WO2013180509A1 - 하드코팅 필름 - Google Patents
하드코팅 필름 Download PDFInfo
- Publication number
- WO2013180509A1 WO2013180509A1 PCT/KR2013/004804 KR2013004804W WO2013180509A1 WO 2013180509 A1 WO2013180509 A1 WO 2013180509A1 KR 2013004804 W KR2013004804 W KR 2013004804W WO 2013180509 A1 WO2013180509 A1 WO 2013180509A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hard coating
- film
- coating film
- hard
- layer
- Prior art date
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/103—Esters of polyhydric alcohols or polyhydric phenols of trialcohols, e.g. trimethylolpropane tri(meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08J5/18—Manufacture of films or sheets
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- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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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
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- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31928—Ester, halide or nitrile of addition polymer
Definitions
- the present invention relates to a hard coat film. More specifically, the present invention relates to a hard coat film exhibiting high hardness and excellent properties.
- Glass or tempered glass is generally used as a material having excellent mechanical properties in the display window or the front plate of the mobile device.
- the glass causes the mobile device to be heavier due to its own weight and there is a problem of breakage due to external impact.
- Plastic resin is being researched as a substitute material for glass.
- Plastic resin films are lightweight and less prone to break, making them suitable for the trend toward lighter mobile devices.
- films have been proposed for coating a hard coat layer on a support substrate in order to achieve films with high hardness and wear resistance properties.
- a method of increasing the thickness of the hard coating layer may be considered.
- the surface hardness may be increased, but wrinkles or curls may be caused by hardening shrinkage of the hard coat layer. It is not easy to apply it practically because it becomes large and cracks or peeling of a hard-coating pad tends to occur easily.
- Korean Unexamined Patent Publication No. 2010-0041992 discloses a hard coating film composition excluding a monomer and using a binder resin including an ultraviolet curable polyurethane acrylate-based oligomer.
- the hard coat film disclosed above is not strong enough to replace the glass panel of the display with a pencil hardness of about 3H.
- the present invention provides a hard coating film exhibiting high hardness but no curling, warping or cracking. [Measures of problem]
- a hard coating layer formed on at least one surface of the support substrate, wherein the hard coating layer is a photocurable crosslinked copolymer of a 3 to 6 functional acrylate monomer and an inorganic dispersed in the photocurable crosslinked copolymer. It provides a hard coat film containing fine particles.
- the hard coating film of the present invention exhibits high hardness, scratch resistance, high transparency, and has excellent curling properties and less curl or crack, and thus can be usefully applied to mobile devices, display devices, front panels of various instrument panels, display units, and the like.
- the hard coating layer includes a photocurable crosslinked copolymer of a 3 to 6 functional acrylate monomer, and inorganic fine particles dispersed in the photocurable crosslinked copolymer.
- first and second are used to describe various components, and the terms are used only for the purpose of distinguishing one component from other components.
- each component when each component is referred to as being formed “on” or “on” of each component, it means that each component is directly formed on each component, or other components are each It can be formed additionally between the layer, the object, the substrate.
- Hard coating film according to an embodiment of the present invention the support substrate; And a hard coating layer formed on at least one surface of the support substrate, wherein the hard coating layer is dispersed in the photocurable crosslinked copolymer of a 3 to 6 functional acrylate monomer and the photocurable crosslinked copolymer. Inorganic fine particles are included.
- the support substrate on which the hard coat layer is formed may be used without particular limitation as long as it is a transparent plastic resin that is commonly used.
- polyester such as polyethylene terephthalate (PET), cyclic olefin copolymer (cyclic olefin copolymer, COC), polyacrylate (polyacrylate, PAC) , Polycarbonate (PC), polyethylene (PE), polymethylmethacrylate (PMMA), polyetheretherketon (PEEK), polyethylenenaphthalate (PEN), polyetherimide ( polyetherimide (PEI), polyimide (PI), triacetylcellulose (TAC) or MMA (methyl methacrylate).
- PET polyethylene terephthalate
- cyclic olefin copolymer cyclic olefin copolymer, COC
- polyacrylate polyacrylate
- PAC Polycarbonate
- PC polyethylene
- PMMA polymethylmethacrylate
- PEEK polyetheretherketon
- PEN polyethylenenaphthalate
- PEI polyetherimide
- PI polyimide
- TAC triacetylcellulose
- MMA
- the supporting substrate is a multilayer structure of polyethylene terephthalate (PET), a structure of two or more layers formed by coextrusion of polymethyl methacrylate (PMMA) / polycarbonate (PC) It can be a substrate.
- PET polyethylene terephthalate
- PMMA polymethyl methacrylate
- PC polycarbonate
- the support substrate may be a substrate including a copolymer of polymethyl methacrylate (PMMA) and polycarbonate (PC).
- PMMA polymethyl methacrylate
- PC polycarbonate
- the thickness of the support substrate is not particularly limited, but a support substrate having a thickness of about 30 to about 1,200, or about 50 to about 800 may be used.
- the hard coat film of the present invention is formed on at least one surface of the support substrate.
- the ratio of the thickness of the support substrate and the hard coating layer may be about 1: 0.5 to about 1: 2, or about 1: 0.5 to about 1: 1.5.
- the ratio of the thicknesses of the supporting substrate and the hard coating layer is in the above range, It is possible to form a hard coat film exhibiting high hardness while generating less curls or cracks.
- the hard coat layer includes a photocurable crosslinked copolymer of 3 to 6 functional acrylate monomers, and inorganic particles dispersed in the photocurable crosslinked copolymer.
- the acrylate-based means not only acrylate but also methacrylate, or a derivative in which a substituent is introduced into acrylate or methacrylate.
- the 3 to 6 functional acrylate monomers include trimethylolpropane triacrylate (TMPTA), trimethyl propaneethoxy triacrylate (TMPEOTA), glycerin propoxylated triacrylate (GPTA), and pentaerythritol. Tetraacrylate (PETA) or dipentaerythrane can be mentioned nuxaacrylate (DPHA).
- TMPTA trimethylolpropane triacrylate
- TMPEOTA trimethyl propaneethoxy triacrylate
- GPTA glycerin propoxylated triacrylate
- PETA trimethylolpropane triacrylate
- GPTA glycerin propoxylated triacrylate
- DPHA nuxaacrylate
- the 3 to 6 functional acrylate monomers may be used alone or in combination with each other.
- the photocurable cross-linked co-polymer may be a cross-linked copolymer in which the 3 to 6 functional acrylate-based monomers are cross-polymerized with each other.
- the photocurable crosslinked copolymer may be a crosslinked copolymer in which 1 to 2 functional acrylate monomers are cross-polymerized in addition to the 3 to 6 functional acrylate monomers.
- the 1 to 2 functional acrylate monomers are, for example, hydroxyethyl acrylate (HEA), hydroxyethyl methacrylate (HEMA), nucleic acid diol diacrylate (HDDA), or tripropylene glycol diacrylate ( TPGDA), ethylene glycol diacrylate (EGDA), and the like.
- the 1 to 2 functional acrylate monomers may also be used alone or in combination with each other.
- the photocurable crosslinked copolymer is a crosslinked copolymer in which a 1 to 2 functional acrylate monomer and a 3 to 6 functional acrylate monomer are crosslinked, the 1 to 2 functional acrylate monomer and the 3
- the content ratio of the 6 to 6 functional acrylate monomer is not particularly limited, but according to one embodiment of the present invention, the 1 to 2 functional acrylate monomer and the 3 to 6 functional acrylate monomer are about 1:99 to about 50:50, or about 10:90 to about 50:50, or about 20:80 to about 40:60.
- the 1 to 2 functional acrylate monomer and 3 to 6 functional acrylate monomer in the weight ratio it is possible to impart high hardness and flexibility without deterioration of other physical properties such as curl properties and light resistance.
- the hard coating layer includes inorganic fine particles dispersed in the photocurable crosslinked copolymer.
- the inorganic fine particles having a nanoscale particle size for example, nanoparticles having a particle diameter of about 100 nm or less, or about 10 to about 100 nm, or about 10 to about 50 nm Particles can be used.
- the inorganic fine particles for example, silica fine particles, aluminum oxide particles, titanium oxide particles, zinc oxide particles, or the like can be used.
- the inorganic fine particles By including the inorganic fine particles, it is possible to further improve the hardness of the hard coat film.
- the hard coating layer includes about 40 to about 90 parts by weight of the photocurable crosslinked copolymer and about 10 to about 60 parts by weight of inorganic fine particles, based on 100 parts by weight of the total hard coating layer. Or, from about 50 to about 80 parts by weight of the photocurable crosslinked copolymer and about 20 to about 50 parts by weight of the inorganic particulates.
- the photocurable crosslinked copolymer and the inorganic fine particles in the above range can be formed a hard coating film of excellent physical properties.
- the thickness of the hard coating layer, the other side closer to the surface than one side closer to the support substrate can be distributed in larger amounts in the hard coat layer.
- the hard coating layer of the present invention in addition to the photocurable crosslinked copolymer and the inorganic fine particles described above, surfactants, anti-yellowing agents, leveling agents, antifouling agents, etc. It may further include an additive commonly used in the art to which the invention belongs.
- the content can be variously adjusted within a range that does not lower the physical properties of the hard coating film of the present invention, it is not particularly limited, for example, based on 100 parts by weight of the photocurable crosslinked copolymer, about 1 to 1 About 10 parts by weight.
- the hard coating layer may include a surfactant as an additive, and the surfactant may be a 1 to 2 functional fluorine acrylate, a fluorine surfactant or a silicone surfactant. Can be.
- the surfactant may be included in the form of being dispersed or crosslinked in the crosslinked copolymer.
- a yellowing inhibitor may be included as the additive, and as the additive yellowing inhibitor, a benzophenone compound or a benzotriazole compound may be mentioned.
- the hard coating layer may be formed by photocuring a hard coating composition including a binder monomer, an inorganic fine particle, a photoinitiator, and optionally an additive including the 3 to 6 functional acrylate monomer.
- photoinitiator examples include 1-hydroxycyclohexyl-phenyl ketone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, 2-hydroxy-1- [4- (2-hydroxy Phenyl] -2-methyl-1-propanone, methylbenzoylformate, ⁇ , ⁇ -dimethoxy- ⁇ -phenylacetophenone, 2-benzoyl-2- (dimethylamino) -1- [ 4- (4-morpholinyl) phenyl] -1-butanone, 2-methyl-1- [4- (methylthio) phenyl] -2- (4-morpholinyl) -1-propanone diphenyl (2,4,6-trimethylbenzoyl) -phosphine oxide, or bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and the like, but are not limited thereto.
- the hard coating layer of the present invention may be formed by applying in a form that optionally further comprises an organic solvent in order to control the viscosity and fluidity of the hard coating composition and increase the applicability of the hard coating composition to the support substrate. Can be.
- organic solvent examples include methane, ethanol, isopropyl alcohol, alcohol solvents such as butanol, 2-methoxyethanol, 2-ethoxytan, alkoxy alcohol solvents such as 1-methoxy-2-propanol, acetone Ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, methyl propyl ketone, cyclonucleone propylene glycol monopropyl ether, propylene glycol monomethyl ether ethylene glycol monoethyl ether ethylene glycol monopropyl ether ethylene glycol monobutyl ether diethylene glycol Monomethyl ether : diethyl glycol monoethyl ether : diethyl glycol monopropyl ether.
- Ether solvents such as diethyl glycol monobutyl ether, diethylene glycol-2-ethyl nucleosil ether, aromatic solvents such as benzene, toluene, xylene, and the like can be used alone or in combination.
- the organic solvent is further applied to the hard coating composition, wherein the organic solvent is used for the binder monomer : solid particles including the inorganic fine particles, the photoinitiator and other additives.
- the solid content: the organic solvent may include a weight ratio of about 70:30 to about 99: 1.
- the hard coating film comprising the above-described components is applied on at least one side of the support substrate and then photocured to form a hard coat filling to obtain the hard coating film of the present invention.
- the hardcoat layer has a thickness of about 50 or more, for example about 50 to about 150 urn, or about 70 to about 100 after fully cured. According to the present invention, it is possible to provide a hard coating film having a high hardness without including the curl or crack generation, but included as a hard coating layer having the thickness as described above.
- the hard coating layer may be formed only on one surface of the support substrate.
- the hard coating layer may be formed on both sides of the support substrate.
- the hard coating film of the present invention is a plastic resin film, an adhesive film, a release film, a conductive film, a conductive layer, a coating layer, a cured resin layer, a non-conductive film on at least one surface of the hard coating layer , Metal mesh layer or It may further include one or more layers, films, films, and the like, such as a patterned metal layer.
- the layer, film, film or the like may be in any form of a single layer, a double layer or a laminated type.
- the layer, film, or film may be laminated on the hard coating layer by laminating a freestanding film using an adhesive or an adhesive film, or by coating, vapor deposition, sputtering, or the like. The invention is not limited thereto.
- the hard coating composition may be sequentially applied to the front and rear surfaces of the supporting substrate, or simultaneously applied to both sides of the supporting substrate.
- the hard coating layer When the hard coating layer is formed on both sides of the supporting substrate, it may be formed in the following manner.
- the first hard coating composition is first coated and first photocured on one surface of the support substrate, and then the second hard coating composition is again applied on the other surface of the support substrate, that is, the back surface. It can be formed by a two-step process of coating and second photocuring. At this time, the first and the second hard coating composition is the same as the above-described hard coating composition, it is to distinguish the composition applied only on one side and the back, respectively.
- the curl that may be caused by curing shrinkage in the first photocuring step is canceled in the opposite direction to obtain a flat hard coating film. can do. Therefore, no additional planarization process is necessary.
- the hard coating film when exposed to a flat surface after 70 hours or more at a temperature of 50 ° C or more and 80% humidity or more, at each corner or one side of the hard coating film plane
- the maximum distance of the distance may be about 1.0 mm or less, or about 0.6 mm or less, or about 0.3 mm or less. More specifically, when placed in a plane after exposure for 70 to 100 hours at a temperature of 50 to 90 ° C and a humidity of 80 to 90%, the maximum of the distance of each corner or one side of the hard-coating film spaced in the plane
- the value may be about 1.0 mm or less, or about 0.6 mm or less, or about 0 mm or less. have.
- the hard coat film of the present invention exhibits excellent high hardness, scratch resistance, high transparency, durability, light resistance, light transmission, and the like, and can be usefully used in various fields.
- the hard coat film of the present invention the pencil hardness at 1kg load
- the hard coat film of the present invention may have a light transmittance of 91.0% or more, or 92.0% or more, and a haze of 1.0% or less, or 0.5% or less, or 0.4% or less.
- the hard coating film of the present invention may have an initial color b value of 1.0 or less.
- the difference between the initial color b value and the color b value after exposure to the ultraviolet lamp in the UVB wavelength region for 72 hours or more may be 0.5 or less, or 0.4 or less.
- Such a hard coating film of the present invention can be utilized in various fields.
- the present invention may be used for a touch panel of a mobile communication terminal, a smartphone or a tablet PC, and a cover substrate or an element substrate of various displays.
- the operation and effects of the invention will be described in more detail with reference to specific embodiments of the invention. However, such embodiments are only to be presented as an example of the invention, whereby the scope of the invention is not determined.
- HOA hydroxyethyl acrylate
- DPHA dipentaerythri
- FC4430 fluorine-based surfactant
- PET support having a thickness of 15 cm X 20 cm and a thickness of 188 / m of the first hard coating composition It was applied onto the substrate.
- the first photocuring was carried out by irradiating ultraviolet rays of 280-350nm wavelength using a black light fluorescent lamp.
- the second hard coating composition was coated on the back side of the supporting substrate.
- a second photocuring was performed by irradiating ultraviolet rays of 280-350nm wavelength using a black light fluorescent lamp to prepare a hard coat film.
- the hard coat layers formed on both sides of the resin were each 100 / mm 3.
- a hard coat film was prepared in the same manner as in Example 1 except that 2 g of 9-ethylene glycol diacrylate (9-EGDA) was used instead of 2 g of hydroxyethyl acrylate (HEA).
- 9-EGDA 9-ethylene glycol diacrylate
- HOA hydroxyethyl acrylate
- hydroxyethyl acrylate (HEA) instead of 2 g of hydroxyethyl acrylate (HEA) and 8 g of dipentaerythrone nucleoacrylate (DPHA) complex, hydroxyethyl acrylate (HEA) lg and about 50% by weight of nano silica having a particle diameter of 20-30 nm are dispersed.
- a hard coat film was prepared in the same manner as in Example 1 except for using 9 g of trimethylolpropane triacrylate (TMPTA) composite (4.5 g of silica and 4.5 g of TMPTA).
- TMPTA trimethylolpropane triacrylate
- Hydroxyethyl acrylate (HEA) 2g, 20-30nm particle size of nano silica is about 40 wt 0/0
- DPHA hex acrylate
- FC4430 benzotriazole-based yellowing inhibitor
- Example 5 As a support substrate, it was applied on a PC / PMMA coextrusion support substrate having a thickness of 15 cm X 20 cm, 180. The subsequent process was to produce a hard coat film in the same manner as in Example 1.
- Example 5 As a support substrate, it was applied on a PC / PMMA coextrusion support substrate having a thickness of 15 cm X 20 cm, 180. The subsequent process was to produce a hard coat film in the same manner as in Example 1.
- Example 5 Example 5
- a hard coat film was prepared in the same manner as in Example 1, except that TAC resin having a thickness of 15 cm ⁇ 20 cm and a thickness of 80 was used as the supporting substrate. Comparative Example 1
- nucleoacrylate (DPHA) complex dipentaeryri was used in the same manner as in Example 1 except that only 10 g of nupentacrylate (DPHA) was used. A film was prepared. . Comparative Examples 2 to 3
- a hard coat film was prepared in the same manner as in Example 1 except that the components of the first and second hard coat compositions were different as shown in Table 1 below.
- the main components and the supporting substrate are summarized in Table 1 below.
- the hardness of the groovelessness was confirmed after reciprocating three times with a load of 1.0 kg according to the measurement standard JIS K5400 using a pencil hardness tester.
- the number of grooves was evaluated after reciprocating 400 times with a load of 0.5 kg. O for 2 or less grooves, ⁇ for 2 or more grooves and less than 5 grooves, and X for 5 or more grooves.
- Spectrophotometer Transmittance and haze were measured using a £ meter (device name: COH-400).
- Each hard coating film was wound in a cylindrical mandrel having a diameter of 3 cm, and then cracks were judged to determine whether or not cracks occurred, and the cracks were evaluated as X. 7) Layer resistance
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Abstract
Description
Claims
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JP2015514910A JP6155329B2 (ja) | 2012-05-31 | 2013-05-31 | ハードコーティングフィルム |
US14/404,110 US10294387B2 (en) | 2012-05-31 | 2013-05-31 | Hard coating film |
CN201380039332.4A CN104487497B (zh) | 2012-05-31 | 2013-05-31 | 硬涂膜 |
EP13797572.8A EP2840109A4 (en) | 2012-05-31 | 2013-05-31 | HART COATING FILM |
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KR1020130062124A KR101436617B1 (ko) | 2012-05-31 | 2013-05-30 | 하드코팅 필름 |
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PCT/KR2013/004807 WO2013180511A1 (ko) | 2012-05-31 | 2013-05-31 | 하드코팅 필름의 제조방법 |
PCT/KR2013/004809 WO2013180512A1 (ko) | 2012-05-31 | 2013-05-31 | 하드코팅 조성물 |
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PCT/KR2013/004807 WO2013180511A1 (ko) | 2012-05-31 | 2013-05-31 | 하드코팅 필름의 제조방법 |
PCT/KR2013/004809 WO2013180512A1 (ko) | 2012-05-31 | 2013-05-31 | 하드코팅 조성물 |
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JP (4) | JP6155329B2 (ko) |
KR (4) | KR101436617B1 (ko) |
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