KR20130141967A - Anti-glare coating composition and anti-glare film using the same - Google Patents

Abstract

The present invention relates to an anti-glare coating composition and an anti-glare film using the same, and more specifically, to an anti-glare coating composition and an anti-glare film using the same, wherein the composition can provide improved anti-glare and anti-reflective effects using a small amount of light scattering particles by including light scattering particles having a core made of polymethyl (meta)acrylate polymer particles and a protrusion which is formed by attaching multiple polysilicon particles to the outside of the core.

Description

Anti-glare coating composition and anti-glare film using same {ANTI-GLARE COATING COMPOSITION AND ANTI-GLARE FILM USING THE SAME}

The present invention relates to a composition for anti-glare coating and an anti-glare film using the same, and more particularly, to an anti-glare coating composition comprising a light-scattering particle excellent in anti-glare properties and an anti-glare film using the same.

An anti-glare film is an optical film having a function of reducing light reflection by using light scattering due to surface irregularities. Various anti-glare films such as liquid crystal display (LCD), plasma display (PDP), and cathode ray tube (CRT) The organic light emitting diode EL is used for the purpose of preventing a decrease in contrast due to reflection of external light or a decrease in visibility of the display device due to image reflection.

The anti-glare film usually comprises an anti-glare layer formed of an anti-glare coating composition containing organic fine particles such as silica or polymer beads on a transparent substrate. Such translucent microparticles | fine-particles exhibit anti-glare property by scattering light on the surface. In this regard, Korean Patent Laid-Open No. 2011-97636 proposes an anti-glare hard coat layer containing spherical organic fine particles.

However, to date, an anti-glare film including various light scattering particles has been introduced, but there are limitations in improving anti-glare properties of such light-diffusing fine particles.

Patent Document 1: Korean Patent Publication No. 2011-97636

An object of the present invention is to provide an anti-glare coating composition excellent in anti-glare and anti-reflection effect and an anti-glare film using the same.

In addition, an object of the present invention is to provide an anti-glare coating composition and an anti-glare film using the same, even if using a smaller amount of light scattering particles than the prior art.

1. Composition for anti-glare coating comprising a light scattering particles having a core portion formed of polymethyl (meth) acrylate-based polymer particles and a protrusion formed by attaching a plurality of silicon polymer particles to the outer surface of the core portion.

2. In the above 1, the core particles and the projection particles are anti-glare coating composition is different from the refractive index.

3. In the above 2, the refractive index difference between the core particles and the protrusion particles is 0.03 or more composition for anti-glare coating.

4. In the above 1, the light-scattering particles have an average particle diameter of 1 to 10 ㎛ anti-glare anti-glare coating composition.

5. In the above 1, the average particle diameter of the protrusion particles is 0.1 to 1 ㎛ anti-glare coating composition.

6. In the above 1, the silicone polymer is a polysilsesquioxane anti-glare coating composition.

7. In the above 1, wherein the light scattering particles, the composition for anti-glare coating containing 0.1 to 30% by weight based on the total weight of the composition.

8. according to the above 1, the composition for anti-glare coating further comprising a polymerizable compound, a photopolymerization initiator and an organic solvent.

9. Base material; And surface irregularities formed by light scattering particles formed on the substrate, and having a core part formed of polymethyl (meth) acrylate-based polymer particles and a protrusion formed by attaching a plurality of silicon polymer particles to an outer surface of the core part. Anti-glare film comprising a glazing coating layer.

10. In the above 9, the anti-glare coating layer is an anti-glare film formed of the composition for anti-glare coating of any one of the above 1 to 8.

11. Polarizing plate with anti-glare film of the above 9.

12. Image display device provided with the polarizing plate of 11 above.

The anti-glare coating composition of the present invention may exhibit the same or better anti-glare and anti-reflection effects as in the prior art by using a light-scattering particle of the projection type than a conventional light scattering particles.

The light scattering particles according to the present invention are different from each other to form a core portion and a protrusion, and accordingly a difference in refractive index may occur, thereby further increasing the light scattering effect.

The anti-glare film of this invention can remarkably improve the antifouling property of an anti-glare coating layer by using the light-scattering particle which has a polymethyl (meth) acrylate type polymer core part and a silicone polymer protrusion.

1 is a schematic vertical cross-sectional view of light scattering particles according to the present invention.
Figure 2 is a schematic diagram of the light scattering of the conventional simple spherical particles (a) and the projections (b) according to the present invention.
3 is a schematic vertical cross-sectional view of the anti-glare film of the present invention.

The present invention includes a light scattering particle having a core portion formed of polymethyl (meth) acrylate-based polymer particles and a projection portion formed by attaching a plurality of silicon polymer particles to the outer surface of the core portion, thereby using a smaller amount of light scattering particles. Even if it relates to the anti-glare coating composition and the anti-glare film using the same that can produce the same or excellent anti-glare and anti-reflection effect as conventional.

Hereinafter, the present invention will be described in detail.

The anti-glare coating composition of the present invention is characterized in that it comprises a light scattering particles having a core portion formed of polymethyl (meth) acrylate-based polymer particles and a protrusion formed by attaching a plurality of silicon polymer particles to the outer surface of the core portion do.

1 is a schematic vertical cross-sectional view of light scattering particles 110 according to the present invention.

The light scattering particles 110 according to the present invention includes a core portion 111 and a protrusion 112.

The core part 111 may be made of a polymethyl (meth) acrylate-based polymer as transparent particles, preferably spherical particles. The protrusion part 112 is formed by attaching protrusion part particles formed of a transparent silicone resin to an outer surface of the core part 111. As the surface area of the light scattering particles 110 of the present invention is significantly expanded by the protrusions 112, the amount of light incident on the light scattering particles can be increased.

In addition, the protrusion 112 may maximize the light scattering effect by allowing the incident light to be scattered at various angles. Figure 2 schematically shows the incident light and reflected light of the conventional spherical particles (a) and the light scattering particles (b) having a projection according to the present invention. Referring to FIG. 2, it can be seen that the light scattering particles according to the present invention having protrusions than the conventional spherical particles have a wider and more varied degree of scattering of light.

In order to further enhance the light scattering properties of the light scattering particles 110 having the protrusions according to the present invention, the core 111 and the protrusion 112 preferably have different refractive indices. Such a difference in refractive index generates light reflection and refraction even at the interface between the core 111 and the protrusion 112, thereby inducing scattering of light more effectively. In this respect, the refractive index difference is preferably 0.03 or more.

The light scattering particles 110 of the present invention may be manufactured in various particle diameters according to a specific use. Typically, it may have an average particle diameter of 1 to 10 ㎛, but is not limited thereto. If the average particle diameter is less than 1㎛, sufficient scattering characteristics are difficult to be expressed, and whitening phenomenon may occur on the surface of the anti-glare coating layer, so that the resolution and transparency may be degraded. Although it is excellent to prevent, scintillation called surface glint occurs on the surface of the film, which may cause a problem of deterioration of the visibility of image information. In this case, the protrusion particles may have an average particle diameter of 0.1 to 1 μm, but are not limited thereto.

Light scattering particles 110 may be included in 0.1 to 30% by weight based on the total weight of the anti-glare coating composition, preferably 0.1 to 10% by weight. If the content is less than 0.1% by weight, the anti-glare may not be sufficiently exhibited, and it may be difficult to secure sufficient surface hardness of the anti-glare coating layer, and when the content is more than 30% by weight, the degree of scattering by the particles may be excessive, resulting in optical properties such as transparency and contrast. There may be a problem of poor physical properties.

Light scattering particles according to the present invention can be prepared according to one embodiment of the production method as follows.

The light scattering particles of the present invention may be prepared by using polymethyl (meth) acrylate-based polymer as core part particles, adsorbing silicon polymer fine particles on the surface of the core part particles, and forming protrusions on the surface thereof.

Silicone polymers are preferred as the protruding particles of the present invention because they have all the advantages of processability, toughness, price, etc. of polymer materials, heat resistance of inorganic materials, oxidation stability, and the like. In this respect, it is more preferable to use a polysilsesquioxane polymer.

As one embodiment of preparing the fine particles of the polysilsesquioxane polymer, a sol-gel method may be used in which an alkoxysilane is hydrolyzed and then polycondensed. After the sol-gel reaction, the acid catalyst may be neutralized with ammonia or the like to obtain a suspension in which fine particles of the polysilsesquioxane polymer are dispersed.

When the polymethyl (meth) acrylate polymer particles which are the core particle | grains are thrown into the said dispersion liquid, polysilsesquioxane microparticles | fine-particles adsorb | suck to a core particle | grain surface, and the projection light-scattering particle of this invention can be obtained.

The anti-glare coating composition of the present invention may include components used in the production of anti-glare film commonly used in the art, in addition to the light scattering particles described above. For example, it may further include a polymerizable compound, a photopolymerization initiator and an organic solvent.

The polymerizable compound is a component for forming the binder resin of the anti-glare coating layer and improving the surface hardness. The polymerizable compound may be a photopolymerizable (meth) acrylate oligomer, (meth) acrylate monomer or mixtures thereof known in the art. Can be used.

As a (meth) acrylate oligomer, For example, Polyester (meth) acrylate obtained by esterifying polyhydric alcohol, polyhydric carboxylic acid, and / or its anhydride, and acrylic acid; Urethane (meth) acrylates obtained by reacting polyhydric alcohols, polyvalent isocyanates and hydroxyl group-containing (meth) acrylates; Polysiloxane poly (meth) acrylates; Etc. can be used individually or in mixture of 2 or more types, respectively.

Examples of the (meth) acrylate monomers include 1 to 6 functional (meth) acrylate monomers known in the art. Specific examples of the (meth) acrylate monomers include methyl (meth) acrylate, allyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, isodecyl (meth) acrylate, and 2-dodecylthioethyl. (Meth) acrylate, octyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate , Isooctyl (meth) acrylate, stearyl (meth) acrylate, tetraperfuryl (meth) acrylate, isobornyl (meth) acrylate, phenoxyethyl (meth) acrylate, phenoxypropyl (meth) acryl Monofunctional monomers such as acrylate and phenoxybenzyl (meth) acrylate; 1,3-butanedioldi (meth) acrylate, 1,4-butanedioldi (meth) acrylate, 1,6-hexanedioldi (meth) acrylate, ethylene glycoldi (meth) acrylate, bisphenol A-ethylene Glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, dipropylene glycol di (Meth) acrylate, neopentyl glycol di (meth) acrylate, dicyclopentanyldi (meth) acrylate, caprolactone modified dicyclopentenyldi (meth) acrylate, ethylene oxide modified phosphoric acid di (meth) acrylate, Bis (2-hydroxyethyl) isocyanurate di (meth) acrylate, di (acryloxyethyl) isocyanurate, allylated cyclohexyldi (meth) acrylate, dimethyloldicyclopentanedi (meth) Methacrylate, ethylene oxide modified hexahydrophthalic acid di (meth) acrylate, tricyclodecane dimethanol (meth) acrylate, neopentyl glycol modified trimethylolpropanedi (meth) acrylate, adamantanedi (meth) acrylate, etc. Difunctional monomers of; (Meth) acrylate such as trimethylolpropane tri (meth) acrylate, dipentaerythritol tri (meth) acrylate, propionic acid modified dipentaerythritol tri (meth) acrylate, pentaerythritol tri Trifunctional monomers such as tri (meth) acrylate, tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate, tris (acryloxyethyl) isocyanurate, glycerol tri ; Tetrafunctional monomers such as diglycerin tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, and ditrimethylol propane tetra (meth) acrylate; Pentafunctional monomers such as dipentaerythritol penta (meth) acrylate and propionic acid-modified dipentaerythritol penta (meth) acrylate; Hexafunctional monomers, such as dipentaerythritol hexa (meth) acrylate and caprolactone modified dipentaerythritol hexa (meth) acrylate, etc. are mentioned. These can be used individually or in mixture of 2 or more types. In the present invention, (meth) acrylate is a term that refers to acrylate, methacrylate or both at the same time.

The (meth) acrylate monomer may be included in 10 to 90% by weight based on the total weight of the anti-glare coating composition, preferably 20 to 80% by weight. If the content is less than 10% by weight it is difficult to coat to the desired thickness, it may be difficult to secure sufficient surface hardness of the anti-glare coating layer, if it is more than 90% by weight the viscosity of the coating composition is increased to reduce the coating property and uniform surface irregularities Can be difficult to form.

The photopolymerization initiator is a component for improving the curing efficiency, and may be used without particular limitation as long as it is used in the art. For example, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzoin-n-butyl ether, benzoin isobutyl ether, acetophenone, hydroxydimethylacetophenone, dimethylaminoacetophenone, 3 -Methylacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxy-2-phenylacetophenone, 4-chronoacetophenone, 4,4-dimethoxyacetophenone, 2-hydride Hydroxy-2-methyl-1-phenylpropan-1-one, 2-hydroxy-2-methyl-1-phenyl-1-one, 1-hydroxycyclohexylphenylketone, 4-hydroxycyclophenylketone, 2 -Methyl-1- [4- (methylthio) phenyl] -2-morpholino-propane-1-one, 4- (2-hydroxyethoxy) phenyl-2- (hydroxy-2-propyl) ketone , Benzophenone, p-phenylbenzophenone, 4,4-diaminobenzophenone, 4,4'-diethylaminobenzophenone, dichlorobenzophenone, anthraquinone, 2-methylanthraquinone, 2-ethylanthraquinone, 2 -t-butylanthraquinone, 2-aminoanthraquinone, 2-meth Thioxanthone, 2-ethyl thioxanthone, 2-chloro thioxanthone, 2,4-dimethyl thioxanthone, 2,4-diethyl thioxanthone, benzyl dimethyl ketal, diphenyl ketone benzyl dimethyl ketal, acetophenone Dimethyl ketal, p-dimethylaminobenzoic acid ester, oligo [2-hydroxy-2-methyl-1- (4- (1-methylvinyl) phenyl) propanone], 2,4,6-trimethylbenzoyldiphenylphosphine Oxide, fluorene, triphenylamine, carbazole and the like. Moreover, as a commercially available product, brand names Darocur 1173, Igacure 184, Igacure 907, Igacure 1700 (Ciba company), etc. can also be used. These can be used individually or in mixture of 2 or more types.

The photopolymerization initiator may be included in an amount of 0.05 to 10 wt% based on the total weight of the antiglare coating composition. When the content is less than 0.05% by weight, the curing speed may be slow, and when the content is more than 10% by weight, cracks may occur in the anti-glare coating layer due to overcuring.

The organic solvent is a component which uniformly disperses / dissolves other components of the composition and maintains an appropriate viscosity, and may be used without particular limitation as long as it is known in the art. For example, an alcohol solvent, a ketone solvent, a hexane solvent, a benzene solvent, or the like may be used alone or in combination of two or more thereof.

Alcohol solvents include, for example, methanol, ethanol, isopropyl alcohol, butanol, hexanol, cyclohexanol, ethylene glycol, 2-methoxyethanol, 2-ethoxyethanol, methyl cellosolve, ethyl cellosolve, Propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, etc. are mentioned, These can be used individually or in mixture of 2 or more types.

Examples of the ketone solvents include methyl ethyl ketone, methyl butyl ketone, methyl isobutyl ketone, methyl amyl ketone, diethyl ketone, dipropyl ketone, acetone, cyclohexanone, and the like. It can be mixed and used.

Examples of the hexane solvents include hexane, heptane and octane, and these may be used alone or in combination of two or more thereof.

Benzene solvents include, for example, benzene, toluene, xylene, and the like, and these may be used alone or in combination of two or more thereof.

The organic solvent may be included in 10 to 90% by weight based on the total weight of the composition for anti-glare coating. If the content is less than 10% by weight, the viscosity may be high and workability may be lowered. If the content is more than 90% by weight, it may take a long time in the drying and curing process, thereby reducing economic efficiency.

The anti-glare coating composition of the present invention may further include one or more additives such as antioxidants, ultraviolet absorbers, light stabilizers, surfactants, leveling agents, lubricants, antifouling agents and the like, as necessary with the above components.

The present invention provides an anti-glare film using the composition for anti-glare coating.

One embodiment of the anti-glare film of the present invention is shown in FIG. 3.

Anti-glare film 10 of the present invention is a substrate 200; And a core part formed on the substrate 200 and having a core part formed of polymethyl (meth) acrylate-based polymer particles and a protrusion formed by attaching a plurality of silicon polymer particles to an outer surface of the core part. It characterized by including an anti-glare coating layer 100 is formed by the surface irregularities.

The base material 200 will not be specifically limited if it is a film excellent in transparency. Specifically, polyester-based resins such as polyethylene terephthalate, polyethylene isophthalate, polyethylene naphthalate, polybutylene terephthalate; Cellulose resins such as diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, isobutyl ester cellulose, propionyl cellulose, butyryl cellulose and acetyl propionyl cellulose; Polycarbonate resin; Acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene resins such as polystyrene and acrylonitrile-styrene copolymer; Polyolefin resins such as polyethylene, polypropylene, cycloolefin, or polyolefin having a norbornene structure, and an ethylene-propylene copolymer; Vinyl chloride resin; Amide resins such as nylon and aromatic polyamide; Imide resins such as polyetherimide and polyimide; Polyether sulfone type resin; Sulfone based resin; Polyether ketone resins; Polyether ether ketone resin; A sulfided polyphenylene resin; Ethylene-vinylacetate resins; Polyvinyl acetal resins; Polyvinyl alcohol-based resins; Vinylidene chloride resins; Vinyl butyral resin; Allylate series resin; Polyoxymethylene type resin; And films composed of thermoplastic resins such as epoxy resins. These may be unstretched, uniaxially or biaxially stretched films. Among them, a monoaxial or biaxially stretched polyester film having excellent transparency and heat resistance, and a triacetyl cellulose film having good transparency and no optical anisotropy are preferable.

The thickness of the substrate 200 is not particularly limited, and may be, for example, 8 to 1,000 μm, and preferably 40 to 100 μm.

The anti-glare coating layer 100 is a layer having anti-glare properties, and is a layer in which surface irregularities due to light scattering particles are formed on a surface which is not bonded to the substrate.

The formation method of the anti-glare coating layer 100 is not particularly limited. Specifically, it may be formed through a process of applying the composition for anti-glare coating on the substrate and drying and curing. The application may use known methods such as die coaters, air knives, meyer bars, reverse rolls, sprays, blades, casting, gravure, spin coating and the like. The coating thickness can be made more than 1 to 50 µm or less after drying. Drying may be carried out by volatilizing the volatile components for 1 second to 2 hours, preferably 5 seconds to 1 hour at a temperature of 30 to 150 ℃.

When drying is complete, ultraviolet rays are cured by irradiation. For curing, a high pressure mercury lamp, an electrodeless lamp, a xenon lamp, a metal halide lamp, or the like may be used, and the irradiation amount may be about 0.01 to 10 J / cm 2, preferably 0.1 to 2 J / cm 2.

The anti-glare film had an arithmetic mean surface roughness Ra of 0.05 µm ≤ Ra ≤ 0.3 µm, an average spacing Sm of surface irregularities of 30 µm ≤ Sm ≤ 100 µm, and an average inclination angle θa of surface irregularities. 0.5 ° ≦ θa ≦ 5 °. It can exhibit excellent anti-glare property in the above range.

The anti-glare film of the present invention having the configuration as described above may have the same or better anti-glare property and anti-reflection effect as in the prior art even when a small amount of light-scattering particles are included than the conventional ones, in particular, light-scattering particles Since the materials forming the core and the protrusions are different from each other, and thus a refractive index difference occurs, the light scattering effect may be further increased. In addition, the antifouling property of the anti-glare coating layer can be remarkably improved by using light scattering particles having a polymethyl (meth) acrylate polymer core portion and a silicon polymer protrusion.

The present invention provides a polarizing plate and an image display device provided with the anti-glare film.

The flat plate may have a conventional structure in which a polarizer protective film is laminated on at least one surface of the polarizer, and the anti-glare film is provided on at least one surface of the polarizing plate of this structure, that is, the polarizer or the polarizer protective film. do.

The polarizing plate provided with the anti-glare film may be provided in a manner embedded in the image display device or attached to the window surface.

Polarizing plate equipped with anti-glare film is an image display device such as reflective, transmissive and transflective liquid crystal display (LCD) and various driving methods such as TN type, STN type, OCB type, HAN type, VA type and IPS type. It can be preferably used for a liquid crystal display (LCD). In addition, the present invention can be preferably used for an image display device such as a plasma display device (PDP), a field emission device (FED), an organic light emitting diode device, an inorganic light emitting diode device, and an electronic paper.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be illustrative of the invention and are not intended to limit the scope of the claims. It will be apparent to those skilled in the art that such variations and modifications are within the scope of the appended claims.

Example

Example  One

(1) projection type Light scattering  Particle manufacturing

450 weight part of water and 15 weight part of hydrochloric acid of 5 weight% concentration were added to the reaction container provided with the thermometer, the reflux apparatus, and the stirrer to make a homogeneous solution. 770 weight part of methyl trimethoxysilane was added stirring this at room temperature, and the hydrolysis reaction advanced rapidly. After 5 minutes, the reaction temperature was raised to 70 ° C., whereby a clear reaction solution was obtained. After stirring the obtained reaction liquid sufficiently, stirring was stopped and it was left to stand for 24 hours.

After standing for 24 hours, the reaction solution became two layers of the liquid of the upper layer and the cohesive partial condensate of the lower layer. The container was tilted slowly to remove the supernatant, and then the supernatant was removed as much as possible using a pipette to obtain 510 parts by weight of the partial condensate of the lower layer. 400 parts by weight of this partial condensate was obtained and mixed well with 2200 parts by weight of methanol to obtain a partial condensate / methanol mixture.

The reaction vessel equipped with a thermometer, a reflux device and a stirrer was brought to a constant temperature of 25 ° C. while stirring 2600 parts by weight of the partial condensate / methanol mixture obtained at the process at 200 rpm, and then 3000 parts by weight of an aqueous 1% by weight aqueous ammonia solution was added quickly. did. Immediately after addition, polyorganosilsesquioxane fine particles were produced, yielding a white suspension.

Thereafter, polymethyl methacrylate (PMMA) particles having an average particle diameter of 3 μm were added to adsorb the silicon fine particles grown at 0.5 μm on the surface of the PMMA particles at room temperature, followed by filtration and drying to obtain powder of light scattering particles having protrusions on the surface. .

(2) coating composition preparation

Urethane acrylate (MU9800, Miwon Corporation) 16.5% by weight, mixed monomer (M340, Miwon Corporation) of pentaerythritol triacrylate and pentaerythritol tetraacrylate (12.2% by weight), previously prepared light scattering particles (core part particles: average Particle size 3.0 mu m, refractive index 1.495; protrusion particles: average particle diameter 0.5 mu m, refractive index 1.43) 4 wt%, methyl ethyl ketone 40 wt%, ethyl acetate 25 wt% photoinitiator 1-hydroxycyclohexylphenyl ketone (I-184, Ciba G) 2 wt% and silicone modified oil (BYK-378, BYK Co., Ltd.) as an additive was mixed for 1 hour to prepare an anti-glare antireflective coating composition.

(3) film manufacturing

After coating the coating composition prepared in (1) on one side of the triacetyl cellulose (TAC) film having a thickness of 80㎛ using a Meyer bar to apply a thickness of 3.5㎛ and dried at 80 ℃ for 1 minute. Subsequently, an anti-glare antireflection film was prepared by irradiating ultraviolet rays with an irradiation dose of 500 mJ / cm 2 to form an anti-glare antireflection layer.

Example  2-4, Comparative Example  1-4

The same procedure as in Example 1, except that the ingredients and contents of Table 1 were used. At this time, the content is% by weight.

Test Example

Physical properties of the anti-glare antireflection film prepared in Examples and Comparative Examples were measured by the following method, and the results are shown in Table 2 below.

1.transmittance (%), Hayes

The total transmittance and total haze value Ha were measured by using a spectrophotometer (HZ-1, Suga, Japan) with the TAC plane facing the light source D65.

2. pencil hardness

The pencil hardness was measured by applying a 500g load to the prepared anti-glare film surface, that is, the anti-glare anti-reflective layer using a pencil hardness tester (PHT, Seokbo Science Co., Ltd.). The pencil used Mitsubishi Corporation, and measured five times per pencil hardness. If there were two or more scratches, it was determined to be defective, and pencil hardness was indicated by a pencil before the failure occurred.

0-1 scratches: OK

2 or more scratches: NG

3. Surface Roughness

The prepared anti-glare antireflection film was bonded to glass using a transparent optical pressure-sensitive adhesive to prepare a bonded body. Using a surface roughness measuring instrument (SE4000, manufactured by Kosaka Research Institute) with a measuring range of 1.5 mm and a measuring speed of 0.1 mm / sec, the arithmetic mean surface roughness (Ra, μm) and the average spacing Sm of the unevenness in accordance with JIS B 0601-1994 Μm) and average tilt angles (θa, °) were measured.

4. fluorescent tube Reflection

After the prepared anti-glare antireflection film was bonded to a black acrylic plate, the presence or absence of anti-glare was confirmed through reflection visibility of fluorescent lamps.

5. Antifouling property

(1) male contact angle

After dropping water droplets onto the film surface at room temperature (25 ° C.), a contact angle measuring device (CAM100, KSV) was used one minute later to measure the contact angle to the water droplets. The contact angle was measured 5 times with the same sample to the left and right contact angle of the water droplets and used the average value.

(2) oleic acid-contact angle

After dropping oleic acid on the film surface at room temperature (25 ° C.), the contact angle with respect to oleic acid was measured after 1 minute using a contact angle measuring device (CAM100, KSV). The contact angle was measured 5 times with the same sample of the left and right contact angle of the oleic acid and used the average value.

Referring to Table 2, it can be seen that the embodiments are all excellent in the fluorescent light reflectivity.

Specifically, when comparing the Examples and Comparative Examples each containing the light diffusing particles in the same content, it can be seen that the overall haze value is higher than the Comparative Example, the surface roughness (Ra) and the inclination angle (θa) is also Comparative Example As it turns out that an Example is higher, it turns out that the anti-glare property and anti-reflective effect of the anti-glare film of this invention are excellent.

In addition, it can be seen that the water-contact angle and the oleic acid-contact angle of the embodiment of the present invention are significantly larger than those of the comparative example, from which it can be seen that the anti-glare film of the examples has excellent antifouling properties.

10: anti-glare film
100: anti-glare coating 200: base film
110: light scattering particles
111: core portion 112: protrusion

Claims (12)

A composition for anti-glare coating comprising a light scattering particles having a core portion formed of polymethyl (meth) acrylate-based polymer particles and a protrusion formed by attaching a plurality of silicon polymer particles to an outer surface of the core portion.
The anti-glare coating composition according to claim 1, wherein the core particles and the projection particles have different refractive indices.
The anti-glare coating composition according to claim 2, wherein a difference in refractive index between the core particles and the protrusion particles is 0.03 or more.
The composition for anti-glare anti-glare coating according to claim 1, wherein the average particle diameter of the light scattering particles is 1 to 10 µm.
The composition for anti-glare coating according to claim 1, wherein the average particle diameter of the protrusion particles is 0.1 to 1 µm.
The composition for anti-glare coating of claim 1, wherein the silicone polymer is polysilsesquioxane.
The composition of claim 1, wherein the light scattering particles are present in an amount of 0.1 to 30 wt% based on the total weight of the composition.
The anti-glare coating composition according to claim 1, further comprising a polymerizable compound, a photopolymerization initiator, and an organic solvent.
materials; And
Anti-glare with surface irregularities formed by light scattering particles formed on the substrate and having a core portion formed of polymethyl (meth) acrylate-based polymer particles and a protrusion formed by attaching a plurality of silicon polymer particles to an outer surface of the core portion. Anti-glare film comprising a coating layer.
The anti-glare film of claim 9, wherein the anti-glare coating layer is formed of the composition for anti-glare coating of any one of claims 1 to 8.
The polarizing plate provided with the anti-glare film of Claim 9.
An image display device provided with the polarizing plate of claim 11.

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