KR20120129643A - Coating composition for anti-glare and anti-reflection, film using the same, polarizing plate, and display device - Google Patents

Abstract

PURPOSE: An antiglare anti-reflective coating composition, an antiglare anti-reflective film, a polarizing plate and a displaying device forms an antiglare anti-reflective layer. CONSTITUTION: An antiglare anti-reflective coating composition includes transparent resin, hollow silica, a transparent particle, an initiator and a solvent. The hollow silica includes between 5 weight units and 60 weight units for the whole 100 weight units of the antiglare anti-reflective coating composition. A refractive index of the hollow silica is between 1.17 degrees and 1.40 degrees. An average particle diameter of a hollow silica particle is between 30nm and 150nm.

Description

Anti-glare anti-reflective coating composition, anti-glare anti-reflective film, polarizing plate and display device using the same {COATING COMPOSITION FOR ANTI-GLARE AND ANTI-REFLECTION, FILM USING THE SAME, POLARIZING PLATE, AND DISPLAY DEVICE}

The present invention relates to an antiglare antireflective coating composition, an antiglare antireflection film, a polarizing plate, and a display device using the same.

The anti-glare film has a function of reducing reflection of external light by using diffuse reflection due to surface irregularities. The anti-glare film is disposed on a surface of various display panels, for example, a liquid crystal display (LCD), a plasma display (PDP), a CRT, an electroluminescent display (EL), and the like to prevent a decrease in contrast due to reflection of external light. It is used for the purpose of preventing the fall of the visibility of a display by image reflection.

In recent years, an anti-reflection layer is additionally formed on the anti-glare film for excellent image effects. The antireflection layer theoretically has a thickness corresponding to λ / 4n, λ is the wavelength, n is the refractive index of the antireflection layer, and the refractive index corresponding to n = v (substrate) in order to achieve the best antireflection performance in the visible light wavelength range. A layer having a thickness of about 100 nm should be formed on the anti-glare layer.

However, in order to have excellent anti-glare property, surface irregularities having an average surface roughness value of Ra of 0.1 μm or more are required, and it is difficult to form an antireflection layer uniformly at a thickness of 100 nm on the surface having the irregularities. Have. In addition, the mechanical strength of the surface thin film has a weak disadvantage to scratch, there is a disadvantage such as an expensive process cost is required because at least two or more processes, such as forming an antiglare layer and an anti-reflection layer is required.

Therefore, in order to overcome the problems of the prior art described above, it is possible to form an anti-glare anti-reflective layer that can simultaneously exhibit anti-glare and anti-reflection as a single coating process, and can control Ra to 0.1um or more. It is an object of the present invention to provide an anti-glare anti-reflective coating composition that can exhibit excellent anti-glare and anti-reflective properties, as well as improve scratch resistance and reduce process costs.

It is another object of the present invention to provide an anti-glare anti-reflection film excellent in anti-glare and anti-reflection.

Another object of the present invention is to provide a polarizing plate and a display device having excellent anti-glare property and anti-reflection property.

In order to achieve the above object, the present invention comprises a light-transmissive resin (A), hollow silica (B), light-transmitting particles (C), an initiator (D) and a solvent (E) To provide a composition.

The hollow silica may be included 5 to 60 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition.

The hollow silica preferably has a refractive index of 1.17 to 1.40.

The average particle diameter of the hollow silica particles is preferably 30nm ~ 150nm.

It is preferable that the said translucent particle is 1-10 micrometers in average particle diameter.

The light-transmitting particles are preferably contained in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition.

In order to achieve another object of the present invention, the present invention is an anti-glare, characterized in that it comprises an anti-glare anti-reflection layer formed by applying and then curing the anti-glare anti-reflective coating composition according to the present invention on one or both sides of the substrate Provide an antireflection film.

The anti-glare antireflection film preferably has a surface roughness Ra of 0.1 μm or more and 0.5 μm or less and an integrating sphere reflectance of 3% or less.

In order to achieve another object of the present invention, the present invention provides a polarizing plate, characterized in that the anti-glare antireflection film is provided.

In order to achieve another object of the present invention, the present invention provides a display device characterized in that the anti-glare antireflection film is provided.

The anti-glare anti-reflective coating composition according to the present invention comprises a light-transmitting particle and hollow silica particles exhibits a property capable of forming an anti-glare anti-reflective layer that can simultaneously exhibit anti-glare and anti-reflective properties as a single coating process . Therefore, when the anti-glare anti-reflective coating composition is applied to film production, Ra can be controlled to 0.1 μm or more, thereby exhibiting excellent anti-glare and anti-reflective properties, and improving the scratch resistance and reducing the process cost. It is possible to produce an anti-glare antireflection film. The anti-glare antireflection film may be usefully applied to a polarizing plate and a display device.

Hereinafter, the present invention will be described in detail.

The anti-glare antireflective coating composition according to the present invention comprises a light transmitting resin (A), hollow silica (B), light transmitting particles (C), an initiator (D) and a solvent (E). Each component is described in detail as follows.

Translucency  Resin (A)

 The light-transmissive resin can be used without limitation those generally used in the art.

Preferably, the light transmitting resin may include a photocurable (meth) acrylate oligomer and / or a photocurable monomer.

The (meth) acrylate oligomer may be, for example, epoxy (meth) acrylate, urethane (meth) acrylate or the like, and urethane (meth) acrylate may more preferably be used.

The urethane (meth) acrylate can be produced in the presence of a catalyst having a polyfunctional (meth) acrylate having a hydroxyl group in the molecule and an isocyanate group.

Specific examples of the (meth) acrylate having a hydroxy group in the molecule include 2-hydroxyethyl (meth) acrylate, 2-hydroxyisopropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and capro It may be selected from one or more selected from the group consisting of lactone ring-opened hydroxyacrylate, pentaerythritol tri / tetra (meth) acrylate mixture, and dipentaerythritol penta / hexa (meth) acrylate mixture.

Specific examples of the compound having an isocyanate group include 1,4-diisocyanatobutane, 1,6-diisocyanatohexane, 1,8-diisocyanatooctane, 1,12-diisocyanatododecane, 1, 5-diisocyanato-2-methylpentane, trimethyl-1,6-diisocyanatohexane, 1,3-bis (isocyanatomethyl) cyclohexane, trans-1,4-cyclohexene diisocyanate, 4,4 '-Methylenebis (cyclohexyl isocyanate), isophorone diisocyanate, toluene-2,4-diisocyanate, toluene-2,6-diisocyanate, xylene-1,4-diisocyanate, tetramethylxylene-1, 3-diisocyanate, 1-chloromethyl-2,4-diisocyanate, 4,4'-methylenebis (2,6-dimethylphenylisocyanate), 4,4'-oxybis (phenylisocyanate), hexamethylene diisocyanate Trifunctional Isocyanates Derived from, and Trimethane Propanol Adduct Toluenediiso O it may be one or more selected from the group consisting of carbonate.

The photocurable monomer specifically has an unsaturated group such as a (meth) acryloyl group, a vinyl group, a styryl group or an allyl group as a photocurable functional group in the molecule, and among these, a (meth) acryloyl group is more preferable.

Specific examples of the monomer having a (meth) acryloyl group include neopentyl glycol acrylate, 1,6-hexanediol (meth) acrylate, propylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, Dipropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, trimethylol ethane tri (meth) acrylate, 1 , 2,4-cyclohexane tetra (meth) acrylate, pentaglycerol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol tri (meth) acrylate , Dipentaerythritol penta (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate Yit, tripentaerythritol tri (meth) acrylate, tripentaerythritol hexatri (meth) acrylate, bis (2-hydroxyethyl) isocyanurate di (meth) acrylate, hydroxyethyl (meth) acrylate , Hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, isooctyl (meth) acrylate, iso-decyl (meth) acrylate, stearyl (meth) acrylate, tetrahydrofurfuryl (meth ) Acrylate, phenoxyethyl (meth) acrylate, isobornol (meth) acrylate may be selected from one or more kinds.

The photocurable (meth) acrylate oligomers and / or photocurable monomers exemplified above may be used alone or in combination of two or more.

The light-transmissive resin is not particularly limited, but may include 1 to 80 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition. If the content of the light-transmitting resin is less than 1 part by weight, it is difficult to sufficiently improve the hardness. If the amount is more than 80 parts by weight, curling becomes worse.

Hollow silica (B)

The hollow silica particles are used to lower the refractive index to increase antireflection properties and to increase hardness.

The refractive index of the hollow silica particles is preferably 1.17 to 1.40, more preferably 1.17 to 1.35, and most preferably 1.17 to 1.30. Here, the refractive index does not mean the refractive index of the silica, that is, the refractive index of the outer portion forming the hollow particles, but rather the refractive index of the entire particle.

At this time, the porosity in the hollow silica particles is preferably in the range of 10 to 60%, more preferably in the range of 20 to 60%, and most preferably in the range of 30 to 60%.

When trying to achieve low refractive index and high porosity of hollow silica particles, the thickness of the outer edge is reduced and the strength of the particles is weakened. Therefore, from the viewpoint of hardness, any particle having a refractive index of less than 1.17 of the hollow silica particles is not preferable because of its low hardness. In addition, when the refractive index of the hollow silica particles exceeds 1.40, the refractive index is high, and thus the antireflection property is not preferable. The refractive index of the hollow silica particles is measured using an Abbe refractive index meter (manufactured by ATAGO).

The average particle diameter of the hollow silica particles is preferably 30 nm to 150 nm, more preferably 35 nm to 80 nm, and particularly preferably 40 nm to 60 nm. When the hollow silica particles are in the above-described range, the ratio of the cavities becomes high so that a low refractive index can be achieved. The hollow silica particles may be crystalline particles or amorphous particles, with monodisperse particles being preferred. In view of the shape, spherical particles are most preferred, but amorphous particles can be used without problems. The average particle diameter of the hollow silica fine particles is also measured by using an electron micrograph.

The hollow silica particles may be a surface treated with a silane coupling agent, in which case the dispersibility with the solvent is improved and participates in curing during the curing process to improve the durability of the coating layer by forming a network with a binder.

The silane coupling agent is specifically methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, diphenyldimethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, diphenyldie Methoxysilane, isobutyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (β-methoxyethoxy) silane, 3,3,3-trifluoropropyltrimethoxysilane, methyl -3,3,3-trifluoropropyldimethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-glycidoxymethyltrimethoxysilane, γ-glycidoxymethyltri Ethoxysilane, γ-glycidoxyethyltrimethoxysilane, γ-glycidoxyethyltriethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ- (β-glycidoxymethoxy) propyltrimethoxysilane, γ- (meth) acrylooxymethyltrimethoxysil , γ- (meth) acrylooxymethyltriethoxysilane, γ- (meth) acryloxyethyltrimethoxysilane, γ- (meth) acryloxyethyltriethoxysilane, γ- (meth) acrylo Oxypropyltrimethoxysilane, γ- (meth) acrylooxypropyltrimethoxysilane, γ- (meth) acryloxyoxytriethoxysilane, butyltrimethoxysilane, isobutyltriethoxysilane, hexyltrie Oxysilaoctyltriethoxysilane, decyltriethoxysilane, butyltriethoxysilane, isobutyltriethoxysilane, hexyltriethoxysilane, octyltriethoxysilane, 3-ureidoisopropylpropyltriethoxysilane, Perfluorooctylethyltrimethoxysilane, perfluorooctylethyltriethoxysilane, perfluorooctylethyltriisopropoxysilane, tripleuropropyltrimethoxysilane, N-β- (aminoethyl) γ- Aminopropylmethyldimethoxysilane, N-β- (aminoethyl) γ-a At least one selected from the group consisting of nopropyltrimethoxysilane, N-phenyl-γ- (aminopropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, trimethylsilanol, and methyltrichlorosilane Can be.

The hollow silica particles can be preferably used dispersed in a solvent.

The solvent may be a conventional one, and specific examples thereof include methanol, ethanol, isopropanol, butanol and octanol; Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone and cyclohexanone; Esters such as ethyl acetate, butyl acetate, ethyl lactate and γ-butyrolactone; Ethers such as ethylene glycol monomethyl ether and diethylene glycol monobutyl ether; Aromatic hydrocarbons such as benzene, toluene and xylene; And amides such as dimethylformamide, dimethyl acetamide, N-methylpyrrolidone and the like.

In the above solvents, methanol, isopropanol, butanol, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, butyl acetate, toluene and xylene are more preferred and can be used in combination of one or more kinds.

The content of the hollow silica particles is not necessarily limited, but may be 5 to 60 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition. If the content of the hollow silica particles is less than 5 parts by weight based on the above it is not possible to obtain a sufficient refractive index reduction effect, if the content exceeds 60 parts by weight there is a problem of curling the film.

Translucency  Particle (C)

The light-transmitting particles are not particularly limited and may be used as long as they are generally used for imparting antiglare properties.

Examples of the light-transmitting particles include silicone resin particles, melamine resin particles, acrylic resin particles, styrene resin particles, acrylic-styrene resin particles, polycarbonate resin particles, polyethylene resin particles, vinyl chloride resin particles, and the like. You can use The light-transmitting particles exemplified above may be used alone or in combination of two or more thereof.

It is preferable that the average particle diameter of the said translucent particle is 1-10 micrometers. If the average particle diameter of the light-transmitting particles is less than 1 ㎛ difficult to form irregularities on the surface of the anti-glare antireflection layer has a low anti-glare property, if more than 10 ㎛ the surface of the anti-glare anti-reflection layer is rough, the visibility is poor There is this.

In addition, the light-transmitting particles are preferably contained in 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition. If the light-transmitting particles are less than 0.5 parts by weight based on the above criteria, the anti-glare property is inferior.

Photoinitiator (D)

The photoinitiator can be used without limitation as long as it is used in the art. Preferably, the photoinitiator may be at least one selected from the group consisting of hydroxy ketones, aminoketones, and hydrogen recyclable photoinitiators.

Specific examples of the photoinitiator include 2-methyl-1- [4- (methylthio) phenyl] 2-morpholinepropanone-1, diphenylketone benzyldimethyl ketal, 2-hydroxy-2-methyl-1- Phenyl-1-one, 4-hydroxycyclophenylketone, dimethoxy-2-phenylatetophenone, anthraquinone, fluorene, triphenylamine, carbazole, 3-methylacetophenone, 4-knoloacetophenone, At least one selected from the group consisting of 4,4-dimethoxyacetophenone, 4,4-diaminobenzophenone, 1-hydroxycyclohexylphenylketone and benzophenone can be used.

The photoinitiator may be used in an amount of 0.1 to 10 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition. When the content of the photoinitiator is less than 0.1 parts by weight based on the above, the curing rate is slow, and when it exceeds 10 parts by weight, cracks may occur in the anti-glare antireflection layer due to overcuring.

Solvent (E)

 The solvent may be used without limitation as long as it is used in the antiglare layer or the antireflective layer forming composition.

For example, the solvent may be at least one selected from the group consisting of alcohols (methanol, ethanol, isopropanol, butanol, methylcellulose, ethylsulosorb), ketones (methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, diethyl ketone, Ketone, cyclohexanone, etc.), hexane (hexane, heptane, octane etc.), benzene (benzene, toluene, xylene and the like) The solvents exemplified above may be used alone or in combination of two or more.

The amount of the solvent may be included in 10 to 95 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition. If the amount of the solvent is less than 10 parts by weight, the viscosity of the composition is low, and if the amount of the solvent exceeds 95 parts by weight, the curing process is time-consuming and economical.

In addition to the above components, the anti-glare antireflective coating composition of the present invention may further include at least one selected from the group consisting of antioxidants, UV absorbers, light stabilizers, leveling agents, surfactants, and antifouling agents, as necessary.

The present invention provides an anti-glare anti-reflection film prepared using the anti-glare anti-reflective coating composition of the present invention described above. That is, the anti-glare anti-reflection film of the present invention includes an anti-glare anti-reflection layer formed by applying and then curing the anti-glare anti-reflective coating composition according to the present invention on one side or both sides of the transparent substrate.

As the transparent substrate, any film can be used as long as the film has transparency. For example, the transparent substrate may include cycloolefin derivatives having a unit of a monomer including a cycloolefin such as norbornene or a polycyclic norbornene monomer, cellulose (diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, iso Butyl ester cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose), ethylene-vinyl acetate copolymer, polyester, polystyrene, polyamide, polyetherimide, polyacryl, polyimide, polyethersulfone, polysulfone, Polyethylene, polypropylene, polymethylpentene, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl acetal, polyether ketone, polyether ether ketone, polyether sulfone, polymethyl methacrylate, polyethylene terephthalate, poly Butylene Terephthalate, Paul It may be selected from selected from ethylene terephthalate, polycarbonate, polyurethane, epoxy, can be used an undrawn, uniaxially or biaxially stretched film. Preferably, uniaxial or biaxially stretched polyester films excellent in transparency and heat resistance, and triacetylcellulose films having no transparency and optically anisotropy can be used.

Preferably the thickness of the said transparent base material is about 8-1000 micrometers, More preferably, it is 40-100 micrometers.

Application of the anti-glare antireflective coating composition may be suitably used a known method such as die coater, air knife, reverse roll, spray, blade, casting, gravure, spin coating.

The coating thickness of the anti-glare antireflective coating composition is preferably 3 to 50 µm, more preferably 5 to 30 µm, and most preferably 10 to 25 µm. After application, the anti-glare antireflective coating composition is dried by evaporation of volatiles for 10 seconds to 1 hour, preferably 30 seconds to 10 minutes at a temperature of 30 ~ 150 ℃, and then cured by irradiation with UV light. The irradiation amount of UV light is about 0.01-10 J / cm <^2> , Preferably it is 0.1-2J / cm <^2> .

In this case, the anti-glare antireflection film preferably has a surface roughness Ra of 0.1 μm or more and 0.5 μm or less and an integrating sphere reflectance of 3% or less. When the Ra value and the integrating sphere reflectance are included in the above range, not only the anti-glare property but also the anti-reflection property also show excellent results.

The present invention provides a polarizing plate provided with an anti-glare antireflection film according to the present invention described above.

That is, the polarizing plate of the present invention may be formed by laminating the anti-glare antireflection film according to the present invention on one side or both sides of a conventional polarizer. The polarizer may be provided with a protective film on at least one surface.

The polarizer is a film uniaxially stretched by adsorbing a dichroic substance such as iodine or a dichroic dye to a hydrophilic polymer film such as a polyvinyl alcohol film or an ethylene-vinyl acetate copolymerized partial saponified film. Polyene type alignment films, such as a dehydration thing and the dehydrochlorination material of polyvinyl chloride, etc. can be used. Preferably it may be made of a dichroic material such as polyvinyl alcohol-based film and iodine. Although the thickness of these polarizers is not specifically limited, Generally, it is about 5-80 micrometers.

When the polarizer is provided with a protective film on at least one surface, the protective film may be preferably applied excellent in transparency, mechanical strength, thermal stability, moisture shielding, isotropy.

For example, the protective film may be a polyester film such as polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate or the like; Cellulose films such as diacetyl cellulose and triacetyl cellulose; Polycarbonate film; Acrylic films such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene films such as polystyrene and acrylonitrile-styrene copolymers; Polyolefin-based films such as polyethylene, polypropylene, cyclo- or polyolefin-based films having a norbornene structure, and ethylene propylene copolymers; Polyimide film; Polyether sulfone-based film; Sulfone type films and the like can be used. Among the protective films exemplified above, a triacetyl cellulose film may be preferably used in view of excellent transparency and no optically anisotropy. The thickness of the protective film is not particularly limited, and is preferably 8 to 1000 µm, more preferably 40 to 100 µm.

The present invention provides a display device with an anti-glare antireflection film according to the present invention described above.

For example, the display device according to the present invention may be manufactured by embedding the polarizing plate with the anti-glare antireflection film according to the present invention described above in the display device. In addition, the anti-glare antireflection film of the present invention can also be attached to the window of the display device. The anti-glare antireflection film of the present invention can be preferably used in reflective, transmissive, semi-transmissive LCD or LCD of various driving methods such as TN type, STN type, OCB type, HAN type, VA type, and IPS type. Moreover, the anti-glare antireflection film of this invention can be used suitably also in various display apparatuses, such as a plasma display, a field emission display, an organic electroluminescent display, an inorganic electroluminescent display, and an electronic paper.

Hereinafter, the present invention will be described in more detail with reference to Examples. These examples are only for illustrating the present invention, it is obvious to those skilled in the art that the scope of the present invention is not limited to these examples.

Preparation Example 1 Preparation of Anti-glare Anti-reflective Coating Composition

5 parts by weight of urethane acrylate (Miwon Corporation, SC2153), 2 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 18 parts by weight of hollow silica (refractive index of 1.20, average particle diameter of 75 nm), 72 parts by weight of methyl isobutyl ketone, 1.5 parts by weight of light-transmitting particles (acrylic resin particles, average particle diameter of 4.5 um), 1 part by weight of photoinitiator (Ciba, I-184), 0.5 parts by weight of leveling agent (BYK Chemisa, BYK378) were mixed using a stirrer and made of PP material. Filtration was carried out using a filter of to prepare an anti-glare antireflective coating composition having a refractive index of 1.28.

Preparation Example 2 Preparation of Anti-glare Anti-reflective Coating Composition

5 parts by weight of urethane acrylate (Miwon Corporation, SC2153), 2 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 18 parts by weight of hollow silica (refractive index of 1.25, average particle diameter of 55 nm), 72 parts by weight of isopropyl alcohol, 1.5 parts by weight Parts by weight of light-transmitting particles (acrylic resin particles, average particle diameter of 4.5 um), 1 part by weight of photoinitiator (Ciba, I-184), and 0.5 part by weight of leveling agent (BYK Chemisa, BYK378) using a stirrer and made of PP material. Filtration using a filter to prepare an anti-glare antireflective coating composition having a refractive index of 1.32.

Preparation Example 3 Preparation of Anti-glare Anti-reflective Coating Composition

9 parts by weight urethane acrylate (Miwon Corporation, SC2153), 8 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 16 parts by weight hollow silica (refractive index 1.30, average particle diameter 85 nm) 64 parts by weight isopropyl alcohol, 1.5 parts by weight PP light filter (acrylic resin particle, average particle diameter: 4.5um), 1 part by weight photoinitiator (Ciba, I-184), 0.5 parts by weight leveling agent (BYK Chemisa, BYK378) are blended using a stirrer Filtration using to prepare an anti-glare antireflective coating composition having a refractive index of 1.40.

Preparation Example 4 Preparation of Anti-glare Anti-reflective Coating Composition

5 parts by weight of urethane acrylate (Miwon Corporation, SC2153), 2 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 18 parts by weight of hollow silica (refractive index of 1.20, average particle diameter of 75 nm), 72 parts by weight of methyl isobutyl ketone, 1.5 parts by weight of translucent particles (acrylic resin particles, average particle diameter of 3 um), 1 part by weight of photoinitiator (Ciba, I-184) and 0.5 parts by weight of leveling agent (BYK Chemisa, BYK378) were mixed using a stirrer and made of PP material. Filtration using a filter to prepare an anti-glare antireflective coating composition having a refractive index of 1.28.

Preparation Example 5 Preparation of Anti-glare Anti-reflective Coating Composition

5 parts by weight of urethane acrylate (Miwon Corporation, SC2153), 2 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 18 parts by weight of hollow silica (refractive index of 1.20, average particle diameter of 75 nm), 72 parts by weight of methyl isobutyl ketone, 1.5 parts by weight of light-transmitting particles (styrene resin particles, average particle diameter of 4.5 um), 1 part by weight of photoinitiator (Ciba, I-184), 0.5 parts by weight of leveling agent (BYK Chemisa, BYK378) were blended using a stirrer and PP Filtration was performed using a filter made of a material to prepare an anti-glare antireflective coating composition having a refractive index of 1.28.

Preparation Example 6 Preparation of Anti-glare Anti-reflective Coating Composition

5 parts by weight of urethane acrylate (Miwon Corporation, SC2153), 2 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 18 parts by weight of hollow silica (refractive index of 1.20, average particle diameter of 75 nm), 72 parts by weight of methyl isobutyl ketone, 1.5 parts by weight of light-transmitting particles (silicone resin particles, average particle diameter of 5 um), 1 part by weight of photoinitiator (Ciba, I-184) and 0.5 parts by weight of leveling agent (BYK Chemi, BYK378) were blended using a stirrer and made of PP material. Filtration using a filter to prepare an anti-glare antireflective coating composition having a refractive index of 1.28.

Preparation Example 7 Preparation of Anti-glare Anti-reflective Coating Composition

30 parts by weight urethane acrylate (Miwon Corporation, SC2153), 20 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 5 parts by weight hollow silica (refractive index 1.20, average particle diameter 75nm), 40.5 parts by weight methyl isobutyl ketone, 3 parts by weight of translucent particles (silicone resin particles, average particle diameter of 5 um), 1 part by weight of photoinitiator (Ciba, I-184) and 0.5 parts by weight of leveling agent (BYK Chemisa, BYK378) were mixed using a stirrer and made of PP material. Filtration using a filter to prepare an anti-glare antireflective coating composition having a refractive index of 1.47.

Preparation Example 8 Preparation of Anti-glare Anti-reflective Coating Composition

30 parts by weight urethane acrylate (Miwon Corporation, SC2153), 18 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 5 parts by weight hollow silica (refractive index 1.20, average particle diameter 75nm), 40.5 parts by weight methyl isobutyl ketone, 5 parts by weight of translucent particles (silicone resin particles, average particle diameter 5um), 1 part by weight photoinitiator (Ciba, I-184) and 0.5 parts by weight leveling agent (BYK Chemisa, BYK378) were blended using a stirrer and made of PP material. Filtration using a filter to prepare an anti-glare antireflective coating composition having a refractive index of 1.47.

Preparation Example 9 Preparation of Anti-glare Coating Composition

25 parts by weight of urethane acrylate (Miwon Corporation, SC2153), 18.5 parts by weight pentaerythritol triacrylate (Miwon Corporation, M340), 2 parts by weight of translucent particles (acrylic resin particles, average particle diameter of 4.5 um), 50 parts by weight of methyl ethyl ketone (Great Gold), 4 parts by weight of photoinitiator (Shiba Corporation, I-184), 0.5 parts by weight leveling agent (BYK Chemisa, BYK378) are blended using a stirrer and filtered using a filter made of PP material to have a refractive index of 1.49. An anti-glare composition was prepared.

 [Examples 1 to 10 and Comparative Examples 1 to 2]

An anti-glare antireflection film was prepared by coating a coating composition prepared from the preparation example on one surface of a triacetyl cellulose film having a thickness of 80 μm, as shown in Table 1, followed by UV curing after heat drying.

In this case, in the case of Comparative Example 2 after coating 4um of the coating solution of Preparation Example 7 after coating the low refractive coating solution TU-2189 (JS R, refractive index 1.35) on the anti-glare coating layer to a thickness of 100nm after drying and UV curing An anti-glare antireflection film was prepared.

<Experimental Example>

Physical properties of the anti-glare anti-reflective film prepared as described below are measured and the results are shown in Table 1 below.

1) Ra (um)

The anti-glare antireflection film thus prepared was bonded to a black acrylic plate, and then measured at a thousand-fold magnification through a confocal microscope (VK-9510, manufactured by Keyence) to measure the surface roughness value (JIS B0601).

2) anti-glare

After the prepared anti-glare antireflection film was bonded to the black acrylic plate, the reflection of the three-wavelength fluorescent lamp on the surface of the coating layer was checked to determine the contour of the fluorescent lamp to evaluate the anti-glare property.

◎: fluorescent light contour not found

○: Only the position of the fluorescent lamp outline can be checked dimly, but the line is not clear

X: Reflected clearly enough to accurately draw fluorescent outline

3) Integral sphere reflectance

After the prepared anti-glare antireflection film was bonded to a black acrylic plate, the integral sphere reflectance of the surface of the coating layer was measured using a spectrophotometer (manufactured by Konica Minolta, CM-3700d).

4) scratch resistance

After the prepared anti-glare antireflection film was bonded to the glass plate, the surface of the coating layer was repeated 10 times with an area of 1000g / 4cm ^ 2 by using a steel wool measuring device (manufactured by Daeyoung Science) and scraped with steel wool to check the surface state. .

◎: less than 10 scratches on the surface

○: less than 20 scratches on the surface

X: coating layer peeling

Coating solution Coating thickness (um) Ra (um) Anti-glare Integral sphere reflectance (%) Scratch resistance Example 1 Preparation Example 1 2 0.42 ◎ 1.6% ○ Example 2 Preparation Example 1 3 0.32 ◎ 1.5% ○ Example 3 Preparation Example 1 4 0.23 ◎ 1.4% ◎ Example 4 Preparation Example 2 4 0.22 ◎ 1.9% ◎ Example 5 Production Example 3 4 0.18 ○ 2.9% ◎ Example 6 Production Example 4 2 0.25 ◎ 1.8% ◎ Example 7 Production Example 5 4 0.21 ◎ 1.8% ◎ Example 8 Production Example 6 4 0.26 ◎ 1.4% ◎ Example 9 Preparation Example 7 4 0.25 ◎ 3.3% ◎ Example 10 Preparation Example 8 4 0.33 ◎ 3.1% ◎ Comparative Example 1 Production Example 9 4 0.28 ◎ 4.5% ○ Comparative Example 2 Preparation Example 9
Anti-reflective layer overcoating 4 / 100nm 0.26 Coating defect 3.2% X

As shown in Table 1, in the case of preparing an anti-glare antireflection film using an anti-glare antireflective coating composition comprising both hollow silica and translucent particles according to the present invention, the composition does not contain hollow silica particles. It can be confirmed that the anti-glare property and the anti-reflection property is very excellent compared to Comparative Examples 1 and 2 to produce a film using.

Claims (10)

An anti-glare antireflective coating composition comprising a light transmitting resin (A), hollow silica (B), light transmitting particles (C), an initiator (D) and a solvent (E).
The anti-glare antireflective coating composition according to claim 1, wherein the hollow silica is included in an amount of 5 to 60 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition.
The anti-glare antireflection coating composition of claim 1, wherein the hollow silica has a refractive index of 1.17 to 1.40.
The anti-glare antireflective coating composition according to claim 1, wherein the hollow silica particles have an average particle diameter of 30 nm to 150 nm.
The anti-glare antireflective coating composition according to claim 1, wherein the translucent particles have an average particle diameter of 1 to 10 µm.
The anti-glare antireflective coating composition of claim 1, wherein the translucent particles are contained in an amount of 0.5 to 20 parts by weight based on 100 parts by weight of the total anti-glare antireflective coating composition.
An anti-glare anti-reflection film, characterized in that it comprises an anti-glare anti-reflection layer formed by applying the anti-glare anti-reflective coating composition of any one of claims 1 to 6 on one side or both sides of the substrate and then cured.
The anti-glare antireflection film according to claim 7, wherein the anti-glare antireflection film has a surface roughness Ra of 0.1 µm or more and 0.5 µm or less and an integrating sphere reflectance of 3% or less.
The anti-glare antireflection film of Claim 7 was provided, The polarizing plate characterized by the above-mentioned.
A display device comprising the anti-glare antireflection film of claim 7.