KR101559186B1 - Optical laminate, polarizing plate, and display apparatus using the same - Google Patents

Abstract

assignment
And an object of the present invention is to provide an optical laminate, a polarizing plate, and a display device using the same, which has a one-layer structure and has excellent antistatic properties and is excellent in light resistance, saponification resistance and scratch resistance.
Solution
Wherein at least an optical functional layer containing at least a conductive material is provided on the light transmitting substrate directly or through another layer, wherein the surface resistivity of the surface of the optical laminate after the carbon arc light resistance test is not more than 1.0 x 10 < ¹² & (R2 / R1: R1 = surface resistivity before carbon arc type light resistance test, R2 = surface resistivity after carbon arc light resistance test) of 10 ⁴ or less in the carbon arc type light resistance test before and after the carbon arc light resistance test Laminates.

Description

TECHNICAL FIELD [0001] The present invention relates to an optical laminate, a polarizing plate, and a display using the same. BACKGROUND OF THE INVENTION [0001]

The present invention relates to an optical laminate, a polarizing plate and a display device using the same.

2. Description of the Related Art Image display devices such as a liquid crystal display (LCD), a cathode ray tube (CRT) display, a projection display, a plasma display (PDP), and an electroluminescence display can be classified into an indoor lighting such as a fluorescent lamp, The visibility of the image is disturbed by the reflection of the shadow or the like. It is also required that the image display surface is provided with scratch resistance so as not to cause scratches during handling. Therefore, on such a display surface, an antiglare layer or a hard layer formed by diffusing surface reflected light in order to improve the visibility of an image and forming a micro concavo-convex structure capable of preventing the reflection of external environment by suppressing regular reflection of external light An optical laminate having an optical function layer such as a coat layer is provided on the outermost surface.

These optical laminated bodies are provided with a one-layer antireflection layer on which a micro concavo-convex structure is formed on a light transmitting substrate such as polyethylene terephthalate (hereinafter referred to as "PET") or triacetyl cellulose (hereinafter referred to as "TAC" Or a laminate of a low refractive index layer on a light diffusion layer is generally manufactured and sold, and the development of an optical laminate that provides a desired function by combination of layer structures is underway.

The optical function layer is formed with desired properties. For example, the optical laminate having the hard coat property of the optical function layer can be used as a hard coat film having the hard coat layer. The optical laminate in which the fine concavo-convex structure is formed on the surface of the optical function layer can be used as a hard coat film and can also be used as an antiglare film having an antiglare layer. In addition, a light-diffusing layer or a low-refractive index layer may be used as the optical functional layer. Development of an optical laminate having desired functions by using an optical function layer such as a hard coat layer or an antiglare layer as a single layer or combining a plurality of layers has been under development.

There is a problem such as adhesion of dust due to static electricity and inconvenience of liquid crystal display operation to the outermost surface (observation surface side) of the display, and an optical laminate having an antistatic function is required. Particularly, there is a tendency that dust adhesion is conspicuous with high contrast of a display, and an optical laminate having an antistatic function is required.

In addition, difficult handling (load due to physical, mechanical, chemical stimulation, etc.) is expected for the outermost surface (observation surface side) of the display. For example, contamination of dust or fingerprints attached to the display surface can be prevented by using a glass cleaner , Organic solvents, and the like) to be wiped with a rag soaking. For this reason, it is required to improve the antifouling property on the surface of the hard coat film mounted on the display.

As antistatic antiglare films having an antistatic function, it has been proposed that a transparent conductive layer and an antiglare layer are sequentially laminated on a transparent base film (see, for example, Patent Document 1).

In order to impart antistatic properties, an antistatic antiglare film having a one-layer structure can be obtained by applying a resin layer containing a quartenary ammonium salt compound and imparting light-shielding properties to the light-transmitting fine particles (for example, Patent Documents 2 and 3).

Further, an optical laminate using an organic conductive material such as polyaniline or polythiophene as a conductive material has been proposed. Since the organic conductive material has a lower light resistance than the inorganic material, the antistatic performance can not be maintained, and thus an improvement is required. Here, in order to improve the light resistance, a method of mixing with a resin having a high glass transition point has been proposed (for example, Patent Document 4).

A hard coat layer comprising a metal oxide such as antimony oxide having a particle diameter of 100 nm or less and a compound having three or more acrylic groups in the molecule and an acrylic compound containing a fluorine atom in the molecule is coated on the substrate made of a triacetyl cellulose film (For example, refer to Patent Document 5).

Japanese Patent Application Laid-Open No. 2002-254573 WO2007 / 032170 Japanese Patent Application Laid-Open No. 2009-66891 Japanese Patent Application Laid-Open No. 2008-181120 Japanese Patent No. 4221990

Antistatic performance is demanded in the optical laminate used in displays. Here, light resistance is required to such an extent that the antistatic property is not changed by light such as sunlight so as to withstand use for outdoor purposes. In addition, when the polarizing plate and the triacetylcellulose-based protective film are laminated, the protective film of the polarizing plate used in the display is usually subjected to treatment such as saponification to improve the adhesion between the polarizing plate and the protective film. For this reason, the optical functional layer or the optical laminate laminated on the triacetyl cellulose-based protective film is required to have an anti-saponification property such that the antistatic property does not change.

As an antistatic antiglare film having an antistatic function as in Patent Document 1, a transparent conductive layer and an antiglare layer are sequentially laminated on a transparent substrate film. However, in this structure, antistatic property and antistatic property are excellent, There is a problem that the cost is increased.

In order to provide antistatic properties as in Patent Documents 2 and 3, a quaternary ammonium salt compound is contained and a resin layer to which light-transmitting fine particles are added for imparting antifogging property is applied to form a single layer of a transparent substrate film A laminate can be obtained. However, in this structure, there arises a problem that the conductivity is lowered by the saponification treatment.

In an optical laminate using a conductive polymer such as polyaniline or polythiophene, since the organic conductive material is inferior in light resistance to an inorganic material, antistatic performance can not be maintained, and improvement is required. Here, as in Patent Document 4, a method of mixing with a resin having a high glass transition point has been proposed for improving the light resistance. However, since the resin having a high glass transition point has low hardness, the surface hardness is low and the scratch resistance is low There is a problem.

The antistatic hard coat film described in Patent Document 5 is excellent in antistatic property and scratch resistance. However, although this antistatic hard coat film contains a fluorine material for controlling the refractive index, sufficient antifouling property can not be obtained, and when the saponification treatment is applied, the fluorine material in the hard coat layer elutes and the antifouling property is lowered. That is, it has been required to improve the antifouling property after the saponification treatment.

In view of the above phenomenon, it is an object of the present invention to provide an optical laminate, a polarizing plate, and a display device using the same, which has excellent antistatic performance in a one-layer structure and is excellent in light resistance, abrasion resistance and scratch resistance.

Another object of the present invention is to provide an optical laminate and a polarizing plate and a display device using the same, which are less likely to lower antistatic properties and antifouling properties even when saponification treatment is performed by developing antistatic properties and antifouling properties.

The present invention has been accomplished on the basis of the following technical constitution.

(1) An optical laminate provided with at least an optical function layer containing at least a conductive material directly or through another layer on a light-transmissive base, wherein the surface resistivity of the surface of the optical laminate after the carbon arc light resistance test is 1.0 10 ¹² ? / □ or less, and a carbon arc light resistance test before and after the ratio of the surface resistivity; characterized in that the 10: ⁴ or less (R2 / R1 R1 = carbon arc light resistance test prior to surface resistivity, R2 = a carbon arc light resistance the surface resistivity after the test) .

(2) The optical laminate according to the above (1), wherein the saturation voltage after the carbon arc light resistance test is 1.5 kV or less.

(3) The optical laminate according to the above item (1) or (2), wherein the optical functional layer contains at least one of a resin component and a light-transmitting fine particle or an inorganic component capable of forming a concavo-convex structure by aggregation.

(4) The optical laminate according to any one of (1) to (3), wherein the optically functional layer contains an ionizing radiation curable fluorinated acrylate.

(5) The optical functional layer is a layer obtained by curing a composition containing at least an ionizing radiation curable fluorinated acrylate and a conductive metal oxide,

The optical laminate according to (4) above, wherein the ionizing radiation curable fluorinated acrylate has a molecular weight of 1,000 or more and further contains 3 or more acryloyl groups.

(6) The optical laminate according to the above (5), wherein the ionizing radiation-curable fluorinated acrylate contains a perfluoroalkyl group.

(7) The optical laminate according to the above (5) or (6), wherein the content of fluorine atoms in the ionizing radiation-curable fluorinated acrylate is 20% or more.

(8) The optical laminate according to any one of items (5) to (7) above, wherein the ionizing radiation-curable fluorinated acrylate is a compound represented by the following formula (A).

Wherein Cy is a cycloalkyl moiety of a 5 or 6 membered ring in which a part of the hydrogen is substituted by a substituent of the above formula and optionally a methyl group or an ethyl group, a is an integer of 1 to 3, X is a methylene group or a direct bond , R _F is a perfluoroalkyl group having 4 to 9 carbon atoms, and n is an integer of 1 to 3. However, when a is 2 or more, X, R _F , and n are independently selected from each other.

(9) The optical laminate according to any one of items (5) to (8) above, wherein the ionizing radiation-curable fluorinated acrylate is urethane acrylate.

(10) The optical laminate according to any one of (1) to (9) above, wherein the optically functional layer contains a complex of a? -Conjugate-based conductive polymer and a polymeric impurity.

(11) The optical laminate according to any one of (1) to (10), wherein the surface resistivity after the saponification treatment is not more than 1.0 × 10 ¹⁰ Ω / □.

(12) A polarizing plate characterized in that the optical laminate according to any one of the above items (1) to (11) is laminated on a polarizing body.

(13) A display device comprising the optical laminate according to any one of (1) to (6).

According to the present invention (1) to (13), it is possible to provide an optical laminate, a polarizing plate, and a display device using the same, which has excellent antistatic performance in a one-layer structure and is excellent in light resistance, abrasion resistance and scratch resistance .

According to the inventions (5), (12), and (13), the antistatic property and the antifouling property are not reduced even when the saponification treatment is performed by developing the antistatic property and the antifouling property, A polarizing plate and a display device can be obtained.

According to the present invention (6) or (7), an effect that sufficiently fluorine atoms can be introduced is exhibited.

According to the present invention (8), since the number of n in the perfluoroalkyl group (-C _n F _{2n + 1} ) is in the range of 4 to 9, molecular chains containing fluorine are gathered to form a crystal structure, There is generated an effect of preventing the function of the conductive metal oxide from being disturbed by the occurrence of the portion exposed by the conductive metal oxide.

According to the present invention (9), film formability is improved, and scratch resistance, stretchability and flexibility of the cured product are improved.

According to the present invention (3), the light-transmitting fine particles form irregularities on the surface, scattering light, or scattering light in the optical function layer, thereby exhibiting the effect of being used as an antiglare film.

1 is a cross-sectional view of an optical laminate.

The optical laminate of this embodiment has a basic constitution in which an optical function layer containing a resin component and a conductive material is laminated on a translucent base. By adding light-transmitting fine particles or an inorganic component capable of forming irregularities by agglomeration as a material for forming the optical function layer, it is possible to provide an optical functional layer having additional anti-glare properties.

Here, the optical function layer may be laminated directly or through another layer to the light-transmitting substrate, and may be laminated on one surface of the light-transmitting substrate or on both surfaces thereof. Further, the optical laminate may have another layer. Here, the other layers include, for example, a light diffusion layer, an antifouling layer, a polarizing gas, a low reflection layer, another function imparting layer (for example, an antistatic layer, an ultraviolet / near infrared (NIR) absorption layer, , Hard coat layer). The position of the other layer is, for example, on the transparent substrate opposite to the optical functional layer in the case of a polarizing gas, on the optical functional layer in the case of a low reflective layer, The lower layer of the optical functional layer. A stacked body in which a polarizing gas, a light-transmitting substrate and an optical functional layer are sequentially laminated can be used as a polarizing plate. Hereinafter, the respective constituent elements (light-transmitting substrate, resin component, etc.) of the optical laminate according to the presently preferred embodiment will be described in detail.

<Transmissive Gas>

The translucent substrate according to the present preferred embodiment is not particularly limited as far as it is transmissive. Glasses such as quartz glass and soda glass can also be used. However, polyethylene terephthalate (PET), triacetylcellulose (TAC), polyethylene naphthalate (PM), polycarbonate (PC), polyimide (PI), polyethylene (PE), polypropylene (PP), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), cycloolefin copolymer (COC), norbornene resin, polyether sulfone, cellophane, aromatic polyamide and the like can be preferably used. These films may be either non-drawn or stretched. In particular, a biaxially stretched polyethylene terephthalate film is preferable from the viewpoint of excellent mechanical strength and dimensional stability, and triacetyl cellulose (TAC) which is a non-tear film is preferable in that the phase difference in the film plane is very small. When used for PDPs and LCDs, these PET and TAC films are more preferable.

The transparency of these translucent substrates is better as the transparency is better, but it is preferably 80% or more, more preferably 90% or more as the total light transmittance (JIS K7105). The thickness of the light transmitting substrate is preferably thin from the viewpoint of weight saving, but it is preferable that the thickness is in the range of 1 to 700 占 퐉, preferably 20 to 250 占 퐉, in consideration of productivity and handleability. When the optical laminate of the present invention is used for an LCD application, it is preferable to use TAC of 20 to 80 mu m as a light transmitting substrate. In the optical laminate of the present invention, curl can be prevented particularly when TAC of 20 to 80 占 퐉 is used as the light transmitting substrate, and therefore, it can be preferably used for an LCD application requiring thinness and weight reduction.

Treatment of the surface of the light-transmitting substrate with a treatment such as alkali treatment, corona treatment, plasma treatment, sputter treatment, primer coating such as a surfactant, silane coupling agent, or the like, thin film dry coating such as Si deposition, The scratch resistance, the physical strength, and the chemical resistance of the optical function layer can be improved. In addition, even when another layer is provided between the light-transmitting substrate and the optical function layer, the physical strength and chemical resistance of the optical function layer can be improved by improving the adhesion of each interface by the same method as described above.

<Optical Function Layer>

The optical function layer contains a resin component and a conductive material, and is formed by curing the resin component. It is preferable that the optically functional layer is provided with a light-shielding fine particle or an inorganic component capable of forming concavo-convex structure by agglomeration in addition to the resin component and the conductive material, so that the optical function layer is further provided with antifogging property.

[Resin component]

As the resin component constituting the optical functional layer, a resin having sufficient strength as a film after curing and having transparency can be used without particular limitation. Examples of the resin component include a thermosetting resin, a thermosetting resin, an ionizing radiation-curing resin, a two-liquid mixing resin and the like. Among them, the resin component can be effectively cured by a simple and easy processing operation in the curing treatment by electron beam or ultraviolet ray irradiation Is preferably an ionizing radiation curable resin.

Examples of the ionizing radiation curable resin include a resin having a radically polymerizable functional group such as an acryloyl group, a methacryloyl group, an acryloyloxy group, a methacryloyloxy group, or the like having a cationic polymerizable functional group such as an epoxy group, a vinyl ether group and an oxetane group A monomer, an oligomer and a prepolymer may be used alone or in a suitable mixture. Examples of the monomer include methyl acrylate, methyl methacrylate, methoxypolyethylene methacrylate, cyclohexyl methacrylate, phenoxyethyl methacrylate, ethylene glycol dimethacrylate, dipentaerythritol hexaacrylate, trimethylolpropane Trimethacrylate, pentaerythritol triacrylate, and the like. Examples of the oligomer and prepolymer include acrylate compounds such as polyester acrylate, polyurethane acrylate, polyfunctional urethane acrylate, epoxy acrylate, polyether acrylate, alkyd acrylate, melamine acrylate and silicone acrylate, unsaturated poly Epoxy compounds such as ester, tetramethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, bisphenol A diglycidyl ether and various alicyclic epoxies, 3-ethyl- (3-ethyl-3-oxetanyl) methoxy] methyl} benzene, di [1-ethyl (3-oxetanyl)] methyl ether, etc. Oxetane compounds. These may be used singly or in combination.

A multifunctional monomer or polyfunctional urethane acrylate having three or more (meth) acryloyloxy groups among these ionizing radiation curable resins can increase the curing rate or improve the hardness of the cured product. In addition, when used in combination with a conductive material, since the conductive material is fixed in the highly crosslinked molecular chain, problems such as detachment of the conductive material component by saponification treatment and light resistance test are less likely to occur, There is an effect that the lowering of the antistatic property by the light resistance test is hardly caused.

In addition, when a polyfunctional urethane acrylate is used, hardness and flexibility of the cured product can be imparted, and the effect of raising the viscosity at the time of making the coating material can be imparted, so that the film formability can be improved.

The proportion of the ionizing radiation curable resin contained in the optically functional layer is not particularly limited, but is preferably 20 to 80% by weight, more preferably 30 to 70% by weight, based on 100 parts by weight of the resin composition.

The ionizing radiation for curing the resin composition may be ultraviolet rays, visible rays, infrared rays, or electron beams. Such radiation may be polarized light or non-polarized light. In particular, ultraviolet rays are preferable from the viewpoints of equipment cost, safety, driving cost, and the like. As an energy source of ultraviolet rays, for example, a high pressure mercury lamp, a halogen lamp, a xenon lamp, a metal halide lamp, a nitrogen laser, an electron beam accelerator, a radioactive element and the like are preferable. The irradiation dose of the energy source is preferably in the range of 100 to 5,000 mJ / cm2, more preferably 300 to 3,000 mJ / cm2, in terms of the integrated exposure dose at ultraviolet wavelength 365 nm. If it is less than 100 mJ / cm &lt; 2 &gt;, the hardness of the optical functional layer may decrease because the curing becomes insufficient. If it exceeds 5,000 mJ / cm &lt; 2 &gt;, the optical functional layer becomes colored and transparency deteriorates.

Ionizing radiation-curable fluorinated acrylate can be used as the ionizing radiation curable resin. The ionizing radiation-curable fluorinated acrylate is ionizing radiation curing type as compared with other fluorinated acrylates, and since the crosslinking between molecules takes place, the chemical resistance is excellent and the effect of exhibiting sufficient antifouling property even after the saponification treatment is exhibited.

When the ionizing radiation-curable fluorinated acrylate is used in combination with the conductive material, there arises a problem that the fluorine component of the fluorinated acrylate is unevenly distributed in the vicinity of the surface layer of the optical functional layer, and the conductive material component is eliminated by the saponification treatment and the light resistance test The effect of lowering the antistatic property by the saponification treatment and the lowering of the antistatic property by the light resistance test are less likely to occur. Here, the &quot; surface layer &quot; will be described with reference to Fig. Fig. 1 is an optical laminate 1 in which an optical functional layer 20 is laminated on a light transmitting base 10. In Fig. 1, an antiglare layer is described as an example of the optical function layer. An optical laminate having an antiglare layer as an optical functional layer is preferable because it can be used as an antiglare film having antifogging properties. The surface side where the distance of the optical function layer 20 is away from the light transmitting substrate 10 is the surface layer 21.

Here, when the fluorine-based surfactant is used in place of the ionizing radiation-curable fluoroacrylate, (1) the fluorine component excessively bleeds out to the surface to deteriorate the function of the conductive agent, (2) the fluorine- There is a problem that components are dropped during the saponification treatment because of not being an ionizing radiation curable type, and the conductive component is also dropped off and the antistatic property is lost.

Examples of the ionizing radiation curable fluorinated acrylate include 2- (perfluoro decyl) ethyl methacrylate, 2- (perfluoro-7-methyloctyl) ethyl methacrylate, 3- (perfluoro- (Perfluoro-9-methyldecyl) ethyl methacrylate, 3- (perfluoro-8-methyldecyl) -2-hydroxypropyl methacrylate, 2- (Perfluorohexyl) ethyl acrylate, 2- (perfluoro-9-methyldecyl) ethyl acrylate, pentadecafluoro (Meth) acrylate, octafluoropentyl (meth) acrylate, pentafluoropentyl (meth) acrylate, nonafluorobutyl (meth) acrylate, Fluoropropyl (meth) acrylate, trifluoro (meth) acrylate, trifluoro Isopropyl (meth) acrylate, can be used (meth) acrylate, the following compounds (ⅰ) ~ (ⅹⅹⅹ) such as trifluoromethyl. In addition, the following compounds are all acrylates, and the acryloyl groups in the formulas can all be changed to methacryloyl groups.

These may be used singly or in combination. The urethane acrylate containing a fluorinated alkyl group having a urethane bond in the fluorinated acrylate is more preferable in terms of scratch resistance, stretching and flexibility of the cured product. Among the fluorinated acrylates, polyfunctional acrylates are preferred. The term "polyfunctional acrylate" as used herein means having two or more (preferably three or more, more preferably four or more) (meth) acryloyloxy groups.

The ionizing radiation curable resin can be cured by electron beam irradiation as it is, but the radiation used may be ultraviolet rays, visible rays, infrared rays, or electron beams. These radiation may be polarized or non-polarized.

In the case of performing curing by ultraviolet irradiation, it is necessary to add a photopolymerization initiator. As the photopolymerization initiator, conventionally known ones can be used. For example, benzoin such as benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, N, N, N, N-tetramethyl-4,4'-diaminobenzophenone, Phosphorus and its alkyl ethers; Acetophenone such as acetophenone, 3-methylacetophenone, 4-chlorobenzophenone, 4,4'-dimethoxybenzophenone, 2,2-dimethoxy-2-phenylacetophenone and 1-hydroxycyclohexyl phenyl ketone Currents; Anthraquinones such as methyl anthraquinone, 2-ethyl anthraquinone, and 2-amylanthraquinone; Xanthone; Thioxanthones such as thioxanthone, 2,4-diethylthioxanthone and 2,4-diisopropylthioxanthone; Ketal such as acetophenone dimethyl ketal and benzyl dimethyl ketal; Benzophenones such as benzophenone and 4,4-bismethylaminobenzophenone; And other 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one. These may be used alone or in a mixture of two or more. The amount of the photopolymerization initiator to be used is preferably 5% or less, more preferably 1 to 4%, based on the total solid content of the radiation curable resin composition.

Additives such as a leveling agent, a thickener, an antistatic agent, a filler, and an extender pigment may be contained in the ionizing radiation curable resin. For example, the leveling agent has a function of uniformizing the tension of the coating film surface and correcting defects before forming the coating film, and a material having both an interfacial tension and a surface tension lower than those of the ionizing radiation curable resin is used.

The amount of the resin component such as the ionizing radiation curable resin is preferably 50 wt% or more, more preferably 60 wt% or more, based on the total weight of the solid component in the resin composition constituting the optical functional layer. The upper limit value is not particularly limited, but is, for example, 99.6% by weight. If it is less than 50% by weight, sufficient hardness can not be obtained.

The solid content of resin components such as ionizing radiation curable resin includes all the solid components other than the inorganic components to be described later, and includes not only solid components of resin components such as ionizing radiation curable resins but also solid components of other optional components.

[Conductive material]

The optically functional layer of the present invention includes a conductive material. Dust adhesion on the surface of the optical laminate can be effectively prevented by the addition of the conductive material. Specific examples of the conductive material include various cationic compounds having a cationic group such as quaternary ammonium salts, pyridinium salts and primary to tertiary amino groups, anions such as sulfonic acid bases, sulfuric acid ester bases, phosphoric acid ester bases and phosphonic acid bases Amphoteric compounds such as anionic compounds having anionic groups, amino acid-based compounds and amino-sulphate ester compounds, nonionic compounds such as amino alcohol-based compounds, glycerin-based compounds and polyethylene glycol-based compounds, organometallic compounds such as alkoxides of tin and titanium, A metal chelate compound such as an acetylacetonate salt thereof, and a compound obtained by high-molecular weight compound as described above. Also, a polymerizable compound having a tertiary amino group, a quaternary ammonium group or a metal chelating portion and an organometallic compound such as a monomer capable of being polymerized by ionizing radiation or an oligomer or a coupling agent having a functional group can also be used as an antistatic agent have.

Also, conductive fine particles can be mentioned. Specific examples of the conductive fine particles include a metal oxide (hereinafter also referred to as a conductive metal oxide). Examples of such conductive metal oxides include indium tin oxide, In ₂ O ₃ , Al ₂ O ₃ , and the like, which are often referred to as ZnO, CeO ₂ , Sb ₂ O ₂ , Sb ₂ O ₃ , Sb ₂ O ₅ , SnO ₂ , , Antimony doped tin oxide (abbreviated as ATO), and aluminum-doped zinc oxide (abbreviated as AZO). The conductive metal oxide is not particularly limited, and examples thereof include indium tin oxide, antimony doped tin oxide (ATO), zinc antimonate, and antimony oxide. As the conductive metal oxide, one type may be selected, or two or more types may be used in combination. Of these, antimony doped tin oxide is particularly preferable. The term &quot; fine particles &quot; refers to particles having a submicron size of 1 mu m or less, and preferably has an average particle diameter of 0.1 nm to 0.1 mu m. The average particle diameter of the conductive metal oxide is not particularly limited, but is preferably from 2 to 30 nm, more preferably from 5 to 25 nm. The average particle diameter is measured by a transmission electron microscope (TEM) to measure the particle diameter of the primary particles with respect to 100 particles, and the average value is obtained. By using the conductive metal oxide having such a particle diameter, it is possible to obtain an effect that the coloring by the conductive metal oxide is suppressed. The proportion of the conductive metal oxide contained in the optically functional layer is not particularly limited, but is preferably 1 to 40% by weight, more preferably 3 to 35% by weight, and still more preferably 5 to 20% by weight in 100 parts by weight of the resin composition Do. If it is less than 1% by weight, the antistatic property tends to become insufficient. If it exceeds 40% by weight, the optical function layer tends to be colored or the transparency of the optical function layer tends to decrease.

Another specific example of the conductive material is a? -Conjugated conductive polymer. The? -conjugated conductive polymer is not particularly limited as long as it is a polymer having a main chain of the? -conjugated system. Examples of the? -conjugated conductive polymer include polyacetylene, polyacene, polyazylene, polyphenylene as an aromatic conjugated system, polypyrrole as a heterocyclic conjugated system, Polyaniline, polythienylenevinylene, poly (phenylene vinylene), which is a mixed conjugated system, and conjugated type conjugated type conjugated system having a plurality of conjugated chains in the molecule, such as polythiophene, polyisothianaphthene, And derivatives of these conductive polymers, and conductive complexes, which are polymers obtained by grafting or block copolymerizing these conjugated polymer chains with a saturated polymer. Among them, conjugated conductive polymers such as polythiophene, polyaniline and polypyrrole are more preferably used. By using the? -Conjugated conductive polymer, it is possible to exhibit excellent antistatic performance, to increase the total light transmittance of the optical laminate, and to reduce the haze value. An anion such as an organic sulfonic acid or a ferric chloride may be added as an impurity (electron donor) for the purpose of improving the conductivity and improving the antistatic property, and used as a complex. In consideration of the effect of adding an impurity, in particular, a complex of a? -Conjugated conductive polymer and a polymeric impurity is preferable because of its high transparency and antistatic property.

The polystyrene sulfonic acid doped poly (3,4-ethylenedioxythiophene) (abbreviated as PEDOT-PSS) as a complex of the? -conjugated conductive polymer and the polymer impurity has a relatively high thermal stability and is advantageous in transparency after the film formation desirable.

The conductive material is contained in an amount of preferably 0.3 to 20.0% by weight based on the total weight of the solid component in the resin composition, and particularly preferably 0.5 to 15.0% by weight. When the blending amount of the conductive material is less than 0.3% by weight, antistatic properties are difficult to manifest. If the blending amount of the conductive material is more than 20 wt%, the transparency may be impaired.

Here, when a composite of a? -Conjugated conductive polymer and a polymer impurity is mixed with an ionizing radiation curable resin and cured by radiation, the composite is uniformly dispersed in the optical functional layer (in-plane and depth directions) It is difficult to lower the antistatic property caused by the antistatic agent. In addition, as the ionizing radiation curable resin, monomers or oligomers having 3 or more (more preferably 4, and more preferably 5 or more) (meth) acryloyloxy groups in one molecule, prepolymers such as polyfunctional acrylates , A polyfunctional urethane acrylate or a polyfunctional acrylate is used in combination, a composite of the? -Conjugated system conductive polymer and the polymer impurity is fixed in the clearance between the molecules of the resin component strongly crosslinked after the radiation curing, It is difficult to lower the antistatic property by the light resistance test. Furthermore, the composite of the? -Conjugated conductive polymer and the polymer impurity does not omnipresent near the surface layer of the optical functional layer and is appropriately dispersed in the thickness direction, thereby suppressing the decrease of the antistatic property by the light resistance test.

The composite of the? -Conjugated conductive polymer and the polymeric impurity in the conductive material has antistatic properties with a relatively small addition amount as compared with other conductive materials. For this reason, it is preferable from the viewpoint that the light-transmitting fine particles for imparting the antifogging property and the inorganic component capable of forming the irregularities by agglomeration can be relatively easily mixed.

There is a method of adding an ultraviolet absorber to a mixture of a resin component and a conductive material in order to improve deterioration of antistatic property by the light resistance test. However, in this method, when an ionizing radiation curable resin having a high hardness is used as a resin component, there arises a problem that it may hinder curing by irradiation of ultraviolet rays, so that the scratch resistance required for the optical laminate tends to decrease . In the present invention, the deterioration of the antistatic property due to the light resistance can be suppressed without using the ultraviolet absorber, so that both scratch resistance and antistatic property, which have been difficult in the past, can be satisfied.

[Transparent fine particles]

By containing the light-transmitting fine particles in the optical function layer, it is possible to form the unevenness in the surface layer of the optical function layer. Examples of the light-transmitting fine particles include organic light-transmitting resin fine particles composed of an acrylic resin, a polystyrene resin, a styrene-acrylic copolymer, a polyethylene resin, an epoxy resin, a silicone resin, a polyvinylidene fluoride, a polyfluoroethylene resin and the like, silica, alumina, titanium dioxide, Inorganic light-transmitting fine particles such as zirconium oxide, calcium oxide, tin oxide, indium oxide and antimony oxide can be used. The light transmitting fine particles have a certain diameter and have a refractive index difference from the matrix in the optical function layer to form irregularities on the surface to scatter light or to scatter light in the optical function layer. The optical laminate comprising the optical function layer containing the light-transmitting fine particles can be used as an antiglare film. Here, the average particle diameter of the light-transmitting fine particles is preferably 0.3 to 10 mu m, more preferably 1 to 8 mu m. When the particle diameter is smaller than 0.3 탆, the antireflection property is lowered. When the particle diameter is larger than 10 탆, flashing occurs and the surface irregularity becomes too large and the surface becomes whitish. The refractive index of the light-transmitting fine particles is preferably from 1.40 to 1.75, and when the refractive index is less than 1.40 or greater than 1.75, the refractive index difference from the light-transmitting substrate or the resin matrix becomes too large and the overall light transmittance decreases. The difference in refractive index between the light-transmitting fine particles and the resin component is preferably 0.2 or less. The proportion of the light-transmitting fine particles contained in the optical functional layer is not particularly limited, but it is preferable that the proportion of the light-transmitting fine particles contained in the optical functional layer is 1 to 20% by weight based on 100 parts by weight of the resin composition, It is easy to adjust the shape of irregularities and the haze value. Here, the &quot; refractive index &quot; refers to a measurement value according to JIS K-7142. The &quot; average particle diameter &quot; indicates an average value of the diameters of 100 particles measured by an electron microscope.

The average particle diameter of the light-transmitting fine particles is preferably in the range of 0.3 to 10 mu m, more preferably 1 to 8 mu m. When the particle diameter is smaller than 0.3 탆, the antireflection property is lowered. When the particle diameter is larger than 10 탆, flashing occurs and the surface irregularity becomes too large and the surface becomes whitish.

[An inorganic component capable of forming concavo-convex by agglomeration]

The optical functional layer of the present invention can be produced by forming irregularities using agglomeration of an inorganic component. The inorganic component to be used is not particularly limited as long as it is contained in the optical functional layer and coheres to form surface irregularities at the time of film formation. Examples of the inorganic component include metal oxide sols such as silica sol and zirconia sol, aerosol, swellable clay, and layered organic clay. Among these inorganic components, the layered organic clay is preferable in that the surface irregularities can be stably formed. The reason why the layered organic clay can stably form surface irregularities is that the layered organic clay has a high compatibility with the resin component (organic component) and has cohesiveness, so that the structure of the first and second phases is intertwined And it is easy to form surface irregularities at the time of film formation.

In the present invention, the layered organic clay refers to an organic onium ion introduced between the layers of the swellable clay. The layered organic clay has a low dispersibility with respect to a specific solvent. When a layered organic clay and a solvent having specific properties are used as a coating for forming an optical functional layer, it is possible to add fine particles to the optical functional layer , An optical functional layer having surface irregularities is formed.

(Swelling clay)

The swellable clay has cation exchange ability and swells by putting water between the layers of the swellable clay. The swellable clay may be a natural product or a compound (including a substituent and a derivative). It may also be a mixture of a natural product and a compound.

Examples of the swellable clay include mica, synthetic mica, barmicule, montmorillonite, iron montmorillonite, videira, saponite, hectorite, stevensite, nontronite, magidite, irarite, Layered titanic acid, smectite, and synthetic smectite. These swelling clays may be used either singly or in combination.

(Organic onium ion)

The organic onium ion is not limited as long as it can organize by utilizing the cation exchangeability of the swellable clay. Examples of the onium ion include quaternary ammonium salts such as dimethyldistearyl ammonium salt and trimethylstearyl ammonium salt and ammonium salts having a benzyl group or a polyoxyethylene group, or a phosphonium salt, a pyridinium salt, or an imidazolium salt Ions can be used. Examples of salts include salts with anions such as Cl ^- , Br ^- , NO ₃ ^- , OH ^- , CH ₃ COO ^- and the like. As the salt, it is preferable to use a quaternary ammonium salt.

The functional group of the organic onium ion is not limited, but the use of a material containing any one of an alkyl group, a benzyl group, a polyoxypropylene group and a phenyl group is preferable because it is easy to exhibit a flashing property.

The preferable range of the alkyl group is 1 to 30 carbon atoms, and examples thereof include methyl, ethyl, propyl, isopropyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, decyl, undecyl, dodecyl, tridecyl, Pentadecyl, octadecyl and the like.

The preferred range of n in the polyoxypropylene group [(CH ₂ CH (CH ₃ ) O) _n H or (CH ₂ CH ₂ CH ₂ O) _n H] is 1 to 50, more preferably 5 to 50, The more the molar number of addition is, the better the dispersibility with respect to the organic solvent. However, if the excess is added, the product becomes sticky. Therefore, when the dispersibility with respect to the solvent is emphasized, the number of n is more preferably from 20 to 50. When the number of n is 5 to 20, the product is non-sticky and excellent in crushability. From the viewpoints of dispersion and handling, the total number of n in the quaternary ammonium is preferably 5 to 50.

Specific examples of the quaternary ammonium salt include tetraalkylammonium chloride, tetraalkylammonium bromide, polyoxypropylene trialkylammonium chloride, polyoxypropylene trialkylammonium bromide, di (polyoxypropylene) dialkylammonium chloride, di (Polyoxypropylene) dialkylammonium bromide, tri (polyoxypropylene) alkylammonium chloride, tri (polyoxypropylene) alkylammonium bromide, and the like.

In the quaternary ammonium ion of the general formula (I), R ¹ is preferably a methyl group or a benzyl group. R ² is preferably an alkyl group having 1 to 12 carbon atoms, particularly preferably an alkyl group having 1 to 4 carbon atoms. R ³ is preferably an alkyl group having 1 to 25 carbon atoms. R ⁴ is preferably an alkyl group having 1 to 25 carbon atoms, (CH ₂ CH (CH ₃ ) O) _n H or (CH ₂ CH ₂ CH ₂ O) _n H group. n is preferably from 5 to 50. [

The blending amount of the layered organic clay is preferably 0.1 to 10% by weight, particularly preferably 0.2 to 5% by weight, based on the total weight of the solid component in the resin composition. If the blending amount of the layered organic clay is less than 0.1% by weight, a sufficient number of surface irregularities are not formed, which causes a problem that the dispersibility is insufficient. If the compounding amount of the layered organic clay is more than 10% by weight, the number of surface irregularities increases and visibility is impaired.

As the solvent, it is preferable that the solvent forming the surface irregularities for obtaining the antifogging property contains the first solvent and the second solvent.

The first solvent and the second solvent may be added to the resin composition of the present invention to form a coating capable of forming the optical functional layer of the present invention. Since the paint capable of forming the optical functional layer of the present invention contains the first solvent and the second solvent, it is possible to add the fine particles which are considered essential for preparing the surface relief shapes of the optical functional layer The surface irregularity shape of the optical functional layer can be formed.

The first solvent means that the layered organic clay can be dispersed in a state of transparency without causing substantial turbidity to the layered organic clay. Substantial non-turbidity includes not being turbid at all, and may be considered non-turbid. Specifically, as the first solvent, it is meant that the haze value of the mixed solution obtained by adding 1,000 parts by weight of the first solvent to 100 parts by weight of the layered organic clay is 10% or less. The haze value of the mixed solution obtained by adding and mixing the first solvent is preferably 8% or less, more preferably 6% or less. The lower limit value of the haze value of the mixed solution is not particularly limited, but is, for example, 0.1%. As the first solvent, for example, a so-called low polarity solvent (non-polar solvent) can be used. This is because the layered organic clay is subjected to the organizing treatment, so that the layered organic clay is easily dispersed by the solvent. For example, when synthetic smectite is used as the layered organic clay, aromatic solvents such as benzene, toluene, and xylene can be used as the first solvent, although the first solvent that can be used varies depending on the kind of the layered organic clay have. These first solvents may be used either singly or in combination.

The second solvent means that the layered organic clay can be dispersed in a state of causing turbidity. Specifically, as the second solvent, it is meant that the haze value of the mixed solution obtained by adding 1,000 parts by weight of the second solvent to 100 parts by weight of the layered organic clay is 30% or more. The haze value of the mixed solution to which the second solvent is added is preferably 40% or more, more preferably 50% or more. The upper limit value of the haze value of the mixed solution is not particularly limited, but is, for example, 99%.

As the second solvent, for example, a so-called polar solvent can be used. This is because the layered organic clay is subjected to the organizing treatment, so that it becomes difficult to disperse by the above-mentioned solvent. For example, when synthetic smectite is used as the layered organic clay, the second solvent may be water, methanol, ethanol, propanol, isopropanol, methyl ethyl Ketone, isopropyl alcohol, and the like. These second solvents may be used either singly or in combination.

Here, it is preferable to use a mixture of the first solvent and the second solvent because it is easy to form surface irregularities for obtaining the antifogging property. When the mixing ratio of the first solvent and the second solvent is in the range of 10:90 to 90:10 by weight, the surface irregularities for obtaining the antifogging property are easily formed, which is preferable. The mixing ratio of the first solvent to the second solvent is preferably in the range of 15:85 to 85:15 and more preferably in the range of 20:80 to 80:20 by weight. If the amount of the first solvent is less than 10 parts by weight, there arises a problem that appearance defects due to unheated products occur. When the amount of the first solvent is more than 90 parts by weight, there is a problem that surface irregularities for obtaining sufficient antifogging property can not be obtained.

The blending amount of the resin composition and the solvent (the sum of the first solvent and the second solvent) may be in the range of 70:30 to 30:70 by weight. If the amount of the resin composition is less than 30 parts by weight, drying unevenness may occur to deteriorate the appearance and increase the number of surface irregularities, thereby impairing the visibility. When the amount of the resin composition exceeds 70 parts by weight, solubility of the solid content tends to be impaired, and therefore, there is a problem that film formation becomes impossible.

In the case of combining the method of forming irregularities by an inorganic component and the method of attaching irregularities by fine particles

A method of forming irregularities by coagulation of inorganic components and a method of attaching irregularities by fine particles can be combined. By adding light-transmitting fine particles to the resin composition, it is easy to adjust the shape and number of the surface irregularities of the optical function layer.

When fine particles are added to the coating for optical functional layer formation to form an optical functional layer, fine particles are localized on the edge of the convex portion (concave portion of the optical functional layer) formed by aggregation of the inorganic component. The reason why the fine particles are unevenly distributed on the edge of the convex portion is considered as follows.

In the coated layer after coating, the inorganic material component forms a cohesive structure in the convection domain and the coarse particles start to deviate at the edge of the cohesive structure. When the fluidity of the coating solution is lost by the drying step, the fine particles are fixed and eventually deviated to the edge of the convex portion.

There is an advantage in that the shape of the surface irregularities formed by the aggregation of the inorganic components can be adjusted by the addition of the fine particles. By adjusting the shape of the surface of the optical function layer, it is possible to improve the scratch resistance and surface hardness of the surface of the optical function layer.

(Polarizing gas)

In the present invention, the polarizing body may be laminated on the light transmitting substrate opposite to the optical function layer. A polarizing plate can be obtained by laminating the optical functional layer, the light transmitting substrate and the polarizing gas. These layers may be directly laminated or may be laminated through another layer such as an adhesive layer. Here, the polarizing gas may be a light absorption type polarizing film that transmits only a specific polarized light and absorbs other light, or a light reflecting type polarizing film that transmits only a specific polarized light and reflects other light. As the light absorption type polarizing film, a film obtained by stretching polyvinyl alcohol, polyvinylene, or the like can be used. For example, a polyvinyl alcohol obtained by uniaxially stretching polyvinyl alcohol adsorbed with oxo or dye as a dichroic element, Vinyl alcohol (PVA) film. As the light reflection type polarizing film, for example, two types of polyester resins (PEN and PEN copolymers) having different refractive indexes in the stretching direction when stretched are laminated by stretching in several hundred layers by extrusion molding technology DBEF &quot; manufactured by 3M Co., Ltd., a cholesteric liquid crystal polymer layer and a 1/4 wavelength plate, and separates light incident from the side of the cholesteric liquid crystal polymer layer into two circularly polarized lights in mutually opposite directions, "Nixon" manufactured by Nitto Corporation and "Transmax" manufactured by Merck Co., Ltd., which are configured to reflect circularly polarized light transmitted through the cholesteric liquid crystal polymer layer by reflecting the other side of the transmission and converted into linearly polarized light by a quarter wave plate have.

The polarizing plate used in the liquid crystal display is formed by laminating a polarizing gas and a triacetyl cellulose protective film obtained by stretching a triacetylcellulose protective film provided with an optical functional layer such as an antiglare layer or a hard coat layer and a dyed polyvinyl alcohol Consists of.

When the polarizing gas and the triacetylcellulose-based protective film are laminated, the saponification treatment is performed to improve the adhesion between the polarizing gas and the protective film. Here, the saponification treatment is carried out for the purpose of hydrophilizing the surface of a triacetyl cellulose film on which a coating layer such as an antiglare layer (optical functional layer) is not provided. However, since the saponification treatment is performed by immersing the entire film provided with the coating layer such as the optical functional layer in various solutions, the surface of the coating layer such as the optical functional layer provided on the triacetyl cellulose is also treated.

The hydrophilization of the triacetylcellulose surface by the saponification treatment can be confirmed by measurement of the contact angle of water. When the contact angle of water on the surface of the triacetylcellulose film becomes not more than 20 deg. After the treatment, the saponification treatment is properly performed .

The saponification treatment is carried out by immersion in an aqueous alkaline solution, washing with water, neutralization by immersion in an aqueous acid solution, washing with water and drying with heat. Here, the saponification treatment may deteriorate the properties of the component for forming the coating layer provided on the triacetyl cellulose by elution into an aqueous alkali solution or an aqueous acid solution. For this reason, the optical functional layer or the optical laminate laminated on the triacetylcellulose protective film is required to have anti-saponification property, and in particular, it is required to reduce deterioration of antistatic property by the saponification treatment.

Further, since the triacetylcellulose-based protective film used for the polarizing plate has a coating layer such as a saponified anti-glare layer exposed and used on the surface thereof, the optical functional layer or the optical laminate layer laminated on the triacetylcellulose- It is necessary to have both the light resistance and the light resistance.

The optical laminate of the present invention including the optical function layer is excellent in light resistance and saponification resistance. That is, the optical function layer and the optical laminate of the present invention were evaluated for their optical properties after the carbon arc type light resistance test under the conditions of a radiation intensity of 500 W / m 2 (measurement wavelength range 300 to 700 nm) and a black panel temperature of 50 ± 5 ° C. for 80 hours The ratio (R2 / R1) of the surface resistivity R2 to the surface resistivity R1 at the time of non-treatment is required to be 10 ⁴ or less, preferably 10 ³ or less, and particularly preferably 10 ² or less. The ratio (R 3 / R 1) of the surface resistivity R 1 at the time of untreated to the surface resistivity R 3 after the saponification treatment is preferably 10 or less, more preferably 5.0 or less, and is preferably 1.0 or less Is particularly preferable. The surface resistivity R4 after the carbon arc type light resistance test under the conditions of the saponification treatment and the irradiation condition of 500 W / m 2 (measurement wavelength range 300 to 700 nm) and the black panel temperature of 50 ± 5 ° C for 80 hours and the surface The ratio (R4 / R1) to the resistivity R1 is preferably 10 ⁴ or less, more preferably 10 ³ or less, and particularly preferably 10 ² or less.

The optical functional layer and the optical laminate of the present invention preferably have an image sharpness in the range of 5.0 to 80.0 (measured using a 0.5 mm optical comb according to JIS K7105), and more preferably 20.0 to 75.0. When the image sharpness is less than 5.0, the contrast is deteriorated. When the image sharpness is more than 80.0, the retardation is deteriorated. Therefore, the optical laminate is not suitable for the display surface.

The optical functional layer and the optical laminate of the present invention preferably have a total light transmittance of 91.0% or more, more preferably 92.0% or more, and still more preferably 93.0% or more, according to JIS K7105. When the total light transmittance is less than 91.0%, the contrast is deteriorated and it is not suitable for the optical laminate used for the display surface.

Further, in order to reduce the possibility that the antistatic property and the antifouling property are lowered even when the saponification treatment is performed by developing the antistatic property and the antifouling property, the following form is more preferable. The optical laminate of this embodiment has an optically functional layer obtained by curing a composition containing an ionizing radiation curable fluorinated acrylate and a conductive metal oxide and a light transmitting gas. Here, the optically functional layer may be laminated on one surface of the light-transmitting substrate or on both surfaces thereof. Further, the optical laminate may have another layer. Here, the other layer may be, for example, a polarizing gas or another function-imparting layer (for example, a near-infrared (NIR) absorption layer, a neon-cut layer, or an electromagnetic wave shielding layer). The position of the other layer is, for example, on the transparent substrate opposite to the optical function layer in the case of a polarizing gas, and below the optical function layer in the case of another function imparting layer. However, the optical laminate is preferable because it can reduce the number of layers because it is composed only of a light-transmitting substrate and an optically functional layer directly provided on the light-transmitting substrate. According to the composition according to the present preferred embodiment, It is possible to obtain an optical laminate having properties that sufficiently satisfy the characteristics required when applied to an image display apparatus such as a liquid crystal display. Hereinafter, each component (optical functional layer, translucent gas, etc.) of the optical laminate according to the present preferred embodiment will be described in detail.

Ionizing radiation curing fluoride Acrylate

The ionizing radiation curable fluorinated acrylate of this embodiment has a molecular weight of 1,000 or more. As the ionizing radiation curable fluorinated acrylate, fluorinated acrylate having a molecular weight of 1,000 to 4,000 is preferably used. It is difficult to lower the antistatic property and the antifouling property even when the saponification treatment is carried out. When the molecular weight is less than 1,000, it is not preferable because sufficient fluorine atoms can not be introduced and sufficient leveling property can not be obtained. When the molecular weight is more than 4,000, the crosslinking density is lowered and sufficient hardness can not be obtained.

The addition of ionizing radiation-curable fluorinated acrylate makes it possible to exhibit sufficient antifouling properties even after the saponification treatment because the optical functional layer is excellent in chemical resistance. The ionizing radiation-curable fluorinated acrylate is an ionizing radiation curing type as compared with the other ionizing radiation curing type, and has an effect of exhibiting sufficient antifouling property even after the saponification treatment because the cross-linking between the molecules occurs and the chemical resistance is excellent. It is preferable that the fluorinated acrylate component is localized near the surface layer of the optical functional layer and that the fluorine component in the fluorinated acrylate molecule is localized near the surface layer of the optical functional layer. As a result, problems such as the drop of the conductive metal oxide by the saponification treatment are less likely to occur. For example, the fact that fluorinated acrylate is localized on the surface side from the side of the translucent substrate means that the proportion of the fluorine element existing in the range from the surface of the optical function layer containing fluorinated acrylate to the depth of 5 nm is 10% or more. The fluorine element ratio is measured by Electron Spectroscopy for Chemical Analysis (hereinafter referred to as "ESCA"). In ESCA, the abundance ratio of fluorine is calculated from the peak areas of fluorine, carbon, oxygen, and silicon obtained at a depth of 5 nm. In addition, when the range from the surface of the optical functional layer to the depth of 200 nm is measured in 5 nm units by ESCA, the thickness is measured every 5 nm from the surface of the optical functional layer to the depth of 5 nm, The value obtained by dividing the fluorine element ratio by the average value of the fluorine element ratio existing from the depth of 5 nm to the depth of 200 nm of the surface of the optical function layer is preferably 10 or more and more preferably 20 or more. The upper limit is not particularly limited, but is, for example, 1,000 or less. By setting the value to 10 or more, fluorine atoms can efficiently be present on the surface of the optical function layer, so that it is possible to provide an optical laminate excellent in economical efficiency even when expensive fluorine materials are used.

It is preferable that the ionizing radiation curable fluorinated acrylate contains an acrylate containing a perfluoroalkyl group, the perfluoroalkyl group is represented by -C _n F _{2n +1} , and the number of n is 4 to 9. When n is 3 or less, fluorine atoms can not be sufficiently introduced, which is not preferable. When n is 10 or more, the crosslinking density is lowered and sufficient hardness can not be obtained, which is not preferable. It is predicted that when the fluoroacrylate is applied, the fluorine-containing layer is unevenly deposited on the outermost surface. Therefore, when the conductive metal oxide is used in combination with the conductive metal oxide, a fluorine-containing layer is formed in the upper layer of the conductive metal oxide, which may increase the surface resistivity. When the number of n in the perfluoroalkyl group (-C _n F _{2n + 1} ) is in the range of 4 to 9, since molecular chains containing fluorine aggregate to form a crystal structure, localized portions of the conductive metal oxide appear, And it is preferable that the function of the conductive metal oxide is not hindered. When a substituent having a fluorine atom existing at the end of a molecule such as a perfluoroalkyl group (-C _n F _{2n + 1} ) is present, it is compared with a perfluoroalkylene group (-C _n F _2n -) present in the middle of the molecule The fluorine component in the molecule tends to be localized in the vicinity of the surface layer of the optical function layer before the formation of the optical function layer, so that it is easy to improve the antifouling property.

The ionizing radiation-curable fluorinated acrylate preferably has a fluorine atom content of 20% or more. The fluorine atom content is the ratio of the fluorine atom content to the molecular weight of the fluorinated acrylate, and is obtained by the following formula.

Fluorine atom content = [((amount of fluorine contained in the molecule) / (molecular weight)] x 100

When the fluorine atom content is less than 20%, it is necessary to use a large amount of fluoroacrylate in order to exhibit sufficient antifouling property, which is economically disadvantageous. However, compatibility with other materials There arises a problem that a detailed compounding ratio must be determined after the application.

The ionizing radiation curable fluorinated acrylate contains three or more acryloyl groups. Since three or more acryloyl groups are contained, it is possible to improve the hardness of the optical functional layer. When the conductive metal oxide is used in admixture with the conductive metal oxide, the conductive metal oxide is fixed in the highly crosslinked molecular chain. Therefore, problems such as dropout of the antifouling component and the conductive metal oxide component by the saponification treatment hardly occur, The antifouling property and the electric conductivity are less likely to be lowered.

It is preferable that the ionizing radiation curable fluorinated acrylate is urethane acrylate. The viscosity is high because the fluorinated acrylate is urethane acrylate. As a result, the film-forming property is improved. Since fluoro acrylate is urethane acrylate, it is preferable from the viewpoints of scratch resistance, elongation and flexibility of the cured product.

As the ionizing radiation curable fluorinated acrylate, the following compounds (i) to (e) can be used. In addition, the following compounds are all acrylates, and the acryloyl groups in the formulas can all be changed to methacryloyl groups.

These may be used singly or in combination. The urethane acrylate containing fluorinated alkyl group having a urethane bond in the fluorinated acrylate is preferable in terms of scratch resistance, stretching and flexibility of the cured product. Among the fluorinated acrylates, polyfunctional acrylates are preferred. In addition, the polyfunctional fluorinated acrylate herein means having three or more, more preferably four or more (meth) acryloyloxy groups.

As the ionizing radiation curable fluorinated acrylate, a compound represented by the following formula (A) is preferable.

Wherein Cy is a cycloalkyl moiety of a 5 or 6 membered ring in which a part of the hydrogen is substituted by a substituent of the above formula and optionally a methyl group or an ethyl group, a is an integer of 1 to 3, X is a methylene group or a direct bond , R _F is a perfluoroalkyl group having 4 to 9 carbon atoms, and n is an integer of 1 to 3. However, when a is 2 or more, X, R _F , and n are independently selected from each other.

Among the compounds represented by the above formula (A), the compound represented by the following formula (B) is particularly preferable.

(Wherein R _F is a perfluoroalkyl group having 4 to 9 carbon atoms, n is an integer of 1 to 3, m is 0 or an integer of 1 to 3, and n + m is an integer of 3 or less)

More specifically, the following compounds (1) or (2) are preferred.

The proportion of the ionizing radiation curable fluorinated acrylate contained in the optical functional layer is not particularly limited, but is preferably 0.05 to 50% by weight, more preferably 0.2 to 20% by weight in 100 parts by weight of the resin composition. If the blending amount of ionizing radiation-curable fluorinated acrylate is less than 0.05% by weight, the water repellency and slipperiness are lowered, and the scratch resistance, antifouling property and chemical resistance are deteriorated. If the amount of the ionizing radiation-curable fluorinated acrylate is more than 50% by weight, the film-forming property may be deteriorated.

A polymer resin may be added to the system of the resin composition within a range that does not hinder the polymerization curing. The polymer resin is a thermoplastic resin that is soluble in an organic solvent used in an optical functional layer coating described later. Specific examples thereof include an acrylic resin, an alkyd resin, a polyester resin, and a cellulose derivative. Among these resins, , Sulfonic acid group and the like.

&Lt; Optical laminate &

The optical functional layer-forming coating material containing the above-described components is applied directly or through another layer on the light-transmitting substrate and then irradiated with heat or ionizing radiation (for example, electron beam or ultraviolet ray irradiation) Is cured to form an optical functional layer, whereby the optical laminate of the present invention can be obtained. The first solvent and the second solvent may be used even when the optical functional layer does not contain at least one of light-transmitting fine particles or an inorganic component capable of forming concavities and convexities by agglomeration. The optical functional layer may be formed on one surface of the light transmitting substrate or on both surfaces thereof.

The thickness of the optical function layer is preferably in the range of 1.0 to 12.0 占 퐉, more preferably in the range of 2.0 to 11.0 占 퐉, and still more preferably in the range of 3.0 to 10.0 占 퐉. When the optical function layer is thinner than 1.0 占 퐉, curing defects due to oxygen inhibition are caused at the time of ultraviolet curing, and scratch resistance of the optical functional layer is liable to deteriorate. When the optical function layer is thicker than 12.0 占 퐉, curling or micro cracks due to curing shrinkage of the optical function layer, a decrease in adhesion with the light transmitting substrate, and a decrease in light transmittance occur. Further, it may cause a rise in cost due to an increase in the amount of necessary paint accompanying the increase of the film thickness.

<Surface resistivity>

The surface resistivity measured from the surface of the optical functional layer of the above optical laminate is required to be 1.0 10 ¹² ? /? Or less. If it exceeds 1.0 10 ¹² ? / ?, sufficient antistatic performance may not be obtained. The surface resistivity is preferably 1.0 x 10 ¹² ? /? To 1.0 x 10 ¹⁰ ? /?, Which is a range where the electrostatic charge is charged but is immediately attenuated, more preferably 1.0 x 10 ¹⁰ ? /? , And 1.0 × 10 ⁹ Ω / □ or less is particularly preferable. The lower limit value is not limited, but is, for example, 1.0 x 10 &lt; ⁶ &gt; When the optical laminate is mounted on a PVA (PATTERNED VERTICAL ALIGNMENT) liquid crystal, the surface resistivity should be 1.0 10 ¹⁰ ? /? Or less. If this is exceeded, there arises a problem of image display such as liquid crystal inversion due to charging of static electricity on the display surface.

The surface resistivity of the optical laminate after the saponification treatment is required to be 1.0 10 ¹² ? /? Or less. If it exceeds 1.0 10 ¹² ? / ?, sufficient antistatic performance may not be obtained. The surface resistivity shows a property of charging at a static charge in a range of 1.0 x 10 ¹² Ω / □ to 1.0 × 10 ¹⁰ Ω / □, but immediately attenuating, preferably 1.0 × 10 ¹⁰ Ω / □ or less with a small charge. The lower limit value is not limited, but is, for example, 1.0 x 10 &lt; ⁶ &gt;

<Saturation voltage>

It is preferable that the optical stacked body has a saturation voltage at the top surface of 1.5 kV or less. In order to set the saturation voltage to 1.5 kV or less, it is possible to add a conductive material exhibiting good conductivity in the optical function layer and increase the amount of the conductive material added. The saturation voltage vs. surface resistivity is correlated, and the saturation voltage is lower with lower surface resistivity. When the saturation voltage exceeds 1.5 kV, the liquid crystal display of the IPS mode applies a potential between the electrodes arranged in the horizontal direction, and therefore, there is a fear that the display is likely to be disturbed by charging on the surface of the liquid crystal display. More preferably, the saturation voltage is 1.0 kV or less, and more preferably 0.5 kV or less. The lower limit value is not limited, but is, for example, 0.01 kV.

The saturation voltage can be measured in accordance with JIS L1094, and a half-life method can be used. The half-life method can be measured using a commercially available measuring instrument such as a static ONESTOMETER H-0110 (manufactured by Seishi Etsu Electric Co., measurement conditions: applied voltage 10 kV, distance 20 mm, 25 캜, 40% RH)

As a specific measuring method, for example, a sample (4 cm x 4 cm) is fixed on a turntable and rotated, a voltage is applied, and the withstand voltage value (kV) of the surface of the sample is measured by the measuring device. By plotting the decay curve of the withstand voltage with respect to time, the half-life (the time until the charge reaches half the initial value) and the saturation voltage can be measured.

<Light resistance>

An optical laminate having an optical function layer such as an antiglare layer or a hard coat layer used for a display is required to have light resistance by being used outdoors. The light resistance test is carried out by natural exposure with sunlight, but since a long time is required until the deterioration occurs, an accelerated test is usually conducted to irradiate artificial light. A carbon arc light resistance tester using an ultraviolet carbon arc lamp as a light source can be used for the acceleration test. Test conditions by a carbon arc light resistance tester are defined in JIS K5600-7-5, and in this specification, values measured in accordance with the test conditions are used.

The optical function layer provided on the light transmitting substrate due to the ultraviolet light reflected by the light resistance tester may have deteriorated characteristics due to structural changes such as cleavage of molecular chains. For this reason, light resistance is required for the optical functional layer and the optical laminate to be laminated on the light transmitting substrate, and reduction of the deterioration of the antistatic property by the light resistance test is particularly demanded.

<Hayes>

The total haze of the optical laminate related to this preferred embodiment is preferably 3 to 13, more preferably 4 to 10.5, and still more preferably 5 to 9.

<Total light transmittance>

The total light transmittance of the optical laminate is preferably 90% or more, more preferably 90.5% or more, still more preferably 91% or more.

&Lt; Image sharpness &

The image sharpness of the optical laminate before the saponification treatment is preferably 0 to 80% at the optical comb width of 0.5 mm, more preferably 10 to 77.5%, and still more preferably 20 to 75%.

<Flash>

The glare of the optical laminate is attached to a surface of several liquid crystal displays having different resolutions through a colorless transparent adhesive layer on the surface opposite to the optical laminate formation surface, and photographing is performed by a CCD camera to judge whether there is a luminance unbalance of the image . It is preferable that the glare can not be confirmed with a display having a higher resolution, and it is preferable that the display has no glare in a liquid crystal display having a resolution of 101 to 140 ppi.

<Average inclination angle>

The optical laminate of the present invention has a fine concave-convex shape on the surface of the optical function layer. Here, the fine irregular shape preferably has an average inclination angle calculated from the average inclination required according to ASME95 in the range of 0.2 to 1.4, more preferably 0.25 to 1.2, and still more preferably 0.25 to 1.0. When the average tilt angle is less than 0.2, the retardation is deteriorated. When the average tilt angle is more than 1.4, the contrast is deteriorated, so that it is not suitable as an optical laminate used for the display surface.

<Surface roughness>

The optical laminate of the present invention preferably has a surface roughness Ra of 0.05 to 0.2 占 퐉, more preferably 0.05 to 0.15 占 퐉, and particularly preferably 0.05 to 0.10 占 퐉, as the minute concavo-convex shape of the optical function layer. If the surface roughness Ra is less than 0.05 m, the optical laminate has insufficient flicker resistance. When the surface roughness Ra exceeds 0.2 탆, the contrast of the optical laminate is deteriorated.

<Contact angle>

The contact angle of the optical laminate before saponification treatment is preferably 100 DEG or more in water, and more preferably 105 DEG or more. The upper limit is not particularly limited, but is, for example, 150 DEG or less. The contact angle of the optical laminate after the saponification treatment is preferably 90 DEG or more in water, and more preferably 95 DEG or more. The upper limit is not particularly limited, but is, for example, 150 DEG or less.

<Antifouling property>

Antifouling property can be evaluated by the ease of wiping off the ink when a line is drawn on an optical functional layer with a oil-based pen (trade name: Mackie (registered trademark), manufactured by ZEBRA). It can be evaluated by a method of wiping with a clean wiper (product number: FF-390C, manufactured by Kurarake Co., Ltd.), and it is easy to wipe out the better the stain-proof property. It is preferable that the wax can be completely wiped after reciprocating 20 times at a load of 500 g / cm &lt; 2 &gt;.

<Macbeth concentration>

Macbeth reflection density of the optical laminate of the present invention indicates that the surface of the optical film opposite to the resin layer of the light-transmitting substrate is black and the measured value is black as the measured value increases. The value of Macbeth reflection density is preferably 3.2 or more. When an optical film is used on the surface of a display or the like, since a large difference can not be seen in a white display, it is necessary to emphasize black in a black display in order to achieve a high contrast. When the Macbeth reflection concentration is less than 3.2, the high contrast is insufficient.

<Glossiness>

The 60 ° gloss of the optical laminate of the present invention is preferably in the range of 100 to 130. When the degree of gloss of 60 ° is larger than 130, it is undesirable because the reflectance becomes low. When the degree of gloss of 60 ° is less than 100, the degree of color fastness is good, but the scattering of light on the surface becomes strong, so that the bright room contrast is lowered.

&Lt; Method of producing optical laminate >

As a method of applying the optical functional layer-forming coating material onto the translucent base, a normal coating method or a printing method is applied. Specific examples of the coating composition include air doctor coating, bar coating, blade coating, knife coating, reverse coating, transpirol coating, gravure roll coating, kiss coating, cast coating, spray coating, slot orifice coating, calendar coating, Coating such as die coating, intaglio printing such as gravure printing, printing such as stencil printing such as screen printing, and the like can be used.

Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited thereto.

(Production Example 1) Production of Synthetic Smectite

4 liter of water was added to a 10-liter beaker, and 860 g of 3-lake glass (SiO ₂ 28%, Na ₂ O 9%, molar ratio 3.22) was dissolved and 162 g of 95% sulfuric acid was added thereto with stirring to obtain a silicate solution . Next, 560 g of MgCl ₂ .6H ₂ O primary reagent (purity: 98%) was dissolved in 1 L of water, and this solution was added to the silicate solution to prepare a homogeneous mixed solution. This was added dropwise to 3.6 L of 2 N NaOH solution with stirring for 5 minutes. The obtained reaction precipitate was immediately passed through a cross-flow filtration system (cross-flow filter (ceramic membrane filter: bore diameter 2 mu m, tubular type, filtration area 400 cm2) manufactured by Japan Kishi Co., Ltd., pressurization: 2 kg / , Filter cloth: Tetron 1310], and then a solution consisting of 200 ml of water and 14.5 g of Li (OH) .H ₂ O was added to obtain a slurry. This was transferred to an autoclave and subjected to hydrothermal reaction at 41 kg / cm 2 and 250 ° C for 3 hours. After cooling, the reaction product was taken out and dried at 80 DEG C and pulverized to obtain a synthetic smectite of the following formula. The synthetic smectite was analyzed and the following composition was obtained. Na _{0 .4} Mg _{2 .6} Li _{0 .4} Si ₄ O ₁₀ (OH) ₂

The cation exchange capacity as measured by the methylene blue adsorption method was 110 milliequivalents / 100 g.

(Production Example 2) Production of synthetic smectite based layered organic clay A

20 g of the synthetic smectite synthesized in Production Example 1 was dispersed in 1,000 ml of tap water, and the suspension was used. 500 ml of an aqueous solution containing a quaternary ammonium salt (98% content) of the following formula (II) equivalent to 1.00 times the cation exchange capacity of the above-mentioned synthetic smectite was added to the synthetic smectite suspension and reacted at room temperature for 2 hours while stirring. The product was subjected to solid-liquid separation and washing to remove by-product salts, and then dried to obtain a layered organic clay A of synthetic smectite.

(Preparation Example 3) Synthesis of ionizing radiation-curable fluorinated acrylate B solution

In a 500 ml reaction flask, a solution of 59.6 g (0.20 mol) of pentaerythritol triacrylate was added to a solution of 22.2 g (0.1 mole) of isophorone diisocyanate in 100 ml of MIBK (methyl isobutyl ketone) Ml &lt; / RTI &gt; was added dropwise at 25 deg. After completion of the dropwise addition, 0.3 g of dibutyltin dilaurate was added, and further heating stirring was carried out at 70 DEG C for 4 hours. After completion of the reaction, the reaction solution was washed with 100 ml of 5% hydrochloric acid. After collecting the organic layer, the solvent was distilled off under reduced pressure at 40 DEG C or lower to obtain 80.5 g of urethane acrylate as a colorless transparent viscous liquid. 40.8 g (0.05 mol) of urethane acrylate, 71.9 g (0.15 mol) of perfluorooctylethyl mercaptan, and 60 g of MIBK were added to a 200 ml reaction flask and homogenized. To this mixed solution was gradually added 1.0 g of triethylamine at 25 占 폚. After the addition, the mixture was further stirred at 50 DEG C for 3 hours. After completion of the reaction, triethylamine was distilled off under reduced pressure using an evaporator at a temperature of 50 ° C or lower, and the residue was dried with a vacuum pump to obtain a fluorinated alkyl group-containing urethane acrylate represented by Structural Formula 1 and having an acryloyl group and a perfluoro To obtain an ionizing radiation-curable fluorinated acrylate B liquid comprising a mixture further comprising a compound different from the above-mentioned structural formula 1 in the position of addition reaction with octylethylmercaptan.

Molecular Weight; 2,259

Fluorine atom content; 42.9%

(Production Example 4) Synthesis of polystyrene sulfonic acid

206 g of sodium styrenesulfonate was dissolved in 1,000 ml of ion-exchanged water and 1.14 g of ammonium persulfate oxidant solution previously dissolved in 10 ml of water was added dropwise over 20 minutes while stirring at 80 DEG C, and this solution was stirred for 12 hours . 1,000 ml of sulfuric acid diluted to 10% by weight was added to the obtained sodium styrenesulfonate-containing solution, about 1,000 ml of the polystyrene sulfonic acid-containing solution was removed by ultrafiltration, 2,000 ml of ion-exchanged water was added to the remaining solution, Was used to remove about 2,000 mL of the solution. The above ultrafiltration operation was repeated three times. About 2,000 ml of ion-exchanged water was added to the obtained filtrate, and about 2,000 ml of the solution was removed by ultrafiltration. This ultrafiltration operation was repeated three times. The water in the resulting solution was removed under reduced pressure to obtain a colorless polystyrenesulfonic acid solid.

(Production Example 5) Synthesis of polystyrene sulfonic acid doped poly (3,4-ethylenedioxythiophene) (PSS-PEDOT)

14.2 g of 3,4-ethylenedioxythiophene and 36.7 g of polystyrenesulfonic acid synthesized in Production Example 4 were dissolved in 2,000 ml of ion-exchanged water at 20 占 폚. 29.64 g of ammonium persulfate dissolved in 200 ml of ion-exchanged water and 8.0 g of ferric sulfate ferrous sulfate catalyst solution were slowly added while stirring the mixture solution while maintaining the resulting mixed solution at 20 ° C and stirred for 3 hours Lt; / RTI &gt; To the reaction solution obtained, 2,000 ml of ion-exchanged water was added, and about 2,000 ml of the solution was removed by ultrafiltration. This operation was repeated three times. Then, 200 ml of sulfuric acid diluted to 10% by weight and 2,000 ml of ion-exchanged water were added to the obtained solution, about 2,000 ml of the solution was removed by ultrafiltration, 2,000 ml of ion-exchanged water was added thereto , And about 2,000 ml of the solution was removed by ultrafiltration. This operation was repeated three times. Further, 2,000 ml of ion-exchanged water was added to the obtained solution, and about 2,000 ml of the solution was removed by ultrafiltration. This operation was repeated five times to obtain an aqueous solution of 1.5 wt% of blue polystyrene sulfonic acid doped poly (3,4-ethylenedioxythiophene) (PSS-PEDOT).

(Production Example 6) Preparation of polystyrene sulfonic acid doped poly (3,4-ethylenedioxythiophene) (PSS-PEDOT) in isopropyl alcohol dispersion liquid C

100 g of an aqueous dispersion of 1.5% by weight of polystyrene sulfonic acid doped poly (3,4-ethylenedioxythiophene) (PSS-PEDOT) synthesized in Production Example 5 was placed in a flask, 100 g of isopropyl alcohol was added, 0.5 ml of hydrochloric acid was added. After that, stirring was continued for 30 minutes and then left for 1 hour. The obtained gel-like substance was filtered under reduced pressure using a glass filter, and then 200 g of isopropyl alcohol was added and filtration under reduced pressure was repeated eight times. The solid component was removed from the glass filter in a state that the solid component was not completely dried, and the weight of solid component was calculated from the weight loss of heating to obtain 15 g of a wet blue solid having a solid content of 7.8%. 15 g of isopropyl alcohol was taken as a beaker, and 0.4 g of an amine alkylene oxide adduct (trade name: Esomen C / 15, Lion arc irradiator) was added. 15 g of the resulting wet blue solid was added, PSS-PEDOT isopropyl alcohol dispersion (liquid C) (solid content concentration 5%, water content 20%) was obtained by performing treatment for 10 minutes at a rotation speed of 4,000 rpm using a stirrer (trade name: TK HOMODISPER, Below).

The average particle diameter of the obtained PSS-PEDOT isopropyl alcohol dispersion (solid concentration: 5%, water content: 20% or less) was measured in a monodisperse mode using a nano-truck particle diameter distribution measurement apparatus UPA-EX150 (manufactured by Nikkiso Co., Ltd.). Here, the average particle diameter (d50) was 20 nm and the d90 was 40 nm.

(Production Example 7) Production example of copolymer D solution containing quaternary ammonium base

A flask equipped with a stirrer, a nitrogen gas introducing tube, a thermometer and a reflux condenser was charged with 40 g of n-butyl methacrylate, 50 g of Light Ester DQ-100 (manufactured by Kyowa Chemical Co., Ltd.) 5 g of acrylate, 5 g of acrylic acid, 60 g of methanol, and 60 g of methyl cellosolve were poured into the flask, and nitrogen gas was introduced into the flask while stirring with stirring for 30 minutes, after which the content in the flask was heated to 75 캜. Then, 0.5 g of AIBN (azobisisobutyronitrile) was added into the flask. 0.5 g of AIBN was added twice per hour while maintaining the contents in the flask at 75 占 폚. After 9 hours from the addition of the first AIBN, the solution was cooled to room temperature to obtain a copolymer D solution containing a quaternary ammonium base having a polymer concentration of 45%. Measurement of the obtained copolymer by GPC was carried out, and the weight average molecular weight was 100,000. The SP value of the polymer was measured to be 12.15.

[Example 1]

A predetermined mixture as shown in Table 1 containing the layered organic clay A, the ionizing radiation curable fluorinated acrylate B liquid, and the PSS-PEDOT isopropyl alcohol dispersion C liquid was stirred for 30 minutes in a disperser to obtain an optical functional layer coating (Line speed: 20 m / min) onto one side of a transparent base TAC film (TD80UL, manufactured by Fuji Photo Film Co., Ltd.) having a thickness of 80 탆 and a total light transmittance of 92% (Lamp: condenser type high-pressure mercury lamp, lamp output: 120 W / cm, number of lamps: 4, etc., irradiation distance: 20) in a nitrogen atmosphere (nitrogen gas replacement) after preliminary drying Cm) was performed to cure the coating film. Thus, an optical laminate of Example 1 having an optical function layer with a thickness of 5.5 탆 was obtained.

[Example 2]

An optical laminated body of Example 2 having an optical function layer with a thickness of 5.8 탆 was obtained in the same manner as in Example 1 except that the optical function layer-forming coating material was changed to a predetermined mixed liquid as shown in Table 1.

[Comparative Example 1]

Comparative Example 1 having an optical function layer having a thickness of 4.0 占 퐉 was prepared in the same manner as in Example 1 except that the optical functional layer-forming coating material was changed to a predetermined mixed solution as shown in Table 1 containing a quaternary ammonium base- Was obtained.

[Comparative Example 2]

An optical laminate of Comparative Example 2 having an optical function layer having a thickness of 5.6 탆 was obtained in the same manner as in Example 1 except that the optical function layer-forming coating material was changed to a predetermined mixed liquid solution containing no conductive material .

number ingredient Company Name product name Weight portion Example 1 Ionizing radiation curable fluorinated acrylate - B solution 0.13 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 42.17 Dipentaerythritol hexaacrylate Japanese gunpowder KAYARAD DPHA 13.71 Pentaerythritol triacrylate Japanese gunpowder KAYARAD PET-30 34.46 Photopolymerization initiator Chiba Japan Irgacure 184 4.72 PSS-PEDOT isopropyl alcohol dispersion
(Average particle diameter: 20 nm) - C solution (5%) 47.91 Layered organic clay A - - 0.40 PMMA particles (particle diameter 1.5 탆) - - 2.00 toluene - - 29.18 Isopropyl alcohol - - 52.34 Example 2 Ionizing radiation curable fluorinated acrylate - B solution 0.13 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 23.75 Dipentaerythritol hexaacrylate Japanese gunpowder KAYARAD DPHA 13.50 Pentaerythritol tetraacrylate Kyoeisha Chemical Light acrylate
PE-4A 7.27 Pentaerythritol polyacrylate Arakawa Chemical Beam set 710 44.65 PMMA particles (particle diameter: 5 mu m) - - 4.50 Photopolymerization initiator Chiba Japan Irgacure 184 4.60 PSS-PEDOT isopropyl alcohol dispersion
(Average particle diameter: 20 nm) - C solution (5%) 32.00 toluene - - 36.67 Isopropyl alcohol - - 55.15 Comparative Example 1 Quaternary ammonium base copolymer (45%) - D solution 18.00 Pentaerythritol triacrylate Kyoeisha Chemical Light acrylate
PE-3A 82.15 Photopolymerization initiator Chiba Japan Irgacure 184 4.75 Silica particles Fuji Silysia
chemistry Silo Spare C1504 2.25 Dispersant
(Carboxyl group-containing polymer modified product) Kyoeisha Chemical Pro Rolen G700 0.25 Propylene glycol monomethyl ether - - 89.00 Butanol - - 14.17 Comparative Example 2 Ionizing radiation curable fluorinated acrylate - B solution 0.13 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 42.17 Dipentaerythritol hexaacrylate Japanese gunpowder KAYARAD DPHA 13.71 Pentaerythritol triacrylate Kyoeisha Chemical Light acrylate
PE-3A 36.88 Photopolymerization initiator Chiba Japan Irgacure 184 4.72 Layered organic clay A - - 0.40 PMMA particles (particle diameter 1.5 탆) - - 2.00 toluene - - 29.18 Isopropyl alcohol - - 97.87

(Production Example 8) Synthesis of ionizing radiation-curable fluorinated acrylate E solution

In a 500 ml reaction flask, a solution of 59.6 g (0.20 mol) of pentaerythritol triacrylate was added to a solution of 22.2 g (0.1 mole) of isophorone diisocyanate in 100 ml of MIBK (methyl isobutyl ketone) Ml &lt; / RTI &gt; was added dropwise at 25 deg. After completion of the dropwise addition, 0.3 g of dibutyltin dilaurate was added, and further heating stirring was carried out at 70 DEG C for 4 hours. After completion of the reaction, the reaction solution was washed with 100 ml of 5% hydrochloric acid. After collecting the organic layer, the solvent was distilled off under reduced pressure at 40 DEG C or lower to obtain 80.5 g of urethane acrylate as a colorless transparent viscous liquid. 40.8 g (0.05 mol) of the urethane acrylate, 42 g (0.15 mol) of perfluorobutylethyl mercaptan, and 60 g of MIBK were added to a 200 ml reaction flask and homogenized. To this mixed solution was gradually added 1.0 g of triethylamine at 25 占 폚. After the addition, the mixture was further stirred at 50 캜 for 3 hours. After completion of the reaction, triethylamine was distilled off under reduced pressure using an evaporator at a temperature of 50 캜 or lower, and further dried with a vacuum pump to obtain a urethane acrylate containing a fluorinated alkyl group represented by a structural formula 2, An ionizing radiation-curable fluorinated acrylate E solution consisting of a mixture further comprising a compound different from the above-mentioned structural formula 2 in the position of addition reaction with perfluorobutyl ethyl mercaptan was obtained.

Molecular Weight; 1,659

Fluorine atom content; 30.9%

(Production Example 9) Synthesis of ionizing radiation-curable fluorinated acrylate F liquid

150.0 g of perfluorohexylethylmercaptan, 30.0 g of thioferric acid, 1.5 g of concentrated sulfuric acid and 200 ml of toluene were fed into a 500 ml flask equipped with a stirrer and a Dean-stark trap, Heat reflux was carried out until the water (7.1 g) could be removed. After cooling to 60 캜, 20 g of slaked lime was added and stirred at the same temperature for 30 minutes. After filtration, the toluene was distilled off under reduced pressure to obtain 168.0 g of thiomalonic acid di (perfluorohexyl ethyl ester) as a yellow transparent viscous liquid.

17.0 g (0.05 mol) of pentaerythritol tetraacrylate (ARONIX M-450 manufactured by Donga Synthetic Co., Ltd.), 43.7 g (0.05 mol) of thioalcohol di (perfluorohexyl ethyl ester) g, and 1.0 g of triethylamine was slowly added thereto at 50 占 폚 under stirring. After the addition, the mixture was further stirred at 50 캜 for 3 hours. After completion of the reaction, ethyl acetate and triethylamine were distilled off under reduced pressure at 50 DEG C or lower, and then further dried with a vacuum pump to obtain 25.0 g of the fluorinated alkyl group-containing acrylate F solution represented by the following structural formula 3.

Molecular Weight; 1,162

Fluorine atom content; 42.5%

(Production Example 10) Synthesis of Fluorine Surfactant G Solution

19 parts by weight of a fluorinated alkyl group-containing (meth) acrylate monomer (structural formula 4), 30 parts by weight of an ethylenically unsaturated monomer having a branched aliphatic hydrocarbon group (structural formula 5), and 100 parts by weight of a 39 parts by weight of a monoacrylate compound having a copolymer of ethylene oxide and propylene oxide in its side chain, 4 parts by weight of a methacrylated compound of both ends of tetraethylene glycol, 8 parts by weight of methyl methacrylate, And 350 parts by weight of an alcohol (hereinafter abbreviated as IPA) were added, and 1 part by weight of azobisisobutyronitrile (hereinafter abbreviated as AIBN) as a polymerization initiator in a nitrogen gas stream under reflux and 10 parts by weight of lauryl mercaptan 10 , And the mixture was refluxed at 85 DEG C for 7 hours to complete the polymerization to obtain a fluorinated oligomer. The polystyrene reduced molecular weight of this polymer by gel permeation chromatography (hereinafter abbreviated as GPC) was Mn = 5,500. The content of fluorine atoms was 11.8%. This copolymer is used as the fluorine-based surfactant G solution.

(Production Example 11) Synthesis of ATO-containing ultraviolet curable resin H liquid

130 g of potassium stannate and 30 g of antimonyl potassium stannate were dissolved in 400 g of pure water to prepare a mixed solution. The prepared solution was hydrolyzed over a period of 12 hours by adding 1.0 g of ammonium nitrate and 12 g of 15% ammonia water under stirring to 1,000 g of pure water dissolved. At this time, a 10% nitric acid solution was added at the same time to maintain the pH at 9.0. The resulting precipitate was washed with water and then dispersed again in water to prepare a metal oxide precursor hydroxide dispersion having a solid content concentration of 20% by weight. This dispersion was spray-dried at a temperature of 100 ° C to prepare a metal oxide precursor hydroxide powder. This powder was subjected to heat treatment at 550 DEG C for 2 hours in an air atmosphere to obtain Sb doped tin oxide (ATO) powder.

60 g of this powder was dispersed in 140 g of an aqueous potassium hydroxide solution having a concentration of 4.3% by weight, and the dispersion was pulverized for 3 hours by a sand mill while maintaining the temperature at 30 캜 to prepare a sol. Next, this sol was subjected to a dealkalizing ion treatment until the pH became 3.0 with an ion exchange resin, and then pure water was added thereto to prepare an ATO dispersion having a solid content concentration of 20% by weight. The pH of this ATO dispersion was 3.3. The average particle diameter of the ATO fine particles was 10 nm.

Then, 100 g of the ATO dispersion was adjusted to 25 占 폚, and 4.0 g of tetraethoxysilane (ethyl silicate, manufactured by Tama Chemical Co., Ltd., concentration of SiO _2: 28.8 wt%) was added for 3 minutes , Followed by stirring for 30 minutes. Thereafter, 100 g of ethanol was added over 1 minute, and the temperature was elevated at 50 占 폚 for 30 minutes and then the superheating treatment was performed for 15 hours. The solid content concentration at this time was 10% by weight.

Subsequently, water and ethanol as a dispersion medium were replaced with ethanol in the ultrafiltration membrane to prepare an ATO dispersion whose surface was treated with an organic silicon compound having a solid concentration of 30% by weight.

13.1 g of the ATO dispersion surface-treated with the organosilicon compound, 25.6 g of pentaerythritol triacrylate (PE-3A manufactured by Kyowa Chemical Co., Ltd.), 17.1 g of urethane acrylate (UA306I, manufactured by Kyowa Chemical Industry Co., Ltd.) 2.5 g of Ciba Specialty Chemicals Co., Ltd., Ciba Japan Co., Ltd., IRGACURE 184), 34.2 g of ethanol and 7.5 g of toluene were mixed and mixed in a paint shaker for 30 minutes to obtain an ATO-containing ultraviolet curable resin H solution having a solid content concentration of 49% by weight.

[Example 3]

A predetermined mixture shown in Table 2 containing the ionizing radiation curable fluorinated acrylate liquid B and the ATO containing ultraviolet curing type resin H liquid was stirred for 30 minutes in a disperser to obtain a coating for forming an optical functional layer having a thickness of 80 탆, (Line speed: 20 m / min) on one side of a transparent gas TAC film (TD80UL, manufactured by Fuji Photo Film Co., Ltd.) having a transmittance of 92%, preliminarily dried at 30 to 50 캜 for 20 seconds, And the coating film was dried for one minute and irradiated with ultraviolet rays (lamp: condensing type high pressure mercury lamp, lamp output: 120 W / cm, number of lamps: 4, etc., irradiation distance: 20 cm) in a nitrogen atmosphere And cured. Thus, an optical laminate of Example 3 having an optical function layer with a thickness of 7.3 mu m was obtained.

[Example 4]

Except that the optical functional layer-forming coating material was changed to a predetermined mixture liquid as shown in Table 2 containing the ionizing radiation-curable fluorinated acrylate liquid B and the ATO-containing ultraviolet-curing resin H liquid, to a thickness of 7.2 탆 Of the optical functional layer of Example 2 was obtained.

[Example 5]

Except that the optical functional layer-forming coating material was changed to a predetermined mixture liquid as shown in Table 2 containing the ionizing radiation-curable fluorinated acrylate liquid E and the ATO-containing ultraviolet-curing resin H liquid, to a thickness of 7.3 탆 Of the optical functional layer of Example 5 was obtained.

[Example 6]

Except that the optical functional layer-forming coating material was changed to a predetermined mixed liquid as shown in Table 2 containing the ionizing radiation-curable fluorinated acrylate F liquid and the ATO-containing ultraviolet-curing resin H liquid, to a thickness of 7.2 탆 Of the optical functional layer of Example 6 was obtained.

[Comparative Example 3]

Except that the optical functional layer-forming coating material was changed to a predetermined mixed liquid as shown in Table 2 containing LINC-3A manufactured by Kyowa Chemical Industry Co., Ltd. and ionic liquid-curable resin containing liquid H containing ATO as ionizing radiation curable acrylate, To obtain an optical laminate of Comparative Example 3 having an optical function layer with a thickness of 7.2 mu m. The structural formula of LINC-3A is shown below. LINC-3A is a mixture of the structural formulas 6 and 7 (structural formula 6): (structural formula 7) = 65: 35 (weight ratio).

Triacryloyl-heptadecafluorononenyl pentaerythritol

Molecular Weight; 728

Fluorine atom content; 44.3%

Pentaerythritol tetraacrylate

[Comparative Example 4]

Except that the optical functional layer-forming coating material was changed to a predetermined mixture liquid as shown in Table 3, which contained fluorine-based surfactant G liquid as the fluorine-containing acrylate, not ionizing radiation-curable type, and H liquid containing the ATO-containing ultraviolet-curing resin, To obtain an optical laminate of Comparative Example 4 having an optical function layer with a thickness of 7.3 mu m.

[Comparative Example 5]

(Light acrylate FA-108 made by Kyowa Chemical Co., Ltd.) and ATO-containing ultraviolet-curing resin H as the ionizing radiation curing type fluoroacrylate The optical laminate of Comparative Example 5 having an optical function layer with a thickness of 7.4 占 퐉 was obtained in the same manner as in Example 3 except that the liquid mixture was changed to a predetermined mixed liquid as shown in Table 3. The structural formula of 2- (perfluorooctyl) -ethyl acrylate is shown below (structural formula 8).

Molecular Weight; 518

Fluorine atom content; 62.4%

[Comparative Example 6]

Except that the optical functional layer-forming coating material was changed to a predetermined mixed liquid solution as shown in Table 3 containing an ionizing radiation-curable resin H solution containing no ionizing radiation curing type fluorinated acrylate and having an ATO content of 7.3 탆 An optical laminate of Comparative Example 6 having an optical functional layer was obtained.

[Comparative Example 7]

Except that the optical functional layer-forming coating material was changed to the predetermined mixed liquid liquid shown in Table 3 containing the ionizing radiation-curable fluorinated acrylate liquid B and the quaternary ammonium base-containing copolymer D liquid, to obtain a thickness of 7.3 Mu m of the optically functional layer was obtained.

[Comparative Example 8]

Comparative Example 8 having an optical functional layer having a thickness of 7.3 탆 was prepared in the same manner as in Example 3 except that the optical functional layer-forming coating material was changed to the predetermined mixed liquid solution shown in Table 3 containing the ionizing radiation curing type fluorinated acrylate liquid B. Was obtained.

number ingredient Company Name product name Weight portion Example 3 Ionizing radiation curable fluorinated acrylate - B solution 0.31 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.45 Pentaerythritol triacrylate Japanese gunpowder KAYARAD PET-30 0.45 Photopolymerization initiator Chiba Japan Irgacure 184 0.06 ATO-containing ultraviolet curable resin - H solution (49%) 77.52 PMMA particles (particle diameter 1.5 탆) - - 3.90 toluene - - 9.71 IPA - - 7.60 Example 4 Ionizing radiation curable fluorinated acrylate - B solution 0.21 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.31 Pentaerythritol triacrylate Kyoeisha Chemical PET3A 0.31 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 ethanol - - 0.56 MEK - - 15.93 Example 5 Ionizing radiation curable fluorinated acrylate - E solution 0.21 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.31 Pentaerythritol triacrylate Japanese gunpowder KAYARAD PET-30 0.31 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 ethanol - - 0.56 MEK - - 15.93 Example 6 Ionizing radiation curable fluorinated acrylate - F solution 0.21 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.31 Pentaerythritol triacrylate Japanese gunpowder KAYARAD PET-30 0.31 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 ethanol - - 0.56 MEK - - 15.93 Comparative Example 3 Ionizing radiation curable fluorinated acrylate Kyoeisha Chemical LINC-3A 0.83 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 IPA - - 0.04 ethanol - - 0.48 Methanol - - 0.04 MEK - - 15.93

number ingredient Company Name product name Weight portion Comparative Example 4 Fluoric surfactant - G solution 0.21 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 Toulouse - - 0.10 IPA - - 0.04 ethanol - - 0.48 Methanol - - 0.04 MEK - - 15.93 Comparative Example 5 Ionizing radiation curable fluorinated acrylate Kyoeisha Chemical Light acrylate
FA108 0.21 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.31 Pentaerythritol triacrylate Japanese gunpowder KAYARAD PET-30 0.31 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 ethanol - - 0.56 MEK - - 15.93 Comparative Example 6 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.35 Pentaerythritol triacrylate Kyoeisha Chemical PET3A 0.48 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 ATO-containing ultraviolet curable resin - H solution (49%) 78.70 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 ethanol - - 0.56 MEK - - 15.93 Comparative Example 7 Ionizing radiation curable fluorinated acrylate - B solution 0.21 Quaternary ammonium base copolymer (45%) - D solution 7.80 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 0.31 Pentaerythritol triacrylate Japanese gunpowder KAYARAD PET-30 0.31 Photopolymerization initiator Chiba Japan Irgacure 184 0.04 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 0.10 ethanol - - 0.56 MEK - - 15.93 Comparative Example 8 Ionizing radiation curable fluorinated acrylate - B solution 0.21 Polyfunctional urethane acrylate Kyoeisha Chemical UA306I 21.30 Pentaerythritol triacrylate Kyoeisha Chemical PE-3A 15.00 Photopolymerization initiator Chiba Japan Irgacure 184 2.10 PMMA particles (particle diameter 1.5 탆) - - 3.92 toluene - - 11.03 ethanol - - 15.50 MEK - - 30.93

<Evaluation method>

Next, evaluation was conducted on the following items with respect to the optical laminate of Examples and Comparative Examples.

(Saponification treatment)

The saponification treatment of the optical laminate is carried out in the following order. The contact angle of water on the surface of the TAC film constituting the optical laminate was measured. It was confirmed that the saponification treatment was properly carried out since the saponification treatment had a saponification degree of not less than 55 deg. After the saponification treatment.

(1) Immersed in a 6% sodium hydroxide aqueous solution at 55 占 폚 for 2 minutes.

(2) Washing for 30 seconds.

(3) Immersed in sulfuric acid at 35 ° C for 0.1 second.

(4) Washing for 30 seconds.

(5) Dry hot air at 120 캜 for 1 minute.

The surface resistivity (R 1) and the surface resistivity (R 3) after the saponification treatment were measured for each of the optical laminate obtained at the initial stage (the stage in which the saponification treatment and the weather resistance test were not performed). Here,? / R &lt; 1/10 &gt;

(Light resistance test)

The light resistance test was carried out under the following conditions.

Tester; Carbon arc light resistance tester (light resistance tester manufactured by Suga Tester Co., Ltd.)

Product Name; "UV auto fade meter U48AU-B")

Exam conditions; Black panel temperature; 50 ± 5 ° C

Radiation illuminance; 500 W / m &lt; 2 &gt; (measurement wavelength range 300 to 700 nm)

Irradiation time; 80 hours

The surface resistivity (R1) of the optical laminate thus obtained at the initial stage (the stage not subjected to the saponification treatment and the weather resistance test) and the surface resistivity (R2) after the carbon arc light resistance test were measured. That R2 / R1 is less than or equal to 10 ⁴ ○, it was to exceed the 10 to ⁴ ×. The surface resistivity (R1), the saponification treatment and the surface resistivity (R4) after the carbon arc light resistance test were measured for the optical laminate thus obtained at the initial stage (the stage not subjected to the saponification treatment and the weather resistance test). The R4 / R1 is less than or equal to 10 ⁴ ○, it was to exceed the 10 to ⁴ ×.

(Total light transmittance)

The total light transmittance was measured in accordance with JIS K7105 using a haze meter (trade name: NDH2000, manufactured by Nihon Furukawa Co., Ltd.).

(Haze value)

The haze value was measured in accordance with JIS K7105 using a haze meter (trade name: NDH2000, manufactured by Nihon Furukawa Co., Ltd.). The haze in the table is the value of the total haze.

(Average roughness of surface roughness and unevenness)

The surface roughness Ra and the average spacing Sm of the concave and the convex were measured according to JIS B0601-1994 using a surface roughness meter (trade name: Surfcoder SE1700 alpha, manufactured by Kosaka Laboratory Co., Ltd.).

(Average inclination angle)

The mean tilting angle was calculated according to ASME95 using a surface roughness tester (trade name: Surfcoder SE1700 alpha, manufactured by Kosaka Laboratory Co., Ltd.) and the average tilting angle was calculated according to the following formula.

Average slope angle = tan ^-1 (average slope)

(Image sharpness)

The measuring instrument was set to the transmission mode using a mismatch measuring instrument (trade name: ICM-1DP, manufactured by Suga Test Instruments) according to JIS K7105, and the measurement was made at an optical comb width of 0.5 mm.

(Repellency)

The visibility was evaluated as &amp; cir &amp; when the image sharpness value was 0 to 80, and &amp; cir &amp;

(Surface resistivity)

The surface resistivity was measured according to JIS K6911 using a high resistivity meter (trade name: Hiresta-UP, manufactured by Mitsubishi Chemical). The measurement was carried out under the conditions of 20 ° C and 65% RH after the sample was humidified (conditioned) at 20 ° C and 65% RH for 1 hour. The surface resistivity was measured from the surface side of the optical functional layer of the optical laminate at an applied voltage of 250 V and an application time of 10 seconds.

When 1.0 × 10 ⁹ Ω / □ or less ^{◎, 1.0 × 10 9 Ω /} □ when more than 1.0 × 10 ¹⁰ Ω / □ or less ^{○, 1.0 × 10 10 Ω /} □ when more than ~1.0 × 10 ¹² Ω / □ or less △, And when it exceeds 1.0 x 10 &lt; ¹² &gt;

(Saturation voltage)

The saturation voltage was measured in accordance with JIS L1094 under the conditions of an applied voltage of 10 kV, a distance of 20 mm, a temperature of 25 DEG C and a relative humidity of 40% RH using a static ONESTOMETER H-0110 (manufactured by Seishi Electric Co., Ltd.).

(Scratch resistance)

Steel wool # 0000 manufactured by Nihon Steel Wool Co., Ltd. was mounted on an abrasion tester (Abrasion Tester, Model; 339 manufactured by Fu Chien Co., Ltd.), and the optical function layer surface was reciprocated 10 times at a load of 250 g / cm 2. Thereafter, wounds on the abraded portion were confirmed under a fluorescent lamp. The number of injuries was 0, the number of injuries was less than 1 to 10, the number of injuries was less than 10 to 30, and the number of injuries was 30 or more.

(Bright room contrast)

The bright room contrast was applied to the surface of the screen of a liquid crystal display device (trade name: LC-37GX1W, manufactured by Sharp Corporation) through a colorless transparent adhesive layer on the surface opposite to the surface of the optical function layer in the optical laminate of Examples and Comparative Examples, The luminance when the liquid crystal display device was turned to the white display and the black display after the luminance of the surface of the liquid crystal display surface was 200 lux was measured with a fluorescent lamp (trade name: HH4125GL, National) in the direction of 60 degrees above the front of the display device screen (Cd / m 2) in the black display and the luminance (cd / m 2) in the white display obtained by the measurement were measured with a colorimetric luminance meter (trade name: BM-5A, Topcon) X value when the value was 800 or less, and &amp; cir &amp; when the value was 801 or more.

Contrast = luminance of white display / luminance of black display

(Darkroom contrast)

The darkroom contrast was applied to the surface of the screen of a liquid crystal display device (trade name: LC-37 GX1W, manufactured by Sharp Corporation) through a colorless transparent adhesive layer on the surface opposite to the surface of the optical function layer in the optical laminate of Examples and Comparative Examples, (Cd / m &lt; 2 &gt;) of the obtained black display and the luminance (cd / m &lt; 2 &gt;) of the obtained black display were measured with a color luminance meter (trade name: BM- The value when the luminance (cd / m 2) at the time of white display was calculated by the following formula was 900 when the luminance was 1,100, the luminance was 1,101 to 1,300, and the luminance was 1,301 to 1,500.

Contrast = luminance of white display / luminance of black display

The results obtained for Examples 1 and 2 and Comparative Examples 1 and 2 are shown in Tables 4 and 5.

As described above, according to the present invention, it is possible to provide an optical laminate, a polarizing plate, and a display device using the same, which has excellent antistatic performance in a one-layer structure and is excellent in saponification resistance, light resistance and scratch resistance.

For Examples 3 to 6 and Comparative Examples 3 to 8, the following evaluation was conducted in addition to the above.

(Contact angle)

The contact angle of water on the surface of the optically functional layer was measured. Next, the contact angle of water on the surface of the saponified optical functional layer was measured. The contact angle of water was measured using a contact angle meter (trade name: Hermma G-1 type contact angle meter, manufactured by Hermasma) in accordance with JIS R3257 (wettability test method of substrate glass surface).

(flash)

The liquid crystal display (trade name: LC-32GD4, manufactured by Sharp Corporation) having a resolution of 50 ppi and a liquid crystal display having a resolution of 100 ppi were formed on the opposite side of the optical laminate formation side of each of the Examples and Comparative Examples through a colorless transparent adhesive layer, (Product name: VGN-TX72B, manufactured by Sony Corporation) having a resolution of 120 ppi and a liquid crystal display (trade name: LC-37GX1W, manufactured by Sharp Corporation) And a liquid crystal display (trade name: PC-CV50FW, manufactured by Sharp Corporation) having a resolution of 200 ppi and a liquid crystal display (trade name: nw8240-PM780, manufactured by Hewlett Packard Co., Ltd.) having a resolution of 150 ppi. The value of the resolution when the luminance unevenness is not confirmed in an image photographed with a CCD camera (CV-200C, manufactured by KEENCE) having a resolution of 200 ppi in the normal direction of each liquid crystal TV after the liquid crystal display is displayed in green is set to 0 X at 50 ppi, 51 to 100 ppi, ◯ when 101 to 140 ppi, and ◎ when it was between 141 and 200 ppi.

(Antifouling maki (registered trademark) test)

A 3 cm long line was drawn on the optical functional layer of the fabricated optical stacker with a planetary pen (trade name: Makie (registered trademark), made by ZEBRA) and left for 1 minute. Thereafter, a clean wiper (part number: FF-390C Kuraru Kura Flex Manufactured by Kokusan Co., Ltd.). The rubbing was carried out with a load of 500 g / cm 2 for 20 reciprocations 20 times, the case where it was completely wiped, the case where there was a part which could not be wiped, and the case where it was impossible to wipe it at all.

(Macbeth concentration)

The Macbeth reflection density was measured using a Macbeth reflection densitometer (trade name: RD-914, manufactured by Sakata Engineering Co., Ltd.) according to JIS K7654, and the surface opposite to the resin layer of the light- ), And the Macbeth reflection density on the surface of the resin layer was measured.

(Gloss level)

The polish degree was measured with a gloss meter (trade name: VG2000, manufactured by Nippon Sumitomo Co., Ltd.) according to JIS Z8741 at a mirror gloss of 60 °.

The results obtained for Examples 3 to 6 and Comparative Examples 3 to 8 are shown in Table 6. The data in the table are the results of measuring the optical laminate before the saponification treatment, unless otherwise specified.

Table 7 shows experimental results on light resistance for Examples 3 to 6 and Comparative Example 8.

INDUSTRIAL APPLICABILITY As described above, according to the present invention, it is possible to provide an optical laminate having excellent antistatic properties, light resistance, and excellent anti-saponification property, and a display device using the same.

1 optical laminate
10 Translucent gas
20 optically functional layer
21 Surface Layer

Claims (13)

Wherein the optical functional layer has a thickness of 1.0 to 12.0 占 퐉, and the thickness of the optical functional layer is in the range of 1.0 to 12.0 占 퐉, Wherein the surface resistivity of the surface of the optical laminate after the carbon arc light resistance test is 1.0 10 ¹² ? /? Or less and the ratio of the surface resistivity before and after the carbon arc light resistance test (R2 / R1; R1 = Surface resistivity, R2 = surface resistivity after carbon arc light resistance test) is 10 ⁴ or less. The method according to claim 1,
Wherein the saturation electrification voltage after the carbon arc light resistance test is 1.5 kV or less. The method according to claim 1 or 2,
Wherein the optical functional layer further comprises at least one of light-transmitting fine particles or an inorganic component capable of forming a concavo-convex structure by agglomeration. delete The method according to claim 1,
Wherein the conductive material is a conductive metal oxide,
Wherein the optical functional layer is a layer obtained by curing a composition containing at least the ionizing radiation-curable fluorinated acrylate and the conductive metal oxide,
Wherein the ionizing radiation curable fluorinated acrylate has a molecular weight of 1,000 or more and further contains three or more acryloyl groups. The method according to claim 1 or 5,
Wherein the ionizing radiation-curable fluorinated acrylate contains a perfluoroalkyl group. The method of claim 5,
Wherein the ionizing radiation-curable fluorinated acrylate has a fluorine atom content of 20% or more. The method according to claim 1 or 5,
Wherein the ionizing radiation-curable fluorinated acrylate is a compound represented by the following formula (A).

Wherein Cy is a cycloalkyl moiety of a 5 or 6 membered ring in which a part of the hydrogen is substituted by a substituent of the above formula and optionally a methyl group or an ethyl group, a is an integer of 1 to 3, X is a methylene group or a direct bond , R _F is a perfluoroalkyl group having 4 to 9 carbon atoms, and n is an integer of 1 to 3. However, when a is 2 or more, X, R _F , and n are independently selected from each other. The method according to claim 1 or 5,
Wherein the ionizing radiation-curable fluorinated acrylate is urethane acrylate. The method according to claim 1,
Wherein the conductive material is a? -Conjugated conductive polymer,
Wherein the optical functional layer contains a complex of the? -Conjugate-based conductive polymer and a polymeric impurity (dopant). The method according to claim 1,
And the surface resistivity after the saponification treatment is 1.0 x ¹⁰ &lt; ¹⁰ &gt; A polarizing plate characterized in that the optical laminate according to claim 1 or 5 is laminated on a polarizing body. A display device comprising the optical laminate according to claim 1 or claim 5.

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