WO2014081119A1 - 하드코팅층을 포함하는 광특성이 우수한 반사방지 필름 - Google Patents
하드코팅층을 포함하는 광특성이 우수한 반사방지 필름 Download PDFInfo
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- WO2014081119A1 WO2014081119A1 PCT/KR2013/009123 KR2013009123W WO2014081119A1 WO 2014081119 A1 WO2014081119 A1 WO 2014081119A1 KR 2013009123 W KR2013009123 W KR 2013009123W WO 2014081119 A1 WO2014081119 A1 WO 2014081119A1
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- reflection film
- refractive index
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Classifications
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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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/02—Physical, chemical or physicochemical properties
-
- 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
-
- G02B1/105—
-
- 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
- G02B1/14—Protective coatings, e.g. hard coatings
-
- 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
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/102—Oxide or hydroxide
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
-
- 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
- B32B2383/00—Polysiloxanes
Definitions
- an antireflection film having excellent optical properties including a hard coat layer.
- the image produced inside the display by the reflected light does not become vividly formed in the eye, resulting in a low contrast, which makes the screen difficult to see and the eyes feel tired. Or headaches. For this reason, the demand for antireflection is also very strong.
- antireflection films having a high refractive index layer and a low refractive index layer have been developed in order to find a film structure having an antireflection effect in the visible light region, and research on reducing the number of layers is continuously conducted. come.
- the antireflection film has been developed in a form in which a low refractive index layer is coated on the high refractive index layer, but there is still a difficulty in designing an antireflection film including a low refractive index layer and a high refractive index layer.
- One embodiment of the present invention by using a hard coating layer, a high refractive index layer and a low refractive index layer to provide an excellent anti-reflection effect, and provides an anti-reflection film with individualized strength and optical properties.
- a transparent substrate, a hard coating layer, a high refractive index layer and a low refractive layer of laminated structure is a silane compound represented by the formula (1) and the organosilane compound represented by the formula (2) A binder formed by polymerization; And it provides an anti-reflection film comprising hollow silica particles.
- R 1 is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms or an alkenyl group having 3 to 10 carbon atoms
- R 2 is an alkyl group having 1 to 6 carbon atoms
- x is 0 ⁇ x ⁇ 4. Represents an integer.
- R 3 is a fluoroalkyl group having 1 to 12 carbon atoms
- R 4 is an alkyl group having 1 to 6 carbon atoms
- y represents an integer of 0 ⁇ x ⁇ 4.
- the silane compound represented by the formula (1) is tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, tetra-n-butoxysilane, tetra-sec-butoxysilane, tetra-tert- Butoxysilane, trimethoxysilane, triethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, Isobutyltriethoxysilane, cyclohexyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, allyltrime
- the organosilane compound represented by the formula (2) is trifluoromethyltrimethoxysilane, trifluoromethyltriethoxysilane, trifluoropropyltrimethoxysilane, trifluoropropyltriethoxysilane, nonafluorobutylethyl Trimethoxysilane, nonafluorobutylethyltriethoxysilane, nonafluorohexyltrimethoxysilane, nonafluorohexyltriethoxysilane, tridecafluorooctyltrimethoxysilane, tridecafluorooctyltrie Methoxysilane, heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, and combinations thereof.
- the hollow silica particles may have a number average diameter of about 1 nm to about 1,000 nm.
- the binder may include about 10 parts by weight to about 120 parts by weight based on 100 parts by weight of the hollow silica particles.
- the refractive index of the hard coat layer may be about 1.5 to about 1.6.
- the hard coating layer may have a thickness of about 50 nm to about 200 nm.
- the hard coating layer may include inorganic nanoparticles, ultraviolet curable resin, a curing initiator and a solvent.
- the refractive index of the low refractive layer may be about 1.2 to about 1.25.
- the refractive index of the high refractive layer may be about 1.6 to about 1.7.
- the pencil hardness of the anti-reflection film may be about B to about H.
- the contact angle of the antireflection film with respect to water may be about 70 ° or less.
- the reflectivity of the anti-reflection film may be less than 0.5% in the wavelength region of about 380nm to about 780nm.
- the color a * value and the color b * value of the reflected light may be ⁇ 1 ⁇ a * ⁇ 2 and ⁇ 1 ⁇ b * ⁇ 1.
- the antireflective film may have excellent strength and improved optical properties.
- the anti-reflection film is excellent in the anti-reflection effect can be applied to various display devices such as a touch film.
- FIG. 1 is a schematic view showing an antireflection film of an embodiment of the present invention.
- FIG. 2 is a graph showing the antireflection film reflectance according to the wavelength region of the embodiment.
- 3 is a graph showing the antireflection film reflectance according to the wavelength region of the comparative example.
- a transparent substrate, a hard coating layer, a high refractive index layer and a low refractive layer of laminated structure is a silane compound represented by the formula (1) and the organosilane compound represented by the formula (2) A binder formed by polymerization; And it provides an anti-reflection film comprising hollow silica particles.
- R 1 is an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms or an alkenyl group having 3 to 10 carbon atoms
- R 2 is an alkyl group having 1 to 6 carbon atoms
- x is 0 ⁇ x ⁇ 4. Represents an integer.
- R 3 is a fluoroalkyl group having 1 to 12 carbon atoms
- R 4 is an alkyl group having 1 to 6 carbon atoms
- y represents an integer of 0 ⁇ x ⁇ 4.
- the silane compound represented by Formula 1 is a tetrafunctional alkoxy silane having four alkoxy groups when x is 0, a trifunctional alkoxy silane having three alkoxy groups when x is 1 and two alkoxy when x is 2 It can be represented by a bifunctional alkoxy silane having a group.
- x 3
- an aryl group having 6 to 10 carbon atoms includes a phenyl group or a tolyl group
- the alkenyl group having 3 to 10 carbon atoms includes an allyl group, 1-propenyl group, 1-butenyl group, 2-butenyl group, or 3- Butenyl groups and the like.
- silane compound examples include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, tetra-n-butoxysilane, tetra-sec-butoxysilane, tetra-tert-butoxysilane, Trimethoxysilane, triethoxysilane, methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, propyltrimethoxysilane, propyltriethoxysilane, isobutyltriethoxy Silane, cyclohexyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, allyltrimethoxysilane
- the organosilane compound represented by the formula (2) is trifluoromethyltrimethoxysilane, trifluoromethyltriethoxysilane, trifluoropropyltrimethoxysilane, trifluoropropyltriethoxysilane, nonnafluorobutyl Ethyltrimethoxysilane, nonafluorobutylethyltriethoxysilane, nonafluorohexyltrimethoxysilane, nonafluorohexyltriethoxysilane, tridecafluorooctyltrimethoxysilane, tridecafluorooctyl
- One or more compounds selected from the group consisting of liethoxysilane, heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltriethoxysilane, and combinations thereof may be used, but are not limited thereto. Is advantageous in that
- the silane compound represented by Formula 1 and the organosilane compound represented by Formula 2 are hydrolyzed and dehydrated condensation polymerized to form a siloxane compound.
- an acid catalyst may be used for the hydrolysis and dehydration condensation reaction, and more specifically nitric acid, hydrochloric acid, sulfuric acid, or acetic acid may be used.
- the organosilane compound represented by Formula 2 may be used in an amount of about 0.1 part by weight to about 50 parts by weight based on 100 parts by weight of the silane compound represented by Formula 1, and specifically about 1 part by weight to about 30 parts by weight. Parts, more specifically about 5 parts by weight to about 20 parts by weight are preferably used.
- the organosilane compound is used in less than about 0.1 parts by weight, there is a problem in that the refractive index lowering effect is insignificant, and when used in excess of about 50 parts by weight, there is a problem in that the refractive index is increased.
- the formed siloxane compound serves as an organic-inorganic hybrid binder to serve to treat the surface of the hollow silica particles.
- the weight average molecular weight of the siloxane compound is preferably in the range of about 1,000 to about 100,000, specifically about 2,000 to about 50,000, more preferably about 5,000 to about 20,000.
- the weight average molecular weight is less than about 1,000, it is difficult to form a coating layer having a desired low refractive index, and when the weight average molecular weight exceeds about 100,000, there is a problem of lowering the light transmittance of the antireflection film.
- hollow silica particles are silica particles derived from a silicon compound or an organosilicon compound, and mean particles having a void space on the surface and / or inside of the silica particles.
- the hollow silica particles may be included in a colloidal phase having a solid content of about 5% by weight to about 40% by weight in the form of a dispersion in a dispersion medium (water or an organic solvent).
- the organic solvent usable as the dispersion medium may include alcohols such as methanol, isopropyl alcohol (IPA), ethylene glycol, butanol, etc .; Ketones such as methyl ethyl ketone and methyl iso butyl ketone (MIBK); Aromatic carbon hydrogens such as toluene and xylene; Amides such as dimethyl formamide, dimethyl acetamide and N-methyl pyrrolidone; Esters such as ethyl acetate, butyl acetate and ⁇ -butyrolactone; Ethers such as tetrahydrofuran and 1,4-dioxane; Or mixtures thereof.
- alcohols such as methanol, isopropyl alcohol (IPA), ethylene
- the number average diameter of the hollow silica particles is in the range of about 1nm to about 1,000nm, specifically about 5nm to about 500nm, more specifically about 10nm to about 100nm to use the antireflection while maintaining the transparency of the film It is advantageous to show the effect.
- the binder of the siloxane compound is about 10 parts by weight to about 120 parts by weight, specifically about 20 parts by weight to about 100 parts by weight, and more specifically about 40 parts by weight to about 80 parts by weight based on 100 parts by weight of the hollow silica particles. It is better to use additional. If the binder is used in less than about 10 parts by weight, there is a problem that whitening phenomenon occurs in the coating surface, when used in excess of about 120 parts by weight there is a problem that the antireflection effect is significantly reduced.
- the anti-reflective coating composition may include an acid catalyst to promote the surface treatment of the hollow silica particles by the binder, and the acid catalyst is not particularly limited as long as it is generally used in the art, but using nitric acid or hydrochloric acid It is good.
- the acid catalyst may be used in an amount of about 0.1 parts by weight to about 20 parts by weight based on 100 parts by weight of the hollow silica particles.
- the pH of the coating composition with the acid catalyst is advantageously adjusted in the range of about 2 to about 4.
- the anti-reflection film 100 may include a transparent substrate 10, a hard coating layer 20, a high refractive layer 30, and a low refractive layer 40.
- the transparent substrate 10 may be a variety of substrates used in a typical liquid crystal display device such as a transparent polymer resin, but as the substrate, polyethylene terephthalate (PET), polyethylenenaphthalate (PEN), polyethersulfone (PES), PC (Poly) carbonate), polypropylene (PP), norbornene-based resin, and the like may be used.
- PET polyethylene terephthalate
- PEN polyethylenenaphthalate
- PES polyethersulfone
- PC PC
- PP polypropylene
- norbornene-based resin and the like
- the thickness of the PET film may be about 10 ⁇ m to about 200 ⁇ m, and specifically about 20 ⁇ m to about 100 ⁇ m. If the thickness of the transparent base material is less than about 10 mu m, there is a problem in the mechanical strength of the base material. If the thickness exceeds about 200 mu m, there is a case where improvement of the spot characteristic for the touch panel is not achieved.
- the antireflection film 100 may include a hard coating layer in addition to the low refractive layer and the high refractive layer.
- a hard coating layer in addition to the low refractive layer and the high refractive layer.
- the hard coating layer 20 may have a thickness of about 50 nm to about 200 nm.
- the hard coating layer may be formed on the transparent substrate, and to ensure the strength of the anti-reflection film in relation to the high refractive index layer and the low refractive index layer, compared with the anti-reflection layer that does not include the hard coating layer.
- Optical properties can be secured in a wide wavelength range, and surface hardness can be improved.
- by maintaining the thickness of the hard coating layer it can prevent the occurrence of turbidity.
- the refractive index of the hard coat layer 20 may be about 1.5 to about 1.6.
- the refractive index of the hard coating layer may be smaller than the high refractive index layer refractive index, and larger than the low refractive index layer refractive index.
- the hard coating layer 20 may include inorganic nanoparticles, ultraviolet curable resin, a curing initiator and a solvent.
- the inorganic nanoparticles may be those that are surface treated with an acrylate compound relative to the particle surface area. When using the inorganic nanoparticles within the above range, it is possible to implement a hard coating layer having a uniform dispersibility and excellent transparency.
- the inorganic nanoparticles are not particularly limited, but one or more selected from the group consisting of SiO 2, Al 2 O 3, CaCO 3, TiO 2, and combinations thereof may be used.
- UV curable resins examples include ethylene glycol diacrylate, neopentyl glycol di (meth) acrylate, 1,6-hexanedioldi (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol hexa (Meth) acrylate, polyol poly (meth) acrylate, di (meth) acrylate of bisphenol A- diglycidyl ether, polyhydric polyacrylates obtained by esterifying polyhydric alcohol and polyhydric carboxylic acid and its anhydride and acrylic acid Ester (meth) acrylate, polysiloxane polyacrylate, urethane (meth) acrylate, pentaerythritol tetramethacrylate, glycerin trimethacrylate, and the like, but are not necessarily limited thereto.
- Curing initiators included in the hard coating layer include benzene, benzene ether compounds, benzyl ketal compounds, ⁇ -hydroxyalkylphenone compounds, ⁇ , ⁇ -dialkoxyacetophenone derivative compounds, ⁇ -hydroxyalkylphenone compounds, ⁇ -amino Alkylphenone derivative compound, ⁇ -hydroxyalkyl phenone high molecular compound, acrylposipine oxide compound, halogen compound, phenylglyxolate compound, banjophenone derivative compound, thioxanthone derivative compound, 1,2-diketone compound, water-soluble aromatic
- ketone compounds, copolymer high molecular compounds, amine compounds, tinanocene compounds, thermal and photopolymerization initiators such as acid anhydrides and peroxides are exemplified.
- the solvent may be used as long as it is commonly used, specifically, alcohols such as methanol, ethanol, propanol and isopropanol, ketones such as methyl isobutyl ketone and methyl ethyl ketone, esters such as methyl acetate and ethyl acetate, toluene, Aromatic compounds, such as xylene and benzene, Ether, such as diethyl ether, etc. are mentioned.
- the high refractive index layer 20 may have a thickness of about 100 nm to about 500 nm, specifically about 150 nm to about 450 nm. By maintaining the thickness range of the high refractive layer, it is possible to easily implement the effect of improving the reflectance and visibility, and minimize the occurrence of cracks and curls due to the increase in stress. In addition, it is possible to provide an antireflection film in which the reflectance optical characteristic value is optimized in relation to the low refractive layer.
- the refractive index of the high refractive index layer 30 may be about 1.6 to about 1.7.
- the low refractive index layer 40 may have a thickness of about 50 nm to about 150 nm. By maintaining the thickness of the low refractive index layer in the above range, an improved antireflection effect can be exhibited, and excellent adhesion of the low refractive index layer can be maintained.
- the refractive index of the low refractive index layer 40 may be about 1.2 to about 1.25, it is possible to improve the optical properties of the antireflection film due to the large refractive index difference with the high refractive index layer.
- the return of some or all of the medium back to the original medium is called reflection. If there is a reflection of light, the amount of light transmitted by the amount of reflection is lost.
- a film for preventing such reflection may be referred to as an antireflection film.
- the antireflection film has a low reflectance, and it is important to secure optical characteristics such as no change in the chrominometer when light is transmitted.
- the antireflection film 100 is, for example, about 1.62 to about PET film on top.
- a high refractive layer having a thickness of about 1.70, a thickness of about 200 nm to about 450 nm, a refractive index of about 1.22 to about 1.25, and a thickness of about 90 nm to about 130 nm, reflectivity and optical properties can be optimized.
- the pencil hardness of the anti-reflection film may be about B to about H.
- the pencil hardness refers to the degree of scratches generated by drawing the pencil five times at a constant load at a 45 ° angle.
- the hardness is indicated by H, F, HB, B, etc.The higher the number of H, the harder the hardness and the higher the hardness.
- the B core of the number is softer, which means that the hardness is lower.
- the anti-reflection film includes a hard coating layer in addition to the high refractive index layer and the low refractive index layer to secure the strength of the anti-reflection film, and the anti-reflection film is antireflection for the touch screen panel by maintaining the pencil hardness range of the above range.
- a hardness of H or more When used as a film can be achieved a hardness of H or more.
- the contact angle of the antireflection film with respect to water may be about 70 ° or less.
- it can be a droplet maintaining a constant lens shape, wherein the surface of the water becomes a curved surface, whereby the surface of the solid and the surface of the water can maintain a constant angle, and the angle is measured inside the liquid. It is called the contact angle.
- the contact angle means a constant angle formed by the surface of the anti-reflection film and water.
- the contact angle of the anti-reflection film is less than about 70 ° has an advantageous effect in that the surface adhesion is excellent, there is no lower limit in the contact angle to the water, specifically, may be about 40 ° to about 70 ° have.
- the reflectivity of the anti-reflection film may be less than about 0.5% in the wavelength region of about 380nm to about 780nm.
- the reflectance refers to the ratio of the energy of the reflected light and the incident light, the lower the reflectance of the anti-reflection film, the less the amount of reflection can be affected by light. Therefore, the antireflection function can be sufficiently exhibited by maintaining the reflectance of less than about 0.5%, and the color of the reflected light may not be blue or reddish because the reflectance is low. In addition, there is an advantage in that it has a flat reflection spectrum and has a colorless color value.
- the antireflection film may have a reflectance of less than about 0.3% in a wavelength region of about 450 nm to about 650 nm.
- the wavelength range of about 450 nm to about 650 nm is a wavelength range smaller than about 380 nm to about 780 nm visible light, and the refractive index and thickness of the high refractive layer, the refractive index and thickness of the low refractive layer are adjusted, and the refractive index and thickness of the hard coating layer are adjusted.
- the adjusted optical design can have optical properties with a reflectance of less than about 0.3%.
- the color a * value and the color b * value of the reflected light may be ⁇ 1 ⁇ a * ⁇ 2 and ⁇ 1 ⁇ b * ⁇ 1.
- CIE International Commission on Illumination
- the color value of the reflected light is determined in the color space based on the CIE 10 ° standard observer (CIE 1964). It can be expressed as CIE L *, a *, b *, which defines the distance between two colors to match the degree of color difference seen by humans.
- L * is the brightness
- a * is Red-Green
- b * is a value between Yellow-blue
- the white light source (D65) is irradiated to the anti-reflection film in the wavelength region of about 380nm to about 780nm
- the resulting value can be represented by the values of a * and b *.
- the sensory difference between two colors is called a color difference, and the color difference can be measured by a color difference meter. Both are possible.
- the antireflection film is a laminated structure of a transparent substrate, a hard coating layer, a high refractive index layer and a low refractive index layer, and by adjusting the thickness and refractive index of each layer, to design an antireflection film, the absolute value of the color value of the reflected light is constant Maintain the range. By maintaining the range of the color a * value and the color b * value it can implement the effect that the anti-reflection film has a colorless color without having a blue or reddish.
- the reflectance is about 0.3 in the visible region. It is possible to infer the structure and thickness of each layer included in the antireflective film of less than% and having the color values of the reflected light of -1 ⁇ a * ⁇ 2 and -1 ⁇ b * ⁇ 1.
- An antireflection film having a reflectance of less than about 0.3% and a color value of reflected light of ⁇ 1 ⁇ a * ⁇ 2 and ⁇ 1 ⁇ b * ⁇ 1 can be designed.
- the antireflection coating composition for antireflection was prepared by stirring at room temperature. Solid content of the prepared antireflective coating composition for low refractive index was found to be 10% by weight, and the pH was found to be 2.5.
- inorganic nanoparticles (trade name XBA-ST, Ilsan Chemical), 35 parts by weight of ultraviolet curable acrylate resin (Kyoeisha), 7 parts by weight of photoinitiator Irgacure-184 (Ciba), and a dilution solvent Dilution with methyl ethyl ketone (MEK) prepared a composition for antireflection hard coating. Solid content of the prepared anti-reflective hard coating composition was found to be 45% by weight.
- the antireflective hard coating composition prepared above was coated on a 125 ⁇ m PET film using a Mayer bar so that the thickness of the hard coating layer was 90 nm, and cured by irradiating 300mJ UV with 180W high pressure mercury to form a hard coating layer.
- a high refractive index layer having a thickness of 200 nm and a refractive index of 1.62 was formed on the hard coating layer, and after coating the prepared antireflection low refractive coating composition with a thickness of 105 nm using a Mayer bar on the high refractive layer, 130 It dried at 2 degreeC for 2 minutes, and formed the reflective coating layer.
- the final antireflection film was prepared by aging for 24 hours in an oven at 60 ° C.
- a final anti-reflection film was prepared in the same manner as in the above example except that a hard coating layer was not formed on the PET film.
- the transmittance of the antireflective films of Examples and Comparative Examples was measured using a CM-5 spectrophotometer manufactured by Konica Minolta, and the reflectance was measured after blacking the reverse side of the antireflective film.
- the white light source D65 and the CIE1964 observer is designated and the CIE L *, a *, b * values, specifically the transmission a *, the transmission b * and the reflection a *, the reflection b according to the antireflection film structure of the examples and the comparative examples. * The value was measured.
- the pencil hardness of the antireflection film was measured according to JIS K 5600-5-4.
- the antireflection film of the embodiment including the hard coating layer was measured to have a larger pencil hardness than the antireflection film of the comparative example does not include a hard coating layer, the strength of the antireflection film due to the hard coating layer It can be seen that the improved.
- FIG. 2 is a graph showing the antireflection film reflectance according to the wavelength region of the embodiment
- FIG. 3 is a graph of the antireflection film reflectance according to the wavelength region of the comparative example, and the reflectance of the comparative example is also less than 0.5% in the wavelength region of about 450 nm to about 650 nm. Although measured as, it can be seen that the reflectance of the Example has a reflectance of 0.3% or less more stably than the comparative example.
- the color a * value of the reflected light of the anti-reflection film of the embodiment was measured to be between -1 to 2
- the color b * value is between -1 to 1
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Abstract
Description
구성 | 실시예 | 비교예 | |
저굴절층 | 굴절률 | 1.23 | 1.23 |
두께(nm) | 105 | 105 | |
고굴절층 | 굴절률 | 1.64 | 1.64 |
두께(nm) | 200 | 200 | |
하드코팅층 | 굴절률 | 1.52 | - |
두께(nm) | 90 | - | |
PET | 굴절률 | 1.66 | 1.66 |
두께(㎛) | 125 | 125 |
구성 | 실시예 | 비교예 |
투과율(%) | 99.64 | 98.93 |
반사율(%) | 0.205 | 0.493 |
연필경도 | H | 2B |
투과 a* | -0.28 | -0.03 |
투과 b* | 0.34 | 0.18 |
반사 a* | 1.99 | -0.05 |
반사 b* | -0.10 | 1.02 |
Claims (14)
- 투명기재, 하드코팅층, 고굴절층 및 저굴절층의 적층구조이고,상기 저굴절층이 하기 화학식 1로 표시되는 실란 화합물과 하기 화학식 2로 표시되는 오르가노실란 화합물이 중합되어 형성되는 바인더; 및 중공실리카 입자를 포함하는 반사 방지 필름.[화학식 1]R1 xSi(OR2)4-x상기 화학식 1에서, R1은 탄소수 1 ~ 10의 알킬기, 탄소수 6 ~ 10 의 아릴기 또는 탄소수 3 ~ 10의 알케닐기이고, R2 는 탄소수 1 ~ 6의 알킬기이며, x는 0≤x<4의 정수를 나타낸다.[화학식 2]R3 ySi(OR4)4-y상기 화학식 2에서, R3은 탄소수 1 ~ 12의 플루오로알킬기이고, R4는 탄소수 1 ~ 6의 알킬기이며, y는 0≤x<4의 정수를 나타낸다.
- 제 1항에 있어서,상기 화학식 1로 표시되는 실란 화합물은 테트라메톡시실란, 테트라에톡시실란, 테트라프로폭시실란, 테트라이소프로폭시실란, 테트라-n-부톡시실란, 테트라-sec-부톡시실란, 테트라-tert-부톡시실란, 트리메톡시실란, 트리에톡시실란, 메틸트리메톡시실란, 메틸트리에톡시실란, 에틸트리메톡시실란, 에틸트리에톡시실란, 프로필트리메톡시실란, 프로필트리에톡시실란, 이소부틸트리에톡시실란, 시클로헥실트리메톡시실란, 페닐트리메톡시실란, 페닐트리에톡시실란, 비닐트리메톡시실란, 비닐트리에톡시실란, 알릴트리메톡시실란 알릴트리에톡시실란, 디메틸디메톡시실란, 디메틸디에톡시실란, 디페닐디메톡시실란, 디페닐디에톡시실란 및 이들의 조합으로 이루어진 군으로부터 선택되는 하나 이상의 화합물인반사 방지 필름.
- 제 1항에 있어서,상기 화학식 2로 표시되는 오르가노실란 화합물은 트리플루오로메틸트리메톡시실란, 트리플루오로메틸트리에톡시실란, 트리플루오르프로필트리메톡시실란, 트리플루오르프로필트리에톡시실란, 노나플루오로부틸에틸트리메톡시실란, 노나플루오로부틸에틸트리에톡시실란, 노나플루오로헥실트리메톡시실란, 노나플루오로헥실트리에톡시실란, 트리데카플루오로옥틸트리메톡시실란, 트리데카플루오로옥틸트리에톡시실란, 헵타데카플루오로데실트리메톡시실란, 헵타데카플루오로데실트리에톡시실란 및 이들의 조합으로 이루어진 군으로부터 선택되는 하나 이상의 화합물인반사 방지 필름.
- 제 1항에 있어서,상기 중공 실리카 입자는 수평균 직경이 1nm 내지 1,000 nm인반사 방지 필름.
- 제 1항에 있어서,상기 바인더는 상기 중공 실리카 입자 100 중량부에 대하여 10중량부 내지 120중량부 포함되는반사 방지 필름.
- 제 1항에 있어서,상기 하드코팅층의 굴절률은 1.5 내지 1.6인반사 방지 필름.
- 제 1항에 있어서,상기 하드코팅층의 두께는 50nm 내지 200nm인반사 방지 필름.
- 제 1항에 있어서,상기 하드코팅층은 무기물 나노입자, 자외선 경화형 수지, 경화개시제 및 용매를 포함하는반사방지 필름.
- 제 1항에 있어서,상기 저굴절층의 굴절율은 1.2 내지 1.25인반사 방지 필름.
- 제 1항에 있어서,상기 고굴절층의 굴절율은 1.6 내지 1.7인반사 방지 필름.
- 제 1항에 있어서,상기 반사 방지 필름의 연필경도가 B 내지 H인반사방지 필름.
- 제 1항에 있어서,상기 반사 방지 필름의 물에 대한 접촉각이 70°이하인반사 방지 필름.
- 제 1항에 있어서,상기 반사 방지 필름의 반사율은 380nm 내지 780nm 파장영역에서 0.5%미만인반사 방지 필름.
- 제 1항에 있어서,상기 반사 방지 필름에 백색광을 조사할 때 반사광의 색상 a*값 및 색상 b* 값이 -1<a*<2, -1<b*<1인반사 방지 필름.
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US14/443,645 US9606267B2 (en) | 2012-11-21 | 2013-10-14 | Anti-reflective film, comprising hard coating layer, having superb optical characteristics |
CN201380060944.1A CN104813198B (zh) | 2012-11-21 | 2013-10-14 | 包含硬涂层的光特性优秀的防反射膜 |
JP2015543955A JP6642823B2 (ja) | 2012-11-21 | 2013-10-14 | ハードコーティング層を含む光特性に優れた反射防止フィルム |
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KR101526650B1 (ko) * | 2012-11-21 | 2015-06-05 | (주)엘지하우시스 | 광학특성이 우수한 반사방지 필름 |
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2012
- 2012-11-21 KR KR1020120132542A patent/KR101526649B1/ko not_active Expired - Fee Related
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2013
- 2013-10-14 WO PCT/KR2013/009123 patent/WO2014081119A1/ko active Application Filing
- 2013-10-14 JP JP2015543955A patent/JP6642823B2/ja not_active Expired - Fee Related
- 2013-10-14 CN CN201380060944.1A patent/CN104813198B/zh not_active Expired - Fee Related
- 2013-10-14 US US14/443,645 patent/US9606267B2/en not_active Expired - Fee Related
- 2013-11-05 TW TW102140126A patent/TWI609783B/zh not_active IP Right Cessation
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EP3333598A4 (en) * | 2015-08-05 | 2018-06-13 | Panasonic Intellectual Property Management Co., Ltd. | Composition for optical films, base having optical film, molded body and method for producing molded body |
Also Published As
Publication number | Publication date |
---|---|
JP2015537249A (ja) | 2015-12-24 |
CN104813198B (zh) | 2016-10-12 |
CN104813198A (zh) | 2015-07-29 |
JP6642823B2 (ja) | 2020-02-12 |
US20150301231A1 (en) | 2015-10-22 |
TWI609783B (zh) | 2018-01-01 |
KR20140065250A (ko) | 2014-05-29 |
KR101526649B1 (ko) | 2015-06-05 |
US9606267B2 (en) | 2017-03-28 |
TW201420351A (zh) | 2014-06-01 |
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