WO2015145618A1 - Film de revêtement dur antireflet - Google Patents

Film de revêtement dur antireflet Download PDF

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Publication number
WO2015145618A1
WO2015145618A1 PCT/JP2014/058552 JP2014058552W WO2015145618A1 WO 2015145618 A1 WO2015145618 A1 WO 2015145618A1 JP 2014058552 W JP2014058552 W JP 2014058552W WO 2015145618 A1 WO2015145618 A1 WO 2015145618A1
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Prior art keywords
hard coat
component
fine particles
antiglare hard
coat layer
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PCT/JP2014/058552
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English (en)
Japanese (ja)
Inventor
達己 倉本
弘気 星野
知生 大類
所司　悟
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リンテック株式会社
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Application filed by リンテック株式会社 filed Critical リンテック株式会社
Priority to KR1020167016985A priority Critical patent/KR102116291B1/ko
Priority to JP2016509711A priority patent/JP6603652B2/ja
Priority to CN201480071029.7A priority patent/CN105874357B/zh
Priority to PCT/JP2014/058552 priority patent/WO2015145618A1/fr
Priority to TW104107911A priority patent/TWI648154B/zh
Publication of WO2015145618A1 publication Critical patent/WO2015145618A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/10—Esters
    • C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F222/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
    • C08F222/10—Esters
    • C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
    • C08F222/106—Esters of polycondensation macromers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
    • G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
    • G02B5/0242—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of dispersed particles

Definitions

  • the present invention relates to an antiglare hard coat film.
  • the present invention relates to an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display.
  • incident light from the outside (hereinafter sometimes referred to as “external light”) is reflected on the screen.
  • incident light hereinafter sometimes referred to as “external light”.
  • a technique using a member having an antiglare hard coat layer has been implemented.
  • a method of forming such an antiglare hard coat layer (1) a method of roughening the surface of the hard coat layer by a physical method when forming the hard coat layer, (2) for forming the hard coat layer
  • the method is roughly divided into three types: a method of mixing a filler into a hard coating agent, and a method of (3) mixing two components that are incompatible with the hard coating agent for forming a hard coating layer and utilizing their phase separation. Can do.
  • fine irregularities are formed on the surface of the hard coat layer to suppress regular reflection of external light and prevent reflection of external light such as a fluorescent lamp.
  • the mainstream method is to mix a filler into the hard coat layer (see, for example, Patent Documents 1 and 2).
  • Patent Document 1 (A) (a) a polyfunctional (meth) acrylate monomer and / or (meth) acrylate prepolymer and (b) reactive silica fine particles are formed on the surface of a transparent plastic film.
  • a hard coat layer formed using a hard coat layer-forming material containing an active energy ray-sensitive composition, (B) spherical organic fine particles, and (C) a dispersant having at least one polar group in the molecule.
  • an antiglare hard coat film characterized in that the hard coat layer has a thickness larger than the average particle size of (B) spherical organic fine particles.
  • the average particle diameter of the spherical organic fine particles is preferably set to a value in the range of 6 to 10 ⁇ m.
  • Patent Document 2 discloses a hard coat layer formed on the surface of a transparent plastic film using a hard coat layer forming material containing (A) an active energy ray-sensitive composition and (B) spherical organic fine particles.
  • Anti-glare hard coat wherein the total haze value of the hard coat layer is 20% or less, and the value of “total haze value ⁇ internal haze value” is in the range of ⁇ 10 to + 1%.
  • a film is disclosed.
  • the average particle diameter of the spherical organic fine particles is preferably set to a value in the range of 1 to 10 ⁇ m.
  • the anti-glare hard coat film disclosed in Patent Document 1 can obtain a predetermined anti-glare property, the average particle diameter of the spherical organic fine particles is large, resulting in a glare feeling on the screen ( Hereinafter, there is a problem that it may be referred to as “glare”.
  • glare when applied to a high-definition display with a high resolution, it has become difficult to suppress the occurrence of glare, and there has been a problem that comfort when viewing the screen is reduced.
  • the antiglare hard coat film disclosed in Patent Document 2 is not sufficiently considered in the numerical range of the average particle diameter of the spherical organic fine particles, but also contains a dispersant in the hard coat layer forming material. As a result, there was a problem that it was difficult to sufficiently control the sedimentation of the spherical organic fine particles. As a result, not only is it difficult to stably obtain the predetermined antiglare property, but even if the predetermined antiglare property can be obtained, the spherical organic fine particles are excessively removed from the surface of the hard coat layer. In other words, there was a problem that the film could easily fall off and sufficient scratch resistance could not be obtained, and the antiglare property was likely to be lowered.
  • an object of the present invention is to provide an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display. There is.
  • an anti-glare hard coat film having an anti-glare hard coat layer on the surface of a plastic substrate, wherein the anti-glare hard coat layer is active energy ray curable as the component (A).
  • Cured product of antiglare hard coat layer forming composition comprising resin, resin fine particles as component (B), dispersant as component (C), and photopolymerization initiator as component (D)
  • the volume average particle diameter of the resin fine particles as the component (B) is set to a value within the range of 1 to 2.5 ⁇ m, and the blending amount of the resin fine particles as the component (B) is determined as the activity as the component (A).
  • the dispersant as the component (C) has at least one polar group in the molecule, As a polar group, a carboxyl group, Compound having at least one selected from the group consisting of droxyl group, sulfo group, primary amino group, secondary amino group, tertiary amino group, amide group, quaternary ammonium base, pyridium base, sulfonium base and phosphonium base
  • the blending amount of the dispersant as the component (C) is 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
  • An anti-glare hard coat film characterized by having a value within the range is provided, and the above-described problems can be solved. That is, if it is an anti-glare hard coat film of the present invention, resin fine particles having a relatively small volume average particle diameter relative to the anti-glare hard coat layer forming composition for forming the anti-glare hard coat layer Therefore, even if it is applied to a high-definition display, the occurrence of glare can be effectively suppressed. In addition, since a predetermined dispersant is blended at a predetermined ratio, the sedimentation state of the resin fine particles in the coating film of the composition for forming an antiglare hard coat layer applied to the surface of the plastic substrate is effectively controlled.
  • the anti-glare hard coat layer surface is stably formed with fine irregularities, and the resin particles have excellent anti-glare properties despite the volume average particle diameter being limited to a relatively small range. Can do. Therefore, the antiglare hard coat film of the present invention has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display.
  • the resin fine particles as the component (B) are acrylic polymer resin fine particles, acrylic-styrene copolymer resin fine particles, styrene polymer resin fine particles, and silicone resin fine particles. It is preferably at least one selected from the group consisting of By comprising in this way, a fine unevenness
  • the composition for forming an antiglare hard coat layer contains silica fine particles as the component (E), and the volume of the silica fine particles as the component (E).
  • the average particle diameter is set to a value in the range of 2 to 500 nm, and the blending amount of the silica fine particles as the component (E) is 10 to A value within the range of 200 parts by weight is preferred.
  • the composition for forming an antiglare hard coat layer contains a slip agent as the component (F), and contains a slip agent as the component (F).
  • the amount is preferably set to a value in the range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
  • the slip agent as the component (F) is preferably silicone oil and modified silicone oil or one of them.
  • the film thickness of the antiglare hard coat layer is preferably set to a value in the range of 0.5 to 6 ⁇ m.
  • FIGS. 1 (a) to 1 (b) are diagrams for explaining the antiglare hard coat film of the present invention.
  • FIG. 2 is a diagram provided for explaining the relationship between the volume average particle diameter of resin fine particles and the glare and antiglare property of the antiglare hard coat film.
  • FIGS. 3A to 3E are diagrams for explaining a method for evaluating glare in an antiglare hard coat film.
  • FIGS. 4A and 4B are diagrams for explaining a particle size distribution chart of resin fine particles in Examples 1 and 2.
  • FIG. FIG. 5 is a diagram for explaining a particle size distribution chart of resin fine particles in Comparative Example 1.
  • An embodiment of the present invention is an antiglare hard coat film 14 having an antiglare hard coat layer 13 on the surface of a plastic substrate 12, as shown in FIG.
  • Layer 13 is an active energy ray-curable resin as component (A), resin fine particles as component (B), a dispersant as component (C), a photopolymerization initiator as component (D),
  • the volume average particle diameter of the resin fine particles as the component (B) is in the range of 1 to 2.5 ⁇ m
  • the amount of the resin fine particles is a value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A), and the dispersion as the component (C)
  • the agent has at least one polar group in the molecule
  • the polar group consists of carboxyl group, hydroxyl group, sulfo group, primary amino group, secondary amino group, tertiary amino group, amide group, quaternary ammonium base, pyr
  • a compound having at least one selected from the group, and the blending amount of the dispersant as the component (C) is 0 to 2 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A)
  • the antiglare hard coat film 14 has a value within the range (excluding 0 parts by weight).
  • Anti-glare hard coat layer (1) Anti-glare hard coat layer forming composition
  • the anti-glare hard coat layer in the anti-glare hard coat film of the present invention comprises an active energy ray-curable resin as component (A) and And a cured product of an antiglare hard coat layer forming composition comprising resin fine particles as component (B), a dispersant as component (C), and a photopolymerization initiator as component (D).
  • component (A) active energy ray-curable resin
  • B resin fine particles
  • C dispersant
  • D photopolymerization initiator
  • active energy ray-curable resin As the type of active energy ray-curable resin as the component (A) contained in the composition for forming an antiglare hard coat layer in the present invention, It is not limited, and can be selected from conventionally known ones, and examples include energy ray-curable monomers, oligomers, resins, and mixtures thereof. More specifically, it is preferable to use a polyfunctional (meth) acrylic monomer or a (meth) acrylate prepolymer.
  • polyfunctional (meth) acrylic monomer examples include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, and polyethylene.
  • Examples of the (meth) acrylate prepolymer include polyester acrylate, epoxy acrylate, urethane acrylate, and polyol acrylate.
  • the polyester acrylate-based prepolymer for example, by esterifying hydroxyl groups of a polyester oligomer having hydroxyl groups at both ends obtained by condensation of a polyvalent carboxylic acid and a polyhydric alcohol with (meth) acrylic acid, or It can be obtained by esterifying a hydroxyl group at the terminal of an oligomer obtained by adding an alkylene oxide to a polyvalent carboxylic acid with (meth) acrylic acid.
  • the epoxy acrylate prepolymer can be obtained, for example, by reacting (meth) acrylic acid with an oxirane ring of a relatively low molecular weight bisphenol-type epoxy resin or novolak-type epoxy resin and esterifying it.
  • the urethane acrylate prepolymer can be obtained, for example, by esterifying, with (meth) acrylic acid, a polyurethane oligomer obtained by a reaction between polyether polyol or polyester polyol and polyisocyanate.
  • the polyol acrylate-based prepolymer can be obtained by esterifying the hydroxyl group of the polyether polyol with (meth) acrylic acid.
  • These prepolymers may be used individually by 1 type, may be used in combination of 2 or more type, and may be used together with the polyfunctional (meth) acrylate type monomer mentioned above.
  • Resin Fine Particle i) Type As the type of resin fine particle as component (B) contained in the composition for forming an antiglare hard coat layer in the present invention, for example, silicone resin fine particles , Modified silicone resin fine particles, melamine resin fine particles, acrylic polymer resin fine particles (for example, polymethyl methacrylate resin fine particles, etc.), acrylic-styrene copolymer resin fine particles, polycarbonate resin fine particles, polyethylene resin fine particles, styrene polymer Examples thereof include resin fine particles and benzoguanamine resin fine particles.
  • At least one selected from the group consisting of acrylic polymer resin fine particles, acrylic-styrene copolymer resin fine particles, styrene polymer resin fine particles, and silicone resin fine particles is preferable. This is because these resin fine particles can stably form fine irregularities on the surface of the antiglare hard coat layer. From the viewpoint of homogenizing the light scattering state and stabilizing the antiglare property, it is preferable that the resin fine particles have a spherical shape.
  • the volume average particle diameter of the resin fine particles is set to a value within the range of 1 to 2.5 ⁇ m. This is because the occurrence of glare can be effectively suppressed while maintaining excellent anti-glare properties by setting the volume average particle diameter of the resin fine particles to a value within this range. That is, when the volume average particle diameter of the resin fine particles is less than 1 ⁇ m, it may be difficult to maintain sufficient antiglare properties. On the other hand, when the volume average particle diameter of the resin fine particles exceeds 2.5 ⁇ m, it may be difficult to effectively suppress the occurrence of glare particularly when applied to a high-definition display. .
  • the volume average particle diameter of the resin fine particles is more preferably set to a value within the range of 1.2 to 2.3 ⁇ m, and further preferably set to a value within the range of 1.3 to 2 ⁇ m.
  • the volume average particle diameter of the resin fine particles can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
  • the horizontal axis represents the volume average particle diameter ( ⁇ m) of the resin fine particles
  • the left vertical axis represents the glare (ppi) in the antiglare hard coat film
  • the right vertical axis represents The characteristic curve B which took 60 degree specular glossiness (%) in an anti-glare hard coat film is shown.
  • specific methods for measuring glare (ppi) and 60 ° specular gloss (%) in an antiglare hard coat film are described in Examples.
  • the glare value tends to decrease as the volume average particle diameter of the resin fine particles increases.
  • the glare value in the characteristic curve A should be set to a value exceeding 80 ppi in order to stably suppress the occurrence of glare.
  • the volume average particle diameter of the resin fine particles should be 2.5 ⁇ m or less in order to set the glare value to a value exceeding 80 ppi and effectively suppress the glare.
  • the 60 ° specular gloss also tends to decrease as the volume average particle diameter of the resin fine particles increases.
  • the volume average particle diameter of the resin fine particles should be a value of 1 ⁇ m or more in order to set the 60 ° specular gloss to a value of 120% or less and stably obtain a predetermined antiglare property.
  • the volume average particle diameter of the resin fine particles is set to 1-2. It is understood that the value should be in the range of 5 ⁇ m.
  • the Cv value of the resin fine particles is preferably set to a value of 50% or less.
  • the reason for this is that when the Cv value exceeds 50%, the abundance of particles having a particle size larger or smaller than the volume average particle size increases, and if the abundance of a large particle size increases, glare occurs. This is because it may be difficult to suppress the occurrence of the occurrence of an antiglare, and it may be difficult to obtain a desired antiglare property when the amount of small particle size increases. Therefore, the Cv value of the resin fine particles is more preferably 40% or less, and further preferably 30% or less.
  • Cv value means the variation coefficient of the particle size distribution represented by following formula (1).
  • Cv value (%) (standard deviation particle diameter / volume average particle diameter) ⁇ 100 (1)
  • the Cv value can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
  • Blending amount of the resin fine particles is set to a value within the range of 0.1 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). And This is because fine irregularities are formed on the surface of the antiglare hard coat layer to obtain excellent antiglare properties. That is, when the amount of the resin fine particles is less than 0.1 parts by weight, fine irregularities cannot be sufficiently formed on the surface of the antiglare hard coat layer, and a desired antiglare property can be obtained. This is because it may be difficult. On the other hand, when the amount of the resin fine particles exceeds 20 parts by weight, the haze value becomes excessively large, and the visibility of the display image on the display may be lowered.
  • the amount of the resin fine particles is more preferably set to a value within the range of 1 to 15 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). It is more preferable to set the value within the range.
  • composition for forming an antiglare hard coat layer in the present invention is characterized by containing a dispersant as the component (C).
  • a dispersant as the component (C).
  • the reason for this is that when the composition for forming an antiglare hard coat layer is applied to the surface of a plastic substrate, the amount of resin fine particles as the component (B) in the coating film is effectively settled by including a dispersant.
  • the anti-glare hard coat layer surface is stably controlled to form fine irregularities, and the anti-glare property is excellent even though the volume average particle diameter of the resin fine particles is limited to a relatively small range. It is because it can be obtained. That is, resin fine particles are unevenly distributed in a suitable range on the surface side of the antiglare hard coat layer, and fine irregularities on the surface of the antiglare hard coat layer can be stably formed. Obtainable.
  • the dispersant as the component (C) contained in the composition for forming an antiglare hard coat layer in the present invention has at least one polar group in the molecule, and includes a carboxyl group, a hydroxyl group as the polar group. It is a compound having a group, a sulfo group, a primary amino group, a secondary amino group, a tertiary amino group, an amide group, a quaternary ammonium base, a pyridium base, a sulfonium base and a phosphonium base.
  • polar groups described above a carboxyl group, a sulfo group, and a primary to tertiary amino group are particularly preferable. This is because these polar groups can more effectively coordinate the dispersant to the surface of the resin fine particles.
  • one or more of the polar groups described above may be introduced into the molecule.
  • a basic skeleton for bonding organic compounds having each polar group is required. As such a basic skeleton, an ester chain, a vinyl chain, an acrylic chain, Those composed of an ether chain and a urethane chain are preferred.
  • a part of hydrogen atoms in these molecules may be substituted with a halogen atom.
  • acrylic resins, urethane resins, polyester resins and alkyd resins are preferred, and acrylic resins, urethane resins and polyester resins are particularly preferred.
  • the polar group mentioned above may be arrange
  • numerator by a block structure or a graft structure is preferable. This is because the adsorption performance to the resin fine particles is enhanced by the polar group being arranged at the terminal portion.
  • the molecular weight of the dispersant is not particularly limited, but can be selected from a wide range of from 100 to 900,000.
  • a dispersing agent may be used individually by 1 type, and may be used in combination of 2 or more type.
  • the blending amount of the dispersant is in the range of 0 to 2 parts by weight (excluding 0 parts by weight) with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). It is characterized by being a value within. This is because the resin fine particles can be unevenly distributed in a suitable range on the surface of the antiglare hard coat layer. That is, when the blending amount of the dispersant is 0 part by weight, the resin fine particles cannot be unevenly distributed in a suitable range on the surface of the antiglare hard coat layer, and it becomes difficult to obtain a desired antiglare property. Because there is. On the other hand, if the blending amount of the dispersant exceeds 2 parts by weight, the scratch resistance may decrease.
  • the blending amount of the dispersant is more preferably set to a value within the range of 0.01 to 1 part by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of 0.5 parts by weight.
  • composition for forming an antiglare hard coat layer in the present invention preferably contains silica fine particles as the component (E). This is because when the composition for forming an antiglare hard coat layer is applied to the surface of a plastic substrate, the amount of resin fine particles as the component (B) in the coating film is more effectively controlled to prevent This is because fine irregularities can be more stably formed on the surface of the dazzling hard coat layer. That is, by utilizing the difference in specific gravity with the resin fine particles, the resin fine particles are unevenly distributed on the surface side of the antiglare hard coat layer in a more suitable range, and the fine irregularities on the surface of the antiglare hard coat layer are more stable. Thus, excellent antiglare properties can be obtained.
  • silica fine particles having a surface functional group examples include silica fine particles having a group containing a (meth) acryloyl group as the surface functional group (hereinafter sometimes referred to as reactive silica fine particles).
  • reactive silica fine particles can be obtained, for example, by reacting a silanol group on the surface of the silica fine particles with a polymerizable unsaturated group-containing organic substance having a functional group capable of reacting with the silanol group.
  • Examples of the polymerizable unsaturated group include a radical polymerizable (meth) acryloyl group.
  • Examples of the polymerizable unsaturated group-containing organic compound having a functional group capable of reacting with a silanol group include acrylic acid, acrylic acid chloride, 2-isocyanatoethyl acrylate, glycidyl acrylate, and 2,3-acrylic acid. Iminopropyl, 2-hydroxyethyl acrylate, acryloyloxypropyltrimethoxysilane, and the like, and methacrylic acid derivatives corresponding to these acrylic acid derivatives can be preferably used. In addition, these acrylic acid derivatives and methacrylic acid derivatives may be used individually by 1 type, and may be used in combination of 2 or more type.
  • volume average particle size of the silica fine particles is preferably set to a value in the range of 2 to 500 nm. This is because when the volume average particle diameter of the silica fine particles is less than 2 nm, the dispersion stability of the silica fine particles may decrease. On the other hand, when the volume average particle diameter of the silica fine particles exceeds 500 nm, the haze value may excessively increase due to the silica fine particles. Accordingly, the volume average particle diameter of the silica fine particles is more preferably set to a value within the range of 4 to 300 nm, and further preferably set to a value within the range of 6 to 50 nm. The volume average particle diameter of the silica fine particles can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
  • the blending amount of the silica fine particles is preferably set to a value within the range of 10 to 200 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A).
  • the reason for this is that if the amount of silica fine particles is less than 10 parts by weight, it may be difficult to make the resin fine particles unevenly distributed on the surface of the antiglare hard coat layer.
  • the blending amount of the silica fine particles exceeds 200 parts by weight, the scratch resistance may be lowered due to a decrease in the blending ratio of the active energy ray-curable resin.
  • the blending amount of the silica fine particles is more preferably 12 to 175 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A), preferably 15 to 150 parts by weight. It is more preferable to set the value within the range.
  • the blending amount of the photopolymerization initiator should be a value within the range of 0.2 to 10 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). Is preferred. This is because it may be difficult to obtain sufficient curability when the blending amount of the photopolymerization initiator is less than 0.2 parts by weight. On the other hand, when the blending amount of the photopolymerization initiator exceeds 10 parts by weight, the scratch resistance may be lowered. Accordingly, the blending amount of the photopolymerization initiator is more preferably set to a value within the range of 0.5 to 7 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of 5 parts by weight.
  • the antiglare hard coat layer forming composition in the present invention preferably contains a slip agent as the component (F).
  • a slip agent as the component (F).
  • the scratch resistance of the antiglare hard coat film can be improved by including a slip agent. That is, in the present invention, since the volume average particle diameter of the resin fine particles as the component (B) is limited to a relatively small range, the resin fine particles unevenly distributed on the surface of the antiglare hard coat layer are caused by friction or the like. It may be easy to drop off.
  • the slip agent by improving the slip property of the antiglare hard coat layer surface by the slip agent, the predetermined fine scratch resistance can be obtained even though the volume average particle diameter of the resin fine particles is limited to a relatively small range. Obtainable.
  • slip agent is preferably silicone oil and modified silicone oil or one of them. This is because these slip agents are excellent in compatibility with other components in the antiglare hard coat layer forming composition, and further improve the scratch resistance in the antiglare hard coat film. Because it can. More specifically, silicone-modified urethane acrylate and a mixture of urethane acrylate, polydimethylsiloxane, modified polydimethylsiloxane and the like can be mentioned.
  • the blending amount of the slip agent is preferably set to a value in the range of 0.05 to 20 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). .
  • the blending amount of the slip agent is less than 0.05 parts by weight, sufficient slip properties cannot be obtained, and it may be difficult to obtain sufficient scratch resistance.
  • the blending amount of the slip agent exceeds 20 parts by weight, the scratch resistance may be lowered due to a decrease in the blending ratio of the active energy ray-curable resin. Therefore, the blending amount of the slip agent is more preferably 0.5 to 15 parts by weight with respect to 100 parts by weight of the active energy ray-curable resin as the component (A). More preferably, the value is within the range of parts by weight.
  • composition for forming antiglare hard coat layer used in the present invention may be used as an essential component described above in an appropriate solvent, if necessary. It can be prepared by adding the components A) to (D) and the optional components (E) to (F) and dissolving or dispersing them. At this time, in addition to the components (A) to (F), for example, an antioxidant, an ultraviolet absorber, a silane coupling agent, a light stabilizer, a leveling agent, an antifoaming agent and the like can be added.
  • the solvent used examples include aliphatic hydrocarbons such as hexane and heptane, aromatic hydrocarbons such as toluene and xylene, halogenated hydrocarbons such as methylene chloride and ethylene chloride, methanol, ethanol, propanol, and butanol. Alcohols, acetone, methyl ethyl ketone, ketones such as 2-pentanone, isophorone and cyclohexanone, esters such as ethyl acetate and butyl acetate, cellosolve solvents such as ethyl cellosolve and the like.
  • the concentration and viscosity of the antiglare hard coat layer forming composition thus prepared may be in a numerical range that can be coated on the surface of the plastic substrate, and should be appropriately selected according to the situation. Can do.
  • the film thickness of the antiglare hard coat layer is preferably set to a value in the range of 0.5 to 6 ⁇ m. This is because when the film thickness of the antiglare hard coat layer is less than 0.5 ⁇ m, it may be difficult to obtain the hardness required for actual use in pencil hardness. On the other hand, when the film thickness of the antiglare hard coat layer exceeds 6 ⁇ m, curling due to the curing shrinkage of the active energy ray curable resin and antiglare generated when the antiglare hard coat film is bent. This is because it may be difficult to suppress cracks in the conductive hard coat layer. Therefore, the film thickness of the antiglare hard coat layer is more preferably set to a value within the range of 1 to 6 ⁇ m, and further preferably set to a value within the range of 2 to 5 ⁇ m.
  • Plastic substrate As the type of plastic substrate in the present invention, it can be appropriately selected from known plastic substrates as a substrate for conventional optical hard coat films, such as polyethylene terephthalate, polybutylene terephthalate, Polyester film such as polyethylene naphthalate, polyethylene film, polypropylene film, cellophane, diacetyl cellulose, triacetyl cellulose, acetyl cellulose butyrate, polyvinyl chloride, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, polystyrene, polycarbonate , Polymethylpentene, polysulfone, polyether ether ketone, polyether sulfone, polyether imide, polyimide, fluororesin, poly Examples include imide, acrylic resin, norbornene resin, and cycloolefin resin.
  • the film thickness of the plastic substrate is preferably set to a value in the range of 15 to 300 ⁇ m, and more
  • the antiglare hard coat film of the present invention can be bonded to a polarizer to form a polarizing plate 20. That is, a film 12a having no optical anisotropy, such as a triacetylcellulose (TAC) film, is used as a plastic substrate, and an antiglare hard coat layer 13 is formed on one surface thereof, and an antiglare hard coat film 14 is formed. And Next, a TAC film 12a having an antiglare hard coat layer 13 formed on one surface of the polyvinyl alcohol polarizer 11 is laminated via an adhesive layer 15a, and an antiglare hard disk is formed on the opposite surface of the polyvinyl alcohol polarizer.
  • TAC triacetylcellulose
  • the TAC film 12b on which the coat layer 13 is not formed is laminated via the adhesive layer 15b.
  • the polarizing plate 20 which can suppress generation
  • the polarizing plate 20 may be provided with an adhesive layer 16 and a release sheet 17 for bonding to an optical component such as a liquid crystal cell.
  • Characteristics of antiglare hard coat film (1) 60 ° specular gloss
  • the 60 ° specular gloss of an antiglare hard coat film measured in accordance with JIS Z 8741 may be 130% or less. preferable. This is because it may be difficult to obtain excellent antiglare properties when the 60 ° specular glossiness exceeds 130%. Accordingly, the 60 ° specular gloss of the antiglare hard coat film measured in accordance with JIS Z 8741 is more preferably 120% or less, and even more preferably 115% or less.
  • ppi pixel / inch
  • the glare caused by the antiglare hard coat film is more likely to occur as the ppi in the lattice pattern increases, in other words, as the display becomes higher definition. Therefore, the larger the ppi value mentioned above, the more effectively the occurrence of glare can be suppressed.
  • the haze value of the antiglare hard coat film measured in accordance with JIS K 7136 is preferably set to a value in the range of 3 to 40%. The reason for this is that when the haze value is less than 3%, it may be difficult to obtain excellent antiglare properties. On the other hand, if the haze value exceeds 40%, the visibility of the display image on the display may be lowered. Accordingly, the haze value of the antiglare hard coat film measured in accordance with JIS K 7136 is more preferably set to a value in the range of 3.5 to 35%, and a value in the range of 4 to 30%. More preferably.
  • the total light transmittance of the anti-glare hard coat film measured based on JIS K 7361 is more preferably 88% or more, and even more preferably 90% or more.
  • an anti-glare hard coat film is a thing without an external appearance change in the abrasion-resistant evaluation using steel wool. This is because it may be difficult to obtain sufficient scratch resistance as a hard coat film when a change in appearance is observed in the evaluation of scratch resistance. Details of the evaluation of the scratch resistance will be described later.
  • a composition for forming an antiglare hard coat layer on the surface of a plastic substrate is a conventionally known method, For example, the coating is performed using a bar coating method, a knife coating method, a roll coating method, a blade coating method, a die coating method, a gravure coating method, or the like. Subsequently, after drying a coating film, an active energy ray is irradiated, a coating film is hardened, and an anti-glare hard coat film is obtained by making a coating film into an anti-glare hard coat layer.
  • the active energy ray for curing the coating film includes ultraviolet rays, and the ultraviolet rays can be irradiated by a high-pressure mercury lamp, an electrodeless lamp, a metal halide lamp, a xenon lamp, or the like.
  • the irradiation amount of ultraviolet rays is usually in the range of 100 to 500 mJ / cm 2 .
  • Example 1 Production of Antiglare Hard Coat Film (1) Preparation Step of Composition for Forming Antiglare Hard Coat Layer
  • active energy ray-curable resin as component (A), and (B) Resin fine particles as a component, a dispersant as a component (C), a photopolymerization initiator as a component (D), a silica fine particle as a component (E), and a slip agent as a component (F).
  • active energy ray-curable resin as component (A)
  • B) Resin fine particles as a component
  • a dispersant as a component (C)
  • a photopolymerization initiator as a component
  • D silica fine particle
  • E silica fine particle
  • a slip agent as a component
  • Cv value of the component (B) means a variation coefficient of the particle size distribution represented by the following formula (1).
  • Cv value (%) (standard deviation particle diameter / volume average particle diameter) ⁇ 100 (1)
  • the volume average particle size and Cv value of the component (B) were measured using a laser diffraction / scattering particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.). At this time, methyl ethyl ketone was used as a dispersion solvent.
  • the particle size distribution chart of (B) component used in Example 1 is shown to Fig.4 (a).
  • the obtained composition for forming an antiglare hard coat layer was easily made into a polyester film with an easy-adhesion layer as a plastic substrate (manufactured by Toray Industries, Inc., Lumirror U48, film thickness: 100 ⁇ m).
  • the wire layer # 14 was applied to the adhesive layer so that the film thickness after curing was 5 ⁇ m to form a coating layer.
  • the dried coating layer is irradiated with ultraviolet rays under the following conditions using an ultraviolet irradiation device (GS Yuasa Corporation, light source: high-pressure mercury lamp) to cure the coating layer.
  • an ultraviolet irradiation device GS Yuasa Corporation, light source: high-pressure mercury lamp
  • Evaluation 1 of antiglare property The antiglare property of the obtained antiglare hard coat film was evaluated. That is, the obtained antiglare hard coat film was placed on a black plate so that the antiglare hard coat layer was on top. Next, a three-wavelength fluorescent lamp was turned on above the antiglare hard coat film, reflected by the antiglare hard coat film, and evaluated according to the following criteria. The obtained results are shown in Table 2. ⁇ : The outline of the fluorescent lamp visually recognized by the reflection on the antiglare hard coat film is blurred. ⁇ : The outline of the fluorescent lamp visually recognized by the reflection on the antiglare hard coat film is not blurred.
  • Anti-glare evaluation 2 The antiglare property of the obtained antiglare hard coat film was evaluated based on the specular gloss (%). That is, using a gloss meter (Nippon Denshoku Industries Co., Ltd., VG2000), the 60 ° specular gloss (%) of the obtained antiglare hard coat film was measured according to JIS Z 8741. The obtained results are shown in Table 2.
  • a lattice pattern provided with a light transmission portion so as to be 60 ppi (pixels / inch) was prepared.
  • Such a lattice-shaped pattern was prepared by providing a metal vapor deposition layer on a glass plate, performing a resist treatment on the metal vapor deposition layer, etching, and then removing the resist.
  • the prepared grid pattern was placed on a backlight (Bright Box 5000, manufactured by King Corp.).
  • the obtained antiglare hard coat film was placed on the lattice pattern so that the antiglare hard coat layer was on top, and the occurrence of glare was confirmed.
  • the antiglare hard coat film is moved in a direction parallel to the lattice pattern, and when the occurrence of the glare previously confirmed moves together with the antiglare hard coat film, the glare It was judged that the occurrence of the phenomenon was caused by the antiglare hard coat film.
  • the antiglare hard coat was sequentially used by increasing the ppi in increments of 10 ppi. The same operation was repeated until the occurrence of glare caused by the film was confirmed.
  • Table 2 shows the largest lattice pattern (ppi) in which the occurrence of glare due to the antiglare hard coat film is not confirmed. The glare caused by the antiglare hard coat film is more likely to occur as the ppi in the lattice pattern increases, in other words, as the display becomes higher definition.
  • FIG. 3B shows a photograph of an 80 ppi lattice pattern
  • FIG. 3C shows a photograph of a 100 ppi lattice pattern
  • FIG. 3D shows a photograph of a 140 ppi lattice pattern
  • FIG. 3E shows photographs of a 180 ppi lattice pattern.
  • the haze value (%) in the obtained antiglare hard coat film was evaluated. That is, the haze value (%) of the obtained antiglare hard coat film was measured based on JIS K 7136 using a haze meter (NDH5000, manufactured by Nippon Denshoku Industries Co., Ltd.). The obtained results are shown in Table 2.
  • the scratch resistance of the obtained antiglare hard coat film was evaluated. That is, using a # 0000 steel wool, the anti-glare hard coat layer of the obtained anti-glare hard coat film was subjected to a 10 reciprocating rub test at a load of 250 g / cm 2 and a sliding distance of 10 cm. . Next, the presence or absence of scratches on the antiglare hard coat layer was visually confirmed under a three-wavelength fluorescent lamp, and evaluated according to the following criteria. The obtained results are shown in Table 2. ⁇ : No change is confirmed in the appearance of the antiglare hard coat layer ⁇ : A change is confirmed in the appearance of the antiglare hard coat layer
  • Example 2 the antiglare hard coat film was the same as in Example 1 except that the components (A) to (B) and (E) in the antiglare hard coat layer forming composition were changed as follows. Were manufactured and evaluated. The obtained results are shown in Table 2. Moreover, the particle size distribution chart of (B) component used in Example 2 is shown in FIG.4 (b).
  • (A1) Component: Urethane Acrylate Prepolymer: 70 parts by weight
  • (A2) Component: Multifunctional acrylate: 30 parts by weight
  • (B) Component: Crosslinked acrylic-styrene copolymer resin fine particles: 5 parts by weight (Sekisui Plastics Industry ( Co., Ltd., Techpolymer XX16LA, volume average particle size: 2.5 ⁇ m, Cv value: 28%)
  • Example 3 an antiglare hard coat film was produced in the same manner as in Example 1, except that the components (A) to (E) in the antiglare hard coat layer forming composition were changed as follows: evaluated. The obtained results are shown in Table 2.
  • component Silicone resin fine particles: 5 parts by weight (Momentive Co., Ltd., Tospearl 120, volume average particle size: 2 ⁇ m, Cv value: 20%)
  • Example 4 an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (F) was not blended in the antiglare hard coat layer forming composition. The obtained results are shown in Table 2.
  • Comparative Example 1 an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (B) in the antiglare hard coat layer forming composition was changed as follows. The obtained results are shown in Table 2. Further, a particle size distribution chart of the component (B) used in Comparative Example 1 is shown in FIG. (B) Component: Crosslinked acrylic polymer resin fine particles: 10 parts by weight (manufactured by Soken Chemical Co., Ltd., MX-80H3 wt, volume average particle size: 0.8 ⁇ m, Cv value: 10%)
  • Comparative Example 2 In Comparative Example 2, an antiglare hard coat film was produced and evaluated in the same manner as in Example 1 except that the component (B) in the antiglare hard coat layer forming composition was changed as follows. The obtained results are shown in Table 2.
  • resin fine particles having a predetermined volume average particle diameter are predetermined for an antiglare hard coat layer forming composition for forming an antiglare hard coat layer.
  • a predetermined dispersant at a predetermined ratio, it has become possible to effectively suppress the occurrence of glare while maintaining excellent antiglare properties.
  • an antiglare hard coat film that has excellent antiglare properties and can effectively suppress the occurrence of glare even when applied to a high-definition display is obtained. I was able to do it. Therefore, the antiglare hard coat film of the present invention is expected to contribute significantly to the improvement of visibility in a high-definition display.
  • 12 Plastic substrate, 12a, b: TAC film, 13: Antiglare hard coat layer, 14: Antiglare hard coat film, 15a, b: Adhesive layer, 16: Adhesive layer, 17: Release sheet, 20: Polarizing plate

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Abstract

La présente invention concerne un film de revêtement dur antireflet qui possède d'excellentes propriétés antireflet et est capable de supprimer efficacement l'apparition de reflet éblouissant même dans les cas où le film de revêtement dur antireflet est appliqué sur un affichage à haute définition. L'invention concerne un film de revêtement dur antireflet qui comprend une couche de revêtement dur antireflet sur la surface d'une base plastique. La couche de revêtement dur antireflet est formée d'un produit durci d'une composition pour former une couche de revêtement dur antireflet, ladite composition contenant une résine durcissable par rayonnement d'énergie actif (composant (A)), des particules fines de résine (composant B)), un dispersant (composant (C)) et un initiateur de photopolymérisation (composant (D)). Le diamètre de particule moyen en volume des particules fines de résine (composant (B)) est ajusté de manière à être dans la plage de 1 à 2,5 μm. La quantité de mélange des particules fines de résine (composant (B)) est ajustée de manière à être dans une plage spécifique. Le dispersant (composant (C)) est un composé ayant un groupe polaire spécifique. La quantité de mélange du dispersant (composant (C)) est ajustée de manière à être dans une plage spécifique.
PCT/JP2014/058552 2014-03-26 2014-03-26 Film de revêtement dur antireflet WO2015145618A1 (fr)

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PCT/JP2014/058552 WO2015145618A1 (fr) 2014-03-26 2014-03-26 Film de revêtement dur antireflet
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WO2024127722A1 (fr) * 2022-12-12 2024-06-20 日東電工株式会社 Composition de résine durcissable, film polarisant, film optique stratifié, et dispositif d'affichage d'image

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TWI648154B (zh) 2019-01-21

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