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WO2018159277A1 - Stratifié optique - Google Patents

Stratifié optique Download PDF

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Publication number
WO2018159277A1
WO2018159277A1 PCT/JP2018/004787 JP2018004787W WO2018159277A1 WO 2018159277 A1 WO2018159277 A1 WO 2018159277A1 JP 2018004787 W JP2018004787 W JP 2018004787W WO 2018159277 A1 WO2018159277 A1 WO 2018159277A1
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WO
WIPO (PCT)
Prior art keywords
cured product
layer
compound
optical laminate
curable composition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/004787
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English (en)
Japanese (ja)
Inventor
智 永安
政大 藤田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Chemical Co Ltd
Original Assignee
Sumitomo Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to KR1020197027660A priority Critical patent/KR102484820B1/ko
Priority to CN202111189703.XA priority patent/CN113917590B/zh
Priority to CN201880013787.1A priority patent/CN110325887B/zh
Publication of WO2018159277A1 publication Critical patent/WO2018159277A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
    • G02B5/3041—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks
    • G02B5/305—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid comprising multiple thin layers, e.g. multilayer stacks including organic materials, e.g. polymeric layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/023—Optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/29—Laminated material
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133528—Polarisers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/402—Coloured
    • B32B2307/4026—Coloured within the layer by addition of a colorant, e.g. pigments, dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/42—Polarizing, birefringent, filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
    • C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature

Definitions

  • the present invention relates to an optical laminate used for an image display panel or the like.
  • Patent Document 1 discloses a photocation curable type containing an aliphatic epoxy, an alicyclic epoxy and / or oxetane, and a photopolymerization initiator.
  • An adhesive curable composition
  • a cured product obtained by curing the adhesive functions as an adhesive.
  • transparent conductive films such as indium tin oxide (ITO) thin films have been widely used in display devices.
  • the transparent conductive film is formed on the opposite side of the liquid crystal display device using an in-plane switching (IPS) type liquid crystal cell from the side in contact with the liquid crystal layer of the transparent substrate constituting the liquid crystal cell. It is known to be a layer.
  • the transparent conductive film having the transparent conductive film formed on the transparent resin film is used for an electrode substrate of a touch panel, for example, a liquid crystal display device or an image display device used for a mobile phone, a portable music player, and the like. Input devices using a combination of touch panels have become widespread.
  • the dichroic dye contained in the polarizing film compares the adhesive layer. May be transmitted to the conductive layer, and may cause malfunction such as poor sensing. Since the movement of the dichroic dye from the polarizing film becomes remarkable particularly in a high temperature and high humidity environment, the dichroic dye contained in the polarizing film is also used in the pressure sensitive adhesive layer even in a high temperature and high humidity environment. Therefore, there is a need for an optical laminate that can prevent deterioration of the conductive layer due to the transition to the conductive layer.
  • an object of the present invention is to provide an optical laminate that can effectively suppress the migration of the dichroic dye contained in the polarizing film to the conductive layer and prevent the deterioration of the conductive layer.
  • a first cured product layer composed of a cured product of a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in a polyvinyl alcohol resin, an adhesive layer, An optical laminate in which the conductive layer is laminated in this order,
  • the first cured product layer is an optical laminate in which the absorbance increase rate represented by the following formula (1) is 30% or less.
  • Absorbance increase rate (%) (Abs after immersion (360 nm) ⁇ Abs before immersion (360 nm)) / Abs before immersion (360 nm) ⁇ 100 (1)
  • Abs (360 nm) after immersion indicates the absorbance at 360 nm after the cured product was immersed in an aqueous solution of 50% potassium iodide for 100 hours in an atmosphere at a temperature of 23 ° C. and a relative humidity of 60%.
  • a first cured product layer composed of a cured product of a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in a polyvinyl alcohol-based resin, an adhesive layer, An optical laminate in which the conductive layer is laminated in this order,
  • the polymerizable compound includes an oxetane compound having two or more oxetanyl groups, and the content of the oxetane compound is 40 parts by mass or more with respect to 100 parts by mass of the total amount of all polymerizable compounds contained in the curable composition.
  • An optical laminate [3] The optical laminate according to [1] or [2], wherein the thickness of the first cured product layer is 0.1 to 15 ⁇ m. [4] The optical laminate according to any one of [1] to [3], wherein the cured product constituting the first cured product layer is a photocured product of a curable composition containing the polymerizable compound. [5] The optical laminate according to any one of [1] to [4], wherein a second cured product layer and a protective film are laminated on the surface of the polarizing film opposite to the first cured product layer. . [6] The moisture permeability of the protective film is 1200 g at a temperature of 23 ° C. and a relative humidity of 55%. / The optical laminated body according to [5], which is 24 hours or shorter.
  • the optical layered body of the present invention can suppress the movement of the dichroic dye contained in the polarizing film to the conductive layer, and can effectively suppress the corrosion of the conductive layer.
  • mode of the optical laminated body of this invention is represented.
  • mode of the optical laminated body of this invention is represented.
  • the structure in one embodiment of the optical laminate of the present invention will be described with reference to FIG. 1.
  • the optical laminate 10 of the present invention has a first cured product layer 2 and an adhesive layer 3 on one surface of a polarizing film 1. And the conductive layer 4 are stacked in this order. If necessary, a protective film 6 may be provided on the surface of the polarizing film 1 opposite to the first cured product layer via the second cured product layer 5.
  • the conductive layer 4 of the optical laminate 10 is laminated on the substrate X.
  • the optical laminated body of this invention may have the 1st protective film 7 between the 1st hardened
  • FIG. This embodiment is shown in FIG. Even if the optical laminated body 10 is equipped with the 2nd protective film 6 via the 2nd hardened
  • the conductive layer 4 of the optical laminate 10 is laminated on the substrate X.
  • the optical layered body of the present invention is a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in a polyvinyl alcohol resin (hereinafter referred to as curable composition (1)).
  • curable composition (1) a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in a polyvinyl alcohol resin (hereinafter referred to as curable composition (1)).
  • a first cured product layer composed of a cured product.
  • the first cured product layer has an absorbance increase rate represented by the following formula (1) of 30% or less.
  • Absorbance increase rate (%) (Abs after immersion (360 nm) ⁇ Abs before immersion (360 nm)) / Abs before immersion (360 nm) ⁇ 100 (1)
  • Abs (360 nm) after immersion indicates the absorbance at 360 nm after the cured product was immersed in an aqueous solution of 50% potassium iodide for 100 hours in an atmosphere at a temperature of 23 ° C. and a relative humidity of 60%.
  • Abs (360 nm) indicates the absorbance at 360 nm before the cured product is immersed in a 50% aqueous potassium iodide solution]
  • the absorbance increase rate represented by the formula (1) is 30% or less. This indicates that the first cured product layer has relatively low absorbability with respect to iodine (dichroic dye).
  • the optical laminated body of this invention can suppress effectively the movement to the 1st hardened
  • the absorbance increase rate represented by the formula (1) is preferably 25% or less, more preferably 20% or less, still more preferably 15% or less, and particularly preferably 10% or less.
  • the absorbance increase rate is less than the above value, the movement of iodine (dichroic dye) contained in the polarizing film to the first cured product layer can be more effectively suppressed as described above, and corrosion of the conductive layer can be achieved.
  • the polymerizable compound contained in the curable composition (1) is not particularly limited as long as it can form a cured product constituting the first cured product layer.
  • the polymerizable compound include an active energy ray-curable resin composition, a water-soluble resin composition, a water-dispersible resin composition, and the like. Among these, from the viewpoint of simplifying the process, the active energy ray-curing property is used.
  • a resin composition is preferable, and (meth) acrylate compounds, acrylamide compounds, oxetane compounds, and epoxy compounds containing epoxy acrylate, urethane acrylate, and the like are particularly preferable.
  • the cured product constituting the first cured product layer is a photocured product of a curable composition containing a polymerizable compound.
  • the polymerizable compound is preferably a photocurable compound.
  • the polymerizable compound preferably contains an oxetane compound having two or more oxetanyl groups (oxetane ring) in the molecule (hereinafter sometimes referred to as “oxetane compound (A)”).
  • the oxetane compound (A) is a compound having two or more oxetanyl groups in the molecule, and may be an aliphatic compound, an alicyclic compound, or an aromatic compound. Specific examples of the oxetane compound (A) include 1,4-bis [ ⁇ (3-ethyloxetane-3-yl) methoxy ⁇ methyl] benzene (also called xylylene bisoxetane), bis (3-ethyl- 3-oxetanylmethyl) ether and the like. These oxetane compounds (A) may be used alone or in combination of a plurality of different types.
  • a dense cured product having a high crosslinking density can be obtained.
  • the cured product layer having a high crosslink density on one surface of the polarizing film, it is possible to effectively suppress the movement of the dichroic dye from the polarizing film.
  • the content of the oxetane compound (A) is, for example, 40 parts by mass or more, preferably 45 parts by mass or more, more preferably with respect to 100 parts by mass of the total amount of all polymerizable compounds contained in the curable composition (1). Is 50 parts by mass or more.
  • the content of the oxetane compound (A) is preferably 90 parts by mass or less, more preferably 80 parts by mass or less, with respect to 100 parts by mass of the total amount of all polymerizable compounds contained in the curable composition (1). More preferably, it is 70 mass parts or less, Most preferably, it is 65 mass parts or less.
  • the content of the oxetane compound (A) may be a combination of these lower limit value and upper limit value, and the total amount of all polymerizable compounds contained in the curable composition (1) is 100 parts by mass. However, it may be 40 to 65 parts by mass, more preferably 45 to 60 parts by mass. Moreover, content of an oxetane compound (A) is 35 mass parts or more with respect to 100 mass parts of total amounts of the said curable composition (1), Preferably it is 40 mass parts or more, More preferably, it is 45 mass parts. That's it.
  • the content of the oxetane compound (A) is not less than the above value, the movement of the dichroic dye contained in the polarizing film to the first cured product layer can be more effectively suppressed, and the corrosion of the conductive layer can be suppressed. In addition, it is possible to more effectively prevent the optical performance of the optical laminate from being deteriorated.
  • the polymerizable compound preferably further contains an epoxy compound (B).
  • the epoxy compound is preferably (B1) an aliphatic epoxy compound having two or more epoxy groups (hereinafter sometimes referred to as “aliphatic epoxy compound (B1)”), (B2) two or more epoxy groups.
  • An alicyclic epoxy compound hereinafter sometimes referred to as “alicyclic epoxy compound (B2)”
  • an aromatic epoxy compound having one or more aromatic rings hereinafter referred to as “aromatic epoxy”. At least one selected from “compound (B3)”.
  • the aliphatic epoxy compound (B1) is a compound having at least two oxirane rings bonded to an aliphatic carbon atom in the molecule.
  • Examples of the aliphatic epoxy compound (B1) include bifunctional compounds such as 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether, cyclohexane dimethanol diglycidyl ether, neopentyl glycol diglycidyl ether, and the like.
  • Epoxy compounds Trifunctional or higher functional epoxy compounds such as trimethylolpropane triglycidyl ether, pentaerythritol tetraglycidyl ether, and the like can be mentioned.
  • the aliphatic epoxy compound (B1) When the aliphatic epoxy compound (B1) is included, from the viewpoint of adhesion between the polarizing film and the protective film or the adhesive layer, a bifunctional epoxy compound having two oxirane rings bonded to an aliphatic carbon atom in the molecule (Also referred to as an aliphatic diepoxy compound) is preferred, and an aliphatic diepoxy compound represented by the following formula (I) is more preferred.
  • the curable composition contains an aliphatic diepoxy compound represented by the following formula (I) as the aliphatic epoxy compound (B1), a curable composition having a low viscosity and easy to apply can be obtained.
  • Z is an alkylene group having 1 to 9 carbon atoms, an alkylidene group having 3 or 4 carbon atoms, a divalent alicyclic hydrocarbon group, or a formula —C m H 2m —Z 1 —C n H It represents a divalent group represented by 2n-.
  • —Z 1 — represents —O—, —CO—O—, —O—CO—, —SO 2 —, —SO— or CO—
  • m and n each independently represents an integer of 1 or more. However, the sum of m and n is 9 or less.
  • the divalent alicyclic hydrocarbon group may be, for example, a divalent alicyclic hydrocarbon group having 4 to 8 carbon atoms, such as a divalent residue represented by the following formula (I-1): Is mentioned.
  • Specific examples of the compound represented by the formula (I) include diglycidyl ethers of alkanediols; diglycidyl ethers of oligoalkylene glycols having up to about 4 repetitions; diglycidyl ethers of alicyclic diols, and the like.
  • diol (glycol) that can form the compound represented by the formula (I) include ethylene glycol, propylene glycol, 1,3-propanediol, 2-methyl-1,3-propanediol, and 2-butyl-2- Ethyl-1,3-propanediol, 1,4-butanediol, neopentyl glycol, 3-methyl-2,4-pentanediol, 2,4-pentanediol, 1,5-pentanediol, 3-methyl-1 , 5-pentanediol, 2-methyl-2,4-pentanediol, 2,4-diethyl-1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 3,5-heptanediol , 1,8-octanediol, 2-methyl-1,8-octanediol,
  • Oligoalkylene glycols such as diethylene glycol, triethylene glycol, tetraethylene glycol and dipropylene glycol
  • alicyclic diols such as cyclohexanediol and cyclohexanedimethanol.
  • the aliphatic epoxy compound (B1) 1,4-butanediol diglycidyl ether, 1,6-hexanediol diene is used from the viewpoint that it can be formed into a curable composition having a low viscosity and easy to apply. Glycidyl ether and neopentyl glycol diglycidyl ether are preferred. In view of maintaining optical performance, 1,6-hexanediol diglycidyl ether and pentaerythritol polyglycidyl ether are preferable.
  • the aliphatic epoxy compound (B1) one kind of aliphatic epoxy compound may be used alone, or a plurality of different kinds may be used in combination.
  • curable composition (1) contains an aliphatic epoxy compound (B1)
  • content of an aliphatic epoxy compound (B1) is with respect to 100 mass parts of total amounts of all the polymeric compounds contained in a curable composition.
  • the amount is preferably 1 to 40 parts by mass, more preferably 3 to 30 parts by mass, still more preferably 5 to 20 parts by mass, particularly 7 to 15 parts by mass.
  • the curable composition (1) has a low viscosity and can be easily applied.
  • the alicyclic epoxy compound (B2) is a compound having two or more epoxy groups bonded to the alicyclic ring in the molecule.
  • “Epoxy group bonded to alicyclic ring” means the following formula (a):
  • m is an integer of 2 to 5.
  • a compound in which two or more groups in the form in which one or more hydrogen atoms in (CH 2 ) m in the above formula (a) are removed is bonded to another chemical structure is an alicyclic epoxy compound (B2 )
  • One or more hydrogen atoms in (CH 2 ) m may be appropriately substituted with a linear alkyl group such as a methyl group or an ethyl group.
  • an epoxycyclopentane structure (m 3 in the above formula (a)) or an epoxycyclohexane structure
  • R 1 and R 2 each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and when the alkyl group has 3 or more carbon atoms, it has an alicyclic structure. Also good.
  • the alkyl group having 1 to 6 carbon atoms may be a linear or branched alkyl group, and examples of the alkyl group having an alicyclic structure include a cyclopropyl group, a cyclobutyl group, and a cyclopentyl group.
  • X is an oxygen atom, an alkanediyl group having 1 to 6 carbon atoms, or the following formulas (IIa) to (IId):
  • alkanediyl group having 1 to 6 carbon atoms include a methylene group, an ethylene group, and a propane-1,2-diyl group.
  • Y 1 to Y 4 in each formula are each independently of 1 to 20 carbon atoms.
  • a and b each independently represents an integer of 0 to 20.
  • Examples of the compound represented by the formula (II) include the following compounds A to G.
  • the following chemical formulas A to G correspond to the compounds A to G, respectively.
  • the alicyclic epoxy compound (B2) is more preferably 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate from the viewpoint of easy availability. Further, from the viewpoint that corrosion of the conductive layer can be effectively suppressed, 1,2-epoxy-4- (2-oxiranyl) cyclohexane adduct of 2,2-bis (hydroxymethyl) -1-butanol is preferable.
  • a combination of 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate and 1,2-epoxy-4- (2-oxiranyl) cyclohexane adduct of 2,2-bis (hydroxymethyl) -1-butanol When used as an alicyclic epoxy compound (B2), corrosion of the conductive layer can be more effectively suppressed.
  • the alicyclic epoxy compound (B2) one type of alicyclic epoxy compound may be used alone, or a plurality of different types may be used in combination.
  • curable composition (1) contains an alicyclic epoxy compound (B2)
  • content of alicyclic epoxy compound (B2) is the total amount of all the polymerizable compounds contained in curable composition (1) 100.
  • the amount is preferably 3 to 70 parts by mass, more preferably 10 to 60 parts by mass, still more preferably 20 to 55 parts by mass, and particularly preferably 25 to 50 parts by mass with respect to parts by mass.
  • the aromatic epoxy compound (B3) is a compound having one or more aromatic rings in the molecule, and specific examples thereof include the following. Monohydric phenol having at least one aromatic ring such as phenol, cresol, butylphenol or the like, or a mono / polyglycidyl etherified product of an alkylene oxide adduct thereof, such as bisphenol A, bisphenol F, or a compound obtained by further adding an alkylene oxide thereto Glycidyl etherified products and epoxy novolac resins; A glycidyl ether of an aromatic compound having two or more phenolic hydroxyl groups such as resorcinol, hydroquinone, catechol; Mono / polyglycidyl etherified products of aromatic compounds having two or more alcoholic hydroxyl groups such as benzenedimethanol, benzenediethanol, benzenedibutanol; Glycidyl esters of polybasic aromatic compounds having two or more carboxylic acids such as phthalic acid, terephthalic acid, trim
  • the aromatic epoxy compound (B3) when included, from the viewpoint of reducing the viscosity of the curable composition, glycidyl ether of phenols, glycidyl etherified products of aromatic compounds having two or more alcoholic hydroxyl groups, polyhydric phenols It preferably contains at least one selected from the group consisting of glycidyl etherified products, glycidyl esters of benzoic acids, glycidyl esters of polybasic acids, styrene oxide or epoxidized products of divinylbenzene. Further, in order to improve the curability of the curable composition, the aromatic epoxy compound (B3) preferably has an epoxy equivalent of 80 to 500. As the aromatic epoxy compound (B3), one kind of aromatic epoxy compound may be used alone, or a plurality of different kinds may be used in combination.
  • aromatic epoxy compound (B3) commercially available products can be used.
  • the curable composition contains the aromatic epoxy compound (B3)
  • the curable composition becomes a hydrophobic resin, and the cured product layer obtained thereby becomes hydrophobic. For this reason, the penetration
  • the content of the aromatic epoxy compound (B3) is 100 mass of the total polymerizable compound contained in the curable composition (1).
  • the amount is preferably 1 to 70 parts by mass, more preferably 5 to 60 parts by mass, still more preferably 7 to 55 parts by mass, and particularly preferably 10 to 50 parts by mass with respect to parts.
  • the content of the aromatic epoxy compound (B3) is in the above range, the hydrophobicity of the cured product layer can be improved, and the permeability of the dichroic dye (iodine) to the cured product layer can be reduced.
  • curable composition (1) contains oxetane compound (A) and alicyclic epoxy compound (B2), content of alicyclic epoxy compound (B2) with respect to content (WA) of oxetane compound (A)
  • the mass ratio (WB2 / WA) of the amount (WB2) is preferably 0.05 to 1.5.
  • curable composition (1) contains oxetane compound (A) and aliphatic epoxy compound (B1)
  • content of aliphatic epoxy compound (B1) with respect to content (WA) of oxetane compound (A) ( The mass ratio (WB1 / WA) of WB1) is preferably 0.1 to 0.5.
  • curable composition (1) contains oxetane compound (A) and aromatic epoxy compound (B3)
  • content of aromatic epoxy compound (B1) with respect to content (WA) of oxetane compound (A) is preferably 0.1 to 1.5.
  • the curable composition (1) may contain a polymerizable compound other than the oxetane compound (A) and the epoxy compound (B). Specific examples include aliphatic monoepoxy compounds and alicyclic monoepoxy compounds.
  • the content of the polymerizable compound contained in the curable composition (1) is preferably 80 to 100 parts by mass, more preferably 90 to 99.99 parts by mass with respect to 100 parts by mass of the total mass of the curable composition (1).
  • the amount is 5 parts by mass, more preferably 95 to 99 parts by mass.
  • the curable composition usually contains a polymerization initiator for initiating polymerization.
  • the polymerization initiator may be a photopolymerization initiator (for example, a photocationic polymerization initiator or a radical photopolymerization initiator) or a thermal polymerization initiator.
  • a curable composition contains the said oxetane compound (A), an epoxy compound (B), etc. as a polymeric compound, it is preferable to use a photocationic polymerization initiator for a polymerization initiator.
  • the cationic photopolymerization initiator generates a cationic species or a Lewis acid by irradiation with active energy rays such as visible light, ultraviolet rays, X-rays, or electron beams, and initiates a polymerization reaction of the cationically polymerizable compound. . Since the cationic photopolymerization initiator acts catalytically by light, it is excellent in storage stability and workability even when mixed with a polymerizable compound.
  • Examples of the compound that generates a cationic species or a Lewis acid upon irradiation with active energy rays include onium salts such as aromatic iodonium salts and aromatic sulfonium salts, aromatic diazonium salts, and iron-arene complexes.
  • the aromatic iodonium salt is a compound having a diaryl iodonium cation, and typical examples of the cation include a diphenyl iodonium cation.
  • the aromatic sulfonium salt is a compound having a triarylsulfonium cation, and typical examples of the cation include a triphenylsulfonium cation and a 4,4′-bis (diphenylsulfonio) diphenylsulfide cation.
  • the aromatic diazonium salt is a compound having a diazonium cation, and typical examples of the cation include a benzenediazonium cation.
  • the iron-arene complex is typically a cyclopentadienyl iron (II) arene cation complex salt.
  • the cation shown above forms a photocationic polymerization initiator in combination with an anion (anion).
  • anions constituting the photocationic polymerization initiator special phosphorus anions [(Rf) n PF 6-n ] ⁇ , hexafluorophosphate anion PF 6 ⁇ , hexafluoroantimonate anion SbF 6 ⁇ , pentafluorohydroxyantimonate Anion SbF 5 (OH) ⁇ , hexafluoroarsenate anion AsF 6 ⁇ , tetrafluoroborate anion BF 4 ⁇ , tetrakis (pentafluorophenyl) borate anion B (C 6 F 5 ) 4 — and the like can be mentioned.
  • cationic photopolymerization initiator special phosphorus-based anion [(Rf) n PF 6- n] -, hexafluorophosphate anion PF 6 - It is preferable that
  • the photocationic polymerization initiator may be used alone or in combination with a plurality of different types.
  • aromatic sulfonium salts are preferable because they have ultraviolet absorption characteristics even in a wavelength region near 300 nm, and are excellent in curability and can provide a cured product having good mechanical strength and adhesive strength.
  • the content of the polymerization initiator in the curable composition (1) is usually 0.5 to 10 parts by weight, preferably 6 parts by weight or less, more preferably 3 parts by weight with respect to 100 parts by weight of the polymerizable compound. Or less.
  • the content of the polymerization initiator is within the above range, the polymerizable compound can be sufficiently cured, and high mechanical strength and adhesive strength can be given to the cured product layer formed from the obtained cured product.
  • the product from the cationic photopolymerization initiator may react with the hydroxyl group of polyvinyl alcohol constituting the polarizing film, thereby reducing the optical performance of the polarizing film.
  • the curable composition (1) can contain additives generally used in the curable composition as necessary.
  • additives include ion trapping agents, antioxidants, chain transfer agents, polymerization accelerators (polyols, etc.), sensitizers, sensitization aids, light stabilizers, tackifiers, thermoplastic resins. , Fillers, flow regulators, plasticizers, antifoaming agents, leveling agents, silane coupling agents, dyes, antistatic agents, ultraviolet absorbers and the like.
  • the sensitizer examples include a photosensitizer.
  • the photosensitizer is a compound that exhibits maximum absorption at a wavelength longer than the maximum absorption wavelength exhibited by the photocationic polymerization initiator and promotes the polymerization initiation reaction by the photocationic polymerization initiator.
  • the photosensitizing aid is a compound that further promotes the action of the photosensitizer.
  • the photosensitizer is preferably a compound that exhibits maximum absorption in light having a wavelength longer than 380 nm, for example.
  • Examples of the photosensitizer include anthracene compounds described below. 9,10-dimethoxyanthracene, 9,10-diethoxyanthracene, 9,10-dipropoxyanthracene, 9,10-diisopropoxyanthracene, 9,10-dibutoxyanthracene, 9,10-dipentyloxyanthracene, 9,10-dihexyloxyanthracene, 9,10-bis (2-methoxyethoxy) anthracene, 9,10-bis (2-ethoxyethoxy) anthracene, 9,10-bis (2-butoxyethoxy) anthracene, 9,10-bis (3-butoxypropoxy) anthracene, 2-methyl- or 2-ethyl-9,10-dimethoxyanthracene, 2-methyl- or 2-eth
  • the curable composition (1) is obtained by mixing a polymerizable compound, a polymerization initiator, and additives as necessary.
  • cured material layer apply
  • the light source for curing the curable composition (1) examples include an active energy ray light source.
  • the light source of the active energy ray may be any light source that generates ultraviolet rays, electron beams, X-rays, and the like.
  • a light source having a light emission distribution at a wavelength of 400 nm or less is preferable, and examples thereof include a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a chemical lamp, a black light lamp, a microwave excitation mercury lamp, and a metal halide lamp.
  • Light irradiation intensity at the time of curing the curable composition (1) is different for each composition, the light irradiation intensity of the wavelength region effective for activation of the polymerization initiator is 0.1 ⁇ 1000mW / cm 2 It is preferable. If the light irradiation intensity at the time of curing of the curable composition (1) is too small, the time required for the reaction to proceed sufficiently increases, and conversely, if the light irradiation intensity is too large, the heat radiated from the lamp. In addition, heat generated during polymerization of the curable composition (1) may cause deterioration of a film to be attached.
  • the light irradiation time at the time of curing of the curable composition (1) is controlled for each composition and is not particularly limited, but the integrated light amount expressed as the product of the light irradiation intensity and the light irradiation time is 10. It is preferable to set it to ⁇ 5000 mJ / cm 2 . If the integrated light quantity is too small, the generation of active species derived from the polymerization initiator is not sufficient, and the resulting curing may be insufficient. On the other hand, if the integrated light quantity is too large, the irradiation time becomes very long, which is disadvantageous for improving productivity.
  • the curable composition is cured by irradiation with active energy rays, for example, the polarization degree of the polarizing film, the transmittance and the hue, and the transparency of various films constituting the protective film and the optical layer, for example, It is preferable to perform the curing under conditions that do not deteriorate the various functions.
  • the thickness of the first cured product layer is not particularly limited, but is preferably 0.1 to 15 ⁇ m, more preferably 0.5 to 10 ⁇ m, and still more preferably 0.5. ⁇ 7 ⁇ m.
  • the thickness of the first cured product layer is at least the lower limit value, the movement of the dichroic dye can be effectively suppressed, and when it is at most the upper limit value, the curable composition can be sufficiently cured. .
  • the absorbance increase rate of the first cured product layer is 30%, and the absorbability with respect to the dichroic dye is relatively low.
  • the movement of the dichroic dye can be accelerated by the ingress of moisture from the outside.
  • the first curing of the dichroic dye contained in the polarizing film is performed. The movement to the physical layer can be effectively suppressed. For this reason, even when placed in a high-temperature and high-humidity environment, corrosion of the conductive layer can be effectively prevented, and optical performance can be maintained.
  • the pressure-sensitive adhesive layer constituting the optical laminate includes an ionic compound as an antistatic agent
  • the ionic compound present in the pressure-sensitive adhesive layer is transmitted through the protective film constituting the optical laminate and polarized. It may move to a film and cause an interaction with the dichroic dye in the polarizing film to deteriorate the optical performance of the optical laminate. Since the first cured product layer is present between the polarizing film and the adhesive layer, the optical laminate of the present invention can effectively suppress the movement of the ionic compound from the adhesive layer. The deterioration of the optical performance of the body can be prevented.
  • cured material layer also plays the role as an adhesive bond layer which adhere
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer conventionally known pressure-sensitive adhesives can be used without particular limitation.
  • an acrylic resin, a rubber-based resin, a urethane-based resin, a silicone-based resin, a polyvinyl ether-based resin, or the like is used as a base polymer.
  • an energy ray curable pressure sensitive adhesive, a thermosetting pressure sensitive adhesive, or the like may be used.
  • an adhesive having a base polymer of an acrylic resin that is excellent in transparency, adhesive strength, reworkability, weather resistance, heat resistance, and the like is preferable.
  • the adhesive layer contains an acrylic resin
  • the acrylic resin is not particularly limited, and conventionally known ones can be used.
  • the adhesive layer contained in the optical laminate of the present invention preferably contains the following acrylic resin (P).
  • the acrylic resin (P) has the following formula (III):
  • R a represents a hydrogen atom or a methyl group
  • R b represents an alkyl group having 1 to 14 carbon atoms which may be substituted with an alkoxy group having 1 to 10 carbon atoms
  • polar functional group-containing monomer An acrylic resin containing a structural unit derived from
  • (meth) acrylic acid means that either acrylic acid or methacrylic acid may be used, and in addition, “(meth)” when referred to as (meth) acrylate or the like has the same purpose. It is.
  • Examples of the (meth) acrylic acid alkyl ester (P1) represented by the formula (III) include methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, n-octyl acrylate, and lauryl acrylate.
  • Linear alkyl acrylates Linear alkyl acrylates; branched alkyl acrylates such as isobutyl acrylate, 2-ethylhexyl acrylate, and isooctyl acrylate; methyl methacrylate, ethyl methacrylate, propyl methacrylate, n-methacrylate
  • Linear alkyl methacrylates such as butyl, n-octyl methacrylate, and lauryl methacrylate
  • branched alkyl esters such as isobutyl methacrylate, 2-ethylhexyl methacrylate, and isooctyl methacrylate 2-methoxyethyl acrylate, ethoxymethyl acrylate, methacrylate, 2-methoxyethyl, and methacrylate ethoxymethyl and the like.
  • n-butyl acrylate is preferable, and specifically, n-butyl acrylate is preferably 50% by mass or more based on the total amount of all monomers constituting the acrylic resin (P).
  • These (meth) acrylic acid alkyl esters (P1) may be used alone or in combination of two or more different types.
  • examples of the polar functional group include a free carboxyl group, a hydroxyl group, an amino group, and a heterocyclic group including an epoxy group.
  • the polar functional group-containing monomer (P2) is preferably a (meth) acrylic acid compound having a polar functional group.
  • Examples thereof include unsaturated monomers having a free carboxyl group such as acrylic acid, methacrylic acid, and ⁇ -carboxyethyl acrylate; 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, ( Unsaturated monomers having a hydroxyl group such as 2-methacrylic acid 2- or 3-chloro-2-hydroxypropyl and diethylene glycol mono (meth) acrylate; acryloylmorpholine, vinylcaprolactam, N-vinyl-2-pyrrolidone, tetrahydrofur Unsaturated monocyclic compounds having heterocyclic groups such as furyl (meth) acrylate, caprolactone-modified tetrahydrofurfuryl acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, glycidyl (meth) acrylate, and 2,5-dihydrofuran Body; N, and the like unsaturated mono
  • the polar functional group-containing monomer (P2) is preferably an unsaturated monomer having a hydroxyl group.
  • an unsaturated monomer having a hydroxyl group it is also effective to use an unsaturated monomer having another polar functional group, for example, an unsaturated monomer having a free carboxyl group.
  • the structural unit derived from the (meth) acrylic acid alkyl ester (P1) represented by the formula (III) is 100 parts by mass in total of all the structural units constituting the acrylic resin (P). For example, 50 to 100 parts by mass.
  • the structural unit derived from the polar functional group-containing monomer (P2) is, for example, 0.1 to 20 parts by mass with respect to 100 parts by mass of the total amount of all structural units constituting the acrylic resin (P).
  • the acrylic resin (P) includes a structural unit derived from a monomer different from the (meth) acrylic acid alkyl ester (P1) and the polar functional group-containing monomer (P2) represented by the formula (III). May be. Examples thereof include an unsaturated monomer (P3) having one olefinic double bond and at least one aromatic ring in the molecule (hereinafter sometimes referred to as “aromatic ring-containing monomer”).
  • the unsaturated monomer (aromatic ring-containing monomer) (P3) having one olefinic double bond and at least one aromatic ring in the molecule is a group containing an olefinic double bond (meta )
  • Those having an acryloyl group are preferred. Examples thereof include benzyl (meth) acrylate, neopentyl glycol benzoate (meth) acrylate, etc. Among them, formula (IV):
  • R 3 represents a hydrogen atom or a methyl group
  • n is an integer of 1 ⁇ 8
  • R 4 is a hydrogen atom, an alkyl group having 1-9 carbon atoms, an aralkyl group or C 7 to 11 carbon atoms
  • Examples of the alkyl group having 1 to 9 carbon atoms include methyl, butyl and nonyl.
  • Examples of the aralkyl group having 7 to 11 carbon atoms include benzyl, phenethyl, naphthylmethyl and the like.
  • Examples of the aryl group having 6 to 10 carbon atoms include phenyl, tolyl, naphthyl and the like.
  • aromatic ring-containing (meth) acrylic compound represented by the formula (IV) examples include (meth) acrylic acid 2-phenoxyethyl, (meth) acrylic acid 2- (2-phenoxyethoxy) ethyl, and ethylene oxide-modified nonylphenol (meth) ) Acrylic acid ester, 2- (o-phenylphenoxy) ethyl (meth) acrylate, and the like. These aromatic ring-containing monomers may be used alone or in combination of a plurality of different types.
  • the alicyclic structure in the structural unit derived from the (meth) acrylic acid ester having an alicyclic structure in the molecule is a cycloparaffin structure having usually 5 or more carbon atoms, preferably 5 to 7 carbon atoms.
  • Specific examples of the acrylate ester having an alicyclic structure include isobornyl acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, cyclododecyl acrylate, methylcyclohexyl acrylate, trimethylcyclohexyl acrylate, and tert-butyl acrylate.
  • methacrylic acid esters having an alicyclic structure examples include isobornyl methacrylate, cyclohexyl methacrylate, dicyclopentanyl methacrylate, methacrylic acid, and the like, such as cyclohexyl, ⁇ -ethoxyacrylate cyclohexyl, and cyclohexyl phenyl acrylate. Cyclododecyl, methyl cyclohexyl methacrylate, trimethyl cyclohexyl methacrylate, tert-butyl cyclohexyl methacrylate, cyclohexyl methacrylate Phenyl and the like.
  • styrenic monomer examples include styrene, methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, triethyl styrene, propyl styrene, butyl styrene, hexyl styrene, heptyl styrene, octyl styrene, and the like.
  • Alkyl styrenes such as fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene, and iodostyrene; and nitrostyrene, acetylstyrene, methoxystyrene, divinylbenzene, and the like.
  • vinyl monomers include fatty acid vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, and vinyl laurate; halogenations such as vinyl chloride and vinyl bromide.
  • Vinyl; vinylidene halides such as vinylidene chloride; nitrogen-containing aromatic vinyls such as vinyl pyridine, vinyl pyrrolidone, and vinyl carbazole; conjugated diene monomers such as butadiene, isoprene, and chloroprene; and acrylonitrile, methacrylate Ronitrile etc. can be mentioned.
  • the monomer having a plurality of (meth) acryloyl groups in the molecule include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, and 1,9-nonane.
  • Monomers different from the (meth) acrylic acid alkyl ester (P1) and the polar functional group-containing monomer (P2) represented by the formula (III) may be used alone or in combination of two or more. it can.
  • the structural unit derived from a monomer different from the (meth) acrylic acid alkyl ester (P1) and the polar functional group-containing monomer (P2) is an acrylic resin.
  • the amount is usually 0 to 30 parts by mass with respect to 100 parts by mass as the total amount of all structural units constituting (P).
  • the resin component constituting the pressure-sensitive adhesive composition is an acrylic resin containing a structural unit derived from the (meth) acrylic acid alkyl ester (P1) and the polar functional group-containing monomer (P2) represented by the formula (III). Two or more types may be included.
  • an acrylic resin different from the acrylic resin (P) for example, an acrylic resin having a structural unit derived from a (meth) acrylic acid alkyl ester of the formula (III) and containing no polar functional group is mixed. May be used.
  • the acrylic resin (P) containing a structural unit derived from the (meth) acrylic acid alkyl ester (P1) and the polar functional group-containing monomer (P2) represented by the formula (III) is an acrylic resin contained in the adhesive layer
  • it may be 70 parts by mass or more with respect to the total amount of 100 parts by mass.
  • the acrylic resin (P) which is a copolymer of a monomer mixture containing the (meth) acrylic acid alkyl ester (P1) represented by the formula (III) and the polar functional group-containing monomer (P2), is gel permeation. It is preferable that the weight average molecular weight Mw in terms of standard polystyrene by the chromatography chromatography (GPC) is in the range of 1 million to 2 million. When the weight average molecular weight in terms of standard polystyrene is within the above range, the adhesiveness under high temperature and high humidity is improved, and there is a tendency that the possibility of peeling or floating between the conductive layer and the adhesive layer is reduced. Furthermore, reworkability tends to be improved.
  • GPC chromatography chromatography
  • the adhesive layer easily follows the change in dimension, and for example, when the optical laminate is bonded to the liquid crystal cell, the brightness and center of the peripheral edge of the liquid crystal cell There is no difference between the brightness and the whiteness and the color unevenness tends to be suppressed.
  • the molecular weight distribution represented by the ratio Mw / Mn between the weight average molecular weight Mw and the number average molecular weight Mn is preferably in the range of 3-7.
  • the molecular weight distribution Mw / Mn is in the range of 3 to 7, the occurrence of defects such as white spots can be suppressed even when the liquid crystal display panel or the liquid crystal display device is exposed to a high temperature.
  • the acrylic resin (P) preferably has a glass transition temperature in the range of ⁇ 10 to ⁇ 60 ° C. from the viewpoint of developing adhesiveness.
  • the glass transition temperature of the resin can generally be measured with a differential scanning calorimeter.
  • the acrylic resin (P) can be produced by various known methods such as a solution polymerization method, an emulsion polymerization method, a bulk polymerization method, and a suspension polymerization method.
  • a polymerization initiator is usually used in the production of the acrylic resin (P).
  • the content of the polymerization initiator is preferably 0.001 to 5 parts by mass with respect to 100 parts by mass in total of all monomers used for the production of the acrylic resin.
  • the polymerization initiator a thermal polymerization initiator, a photopolymerization initiator, or the like is used.
  • the photopolymerization initiator include 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone.
  • thermal polymerization initiators examples include 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-methylbutyronitrile), 1,1′-azobis (cyclohexane-1-carbonitrile), 2,2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (2,4-dimethyl-4-methoxyvaleronitrile), dimethyl-2,2′-azobis (2-methylpropio) And azo compounds such as 2,2′-azobis (2-hydroxymethylpropionitrile); lauryl peroxide, tert-butyl hydroperoxide, benzoyl peroxide, tert-butyl peroxybenzoate, cumene hydroper Oxide, diisopropyl peroxydicarbonate, dipropyl peroxydicarbonate, te Organic peroxides such as t-butyl peroxyneodecanoate, tert-butyl peroxypivalate, and (3,5,5-tri
  • a solution polymerization method is particularly preferable.
  • a specific example of the solution polymerization method will be described.
  • a desired monomer and an organic solvent are mixed, a thermal polymerization initiator is added under a nitrogen atmosphere, and a temperature of 40 to 90 ° C., preferably 50 to 80 ° C. is set.
  • a method of stirring for ⁇ 10 hours can be mentioned.
  • examples of the organic solvent include aromatic hydrocarbons such as toluene and xylene; esters such as ethyl acetate and butyl acetate; aliphatic alcohols such as propyl alcohol and isopropyl alcohol; acetone, methyl ethyl ketone, and methyl isobutyl. Ketones such as ketones can be used.
  • the adhesive layer contained in the optical layered body of the present invention is preferably composed of an acrylic resin (P) and a crosslinking agent in combination.
  • the crosslinking agent is a compound that reacts with a structural unit derived from the polar functional group-containing monomer (P2) in the acrylic resin (P) to crosslink the acrylic resin.
  • Specific examples include isocyanate compounds, epoxy compounds, aziridine compounds, metal chelate compounds, and the like.
  • the isocyanate compound, the epoxy compound, and the aziridine compound have at least two functional groups in the molecule that can react with the polar functional group in the acrylic resin (P).
  • Isocyanate compounds are compounds having at least two isocyanato groups (—NCO) in the molecule, such as tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, diphenylmethane diisocyanate, Examples thereof include hydrogenated diphenylmethane diisocyanate, naphthalene diisocyanate, and triphenylmethane triisocyanate.
  • —NCO isocyanato groups
  • adducts obtained by reacting these isocyanate compounds with polyols such as glycerol and trimethylolpropane, and those obtained by converting isocyanate compounds to dimers and trimers can also be used as a crosslinking agent for pressure-sensitive adhesives.
  • Two or more isocyanate compounds can be mixed and used.
  • the epoxy compound is a compound having at least two epoxy groups in the molecule, for example, bisphenol A type epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether. 1,6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, N, N-diglycidylaniline, N, N, N ′, N′-tetraglycidyl-m-xylenediamine, 1,3-bis ( N, N′-diglycidylaminomethyl) cyclohexane and the like. Two or more types of epoxy compounds can be mixed and used.
  • An aziridine-based compound is a compound having at least two 3-membered ring skeletons composed of one nitrogen atom and two carbon atoms, also called ethyleneimine, for example, diphenylmethane-4,4′-bis ( 1-aziridinecarboxamide), toluene-2,4-bis (1-aziridinecarboxamide), triethylenemelamine, isophthaloylbis-1- (2-methylaziridine), tris-1-aziridinylphosphine oxide, hexamethylene 1,6-bis (1-aziridinecarboxamide), trimethylolpropane, tris- ⁇ -aziridinylpropionate, tetramethylolmethane, tris- ⁇ -aziridinylpropionate, and the like.
  • metal chelate compound for example, acetylacetone or ethyl acetoacetate is coordinated to a polyvalent metal such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium, and zirconium. Compound etc. are mentioned.
  • isocyanate compounds especially xylylene diisocyanate, tolylene diisocyanate or hexamethylene diisocyanate, or adducts obtained by reacting these isocyanate compounds with polyols such as glycerol and trimethylolpropane, Those obtained by making these isocyanate compounds into dimers, trimers or the like, or those obtained by mixing these isocyanate compounds are preferably used.
  • the polar functional group-containing monomer (P2) has a polar functional group selected from a free carboxyl group, a hydroxyl group, an amino group, and an epoxy group, it is preferable to use at least one isocyanate compound as a crosslinking agent.
  • tolylene diisocyanate adducts obtained by reacting tolylene diisocyanate with polyols, tolylene diisocyanate dimers, and tolylene diisocyanate trimers, hexamethylene diisocyanate, hexamethylene diisocyanate are suitable isocyanate compounds.
  • adducts obtained by reacting with a polyol, a dimer of hexamethylene diisocyanate, and a trimer of hexamethylene diisocyanate are suitable isocyanate compounds.
  • the crosslinking agent may be, for example, 0.01 to 10 parts by mass with respect to 100 parts by mass of the acrylic resin (P).
  • the amount of the crosslinking agent is within the above range, the durability of the pressure-sensitive adhesive layer tends to be improved, and white spots on the liquid crystal display panel tend to be inconspicuous.
  • the pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer preferably contains a silane-based compound, and in particular, the acrylic resin before the crosslinking agent is mixed preferably contains a silane-based compound. Since the silane-based compound improves the adhesive strength to glass, high adhesive strength to the display panel can be ensured by including the silane-based compound.
  • silane compound examples include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-amino Ethyl) -3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyl Trimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxy Run, 3-
  • the silane compound may be of a silicone oligomer type.
  • silicone oligomer is shown in the form of (monomer)-(monomer) copolymer, for example, the following can be mentioned.
  • Mercaptomethyl such as mercaptomethyltrimethoxysilane-tetramethoxysilane copolymer, mercaptomethyltrimethoxysilane-tetraethoxysilane copolymer
  • the compounding amount of the silane compound in the pressure-sensitive adhesive may be, for example, 0.01 to 10 parts by mass with respect to 100 parts by mass of the acrylic resin (P) (the total amount when two or more types are used).
  • P the acrylic resin
  • the adhesion between the adhesive layer and the substrate (or the liquid crystal cell) is preferably improved. It is preferable because bleeding tends to be suppressed.
  • the adhesive layer may contain an ionic compound.
  • the ionic compound can function as an antistatic agent.
  • the acrylic resin (P) contains the aromatic ring-containing (meth) acrylic compound represented by the formula (IV) and n in the formula (IV) is 2 or more, it is effective for suppressing white spots.
  • an ionic compound to the pressure-sensitive adhesive containing an acrylic resin copolymerized with this monomer, it is possible to impart good antistatic properties while imparting a whitening suppression effect.
  • the ionic compound here is a compound that exists in a combination of a cation and an anion, and the cation and the anion may be inorganic or organic, respectively, but the acrylic resin (P) and From the viewpoint of compatibility, it is preferable that at least one of the cation and the anion is an ionic compound containing an organic group.
  • Examples of inorganic cations constituting the ionic compound include alkali metal ions such as lithium cation [Li + ], sodium cation [Na + ], potassium cation [K + ], cesium cation [Cs + ]; beryllium cation [Be 2+ ], magnesium cation [Mg 2+ ], calcium cation [Ca 2+ ] and other alkaline earth metal ions.
  • alkali metal ions such as lithium cation [Li + ], sodium cation [Na + ], potassium cation [K + ], cesium cation [Cs + ]; beryllium cation [Be 2+ ], magnesium cation [Mg 2+ ], calcium cation [Ca 2+ ] and other alkaline earth metal ions.
  • lithium cation [Li + ] potassium cation [K + ] or sodium cation [Na + ]
  • potassium cation [K + ] is preferable. More
  • Examples of the organic cation constituting the ionic compound include a pyridinium cation represented by the following formula (V): a quaternary ammonium cation represented by the following formula (VI).
  • R 5 to R 9 each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms
  • R 10 represents an alkyl group having 1 to 16 carbon atoms
  • R 11 represents an alkyl group having 1 to 12 carbon atoms
  • R 12 , R 13, and R 14 each independently represents an alkyl group having 6 to 12 carbon atoms.
  • the pyridinium cation represented by the above formula (V) preferably has a total carbon number of 8 or more, particularly 10 or more from the viewpoint of compatibility with the acrylic resin (P).
  • the total number of carbon atoms is preferably 36 or less, more preferably 30 or less.
  • R 7 bonded to the 4-position carbon atom of the pyridine ring is an alkyl group, and R 5 , R 6 , R bonded to other carbon atoms of the pyridine ring.
  • 8 and R 9 are each a hydrogen atom is one of the preferred cations.
  • pyridinium cation represented by the formula (V) include N-methyl-4-hexylpyridinium cation, N-butyl-4-methylpyridinium cation, N-butyl-2,4-diethylpyridinium cation, N- Butyl-2-hexylpyridinium cation, N-hexyl-2-butylpyridinium cation, N-hexyl-4-methylpyridinium cation, N-hexyl-4-ethylpyridinium cation, N-hexyl-4-butylpyridinium cation, N- Examples include octyl-4-methylpyridinium cation, N-octyl-4-ethylpyridinium cation, and N-octylpyridinium cation.
  • the ammonium cation represented by the above formula (VI) preferably has a total carbon number of 20 or more, and more preferably 22 or more from the viewpoint of compatibility with the acrylic resin (P).
  • the total number of carbon atoms is preferably 36 or less, more preferably 30 or less.
  • tetraalkylammonium cation represented by the formula (VI) include a tetrahexylammonium cation, a tetraoctylammonium cation, a tributylmethylammonium cation, a trihexylmethylammonium cation, a trioctylmethylammonium cation, a tridecylmethylammonium cation, Examples include trihexylethylammonium cation and trioctylethylammonium cation.
  • anions constituting an ionic compound include chloride anions [Cl ⁇ ], bromide anions [Br ⁇ ], iodide anions [I ⁇ ], tetrachloroaluminate anions [AlCl 4 ⁇ ], heptachlorodi Aluminate anion [Al 2 Cl 7 ⁇ ], tetrafluoroborate anion [BF 4 ⁇ ], hexafluorophosphate anion [PF 6 ⁇ ], perchlorate anion [ClO 4 ⁇ ], nitrate anion [NO 3 ⁇ ], acetate Anion [CH 3 COO ⁇ ], trifluoroacetate anion [CF 3 COO ⁇ ], methanesulfonate anion [CH 3 SO 3 ⁇ ], trifluoromethanesulfonate anion [CF 3 SO 3 ⁇ ], bis (trifluoromethanesulfonyl) i Midani
  • ionic compound can be appropriately selected from the combination of the above cation and anion.
  • ionic compounds that are combinations of cations and anions include lithium bis (trifluoromethanesulfonyl) imide, lithium hexafluorophosphate, lithium iodide (lithium iodide), lithium bis (pentafluoroethanesulfonyl) imide, and lithium tris.
  • Trifluoromethanesulfonyl methanide, sodium bis (trifluoromethanesulfonyl) imide, sodium bis (pentafluoroethanesulfonyl) imide, sodium tris (trifluoromethanesulfonyl) methanide, potassium bis (trifluoromethanesulfonyl) imide, potassium bis (pentafluoroethane) (Sulfonyl) imide, potassium tris (trifluoromethanesulfonyl) methanide, N-methyl- -Hexylpyridinium bis (trifluoromethanesulfonyl) imide, N-butyl-2-methylpyridinium bis (trifluoromethanesulfonyl) imide, N-hexyl-4-methylpyridinium bis (trifluoromethanesulfonyl) imide, N-octyl-4-methyl Pyridinium bis (trifluflu
  • ionic compounds can be used alone or in combination of two or more.
  • the amount thereof may be, for example, 0.1 to 10 parts by mass with respect to 100 parts by mass of the acrylic resin (P).
  • the adhesive layer may further contain a crosslinking catalyst, a weather resistance stabilizer, a tackifier, a plasticizer, a softener, a dye, a pigment, an inorganic filler, a resin other than an acrylic resin, and the like. It is also useful to form a harder adhesive layer by blending an ultraviolet curable compound such as a polyfunctional acrylate and a photoinitiator into the adhesive, and irradiating and curing the ultraviolet ray after forming the adhesive layer. This embodies the second cross-linked structure in the pressure-sensitive adhesive, and plays a role of improving durability during a heat test.
  • a crosslinking catalyst such as a polyfunctional acrylate and a photoinitiator
  • the pressure-sensitive adhesive layer can be prepared by aging in a short time.
  • the pressure-sensitive adhesive layer and the first cured product layer or the first protective film It is possible to suppress the occurrence of floating or peeling between the layers or foaming in the adhesive layer, and the reworkability may be improved.
  • crosslinking catalyst examples include amine compounds such as hexamethylenediamine, ethylenediamine, polyethyleneimine, hexamethylenetetramine, diethylenetriamine, triethylenetetramine, isophoronediamine, trimethylenediamine, polyamino resin, and melamine resin.
  • amine compounds such as hexamethylenediamine, ethylenediamine, polyethyleneimine, hexamethylenetetramine, diethylenetriamine, triethylenetetramine, isophoronediamine, trimethylenediamine, polyamino resin, and melamine resin.
  • the adhesive layer can also be a pressure-sensitive adhesive layer containing light particles by containing fine particles.
  • the adhesive layer may contain an antioxidant, an ultraviolet absorber and the like.
  • ultraviolet absorbers include salicylic acid ester compounds, benzophenone compounds, benzotriazole compounds, cyanoacrylate compounds, and nickel complex compounds.
  • the pressure-sensitive adhesive layer is provided by, for example, applying the above-mentioned pressure-sensitive adhesive as an organic solvent solution, applying it on a film or layer (for example, a polarizing film, etc.) to be laminated with a die coater or a gravure coater, and drying. Can do. Moreover, it can also provide by the method of transcribe
  • the thickness of the adhesive layer is not particularly limited, but is preferably in the range of 2 to 40 ⁇ m, more preferably in the range of 5 to 35 ⁇ m, and still more preferably in the range of 10 to 30 ⁇ m. .
  • the adhesive layer preferably has a storage elastic modulus of 0.10 to 5.0 MPa at 23 to 80 ° C., more preferably 0.15 to 1.0 MPa. It is preferable that the storage elastic modulus at 23 to 80 ° C. is 0.10 MPa or more because white spots due to shrinkage of the optical laminate when the liquid crystal display panel including the optical laminate is exposed to a high temperature can be suppressed. Moreover, since it is hard to produce the fall of durability by the fall of adhesive force as it is 5 Mpa or less, it is preferable.
  • “showing a storage elastic modulus of 0.10 to 5.0 MPa at 23 to 80 ° C.” means that the storage elastic modulus takes a value within the above range at any temperature within this range.
  • the adhesive layer Since the storage elastic modulus usually decreases gradually as the temperature rises, if both the storage elastic modulus at 23 ° C. and 80 ° C. are within the above range, the adhesive layer has a storage elastic modulus within the above range at this temperature range. Can be seen.
  • the storage elastic modulus of the adhesive layer can be measured with a commercially available viscoelasticity measuring device, for example, a viscoelasticity measuring device “DYNAMIC ANALYZER RDA II” manufactured by REOMETRIC.
  • the conductive layer included in the optical layered body of the present invention may be, for example, a conductive transparent metal oxide layer or a metal wiring layer.
  • a conductive layer is, for example, aluminum, copper, silver, iron, tin, zinc, platinum, nickel, molybdenum, chromium, tungsten, lead, titanium, palladium, indium, and an alloy containing two or more of these metals.
  • It may be a layer containing at least one metal element selected from:
  • the conductive layer may be a layer containing at least one metal element selected from aluminum, copper, silver and gold from the viewpoint of conductivity, and from the viewpoint of conductivity and cost, More preferably, it may be a layer containing an aluminum element.
  • blackening treatment may be performed from the viewpoint of preventing light reflection.
  • the blackening treatment is to oxidize the surface of the conductive layer to precipitate Cu 2 O or CuO.
  • the conductive layer may be a layer containing, for example, metallic silver, ITO (tin-doped indium oxide), graphene, zinc oxide, or AZO (aluminum-doped zinc oxide).
  • the conductive layer (conductive layer 4 in FIGS. 1 and 2) is provided, for example, on a substrate (substrate X in FIGS. 1 and 2).
  • a substrate substrate X in FIGS. 1 and 2.
  • Examples of the method for forming the conductive layer on the substrate include a sputtering method.
  • the substrate may be a transparent substrate constituting a liquid crystal cell included in the touch input element, or may be a glass substrate.
  • the transparent substrate may be formed of, for example, polyethylene terephthalate, polycarbonate, polymethyl methacrylate, polyethylene naphthalate, polyether sulfone, cyclic olefin copolymer, triacetyl cellulose, polyvinyl alcohol, polyimide, polystyrene, biaxially stretched polystyrene, or the like.
  • the glass substrate may be formed of, for example, soda lime glass, low alkali glass, non-alkali glass, or the like.
  • the conductive layer may be formed on the entire surface of the substrate or may be formed on a part thereof.
  • the conductive transparent metal oxide layer examples include transparent electrode layers such as ITO (tin-doped indium oxide) and AZO (aluminum-doped zinc oxide).
  • the metal wiring layer examples include a metal mesh that is a thin metal wiring layer, metal nanoparticles, and a layer in which metal nanowires are added in a binder.
  • the metal mesh indicates a two-dimensional network structure formed of metal wiring.
  • the shape of the opening of the metal mesh is not particularly limited, and may be, for example, a polygon (triangle, square, pentagon, hexagon, etc.), circle, ellipse, or indefinite shape. Each opening may be the same or different. In a preferred embodiment, the openings of the metal mesh have the same shape and are square or rectangular.
  • the metal wiring may be arranged with a predetermined interval in the vertical and horizontal directions of the plane on the substrate X.
  • the opening may be filled with a resin (adhesive or the like), or a metal wiring layer may be embedded in the resin (adhesive or the like).
  • the conductive layer (conductive layer 4) is comprised with both metal wiring and resin (adhesive).
  • the line width of the metal wiring (particularly metal mesh) is usually 10 ⁇ m or less, preferably 5 ⁇ m or less, more preferably 3 ⁇ m or less, usually 0.1 ⁇ m or more, preferably 0.5 ⁇ m or more, more preferably 1 ⁇ m or more.
  • the line width of the metal wiring layer may be a combination of these upper and lower limits, and is preferably 0.5 to 5 ⁇ m, more preferably 1 to 3 ⁇ m.
  • the thickness of the conductive layer is not particularly limited, but is usually 10 ⁇ m or less, preferably 3 ⁇ m or less, more preferably 1 ⁇ m or less, particularly preferably 0.5 ⁇ m or less, Usually, it is 0.01 ⁇ m or more, preferably 0.05 ⁇ m or more, more preferably 0.1 ⁇ m or more.
  • the thickness of the conductive layer may be a combination of these upper and lower limits, and is preferably 0.01 to 3 ⁇ m, more preferably 0.05 to 1 ⁇ m.
  • the thickness of the conductive layer is a thickness including the resin.
  • the method for preparing the conductive layer is not particularly limited, and may be lamination of metal foil. Vacuum deposition method, sputtering method, wet coating, ion plating method, ink jet printing method, gravure printing method, electrolytic plating, electroless plating However, it is preferably a conductive layer formed by a sputtering method, an ink jet printing method, or a gravure printing method, and more preferably a conductive layer formed by sputtering.
  • the conductive layer (for example, metal mesh) may have a function of generating a signal when touching a transparent substrate in a touch panel, for example, and transmitting touch coordinates to an integrated circuit or the like.
  • the laminate in which the first cured product layer and the adhesive layer are laminated in this order on one surface of the polarizing film is bonded to a conductive layer formed on a substrate (or Can be obtained).
  • An optical laminate including a conductive layer is useful because it can be used for a touch input type liquid crystal display device having a touch panel function, but a polarizing film.
  • the dichroic dye (iodine) contained in is moved to the conductive layer and the conductive layer is easily corroded.
  • the conductive layer is more easily corroded because the line width is narrow.
  • the optical layered body of the present invention includes the first cured product layer, the movement of the dichroic dye to the conductive layer can be effectively suppressed, and corrosion of the conductive layer can be effectively prevented.
  • the polarizing film constituting the optical laminate of the present invention is a film having a function of extracting linearly polarized light from incident natural light.
  • the polyvinyl alcohol resin film contains a dichroic dye, preferably iodine. It is a film that is adsorbed and oriented.
  • a saponified polyvinyl acetate resin can be used as the polyvinyl alcohol resin constituting the polyvinyl alcohol resin film.
  • Polyvinyl acetate resins include polyvinyl acetate, which is a homopolymer of vinyl acetate, and copolymers of vinyl acetate and other monomers copolymerizable therewith (for example, ethylene-vinyl acetate copolymer). And the like.
  • Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, and acrylamides having an ammonium group.
  • the saponification degree of the polyvinyl alcohol resin is usually 85 to 100 mol%, preferably 98 mol% or more.
  • the polyvinyl alcohol-based resin may be modified.
  • polyvinyl formal modified with aldehydes, polyvinyl acetal, polyvinyl butyral, and the like can be used.
  • the degree of polymerization of the polyvinyl alcohol-based resin is usually 1000 to 10000, and preferably 1500 to 5000.
  • a film obtained by forming such a polyvinyl alcohol-based resin can be used as an original film of a polarizing film.
  • the method for forming a polyvinyl alcohol-based resin is not particularly limited, and can be formed by a conventionally known method.
  • the film thickness of the raw film made of polyvinyl alcohol resin is not particularly limited, but considering easiness of stretching, it is, for example, 10 to 150 ⁇ m, preferably 15 to 100 ⁇ m, more preferably Is 20 to 80 ⁇ m.
  • the polarizing film is usually a step of uniaxially stretching such a polyvinyl alcohol resin film, a step of adsorbing a dichroic dye by dyeing the polyvinyl alcohol resin film with a dichroic dye, and a dichroic dye It is manufactured through a process of treating the adsorbed polyvinyl alcohol-based resin film with a boric acid aqueous solution and a step of washing with water after the treatment with the boric acid aqueous solution.
  • the uniaxial stretching of the polyvinyl alcohol-based resin film may be performed before the dichroic dye is dyed, may be performed simultaneously with the dyeing, or may be performed after the dyeing.
  • the uniaxial stretching may be performed before boric acid treatment or during boric acid treatment. It is also possible to perform uniaxial stretching in these plural stages. In uniaxial stretching, it may be uniaxially stretched between rolls having different peripheral speeds, or may be uniaxially stretched using a hot roll.
  • the uniaxial stretching may be dry stretching in which stretching is performed in the atmosphere, or may be wet stretching in which stretching is performed in a state where a solvent is used and the polyvinyl alcohol-based resin film is swollen.
  • the draw ratio is preferably 8 times or less, more preferably 7.5 times or less, and even more preferably 7 times or less. Moreover, it is preferable that a draw ratio is 4.5 times or more from a viewpoint of expressing the function as a polarizing film.
  • a method of immersing and dyeing a polyvinyl alcohol resin film in an aqueous solution containing iodine and potassium iodide is usually employed.
  • the content of iodine in the aqueous solution is usually 0.01 to 1 part by mass per 100 parts by mass of water, and the content of potassium iodide is usually 0.5 to 20 parts by mass per 100 parts by mass of water.
  • the temperature of the aqueous solution used for dyeing is usually 20 to 40 ° C.
  • the immersion time (dyeing time) in this aqueous solution is usually 20 to 1800 seconds.
  • the boric acid treatment after dyeing with iodine can be performed by immersing the dyed polyvinyl alcohol-based resin film in a boric acid-containing aqueous solution.
  • the amount of boric acid in the boric acid-containing aqueous solution is usually 2 to 15 parts by mass, preferably 5 to 12 parts by mass per 100 parts by mass of water.
  • this boric acid-containing aqueous solution preferably contains potassium iodide.
  • the amount of potassium iodide in the boric acid-containing aqueous solution is usually 0.1 to 15 parts by mass, preferably 5 to 12 parts by mass, per 100 parts by mass of water.
  • the immersion time in the boric acid-containing aqueous solution is usually 60 to 1200 seconds, preferably 150 to 600 seconds, and more preferably 200 to 400 seconds.
  • the temperature of the boric acid-containing aqueous solution is usually 50 ° C. or higher, preferably 50 to 85 ° C., more preferably 60 to 80 ° C.
  • the polyvinyl alcohol resin film after the boric acid treatment is usually washed with water.
  • the water washing treatment can be performed, for example, by immersing a boric acid-treated polyvinyl alcohol resin film in water.
  • the temperature of water in the water washing treatment is usually 5 to 40 ° C., and the immersion time is usually 1 to 120 seconds.
  • a drying process is performed to obtain a polarizing film.
  • the drying treatment can be performed using a hot air dryer or a far infrared heater.
  • the temperature for the drying treatment is usually 30 to 100 ° C., preferably 40 to 95 ° C., more preferably 50 to 90 ° C.
  • the drying treatment time is usually 60 to 600 seconds, preferably 120 to 600 seconds.
  • the polyvinyl alcohol-based resin film is uniaxially stretched, dyed with a dichroic dye, preferably iodine, and treated with boric acid to obtain a polarizing film.
  • the thickness of the polarizing film can be 5 to 40 ⁇ m, for example.
  • the optical laminated body of this invention may be equipped with the 2nd hardened
  • cured material layer can be suitably selected according to adhesiveness with a polarizing film or a 2nd protective film, and is contained in the range of the curable composition which comprises the above-mentioned 1st hardened
  • the composition may be a photocurable adhesive or the like known in the art.
  • the curable composition When using the composition contained in the range of the curable composition which comprises the above-mentioned 1st hardened
  • Examples of the photocurable adhesive known in the art include a mixture of a photocurable epoxy resin and a photocationic polymerization initiator, and a mixture of a photocurable acrylic resin and a photoradical polymerization initiator.
  • a curable composition for forming a cured product constituting the second cured product layer is, for example, a photocurable adhesive containing a photocurable component and a cationic photopolymerization initiator described in International Publication No. 2014/129368. Can be used.
  • the second cured product layer is applied by applying a curable composition constituting the second cured product layer to the surface opposite to the surface on which the first cured product layer of the optical laminate is laminated, and cured. Can be formed.
  • Examples of the coating method of the curable composition constituting the second cured product layer include the same coating method as that of the curable composition (1).
  • the curable composition or the curable adhesive is irradiated by irradiating active energy rays. Is cured.
  • the light source of the active energy ray is not particularly limited, but an active energy ray having a light emission distribution at a wavelength of 400 nm or less is preferable, and specifically, a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a chemical lamp, a black light lamp A microwave excitation mercury lamp, a metal halide lamp and the like are preferable.
  • the light irradiation intensity to the curable composition constituting the second cured product layer can be appropriately selected depending on the composition of the curable composition and is not particularly limited, but the irradiation intensity in the wavelength region effective for activating the polymerization initiator. Is preferably 0.1 to 1000 mW / cm 2 .
  • the light irradiation time to the curable composition constituting the second cured product layer may be appropriately selected depending on the curable composition to be cured, and the integrated light amount expressed as the product of the irradiation intensity and the irradiation time is preferably It is set to be 10 to 5000 mJ / cm 2 .
  • the thickness of the second cured product layer is not particularly limited, but is usually 0.1 to 10 ⁇ m.
  • the optical laminate of the present invention has a first protective film (7 shown in FIG. 2) laminated on one surface of the polarizing film via a first cured product layer.
  • the optical laminate of the present invention is laminated on the other surface of the polarizing film (the surface opposite to the first cured product layer 2) via the second cured product layer. It has a second protective film (6 shown in FIGS. 1 and 2). From the viewpoint of contributing to prevention of shrinkage and expansion of the polarizing film, prevention of deterioration of the polarizing film due to temperature, humidity, ultraviolet rays, and the like, in one embodiment, the optical laminate of the present invention has the first protective film.
  • the optical laminate of the present invention does not include the first protective film. Since the 1st hardened material layer in this invention replaces with a protective film and contributes also to prevention of deterioration of a polarizing film, from a viewpoint of achieving the prevention of deterioration of a polarizing film and thinning of an optical laminated body with sufficient balance, it is optical of this invention. It is preferable that a laminated body does not contain a 1st protective film.
  • polyester polymers such as polyethylene terephthalate and polyethylene naphthalate
  • cellulose polymers such as diacetyl cellulose and triacetyl cellulose
  • acrylic polymers such as polymethyl methacrylate
  • styrene such as polystyrene and acrylonitrile / styrene copolymer (AS resin) Type polymer
  • polycarbonate type polymer such as polycarbonate type polymer.
  • polyethylene, polypropylene, polyolefin having a cyclo or norbornene structure examples include blends of the above polymers.
  • polyolefin polymer such as ethylene / propylene copolymer
  • vinyl chloride polymer amide polymer such as nylon or aromatic polyamide
  • imide polymer sulfone Polymer, polyether sulfone polymer, polyether ether ketone polymer, polyphenylene sulfide polymer, vinyl alcohol polymer, vinylidene chloride polymer, vinyl butyral polymer, arylate polymer, polyoxymethylene polymer, epoxy polymer, or
  • the polymer that forms the protective film examples include blends of the above polymers.
  • the protective film can also be formed as a cured product layer of thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, or silicone. Among them, those having a hydroxyl group having reactivity with an isocyanate crosslinking agent are preferable, and cellulose polymers are particularly preferable.
  • the first protective film and the second protective film may be composed of the same material or may be composed of different materials.
  • the moisture permeability of the second protective film is preferably 1200 g / (m 2 ⁇ 24 hours) or less, more preferably 800 g / (m 2 ⁇ 24 hours) or less at a temperature of 23 ° C. and a relative humidity of 55%. More preferably, it is 600 g / (m 2 ⁇ 24 hours) or less, particularly preferably 400 g / (m 2 ⁇ 24 hours) or less, and most preferably 200 g / (m 2 ⁇ 24 hours) or less.
  • the moisture permeability of the second protective film is equal to or lower than the above value, entry of moisture from the outside under high temperature and high humidity is prevented, and acceleration of movement of the dichroic dye (iodine) contained in the polarizing film is prevented.
  • the optical layered body of the present invention has the first cured product layer, even if the second protective film does not satisfy the above moisture permeability, the movement of the dichroic dye (iodine) contained in the polarizing film is suppressed, It is possible to prevent deterioration of the conductive layer and optical characteristics.
  • the thickness of the protective film is not particularly limited, but both the first protective film and the second protective film are usually 5 to 500 ⁇ m, preferably 1 to 300 ⁇ m, more preferably 5 to 200 ⁇ m, still more preferably 10 to 100 ⁇ m.
  • the protective film may be comprised from the protective film etc. which added the optical compensation function.
  • the first cured product layer can effectively suppress the movement of the dichroic dye from the polarizing film to the adhesive layer and the movement of the ionic compound from the adhesive layer to the polarizing film. Therefore, the selection range about the material of the 1st protective film which comprises an optical laminated body spreads. That is, it is not necessary to use a protective film that hardly transmits an ionic compound, and an optical laminate can be formed using a protective film that is generally inexpensive and easily transmits an ionic compound.
  • the optical layered body of the present invention is advantageous from an industrial point of view, such as reducing the production cost.
  • the first cured product layer is directly laminated on the polarizing film, but the first cured product is provided between the polarizing film and the first cured product layer.
  • a primer layer may be provided between the layer and the pressure-sensitive adhesive layer. Examples of the material for forming the primer layer include various polymers such as urethane oligomers, metal oxide sols, silica sols, and the like.
  • the primer layer is thinner than the protective film, for example, 0.01 to 3 ⁇ m, preferably 0.1 to 2 ⁇ m, more preferably 0.5 to 1 ⁇ m.
  • the optical layered body of the present invention may include a protective film via an adhesive layer between the polarizing film and the first cured product layer.
  • a protective film the protective film similar to the 1st protective film or the 2nd protective film illustrated above is mentioned, for example.
  • the thickness of the protective film is usually 5 to 500 ⁇ m as in the case of the first protective film or the second protective film.
  • the optical layered body of the present invention can effectively prevent the movement of the dichroic dye even if the first cured product layer is not provided with a protective film between the polarizing film and the first cured product layer. For this reason, in the optical laminate of the present invention, the first cured product layer is laminated directly on the polarizing film, or the first cured product layer is laminated on the polarizing film via the primer layer, or the first A mode in which an adhesive layer is laminated on one cured product layer via a primer layer is preferred.
  • the optical layered body of the present invention may further include an optical layer such as a retardation film, a viewing angle compensation film, and a brightness enhancement film, if necessary.
  • an optical layer such as a retardation film, a viewing angle compensation film, and a brightness enhancement film, if necessary.
  • the optical layer can be formed using a material known in the art.
  • the optical laminate of the present invention can be produced by a known method.
  • a curable composition is apply
  • the curable composition (1) is applied on the peelable film to form the first cured composition layer, and the polarizing film side of the laminate on the coated surface Paste.
  • active energy rays such as ultraviolet rays and electron beams are irradiated to cure the second cured composition layer and the first cured composition layer to form the second cured product layer and the first cured product layer.
  • the peelable film is peeled off to form an adhesive layer on the first cured product layer. And what is necessary is just to bond an adhesive layer to the conductive layer laminated
  • the curable composition (1) is applied on the protective film to form a first cured composition layer, and the polarizing film side of the laminate is applied to the coated surface.
  • the first cured composition layer is formed by irradiating active energy rays such as ultraviolet rays and electron beams to form a first cured product layer, and then an adhesive layer is formed on the first protective film. To do. And what is necessary is just to bond an adhesive layer to the conductive layer laminated
  • a laminate composed of a polarizing film and a first cured product layer is obtained by laminating a separate film (peeling film) on one surface of the polarizing film via a first cured product layer, and first curing with active energy rays or the like. It can form by peeling a separate film (peeling film), after hardening a physical layer.
  • the present invention comprises an optical laminate having the above-described configuration, that is, a cured product of a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in a polyvinyl alcohol-based resin.
  • An optical laminate (optical laminate shown in FIGS. 1 and 2 in one embodiment) in which a first cured product layer, an adhesive layer, and a conductive layer are laminated in this order,
  • the polymerizable compound includes an oxetane compound having two or more oxetanyl groups, and the content of the oxetane compound is 40 parts by mass or more with respect to 100 parts by mass of the total amount of all polymerizable compounds contained in the curable composition.
  • An optical laminate is a cured product of a curable composition containing a polymerizable compound on one surface of a polarizing film containing a dichroic dye in a polyvinyl alcohol-based resin.
  • a dense first cured product layer having a high crosslinking density can be formed. Therefore, a first cured product of a dichroic dye (iodine) contained in a polarizing film The movement to the layer can be effectively suppressed, and the corrosion of the conductive layer and the deterioration of the optical performance due to the dichroic dye (iodine) can be effectively prevented.
  • the rate of increase in absorbance of the first cured product layer may or may not be 30% or less.
  • the oxetane compound having two or more oxetanyl groups is the above-mentioned oxetane compound (A), and the components and contents contained in the curable composition forming the cured product of the first cured product layer ( Preferred components and contents are also included).
  • the polarizing film, the adhesive layer, and the conductive layer included in the optical laminate are the same as those described above.
  • cured material layer comprised from the hardened
  • dichroic dye iodine
  • the water contact angle of the first cured product layer is, for example, 90 ° or more, preferably 95 ° or more, more preferably 100 ° or more.
  • the water contact angle is equal to or greater than the above value, the migration of the dichroic dye to the first cured product layer is effectively suppressed even under high temperature and high humidity, and the conductive layer is effectively corroded and the optical performance is reduced. Can be prevented.
  • cured material layer comprised from the hardened
  • the barrier property against dichroic dye (iodine) is high, and the migration of the dichroic dye (iodine) to the first cured product layer is effectively suppressed, and the corrosion of the conductive layer and the optical performance are effectively reduced. Can be prevented.
  • the storage elastic modulus at 30 ° C. of the first cured product layer is, for example, 1500 to 3500 MPa, preferably 1800 to 3500 MPa, more preferably 2000 to 3500 MPa, and further preferably 2500 to 3500 MPa.
  • the elastic modulus is equal to or higher than the lower limit, the movement of the dichroic dye (iodine) to the first cured product layer is more effectively suppressed, and the corrosion of the conductive layer and the deterioration of the optical performance are more effectively prevented. be able to.
  • cured material layer comprised from the hardened
  • the optical laminate in which the adhesive layer and the conductive layer are laminated in this order, and the optical laminate having the glass transition temperature of the first cured product layer of 90 ° C. or higher is due to the relatively high crosslinking density.
  • the barrier property against the dichroic dye (iodine) is high, and the migration of the dichroic dye (iodine) to the first cured product layer is effectively suppressed, and the corrosion of the conductive layer and the optical performance are effectively reduced. Can be prevented.
  • the glass transition temperature of the first cured product layer is, for example, 90 to 180 ° C., preferably 100 to 180 ° C., more preferably 120 to 180 ° C., and further preferably 150 to 180 ° C.
  • the elastic modulus is equal to or higher than the lower limit, the movement of the dichroic dye (iodine) to the first cured product layer is more effectively suppressed, and the corrosion of the conductive layer and the deterioration of the optical performance are more effectively prevented. be able to.
  • Example 1 Preparation of curable composition (I) constituting first cured product layer According to the composition shown in Table 1 below, each component was mixed to prepare curable compositions (I) of Production Examples 1 to 31.
  • the integrated light quantity from 280 nm to 320 nm is 1000 mJ / cm 2 using an ultraviolet irradiation device with a belt conveyor (the lamp uses “D bulb” manufactured by Fusion UV Systems).
  • the cycloolefin film on both sides of the obtained laminate was peeled off, and the cured product (first cured product layer) of the curable composition (I) was isolated and used as an evaluation sample.
  • the absorbance at 360 nm was measured for the evaluation sample using an ultraviolet-visible spectrophotometer (manufactured by Shimadzu Corporation, “UV2450”). This absorbance is defined as absorbance before immersion.
  • UV2450 ultraviolet-visible spectrophotometer
  • the absorbance at 360 nm was measured using an ultraviolet-visible spectrophotometer (“UV2450” manufactured by Shimadzu Corporation). This absorbance is defined as absorbance after immersion.
  • UV2450 ultraviolet-visible spectrophotometer
  • a polarizing film (1) having a thickness of 7 ⁇ m in which iodine was adsorbed and oriented on a polyvinyl alcohol film was obtained.
  • Laminate (1) A triacetyl cellulose film coated with a water-based adhesive (1) on one surface of a polarizing film (1) and hard-coated on the surface (manufactured by Toppan TOMOEGAWA optical film, “ 25KCHC-TC "(trade name), thickness 32 ⁇ m), the surface not subjected to the hard coat treatment was bonded to the polarizing film via the aqueous adhesive (1). This was dried at 60 ° C. for 6 minutes to produce a laminate (1) having a protective film on one side.
  • Laminate (2) A curable composition (I) was cured on one side of a cycloolefin film [trade name “ZEONOR” manufactured by Nippon Zeon Co., Ltd.] having a thickness of 50 ⁇ m using a bar coater. Coating was performed so that the film thickness was about 3 ⁇ m.
  • the polarizing film side of the laminate (1) was bonded to the coated surface to produce a laminate. From the cycloolefin film side of the laminate, an integrated light quantity of 280 nm to 320 nm is 200 mJ / cm 2 using an ultraviolet irradiation device with a belt conveyor (the lamp uses “D bulb” manufactured by Fusion UV Systems).
  • Laminate (3) An organic solvent solution of an acrylic pressure-sensitive adhesive was prepared, and the organic solvent solution of the acrylic pressure-sensitive adhesive was subjected to a release treatment to a polyethylene terephthalate film with a thickness of 38 ⁇ m [manufactured by Lintec Corporation] , “SP-PLR382020” (trade name), referred to as release film], coated with a die coater so that the thickness after drying is 20 ⁇ m, and dried to form a sheet with release film An adhesive was prepared.
  • the temperature was 23 ° C., relative It was cured for 7 days under the condition of humidity 65% to obtain a laminate (3) provided with an adhesive layer.
  • This laminate has a configuration in which a release film is bonded onto an adhesive layer.
  • ⁇ Base polymer Copolymer of butyl acrylate, methyl acrylate, acrylic acid and hydroxyethyl acrylate
  • ⁇ isocyanate-based crosslinking agent Ethyl acetate solution of trimethylolpropane adduct of tolylene diisocyanate (solid content concentration 75%) ("Coronate L” (trade name), manufactured by Tosoh Corporation)
  • ⁇ Silane coupling agent> 3-Glycidoxypropyltrimethoxysilane, liquid (“KBM-403" (trade name), manufactured by Shin-Etsu Chemical Co., Ltd.)
  • Antistatic agent 1-hexylpyridinium hexafluorophosphate, a compound represented by the following formula (III).
  • ITO film was formed on one surface of an alkali-free glass by a sputtering method to produce a glass having an ITO film.
  • the glass having this ITO thin film was cut into 25 mm ⁇ 25 mm, and the central part on the ITO thin film was measured using a low resistivity meter (“Loresta AX MCP-T370”, manufactured by Mitsubishi Chemical Analytech). Initial resistance value ”.
  • the sample for evaluation was put into an environment of 80 ° C. and a relative humidity of 90% for 72 hours and then taken out, and the laminate (3) was peeled off.
  • the ITO thin film was washed with tanol, and the value measured using the same device as above was defined as “resistance value after durability”.
  • Resistance value increase rate is 20% or less ⁇ : Resistance value increase rate exceeds 20% and less than 30% ⁇ : Resistance value increase rate is 30% or more
  • the pressure-sensitive adhesive layer side of the laminated body (3) was made of alkali-free glass [manufactured by Corning, “EAGLE XG "].
  • the sample was autoclaved for 1 hour at a temperature of 50 ° C. and a pressure of 5 kg / cm 2 (490.3 kPa), and then left for 24 hours in an environment of a temperature of 23 ° C. and a relative humidity of 55%.
  • an optional accessory “film holder with polarizing film” is set in an ultraviolet-visible spectrophotometer (manufactured by Shimadzu Corporation, “UV2450”), and the transmission axis direction and absorption of the laminate in the wavelength range of 380 to 700 nm are set.
  • Examples 2 to 22 and Comparative Examples 1 to 9 A first cured product layer and a laminate (3) were obtained in the same manner as in Example 1 using the curable compositions (I) of Production Examples 2 to 31. Using the obtained laminate (3), the ITO resistance value increase rate and the polarization degree change ⁇ Py were calculated in the same manner as in Example 1. These results are shown in Table 2.
  • the optical layered body in which the absorbance increase rate of the first cured product layer is 30% or less does not corrode ITO even if it is placed under high temperature and high humidity for a long time. It shows that it can suppress effectively.
  • Examples 4 to 20 and Example 22 show that the optical laminate in which the absorbance increase rate of the first cured product layer is 20% or less can more effectively suppress the corrosion of ITO.
  • Examples 1 to 22 show that optical laminates having an absorbance increase rate of 30% or less are excellent in durability and can maintain optical performance even under high temperature and high humidity.
  • Examples 1 to 22 include 40 parts by mass or more of an oxetane compound in which the first cured product layer has two or more oxetanyl groups with respect to a total amount of 100 parts by mass of all polymerizable compounds. It shows that the optical laminated body which is a hardened

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Abstract

Le problème décrit par la présente invention est de fournir un stratifié optique qui est susceptible d'empêcher la détérioration d'une couche conductrice par suppression efficace de la migration d'un colorant dichroïque qui est contenu dans un film polarisant sur la couche conductrice. La solution selon l'invention porte sur un stratifié optique qui est obtenu par stratification séquentielle, sur une surface d'un film polarisant qui contient un colorant dichroïque dans une résine d'alcool polyvinylique, une première couche de produit durci qui est configurée à partir d'un produit durci d'une composition durcissable contenant un composé polymérisable, une couche adhésive et une couche conductrice dans cet ordre, et le taux d'augmentation d'absorbance de la première couche de produit durci tel qu'exprimé par la formule (1) étant de 30 % ou moins. Taux d'augmentation d'absorbance (%) = (Abs. après immersion (360 nm)- Abs. avant immersion (360 nm))/Abs. avant immersion (360 nm) × 100 (1)
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JP2021018416A (ja) * 2019-07-17 2021-02-15 住友化学株式会社 粘着剤層付偏光板
JP7628396B2 (ja) 2019-07-17 2025-02-10 住友化学株式会社 粘着剤層付偏光板の製造方法
US12249260B2 (en) 2020-09-29 2025-03-11 Boe Technology Group Co., Ltd. Flexible polarizer and flexible touch display device
WO2023112700A1 (fr) * 2021-12-16 2023-06-22 日東電工株式会社 Stratifié de capteur
JP2023089701A (ja) * 2021-12-16 2023-06-28 日東電工株式会社 センサー積層体

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TWI890529B (zh) 2025-07-11
CN110325887B (zh) 2021-11-26
KR102484820B1 (ko) 2023-01-05
TW201841758A (zh) 2018-12-01
JP2018141962A (ja) 2018-09-13
CN113917590A (zh) 2022-01-11
CN113917590B (zh) 2025-11-11
JP7485748B2 (ja) 2024-05-16
JP2023024446A (ja) 2023-02-16
TWI852905B (zh) 2024-08-21
KR20190125990A (ko) 2019-11-07
JP2024003102A (ja) 2024-01-11
CN110325887A (zh) 2019-10-11
JP7408272B2 (ja) 2024-01-05

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