Antireflection film and low refractive index resin composition

Abstract

To provide an antireflection film which has small reflection of an external light source, is excellent in visibility, and has scratch resistance and water repellency of the same level without using PFAS.SOLUTION: In the antireflection film, a hard coat layer and a low refractive index layer are laminated in this order on a substrate film having light transmittance, the low refractive index layer is a cured layer of a low refractive index resin composition containing an amine-modified (meth) acrylate, hollow silica fine particles, nano-alumina particles, and a silicone-based leveling agent as essential components, the silicone-based leveling agent contains a polyether-modified polysiloxane, and the content of the silicone-based leveling agent is 13 to 23 wt% with respect to the total amount of the low refractive index layer.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to an antireflection film and a low refractive index resin composition used therein. [Background technology]

[0002] Anti-reflection films are widely used in image display devices, such as liquid crystal displays and organic electroluminescence displays, due to their excellent visibility and minimal reflection of external light sources such as fluorescent lights. In particular, devices that use a touch pen to input data onto the image display surface, such as touch panels, are increasingly required to have higher abrasion resistance and scratch resistance.

[0003] A well-known anti-reflection film has a laminated structure that reduces reflected light by canceling out light reflected from the surface of the anti-reflection layer (low refractive index layer) and light reflected at the interface between the anti-reflection layer and a layer adjacent to the anti-reflection layer (e.g., a hard coat layer). For example, the applicant previously invented an anti-reflection film having a low refractive index layer composed of a binder resin, hollow silica, alumina fine particles, and a fluorine-based silicone compound having a reactive functional group (Patent Document 1). This anti-reflection film had excellent properties, such as low reflection of external light sources and good anti-fouling and abrasion resistance.

[0004] Organic fluorine compounds (hereinafter referred to as PFAS), such as the "fluorine-based silicone compounds with reactive functional groups" used here, have high water repellency and improved scratch resistance, and their low refractive index also reduces reflectance, making them widely used in the low refractive index layer of anti-reflective films. However, PFAS are problematic due to their persistence and bioaccumulation, and there are moves to restrict their use, particularly in Europe. As a result, there is a growing demand for anti-reflective films that have low reflectance and the same levels of water repellency and scratch resistance without using PFAS. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 7354087 Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the present invention is to provide an anti-reflection film that has low reflection of external light sources and excellent visibility, and that has equivalent levels of scratch resistance and water repellency without using PFAS. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the invention of claim 1 provides an anti-reflection film characterized in that a hard coat layer and a low refractive index layer are laminated in this order on a light-transmitting substrate film, the low refractive index layer being a cured layer of a low refractive index resin composition containing, as essential components, an amine-modified (meth)acrylate (A), hollow silica fine particles (B), nanoalumina particles (C), and a silicone-based leveling agent (D), and the (D) contains a polyether-modified polysiloxane (d1) whose content is 13 to 23 wt % of the total amount of the low refractive index layer.

[0008] A second aspect of the present invention provides the antireflection film according to the first aspect, characterized in that the content of the amine-modified (meth)acrylate (A) is 0.5 to 8.0% by weight based on the total amount of the low refractive index layer.

[0009] The invention of claim 3 provides an anti-reflection film according to either claim 1 or 2, characterized in that the nano-alumina particles (C) include two types of particles having average particle diameters of 10 to 40 nm (c1) and 50 to 100 nm (c2).

[0010] The invention of claim 4 provides a low refractive index resin composition for anti-reflection films, comprising as essential components an amine-modified (meth)acrylate (A), hollow silica fine particles (B), nanoalumina particles (C), and a silicone-based leveling agent (D), wherein (D) contains a polyether-modified polysiloxane (d1), and the blending amount of (D) is 13 to 23 wt % based on the total amount of solids. [Effects of the Invention]

[0011] The film of the present invention has good visibility with little reflection of external light sources, and has equivalent water repellency and scratch resistance without using PFAS, making it useful as an environmentally friendly anti-reflection film for use in image display devices such as touch panels. BEST MODE FOR CARRYING OUT THE INVENTION

[0012] The anti-reflection film of the present invention has a structure in which a low refractive index layer (hereinafter referred to as a low refractive index layer) which is a cured product of a low refractive index resin composition (hereinafter referred to as a low refractive index resin composition) is laminated on a hard coat layer (hereinafter referred to as an HC layer) which is laminated on a light-transmitting substrate film. In this specification, (meth)acrylate includes both acrylate and methacrylate.

[0013] The low refractive index resin composition used in the present invention contains, as essential components, an amine-modified (meth)acrylate (A), hollow silica fine particles (B), nanoalumina particles (C), and a silicone-based leveling agent (D), in addition to a binder resin that disperses each component.

[0014] The amine-modified (meth)acrylate (A) used in the present invention is incorporated to mitigate polymerization inhibition by oxygen during UV curing and improve the degree of cure. (A) is a compound having at least one amino group and at least one acryloyl or methacryloyl group. A well-known method for avoiding curing inhibition by oxygen is exposure in an environment of inert gas such as nitrogen. However, in production processes involving high-speed transport, it is considered difficult to completely eliminate the effects of oxygen adhering to the exposed object. The incorporation of (A) significantly improves curability. The amino group may be a primary amino group, a secondary amino group, or a tertiary amino group, but a tertiary amino group is preferred in terms of curing acceleration.

[0015] Examples of (A) include amino(meth)acrylates, amine-modified aliphatic (meth)acrylates, amine-modified polyether (meth)acrylates, amine-modified polyester (meth)acrylates, amine-modified epoxy (meth)acrylates, and amine-modified urethane (meth)acrylates, which can be used alone or in combination of two or more. Among these, amine-modified polyether acrylates are preferred because of their high reactivity.

[0016] The number of functional groups in (A) is preferably 2 to 8, more preferably 2 to 6, and particularly preferably 2 to 4. By setting the number within this range, it is possible to improve surface hardness and scratch resistance without increasing cure shrinkage. An example of a commercially available product is EBECRYL80 (trade name: manufactured by Daicel Allnex Corporation, tertiary amine tetrafunctional).

[0017] The blending amount of (A) is preferably 0.8 to 9 wt. % of the total solid content of the low refractive index resin composition, more preferably 1.0 to 8 wt. %, and particularly preferably 1.2 to 6 wt. By making it 0.8 wt. % or more, sufficient scratch resistance can be ensured, and by making it 9 wt. % or less, low haze and good optical properties can be ensured. The blending amount of (A) is preferably 5 to 70 wt. % of the total binder resin excluding (A), more preferably 8 to 50 wt. %, and particularly preferably 10 to 40 wt.

[0018] The hollow silica particles (B) used in the present invention are blended for the purpose of lowering the refractive index of the low refractive index layer. (B) are silica particles that have internal cavities containing air with a refractive index of 1, and have the function of lowering the refractive index of the low refractive index layer while maintaining the coating strength of the layer. While the refractive index of solid silica particles is about 1.45, the refractive index of (B) decreases as the occupancy rate of the internal cavities increases, and is about 1.15 to 1.40.

[0019] The average primary particle size of (B) is preferably 5 to 100 nm, more preferably 20 to 80 nm, and particularly preferably 40 to 70 nm. By setting it within this range, good dispersibility can be obtained without impairing the transparency of the low refractive index layer. In particular, a size of 40 to 70 nm can ensure a sufficient shell thickness for sufficient strength while increasing the void occupancy rate and efficiently lowering the refractive index. The average particle size is the median diameter (d=50) measured by a laser diffraction / scattering method in accordance with JIS Z 8825-1.

[0020] The blending amount of (B) is preferably 30 to 60% by weight, more preferably 35 to 55% by weight, and particularly preferably 40 to 52% by weight, based on the total solid content of the low refractive index resin composition. By making it 30% by weight or more, the refractive index can be sufficiently lowered to reduce the reflectance, and by making it 60% by weight or less, sufficient scratch resistance can be ensured. An example of a commercially available product is Sururia 4320 (trade name: manufactured by JGC Catalysts and Chemicals, solid content 20.5%, average primary particle size 60 nm).

[0021] The nano-alumina particles (C) used in the present invention are blended to increase the hardness of the low-flexibility layer and improve abrasion resistance. The average primary particle diameter of (C) is preferably 5 to 100 nm, more preferably 10 to 90 nm. By making it 5 nm or more, improved abrasion resistance can be expected, and by making it 100 nm or less, an increase in haze can be suppressed and sufficient total light transmittance can be ensured.

[0022] The (C) preferably uses two types of particles with different average particle diameters: a smaller particle diameter (c1) and a larger particle diameter (c2). By using two different particle diameters, the amount of (C) that can be blended can be increased, further improving scratch resistance. In this case, the average primary particle diameter of (c1) is preferably 5 to 40 nm, more preferably 10 to 30 nm. The average primary particle diameter of (c2) is preferably 50 to 100 nm, more preferably 60 to 90 nm.

[0023] The blending amount of (C) is preferably 8 to 20 wt % of the total solid content of the low refractive index resin composition, more preferably 10 to 18 wt %, and particularly preferably 11 to 15 wt %. By making it 8 wt % or more, sufficient abrasion resistance can be ensured, and by making it 20 wt % or less, sufficiently low reflectance can be ensured. Furthermore, when (c1) and (c2) are used in combination, the blending ratio of (c1) to the total amount of (C) is preferably 40 to 70 wt %, more preferably 50 to 60 wt %.

[0024] The silicone leveling agent (D) used in the present invention is blended to improve the leveling properties during application as well as the scratch resistance and water repellency of the cured film. Although PFAS has a similar effect even when added in small amounts, the applicant discovered through repeated trial and error that combining the above-mentioned (A) with a specific blend amount of (D) can achieve an effect equivalent to that of PFAS.

[0025] Examples of (D) include polyalkylsiloxanes, polyarylsiloxanes, polyalkylarylsiloxanes, polyester-modified polysiloxanes, and polyether-modified polysiloxanes, but at least a polyether-modified polysiloxane compound (d1) is essential. Examples of polyether-modified polysiloxanes include compounds having a polyether side chain, such as ethylene oxide or propylene oxide, on a side chain of a polydimethylsiloxane main chain. Furthermore, by having a reactive functional group, such as an acryloyl group, that can polymerize with a binder resin, the cured coating will not bleed over time, and the scratch resistance effect can be maintained for a long period of time.

[0026] As the (D), it is preferable to use other silicone-based leveling agents in addition to (d1). Among other silicone-based leveling agents, it is particularly preferable to use polyester-modified polysiloxane (d2) in combination. The use of (d2) in combination improves leveling properties and can improve the coating appearance. Examples of commercially available products of (d1) include BYK-UV3590 (trade name: BYK Chemie, acryloyl group-containing polyester-modified polydimethylsiloxane compound), and examples of commercially available products of (d2) include BYK-UV3570 (trade name: BYK Chemie, acryloyl group-containing polyester-modified polydimethylsiloxane compound).

[0027] The blending amount of (D) is 13 to 23 wt % of the total solid content of the low refractive index resin composition, preferably 15 to 22 wt %, and more preferably 16 to 21 wt %. If it is less than 13 wt %, sufficient scratch resistance and water repellency may not be ensured, and if it exceeds 23 wt %, haze may increase and good optical properties may not be obtained. Furthermore, when (d1) and (d2) are used in combination, the blending ratio of (d1) to the total amount of (D) is preferably 15 to 50 wt %, and more preferably 20 to 40 wt %.

[0028] The binder resin for the low refractive index resin composition of the present invention is not particularly limited. For example, oligomers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, polycarbonate (meth)acrylate, acrylic (meth)acrylate, and diene (meth)acrylate can be used alone or in combination of two or more.

[0029] As a component other than the oligomer, a low molecular weight binder may be used. Examples include (meth)acrylates and acrylamide compounds having an aliphatic, alicyclic, polyether skeleton, or functional groups such as hydroxyl groups and amino groups, which can be used alone or in combination of two or more. Examples include pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate (hereinafter referred to as DPHA).

[0030] The amount of binder resin is preferably 5 to 25% by weight, more preferably 10 to 20% by weight, based on the total solid content of the low refractive index resin composition. By adjusting the amount within this range, sufficient curability, good dispersibility, and various properties after curing can be ensured.

[0031] In the low refractive index resin composition of the present invention, it is preferable to use a photopolymerization initiator. The photopolymerization initiator generates radicals when irradiated with ultraviolet light or an electron beam, and these radicals trigger a polymerization reaction. General-purpose photopolymerization initiators such as benzyl ketal-based, acetophenone-based, and phosphine oxide-based photopolymerization initiators can be used. By arbitrarily selecting the light absorption wavelength of the polymerization initiator, it is possible to impart curability over a wide wavelength range from the ultraviolet region to the visible light region. Specifically, benzyl ketals include 2,2-dimethoxy-1,2-diphenylethan-1-one, α-hydroxyacetophenones include 1-hydroxy-cyclohexyl-phenyl-ketone and 1-[4-(2-hydroxyethoxy)-phenyl]-2-hydroxy-2-methyl-1-propan-1-one, α-aminoacetophenones include 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, and acylphosphine oxides include 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide and bis(2,4,6-trimethylbenzoyl)-phenylphosphine oxide, and these can be used alone or in combination of two or more.

[0032] Among the photopolymerization initiators, those containing α-hydroxyacetophenones, which are less prone to yellowing, are preferred. Commercially available products include Omnirad 127, Omnirad 184, and Omnirad 2959 (trade names: manufactured by IGM Resins). Among these, Omnirad 127D (2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methyl-propan-1-one), which has high reactivity, is particularly preferred. While most conventional photocleavage polymerization initiators have only one cleavage site per molecule, Omnirad 127D has two cleavage sites. Therefore, after cleavage by active energy ray irradiation, it can react with polymerizable monomers at multiple sites, resulting in excellent reactive curing properties, especially in thin films, and enabling the molecular weight of the polymerization reaction product to be increased.

[0033] The amount of the photopolymerization initiator to be added is preferably 5 to 25 parts by weight, more preferably 10 to 20 parts by weight, and particularly preferably 12 to 18 parts by weight, per 100 parts by weight of the radically polymerizable component of the low refractive index resin composition.

[0034] To the low refractive index resin composition of the present invention, an ultraviolet absorber, an antioxidant, an adhesion promoter, a bluing agent, an antifoaming agent, a thickener, an anti-precipitation agent, an antistatic agent, an anti-fogging agent, an antibacterial agent, an antiviral agent, organic fine particles, and the like may be added as needed within a range that does not impair performance.

[0035] The antireflection film of the present invention can be obtained by laminating a low refractive index layer obtained by curing the above-mentioned low refractive index resin composition on an HC layer that is laminated on a light-transmitting substrate film. The HC resin composition for forming the HC layer may contain a compound having a polymerizable functional group and a photopolymerization initiator. In addition, to improve the appearance, optical properties, and various physical properties of the cured film, it may contain additives such as a leveling agent, fillers such as silica fine particles, etc.

[0036] Examples of the compound having the polymerizable functional group include oligomers such as urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, polycarbonate (meth)acrylate, acrylic (meth)acrylate, and diene (meth)acrylate, which can be used alone or in combination of two or more. Among these, urethane (meth)acrylate (hereinafter referred to as urea) is preferred because it has excellent scratch resistance due to the cohesive force of hydrogen bonds derived from urethane bonds.

[0037] A low-molecular-weight binder may be used as a component other than the oligomer. Examples include (meth)acrylates and acrylamide compounds having an aliphatic, alicyclic, polyether skeleton, or functional groups such as hydroxyl groups and amino groups, and these can be used alone or in combination of two or more. Examples include pentaerythritol triacrylate, pentaerythritol tetraacrylate, dipentaerythritol tetraacrylate, dipentaerythritol pentaacrylate, and dipentaerythritol hexaacrylate (hereinafter referred to as DPHA).

[0038] When applying the low refractive index resin composition, it may be diluted with a solvent to improve coating properties. Examples of dilution solvents include alcohol-based solvents such as ethanol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol (hereinafter referred to as isobutanol), and diacetone alcohol; ketone-based solvents such as acetone, methyl ethyl ketone (hereinafter referred to as MEK), methyl isobutyl ketone, and cyclohexanone; ester-based solvents such as ethyl acetate and butyl acetate; and ether-based solvents such as PGM, diethyl ether, and diisopropyl ether. These solvents can be used alone or in combination of two or more. The solid content when diluted is, for example, 1 to 40%, but is not particularly limited and can be appropriately set to obtain a viscosity that is easy to apply.

[0039] Examples of the optically transparent substrate film onto which the HC resin composition is applied include polyester film, triacetyl cellulose film, polycarbonate film, polysulfone film, nylon film, cycloolefin film, acrylic film, polyimide film, ABS film, polyolefin film, PVC film, PVA film, etc. Among these, biaxially stretched polyester film is preferably used from the viewpoints of weather resistance, processability, dimensional stability, etc. The thickness of the film may be approximately 25 μm to 500 μm.

[0040] In order to improve adhesion to the HC resin composition, the substrate film may be subjected to a surface treatment such as a primer treatment, a sandblasting method, a solvent treatment, or the like to make the surface rough, or a surface oxidation treatment such as a corona discharge treatment, a chromic acid treatment, or an ozone / ultraviolet irradiation treatment.

[0041] The method for applying the HC resin composition and the low refractive index resin composition is not particularly limited, and they can be formed by known coating methods such as spray coating, roll coating, die coating, air knife coating, blade coating, spin coating, reverse coating, gravure coating, and wire bar coating, or by printing methods such as gravure printing, screen printing, offset printing, and inkjet printing.

[0042] The thickness of the HC resin composition when dry can be, for example, 1 μm to 10 μm, but is not limited to this. The thickness of the low refractive index layer applied on the HC layer when dry is preferably 50 to 200 nm, more preferably 80 to 150 nm. If the thickness of the low refractive index layer is within this range, it is possible to sufficiently reduce the reflectance of the film.

[0043] The light source for UV irradiation used to cure the HC resin composition and the low refractive index resin composition includes a low-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a carbon arc lamp, a xenon lamp, a metal halide lamp, an LED lamp, and an electrodeless UV lamp. The irradiation atmosphere may be air or an inert gas such as nitrogen or argon. Furthermore, the curing property can be further improved by heating the coating film during UV irradiation using a back roll or an IR heater. The irradiation condition is an irradiation intensity of 500 mW / cm. 2 ~3000mW / cm 2 , exposure dose 50-400mJ / cm 2 are exemplified, but are not limited to these.

[0044] The present invention will be described in detail below with reference to examples and comparative examples, but these are intended to be specific examples and are not intended to limit the scope of the invention. Unless otherwise specified, measurements were carried out at room temperature of 25°C and a relative humidity of 65%. The blend amounts are expressed in parts by weight in terms of solid content. [Example]

[0045] HC resin composition Z-876-21L (product name: Aica Kogyo Co., Ltd., hard coating agent containing hexafunctional urea, photopolymerization initiator, and colloidal nanosilica, solid content 40%)

[0046] Low flexure resin composition The binder resin was KAYARAD DPHA (trade name: Nippon Kayaku Co., Ltd., a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate), (A) was EBECRYL80 (trade name: Daicel Allnex Co., Ltd., amine-modified polyether acrylate, solid content 100%, tetrafunctional tertiary amino group compound), and (B) was Surulia 4320 (trade name: JGC Catalysts and Chemicals Co., Ltd., solid content 20.5%, mono- (c1) was ALMIBK30WT%-M47 (product name: CIK Nanotech, solid content 30%, average particle size 20nm, diluted with MIBK), (c2) was ALMIBK30WT%-M146 (product name: CIK Nanotech, solid content 30%, average particle size 80nm, diluted with MIBK), and (d1) was BYK-UV3590 (product name: BYK As shown in Tables 1 to 3, (d1) was a fluorine-containing compound, and (d2) was a fluorine-containing compound. The compound was used in the formulations shown in Tables 1 to 3. Each formulation was diluted with 68 parts of a mixed solvent of isobutanol and MEK (isobutanol:MEK=35:65). The diluted solution was stirred until uniformly dissolved and dispersed, yielding a low refractive index resin composition (solid content: approximately 3%).

[0047] Table 1 JPEG2026027595000001.jpg120170

[0048] Table 2 JPEG2026027595000002.jpg125153

[0049] Table 3 JPEG2026027595000003.jpg81130

[0050] The evaluation method was as follows.

[0051] Preparation of HC layer HC resin composition Z-876-21L was applied to a PET film 100U403 (product name: manufactured by Toray Industries, Inc., thickness 100 μm, with easy-adhesion layer) to a dry film thickness of 3 μm, and dried at 80°C for 1 minute. Then, the coating was irradiated with a high-pressure mercury lamp at 1300 mW / cm 2 , cumulative light intensity 200mJ / cm 2 The mixture was cured under the conditions described above to prepare an HC film.

[0052] Preparation of anti-reflective films A low refractive index resin composition was applied to the HC layer prepared above so that the dry film thickness was 100 nm, and after drying at 80°C for 1 minute, it was exposed to a high-pressure mercury lamp at 1300 mW / cm 2 , cumulative light intensity 200mJ / cm 2 The adhesive was cured under a nitrogen atmosphere to form a low-flexibility layer.

[0053] Total light transmittance: Measured in accordance with JIS K7361-1 using a haze meter Haze-GARD2 manufactured by Toyo Seiki Seisakusho Co., Ltd. Evaluation was made as follows: 92% or more was rated as ○, and less than 92% was rated as ×.

[0054] Haze: Measured in accordance with JIS K7136 using Haze-GARD2 manufactured by Toyo Seiki Seisakusho Co., Ltd., with 1.5% or less being rated as good and over 1.5% being rated as bad.

[0055] Minimum reflectance: Using the above anti-reflection film, the side opposite the coated side was scratched with sandpaper, the scratched area was filled in with a black pigment marker, and a black PET film was then attached to set the reflectance of the opposite side to 0%.Then, the reflectance of the HC side was measured using a spectrophotometer by plotting the reflectance in 1 nm increments in the range of 300 nm to 780 nm, and the minimum reflectance was measured. A reflectance of 1.5% or less was marked as ◯, and a reflectance of more than 1.5% was marked as ×.

[0056] Water contact angle: In accordance with the sessile drop method of JIS R 3257:1999, water was dropped onto the optical laminate at room temperature using a DMs-400 manufactured by Kyowa Interface Science Co., Ltd., and the contact angle was measured after leaving it to stand for 30 seconds. For the normal state, a value of 108° or more was rated as ○, and a value of less than 108° was rated as ×.

[0057] Scratch resistance: A load of 1000 g / cm 2 was placed on steel wool #0000 and moved back and forth 2000 times. When visually observed, if no scratches were found, it was marked as ◯, and if scratches were found, it was marked as ×.

[0058] Evaluation results Table 4 JPEG2026027595000004.jpg97135

[0059] Evaluation results Table 5 JPEG2026027595000005.jpg141166

[0060] Evaluation results table JPEG2026027595000006.jpg84135

[0061] The examples were satisfactory in all respects, including total light transmittance, haze, minimum reflectance, water contact angle, and scratch resistance.

[0062] On the other hand, Comparative Example 1, which did not contain (A), had poor scratch resistance, Comparative Example 2, which did not contain (B), had high minimum reflectance and water contact angle, Comparative Example 3, which did not contain (C), and Comparative Example 5, which did not contain (D), had high water contact angles and poor scratch resistance, and Comparative Example 4, which did not contain (d1), had a high water contact angle, and none of these were suitable for the present invention.

Claims

1. a hard coat layer and a low refractive index layer laminated in this order on a light-transmitting substrate film; The low refractive index layer is a cured layer of a low refractive index resin composition containing, as essential components, an amine-modified (meth)acrylate (A), hollow silica fine particles (B), nanoalumina particles (C), and a silicone-based leveling agent (D), and the (D) contains a polyether-modified polysiloxane (d1) in a content of 13 to 23 wt % relative to the total amount of the low refractive index layer.

2. 2. The antireflection film according to claim 1, wherein the content of the amine-modified (meth)acrylate (A) is 0.5 to 8.0% by weight based on the total amount of the low refractive index layer.

3. 3. The anti-reflection film according to claim 1, wherein the nano-alumina particles (C) include two types of particles having an average particle size of 10 to 40 nm (c1) and 50 to 100 nm (c2).

4. A low refractive index resin composition for an anti-reflection film, comprising as essential components an amine-modified (meth)acrylate (A), hollow silica fine particles (B), nanoalumina particles (C), and a silicone-based leveling agent (D), wherein (D) contains a polyether-modified polysiloxane (d1), and the blending amount of (D) is 13 to 23 wt % based on the total amount of solids.

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