WO2012086560A1 - 反射防止材料 - Google Patents
反射防止材料 Download PDFInfo
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- WO2012086560A1 WO2012086560A1 PCT/JP2011/079268 JP2011079268W WO2012086560A1 WO 2012086560 A1 WO2012086560 A1 WO 2012086560A1 JP 2011079268 W JP2011079268 W JP 2011079268W WO 2012086560 A1 WO2012086560 A1 WO 2012086560A1
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- 239000000463 material Substances 0.000 title claims abstract description 109
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 145
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- 238000000576 coating method Methods 0.000 claims abstract description 86
- 239000011248 coating agent Substances 0.000 claims abstract description 82
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- 239000000377 silicon dioxide Substances 0.000 claims description 23
- 125000004432 carbon atom Chemical group C* 0.000 claims description 19
- 150000001875 compounds Chemical class 0.000 claims description 15
- 125000000217 alkyl group Chemical group 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 8
- 125000004429 atom Chemical group 0.000 claims description 8
- 125000000524 functional group Chemical group 0.000 claims description 8
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- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052726 zirconium Inorganic materials 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
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- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 3
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- WDHYRUBXLGOLKR-UHFFFAOYSA-N phosphoric acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OP(O)(O)=O WDHYRUBXLGOLKR-UHFFFAOYSA-N 0.000 description 3
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- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 2
- LEJBBGNFPAFPKQ-UHFFFAOYSA-N 2-(2-prop-2-enoyloxyethoxy)ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOC(=O)C=C LEJBBGNFPAFPKQ-UHFFFAOYSA-N 0.000 description 2
- XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 description 2
- INQDDHNZXOAFFD-UHFFFAOYSA-N 2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOC(=O)C=C INQDDHNZXOAFFD-UHFFFAOYSA-N 0.000 description 2
- HCLJOFJIQIJXHS-UHFFFAOYSA-N 2-[2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOCCOC(=O)C=C HCLJOFJIQIJXHS-UHFFFAOYSA-N 0.000 description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
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- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 2
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 229960002130 benzoin Drugs 0.000 description 2
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- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 2
- QUZSUMLPWDHKCJ-UHFFFAOYSA-N bisphenol A dimethacrylate Chemical compound C1=CC(OC(=O)C(=C)C)=CC=C1C(C)(C)C1=CC=C(OC(=O)C(C)=C)C=C1 QUZSUMLPWDHKCJ-UHFFFAOYSA-N 0.000 description 2
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
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- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
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- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 2
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- YDKNBNOOCSNPNS-UHFFFAOYSA-N methyl 1,3-benzoxazole-2-carboxylate Chemical compound C1=CC=C2OC(C(=O)OC)=NC2=C1 YDKNBNOOCSNPNS-UHFFFAOYSA-N 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
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- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
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- MYWQGROTKMBNKN-UHFFFAOYSA-N tributoxyalumane Chemical compound [Al+3].CCCC[O-].CCCC[O-].CCCC[O-] MYWQGROTKMBNKN-UHFFFAOYSA-N 0.000 description 2
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- PRBBFHSSJFGXJS-UHFFFAOYSA-N (2,2-dimethyl-3-prop-2-enoyloxypropyl) prop-2-enoate;3-hydroxy-2,2-dimethylpropanoic acid Chemical class OCC(C)(C)C(O)=O.C=CC(=O)OCC(C)(C)COC(=O)C=C PRBBFHSSJFGXJS-UHFFFAOYSA-N 0.000 description 1
- HJIAMFHSAAEUKR-UHFFFAOYSA-N (2-hydroxyphenyl)-phenylmethanone Chemical compound OC1=CC=CC=C1C(=O)C1=CC=CC=C1 HJIAMFHSAAEUKR-UHFFFAOYSA-N 0.000 description 1
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- SGCGFUOYEVLOPJ-UHFFFAOYSA-N (3-hydroxy-3-phenoxypropyl) prop-2-enoate Chemical compound C=CC(=O)OCCC(O)OC1=CC=CC=C1 SGCGFUOYEVLOPJ-UHFFFAOYSA-N 0.000 description 1
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 1
- UIQCRIFSBWGDTQ-UHFFFAOYSA-N 1,1,2,2,3,3,4,4,5,5,6,6,7,7,10,10,10-heptadecafluorodecyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)CCC(F)(F)F UIQCRIFSBWGDTQ-UHFFFAOYSA-N 0.000 description 1
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- MLKIVXXYTZKNMI-UHFFFAOYSA-N 1-(4-dodecylphenyl)-2-hydroxy-2-methylpropan-1-one Chemical compound CCCCCCCCCCCCC1=CC=C(C(=O)C(C)(C)O)C=C1 MLKIVXXYTZKNMI-UHFFFAOYSA-N 0.000 description 1
- ZDQNWDNMNKSMHI-UHFFFAOYSA-N 1-[2-(2-prop-2-enoyloxypropoxy)propoxy]propan-2-yl prop-2-enoate Chemical compound C=CC(=O)OC(C)COC(C)COCC(C)OC(=O)C=C ZDQNWDNMNKSMHI-UHFFFAOYSA-N 0.000 description 1
- KCKJMQMEWMHVCH-UHFFFAOYSA-N 1-butoxy-2-[2-(2-hydroxyethoxy)ethoxy]ethanol;prop-2-enoic acid Chemical compound OC(=O)C=C.CCCCOC(O)COCCOCCO KCKJMQMEWMHVCH-UHFFFAOYSA-N 0.000 description 1
- JWYVGKFDLWWQJX-UHFFFAOYSA-N 1-ethenylazepan-2-one Chemical compound C=CN1CCCCCC1=O JWYVGKFDLWWQJX-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/113—Anti-reflection coatings using inorganic layer materials only
- G02B1/115—Multilayers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/14—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
Definitions
- the present invention relates to an antireflection material, and more specifically, a coating film that can be produced by a single coating, wherein the reflectance in a low wavelength region (400 nm) and a long wavelength region (800 nm) of an optical wavelength is Each has 3.5% or less, the minimum reflectance is 0.8% or less, has an antireflection performance with a peak position of 460 to 720 nm, and the haze value is 1 from the base material.
- the present invention relates to an antireflection material that can be made 5% or less.
- the minimum reflectance of the single layer film formed on the support is calculated by the following equation (1).
- R min [(n 1 2 ⁇ n 0 n 2 ) / (n 1 2 + n 0 n 2 )] 2 (1)
- n 0 the refractive index of air
- n 1 the refractive index of the film
- n 2 the refractive index of the support
- silica is made into a hollow structure or a porous structure (for example, see Patent Documents 1 and 2), or nano-sized bubbles are formed in the film (for example, see Patent Document 3).
- a method has been proposed in which an air layer is formed in a film by this method to lower the refractive index of the film.
- the antireflection film in which the pyramid-shaped convex portions (fine concavo-convex structure) are formed has a continuously changing cross-sectional area when cut in the film surface direction, and gradually from the air to the substrate. Since the refractive index increases, it becomes an effective antireflection means.
- the antireflection film exhibits excellent optical performance that cannot be replaced by other methods.
- the productivity is high.
- the air layer is uniformly distributed in the film, it is considered that a film having a constant refractive index can be obtained.
- the minimum value Rmin of the reflectance is determined from the above formula (1), and then the peak wavelength is determined from the film thickness.
- the minimum value of the reflectance is designed so that its peak position comes around a wavelength of about 550 nm, which is most easily felt by human eyes. Therefore, the reflectance increases on the low wavelength side (400 nm) and the long wavelength side (800 nm) of the optical wavelength, and the color (blue or red to yellow) becomes conspicuous (see Simulation-1 described later). .
- An antireflection film is prepared by The thickness of each layer is sufficiently thick compared to the particle size of the silica particles used, so the surface of each layer is smooth, and it is necessary to prepare multiple paints, and there are problems such as poor productivity due to repeated coating is there.
- Patent Document 4 a mold having a fine pattern is produced by an advanced technique used for production of optical components and the like, and a heat, pressure, photocuring technique using this mold and a high-precision press device is used. By transferring the shape to the substrate, a material having a nano-sized surface shape is obtained.
- it is considered very expensive and difficult to produce in a large area.
- the present invention has been made under such circumstances, and is a coating film that can be produced by a single coating, and reflects in a low wavelength region (400 nm) and a long wavelength region (800 nm) of an optical wavelength. Each has a low reflection rate of 3.5% or less, a minimum reflectance value of 0.8% or less, and has an antireflection performance with a peak position of 460 to 720 nm. It is an object of the present invention to provide an antireflection material that can be changed to 1.5% or less.
- the present inventors paid attention to a film structure composed of silica particles, a binder, and an air reservoir in order to lower the refractive index of the coating film.
- the silica particles are arranged in two layers from the surface of the base material, and the first layer of silica particles is spread on the surface of the base material.
- the silica particles were arranged in an abundance ratio of preferably 10 to 90% with respect to the number of silica particles in the first layer so as to cover a part of the silica particles.
- the ratio of the binder / silica particles is preferably in the range of 1/99 to 20/80 in terms of mass ratio, so that the silica particles and the base material, and the first layer silica particles and the second layer An air pocket was formed between the silica particles.
- H2 / H1 is preferably 1.5 or more and 2.1 or less when the distance H1 from the base material to the upper end of the first layer silica particles and the distance H2 from the base material to the upper end of the second layer silica particles are set. I made it.
- Such a structure has a two-stage refractive index gradient structure in which the refractive index gradually increases ⁇ decreases and further increases ⁇ decreases from the substrate side, and the refractive index gradually decreases as a whole film.
- the present invention (1) A coating film comprising a binder, silica particles, and an air reservoir provided on at least a part of a base material surface having translucency, wherein the silica particles are arranged in two layers from the base material surface.
- the first layer on the substrate side is covered with particles and has the air reservoir between the substrate and the silica particles, and the second layer silica particles are the first layer silica.
- An antireflection material characterized in that it covers a part of the particles and has the air reservoir between the first layer silica particles and the second layer silica particles, (2)
- the ratio of binder / silica particles is 1/99 to 20/80 by mass
- the number of silica particles in the second layer is 10 to 90 with respect to the number of silica particles in the first layer.
- the distance H1 from the base material to the upper end of the first layer particle and the distance H2 from the base material to the upper end of the second layer particle satisfy the following formula (2).
- the antireflection material as described 1.5 ⁇ H2 / H1 ⁇ 2.1 (2) (4) The antireflection according to any one of (1) to (3) above, wherein the average particle diameter of the silica particles is 50 to 180 nm and the coefficient of variation CV value of the particle size distribution is 35% or less. material, (5) The antireflection material as described in any one of (1) to (4) above, wherein the binder is a compound having a polymerizable functional group. (6) The antireflection material as described in any one of (1) to (5) above, which is a compound having at least one polymerizable functional group selected from the group consisting of acryloyl group, methacryloyl group and vinyl group.
- the binder is represented by the following general formula (3) (R 1 ) n M (OR 2 ) mn (3) Wherein R 1 is a non-hydrolyzable group, R 2 is an alkyl group having 1 to 6 carbon atoms, M is a metal atom selected from silicon, titanium, zirconium and aluminum, and m is a metal atom M A valence of 3 or 4, and n is an integer from 0 to 2 when m is 4, and an integer from 0 to 1 when m is 3.)
- the present invention has a coating film that can be produced by one coating, and the reflectance in the low wavelength region (400 nm) and the long wavelength region (800 nm) of the optical wavelength is 3.5% or less, respectively.
- An antireflection material that can be provided can be provided.
- Applications of the antireflection material thus obtained include display elements such as organic EL, liquid crystal, and plasma display panels, display portions of display devices, glass windows of buildings or automobiles, surface layers of traffic signs, and the like. Can be mentioned.
- the antireflection layer which comprises the relief hologram used as a countermeasure against forgery is mentioned.
- the relief hologram is configured to include a reflection layer and an antireflection layer, and is provided, for example, on a card, banknote, gift certificate or the like.
- various optical articles are mentioned. Examples of the optical article include an organic EL element, an LED element, and a front light as a light source.
- the use which improves electric power generation efficiency, ie, various solar cell panels, is mentioned.
- optical articles polarizing plates, diffraction gratings, wavelength filters, light guide plates, light diffusion films, sub-wavelength optical elements, color filters, condensing sheets, lighting fixture covers (organic EL lighting covers, LED lighting covers) Etc.).
- FIG. 3 is a scanning electron microscope image showing a laminated state of the first layer in Reference Example 1.
- FIG. 10 is a scanning electron microscope image showing a stacked state of the second layer in Reference Example 2.
- the antireflection material of the present invention is a coating film comprising a binder, silica particles, and air pockets provided on at least a part of a substrate surface having translucency, and the silica particles have two layers from the substrate surface.
- the first layer on the substrate side is covered with particles, and has the air reservoir between the substrate and the silica particles, and the second layer silica particles are A part of the silica particles of the first layer is covered, and the air pocket is provided between the silica particles of the first layer and the silica particles of the second layer.
- the light-transmitting base material used as a support (hereinafter sometimes referred to as a light-transmitting base material) is all light rays measured in accordance with JIS K 7136.
- Optical plastics having a transmittance of 30% or more, glass, and ceramics can be used.
- plastics examples include polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyethylene, polypropylene, cellophane, diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, polyvinyl chloride, polyvinylidene chloride, and polyvinyl alcohol. , Ethylene-vinyl acetate copolymer, polystyrene, polycarbonate, polymethylpentene, polysulfone, polyetheretherketone, polyethersulfone, polyetherimide, polyimide, fluororesin, polyamide, acrylic resin, norbornene resin, cycloolefin resin, etc.
- polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyethylene, polypropylene, cellophane, diacetyl cellulose, triacetyl cellulose, acet
- a plastic film, a sheet, or a molded product by injection molding or compression molding examples include float plate glass, polished plate glass, ground plate glass, and quartz glass defined in JIS R 3202.
- ceramics include oxides such as alumina, PLZT (lead lanthanum zirconate titanate), yttria-tria, and spinel, as well as nitride, carbide, and sulfide ceramics.
- the thickness of these base materials is not particularly limited and is appropriately selected according to the situation.
- this base material can be surface-treated by an oxidation method, an uneven
- the oxidation method include corona discharge treatment, plasma treatment, chromic acid treatment (wet), flame treatment, hot air treatment, ozone / ultraviolet irradiation treatment, and examples of the unevenness method include a sand blast method, a solvent, and the like. Treatment methods and the like. These surface treatment methods are appropriately selected according to the type of plastic, glass, or ceramic used as the substrate.
- the above-described coating solution for an antireflection material of the present invention is prepared by a conventionally known method such as dip coating, spin coating, spray coating, bar coating, knife coating, roll coating, After coating by a blade coating method, a die coating method, a gravure coating method or the like, the antireflection material of the present invention is formed on the substrate by natural drying or heat drying, and irradiation with light as necessary.
- binder As the binder constituting the coating film in the antireflection material of the present invention, a compound having a polymerizable functional group or the following general formula (3) (R 1 ) n M (OR 2 ) mn (3) Wherein R 1 is a non-hydrolyzable group, R 2 is an alkyl group having 1 to 6 carbon atoms, M is a metal atom selected from silicon, titanium, zirconium and aluminum, and m is a metal atom M A valence of 3 or 4, and n is an integer from 0 to 2 when m is 4, and an integer from 0 to 1 when m is 3.) -The polymer which has as a main skeleton the repeating unit of MO obtained by condensation reaction can be used.
- Examples of the compound having a polymerizable functional group include an ultraviolet curable resin and a thermosetting resin.
- UV curable resins include epoxy acrylates, epoxidized oil acrylates, urethane acrylates, polyester urethane acrylates, polyether urethane acrylates, unsaturated polyesters, polyester acrylates, polyether acrylates, vinyl / acrylates , Polyene / thiol-based, silicon acrylate-based, polybutadiene acrylate-based, polystilethyl methacrylate-based, polycarbonate diacrylate-based, and the like.
- Thermosetting resins include epoxy resins, phenol resins, alkyd resins, urea resins, melamine resins, unsaturated polyester resins, aromatic polyamide resins, polyamide-imide resins, vinyl ester resins, polyester-imide resins, polyimide resins. And thermosetting resins such as polybenzothiazole resins. These resins and monomers may be used alone or in combination of two or more. Resins and monomers that cure by different reaction mechanisms within the same molecule can also be used. Furthermore, when using these resins and monomers, a curing catalyst can be used depending on the resin and monomers.
- Known ultraviolet curable resins having one or two or more acryloyl groups or methacryloyl groups per molecule or vinyl groups (CH 2 ⁇ CH—), for example, allyl acrylate, allyl methacrylate, benzyl acrylate, benzyl Methacrylate, butoxyethyl acrylate, butoxymethacrylate, butoxyethyl metal acrylate, butadiol monoacrylate, butoxytriethylene glycol acrylate, t-butylaminoethyl methacrylate, caprolactone acrylate, 3-chloro-2-hydroxypropyl methacrylate, 2-cyanoethyl Acrylate, cyclohexyl acrylate, cyclohexyl methacrylate, gincopentanyl methacrylate, alicyclic modified neopentylglycol Acrylate, 2,3-dibromopropyl acrylate, 2,3-dipromopropyl me
- ethylene glycol diacrylate ethylene glycol dimethacrylate, ECH modified ethylene glycol dimethacrylate, glycerol acrylate / methacrylate, glycerol dimethacrylate, ECH modified glycerol triacrylate, 1,6-hexanediol diacrylate, ECH modified 1, 6-hexanediol diacrylate, 1,6-hexanediol dimethacrylate, long chain aliphatic diacrylate, long chain aliphatic dimethacrylate, methoxylated cyclohexyl diacrylate, neopentyl glycol diacrylate, neopentyl glycol dimethacrylate, hydroxypivalin Neopentyl glycol diacrylate, caprolactone-modified hydroxypivalate neopentyl glycol diacrylate Chryrate, pentaerythritol triacrylate, pentaery
- photoinitiators 4-phenoxydichloroacetophenone, 4-t-butyl-dichloroacetophenone, 4-t-butyl-trichloroacetophenone, diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropane -1-one, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 1- (4-dodecylphenyl) -2-hydroxy-2-methylpropan-1-one, 4 Acetophenones such as-(2-hydroxyethoxy-2-propyl) ketone, 1-hydroxycyclohexylphenylketone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1-, benzoin, benzoin Methyl ether, benzoin ethyl ether, benzoin isopropyl Benzoin
- 2,4,6, -trimethylbenzoyldiphenylphosphine oxide 2,4,6, -trimethylbenzoyldiphenylphosphine oxide, methylphenylglyoxylate, benzyl, 9,10-phenanthrenequinone, camphorquinone, dibensberon, 2-ethylanthraquinone, 4,4 It may be a known photoinitiator such as “-diethylisophthalelone” or may cause a polymerization reaction by ultraviolet rays.
- the polymer obtained by subjecting the compound represented by the general formula (3) to hydrolysis-condensation reaction is composed of the same MO particles repeating units each having the same silica particle and main skeleton as described later. From the viewpoint of good affinity and large adhesive strength, it can be preferably used for fixing silica particles described later and between silica particles and a substrate.
- R 1 represents a non-hydrolyzable group, and has, for example, an alkyl group having 1 to 20 carbon atoms, a (meth) acryloyloxy group, an epoxy group, a mercapto group, or the like.
- the alkyl group having 1 to 20 carbon atoms is preferably one having 1 to 10 carbon atoms, and this alkyl group may be linear, branched or cyclic.
- this alkyl group include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, pentyl, hexyl, octyl, and cyclopentyl. Group, cyclohexyl group and the like.
- alkyl group having 1 to 20 carbon atoms having a (meth) acryloyloxy group or an epoxy group or a mercapto group as a substituent an alkyl group having 1 to 10 carbon atoms having the above substituent is preferable. It may be any of a chain, a branch, and a ring. Examples of the alkyl group having this substituent include ⁇ -acryloyloxypropyl group, ⁇ -methacryloyloxypropyl group, ⁇ -glycidoxypropyl group, ⁇ -mercaptopropyl group, 3,4-epoxycyclohexyl group and the like. It is done.
- the alkenyl group having 2 to 20 carbon atoms is preferably an alkenyl group having 2 to 10 carbon atoms, and the alkenyl group may be linear, branched or cyclic.
- Examples of the alkenyl group include vinyl group, allyl group, butenyl group, hexenyl group, octenyl group and the like.
- As the aryl group having 6 to 20 carbon atoms those having 6 to 10 carbon atoms are preferable, and examples thereof include a phenyl group, a tolyl group, a xylyl group, and a naphthyl group.
- the aralkyl group having 7 to 20 carbon atoms is preferably one having 7 to 10 carbon atoms, and examples thereof include a benzyl group, a phenethyl group, a phenylpropyl group, and a naphthylmethyl group.
- R 2 is an alkyl group having 1 to 6 carbon atoms, which may be linear, branched, or cyclic. Examples thereof include methyl Group, ethyl group, n-propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, tert-butyl group, pentyl group, hexyl group, cyclopentyl group, cyclohexyl group and the like.
- M represents a metal atom selected from silicon, titanium, zirconium and aluminum
- m is a valence of the metal atom M, and is 3 in the case of aluminum. 4 for titanium or zirconium.
- n is an integer of 0 to 2 when m is 4, and an integer of 0 to 1 when m is 3.
- each R 1 When R 1 are a plurality, each R 1 may be mutually identical or different and, where OR 2 there are a plurality, each OR 2 may be the mutually the same, or different It may be.
- Examples of the alkoxide compound in the case where M is tetravalent silicon, m is 4, and n is an integer of 0 to 2 in the compound represented by the general formula (3) include tetramethoxysilane, Tetraethoxysilane, tetra-n-propoxysilane, tetraisopropoxysilane, tetra-n-butoxysilane, tetraisobutoxysilane, tetra-sec-butoxysilane, tetra-tert-butoxysilane, methyltrimethoxysilane, methyltriethoxy Silane, methyltripropoxysilane, methyltriisopropoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltriethoxysilane, butyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane,
- alkoxide compound in the case where M is tetravalent titanium or zirconium, m is 4, and n is an integer of 0 to 2 in the compound represented by the general formula (3) above The compound which replaced the silane in the illustrated silane compound with titanium or zirconium can be mentioned.
- examples of the alkoxide compound represented by the general formula (3) examples of the alkoxide compound in which M is trivalent aluminum, m is 3, and n is an integer of 0 to 1, Methoxy aluminum, triethoxy aluminum, tri-n-propoxy aluminum, triisopropoxy aluminum, tri-n-butoxy aluminum, triisobutoxy aluminum, tri-sec-butoxy aluminum, tri-tert-butoxy aluminum, methyl dimethoxy aluminum, methyl Examples include diethoxyaluminum, methyldipropoxyaluminum, ethyldimethoxyaluminum, ethyldiethoxyaluminum, and propyldiethoxyaluminum.
- alkoxide compounds may be used individually by 1 type, and may be used in combination of 2 or more type.
- oligomers such as alkoxysilane oligomers obtained by previously hydrolyzing and condensing the various alkoxide compounds can also be used.
- the hydrolysis-condensation reaction of the alkoxide compound of the general formula (3) is carried out by, for example, reacting the alkoxide compound with hydrochloric acid, sulfuric acid, nitric acid or the like in an appropriate polar solvent such as alcohol, cellosolve, ketone or ether.
- an appropriate polar solvent such as alcohol, cellosolve, ketone or ether.
- a cation exchange resin as a solid acid or a solid acid
- it is usually hydrolyzed at a temperature of 0 to 60 ° C., preferably 20 to 40 ° C.
- a solid acid After the removal, it can be carried out by further distilling off or adding the solvent as desired.
- a polymer having a repeating unit of MO M is the same as above
- a liquid (binder liquid) containing at a predetermined concentration can be obtained.
- nano-sized particles of tin oxide (antistatic), ITO (antistatic), ATO (antistatic), etc. as well as the purpose of controlling the refractive index, as needed
- a part of particles of nano-sized magnesium fluoride, alumina, titanium oxide, zirconium oxide or the like may be added, or an organic material can be used as long as silica particles described later can be fixed.
- silica particles are used as a component constituting the coating film.
- the silica particles are preferably monodispersed and spherical because the gaps between the particles are used for air accumulation, and the particle size affects the reflection waveform peak wavelength and transparency of the film.
- the average particle size is preferably 50 to 180 nm, more preferably 60 to 150 nm, and even more preferably 80 to 120 nm.
- the coefficient of variation CV value of the particle size distribution represented by the following formula in the silica particles is preferably 35% or less, more preferably 30% or less from the viewpoint of reducing the variation in the coating film thickness on which the silica particles are laminated. Preferably, 20% or less is more preferable.
- CV value (%) [standard deviation / average particle diameter] ⁇ 100
- the average particle diameter of the said silica particle and the variation coefficient CV value of a particle size distribution are the values measured according to the method shown below.
- ⁇ Measuring method of average particle diameter of silica particles After diluting with water so that the silica particle concentration became 1% by mass, a drop of the silica particle solution was dropped on a sample stage for an electron microscope and dried to prepare a sample. This sample was observed at 50,000 times with a scanning electron microscope, and the average particle diameter of silica particles was calculated from an image obtained by using image processing software from an electron microscope image.
- ⁇ Method for measuring CV value of silica particles After diluting with water so that the silica particle concentration became 1% by mass, a drop of the silica particle solution was dropped on a sample stage for an electron microscope and dried to prepare a sample. This sample was observed at 50,000 times with a scanning electron microscope, and after calculating the average particle diameter and standard deviation of silica particles from an image obtained using an image processing software from an electron microscope image, the CV value was calculated. Calculated according to the above formula.
- the coating film in the antireflection film of the present invention needs to contain an air pocket in order to lower the refractive index of the film together with the binder and silica particles described above.
- FIG. 1 is a schematic cross-sectional view showing the structure of an example of the antireflection film of the present invention, in which silica particles 3a of the first layer are spread on the surface of a light-transmitting substrate 1 with a binder layer 2 interposed therebetween.
- the second-layer silica particles 3b are arranged so as to cover a part of the first-layer silica particles 3a.
- An air reservoir 4a exists between the binder layer 2 on the translucent substrate 1 and the first silica particle 3a, and the first silica particle 3a, the second silica particle 3b, There is an air reservoir 4b.
- the binder needs to be present at least at the contact point between the substrate surface and the silica particles and at the contact point between the silica particles and the silica particles.
- the space ratio (filling rate) occupied by the spheres (silica particles) is about 74%. Therefore, the maximum value of the porosity of the coating film in the antireflection material of the present invention is about 26%. It becomes. Since the gap is filled with the binder component, the smaller the amount of the binder, the better the void ratio. However, when the quantity is too small, the silica particles fall off. Therefore, the mass ratio (binder / particle mass ratio) between the binder and the silica particles is preferably 1/99 to 20/80, more preferably 2/98 to 15/85, and even more preferably 5/95 to 10/90.
- the ratio of the number of particles in the second layer to the number of particles in the first layer is preferably 10 to 90%, more preferably 20 to 80%, and even more preferably 40 to 60%. Note that the ratio of the number of particles in the second stage to the number of particles in the first stage is determined by applying image processing software from a scanning electron microscope image (50,000 times) of the sample with the first stage completely covered with particles.
- the number of particles calculated in the first layer was calculated as (X2 / X1) ⁇ 100 (%), where X2 was a value obtained by measuring a sample in which the first and second layers were arranged in the same manner.
- the following method is used as a method for confirming the state in which the second layer particles are laminated. That is, after observing a cross section with a scanning electron microscope (50,000 to 80,000 times), the photograph is arranged so that the base is down and the antireflection layer is up, and a line parallel to the base is drawn. Draw several. Subsequently, the parallel line which overlaps with the silica particle upper end of the 1st layer is chosen, and the distance H1 from a base material is measured. Similarly, the distance H2 from the substrate is measured for the second layer of silica particles, and H2 / H1 is calculated. The value of H2 / H1 is preferably 1.5 to 2.1, more preferably 1.7 to 1.9 if the particle size variation is small and the first layer is neatly covered.
- [Simulation 1] A film in which silica particles having a hollow structure described in Patent Document 1 are dispersed in a transparent resin matrix, and a coating film containing silica particles and / or porous silica particles having an air layer described in Patent Document 2 Is considered to have a constant refractive index because the air layer in the film is uniformly distributed.
- the refractive index (n) of the translucent base material is 1.63
- the thickness (d) of the film is 110 nm
- the translucent base material is used.
- FIG. 4 shows an image of a scanning electron microscope (JSM-6700F, manufactured by JEOL Ltd.) of the coating film in the obtained antireflection material as shown in FIG.
- the refractive index is calculated from the height h from the substrate and the cross-sectional shape at each height.
- the refractive index becomes the graph shown in FIG. 6, and when the refractive index is simulated with this structure, the reflection spectrum is as shown in FIG.
- Each reflectance R was evaluated in 11 steps according to the following formula. 10 points 0 ⁇ R ⁇ 0.2 9 points 0.2 ⁇ R ⁇ 0.4 8 points 0.4 ⁇ R ⁇ 0.6 7 points 0.6 ⁇ R ⁇ 0.8 6 points 0.8 ⁇ R ⁇ 1.0 5 points 1.0 ⁇ R ⁇ 1.2 4 points 1.2 ⁇ R ⁇ 1.4 3 points 1.4 ⁇ R ⁇ 1.6 2 points 1.6 ⁇ R ⁇ 1.8 1 point 1.8 ⁇ R ⁇ 2.0 0 points 2.0 ⁇ R
- the reflectance R min was evaluated in 11 steps according to the following formula. 10 points 0 ⁇ R min ⁇ 0.1 9 points 0.1 ⁇ R min ⁇ 0.2 8 points 0.2 ⁇ R min ⁇ 0.3 7 points 0.3 ⁇ R min ⁇ 0.4 6 points 0.4 ⁇ R min ⁇ 0.5 5 points 0.5 ⁇ R min ⁇ 0.6 4 points 0.6 ⁇ R min ⁇ 0.7 3 points 0.7 ⁇ R min ⁇ 0.8 2 points 0.8 ⁇ R min ⁇ 0.9 1 point 0.9 ⁇ R min ⁇ 1.0 0 point 1.0 ⁇ R min , or when there are multiple peaks (excluding interference waveforms derived from the substrate (for example, PET film with a hard coat layer)) or when not present in the visible light region (400 to 800 nm)
- the wavelength d was evaluated in 11 steps according to the following formula. 10 points 550 ⁇ d ⁇ 570 9 points 540 ⁇ d ⁇ 550, 570 ⁇ d ⁇ 580 8 points 530 ⁇ d ⁇ 540, 580 ⁇ d ⁇ 590 7 points 520 ⁇ d ⁇ 530, 590 ⁇ d ⁇ 600 6 points 510 ⁇ d ⁇ 520, 600 ⁇ d ⁇ 610 5 points 500 ⁇ d ⁇ 510, 610 ⁇ d ⁇ 620 4 points 490 ⁇ d ⁇ 500, 620 ⁇ d ⁇ 630 3 points 480 ⁇ d ⁇ 490, 630 ⁇ d ⁇ 640 2 points 470 ⁇ d ⁇ 480, 640 ⁇ d ⁇ 650 1 point 460 ⁇ d ⁇ 470, 650 ⁇ d ⁇ 660 0 point d ⁇ 460, 660 ⁇ d, or when there are multiple peaks (excluding interference waveforms derived from the substrate (for example,
- Binder Component-1 (B-1) 317.91 g of glycidoxypropyltrimethoxysilane and 146.66 g of a tetramethoxysilane oligomer “Corcoat Co., Ltd., trade name“ methyl silicate-51 ” It was dissolved in 242.70 g of methanol so that the mass ratio of the constituent units in the mixture was 3: 1, and a mixed solution of 32.43 g of nitric acid having a concentration of 0.1 mol / L, 225.64 g of water and 34.67 g of methanol was added thereto. Then, the mixture was reacted at 30 ° C. for 24 hours to prepare a binder liquid [(B) -1 component] having a solid content concentration of 30% by mass.
- Binder Component-2 (B-2) 289.05 g of mercaptopropyltrimethoxysilane and 222.05 g of titanium tetraisopropoxide were mixed so that the mass ratio of the constituent units in the condensate was 3: 1. After dissolving in 31.45 g of ethylene glycol mono-t-butyl ether, a mixed solution of 101.42 g of concentrated nitric acid, 30.40 g of water and 44.64 g of ethylene glycol mono-t-butyl ether was added dropwise thereto, followed by It was made to react for time and the binder liquid [(B) -2 component] with a solid content concentration of 25 mass% was prepared.
- Binder Component-3 (B-3) 264.93 g of glycidoxypropyltrimethoxysilane and 220.91 g of a 75 mass% zirconium-n-propoxide n-propanol solution were added to the constituent units in the condensate. It was dissolved in 367.07 g of ethylene glycol mono-t-butyl ether so that the mass ratio was 3: 1, and a mixed solution of 73.24 g of concentrated nitric acid, 21.43 g of water and 52.44 g of ethylene glycol mono-t-butyl ether was added thereto. Then, the mixture was reacted at 30 ° C. for 4 hours to prepare a binder liquid [(B) -3 component] having a solid content concentration of 25 mass%.
- Binder Component-4 (B-4) 289.05 g of mercaptopropyltrimethoxysilane and 99.99 g of aluminum-n-butoxide were mixed so that the mass ratio of the constituent units in the condensate was 3: 1. After dissolving in 352.09 g of ethylene glycol mono-t-butyl ether, a mixed solution of 80.71 g of concentrated nitric acid, 13.57 g of water and 64.58 g of ethylene glycol mono-t-butyl ether was added dropwise thereto, It was made to react for time and the binder liquid [(B) -4 component] with a solid content concentration of 25 mass% was prepared.
- Binder Component-5 25.00 g of methyl methacrylate and 75.00 g of ethylene glycol mono-t-butyl ether were mixed to form a binder liquid [(B)- Five components] were prepared.
- Binder Component-6 25.00 g of trimethylolpropane triacrylate and 75.00 g of ethylene glycol mono-t-butyl ether were mixed, and a binder liquid [(B -6 component] was prepared.
- Binder Component-7 (B-7) Urethane acrylate (made by Nippon Synthetic Chemical Industry Co., Ltd., trade name “UV-7600B” 25.00 g and ethylene glycol mono-t-butyl ether 75.00 g were mixed, A binder liquid [component (B) -7] having a solid content concentration of 25% by mass was prepared.
- Silica particle slurries S-1 to S-8 having a solid content concentration of 18% by mass dispersed in water were prepared as a silica material using Hi-Plesica (manufactured by Ube Nitto Kasei Co., Ltd.).
- Silica particle slurry S-9 is adjusted to 18% by mass by adding water to a commercially available water-dispersed silica particle slurry (Snowtex-O, manufactured by Nissan Chemical Industries, 20% by mass). Table 1 shows a list.
- the average particle size and CV value were measured according to the following method. ⁇ Measurement of average particle size> The silica particle slurry was diluted to 1% by mass with water and then dropped on a sample stage for an electron microscope and dried to prepare a sample. Observation was performed at 50,000 times with a scanning electron microscope (JSM-6700F, manufactured by JEOL Ltd.). The average particle diameter of the silica particles was calculated from an image obtained using an image processing software (Mac-View, manufactured by Mountec Co., Ltd.) from an electron microscope image. The results are shown in Table 1.
- Reference Example 1 First Layer Arrangement Study As a method for producing an antireflection material and a method for confirming the laminated state, the first layer arrangement was examined.
- the following reference examples are a method for producing an antireflection material by a bar coating method and a method for confirming a laminated state, but a method for producing an antireflective material by another coating method and a method for confirming a laminated state were also performed in the same manner.
- the above coating liquid P-2 was applied to the corona-treated surface with bar No (of the coating liquid). After coating by the bar coat method while changing the liquid film thickness), the film was dried in an oven at 120 ° C. for 2 minutes. The obtained film was observed with a scanning electron microscope (JSM-6700F, manufactured by JEOL Ltd.) at a magnification of 50,000 to observe the laminated state.
- JSM-6700F scanning electron microscope
- FIG. 8 shows a scanning electron microscope image of the laminated state of the first layer.
- (a) and (b) show a shortage state of silica particles
- (c) shows a state where silica particles are spread on a substrate.
- the coating conditions which can spread 1 layer of coating liquid P-2 were determined. However, if the optimum coating conditions were not found only with the bar count, we adjusted the concentration. In addition, the number of particles in the surface was calculated from the scanning electron microscope image of the sample that could be spread with one layer using image processing software (Mac-View, manufactured by Mountec Co., Ltd.). Table 3 shows the number of particles in a state where one layer of each coating liquid is packed.
- the one-layer coating is a bar no. No. 5 can be prepared, and when it is desired to produce 1.6 layers (the number of particles in the second layer is 60% of the number of particles in the first layer) It turned out that 8 should be sufficient.
- one-layer coating is a bar no. No. 5 can be prepared, and when it is desired to make 1.3 layers (the number of particles in the second layer is 30% of the number of particles in the first layer) 7. It was found that the concentration should be 0.93 times (the concentration after dilution is 1.86% by mass (IPA dilution)).
- the obtained film was observed at 50,000 times with a scanning electron microscope (JSM-6700F, manufactured by JEOL Ltd.). This scanning electron microscope image is shown in FIG.
- the number of particles in the second layer was calculated from the electron microscope image of the laminated coating sample using image processing software (Mac-View, manufactured by Mountec Co., Ltd.).
- Reference Example 3 Laminated Sample for Comparative Example (Laminated with 4 or more layers) For the coating conditions obtained from the “Study of arrangement of the first layer”, the bar No. Alternatively, coating was performed by adjusting the concentration.
- the one-layer coating is a bar no. No. 5 can be used to make a four-layer sample. It turned out that 20 should be sufficient.
- Example 1 Using A4 size cycloolefin polymer film / 100 ⁇ m (hereinafter COP) (manufactured by Nippon Zeon Co., Ltd.) subjected to corona treatment (50 dyne / cm), the coating liquid P-2 is coated on the corona-treated surface in the second layer. After coating by the bar coat method so that the number was 50% with respect to the number of particles in the first layer, the coating was dried in an oven at 120 ° C. for 2 minutes to prepare an antireflection material. The evaluation results of the obtained antireflection film are shown in Tables 4 and 5.
- COP A4 size cycloolefin polymer film / 100 ⁇ m
- Example 2 The same operation as Example 1 was implemented except having changed the coating liquid into P-1.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 3 The same operation as Example 1 was implemented except having changed the coating liquid into P-3.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 4 The same operation as Example 1 was implemented except having changed the coating liquid into P-4. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 5 The same operation as in Example 1 was performed except that the number of particles in the second layer was changed to 25% with respect to the number of particles in the first layer. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 6 The same operation as in Example 1 was performed except that the number of particles in the second layer was changed to 75% with respect to the number of particles in the first layer.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 7 The same operation as Example 1 was implemented except having changed the coating liquid into P-5. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 8 The same operation as Example 1 was implemented except having changed the coating liquid into P-6. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 9 The same operation as Example 1 was implemented except having changed the coating liquid into P-7.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 10 The same operation as Example 1 was implemented except having changed the coating liquid into P-8. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 11 The same operation as Example 1 was implemented except having changed the coating liquid into P-9. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 12 The same operation as Example 1 was implemented except having changed the coating liquid into P-10. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 13 The same operation as Example 1 was implemented except having changed the coating liquid into P-11. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 14 The same operation as in Example 1 was performed except that the coating liquid was changed to P-12, the drying temperature was changed to 80 ° C., and ultraviolet irradiation (high pressure mercury lamp, 500 mJ / cm 2 ) was performed after drying. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 15 The same operation as in Example 14 was performed except that the coating solution was changed to P-13. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 16 The same operation as in Example 14 was performed except that the coating solution was changed to P-14. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- PET corona-treated PET film
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 18 PET film with a hard coat layer obtained by corona treatment (50 dyne / cm) of the base material (base material: manufactured by Toray Industries, Lumirror T60 / 125 ⁇ m, HC material: UV curable resin (manufactured by Nippon Synthetic Chemical Co., Ltd., The same operation as in Example 1 was carried out except that the HC surface was changed to purple light UV-1700B), a photopolymerization initiator (manufactured by Nagase Sangyo Co., Ltd., Darocur 1173), and a thickness after curing of 10 ⁇ m). Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- base material manufactured by Toray Industries, Lumirror T60 / 125 ⁇ m
- HC material UV curable resin (manufactured by Nippon Synthetic Chemical Co., Ltd., The same operation as in Example 1 was carried out except that the HC surface was changed to purple light UV-1700B), a
- Example 19 The same operation as in Example 1 was performed, except that the coating method was changed to the dip coating method on a colorless transparent acrylic plate (Mitsubishi Rayon Co., Ltd., Acrylite L, 2 mm thickness) that was subjected to corona treatment (50 dyne / cm). did. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 20 The same operation as in Example 19 was performed except that the substrate was replaced with a glass plate (Matsunami Glass Kogyo, S9213) that was degreased (UI Chemical, White 7-AL). Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Comparative Example 1 The same operation as in Example 1 was performed except that the coating solution was changed to P-15.
- the coating liquid P-15 the silica particles were not fixed, and the conditions for laying one layer by the method of Reference Example 1 and the number of particles could not be determined. Therefore, the conditions were determined as the same as the coating liquid P-2. did.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 21 The same operation as Example 1 was implemented except having changed the coating liquid into P-16. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 22 The same operation as in Example 1 was performed except that the number of particles in the second layer was changed to 10% with respect to the number of particles in the first layer.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 23 The same operation as in Example 1 was performed except that the number of particles in the second layer was changed to 90% with respect to the number of particles in the first layer.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 24 The same operation as in Example 1 was performed except that the coating solution was changed to P-18.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 25 The same operation as in Example 1 was performed except that the coating solution was changed to P-19.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Example 26 The same operation as Example 1 was implemented except having changed the coating liquid into P-20. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Comparative Example 2 The same operation as in Example 1 was performed except that the coating solution was changed to P-17.
- the coating liquid P-17 silica particles aggregated, and the conditions for laying one layer by the method of Reference Example 1 and the number of particles could not be determined. Therefore, the conditions were determined as the same as the coating liquid P-2.
- Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Comparative Example 4 The same operation as in Comparative Example 3 was performed except that the coating solution was changed to P-21. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Comparative Example 6 The same operation as in Comparative Example 5 was performed except that the coating solution was changed to P-7. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- Comparative Example 7 The same operation as in Comparative Example 5 was performed except that the coating solution was changed to P-8. Tables 4 and 5 show the evaluation results of the obtained antireflection material.
- the antireflection material of the present invention has a coating film that can be produced by a single coating, and the reflectance in the low wavelength region (400 nm) and the long wavelength region (800 nm) of the optical wavelength is 3.5%, respectively.
- the antireflection performance is such that the minimum value of the reflectance is 0.8% or less and the peak position is 460 to 720 nm, and the change from the base material is 1.5% or less. It has some excellent properties.
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Abstract
Description
n0:空気の屈折率、n1:膜の屈折率、n2:支持体の屈折率であり、
空気の屈折率n0=1、支持体をPETフィルム(n2=1.63)としたとき、n1 2−n0n2=n1 2−1.63からn1 2=1.63(膜の屈折率:n1=1.28)で反射率Rmin=0が期待できる。
(1)透光性を有する基材表面の少なくとも一部に設けてなる、バインダー、シリカ粒子、空気溜りからなるコーティング膜であって、前記シリカ粒子は基材表面から2層で配列しており、基材側である1層目は粒子が敷き詰められていると共に、前記基材と前記シリカ粒子間に前記空気溜りを有しており、かつ2層目のシリカ粒子は前記1層目のシリカ粒子の一部を覆っていると共に、前記1層目のシリカ粒子と前記2層目のシリカ粒子間に前記空気溜りを有していることを特徴とする反射防止材料、
(2)コーティング膜において、バインダー/シリカ粒子の比率が質量比で1/99~20/80であり、かつ2層目のシリカ粒子数は、1層目のシリカ粒子数に対して10~90%の存在比率で配列してなる上記(1)項に記載の反射防止材料、
(3)基材から1層目粒子の上端までの距離H1と、前記基材から2層目粒子の上端までの距離H2が下記式(2)を満たす上記(1)または(2)項に記載の反射防止材料、
1.5≦H2/H1≦2.1…(2)
(4)シリカ粒子の平均粒径が50~180nmであると共に、その粒度分布の変動係数CV値が35%以下である上記(1)~(3)項のいずれか1項に記載の反射防止材料、
(5)バインダーが、重合性官能基を有する化合物である上記(1)~(4)項のいずれか1項に記載の反射防止材料。
(6)アクリロイル基またはメタクリロイル基、ビニル基からなる群から選ばれる重合性官能基を少なくとも1つ有する化合物である上記(1)~(5)項のいずれか1項に記載の反射防止材料。
(7)バインダーが、下記一般式
(3)(R1)nM(OR2)m−n…(3)
(式中、R1は非加水分解性基、R2は炭素数1~6のアルキル基、Mはケイ素、チタン、ジルコニウムおよびアルミニウムの中から選ばれる金属原子を示し、mは金属原子Mの価数で、3または4であり、nは、mが4の場合は0~2の整数、mが3の場合は0~1の整数である。)で表されるアルコキシド化合物を、加水分解−縮合反応して得られたM−Oの繰り返し単位を主骨格とする縮合物である上記(1)~(4)項のいずれか1項に記載の反射防止フィルム、
(8)基材の裏面を黒色化した場合の反射波形において、400nmおよび800nmにおける反射率が、それぞれ3.5%以下であって、反射率の最小値が0.8%以下であり、かつそのピーク位置が460~720nmの領域にある上記(1)~(7)項のいずれか1項に記載の反射防止材料、および
(9)ヘーズ値が、下記式(4)を満たす上記(1)~(8)項のいずれか1項に記載の反射防止材料、
|反射防止材料のヘーズ値−透光性を有する基材のヘーズ値|≦1.5…(4)
を提供するものである。
[反射防止材料の構造]
本発明の反射防止材料は、透光性を有する基材表面の少なくとも一部に設けてなる、バインダー、シリカ粒子、空気溜りからなるコーティング膜であって、前記シリカ粒子は基材表面から2層で配列しており、基材側である1層目は粒子が敷き詰められていると共に、前記基材と前記シリカ粒子間に前記空気溜りを有しており、かつ2層目のシリカ粒子は前記1層目のシリカ粒子の一部を覆っていると共に、前記1層目のシリカ粒子と前記2層目のシリカ粒子間に前記空気溜りを有していることを特徴とする。
本発明の反射防止材料において、支持体として用いられる透光性を有する基材(以下、透光性基材と称することがある。)としては、JIS K 7136に準拠して測定される全光線透過率が30%以上の光学用プラスチック、およびガラス、セラミックスを使用することができる。このようなプラスチックとしては、例えばポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレートなどのポリエステル、ポリエチレン、ポリプロピレン、セロファン、ジアセチルセルロース、トリアセチルセルロース、アセチルセルロースブチレート、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリビニルアルコール、エチレン−酢酸ビニル共重合体、ポリスチレン、ポリカーボネート、ポリメチルペンテン、ポリスルホン、ポリエーテルエーテルケトン、ポリエーテルスルホン、ポリエーテルイミド、ポリイミド、フッ素樹脂、ポリアミド、アクリル樹脂、ノルボルネン系樹脂、シクロオレフィン樹脂等のプラスチックフィルム、シート、又は射出成型や圧縮成型による成型品を挙げることができる。また、ガラスとしては、JIS R 3202に定められるフロート板ガラス、磨き板ガラス、すり板ガラス、または石英ガラス等を挙げることができる。セラミックスとしてはアルミナやPLZT(チタン酸ジルコン酸ランタン鉛)、イットリア−トリア、スピネルなどの酸化物系のほか、窒化物、炭化物及び硫化物系セラミックスなどを挙げることができる。
本発明の反射防止材料におけるコーティング膜を構成するバインダーとしては、重合性官能基を有する化合物または下記一般式(3)
(R1)nM(OR2)m−n…(3)
(式中、R1は非加水分解性基、R2は炭素数1~6のアルキル基、Mはケイ素、チタン、ジルコニウムおよびアルミニウムの中から選ばれる金属原子を示し、mは金属原子Mの価数で、3または4であり、nは、mが4の場合は0~2の整数、mが3の場合は0~1の整数である。)で表されるアルコキシド化合物を、加水分解−縮合反応して得られたM−Oの繰り返し単位を主骨格とする重合物を用いることができる。
また、熱硬化型樹脂としては、エポキシ樹脂、フェノール樹脂、アルキッド樹脂、尿素樹脂、メラミン樹脂、不飽和ポリエステル樹脂、芳香族ポリアミド樹脂、ポリアミド−イミド樹脂、ビニルエステル樹脂、ポリエステル−イミド樹脂、ポリイミド樹脂、ポリベンゾチアゾール樹脂などの熱硬化性樹脂を挙げることができる。これらの樹脂及び単量体は単独でも、二種以上組み合わせてもよい。また、同一分子内に異なる反応機構により硬化するような樹脂及び単量体も使用することができる。更に、これらの樹脂及び単量体の使用に際しては、樹脂及び単量体に応じて硬化触媒を用いることができる。
これら重合性官能基を有する化合物のなかで、硬化速度、安定性、入手し易さの観点から、特にアクリロイル基又はメタクリロイル基を1分子当り1個又は2個以上持つものやビニル基(CH2=CH−)などをもつ紫外線硬化型樹脂が好ましい。アクリロイル基又はメタクリロイル基を1分子当り1個又は2個以上持つものやビニル基(CH2=CH−)などをもつ公知の紫外線硬化型樹脂として、たとえば、アリルアクリレート、アリルメタクリレート、ベンジルアクリレート、ベンジルメタクリレート、ブトキシエチルアクリレート、ブトキシメタアクリレート、ブトキシエチルメタルクリレート、ブタジオールモノアクリレート、ブトキシトリエチレングリコールアクリレート、t−ブチルアミノエチルメタクリレート、カプロラクトンアクリレート、3−クロロ−2−ヒドロキシプロピルメタクリレート、2−シアノエチルアクリレート、シクロヘキシルアクリレート、シクロヘキシルメタクリレート、ジンクロペンタニルメタクリレート、脂環式変成ネオペンチルグリコールアクリレート、2,3−ジブロモプロピルアクリレート、2,3−ジプロモプロピルメタクリレート、ジシクロペンテニルアクリレート、ジシクロペンテニロキシエチルアクリレート、ジシクロペンテニロキシエチルメタクリレート、N,N−ジエチルアミノエチルアクリレート、N,N−ジエチルアミノエチルメタクリレート、N,N−ジメチルアミノエチルアクリレート、N,N−ジメチルアミノエチルメタクリレート、2−エトキシエチルアクリレート、2−エトキシエチルメタクリレート、2(2−エトキシエトキシ)エチルアクリレート、2−エチルヘキシルアクリレート、2−エチルヘキシルメタクリレート、グリセロールメタクリレート。グリシジルアクリレート、グリシジルメタクリレート、ヘプタデカフロロデシルアクリレート、ヘプタデカフロロデシルメタクリレート、2−ヒドロキシエチルアクリレート、2−ヒドロキシエチルメタクリレート、カプロラクトン変性2−ヒドロキシエチルアクリレート、カプロラクトン変性2−ヒドロキシエチルメタクリレート、2−ヒドロキシ−3−メタクリロキシプロピルトリメチルアンモニウムクロライド、2−ヒドロキシプロピルアクリレート、2−ヒドロキシプロピルメタクリレート、イソボニルアクリレート、イソボニルメタクリレート、イソデシルアクリレート、イソデシルメタクリレート、イソオクチルアクリレート、ラウリルアクリレート、ラウリルメタクリレート、γ−メタクリロキシプロピルトリメトキシシラン、2−メトキシエチルアクリレート、メトキシジエチレングリコールメタクリレート、メトキシトリエチレングリコールアクリレート、メトキシトリエチレングリコールメタクリレート、メトキシテトラエチレングリコールメタクリレート、メトキシポリエチレングリコールメタクリレート、メトキシジプロピレングリコールアクリレート、メトキシ化シクロデカトリエンアクリレート、モルホリンアクリレート、ノニルフェニルポリエチレングリコールアクリレート、ノニルフェノキシポリプロピレングリコールアクリレート、オクタフロロペンチルアクリレート、オクタフロロペンチルメタクリレート、オクチルアクリレート、フェノキシヒドロキシプロピルアクリレート、フェノキシエチルアクリレート、フェノキシエチルメタクリレート、フェノキシジエチレングリコールアクリレート、フェノキシテトラエチレングリコールアクリレート、フェノキシヘキサエチレングリコールアクリレート、EO(「EO」はエチレンオキシドを意味する。以下、同様)変性フェノキシ化りん酸アクリレート、EO変性フェノキシ化りん酸メタクリレート、フェニルメタクリレート、EO変性りん酸アクリレート、EO変性りん酸メタクリレート、EO変性ブトキシ化リン酸アクリレート、EO変性ブトキシ化リン酸メタクリレート、EO変性オクトキシ化リン酸アクリレート、EO変性オクトキシ化リン酸メタクリレート、EO変性フタル酸アクリレート、EO変性フタル酸メタクリレート、ポリエチレングリコールメタクリレート、ポリプロピレングリコールメタクリレート、ポリエチレングリコール/ポリプロピレングリコールメタクリレート、ポリエチレングリコール/ポリブチレングリコールメタクリレート、ステアリルアクリレート、ステアリルメタクリレート、EO変性コハク酸アクリレート、EO変性コハク酸メタクリレート、スルホン酸ソーダエトキシアクリレート、スルホン酸ソーダエトキシメタクリレート、テトラフロロプロピルアクリレート、テトラフロロプロピルメタクリレート、テトラヒドロフルフリルアクリレート、テトラヒドロフルフリルメタアクリレート、カプロラクタン変性テトラヒドロフルフリルアクリレート、トリフロロエチルアクリレート、トリフロロエチルメタクリレート、ビニルアセテート、N−ビニルカプロラクタム、N−ビニルピロリドン、スチレン、アリル化シクロヘキシルジアクリレート、アリル化イソシアヌレート、ビス(アクリロキシネオペンチルグリコール)アジペート、EO変性ビスフェノールAジアクリレート、EO変性ビスフェノールSジアクリレート、ビスフェノールAジメタクリレート、EO変性ビスフェノールAジメタクリレート、EO変性ビスフェノールFジアクリレート、1,4−ブタンジオ−ルジアクリレート、1,4−ブタンジオ−ルジメタクリレート、1,3−ブチレングリコールジメタクリレート、ジシクロペンタニルジアクリレート、ジエチレングリコールジアクリレート、ジエチレングリコールジメタクリレート、ジペンタエリスリトールヘキサアクリレート、ジペンタエリスリトールモノヒドロキシペンタアクリレート、アルキル変性ジペンタエリスリトールペンタアクリレート、アルキル変性ジペンタエリスリトールテトラアクリレート、アクリル変性ジペンタエリスリトールトリアクリレート、カプロラクトン変性ジペンタエリスリトールヘキサアクリレート、ジトリメチロールプロパンテトラアクリレート、ECH(「ECH」はエチルシクロヘキサンを意味する。以下、同様)変性エチレングリコールジアクリレート、エチレングリールジメタクリレート、ECH変性エチレングリコールジメタクリレート、グリセロールアクリレート/メタクリレート、グリセロールジメタクリレート、ECH変性グリセロールトリアクリレート、1,6−ヘキサンジオールジアクリレート、ECH変性1,6−ヘキサンジオールジアクリレート、1,6−ヘキサンジオールジメタクリレート、長鎖脂肪族ジアクリレート、長鎖脂肪族ジメタクリレート、メトキシ化シクロヘキシルジアクリレート、ネオペンチルグリコールジアクリレート、ネオペンチルグリコールジメタクリレート、ヒドロキシピバリン酸ネオペンチルグリコールジアクリレート、カプロラクトン変性ヒドロキシピバリン酸ネオペンチルグリコールジアクリレート、ペンタエリスリトールトリアクリレート、ペンタエリスリトールテトラアクリレート、ペンタエリスリトールテトラメタクリレート、ステアリン酸変性ペンタエリスリトールジアクリレート、EO変性リン酸トリアクリレート、EO変性リン酸ジアクリレート、EO変性リン酸ジメタクリレート、ECH変性フタル酸ジアクリレート、ポリエチレングリコールジアクリレート、ポリエチレングリコールジメタクリレート、ポリプロピレングリコールジアクリレート、ポリプロピレングリコールジメタクリレート、EHC変性プロピレングリコールジアクリレート、テトラエチレングリコールジアクリレート、テトラエチレングリコールジメタクリレート、テトラブロモビスフェノールAジアクリレート、トリエチレングリコールジアクリレート、トリエチレングリコールジメタクリレート、トリエチレングリコールジビニルエーテル、トリグリセロールジアクリレート、ネオペンチルグリコール変性トリメチロールプロパンジアクリレート、トリメチロールプロパントリアクリレート、EO変性トリメチロールプロパントリアクリレート、PO(「PO」はプロピレンオキシドを意味する。)変性トリメチロールプロパントリアクリレート、トリメチロールプロパントリメタクリレート、EHC変性トリメチロールプロパントリアクリレート、トリプロピレングリコールジアクリレート、トリス(アクリロキシエチル)イソシアヌレート、カプロラクトン変性トリス(アクリロキシエチル)イソシアヌレート、トリス(メタルクリロキシエチル)イソシアヌレートなどがあり、これらを必要に応じて1種または2種以上組み合わせて用いることができる。
光開始剤(増感剤)としては4−フェノキシジクロロアセトフェノン、4−t−ブチル−ジクロロアセトフェノン、4−t−ブチル−トリクロロアセトフェノン、ジエトキシアセトフェノン、2−ヒドロキシ−2−メチル−1−フェニルプロパン−1−オン、1−(4−イソプロピルフェニル)−2−ヒドロキシ−2−メチルプロパン−1−オン、1−(4−ドデシルフェニル)−2−ヒドロキシ−2−メチルプロパン−1−オン、4−(2−ヒドロキシエトキシ−2−プロピル)ケトン、1−ヒドロキシシクロヘキシルフェニルケトン、2−メチル−1−〔4−(メチルチオ)フェニル〕−2−モルホリノプロパン−1−などのアセトフェノン系、ベンゾイン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインイソプロピルエーテル、ベンゾインイソブチルエーテル、ベンジルメチルケタールなどのベンゾイン系、ベンゾフェノン、ベンゾイン安息香酸、ベンゾイル安息香酸メチル、4−フェニルベンゾフェノン、ヒドロキシベンゾフェノン、アクリル化ベンゾフェノン、4−ベンゾイル−4´−メチルジフェニルサルファイド、3,3´−ジメチル−4−メトキシベンゾフェノン、3,3´4,4´−テトラ(t−ブチルパーオキシカルボニル)ベンゾフェノンなどのヘンゾフェノン系、チオキサンソン、2−クロルチオキサンソン、2−メチルチオキサンソン、2,4−ジメチルチオキサンソン、イソプロピルチオキサンソン、2,4−ジクロロチオキサンソン、2,4−ジエチルチオキサンソン、2,4−ジイソプロピルチオキサンソン、などのチオキサンソン系などのほか、2,4,6,−トリメチルベンゾイルジフェニルホスフィンオキサイド、メチルフェニルグリオキシレート、ベンジル、9,10−フェナンスレンキノン、カンファーキノン、ジベンスベロン、2−エチルアンスラキノン、4,4”−ジエチルイソフタエロンなど公知の光開始剤をはじめ、紫外線により重合反応を引き起こすものでもよい。
本発明の反射防止材料においては、コーティング膜を構成する成分としてシリカ粒子が用いられる。このシリカ粒子は粒子間の隙間を空気溜りに使うため、単分散で球状が好ましく、またその粒径は膜の反射波形ピーク波長、透明性に影響を与える。平均粒径は50から180nmが好ましく、さらに60から150nmがより好ましく、80~120nmがより一層好ましい。
CV値(%)=[標準偏差/平均粒径]×100
なお、当該シリカ粒子の平均粒径および粒度分布の変動係数CV値は、以下に示す方法に従って測定した値である。
シリカ粒子濃度が1質量%になるように水で希釈した後、シリカ粒子液を電子顕微鏡用試料台に1滴垂らし乾燥させサンプルを作製した。このサンプルを走査型電子顕微鏡にて50,000倍にて観察し、電子顕微鏡画像から画像処理ソフトを用いて得られた画像からシリカ粒子の平均粒径を計算した。
シリカ粒子濃度が1質量%になるように水で希釈した後、シリカ粒子液を電子顕微鏡用試料台に1滴垂らし乾燥させサンプルを作製した。このサンプルを走査型電子顕微鏡にて50,000倍にて観察し、電子顕微鏡画像から画像処理ソフトを用いて得られた画像からシリカ粒子の平均粒径と標準偏差を計算した後、CV値を前記の式によって計算した。
本発明の反射防止フィルムにおけるコーティング膜には、前述したバインダーおよびシリカ粒子と共に、該膜の屈折率を低下させるために、空気溜りが存在することが必要である。
[シミュレーション1]
前記の特許文献1に記載された中空構造のシリカ粒子を透明樹脂マトリックス中に分散させた膜や、特許文献2に記載された空気層を有するシリカ粒子および/または多孔質シリカ粒子を含むコーティング膜は、膜中の空気層が均一に分布しているため、一定の屈折率を有すると考えられる。
シリコンアルコキシドバインダーと平均粒径84nmシリカ粒子(宇部日東化成社製、「ハイプレシカ」、CV値=18%)を質量比5/95で調製した塗料を2層目の粒子数が1層目の粒子数に対して50%となるよう塗布厚を調整すると共に、透光性基材の裏面は黒色化処理するものとして、シミュレーションを行った。
Rmin=0.10%、ピーク波長=564nm(裏面黒色化処理)、ヘーズ値0.7%(基材のみ0.9%)
400nm反射率=0.97%、800nm反射率=0.88%
1層目のみ敷き詰めたときの粒子数762、2層目の粒子数427、(427/762)×100=56(%)
粒子数:走査型電子顕微鏡画像(50,000倍)を画像処理ソフトMac−View、マウンテック社にて計測
なお、実証の結果の反射スペクトル(FILMETRICS社製、分光光度計「F20」で測定)を図3に示すと共に、得られた反射防止材料におけるコーティング膜の走査型電子顕微鏡(JSM−6700F、日本電子社製)の画像を図4に示す。
図5は、基材から、1層目のシリカ粒子および2層目のシリカ粒子の各高さを示す説明図であって、h=3.64r(r=シリカ粒子の半径)、0≦h1<1.64r、1.64r≦h2<2.00r、2.00r≦h3<3.64rの関係を満たす場合、基材からの高さhと各高さにおける断面形状から屈折率を計算すると、屈折率は図6で示すグラフとなり、本構造で屈折率をシミュレーションすると、反射スペクトルは、図7に示すようになる。
なお、各例で得られた反射防止材料は、以下に示す方法に従って評価した。
サンプル裏面に粘着剤付き黒色PETフィルム(くっきりミエール、巴川製紙所社製)をラミネートしサンプルとした。
50mm×50mmに切り出したサンプルを用いて、反射波形を分光光度計(F20、FILMETRICS社製)により測定し、400nmおよび800nmにおける反射率(R)を測定した。
10点 0≦R<0.2
9点 0.2≦R<0.4
8点 0.4≦R<0.6
7点 0.6≦R<0.8
6点 0.8≦R<1.0
5点 1.0≦R<1.2
4点 1.2≦R<1.4
3点 1.4≦R<1.6
2点 1.6≦R<1.8
1点 1.8≦R<2.0
0点 2.0≦R
サンプル裏面に粘着剤付き黒色PETフィルム(くっきりミエール、巴川製紙所社製)をラミネートしサンプルとした。
50mm×50mmに切り出したサンプルを用いて、反射波形を分光光度計(F20、FILMETRICS社製)により測定し、ボトムピークにおける反射率(Rmin)およびその波長(d)を測定した。
10点 0≦Rmin<0.1
9点 0.1≦Rmin<0.2
8点 0.2≦Rmin<0.3
7点 0.3≦Rmin<0.4
6点 0.4≦Rmin<0.5
5点 0.5≦Rmin<0.6
4点 0.6≦Rmin<0.7
3点 0.7≦Rmin<0.8
2点 0.8≦Rmin<0.9
1点 0.9≦Rmin<1.0
0点 1.0≦Rmin、またはピークが複数ある(基材由来の干渉波形(例えばハードコート層付PETフィルム)は除く)、または可視光領域(400~800nm)に存在しない時
10点 550≦d<570
9点 540≦d<550、570≦d<580
8点 530≦d<540、580≦d<590
7点 520≦d<530、590≦d<600
6点 510≦d<520、600≦d<610
5点 500≦d<510、610≦d<620
4点 490≦d<500、620≦d<630
3点 480≦d<490、630≦d<640
2点 470≦d<480、640≦d<650
1点 460≦d<470、650≦d<660
0点 d<460、660≦d、またはピークが複数ある(基材由来の干渉波形(例えばハードコート層付PETフィルム)は除く)、または可視光領域(400~800nm)に存在しない時
50mm×50mmに切り出したサンプルおよび未処理の基材を準備した。
ヘーズメーター(NDH2000、JISK7361−1、日本電色工業社製)を用いて各サンプルのヘーズ値を測定し、以下の式により△Hzを算出した。
△Hz=|サンプルのヘーズ値—基材のヘーズ値|
10点 0≦△Hz<0.2
9点 0.2≦△Hz<0.4
8点 0.4≦△Hz<0.6
7点 0.6≦△Hz<0.8
6点 0.8≦△Hz<1.0
5点 1.0≦△Hz<1.2
4点 1.2≦△Hz<1.4
3点 1.4≦△Hz<1.6
2点 1.6≦△Hz<1.8
1点 1.8≦△Hz<2.0
0点 2.0≦△Hz
各評価点の平均値から総合判定を行った。
◎:8.0≦平均値
○:6.0≦平均値<8.0
△:4.0≦平均値<6.0
×:平均値<4
グリシドキシプロピルトリメトキシシラン317.91gとテトラメトキシシランのオリゴマー「コルコート社製、商品名「メチルシリケート−51」146.66gを、縮合物中の構成単位の質量比が3:1となるようにメタノール242.70gに溶解させ、これに0.1モル/L濃度の硝酸32.43g、水225.64gおよびメタノール34.67gの混合液を滴下したのち、30℃にて24時間反応させて、固形分濃度30質量%のバインダー液[(B)−1成分]を調製した。
メルカプトプロピルトリメトキシシラン289.05gとチタンテトライソプロポキシド222.05gを、縮合物中の構成単位の質量比が3:1となるようにエチレングリコールモノ−t−ブチルエーテル312.45gに溶解させ、これに濃硝酸101.42g、水30.40gおよびエチレングリコールモノ−t−ブチルエーテル44.64gの混合液を滴下したのち、30℃にて4時間反応させて、固形分濃度25質量%のバインダー液[(B)−2成分]を調製した。
グリシドキシプロピルトリメトキシシラン264.93gと75質量%ジルコニウム−n−プロポキシドn−プロパノール溶液220.91gを、縮合物中の構成単位の質量比が3:1となるようにエチレングリコールモノ−t−ブチルエーテル367.07gに溶解させ、これに濃硝酸73.24g、水21.43gおよびエチレングリコールモノ−t−ブチルエーテル52.44gの混合液を滴下したのち、30℃にて4時間反応させて、固形分濃度25質量%のバインダー液[(B)−3成分]を調製した。
メルカプトプロピルトリメトキシシラン289.05gとアルミニウム−n−ブトキシド99.99gを、縮合物中の構成単位の質量比が3:1となるようにエチレングリコールモノ−t−ブチルエーテル352.09gに溶解させ、これに濃硝酸80.71g、水13.57gおよびエチレングリコールモノ−t−ブチルエーテル64.58gの混合液を滴下したのち、30℃にて4時間反応させて、固形分濃度25質量%のバインダー液[(B)−4成分]を調製した。
メタクリル酸メチル25.00gとエチレングリコールモノ−t−ブチルエーテル75.00gを混合して、固形分濃度25質量%のバインダー液[(B)−5成分]を調製した。
トリメチロールプロパントリアクリレート25.00gとエチレングリコールモノ−t−ブチルエーテル75.00gを混合して、固形分濃度25質量%のバインダー液[(B)−6成分]を調製した。
ウレタンアクリレート(日本合成化学工業社製、商品名「UV−7600B」25.00gとエチレングリコールモノ−t−ブチルエーテル75.00gを混合して、固形分濃度25質量%のバインダー液[(B)−7成分]を調製した。
シリカ材料として、ハイプレシカ(宇部日東化成社製)を用いて、水に分散した固形分濃度18質量%のシリカ粒子スラリーS−1~S−8を準備した。シリカ粒子スラリーS−9は、市販の水分散シリカ粒子スラリー(スノーテックス−O、日産化学工業社製、20質量%)に水を添加することで18質量%に調整したものである。表1に一覧を示す。
<平均粒径の測定>
シリカ粒子スラリーを1質量%に水で希釈した後、電子顕微鏡用試料台に1滴垂らし乾燥させサンプルを作製した。走査型電子顕微鏡(JSM−6700F、日本電子社製)にて50,000倍にて観察した。
電子顕微鏡画像から画像処理ソフト(Mac−View、マウンテック社製)を用いて得られた画像からシリカ粒子の平均粒径を計算した。結果を表1に示す。
シリカ粒子スラリーを1質量%に水で希釈した後、電子顕微鏡用試料台に1滴垂らし乾燥させサンプルを作製した。走査型電子顕微鏡(JSM−6700F、日本電子社製)にて50,000倍にて観察した。
電子顕微鏡画像から画像処理ソフト(Mac−View、マウンテック社製)を用いて得られた画像からシリカ粒子の平均粒径と標準偏差を計算した後、CV値を以下の式によって計算した。結果を表1に示す
CV値(%)=(標準偏差/平均粒径)×100
以下の手順で塗工液(P−1~P−21)を調製した。
反射防止材料の作製方法および積層状態の確認方法として、1層目の配列検討を行った。以下の参考例はバーコート法による反射防止材料の作成方法、および積層状態の確認方法であるが、他のコーティング方法による反射防止材料の作成方法、および積層状態の確認方法も同様に行った。
前記「1層目の配列検討」から得られた塗工条件に対して、目的の積層状態となるようバーNo.または濃度を調整することで塗工した。
画像処理ソフト(Mac−View、マウンテック社製)によって得られた1層目、2層目の粒子数から1層目の粒子数に対する2層目の粒子数比率を計算した。
積層状態=(2層目の粒子数/1層目の粒子数)×100
前記「1層目の配列検討」から得られた塗工条件に対して、4積層以上の積層状態となるようバーNo.または濃度を調整することで塗工した。
コロナ処理(50dyne/cm)を行ったA4サイズのシクロオレフィンポリマーフィルム/100μm(以下:COP)(日本ゼオン社製)を用い、コロナ処理面に上記塗工液P−2を2層目の粒子数が1層目の粒子数に対して50%となるようバーコート法で塗布した後、120℃オーブンにて2分間乾燥し、反射防止材料を作製した。得られた反射防止フィルムの評価結果を表4、表5に示す。
塗工液をP−1に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−3に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−4に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
2層目の粒子数が1層目の粒子数に対して25%に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
2層目の粒子数が1層目の粒子数に対して75%に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−5に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−6に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−7に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−8に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−9に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−10に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−11に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例14
塗工液をP−12、乾燥温度を80℃に替え、乾燥後に紫外線照射(高圧水銀ランプ、500mJ/cm2)を行った以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例15
塗工液をP−13に替えた以外は実施例14と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例16
塗工液をP−14に替えた以外は実施例14と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
基材をコロナ処理(50dyne/cm)したPETフィルム(以下:PET)(東洋紡社製、コスモシャインA4100/100μm、塗工面=PET面)に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
基材をコロナ処理(50dyne/cm)したハードコート層付きPETフィルム(以下:HC付PET)(基材:東レ社製、ルミラーT60/125μm、HC材料:紫外線硬化樹脂(日本合成化学社製、紫光UV−1700B)、光重合開始剤(長瀬産業社製、ダロキュア1173)、硬化後厚み10μm)のHC面に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例19
基材をコロナ処理(50dyne/cm)した無色透明アクリル板(三菱レーヨン社製、アクリライトL、2mm厚)に、コーティング方法をディップコート法に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例20
基材を脱脂処理(ユーアイ化成製、ホワイト7−AL)したガラス板(松浪硝子工業製、S9213)に替えた以外は実施例19と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−15に替えた以外は実施例1と同様の操作を実施した。塗工液P−15はシリカ粒子が固定されず、参考例1の方法で1層敷き詰める条件、およびその粒子数を決定することができなかったため、塗工液P−2と同じとして条件を決定した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−16に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
2層目の粒子数が1層目の粒子数に対して10%に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
2層目の粒子数が1層目の粒子数に対して90%に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−18に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−19に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−20に替えた以外は実施例1と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−17に替えた以外は実施例1と同様の操作を実施した。塗工液P−17はシリカ粒子が凝集し、参考例1の方法で1層敷き詰める条件、およびその粒子数を決定することができなかったため、塗工液P−2と同じとして条件を決定した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例1の塗工液を用いて積層状態が4層となるよう操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−21に替えた以外は比較例3と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
実施例1の塗工液を用いて積層状態が1層となるよう操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−7に替えた以外は比較例5と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
塗工液をP−8に替えた以外は比較例5と同様の操作を実施した。得られた反射防止材料の評価結果を表4、表5に示す。
Claims (9)
- 透光性を有する基材表面の少なくとも一部に設けてなるバインダー、シリカ粒子、空気溜りからなるコーティング膜であって、前記シリカ粒子は基材表面から2層で配列しており、基材側である1層目は粒子が敷き詰められていると共に、前記基材と前記シリカ粒子間に前記空気溜りを有しており、かつ2層目のシリカ粒子は前記1層目のシリカ粒子の一部を覆っていると共に、前記1層目のシリカ粒子と前記2層目のシリカ粒子間に前記空気溜りを有していることを特徴とする反射防止材料。
- コーティング膜において、バインダー/シリカ粒子の比率が質量比で1/99~20/80であり、かつ2層目のシリカ粒子数は、1層目のシリカ粒子数に対して10~90%の存在比率で配列してなる請求項1に記載の反射防止材料。
- 基材から1層目粒子の上端までの距離H1と、前記基材から2層目粒子の上端までの距離H2が下記式(2)を満たす請求項1または2に記載の反射防止材料。
1.5≦H2/H1≦2.1…(2) - シリカ粒子の平均粒径が50~180nmであると共に、その粒度分布の変動係数CV値が35%以下である請求項1~3のいずれか1項に記載の反射防止材料。
- バインダーが、重合性官能基を有する化合物である請求項1~4のいずれか1項に記載の反射防止材料。
- 前項記載のバインダーが、アクリロイル基またはメタクリロイル基、ビニル基からなる群から選ばれる重合性官能基を少なくとも1つ有する化合物である請求項1~5のいずれか1項に記載の反射防止材料。
- バインダーが、下記一般式(3)
(R1)nM(OR2)m−n…(3)
(式中、R1は非加水分解性基、R2は炭素数1~6のアルキル基、Mはケイ素、チタン、ジルコニウムおよびアルミニウムの中から選ばれる金属原子を示し、mは金属原子Mの価数で、3または4であり、nは、mが4の場合は0~2の整数、mが3の場合は0~1の整数である。)で表されるアルコキシド化合物を、加水分解−縮合反応して得られたM−Oの繰り返し単位を主骨格とする縮合物である請求項1~4のいずれか1項に記載の反射防止材料。 - 基材の裏面を黒色化した場合の反射波形において、400nmおよび800nmにおける反射率が、それぞれ3.5%以下であって、反射率の最小値が0.8%以下であり、かつそのピーク位置が460~720nmの領域にある請求項1~5のいずれか1項に記載の反射防止材料。
- ヘーズ値が、下記式(4)を満たす請求項1~6のいずれか1項に記載の反射防止材料。
|反射防止フィルムのヘーズ値−透光性を有する基材のヘーズ値|≦1.5…(4)
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- 2011-12-12 WO PCT/JP2011/079268 patent/WO2012086560A1/ja active Application Filing
- 2011-12-12 US US13/997,055 patent/US20130321924A1/en not_active Abandoned
- 2011-12-12 CN CN2011800623492A patent/CN103339534A/zh active Pending
- 2011-12-22 TW TW100148056A patent/TW201231596A/zh unknown
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Also Published As
Publication number | Publication date |
---|---|
JP5913133B2 (ja) | 2016-04-27 |
JPWO2012086560A1 (ja) | 2014-05-22 |
KR20130140030A (ko) | 2013-12-23 |
US20130321924A1 (en) | 2013-12-05 |
CN103339534A (zh) | 2013-10-02 |
TW201231596A (en) | 2012-08-01 |
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