Anti-aging polarization shading device, preparation method and application thereof, and head-up display panel

Abstract

The invention provides an anti-aging polarization shading device, a preparation method and application thereof, and a head-up display panel. The anti-aging polarization shading device comprises an anti-fouling hardened layer, an anti-light-aging layer, a base material layer, a first OCA layer, a polaroid, a second OCA layer and a thermal expansion balance layer which are stacked in sequence. The anti-aging polarization shading device is applied to the head-up display panel, can guarantee the emergent intensity of a head-up display image light source (polarized light), can still guarantee the color uniformity even if the precision of an installation optical axis is poor, can shield the burning loss of internal optical devices caused by external visible light, can shield and hide the internal optical devices, and improves the quality of the head-up display panel. And the scratch resistance and the dirt resistance are remarkably improved, and the fitting performance of the curved surface is fully guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of head-up display panels, and in particular to an anti-aging polarized shading device, a preparation method and application thereof, and a head-up display panel. Background Art

[0002] The head-up display (HUD) system, also known as the parallel display system, projects important driving information such as speed and navigation onto the windshield in front of the driver or other display devices, so that the driver can see important driving information such as speed and navigation without lowering or turning his head. Polaroid is an indispensable raw material for liquid crystal display panels. It is thin and has high requirements for the performance of the polaroid itself. There are also certain requirements for the light transmittance, stability, durability, and weather resistance of the optical glue, absorption layer, and hardening layer used for the polaroid.

[0003] In particular, the curved screen has a beautiful appearance and can achieve an ultra-high screen-to-body ratio when viewed straight on. However, the four corner areas where the curved surfaces intersect form a curved surface with a certain spherical angle. The stress and strain in this area are unevenly distributed in the two-dimensional direction and are anisotropic. If the composite properties of the optical adhesive, absorption layer, and hardening layer used in the polarizer are poor, it will lead to serious problems such as lamination wrinkles, insufficient contact, easy stratification, and easy generation of gaps. The hardness of the use layer of the polarization shading devices currently on the market is generally not very high, and scratches are easily generated by friction or relatively large impact. The overall structural curing strength is poor, and the stability, durability, and aging resistance are poor, resulting in a short service life. In addition, most of the polarizers available on the market are for indoor use, without considering harsh conditions such as strong ultraviolet rays outdoors and high temperatures exposed to sunlight in the car, which limits the application of polarizers.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-aging polarized shading device, a preparation method and application thereof, and a head-up display panel. The anti-aging polarized shading device is applied to the head-up display panel, which can ensure the emission intensity of the head-up display image light source (polarized light), and can ensure the uniformity of color even if the installation optical axis accuracy is poor. At the same time, it can also shield the external visible light from burning the internal optical devices, shield and hide the internal optical devices, and significantly improve the scratch resistance and anti-fouling ability, and fully ensure the bonding performance of the curved surface. The present invention aims to improve the anti-aging property of the polarizer and enhance its conformality in the case of curved surfaces.

[0006] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted: In a first aspect, the present invention provides an anti-aging polarized shading device, the anti-aging polarized shading device comprising an anti-fouling hardening layer, an anti-light aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer and a thermal expansion balance layer stacked in sequence; Wherein, the antifouling hardening layer comprises a composite acrylic resin and an antifouling additive in a mass ratio of 100:(0.1-10).

[0007] Preferably, the raw materials for preparing the composite acrylic resin include, by weight: 5-15 parts of pentaerythritol triacrylate, 15-25 parts of isobornyl acrylate, 25-35 parts of polyurethane acrylate, 1-10 parts of tetraethylene glycol diacrylate, 10-20 parts of tetrahydrofurfuryl acrylate, N,N -10~20 parts of dimethyl acrylamide and 0.5~3 parts of light curing agent.

[0008] Preferably, the antifouling additive comprises a fluoropolymer.

[0009] Preferably, the photocuring agent is selected from any one of benzophenone, 2-isopropylthioxanthone, dimethylbenzil ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, 2-hydroxy-2-methyl-1-phenyl-1-propanone or 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, or a combination of at least two thereof.

[0010] Preferably, the composite acrylic resin further comprises: 0.5 to 3 parts of an antioxidant.

[0011] Preferably, the antioxidant is selected from the group consisting of β Any one of pentaerythritol-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, dilauryl thiodipropionate, dioctadecyl pentaerythritol diphosphite, tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylene diphosphate or dilauryl thiodipropionate or a combination of at least two thereof.

[0012] Preferably, the antifouling additive is selected from any one or a combination of at least two of perfluoropolyether, polyfluorosiloxane, bis(trimethoxysilylpropylcarbamate)perfluoropolyether, perfluorodecyltriethoxysilane, perfluorodecyltriethoxysilane or perfluorooctyltrimethoxysilane.

[0013] Preferably, the antifouling hardened layer has a thickness of 1 to 15 μm.

[0014] Preferably, the raw materials for preparing the anti-light aging layer include, by weight: 10-20 parts of polyhydroxy acrylic resin, 1-10 parts of isocyanate curing agent, 0-20 parts of infrared absorber, 1-10 parts of ultraviolet absorber, 0.1-5 parts of surfactant, and 60-80 parts of composite solvent.

[0015] Preferably, the composite solvent comprises a high molecular weight solvent and a low molecular weight solvent in a mass ratio of (8.5-9.8):(0.2-1.5).

[0016] Preferably, the high molecular weight solvent comprises N - any one of methyl-2-pyrrolidone, cyclohexanone or xylene, or a combination of at least two thereof.

[0017] Preferably, the small molecular weight solvent includes any one of isopropanol, butanone or ethyl acetate, or a combination of at least two thereof.

[0018] Preferably, the surfactant is selected from any one or a combination of at least two of alkyl sulfates of C12 or higher, linear alcohol polyoxyethylene ether sulfates, sulfated triglycerides, polyoxyethylene alkylphenols, linear alcohol polyoxyethylene ethers, polyether-modified polydimethylsiloxanes or polyureas.

[0019] Preferably, the hydroxyl value of the polyhydroxy acrylic resin is 10-150 mgKOH / g.

[0020] Preferably, the polyhydroxy acrylic resin is selected from any one of HU840K of Laiyang Hongan, HA865 of Kunshan Custer, LR7601 of Mitsubishi or DS-2055 of Nantong Baisen Chemical, or a combination of at least two thereof.

[0021] Preferably, the isocyanate curing agent is selected from hexamethylene diisocyanate and / or isophorone diisocyanate.

[0022] Preferably, the isocyanate curing agent is selected from any one of BASF HDI type N3300, BASF IPDI type XP2400, Wanhua HDI 200, Wanhua IPDI 200, Covestro HDI type L75 or Covestro IPDI type I100, or a combination of at least two thereof.

[0023] Preferably, the infrared absorber comprises an organic dye and a metal oxide in a mass ratio of (0.05-2):(8-10).

[0024] Preferably, the organic dye is selected from indole near-infrared fluorescent organic dyes, and the metal oxide is selected from nano rare earth metal oxide powders.

[0025] Preferably, the organic dye is selected from any one of IR780, IR820, IR956, IR1008 or IR1086, or a combination of at least two thereof.

[0026] Preferably, the particle size of the nano rare earth metal oxide powder is 20-50 nm.

[0027] Preferably, the specific surface area of ​​the nano rare earth metal oxide powder is 30-60 m 2 / g.

[0028] Preferably, the metal oxide is selected from any one of tungsten oxide, tungsten-cesium oxide, tungsten-gold-vanadium oxide, tungsten-vanadium-tin-antimony oxide, and cesium-tungsten bronze, or a combination of at least two thereof.

[0029] Preferably, the ultraviolet absorber is selected from any one of benzotriazole ultraviolet absorbers, triazine ultraviolet absorbers or phenylbenzimidazole ultraviolet absorbers, or a combination of at least two thereof.

[0030] Preferably, the benzotriazole ultraviolet absorber is selected from any one of UV326, UV327, UV329 or UVP, or a combination of at least two thereof.

[0031] Preferably, the triazine ultraviolet absorber is selected from any one of Tinuvin 400, Tinuvin 405 or UV-1577, or a combination of at least two thereof.

[0032] Preferably, the phenylbenzimidazole ultraviolet absorber is selected from any one of Tinuvin 328, Tinuvin 360 or UV-1226, or a combination of at least two thereof.

[0033] Preferably, the thickness of the anti-light aging layer is 5-30 μm.

[0034] Preferably, the substrate layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is greater than 85%.

[0035] Preferably, the optically highly transparent material is selected from any one of PC, PET, PEN, PETG, COP or PMMA, or a combination of at least two thereof.

[0036] Preferably, the thickness of the substrate layer is 75-200 μm.

[0037] Preferably, the raw materials for preparing the first OCA layer and the second OCA layer include, by weight: 100 parts of high-transmittance acrylic resin, 0.5-2 parts of epoxy resin, 0.5-2 parts of water-blocking material and 0.1-1 part of antioxidant.

[0038] Preferably, the light transmittance of the high-transmittance acrylic resin is 85-93%.

[0039] Preferably, the high-transmittance acrylic resin includes SAPSA8087 from Ningbo Lihebohui, UVR2002 from Shanghai Feikai Materials, special glue for polarizers from Shenzhen Jialin Special Materials, etc.

[0040] Preferably, the epoxy resin includes Jiangsu Sanmu 604, Nanya Kunshan's NPEL-128, NPES-901, Yangnong Jinhu's YN1827, etc.

[0041] Preferably, the water-blocking material is selected from nano inorganic particles.

[0042] Preferably, the nano inorganic particles include any one of nano zinc oxide, nano silicon dioxide, nano zirconium oxide or cellulose nanocrystals, or a combination of at least two thereof.

[0043] Preferably, the antioxidant is selected from any one of methyl silicone, hexaethylphosphoramidite or dialkyl phosphite or a combination of at least two thereof.

[0044] Preferably, the thickness ratio of the first OCA layer to the second OCA layer is 1:(1-1.25).

[0045] Preferably, the thickness of the first OCA layer is 10-100 μm, and the thickness of the second OCA layer is 10-125 μm.

[0046] Preferably, the polarizer includes a polarizer grating layer and protective film layers located on the upper and lower surfaces of the polarizer grating layer.

[0047] Preferably, the polarizer grating layer comprises polyvinyl alcohol and a high-temperature resistant dichroic pigment in a mass ratio of 100:(1-10); and the protective film layer comprises cellulose triacetate.

[0048] Preferably, the protective film layer comprises cellulose triacetate.

[0049] Preferably, the high temperature resistant dichroic pigment includes any one or a combination of at least two of a disazo dichroic dye, anthraquinone dichroic dye, triphenoxadiazine and derivative dichroic dye, monomethine dichroic dye or polymethine dichroic dye.

[0050] Preferably, the thickness of the polarizer is 100-200 μm.

[0051] Preferably, the thickness of the polarizer grating layer is 20-100 μm, and the thickness of the protective film layers on the upper and lower surfaces of the polarizer grating layer are independently 20-50 μm.

[0052] Preferably, the thermal expansion balancing layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is greater than 85%.

[0053] Preferably, the optically highly transparent material is selected from any one of PC, PET, PEN, PETG, COP or PMMA, or a combination of at least two thereof.

[0054] In a second aspect, the present invention provides a method for preparing the anti-aging polarized shading device as described in the first aspect, the preparation method comprising the following steps: Mixing the components in the raw materials for preparing the anti-light aging layer to obtain slurry 1; mixing the components in the anti-fouling hardening layer to obtain slurry 2; firstly applying the slurry 1 to the surface of the substrate layer, and thermally curing to form the anti-light aging layer, and then applying the slurry 2 to the surface of the anti-light aging layer, and photocuring to form the anti-fouling hardening layer to obtain a composite part 1; Mixing the components in the raw materials for preparing the first OCA layer to obtain a first adhesive; mixing the components in the raw materials for preparing the second OCA layer to obtain a second adhesive; applying the first adhesive and the second adhesive to the upper and lower surfaces of the polarizer, respectively, to obtain a second composite; The uncoated side of the composite component 1 is bonded to the side of the polarizer coated with adhesive 1, and the thermal expansion balancing layer is bonded to the side of the polarizer coated with adhesive 2, and after curing and drying, the anti-aging polarized shading device is obtained.

[0055] In a third aspect, the present invention provides a use of the anti-aging polarized shading device as described in the first aspect in the preparation of a head-up display panel.

[0056] In a fourth aspect, the present invention provides a head-up display panel, comprising the anti-aging polarization shading device as described in the first aspect.

[0057] Compared with the prior art, the present invention has the following beneficial effects: (1) The antifouling hardened layer of the present invention comprises a composite acrylic resin of a specific composition and ratio and adds a fluorine-containing polymer as an antifouling and anti-fingerprint additive. By combining a plurality of acrylic esters with each other, the compatibility is good, and a hardened coating with excellent formability can be formed. The scratch resistance, wear resistance, chemical resistance, weather resistance and antifouling properties are significantly improved.

[0058] (2) The anti-light aging layer of the present invention has a high ability to block the penetration of infrared and ultraviolet rays in sunlight, so that it has a good absorption and blocking effect on near-infrared rays with a wider wavelength, and further improves the heat insulation performance, anti-ultraviolet performance, anti-yellowing performance, weather resistance and light transmittance of the absorption coating, prevents organic matter from aging, and requires a long service life for automobile parts exposed to direct sunlight.

[0059] (3) The optical film substrate of the present invention can improve the overall flame retardant effect of the anti-aging polarized shading device, while preventing water vapor from penetrating and damaging the material of the polarizer.

[0060] (4) In the present invention, the first OCA layer connects the substrate layer and the polarizer, and the second OCA layer connects the polarizer and the thermal expansion balance layer, providing excellent flexibility, and the OCA can also block the corrosion of water vapor to the polarizer.

[0061] (5) The polarizer of the present invention is a dichroic pigment polarizer that can withstand sunlight exposure and high temperature. The pigment has excellent mixing uniformity and can provide a non-uniform grating polarizer, which can improve its color reproduction when there is a polarization angle error.

[0062] (6) The thermal expansion balancing layer of the present invention has a curved structure to ensure good adhesion to the curved surface when used in a head-up display. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0064] Figure 1 It is a schematic structural diagram of the anti-aging polarization shading device of the present invention.

[0065] Among them, 1 is an anti-fouling hardening layer, 2 is an anti-light aging layer, 3 is a substrate layer, 4 is a first OCA layer, 5 is a polarizer, 6 is a second OCA layer, and 7 is a thermal expansion balance layer.

[0066] Figure 2 It is a schematic structural diagram of the polarizer of the present invention.

[0067] Among them, 50 is a polarizer grating layer, and 51 is a protective film layer. DETAILED DESCRIPTION

[0068] Unless otherwise defined herein, scientific and technological terms used in conjunction with the present invention shall have the meanings commonly understood by those of ordinary skill in the art. The meaning and scope of the terms should be clear, however, in the case of any potential ambiguity, the definitions provided herein take precedence over any dictionary or external definitions. In this application, unless otherwise stated, the use of "or" means "and / or". In addition, the use of the term "including" and other forms is non-limiting.

[0069] It should be noted that specific details are described in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0070] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] In a first aspect, the present invention provides an anti-aging polarized shading device, such as Figure 1 As shown, the anti-aging polarized shading device includes an anti-fouling hardening layer 1, an anti-light aging layer 2, a substrate layer 3, a first OCA layer 4, a polarizer 5, a second OCA layer 6 and a thermal expansion balance layer 7 which are stacked in sequence.

[0072] In the present invention, the hardening layer of the anti-aging polarized shading device has excellent ability to prevent external physical damage and chemical solvent damage; the anti-light aging layer has excellent ability to prevent organic aging, and the automobile parts exposed to direct sunlight require a long service life, prevent ultraviolet rays from damaging the polymer materials in each layer, reduce the yellowing, fogging, and powdering of the polymer materials under ultraviolet rays, and prevent ultraviolet rays from affecting the hardening effect of the two layers of OCA, resulting in decreased adhesion and film peeling during use; the optical film substrate can effectively improve the overall flame retardant effect, while preventing water vapor from penetrating and damaging the polarizer material; the first OCA layer connects the substrate layer and the polarizer, the second OCA layer connects the polarizer and the thermal expansion balance layer, and provides a certain degree of flexibility, and the OCA can also block the erosion of the polarizer by water vapor; the polarizer can provide a non-uniform grating polarizer, which can improve its color restoration when there is a polarization angle error; the thermal expansion balance layer can ensure good curved surface bonding.

[0073] As an optional embodiment, the antifouling hardening layer includes a composite acrylic resin and an antifouling additive in a mass ratio of 100:(0.1-10).

[0074] As an optional embodiment, the mass ratio of the composite acrylic resin to the antifouling additive is 100:(0.1~10), for example, it can be 100:0.1, 100:0.5, 100:1, 100:2, 100:3, 100:4, 100:5, 100:6, 100:7, 100:8, 100:9, 100:10, etc.

[0075] As an optional embodiment, the raw materials for preparing the composite acrylic resin include, by weight: 5-15 parts of pentaerythritol triacrylate, 15-25 parts of isobornyl acrylate, 25-35 parts of polyurethane acrylate, 1-10 parts of tetraethylene glycol diacrylate, 10-20 parts of tetrahydrofurfuryl acrylate, N,N -10~20 parts of dimethyl acrylamide and 0.5~3 parts of light curing agent.

[0076] In the present invention, PETA (pentaerythritol triacrylate): highest hardness, high crosslinking density; IBOA (isobornyl acrylate): relatively high hardness, rigid ring structure; PUA (polyurethane acrylate): medium to high hardness; TTEGDA (tetraethylene glycol diacrylate): medium hardness, difunctionality; THFA (tetrahydrofurfuryl acrylate): relatively low hardness, monofunctionality; N,N-dimethylacrylamide): lowest hardness, monofunctionality. The antifouling hardening layer of the present invention comprises a multifunctional acrylic resin of a specific composition and ratio, which can form a hardened coating with excellent formability, well balances the hardness and flexibility of the hardened layer, and significantly improves its scratch resistance, wear resistance, chemical resistance, weather resistance and antifouling properties.

[0077] More specifically, the antifouling hardening performance is significantly improved because of the following reasons: 1. The crosslinking density is significantly increased: Each molecule of the multifunctional acrylic resin contains multiple reactive functional groups. During the photocuring process, these functional groups can undergo free radical polymerization or addition reaction with adjacent molecules to form more crosslinking points. When different functional resins are used in combination, the high-functionality component dominates the formation of a dense three-dimensional network, thereby improving the hardness and mechanical strength of the material. 2. Optimization of the three-dimensional network structure: Low-functionality resins may provide a certain segment flexibility, while high-functionality resins enhance the crosslinking density. A variety of combinations can achieve a balance between hardness and toughness, taking into account both hardness and flexibility, and are suitable for flexible electronic coatings. The synergistic effect between the components can improve the overall density. 3. Reaction kinetics advantage: Further improve the reaction activity, quickly form an initial crosslinking network in the curing system, shorten the curing time, and this rapid networking effect can also reduce the residual unreacted monomers and improve the conversion rate.

[0078] As an optional embodiment, the content of pentaerythritol triacrylate in the raw material for preparing the composite acrylic resin is 5 to 15 parts, for example, it can be 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, etc.

[0079] As an optional embodiment, the content of isobornyl acrylate in the raw material for preparing the composite acrylic resin is 15 to 25 parts, for example, it can be 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, 25 parts, etc.

[0080] As an optional embodiment, the content of polyurethane acrylate in the raw material for preparing the composite acrylic resin is 25 to 35 parts, for example, it can be 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, etc.

[0081] As an optional embodiment, the content of tetraethylene glycol diacrylate in the raw material for preparing the composite acrylic resin is 1 to 10 parts, for example, it can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0082] As an optional embodiment, the content of tetrahydrofurfuryl acrylate in the raw material for preparing the composite acrylic resin is 10-20 parts, for example, it can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0083] As an optional embodiment, the raw materials for preparing the composite acrylic resin are N,N - The content of dimethylacrylamide is 10 to 20 parts, for example, it can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0084] As an optional embodiment, the raw materials for preparing the composite acrylic resin contain 0.5 to 3 parts of photocuring agent, for example, 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.8 parts, 3 parts, etc.

[0085] As an optional embodiment, the antifouling additive comprises a fluoropolymer.

[0086] In the present invention, fluorine-containing polymers are added as anti-fouling and anti-fingerprint additives to make the surface resistant to contamination by solvents such as acetone, alcohol, detergent, sweat, coffee and beverages.

[0087] As a preferred embodiment, the antifouling additive is selected from any one or a combination of at least two of perfluoropolyether, polyfluorosilicone, bis(trimethoxysilylpropylcarbamate)perfluoropolyether, perfluorodecyltriethoxysilane, perfluorodecyltriethoxysilane or perfluorooctyltrimethoxysilane.

[0088] As an optional embodiment, the photocuring agent is selected from any one of benzophenone, 2-isopropylthioxanthone, dimethylbenzil ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, 2-hydroxy-2-methyl-1-phenyl-1-propanone or 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone, or a combination of at least two thereof.

[0089] As an optional implementation, the composite acrylic resin further includes: 0.5 to 3 parts of an antioxidant.

[0090] As an optional embodiment, the raw material for preparing the composite acrylic resin contains 0.5 to 3 parts of antioxidant, for example, 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, 2.2 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.8 parts, 3 parts, etc.

[0091] As an optional embodiment, the antioxidant is selected from four [ β Any one of pentaerythritol-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate, dilauryl thiodipropionate, dioctadecyl pentaerythritol diphosphite, tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylene diphosphate or dilauryl thiodipropionate or a combination of at least two thereof.

[0092] As an optional embodiment, the thickness of the antifouling hardening layer is 1 to 15 μm, for example, it can be 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, etc.

[0093] As an optional embodiment, the raw materials for preparing the anti-light aging layer include, by weight: 10 to 20 parts of polyhydroxy acrylic resin, 1 to 10 parts of isocyanate curing agent, 0 to 20 parts of infrared absorber, 1 to 10 parts of ultraviolet absorber, 0.1 to 5 parts of surfactant, and 60 to 80 parts of composite solvent.

[0094] As an optional embodiment, the content of polyhydroxy acrylic resin in the preparation raw materials of the anti-light aging layer is 10 to 20 parts, for example, it can be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0095] As an optional embodiment, the content of isocyanate curing agent in the raw materials for preparing the anti-light aging layer is 1 to 10 parts, for example, it can be 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0096] In the present invention, a highly transparent polyhydroxy acrylic resin-isocyanate curing resin system is selected in the anti-light aging layer, which has good wettability to the substrate, and the polar groups generated by the isocyanate reaction further strengthen the interface bonding, and improve the interlayer bonding force between the anti-light aging layer and the anti-fouling hardening layer and the substrate layer. At the same time, the ultraviolet resistance of the polyhydroxy acrylic resin-is combined with the anti-yellowing characteristics of isocyanate, which can significantly improve the anti-light aging ability of the anti-light aging layer. In addition, after the polyhydroxy acrylic resin and isocyanate are cured, a dense three-dimensional cross-linked network is formed, which can physically wrap the inorganic powder particles to prevent them from migrating or settling. This coating effect further compacts the interface between the inorganic absorbent and the resin during the curing process. And the flexibility of the hybrid network system can alleviate the interfacial stress caused by the difference in thermal expansion coefficients between the inorganic absorbent and the resin, and reduce the generation of microcracks.

[0097] As an optional embodiment, the content of infrared absorber in the preparation raw materials of the anti-light aging layer is 0~20 parts, for example, it can be 0 parts, 0.5 parts, 1 parts, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, etc.

[0098] As an optional embodiment, the raw materials for preparing the anti-light aging layer contain 1 to 10 parts of ultraviolet absorber, for example, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts, etc.

[0099] As an optional embodiment, the raw materials for preparing the anti-light aging layer contain 0.1 to 5 parts of surfactant, for example, 0.5 parts, 1 parts, 1.5 parts, 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, 4.5 parts, 5 parts, etc.

[0100] As an optional embodiment, the composite solvent is 60 to 80 parts in the preparation raw materials of the anti-light aging layer, for example, it can be 60 parts, 62 parts, 64 parts, 65 parts, 66 parts, 68 parts, 70 parts, 72 parts, 74 parts, 75 parts, 78 parts, 80 parts, etc.

[0101] As an optional embodiment, the composite solvent includes a large molecular weight solvent and a small molecular weight solvent in a mass ratio of (8.5~9.8):(0.2~1.5), for example, it can be 8.5:1.5, 8.6:1.4, 8.8:1.2, 9:1, 9.2:1.8, 9.4:1.6, 9.5:0.5, 9.6:0.4, 9.8:0.2, etc.

[0102] As an optional embodiment, the high molecular weight solvent includes N- any one of methyl-2-pyrrolidone, cyclohexanone or xylene, or a combination of at least two thereof.

[0103] As an optional embodiment, the small molecular weight solvent includes any one of isopropanol, butanone or ethyl acetate, or a combination of at least two of them.

[0104] In the present invention, the specific high molecular weight solvent and low molecular weight solvent are preferably compounded in the above mass ratio, that is, a small amount of low molecular weight solvent is added to the high molecular weight solvent, so as to ensure that the high molecular weight solvent can better cover the low molecular weight solvent to form a structure more similar to a colloid, and more effectively weaken the erosion of small molecules on large molecules, thereby solving the problems of large haze and easy whitening of the part of the coating corroded by the solvent on the substrate, the substrate is not UV-resistant and easy to turn yellow and powder, and the coating has high viscosity and is prone to sagging, peeling, vertical lines, etc.

[0105] As an optional embodiment, the surfactant is selected from any one or a combination of at least two of alkyl sulfate esters of C12 or above, straight-chain alcohol polyoxyethylene ether sulfates, sulfated triglycerides, polyoxyethylene alkylphenols, straight-chain alcohol polyoxyethylene ethers, polyether-modified polydimethylsiloxanes or polyureas.

[0106] As an optional embodiment, the hydroxyl value of the polyhydroxy acrylic resin is 10~150 mgKOH / g, for example, it can be 10 mgKOH / g, 20 mgKOH / g, 30 mgKOH / g, 40 mgKOH / g, 50 mgKOH / g, 60 mgKOH / g, 70 mgKOH / g, 80 mgKOH / g, 90 mgKOH / g, 100 mgKOH / g, 110 mgKOH / g, 120 mgKOH / g, 130 mgKOH / g, 140 mgKOH / g, 150 mgKOH / g, etc.

[0107] As an optional embodiment, the polyhydroxy acrylic resin is selected from any one of HU840K of Laiyang Hongan, HA865 of Kunshan Custer, LR7601 of Mitsubishi or DS-2055 of Nantong Baisen Chemical, or a combination of at least two thereof.

[0108] As an optional embodiment, the isocyanate curing agent is selected from hexamethylene diisocyanate and / or isophorone diisocyanate.

[0109] As an optional embodiment, the isocyanate curing agent is selected from any one of BASF HDI type N3300, BASF IPDI type XP 2400, Wanhua HDI 200, Wanhua IPDI 200, Covestro HDI type L75 or Covestro IPDI type I100, or a combination of at least two thereof.

[0110] As an optional embodiment, the infrared absorber includes an organic dye and a metal oxide in a mass ratio of (0.05-2):(8-10); Here, “0.05~2” can be, for example, 0.05, 0.08, 0.1, 0.2, 0.4, 0.5, 0.6, 0.8, 1, 1.2, 1.4, 1.5, 1.6, 1.8, 2, etc.; Among them, "8~10" can be, for example, 8, 8.2, 8.4, 8.5, 8.6, 8.8, 9, 9.2, 9.4, 9.6, 9.8, 10, etc.

[0111] In the present invention, it is preferred to use a specific ratio of organic dyes and metal oxides in combination. The combination of the two can cover a wider infrared spectrum and is suitable for multi-band infrared absorption needs. The combination of the two can further improve thermal stability and light stability. Metal oxides can be used as carriers to reduce the direct exposure of dye molecules to the environment and extend the life of the material.

[0112] As an optional implementation, the organic dye is selected from indole near-infrared fluorescent organic dyes, and the metal oxide is selected from nano rare earth metal oxide powders.

[0113] Preferably, the organic dye is selected from any one of IR780, IR820, IR956, IR1008 or IR1086, or a combination of at least two thereof.

[0114] As an optional embodiment, the particle size of the nano rare earth metal oxide powder is 20-50 nm, for example, it can be 20 nm, 25 nm, 30 nm, 35 nm, 40 nm, 45 nm, 50 nm, etc.

[0115] As an optional embodiment, the specific surface area of ​​the nano rare earth metal oxide powder is 30 to 60 m 2 / g, for example, it can be 30 m 2 / g, 35 m 2 / g, 40 m 2 / g, 45 m 2 / g, 50 m 2 / g, 55 m 2 / g, 60 m 2 / g, etc.

[0116] As an optional embodiment, the metal oxide is selected from any one of tungsten oxide, tungsten-cesium oxide, tungsten-gold-vanadium oxide, tungsten-vanadium-tin-antimony oxide, and cesium-tungsten bronze, or a combination of at least two thereof.

[0117] As an optional embodiment, the ultraviolet absorber is selected from any one of benzotriazole ultraviolet absorbers, triazine ultraviolet absorbers or phenylbenzimidazole ultraviolet absorbers, or a combination of at least two thereof.

[0118] As an optional embodiment, the benzotriazole ultraviolet absorber is selected from any one of UV326, UV327, UV329 or UVP, or a combination of at least two thereof.

[0119] As an optional embodiment, the triazine ultraviolet absorber is selected from any one of Tinuvin 400, Tinuvin 405 or UV-1577, or a combination of at least two thereof.

[0120] As an optional embodiment, the phenylbenzimidazole ultraviolet absorber is selected from any one of Tinuvin 328, Tinuvin 360 or UV-1226, or a combination of at least two thereof.

[0121] As an optional embodiment, the thickness of the anti-light aging layer is 5~30 μm, for example, it can be 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm, 11 μm, 12 μm, 13 μm, 14 μm, 15 μm, 16 μm, 17 μm, 18 μm, 19 μm, 20 μm, 22 μm, 24 μm, 25 μm, 26 μm, 28 μm, 30 μm, etc.

[0122] As an optional embodiment, the substrate layer includes an optically highly transmittance material, and the transmittance of the optically highly transmittance material is >85%, for example, it can be 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0123] As an optional embodiment, the optically highly transparent material is selected from any one of PC, PET, PEN, PETG, COP or PMMA, or a combination of at least two thereof.

[0124] As a preferred embodiment, the optically highly transparent material is PC. Considering the flame retardancy and optical effects of the vehicle, PC is preferably used.

[0125] As an optional embodiment, the thickness of the substrate layer is 75 to 200 μm, for example, it can be 75 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 171 μm, 172 μm, 173 μm, 174 μm, 175 μm, 176 μm, 177 μm, 178 μm, 179 μm, 180 μm, 190 μm, 200 μm, etc.

[0126] As an optional implementation, the raw materials for preparing the first OCA layer include, by weight: 100 parts of high-transmittance acrylic resin, 0.5-2 parts of epoxy resin, 0.5-2 parts of water-blocking material and 0.1-1 part of antioxidant.

[0127] As an optional embodiment, the content of epoxy resin in the raw materials for preparing the first OCA layer is 0.5~2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0128] As an optional embodiment, the content of water-blocking material in the raw materials for preparing the first OCA layer is 0.5~2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0129] As an optional embodiment, the content of antioxidant in the raw materials for preparing the first OCA layer is 0.1~1 part, for example, it can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0130] As a preferred embodiment, the raw materials for preparing the second OCA layer include, by weight: 100 parts of high-transmittance acrylic resin, 0.5-2 parts of epoxy resin, 0.5-2 parts of water-blocking material and 0.1-1 part of antioxidant.

[0131] As an optional embodiment, the content of epoxy resin in the raw materials for preparing the second OCA layer is 0.5 to 2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0132] As an optional embodiment, the content of water-blocking material in the raw materials for preparing the second OCA layer is 0.5 to 2 parts, for example, it can be 0.5 parts, 0.6 parts, 0.8 parts, 1 parts, 1.2 parts, 1.4 parts, 1.5 parts, 1.6 parts, 1.8 parts, 2 parts, etc.

[0133] As an optional embodiment, the content of antioxidant in the raw materials for preparing the second OCA layer is 0.1 to 1 part, for example, it can be 0.1 part, 0.2 part, 0.3 part, 0.4 part, 0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, etc.

[0134] In the present invention, the OCA layer is mainly composed of high-transmittance acrylic resin to provide a certain degree of flexibility. At the same time, a certain amount of epoxy resin is added to strengthen the bonding strength. In order to improve its aging resistance, a certain amount of water-blocking material is also added to block the erosion of water vapor on the polarizer.

[0135] As an optional embodiment, the light transmittance of the high-transmittance acrylic resin is 85-93%, for example, it can be 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, etc.

[0136] As an optional implementation, the high-transmittance acrylic resin includes SAPSA8087 from Ningbo Lihebohui, UVR2002 from Shanghai Feikai Materials, special glue for polarizers from Shenzhen Jialin Special Materials, etc.

[0137] As an optional embodiment, the epoxy resin includes Jiangsu Sanmu 604, Nanya Kunshan's NPEL-128, NPES-901, Yangnong Jinhu's YN1827, etc. As an optional embodiment, in the raw materials for preparing the first OCA layer and / or the second OCA layer, the water-blocking material is selected from nano inorganic particles.

[0138] As an optional embodiment, the nano inorganic particles include any one of nano zinc oxide, nano silicon dioxide, nano zirconium oxide or cellulose nanocrystals, or a combination of at least two thereof.

[0139] As an optional embodiment, in the raw materials for preparing the first OCA layer and / or the second OCA layer, the antioxidant is selected from any one of methyl silicone, hexaethyl phosphorotriamide or dialkyl phosphite, or a combination of at least two thereof.

[0140] As a preferred embodiment, the thickness ratio of the first OCA layer to the second OCA layer is 1:(1-1.25), for example, it can be 1:1, 1:1.05, 1:1.1, 1:1.15, 1:1.2, 1:1.25, etc.

[0141] As an optional implementation, the thickness of the first OCA layer is 10-100 μm, for example, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc.

[0142] As an optional implementation, the thickness of the second OCA layer is 10-125 μm, for example, 10 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 125 μm, etc.

[0143] As an optional implementation, Figure 2 As shown, the polarizer includes a polarizer grating layer 50 and a protective film layer 51 located on the upper and lower surfaces of the polarizer grating layer.

[0144] As an optional embodiment, the polarizer grating layer includes polyvinyl alcohol and high temperature resistant dichroic pigment in a mass ratio of 100:(1~10), for example, it can be 100:1, 100:2, 100:3, 100:4, 100:5, 100:6, 100:7, 100:8, 100:9, 100:10, etc.

[0145] As an optional embodiment, the degree of polymerization of the polyvinyl alcohol is between 1000 and 9000, for example, it can be 1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000, etc.

[0146] As an optional embodiment, the saponification degree of the polyvinyl alcohol is ≥98% and <100%, for example, it can be 98%, 98.2%, 98.4%, 98.5%, 98.6%, 98.8%, 99%, 99.2%, 99.4%, 99.5%, 99.6%, 99.8%, 99.9%, etc.

[0147] As an optional embodiment, the molecular weight distribution of the polyvinyl alcohol is 1.5~2.5, for example, it can be 1.5, 1.6, 1.7, 1.8, 1.9, 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, etc.

[0148] As an optional embodiment, the polyvinyl alcohol can be purchased from manufacturers such as Anhui Wanwei High-Tech, Kuraray, and Japan Chemical Synthesis.

[0149] As an optional embodiment, the protective film layer includes cellulose triacetate.

[0150] As an optional embodiment, the high temperature resistant dichroic pigment includes any one or a combination of at least two of a disazo dichroic dye, anthraquinone dichroic dye, triphenoxadiazine and derivative dichroic dye, monomethine dichroic dye or polymethine dichroic dye.

[0151] As an optional embodiment, the high temperature resistant dichroic pigment includes but is not limited to red, blue, green, yellow, orange, purple, etc.; suppliers include but are not limited to Huacai Dye Business Department, Yuncheng District, Yunfu City, Guangdong Province, Nanjing Jianolin, Nippon Catalyst, Japan Sumitomo, etc.

[0152] As an optional embodiment, the thickness of the polarizer is 100~200 μm, for example, it can be 100 μm, 110 μm, 120 μm, 121 μm, 122 μm, 123 μm, 124 μm, 125 μm, 126 μm, 127 μm, 128 μm, 129 μm, 130 μm, 140 μm, 150 μm, 160 μm, 170 μm, 180 μm, 190 μm, 200 μm, etc.

[0153] As an optional embodiment, the thickness of the polarizer grating layer is 20~100 μm, for example, it can be 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, etc., and the thickness of the protective film layers on the upper and lower surfaces of the polarizer grating layer are each independently 20~50 μm, for example, it can be 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, etc.

[0154] As an optional embodiment, the thermal expansion balancing layer includes an optically highly transmittance material, and the transmittance of the optically highly transmittance material is greater than 85%, for example, it may be 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, etc.

[0155] As an optional embodiment, the optically highly transparent material is selected from any one of PC, PET, PEN, PETG, COP or PMMA, or a combination of at least two thereof.

[0156] It should be noted that due to the thermal expansion rate of the polarizer is about 0.007%, the thermal expansion rate of PC is about 0.006%; the thermal expansion rate of PET is about 0.004%; the thickness of the polarizer available on the market is generally about 200 μm, which is too soft, and the transparent panel of the head-up display is suspended and has a certain curvature. The panel needs to have a certain stiffness, and the selected thickness is between 375~500 μm; the polarizer needs to be thickened, and the thickening material is a variety of high-transmittance film materials; however, the single-sided thickened material will curl and deform when heated, and the single-sided material will bulge or distort when installed on the head-up display under the influence of sunlight and high temperature in the car. To avoid this situation, it is necessary to set a thermal expansion balance layer on the back on the basis of single-sided thickening. The material has the same thermal expansion rate as the first layer of thickened material.

[0157] In a second aspect, the present invention provides a method for preparing the anti-aging polarized shading device as described in the first aspect, the preparation method comprising the following steps: Mixing the components in the raw materials for preparing the anti-light aging layer to obtain slurry 1; mixing the components in the anti-fouling hardening layer to obtain slurry 2; firstly applying the slurry 1 to the surface of the substrate layer, and thermally curing to form the anti-light aging layer, and then applying the slurry 2 to the surface of the anti-light aging layer, and photocuring to form the anti-fouling hardening layer to obtain a composite part 1; Mixing the components in the raw materials for preparing the first OCA layer to obtain a first adhesive; mixing the components in the raw materials for preparing the second OCA layer to obtain a second adhesive; applying the first adhesive and the second adhesive to the upper and lower surfaces of the polarizer, respectively, to obtain a second composite; The uncoated side of the composite component 1 is bonded to the side of the polarizer coated with adhesive 1, and the thermal expansion balancing layer is bonded to the side of the polarizer coated with adhesive 2, and after curing and drying, the anti-aging polarized shading device is obtained.

[0158] As an optional embodiment, the preparation method of the slurry one includes: mixing the infrared absorber, ultraviolet absorber, surfactant and composite solvent, stirring for the first time to obtain dispersion one; mixing the dispersion one and polyhydroxy acrylic resin, stirring for the second time, filtering, and obtaining dispersion two; mixing the dispersion two and isocyanate curing agent, stirring for the third time to obtain the slurry one.

[0159] As an optional embodiment, in the process of preparing the slurry one, the rotation speed of the first stirring is 3000~10000 rpm, for example, it can be 3000 rpm, 4000 rpm, 5000 rpm, 6000 rpm, 7000 rpm, 8000 rpm, 9000 rpm, 10000 rpm, etc., and the time of the first stirring is 30~60 min, for example, it can be 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0160] As an optional embodiment, during the preparation of the slurry one, the rotation speed of the second stirring is 3000~10000 rpm, for example, it can be 3000 rpm, 4000 rpm, 5000 rpm, 6000 rpm, 7000 rpm, 8000 rpm, 9000 rpm, 10000 rpm, etc., and the time of the second stirring is 30~60 min, for example, it can be 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0161] As an optional embodiment, during the preparation of the slurry one, the rotation speed of the third stirring is 300~1000 rpm, for example, it can be 300 rpm, 400 rpm, 500 rpm, 600 rpm, 700 rpm, 800 rpm, 9000 rpm, 1000 rpm, etc., and the time of the third stirring is 20~40 min, for example, it can be 20 min, 25 min, 30 min, 35min, 40 min, etc.

[0162] As an optional embodiment, the preparation method of the slurry 2 comprises: pentaerythritol triacrylate, isobornyl acrylate, polyurethane acrylate, tetraethylene glycol diacrylate, tetrahydrofurfuryl acrylate, N,N -dimethylacrylamide, and stirred for the first time to obtain dispersion A; then add a light curing agent, an antifouling additive and an antioxidant, and stir for the second time to obtain the slurry II.

[0163] As an optional implementation, during the preparation of the slurry 2, the rotation speed of the first stirring is 300-1000 rpm, and the time of the first stirring is 30-60 min.

[0164] As an optional implementation, during the preparation of the second slurry, the rotation speed of the second stirring is 300-1000 rpm, and the time of the second stirring is 30-60 min.

[0165] As an optional embodiment, in the process of preparing the anti-light aging layer, the temperature of the thermal curing is 115-125°C, for example, it can be 115°C, 116°C, 117°C, 118°C, 119°C, 120°C, 121°C, 122°C, 123°C, 124°C, 125°C, etc., and the time of the thermal curing is 5-20 min, for example, it can be 5 min, 6 min, 7 min, 8 min, 9 min, 10 min, 11 min, 12 min, 13 min, 14 min, 15 min, 16 min, 17 min, 18 min, 19 min, 20 min, etc.

[0166] As an optional embodiment, during the preparation of the antifouling hardening layer, the UV energy of the photocuring is 300-500 mj / cm 2 , for example, it can be 300 mj / cm 2 、350 mj / cm 2 , 400 mj / cm 2 , 450 mj / cm 2 , 500 mj / cm 2 The light curing time is 20 to 50 s, for example, 20 s, 25 s, 30 s, 35 s, 40 s, 45 s, 50 s, etc.

[0167] As an optional implementation, the preparation method of the adhesive material 1 includes: mixing a high-transmittance acrylic resin, an epoxy resin, a water-blocking material and an antioxidant, and stirring the mixture to obtain the adhesive material 1.

[0168] As an optional implementation, in the process of preparing the rubber material 1, the stirring speed is 300-1000 rpm, and the stirring time is 30-60 min.

[0169] As an optional implementation, the preparation method of the second adhesive comprises: mixing a high-transmittance acrylic resin, an epoxy resin, a water-blocking material and an antioxidant, and stirring the mixture to obtain the second adhesive.

[0170] As an optional implementation, in the process of preparing the second rubber material, the stirring speed is 300-1000 rpm, and the stirring time is 30-60 min.

[0171] As an optional embodiment, after lamination, the curing and drying temperature is 60-80°C, for example, 60°C, 65°C, 70°C, 75°C, 80°C, etc.

[0172] As an optional embodiment, the preparation method of the polarizer grating layer includes: first adding 80% of the pigment to the polyvinyl alcohol, stirring it for the first time, and then ultrasonically treating it; then adding the remaining 80% of the pigment, stirring it for the second time, and then casting it into a film and stretching it to obtain the polarizer grating layer.

[0173] As an optional embodiment, in the process of preparing the polarizer grating layer, the rotation speed of the first stirring is 500~1500 rpm, for example, it can be 500 rpm, 600 rpm, 700 rpm, 800 rpm, 900 rpm, 1000 rpm, 1100 rpm, 1200 rpm, 1300 rpm, 1400 rpm, 1500 rpm, etc.; the time of the first stirring is 10~60min, for example, it can be 10 min, 15 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0174] As an optional embodiment, in the process of preparing the polarizer grating layer, the power of the ultrasonic treatment is 10~30 kHZ, for example, it can be 10 kHZ, 12 kHZ, 14 kHZ, 15 kHZ, 16 kHZ, 18 kHZ, 20 kHZ, 22kHZ, 24 kHZ, 25 kHZ, 26 kHZ, 28 kHZ, 30 kHZ, etc.; the time of the first stirring is 10~60 min, for example, it can be 10 min, 15 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0175] As an optional embodiment, in the process of preparing the polarizer grating layer, the rotation speed of the second stirring is 200~800 rpm, for example, it can be 200 rpm, 250 rpm, 300 rpm, 350 rpm, 400 rpm, 450 rpm, 500rpm, 550 rpm, 600 rpm, 650 rpm, 700 rpm, 750 rpm, 800 rpm, etc.; the time of the first stirring is 10~60 min, for example, it can be 10 min, 15 min, 20 min, 25 min, 30 min, 35 min, 40 min, 45 min, 50 min, 55 min, 60 min, etc.

[0176] In a third aspect, the present invention provides a use of the anti-aging polarized shading device as described in the first aspect in the preparation of a head-up display panel.

[0177] In a fourth aspect, the present invention provides a head-up display panel, comprising the anti-aging polarization shading device as described in the first aspect.

[0178] The present invention is further described below by way of examples. Unless otherwise specified, the materials in the examples are prepared according to existing methods or directly purchased from the market.

[0179] Example 1 This embodiment provides an anti-aging polarized shading device, which includes an anti-fouling hardening layer, an anti-light aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer and a thermal expansion balance layer stacked in sequence. The material ratio and thickness of each layer are shown in Table 1 below: Table 1

[0180] The preparation method comprises the following steps: Mixing the components in the raw materials for preparing the anti-light aging layer to obtain slurry 1; mixing the components in the anti-fouling hardening layer to obtain slurry 2; firstly applying the slurry 1 to the surface of the substrate layer, and thermally curing to form the anti-light aging layer, and then applying the slurry 2 to the surface of the anti-light aging layer, and photocuring to form the anti-fouling hardening layer to obtain a composite part 1; Mixing the components in the raw materials for preparing the first OCA layer to obtain a first adhesive; mixing the components in the raw materials for preparing the second OCA layer to obtain a second adhesive; applying the first adhesive and the second adhesive to the upper and lower surfaces of the polarizer, respectively, to obtain a second composite; The uncoated side of the composite component 1 is bonded to the side of the polarizer coated with adhesive 1, and the thermal expansion balancing layer is bonded to the side of the polarizer coated with adhesive 2, and after curing and drying, the anti-aging polarized shading device is obtained.

[0181] Example 2 This embodiment provides an anti-aging polarized shading device, which includes an anti-fouling hardening layer, an anti-light aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer and a thermal expansion balance layer stacked in sequence. The material ratio and thickness of each layer are shown in Table 2 below: Table 2

[0182] The preparation method comprises the following steps: Mixing the components in the raw materials for preparing the anti-light aging layer to obtain slurry 1; mixing the components in the anti-fouling hardening layer to obtain slurry 2; firstly applying the slurry 1 to the surface of the substrate layer, and thermally curing to form the anti-light aging layer, and then applying the slurry 2 to the surface of the anti-light aging layer, and photocuring to form the anti-fouling hardening layer to obtain a composite part 1; Mixing the components in the raw materials for preparing the first OCA layer to obtain a first adhesive; mixing the components in the raw materials for preparing the second OCA layer to obtain a second adhesive; applying the first adhesive and the second adhesive to the upper and lower surfaces of the polarizer, respectively, to obtain a second composite; The uncoated side of the composite component 1 is bonded to the side of the polarizer coated with adhesive 1, and the thermal expansion balancing layer is bonded to the side of the polarizer coated with adhesive 2, and after curing and drying, the anti-aging polarized shading device is obtained.

[0183] Example 3 This embodiment provides an anti-aging polarized shading device, which includes an anti-fouling hardening layer, an anti-light aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer and a thermal expansion balance layer stacked in sequence. The material ratio and thickness of each layer are shown in Table 3 below: Table 3

[0184] The preparation method comprises the following steps: Mixing the components in the raw materials for preparing the anti-light aging layer to obtain slurry 1; mixing the components in the anti-fouling hardening layer to obtain slurry 2; firstly applying the slurry 1 to the surface of the substrate layer, and thermally curing to form the anti-light aging layer, and then applying the slurry 2 to the surface of the anti-light aging layer, and photocuring to form the anti-fouling hardening layer to obtain a composite part 1; Mixing the components in the raw materials for preparing the first OCA layer to obtain a first adhesive; mixing the components in the raw materials for preparing the second OCA layer to obtain a second adhesive; applying the first adhesive and the second adhesive to the upper and lower surfaces of the polarizer, respectively, to obtain a second composite; The uncoated side of the composite component 1 is bonded to the side of the polarizer coated with adhesive 1, and the thermal expansion balancing layer is bonded to the side of the polarizer coated with adhesive 2, and after curing and drying, the anti-aging polarized shading device is obtained.

[0185] Example 4 This embodiment provides an anti-aging polarized shading device, which is different from Embodiment 1 only in that the polyhydroxy acrylic resin in the raw material for preparing the anti-light aging layer is replaced by an equal weight of polyurethane acrylate, and the other steps are consistent with Embodiment 1.

[0186] Example 5 This embodiment provides an anti-aging polarized shading device, which is different from Embodiment 1 only in that the substrate layer is a PC layer with a thickness of 100 μm, the thermal expansion balance layer is a PC layer with a thickness of 100 μm, and the other steps are consistent with Embodiment 1.

[0187] Example 6 This embodiment provides an anti-aging polarized shading device, which is different from Embodiment 1 only in that the substrate layer is a PC layer with a thickness of 125 μm, the thermal expansion balance layer is a PC layer with a thickness of 125 μm, and the other steps are consistent with Embodiment 1.

[0188] Example 7 This embodiment provides an anti-aging polarized shading device, which is different from Embodiment 1 only in that the thickness of the substrate layer is 125 μm, the thickness of the thermal expansion balance layer is 100 μm, and the other steps are consistent with Embodiment 1.

[0189] Example 8 This embodiment provides an anti-aging polarized shading device, which is different from Embodiment 1 only in that the epoxy resin in the preparation materials of the first OCA layer and the second OCA layer is replaced by an equal weight of phenolic resin, and the other steps are consistent with Embodiment 1.

[0190] Comparative Example 1 This comparative example provides an anti-aging polarized shading device, which is different from Example 1 only in that the anti-fouling hardening layer comprises, by weight: 50 parts of hydroxyl-containing polyurethane acrylate, 40 parts of dipentaerythritol hexaacrylate, 5 parts of pentaerythritol triacrylate, 3 parts of 2-isopropylthioxanthone, 3 parts of tetra[ β -(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester 2 parts, perfluoropolyether 5 parts, other steps are consistent with Example 1.

[0191] Comparative Example 2 This comparative example provides an anti-aging polarized shading device, which is different from Example 1 only in that pentaerythritol triacrylate is not added, the content of isobornyl acrylate is increased to 25 parts, and the content of polyurethane acrylate is increased to 35 parts. Other steps are consistent with Example 1.

[0192] Comparative Example 3 This comparative example provides an anti-aging polarized shading device, which is different from Example 1 only in that isobornyl acrylate is not added, the content of pentaerythritol triacrylate is increased to 20 parts, and the content of polyurethane acrylate is increased to 40 parts, and the other steps are consistent with Example 1.

[0193] Comparative Example 4 This comparative example provides an anti-aging polarized shading device, which is different from Example 1 only in that no polyurethane acrylate is added, the content of pentaerythritol triacrylate is increased to 20 parts, isobornyl acrylate is increased to 30 parts, tetraethylene glycol diacrylate is increased to 10 parts, and tetrahydrofurfuryl acrylate is increased to 20 parts, and the other steps are consistent with Example 1.

[0194] Comparative Example 5 This comparative example provides an anti-aging polarized shading device, which is different from Example 1 only in that tetrahydrofurfuryl acrylate is not added and is replaced by an equal mass of methyl methacrylate, and the other steps are consistent with Example 1.

[0195] Comparative Example 6 This comparative example provides an anti-aging polarized shading device, which is different from Example 1 only in that N,N -Dimethylacrylamide was replaced with an equal mass of 4-tert-butylcyclohexyl acrylate, and the other steps were consistent with Example 1.

[0196] Test Example 1 Hardened layer related tests Test samples: the anti-aging polarized shading devices provided in Examples 1 to 8, and the anti-aging polarized shading devices provided in Comparative Examples 1 to 6.

[0197] Test method: (1) Adhesion: Draw 100 1×1 mm square grids on the surface of the antifouling hardened layer; use 610-1PK transparent tape produced by 3M Company of the United States to stick them evenly on the grids without leaving any gaps, then peel it off at the fastest speed of 60° to observe whether there is delamination at the edge of the scratch; if there is no delamination, it is 5B; if the delamination amount is ≤5%, it is 4B; if it is between 5% and 15%, it is 3B; if it is between 15% and 35%, it is 2B; if it is between 35% and 65%, it is 1B; if it is 65% and above, it is 0B.

[0198] (2) Hardness: According to the ASTM D3363 standard, the test method is to use a series of pencils with hardness ranging from soft to hard (such as 6B to 9H) to scratch the coating surface at a fixed angle and uniform force, and gradually test until the highest hardness pencil that does not scratch the coating is found.

[0199] (3) Flexibility: Bend the diaphragm against a 5 mm diameter mandrel 10 times; "OK" means no cracks; "NG" means cracks.

[0200] (4) Scratch resistance: Withstands scratching by Japanese Rhino brand 0000# steel wool, 500 grams of force, 40 times back and forth / minute; "OK" means no obvious scratches; "NG" means obvious scratches.

[0201] The specific test results of the antifouling hardened layer are shown in Table 4 below: Table 4

[0202] As shown in Table 4, the antifouling hardened layer of the anti-aging polarized shading device provided in Examples 1 to 8 has an adhesion of 5B or more, and the hardness can be adjusted between H and B according to the device requirements, the optimal solution is HB, and the flexibility and scratch resistance of the layer are excellent. This shows that the antifouling hardened layer of the present invention comprises a composite acrylic resin of a specific composition and ratio and adds a fluorine-containing polymer as an antifouling and anti-fingerprint additive. Through the mutual cooperation of multiple acrylic esters, the compatibility is good, and a hardened coating with excellent formability can be formed, and its scratch resistance, wear resistance, chemical resistance, weather resistance and antifouling properties are significantly improved.

[0203] Test Example 2 Anti-aging polarization shading device related tests Test sample: the anti-aging polarized shading device provided in Examples 1 to 8.

[0204] Test method: (1) Transmittance: Use German BYK transmission haze meter to measure the transmittance of the film.

[0205] (2) Thickness: Use a micrometer to measure the thickness at 10 different points and take the average value.

[0206] (3) Thickness consistency: Take five 3 cm × 3 cm square samples in the film width direction, measure the thickness of the four sides with a micrometer to obtain 20 thickness data, and then find the maximum difference between the average thickness and the average thickness, and divide the difference by the average thickness.

[0207] (4) Anti-light aging: The number of days of light aging testing is tested by QLAB UV aging tester.

[0208] (5) Resistance to high temperature and high humidity: Test the tolerance time in a high temperature and high humidity test at 85°C and 85% humidity.

[0209] The specific test results are shown in Table 5 below: Table 5

[0210] As shown in Table 5, the hardening layer of the anti-aging polarization shading device has excellent ability to prevent external physical damage and chemical solvent damage; the anti-light aging layer has excellent ability to prevent organic aging, and the car is exposed to direct sunlight and requires a long service life, preventing ultraviolet rays from damaging the polymer materials in each layer, reducing the yellowing, fogging, and powdering of the polymer materials under ultraviolet rays, and preventing ultraviolet rays from affecting the hardening effect of the two layers of OCA, resulting in decreased adhesion and film removal during use; the optical film substrate can effectively improve the overall flame retardant effect, while preventing water vapor from penetrating and damaging the polarizer material; the first OCA layer connects the substrate layer and the polarizer, the second OCA layer connects the polarizer and the thermal expansion balance layer, and provides a certain degree of flexibility, and OCA can also block the erosion of water vapor on the polarizer; the polarizer can provide a non-uniform grating polarizer, which can improve its color restoration when there is a polarization angle error; the thermal expansion balance layer is used when the head-up display product is curved, in order to ensure good adhesion of the curved surface.

[0211] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An anti-aging polarized shading device, characterized in that: The anti-aging polarized shading device comprises an anti-fouling hardening layer, an anti-light aging layer, a substrate layer, a first OCA layer, a polarizer, a second OCA layer and a thermal expansion balancing layer stacked in sequence; The antifouling hardening layer comprises a composite acrylic resin and an antifouling additive in a mass ratio of 100:(0.1-10); wherein the raw materials for preparing the composite acrylic resin comprise, by weight: 5-15 parts of pentaerythritol triacrylate, 15-25 parts of isobornyl acrylate, 25-35 parts of polyurethane acrylate, 1-10 parts of tetraethylene glycol diacrylate, 10-20 parts of tetrahydrofurfuryl acrylate, N,N - 10-20 parts of dimethyl acrylamide and 0.5-3 parts of a light curing agent; the antifouling additive comprises a fluorine-containing polymer.

2. The anti-aging polarization shading device according to claim 1, characterized in that: The photocuring agent is selected from any one of benzophenone, 2-isopropylthioxanthone, dimethylbenzil ketal, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinyl-1-propanone, 2-hydroxy-2-methyl-1-phenyl-1-propanone or 2-phenylbenzyl-2-dimethylamine-1-(4-morpholinobenzylphenyl)butanone or a combination of at least two thereof; And / or, the composite acrylic resin further comprises: 0.5 to 3 parts of an antioxidant; And / or, the antioxidant is selected from four [ β Any one or a combination of at least two of [3,5-di-tert-butyl-4-hydroxyphenyl] propionate, dilauryl thiodipropionate, dioctadecyl pentaerythritol diphosphite, tetrakis(2,4-di-tert-butylphenyl) 4,4'-biphenylene diphosphate or dilauryl thiodipropionate; And / or, the antifouling additive is selected from any one or a combination of at least two of perfluoropolyether, polyfluorosilicone, bis(trimethoxysilylpropylcarbamate)perfluoropolyether, perfluorodecyltriethoxysilane, perfluorodecyltriethoxysilane or perfluorooctyltrimethoxysilane; And / or, the antifouling hardened layer has a thickness of 1 to 15 μm.

3. The anti-aging polarization shading device according to claim 1, characterized in that: The raw materials for preparing the anti-light aging layer include, by weight: 10-20 parts of polyhydroxy acrylic resin, 1-10 parts of isocyanate curing agent, 0-20 parts of infrared absorber, 1-10 parts of ultraviolet absorber, 0.1-5 parts of surfactant, and 60-80 parts of composite solvent; And / or, the composite solvent comprises a high molecular weight solvent and a low molecular weight solvent in a mass ratio of (8.5-9.8):(0.2-1.5); wherein the high molecular weight solvent comprises N - any one of methyl-2-pyrrolidone, cyclohexanone or xylene or a combination of at least two thereof, wherein the small molecular weight solvent comprises any one of isopropanol, butanone or ethyl acetate or a combination of at least two thereof; And / or, the surfactant is selected from any one or a combination of at least two of alkyl sulfate esters of C12 or higher, linear alcohol polyoxyethylene ether sulfates, sulfated triglycerides, polyoxyethylene alkylphenols, linear alcohol polyoxyethylene ethers, polyether-modified polydimethylsiloxanes or polyureas; And / or, the hydroxyl value of the polyhydroxy acrylic resin is 10 to 150 mgKOH / g; And / or, the polyhydroxy acrylic resin is selected from any one or a combination of at least two of HU840K from Laiyang Hongan, HA865 from Kunshan Custer, LR7601 from Mitsubishi, or DS-2055 from Nantong Baisen Chemical; and / or, the isocyanate curing agent is selected from hexamethylene diisocyanate and / or isophorone diisocyanate; And / or, the isocyanate curing agent is selected from any one or a combination of at least two of BASF HDI type N3300, BASF IPDI type XP 2400, Wanhua HDI 200, Wanhua IPDI 200, Covestro HDI type L75 or Covestro IPDI type I100; And / or, the infrared absorber comprises an organic dye and a metal oxide in a mass ratio of (0.05-2):(8-10); wherein the organic dye is selected from indole near-infrared fluorescent organic dyes, and the metal oxide is selected from nano rare earth metal oxide powders; and / or, the organic dye is selected from any one or a combination of at least two of IR780, IR820, IR956, IR1008 or IR1086; And / or, the particle size of the nano rare earth metal oxide powder is 20-50 nm, and the specific surface area of ​​the nano rare earth metal oxide powder is 30-60 m 2 / g; And / or, the metal oxide is selected from any one or a combination of at least two of tungsten oxide, tungsten-cesium oxide, tungsten-gold-vanadium oxide, tungsten-vanadium-tin-antimony oxide, and cesium-tungsten bronze; And / or, the ultraviolet absorber is selected from any one or a combination of at least two of a benzotriazole ultraviolet absorber, a triazine ultraviolet absorber or a phenylbenzimidazole ultraviolet absorber; And / or, the benzotriazole ultraviolet absorber is selected from any one of UV326, UV327, UV329 or UVP, or a combination of at least two thereof; And / or, the triazine ultraviolet absorber is selected from any one of Tinuvin 400, Tinuvin 405 or UV-1577 or a combination of at least two thereof; And / or, the phenylbenzimidazole ultraviolet absorber is selected from any one of Tinuvin 328, Tinuvin 360 or UV-1226 or a combination of at least two thereof; And / or, the thickness of the anti-light aging layer is 5-30 μm.

4. The anti-aging polarization shading device according to claim 1, characterized in that: The substrate layer includes an optically highly transparent material, and the optically highly transparent material has a light transmittance greater than 85%; And / or, the optically high-transmittance material is selected from any one or a combination of at least two of PC, PET, PEN, PETG, COP or PMMA; And / or, the thickness of the substrate layer is 75-200 μm.

5. The anti-aging polarized shading device according to claim 1, characterized in that: The raw materials for preparing the first OCA layer and the second OCA layer include, by weight: 100 parts of high-transmittance acrylic resin, 0.5-2 parts of epoxy resin, 0.5-2 parts of water-blocking material and 0.1-1 parts of antioxidant; And / or, the light transmittance of the high-transmittance acrylic resin is 85-93%; And / or, the water-blocking material is selected from nano inorganic particles; wherein the nano inorganic particles include any one of nano zinc oxide, nano silicon dioxide, nano zirconium oxide or cellulose nanocrystals or a combination of at least two thereof; And / or, the antioxidant is selected from any one or a combination of at least two of methyl silicone, hexaethylphosphoric triamide or dialkyl phosphite; And / or, the thickness ratio of the first OCA layer to the second OCA layer is 1:(1-1.25); And / or, the thickness of the first OCA layer is 10-100 μm, and the thickness of the second OCA layer is 10-125 μm.

6. The anti-aging polarized shading device according to claim 1, characterized in that: The polarizer includes a polarizer grating layer and protective film layers located on the upper and lower surfaces of the polarizer grating layer; wherein the polarizer grating layer includes polyvinyl alcohol and a high-temperature resistant dichroic pigment in a mass ratio of 100:(1-10); the protective film layer includes cellulose triacetate; And / or, the high temperature resistant dichroic pigment comprises any one or a combination of at least two of a disazo dichroic dye, anthraquinone dichroic dye, triphenoxadiazine and derivative dichroic dye, monomethine dichroic dye or polymethine dichroic dye; And / or, the thickness of the polarizer is 100-200 μm; And / or, the thickness of the polarizer grating layer is 20-100 μm, and the thickness of the protective film layers on the upper and lower surfaces of the polarizer grating layer are independently 20-50 μm.

7. The anti-aging polarized shading device according to claim 1, characterized in that: The thermal expansion balancing layer comprises an optically highly transparent material, and the light transmittance of the optically highly transparent material is greater than 85%; And / or, the optically highly transparent material is selected from any one of PC, PET, PEN, PETG, COP or PMMA, or a combination of at least two thereof.

8. A method for preparing an anti-aging polarized shading device according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: Mixing the components in the raw materials for preparing the anti-light aging layer to obtain slurry 1; mixing the components in the anti-fouling hardening layer to obtain slurry 2; firstly applying the slurry 1 to the surface of the substrate layer, and thermally curing to form the anti-light aging layer, and then applying the slurry 2 to the surface of the anti-light aging layer, and photocuring to form the anti-fouling hardening layer to obtain a composite part 1; Mixing the components in the raw materials for preparing the first OCA layer to obtain a first adhesive; mixing the components in the raw materials for preparing the second OCA layer to obtain a second adhesive; applying the first adhesive and the second adhesive to the upper and lower surfaces of the polarizer, respectively, to obtain a second composite; The uncoated side of the composite component 1 is bonded to the side of the polarizer coated with adhesive 1, and the thermal expansion balancing layer is bonded to the side of the polarizer coated with adhesive 2, and after curing and drying, the anti-aging polarized shading device is obtained.

9. Use of the anti-aging polarized shading device according to any one of claims 1 to 7 in the preparation of a head-up display panel.

10. A head-up display panel, characterized in that: The head-up display panel includes the anti-aging polarization shading device according to any one of claims 1 to 7.

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