materials Co., Ltd.

[0076] Acrylic (ester) copolymer, Acryft EMMA WD106, purchased from Sumitomo Chemical, Japan;

[0077] Acrylate monomer, PET3A Miwon M340, purchased from Miwon Chemical, South Korea;

[0078] Organic particles, SSX-103DXE, purchased from Sekisui Chemicals;

[0079] Wetting agent, BYK-346, purchased from BYK Chemicals;

[0080] Wetting agent, TEGO 270, purchased from Essen, Germany;

[0081] Leveling agent, PC4100, purchased from Evonik, Germany;

[0082] Leveling agent, BYK-331, purchased from BYK Chemicals;

[0083] Thickener stock solution: The thickener stock solutions used in the following examples and comparative examples were all prepared by the following preparation method, which includes:

[0084] By weight, 95 parts of toluene solution were placed in a homogenizer. The homogenizer was turned on in reverse and the stirring speed was 2800 r / min. After stirring started, 5 parts of organobentonite (purchased from Ningbo Formosa Plastics) were added. After the addition was completed and stirring was completed for 10 min, the homogenizer was turned on forward and the stirring speed was 2800 r / min. Stirring was continued for 10 min. After stirring was completed, the homogenizer was connected to a circulating filter device with a 5 μm filter element. The filter was circulated for 1 h to obtain the thickener mother liquor.

[0085] Example 1

[0086] This embodiment provides an anti-adhesion AG coating liquid and its preparation method. The raw materials for preparing the anti-adhesion AG coating liquid include, by weight, 35 parts of polyurethane acrylate, 20 parts of acrylate monomer, 10 parts of thickener mother liquor, 0.5 parts of organic particles, 0.3 parts of wetting agent BYK-346, 2 parts of leveling agent PC4100, 2 parts of 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone, 20 parts of toluene, and 10 parts of butanone.

[0087] The preparation method includes:

[0088] By weight, toluene, methyl ethyl ketone, thickener stock solution, organic particles, and 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone were added sequentially into the reaction vessel. The reaction was reversed at 1500 rpm / min for 15 min. Then, polyurethane acrylate, acrylate monomer, wetting agent BYK-346, and leveling agent PC4100 were added sequentially into the reactor. The reaction was forward rotated at 2500 r / min for 30 min. The reaction vessel was then connected to a circulating filter device with a 5 μm filter element and the filter was circulated for 40 min to obtain the anti-stick AG coating liquid.

[0089] Example 2

[0090] This embodiment provides an anti-adhesion AG coating liquid and its preparation method. The raw materials for preparing the anti-adhesion AG coating liquid include, by weight, 40 parts of polyurethane acrylate, 15 parts of acrylate monomer, 15 parts of thickener mother liquor, 0.3 parts of organic particles, 0.1 parts of wetting agent TEGO270, 3 parts of leveling agent PC4100, 3 parts of 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone, 15 parts of toluene, and 25 parts of butanone.

[0091] The preparation method includes:

[0092] By weight, toluene, methyl ethyl ketone, thickener stock solution, organic particles, and 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone were added sequentially into the reaction vessel. The reaction was reversed at 1800 rpm / min for 10 min. Then, polyurethane acrylate, acrylate monomer, wetting agent TEGO270, and leveling agent PC4100 were added sequentially to the reactor. The reaction was forward rotated at 2800 r / min for 20 min. The reaction vessel was then connected to a circulating filter device with a 3 μm filter element and the filter was circulated for 0.5 h to obtain the anti-sticking AG coating liquid.

[0093] Example 3

[0094] This embodiment provides an anti-adhesion AG coating liquid and its preparation method. The raw materials for preparing the anti-adhesion AG coating liquid include, by weight, 30 parts of acrylic (ester) copolymer, 25 parts of acrylate monomer, 10 parts of thickener mother liquor, 0.8 parts of organic particles, 0.5 parts of wetting agent BYK-346, 1 part of leveling agent BYK-331, 1 part of 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone, 5 parts of toluene, and 15 parts of butanone.

[0095] The preparation method includes:

[0096] By weight, toluene, methyl ethyl ketone, thickener stock solution, organic particles, and 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholino)-1-propanone were added sequentially into the reaction vessel. The reaction was reversed at 1200 rpm / min for 20 min. Then, acrylic (ester) copolymer, acrylate monomer, wetting agent BYK-3460, and leveling agent BYK-331 were added sequentially into the reactor. The reaction was forward rotated at 2300 r / min for 40 min. The reaction vessel was then connected to a circulating filter device with a 6 μm filter element and the mixture was circulated and filtered for 1 h to obtain the anti-sticking AG coating liquid.

[0097] Examples 4-5 and Comparative Examples 1-5

[0098] Examples 4-5 and Comparative Examples 1-5 respectively provide an anti-adhesive AG coating liquid and its preparation method. The difference from Example 1 is that the raw material formula for the preparation of the anti-adhesive AG coating liquid is different, as shown in Table 1 (the amount of each component in Table 1 is by weight), where "--" indicates that the component was not added.

[0099] The preparation method of the anti-sticking AG coating liquid is the same as in Example 1.

[0100] Table 1

[0101]

[0102] Comparative Example 6

[0103] This comparative example provides an anti-sticking AG coating liquid and its preparation method. The difference from Example 1 is that the thickener mother liquor is replaced in equal amounts with a mixture of toluene and organic bentonite.

[0104] The mixture of toluene and organobentonite was prepared by the following method:

[0105] A mixture of 95 parts toluene and 5 parts organobentonite was mixed at 2500 r / min for 20 min to obtain the mixture of toluene and organobentonite.

[0106] Comparative Example 7

[0107] This comparative example provides an anti-adhesion AG coating liquid and its preparation method, which differs from Example 1 in that: the preparation method of the anti-adhesion AG coating liquid includes:

[0108] By weight, toluene, methyl ethyl ketone, thickener stock solution, organic particles and initiator are added sequentially into the reaction vessel and stirred at 1200 rpm / min for 15 min. Then, acrylic resin, acrylate monomer, wetting agent and leveling agent are added sequentially into the reactor and reacted at 1200 r / min for 30 min to obtain the anti-sticking AG coating liquid. The stirring direction is consistent throughout the process.

[0109] Test methods

[0110] The anti-adhesion AG coating solutions provided in Examples 1-5 and Comparative Examples 1-7 were coated onto one side of a PMMA film (40 µm, purchased from HMT), and then dried at 100°C for 2 min, followed by drying at 300 mJ / cm. 2 Curing was performed under a mercury lamp for 6 seconds, followed by the following performance tests:

[0111] (1) Transmittance (%): Tested using an NDH 8000 haze meter;

[0112] (2) Haze (%): Tested using an NDH 8000 haze meter;

[0113] (3) Water contact angle (°): Tested using a Dmo-502 contact angle meter;

[0114] (4) Adhesion: The coating was tested by cross-cutting and sticking-peeling with a cross-cutting knife and Michelin tape, according to ISO2409. The adhesion deteriorated from level 0 to level 5.

[0115] (5) Membrane surface condition: Observe whether there are any defects such as orange peel or wrinkles on the membrane surface. If no defects are found, it is OK.

[0116] (6) Blocking test:

[0117] The anti-adhesion AG coating solutions provided in Examples 1-5 and Comparative Examples 1-7 were coated onto one side of a PMMA film (40 µm, purchased from HMT), dried at 100°C for 2 min, and then subjected to 300 mJ / cm² coating. 2 The film was cured under a mercury lamp for 6 seconds, and a composite film was obtained after curing.

[0118] To simulate the winding process, two composite films are aligned and stacked together, with one side of the bonding surface being the AG surface and the other side being the non-AG surface. The bonded structure is then placed between the two pieces of glass.

[0119] Take a 1 kg weight and place it in the center of the upper glass structure after bonding. Then place it in a TH3-KE-065 constant temperature and humidity chamber with conditions set at 50℃ and 90%RH. After 12 hours, take it out and observe the adhesion of the membrane. If there is no adhesion, it is OK.

[0120] The test results are shown in Table 2 below:

[0121] Table 2

[0122]

[0123] The test results show that:

[0124] (1) As can be seen from Examples 1 to 5, the present invention, through formulation design and optimized processing of the anti-stick AG coating liquid, solves the film sticking problem existing after traditional AG liquid coating and winding without affecting its optical performance. Figure 1 and Figure 4It can be seen that the anti-sticking AG coating liquid prepared in Example 1 of the present invention has a smooth surface without wrinkles or orange peel after curing on one side of PMMA, and no sticking problem occurs after blocking test.

[0125] (2) Through Examples 1 and 4-5 and Comparative Examples 1-3, and Figure 5 (Comparative Example 1) It can be seen that the film after the blocking test of the anti-adhesive AG coating liquid provided in Comparative Example 1 of the present invention has a slight adhesion problem. The present invention introduces an appropriate amount of wetting agent into the anti-adhesive AG coating liquid formula, which significantly improves the contact angle of the finished AG film after coating, enhances the anti-adhesive performance, and improves the appearance abnormality. If the AG coating liquid without wetting agent has a high surface tension, it is easy to form pore defects or agglomerate on the substrate surface during coating, resulting in a small actual contact area between the AG film and the substrate and uneven spreading, which affects the adhesion and adhesion problem. However, if the amount of wetting agent added is further increased, the performance improvement of the AG film is limited, and the excessive wetting agent cannot fully participate in film formation. It remains inside the AG film or at the interface between the coating film and the substrate, which will destroy the crosslinking density of the AG film, reduce the cohesion of the AG film and the interfacial bonding force with the substrate, and seriously affect its adhesion ability.

[0126] (3) Through Example 1 and Comparative Examples 4-5 and from Figure 3 (Response ratio 4) Figure 6 (Comparative Example 5) It can be seen that the anti-sticking AG coating liquid provided in Comparative Example 4 of the present invention exhibits severe orange peel-like defects on the surface after curing when coated on one side of PMMA; the anti-sticking AG coating liquid provided in Comparative Example 5 of the present invention exhibits severe adhesion problems after a blocking test. The present invention, by introducing an appropriate amount of thickener stock solution into the anti-sticking AG coating liquid formulation, can effectively improve the abnormal appearance of the AG film by balancing the viscosity and leveling properties of the AG coating liquid. Furthermore, the combination of the thickener stock solution and the wetting agent improves the coating uniformity of the AG film, prevents surface appearance defects of the AG film after coating, and can further synergistically improve the anti-sticking performance of the AG film.

[0127] (4) Through Example 1 and Comparative Examples 6-7 and from Figure 2 (Comparative Example 6) It can be seen that after the anti-stick AG coating liquid provided by Comparative Example 6 is coated on one side of PMMA and cured, a slight orange peel effect appears on the surface. The present invention optimizes the processing technology of the anti-stick AG coating liquid. By adopting the processing methods of "bidirectional high-speed homogenization" and "multi-stage circulation filtration", the AG coating liquid has good stability and dispersibility, is not prone to agglomeration, and is easier to coat, thus avoiding affecting the subsequent coating effect.

[0128] The applicant declares that the above description is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention fall within the protection and disclosure scope of the present invention.

Claims

1. An anti-sticking type AG coating liquid, characterized by, The preparation raw materials of the anti-sticking AG coating liquid include, by weight fraction, 30-40 parts of acrylic resin, 15-25 parts of acrylic ester monomer, 5-15 parts of thickening agent mother liquor, 0.1-1 part of organic particle, 0.1-0.5 part of wetting agent, 1-3 parts of initiator and 20-40 parts of solvent A.

2. The anti-sticking type AG coating solution according to claim 1, characterized by, The acrylic resin includes polyurethane acrylate and / or acrylic copolymer; Preferably, the acrylic ester monomer includes any one or a combination of at least two of 4-hydroxybutyl acrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate or dipentaerythritol hexaacrylate; Preferably, the organic particle includes polymethyl methacrylate and / or polyethylene glycol dimethacrylate; Preferably, the D50 particle size of the organic particle is 0.5-2.5 μm; Preferably, the wetting agent includes silicone-based wetting agent; Preferably, the initiator includes photoinitiator; Preferably, the photoinitiator includes 2-methyl-1-[4-(methylthio)phenyl]-2-(4-morpholinyl)-1-propanone; Preferably, the solvent A includes toluene and / or butanone; Preferably, the solvent A includes a combination of toluene and butanone; Preferably, the mass ratio of toluene to butanone is 1: (0.2-1.5).

3. The anti-sticking type AG coating liquid according to claim 1 or 2, characterized by, The thickening agent mother liquor is prepared by a preparation method, which includes: The solvent B is mixed with the thickening agent, and after homogenization and filtration, the thickening agent mother liquor is obtained; Preferably, the ratio of the solvent B to the thickening agent is 1: (0.01-0.1); Preferably, the solvent B includes toluene; Preferably, the thickening agent includes organic bentonite; Preferably, the mixing and homogenization are both under stirring; Preferably, the homogenization includes first homogenization and second homogenization; Preferably, the stirring directions of the first homogenization and the second homogenization are opposite; Preferably, the rotation speeds of the first homogenization and the second homogenization are each independently ≥2500 r / min; Preferably, the time of the first homogenization and the second homogenization is each independently ≥10 min; Preferably, the filtration step includes circulating filtration for 30-60 min using a circulating filter with a filter core of 3-6 μm.

4. The anti-sticking AG coating solution according to any one of claims 1 to 3, wherein The preparation raw materials of the anti-sticking AG coating liquid further include, by weight fraction, 1-3 parts of leveling agent; Preferably, the leveling agent includes polyether siloxane copolymer and / or polyacrylate.

5. A method for preparing the anti-sticking AG coating solution according to any one of claims 1 to 4, characterized by, The preparation method includes the following steps: The preparation raw materials of the anti-sticking AG coating liquid are mixed, and reaction is performed to obtain the anti-sticking AG coating liquid.

6. The method of claim 5, wherein the anti-sticking AG coating solution is prepared by adding 0.1 to 0.5 parts by weight of the anti-sticking agent to 100 parts by weight of the AG solution. The mixing includes first mixing the solvent A, the thickening agent mother liquor, the organic particle and the initiator to obtain a premix, and then sequentially adding the acrylic resin, the acrylic ester monomer, the wetting agent and the optional leveling agent to the premix for reaction; Preferably, the mixing and reaction are both under stirring; Preferably, the stirring directions of the mixing and reaction are opposite; Preferably, the stirring speed of the mixing is ≥1200 r / min; Preferably, the time of the mixing is 10-20 min; Preferably, the mixing is followed by a filtering step; Preferably, the filtering step comprises circulating filtration for 30-60 min using a circulating filter with a filter core of 3-6 μm; Preferably, the stirring speed of the reaction is ≥ 2300 r / min; Preferably, the reaction time is 20-40 min.

7. An anti-glare film characterized by, The anti-glare film comprises a bottom coating layer, a substrate layer and an AG layer which are sequentially stacked; The AG layer is obtained by curing the anti-sticking AG coating liquid according to any one of claims 1-4.

8. The anti-glare film according to claim 7, characterized by The material of the substrate layer comprises any one or a combination of at least two of PMMA film, TAC film or PET film; Preferably, the curing is preceded by a drying step; Preferably, the drying temperature is 60-120℃ and the drying time is 1-3 min; Preferably, the curing is performed under ultraviolet light irradiation; Preferably, the curing is performed using a mercury lamp; Preferably, the energy density of the mercury lamp is 100-500 mJ / cm 2 ; Preferably, the curing time is 3-8 s.

9. A polarizing sheet characterized by comprising: The polarizing sheet comprises the anti-glare film according to claim 7 or 8 and a polarizer film layer; The anti-glare film is arranged on one side or both sides of the polarizer film layer.

10. The polarizing sheet according to claim 9, wherein The material of the polarizer film layer comprises PVA film.

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