WO2017216913A1 - 紫外線硬化型アクリル系粘着剤組成物、紫外線硬化型アクリル系粘着剤層、粘着剤層付き偏光フィルム、紫外線硬化型アクリル系粘着剤層の製造方法、及び画像表示装置 - Google Patents

紫外線硬化型アクリル系粘着剤組成物、紫外線硬化型アクリル系粘着剤層、粘着剤層付き偏光フィルム、紫外線硬化型アクリル系粘着剤層の製造方法、及び画像表示装置 Download PDF

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Publication number
WO2017216913A1
WO2017216913A1 PCT/JP2016/067829 JP2016067829W WO2017216913A1 WO 2017216913 A1 WO2017216913 A1 WO 2017216913A1 JP 2016067829 W JP2016067829 W JP 2016067829W WO 2017216913 A1 WO2017216913 A1 WO 2017216913A1
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Prior art keywords
sensitive adhesive
ultraviolet
curable acrylic
adhesive layer
pressure
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Application number
PCT/JP2016/067829
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English (en)
French (fr)
Japanese (ja)
Inventor
山本　真也
普史 形見
淳 保井
Original Assignee
日東電工株式会社
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Application filed by 日東電工株式会社 filed Critical 日東電工株式会社
Priority to KR1020217005364A priority Critical patent/KR102311394B1/ko
Priority to CN202110900829.7A priority patent/CN113773757B/zh
Priority to KR1020187033577A priority patent/KR102222057B1/ko
Priority to SG11201811117YA priority patent/SG11201811117YA/en
Priority to KR1020217031730A priority patent/KR102386015B1/ko
Priority to CN202210634695.3A priority patent/CN115058200A/zh
Priority to CN201680086252.8A priority patent/CN109348720A/zh
Priority to CN202210633527.2A priority patent/CN115109526B/zh
Priority to PCT/JP2016/067829 priority patent/WO2017216913A1/ja
Publication of WO2017216913A1 publication Critical patent/WO2017216913A1/ja

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    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
    • G06F21/55—Detecting local intrusion or implementing counter-measures
    • G06F21/552—Detecting local intrusion or implementing counter-measures involving long-term monitoring or reporting
    • 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
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • 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
    • C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
    • 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
    • C09J7/10—Adhesives in the form of films or foils without carriers
    • 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
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • 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
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/50—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems
    • G06F21/52—Monitoring users, programs or devices to maintain the integrity of platforms, e.g. of processors, firmware or operating systems during program execution, e.g. stack integrity ; Preventing unwanted data erasure; Buffer overflow
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/60—Protecting data
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/30—Arrangements for executing machine instructions, e.g. instruction decode
    • G06F9/38—Concurrent instruction execution, e.g. pipeline or look ahead
    • G06F9/3854—Instruction completion, e.g. retiring, committing or graduating
    • G06F9/3858—Result writeback, i.e. updating the architectural state or memory
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • 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
    • 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
    • C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
    • C09J2301/416—Additional features of adhesives in the form of films or foils characterized by the presence of essential components use of irradiation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/03—Indexing scheme relating to G06F21/50, monitoring users, programs or devices to maintain the integrity of platforms
    • G06F2221/034—Test or assess a computer or a system

Definitions

  • the present invention relates to an ultraviolet curable acrylic pressure-sensitive adhesive composition for forming a pressure-sensitive adhesive layer located between a cover glass or a cover plastic and a polarizing film in an image display device.
  • the present invention also includes an ultraviolet curable acrylic pressure-sensitive adhesive layer formed from the ultraviolet curable acrylic pressure-sensitive adhesive composition, a polarizing film with a pressure-sensitive adhesive layer having the ultraviolet curable acrylic pressure-sensitive adhesive layer, and the ultraviolet curable type.
  • the present invention relates to a method for producing an acrylic pressure-sensitive adhesive layer and an image display device. Examples of the image display device include a liquid crystal display device, an organic EL (electroluminescence) display device, a PDP (plasma display panel), and electronic paper.
  • liquid crystal display devices and organic EL display devices for example, in liquid crystal display devices, it is indispensable to dispose polarizing elements on both sides of the liquid crystal cell, and generally a polarizing film is attached. Has been.
  • various optical elements have been used for display panels such as liquid crystal panels and organic EL panels in order to improve the display quality of displays.
  • the polarizing film used in these image display devices generally has a configuration in which a polarizer is sandwiched between two protective films, and triacetyl cellulose (TAC) is widely used as the protective film.
  • TAC triacetyl cellulose
  • a double-sided pressure-sensitive adhesive sheet for integrating two members disposed between the surface protection panel in the image display device and the viewing side of the liquid crystal module Transparent double-sided pressure-sensitive adhesive for image display devices, having at least one ultraviolet absorbing layer, having a light transmittance of 380 nm or less and a visible light transmittance of 80% or more on a longer wavelength side than the wavelength of 430 nm
  • a sheet for example, see Patent Document 1
  • a pressure-sensitive adhesive sheet containing an acrylic polymer and a triazine ultraviolet absorber for example, see Patent Document 2.
  • an ultraviolet absorbing ability can be imparted to the pressure-sensitive adhesive layer in a pressure-sensitive adhesive optical film in which a pressure-sensitive adhesive layer is provided on one or both sides of the optical film (see, for example, Patent Document 3).
  • Patent Document 3 does not specifically discuss the formation of a pressure-sensitive adhesive layer having an ultraviolet absorption function using a polymerization method by ultraviolet irradiation, and photopolymerization having an absorption band at a wavelength of 400 nm or more. Initiators have not been fully studied.
  • Patent Documents 1 to 3 various transparent adhesives having an ultraviolet absorbing function are known, but currently known transparent adhesives having an ultraviolet absorbing function are obtained by subjecting a base polymer of the adhesive to solution polymerization. Most of the products manufactured by In such a production method, it is difficult to produce a thick product having a thickness of 150 ⁇ m or more, and there is a limit to the thickness of the pressure-sensitive adhesive layer that can be produced. It is known that a thick adhesive layer can be formed when a polymerization method by ultraviolet irradiation is used, but for a method of forming an adhesive layer having an ultraviolet absorption function by a polymerization method by ultraviolet irradiation. The current situation is not known.
  • an object of the present invention is to provide an ultraviolet curable acrylic pressure-sensitive adhesive composition capable of forming a pressure-sensitive adhesive layer having an ultraviolet absorption function by a polymerization method using ultraviolet irradiation. Further, the present invention provides an ultraviolet curable acrylic pressure-sensitive adhesive layer formed from the ultraviolet curable acrylic pressure-sensitive adhesive composition, a polarizing film with an adhesive layer having the ultraviolet curable acrylic pressure-sensitive adhesive layer, and the ultraviolet curable It is another object of the present invention to provide a method for producing an acrylic pressure-sensitive adhesive layer and an image display device.
  • the present invention is an ultraviolet curable acrylic pressure-sensitive adhesive composition for forming a pressure-sensitive adhesive layer located between a cover glass or a cover plastic and a polarizing film in an image display device
  • the pressure-sensitive adhesive composition includes a monomer component containing an alkyl (meth) acrylate and / or a partial polymer of the monomer component, an ultraviolet absorber, and a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more.
  • the UV-curable acrylic pressure-sensitive adhesive composition wherein the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition has a transmittance of 40% or less at a wavelength of 380 nm and a transmittance of 30% or more at a wavelength of 400 nm. About.
  • the transmission b * value of the pressure-sensitive adhesive layer is 3.0 or less.
  • the ultraviolet absorber is at least selected from the group consisting of a triazine-based ultraviolet absorber having 2 or less hydroxyl groups in one molecule and a benzotriazole-based ultraviolet absorber having one benzotriazole skeleton in one molecule.
  • One kind of ultraviolet absorber is preferable.
  • the addition amount of the photopolymerization initiator (A) is smaller than the addition amount of the ultraviolet absorber.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention preferably further contains a photopolymerization initiator (B) having an absorption band at a wavelength of less than 400 nm.
  • the present invention is an adhesive layer positioned between a cover glass or a cover plastic and a polarizing film in an image display device,
  • the ultraviolet curable acrylic pressure-sensitive adhesive is formed by irradiating the ultraviolet curable acrylic pressure-sensitive adhesive composition with ultraviolet rays to photopolymerize a monomer component in the ultraviolet curable acrylic pressure-sensitive adhesive composition.
  • the agent layer is formed by irradiating the ultraviolet curable acrylic pressure-sensitive adhesive composition with ultraviolet rays to photopolymerize a monomer component in the ultraviolet curable acrylic pressure-sensitive adhesive composition.
  • the present invention relates to a polarizing film and a polarizing film with a pressure-sensitive adhesive layer, characterized by having the ultraviolet curable acrylic pressure-sensitive adhesive layer on at least one surface of the polarizing film.
  • the present invention is a method for producing a pressure-sensitive adhesive layer formed from an ultraviolet curable acrylic pressure-sensitive adhesive composition containing the photopolymerization initiator (B), Irradiating a composition containing a monomer component containing an alkyl (meth) acrylate and the photopolymerization initiator (B) with ultraviolet rays to form a partial polymer of the monomer component; A step of adding an ultraviolet absorber and a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more to the partially polymerized monomer component to prepare an ultraviolet curable acrylic pressure-sensitive adhesive composition; An ultraviolet curable acrylic pressure-sensitive adhesive comprising a step of applying the ultraviolet curable acrylic pressure-sensitive adhesive composition to at least one surface of a substrate and irradiating the ultraviolet curable acrylic pressure-sensitive adhesive composition with ultraviolet rays.
  • the present invention relates to a method for producing an agent layer.
  • the present invention is an image display device having at least a cover glass or a cover plastic and a polarizing film
  • the present invention relates to an image display device comprising the ultraviolet curable acrylic pressure-sensitive adhesive layer between the cover glass or cover plastic and a polarizing film.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention can form a pressure-sensitive adhesive layer having an ultraviolet absorption function by a polymerization method by ultraviolet irradiation, so that a thick pressure-sensitive adhesive layer of 150 ⁇ m or more can be formed. A wide-thickness pressure-sensitive adhesive layer can be formed. Since the pressure-sensitive adhesive layer of the present invention has an excellent ultraviolet absorption function, the deterioration of optical members such as liquid crystal panels, organic EL elements, polarizers and the like is suppressed by using the pressure-sensitive adhesive layer in an image display device. be able to.
  • the ultraviolet-curable acrylic pressure-sensitive adhesive composition of the present invention is an ultraviolet ray for forming a pressure-sensitive adhesive layer located between a cover glass or a cover plastic and a polarizing film in an image display device.
  • a curable acrylic pressure-sensitive adhesive composition includes a monomer component containing an alkyl (meth) acrylate and / or a partial polymer of the monomer component, an ultraviolet absorber, and a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more.
  • the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition has a transmittance at a wavelength of 380 nm of 40% or less and a transmittance at a wavelength of 400 nm of 30% or more.
  • a retardation film or the like can be appropriately added.
  • the adhesive film is adhered between the polarizing film 5 and a liquid crystal display device (LCD) or an organic EL display device (OLED) 6. It can laminate
  • an adhesive layer and / or an adhesive layer can be used suitably.
  • the polarizing film 5 in FIGS. 1 to 3 has a configuration in which the polarizer 4 is sandwiched between two protective films 3a and 3b, but one side protection in which one side of the polarizer 4 is protected by a protective film. A polarizing film may be sufficient.
  • the pressure-sensitive adhesive layer comprising the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention is closer to the viewing side than the cover glass or cover plastic 1 in the image display device and the liquid crystal display device (LCD) or organic EL display device (OLED) 6.
  • the pressure-sensitive adhesive layer is located between the polarizing film 5 and the pressure-sensitive adhesive layer 2a to 2c in FIGS. 1 to 3, and the pressure-sensitive adhesive layer in contact with the polarizing film 5 (in the drawing) It is more preferable to use the pressure-sensitive adhesive layer of the present invention in 2a) from the viewpoint of ultraviolet absorbing ability.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention comprises a monomer component containing an alkyl (meth) acrylate and / or a partial polymer of the monomer component, an ultraviolet absorber, and a photopolymerization having an absorption band at a wavelength of 400 nm or more. It contains an initiator (A).
  • alkyl (meth) acrylate examples include those having a linear or branched alkyl group having 1 to 24 carbon atoms at the ester end.
  • Alkyl (meth) acrylate can be used individually by 1 type or in combination of 2 or more types.
  • Alkyl (meth) acrylate refers to alkyl acrylate and / or alkyl methacrylate, and (meth) in the present invention has the same meaning.
  • alkyl (meth) acrylate examples include an alkyl (meth) acrylate having an alkyl group having a branch having 4 to 9 carbon atoms at the ester terminal.
  • the alkyl (meth) acrylate is preferable in terms of easily balancing the adhesive properties.
  • the alkyl (meth) acrylate having an alkyl group having 1 to 24 carbon atoms at the ester terminal is 40% by weight or more based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer. It is preferably 50% by weight or more, more preferably 60% by weight or more.
  • the monomer component that forms the (meth) acrylic polymer may contain a copolymerization monomer other than the alkyl (meth) acrylate as a monofunctional monomer component.
  • a copolymerization monomer can be used as the remainder of the said alkyl (meth) acrylate in a monomer component.
  • a cyclic nitrogen-containing monomer can be included.
  • a polymerizable functional group which has unsaturated double bonds such as a (meth) acryloyl group or a vinyl group
  • has a cyclic nitrogen structure can be especially used without a restriction
  • the cyclic nitrogen structure preferably has a nitrogen atom in the cyclic structure.
  • cyclic nitrogen-containing monomers examples include lactam vinyl monomers such as N-vinyl pyrrolidone, N-vinyl- ⁇ -caprolactam, and methyl vinyl pyrrolidone; vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl piperazine, vinyl pyrazine, vinyl pyrrole, vinyl Examples thereof include vinyl monomers having a nitrogen-containing heterocyclic ring such as imidazole, vinyl oxazole and vinyl morpholine. Moreover, the (meth) acryl monomer containing heterocyclic rings, such as a morpholine ring, a piperidine ring, a pyrrolidine ring, a piperazine ring, is mentioned.
  • N-acryloylmorpholine N-acryloylpiperidine, N-methacryloylpiperidine, N-acryloylpyrrolidine and the like.
  • lactam vinyl monomers are preferable.
  • the cyclic nitrogen-containing monomer is preferably 0.5 to 50% by weight, and preferably 0.5 to 40% by weight, based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer. Is more preferable, and 0.5 to 30% by weight is even more preferable.
  • the monomer component used in the present invention can contain a hydroxyl group-containing monomer as a monofunctional monomer component.
  • a hydroxyl group-containing monomer a monomer having a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group and having a hydroxyl group can be used without particular limitation.
  • hydroxyl group-containing monomer examples include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl ( Hydroxyalkyl (meth) acrylates such as (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate; -Hydroxyalkylcycloalkane (meth) acrylates such as -hydroxymethylcyclohexyl) methyl (meth) acrylate.
  • hydroxyethyl (meth) acrylamide examples include hydroxyethyl (meth) acrylamide, allyl alcohol, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, diethylene glycol monovinyl ether, and the like. These can be used alone or in combination. Of these, hydroxyalkyl (meth) acrylate is preferred.
  • the hydroxyl group-containing monomer is preferably 1% by weight or more from the viewpoint of enhancing adhesive force and cohesive force with respect to the total amount of the monofunctional monomer component forming the (meth) acrylic polymer, It is more preferably 2% by weight or more, and further preferably 3% by weight or more.
  • the amount of the hydroxyl group-containing monomer is too large, the pressure-sensitive adhesive layer becomes hard and the adhesive strength may decrease, and the viscosity of the pressure-sensitive adhesive may become too high or gel.
  • the hydroxyl group-containing monomer is preferably 30% by weight or less, more preferably 27% by weight or less, and more preferably 25% by weight or less based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer. Is more preferable.
  • the monomer component forming the (meth) acrylic polymer can contain other functional group-containing monomers as monofunctional monomers.
  • a monomer having a carboxyl group-containing monomer or a cyclic ether group can be mentioned.
  • the carboxyl group-containing monomer a monomer having a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group and having a carboxyl group can be used without particular limitation.
  • the carboxyl group-containing monomer include (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, and isocrotonic acid. Can be used alone or in combination. These anhydrides can be used for itaconic acid and maleic acid. Among these, acrylic acid and methacrylic acid are preferable, and acrylic acid is particularly preferable.
  • a carboxyl group-containing monomer can be arbitrarily used for the monomer component used for manufacture of a (meth) acrylic-type polymer, On the other hand, it is not necessary to use a carboxyl group-containing monomer.
  • a monomer having a cyclic ether group a monomer having a polymerizable functional group having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group and a cyclic ether group such as an epoxy group or an oxetane group.
  • the epoxy group-containing monomer include glycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate glycidyl ether, and the like.
  • Examples of the oxetane group-containing monomer include 3-oxetanylmethyl (meth) acrylate, 3-methyl-oxetanylmethyl (meth) acrylate, 3-ethyl-oxetanylmethyl (meth) acrylate, and 3-butyl-oxetanylmethyl (meth) acrylate. , 3-hexyl-oxetanylmethyl (meth) acrylate, and the like. These can be used alone or in combination.
  • the carboxyl group-containing monomer and the monomer having a cyclic ether group are preferably 30% by weight or less based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer, and 27% by weight. % Or less is more preferable, and 25% by weight or less is more preferable.
  • the monomer component forming the (meth) acrylic polymer may be, for example, CH 2 ⁇ C (R 1 ) COOR 2 (wherein R 1 is hydrogen or a methyl group, R 2 has 1 to 3 substituted alkyl groups and cyclic cycloalkyl groups.) Alkyl (meth) acrylates.
  • the substituent of the substituted alkyl group having 1 to 3 carbon atoms as R 2 is preferably an aryl group having 3 to 8 carbon atoms or an aryloxy group having 3 to 8 carbon atoms.
  • the aryl group is not limited, but is preferably a phenyl group.
  • Examples of such a monomer represented by CH 2 ⁇ C (R 1 ) COOR 2 include phenoxyethyl (meth) acrylate, benzyl (meth) acrylate, cyclohexyl (meth) acrylate, 3,3,5-trimethylcyclohexyl. (Meth) acrylate, isobornyl (meth) acrylate, etc. are mentioned. These can be used alone or in combination.
  • the (meth) acrylate represented by CH 2 ⁇ C (R 1 ) COOR 2 is 50% by weight or less based on the total amount of the monofunctional monomer component forming the (meth) acrylic polymer. 45% by weight or less is preferable, 40% by weight or less is more preferable, and 35% by weight or less is more preferable.
  • copolymerization monomers include vinyl acetate, vinyl propionate, styrene, ⁇ -methylstyrene; (meth) acrylic acid polyethylene glycol, (meth) acrylic acid polypropylene glycol, (meth) acrylic acid methoxyethylene glycol, (meth) Glycol acrylic ester monomers such as methoxypolypropylene glycol acrylate; Acrylic ester monomers such as tetrahydrofurfuryl (meth) acrylate, fluorine (meth) acrylate, silicone (meth) acrylate and 2-methoxyethyl acrylate; Monomers, amino group-containing monomers, imide group-containing monomers, N-acryloylmorpholine, vinyl ether monomers and the like can also be used. Moreover, as a copolymerization monomer, the monomer which has cyclic structures, such as terpene (meth) acrylate and dicyclopentanyl (meth) acrylate, can be used.
  • silane monomers containing silicon atoms examples include silane monomers containing silicon atoms.
  • examples of the silane monomer include 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, and 8-vinyloctyltrimethoxysilane.
  • the monomer component forming the (meth) acrylic polymer may contain a polyfunctional monomer as necessary in order to adjust the cohesive strength of the pressure-sensitive adhesive in addition to the monofunctional monomer exemplified above. it can.
  • the polyfunctional monomer is a monomer having at least two polymerizable functional groups having an unsaturated double bond such as a (meth) acryloyl group or a vinyl group, such as (poly) ethylene glycol di (meth) acrylate, (Poly) propylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,2-ethylene Glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,12-dodecanediol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, tetramethylol methanetri (meth) acrylate Ester compounds of poly
  • trimethylolpropane tri (meth) acrylate, hexanediol di (meth) acrylate, and dipentaerythritol hexa (meth) acrylate can be preferably used.
  • a polyfunctional monomer can be used individually by 1 type or in combination of 2 or more types.
  • the amount of the polyfunctional monomer used varies depending on the molecular weight, the number of functional groups, etc., but it is preferably used at 3 parts by weight or less, more preferably 2 parts by weight or less, with respect to a total of 100 parts by weight of the monofunctional monomer. 1 part by weight or less is more preferable. Moreover, it does not specifically limit as a lower limit, However It is preferable that it is 0 weight part or more, and it is more preferable that it is 0.001 weight part or more. Adhesive force can be improved when the usage-amount of a polyfunctional monomer exists in the said range.
  • a partial polymer of the monomer component may be used.
  • the “partially polymerized product” here is a product obtained by partially polymerizing monomer components.
  • the polymerization rate of the partially polymerized monomer component is as described later.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention contains an ultraviolet absorber.
  • an ultraviolet absorber For example, a triazine type ultraviolet absorber, a benzotriazole type ultraviolet absorber, a benzophenone type ultraviolet absorber, an oxybenzophenone type ultraviolet absorber, a salicylic acid ester type ultraviolet absorber, a cyanoacrylate type ultraviolet ray An absorbent etc. can be mentioned, These can be used individually by 1 type or in combination of 2 or more types. Among these, triazine-based UV absorbers and benzotriazole-based UV absorbers are preferable, triazine-based UV absorbers having 2 or less hydroxyl groups in one molecule, and benzones having one benzotriazole skeleton in one molecule.
  • At least one ultraviolet absorber selected from the group consisting of triazole-based ultraviolet absorbers has good solubility in the monomer used for forming the ultraviolet curable acrylic pressure-sensitive adhesive composition, and This is particularly preferable because of its high ultraviolet absorption capability near a wavelength of 380 nm.
  • triazine ultraviolet absorbers having 2 or less hydroxyl groups in one molecule include 2,4-bis-[ ⁇ 4- (4-ethylhexyloxy) -4-hydroxy ⁇ -phenyl] -6. -(4-Methoxyphenyl) -1,3,5-triazine (Tinosorb S, manufactured by BASF), 2,4-bis [2-hydroxy-4-butoxyphenyl] -6- (2,4-dibutoxyphenyl) -1,3,5-triazine (TINUVIN 460, manufactured by BASF), 2- (4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hydroxyphenyl And [(C10-C16 (mainly C12-C13) alkyloxy) methyl] oxirane reaction product (TINUVIN400, manufactured by BASF), 2- [4,6-bis (2 , 4-Dimethylphenyl) -1,3,5-triazin-2-yl]
  • benzophenone ultraviolet absorber (benzophenone compound) and oxybenzophenone ultraviolet absorber (oxybenzophenone compound)
  • examples of the benzophenone ultraviolet absorber (benzophenone compound) and oxybenzophenone ultraviolet absorber (oxybenzophenone compound) include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, and 2-hydroxy.
  • -4-methoxybenzophenone-5-sulfonic acid anhydrous and trihydrate
  • 2-hydroxy-4-octyloxybenzophenone 4-dodecyloxy-2-hydroxybenzophenone
  • 4-benzyloxy-2-hydroxybenzophenone 2, 2 ′, 4,4′-tetrahydroxybenzophenone, 2,2′-dihydroxy-4,4-dimethoxybenzophenone and the like can be mentioned.
  • salicylic acid ester ultraviolet absorber examples include, for example, phenyl-2-acryloyloxybenzoate, phenyl-2-acryloyloxy-3-methylbenzoate, phenyl-2-acryloyl.
  • Oxy-4-methylbenzoate phenyl-2-acryloyloxy-5-methylbenzoate, phenyl-2-acryloyloxy-3-methoxybenzoate, phenyl-2-hydroxybenzoate, phenyl-2- Hydroxy-3-methylbenzoate, phenyl-2-hydroxy-4 methylbenzoate, phenyl-2-hydroxy-5-methylbenzoate, phenyl 2-hydroxy-3-methoxybenzoate, 2,4-di- tert-Butylphenyl-3,5-di-tert Butyl-4-hydroxybenzoate (TINUVIN120, manufactured by BASF), and the like.
  • cyanoacrylate ultraviolet absorber examples include alkyl-2-cyanoacrylate, cycloalkyl-2-cyanoacrylate, alkoxyalkyl-2-cyanoacrylate, alkenyl-2-cyanoacrylate, alkynyl- Examples include 2-cyanoacrylate.
  • the ultraviolet absorber may be used alone or in combination of two or more, but the total content is a monofunctional monomer component that forms a (meth) acrylic polymer.
  • the amount is preferably about 0.1 to 5 parts by weight, more preferably about 0.5 to 3 parts by weight with respect to 100 parts by weight. It is preferable to set the addition amount of the ultraviolet absorber within the above range since the ultraviolet absorption function of the pressure-sensitive adhesive layer can be sufficiently exhibited and the ultraviolet polymerization is not hindered.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention contains a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more.
  • the photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more may be any one having an absorption band at a wavelength of 400 nm or more, and may have an absorption band at a wavelength of less than 400 nm.
  • the ultraviolet light absorber was included in the pressure-sensitive adhesive composition, the ultraviolet light was absorbed by the ultraviolet light absorber and was not sufficiently polymerized.
  • the pressure-sensitive adhesive composition of the present invention has a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more, it can be sufficiently polymerized even though it contains an ultraviolet absorber.
  • photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide (Irgacure 819, manufactured by BASF), 2,4,6-trimethylbenzoyl- And diphenyl-phosphine oxide (LUCIRIN TPO, manufactured by BASF).
  • the photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more may be used alone or in combination of two or more.
  • the addition amount of the photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more is not particularly limited, but is preferably smaller than the addition amount of the ultraviolet absorber.
  • the amount is preferably about 0.005 to 1 part by weight, more preferably about 0.02 to 0.5 part by weight with respect to 100 parts by weight of the monofunctional monomer component forming the polymer. It is preferable that the amount of the photopolymerization initiator (A) added is in the above range because ultraviolet polymerization can sufficiently proceed.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention can contain a photopolymerization initiator (B) having an absorption band at a wavelength of less than 400 nm. Moreover, it is preferable that a photoinitiator (B) does not have an absorption band in wavelength 400nm or more.
  • the photopolymerization initiator (B) is not particularly limited as long as it generates radicals by ultraviolet rays and starts photopolymerization and has an absorption band at a wavelength of less than 400 nm. Any initiator can be suitably used.
  • benzoin ether photopolymerization initiator acetophenone photopolymerization initiator, ⁇ -ketol photopolymerization initiator, photoactive oxime photopolymerization initiator, benzoin photopolymerization initiator, benzyl photopolymerization initiator, benzophenone A photopolymerization initiator, a ketal photopolymerization initiator, a thioxanthone photopolymerization initiator, an acylphosphine oxide photopolymerization initiator, or the like can be used.
  • examples of the benzoin ether photopolymerization initiator include benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether, benzoin isopropyl ether, benzoin isobutyl ether, 2,2-dimethoxy-1,2-diphenylethane- Examples thereof include 1-one and anisole methyl ether.
  • acetophenone photopolymerization initiator examples include 2,2-diethoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1-hydroxycyclohexyl phenyl ketone, 4-phenoxydichloroacetophenone, and 4-t-butyldichloroacetophenone. Etc.
  • Examples of ⁇ -ketol photopolymerization initiators include 2-methyl-2-hydroxypropiophenone, 1- [4- (2-hydroxyethyl) phenyl] -2-hydroxy-2-methylpropan-1-one, and the like. Is mentioned.
  • Examples of the photoactive oxime photopolymerization initiator include 1-phenyl-1,1-propanedione-2- (o-ethoxycarbonyl) -oxime.
  • benzoin photopolymerization initiator examples include benzoin.
  • benzyl photopolymerization initiator examples include benzyl and the like.
  • benzophenone photopolymerization initiator examples include benzophenone, benzoylbenzoic acid, 3,3′-dimethyl-4-methoxybenzophenone, polyvinylbenzophenone, ⁇ -hydroxycyclohexyl phenyl ketone, and the like.
  • Ketal photopolymerization initiators include benzyl dimethyl ketal and the like.
  • thioxanthone photopolymerization initiator examples include thioxanthone, 2-chlorothioxanthone, 2-methylthioxanthone, 2,4-dimethylthioxanthone, isopropylthioxanthone, 2,4-dichlorothioxanthone, 2,4-diethylthioxanthone, 2,4 -Diisopropylthioxanthone, dodecylthioxanthone and the like are included.
  • acylphosphine oxide photopolymerization initiator examples include 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, and the like.
  • the photopolymerization initiator (B) having an absorption band at a wavelength of less than 400 nm can be used alone or in combination of two or more.
  • the photopolymerization initiator (B) having an absorption band at a wavelength of less than 400 nm can be added within a range that does not impair the effects of the present invention, and the addition amount is a monofunctional that forms a (meth) acrylic polymer.
  • the amount is preferably about 0.005 to 0.5 part by weight, more preferably about 0.02 to 0.1 part by weight based on 100 parts by weight of the monomeric monomer component.
  • a photopolymerization initiator (B) having an absorption band at a wavelength of less than 400 nm is first added to the monomer component, and a partially polymerized monomer component (prepolymer) partially polymerized by irradiation with ultraviolet rays.
  • the composition is preferably subjected to ultraviolet polymerization by adding a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more and an ultraviolet absorber.
  • the photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more is added to the partial polymerization product (prepolymer composition) of the monomer component partially polymerized by ultraviolet irradiation, the photopolymerization is started. It is preferable to add the agent after dissolving it in the monomer.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention can contain a silane coupling agent.
  • the compounding amount of the silane coupling agent is preferably 1 part by weight or less, more preferably 0.01 to 1 part by weight based on 100 parts by weight of the monofunctional monomer component forming the (meth) acrylic polymer. More preferred is 0.02 to 0.6 parts by weight.
  • silane coupling agent examples include 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2- (3,4 epoxy cyclohexyl).
  • Epoxy group-containing silane coupling agents such as ethyltrimethoxysilane, 3-aminopropyltrimethoxysilane, N-2- (aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-triethoxysilyl-N- (1, (3-dimethylbutylidene) propylamine, amino group-containing silane coupling agents such as N-phenyl- ⁇ -aminopropyltrimethoxysilane, 3-acryloxypropyltrimethoxysilane, 3-methacryloxypropyltriethoxysilane ( (Meth) acrylic group-containing sila Coupling agents, such as isocyanate group-containing silane coupling agents such as 3-isocyanate propyl triethoxysilane and the like.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention can contain a crosslinking agent.
  • crosslinking agents include isocyanate crosslinking agents, epoxy crosslinking agents, silicone crosslinking agents, oxazoline crosslinking agents, aziridine crosslinking agents, silane crosslinking agents, alkyletherified melamine crosslinking agents, metal chelate crosslinking agents, Crosslinkers such as oxides are included.
  • a crosslinking agent can be used alone or in combination of two or more. Among these, an isocyanate type crosslinking agent is preferably used.
  • the crosslinking agent may be used alone or in combination of two or more, but the total content is a monofunctional monomer that forms a (meth) acrylic polymer.
  • the amount is preferably 5 parts by weight or less, more preferably 0.01 to 5 parts by weight, still more preferably 0.01 to 4 parts by weight, and 0.02 to 3 parts by weight with respect to 100 parts by weight of the component. It is preferable to obtain.
  • the isocyanate-based cross-linking agent refers to a compound having two or more isocyanate groups (including an isocyanate-regenerating functional group in which the isocyanate group is temporarily protected by a blocking agent or quantification) in one molecule.
  • the isocyanate-based crosslinking agent include aromatic isocyanates such as tolylene diisocyanate and xylene diisocyanate, alicyclic isocyanates such as isophorone diisocyanate, and aliphatic isocyanates such as hexamethylene diisocyanate.
  • lower aliphatic polyisocyanates such as butylene diisocyanate and hexamethylene diisocyanate
  • alicyclic isocyanates such as cyclopentylene diisocyanate, cyclohexylene diisocyanate and isophorone diisocyanate
  • 2,4-tolylene diisocyanate Aromatic diisocyanates such as 4,4'-diphenylmethane diisocyanate, xylylene diisocyanate, polymethylene polyphenyl isocyanate, trimethylolpropane / tolylene diisocyanate trimer adduct (trade name: Coronate L, manufactured by Nippon Polyurethane Industry Co., Ltd.) ), Trimethylolpropane / hexamethylene diisocyanate trimer adduct (trade name: Coronate HL, manufactured by Nippon Polyurethane Industry Co., Ltd.), hexamethyle Isocyan
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention may contain appropriate additives in addition to the above components depending on the application.
  • tackifiers for example, rosin derivative resins, polyterpene resins, petroleum resins, oil-soluble phenol resins, etc., solid, semi-solid, or liquid at room temperature
  • fillers such as hollow glass balloons; plasticizers; aging Inhibitors; antioxidants and the like.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition is preferably adjusted to have a viscosity suitable for work such as coating on a substrate.
  • the viscosity of the ultraviolet curable acrylic pressure-sensitive adhesive composition can be adjusted, for example, by adding various polymers such as thickening additives, polyfunctional monomers, etc., or partially adding monomer components in the ultraviolet curable acrylic pressure-sensitive adhesive composition. It is carried out by polymerization. The partial polymerization may be performed before or after adding various polymers such as thickening additives, polyfunctional monomers, and the like.
  • the viscosity of the UV curable acrylic pressure-sensitive adhesive composition varies depending on the amount of the additive, etc.
  • the polymerization rate when the monomer component in the UV curable acrylic pressure-sensitive adhesive composition is partially polymerized is uniquely determined.
  • it is preferably about 20% or less, more preferably about 3 to 20%, still more preferably about 5 to 15%. If it exceeds 20%, the viscosity becomes too high, so that it is difficult to apply to the substrate.
  • the transmission b * value of the pressure-sensitive adhesive layer formed by the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention is not particularly limited, but is preferably 3.0 or less, more preferably 1.5 or less. Preferably, it is 0.5 or less.
  • the b * value refers to the b * value (chromaticity) in the L * a * b * color system conforming to JIS Z8729. For example, a spectrophotometer (product name: U4100, manufactured by Hitachi High-Technologies Corporation) ).
  • the transmittance at a wavelength of 380 nm of the pressure-sensitive adhesive layer formed of the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention is 40% or less, preferably 20% or less, and more preferably 8% or less. Since the transmittance wavelength at a wavelength of 380 nm is in the above range, it is possible to sufficiently block incident ultraviolet rays, thereby suppressing deterioration of optical members such as liquid crystal panels, organic EL elements, polarizers, and the like. it can.
  • the transmittance at a wavelength of 400 nm of the pressure-sensitive adhesive layer formed by the ultraviolet curable acrylic pressure-sensitive adhesive composition of the present invention is 30% or more, preferably 50% or more, and preferably 70% or more. More preferred.
  • the excess wavelength at the wavelength of 400 nm is in the above range, it is preferable because sufficient incident visible light can be transmitted and sufficient visibility can be secured in the image display device.
  • UV-curable acrylic pressure-sensitive adhesive layer of the present invention is a pressure-sensitive adhesive layer located between a cover glass or a cover plastic and a polarizing film in an image display device, It is formed by irradiating the ultraviolet curable acrylic pressure-sensitive adhesive composition with ultraviolet rays to photopolymerize a monomer component in the ultraviolet curable acrylic pressure-sensitive adhesive composition.
  • ultraviolet curable acrylic pressure-sensitive adhesive composition those described above can be used.
  • the illumination intensity of the ultraviolet-ray irradiated to the said ultraviolet curable acrylic adhesive composition 5 mW / cm ⁇ 2 > or more is preferable.
  • the illuminance of the ultraviolet light is preferably 200 mW / cm 2 or less.
  • the photopolymerization initiator is consumed rapidly, so that the polymer has a low molecular weight, and the holding power particularly at high temperatures may be reduced.
  • the integrated quantity of ultraviolet light is preferably 100mJ / cm 2 ⁇ 5000mJ / cm 2.
  • the ultraviolet lamp used in the present invention is not particularly limited, but an LED lamp is preferable. Since the LED lamp has a lower emission heat than other ultraviolet lamps, the temperature during polymerization of the pressure-sensitive adhesive layer can be suppressed. Therefore, the molecular weight reduction of the polymer can be prevented, the cohesive strength of the pressure-sensitive adhesive layer can be prevented from being lowered, and the holding power at a high temperature when the pressure-sensitive adhesive sheet is used can be increased. It is also possible to combine a plurality of ultraviolet lamps. Further, it is possible to intermittently irradiate ultraviolet rays, and to provide a light period in which ultraviolet rays are irradiated and a dark period in which ultraviolet rays are not irradiated.
  • the final polymerization rate of the monomer component in the ultraviolet curable acrylic pressure-sensitive adhesive composition is preferably 90% or more, more preferably 95% or more, and still more preferably 98% or more.
  • the peak wavelength of ultraviolet rays irradiated to the ultraviolet curable acrylic pressure-sensitive adhesive composition is preferably in the range of 200 to 500 nm, and more preferably in the range of 300 to 450 nm.
  • the peak wavelength of ultraviolet rays exceeds 500 nm, the photopolymerization initiator may not be decomposed and the polymerization reaction may not start.
  • the peak wavelength of the ultraviolet light is less than 200 nm, the polymer chain may be cut and the adhesive properties may be deteriorated.
  • the thickness of the pressure-sensitive adhesive layer of the present invention is preferably 50 ⁇ m or more, more preferably 100 ⁇ m or more, and further preferably 150 ⁇ m or more, from the viewpoint of ensuring the ultraviolet absorption function.
  • the upper limit of the thickness of an adhesive layer is not specifically limited, It is preferable that it is 10 mm or less. If the thickness of the pressure-sensitive adhesive layer exceeds 10 mm, it is difficult to transmit ultraviolet rays, it takes time to polymerize the monomer component, and productivity may be inferior.
  • the gel fraction of the pressure-sensitive adhesive layer of the present invention is not particularly limited, but is preferably 50% or more, more preferably 75% or more, and further preferably 85% or more.
  • the cohesive force is inferior, and when it is too large, the adhesive force may be inferior.
  • the transmission b * value of the pressure-sensitive adhesive layer, the transmittance at a wavelength of 380 nm, and the transmittance at a wavelength of 400 nm are as described above.
  • the pressure-sensitive adhesive layer of the present invention is used for an image display device, and more specifically, is located between a cover glass or a cover plastic and a polarizing film in the image display device. When the pressure-sensitive adhesive layer of the present invention is in this position, the ultraviolet absorbing function can be sufficiently exhibited.
  • Polarizing film with pressure-sensitive adhesive layer The polarizing film with a pressure-sensitive adhesive layer of the present invention has a polarizing film and the ultraviolet curable acrylic pressure-sensitive adhesive layer on at least one surface of the polarizing film.
  • the method for forming the ultraviolet curable acrylic pressure-sensitive adhesive layer is as described above, and the pressure-sensitive adhesive layer may be formed by applying a direct ultraviolet curable acrylic pressure-sensitive adhesive composition on the polarizing film. After forming the pressure-sensitive adhesive layer on the release film or the like, the pressure-sensitive adhesive layer may be formed on the polarizing film by transferring the pressure-sensitive adhesive layer to the polarizing film.
  • the polarizing film is preferably a polarizing film having a transparent protective film on at least one surface of the polarizer.
  • the polarizer is not particularly limited, and various types can be used.
  • polarizers include dichroic iodine and dichroic dyes on hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films.
  • hydrophilic polymer films such as polyvinyl alcohol films, partially formalized polyvinyl alcohol films, and ethylene / vinyl acetate copolymer partially saponified films.
  • examples thereof include polyene-based oriented films such as those obtained by adsorbing substances and uniaxially stretched, polyvinyl alcohol dehydrated products and polyvinyl chloride dehydrochlorinated products.
  • a polarizer composed of a polyvinyl alcohol film and a dichroic substance such as iodine is preferable.
  • the thickness of these polarizers is not particularly limited, but is generally about 5 to 80 ⁇ m.
  • a polarizer obtained by dyeing a polyvinyl alcohol film with iodine and uniaxially stretching it can be produced, for example, by dyeing polyvinyl alcohol in an aqueous iodine solution and stretching it 3 to 7 times the original length. If necessary, it can be immersed in an aqueous solution of potassium iodide or the like which may contain boric acid, zinc sulfate, zinc chloride or the like. Further, if necessary, the polyvinyl alcohol film may be immersed in water and washed before dyeing.
  • the polyvinyl alcohol film In addition to washing the polyvinyl alcohol film surface with stains and antiblocking agents by washing the polyvinyl alcohol film with water, the polyvinyl alcohol film is also swollen to prevent unevenness such as uneven coloring. is there. Stretching may be performed after dyeing with iodine, may be performed while dyeing, or may be dyed with iodine after stretching. The film can be stretched even in an aqueous solution of boric acid or potassium iodide or in a water bath.
  • a thin polarizer having a thickness of 10 ⁇ m or less can also be used.
  • the thickness is preferably 1 to 7 ⁇ m.
  • Such a thin polarizer is preferable in that the thickness unevenness is small, the visibility is excellent, the dimensional change is small, the durability is excellent, and the thickness of the polarizing film can be reduced.
  • the thin polarizer typically, Japanese Patent Application Laid-Open No. 51-069644, Japanese Patent Application Laid-Open No. 2000-338329, International Publication No. 2010/100917, International Publication No. 2010/100917, or a patent.
  • the thin polarizing film described in the specification of 4751481 and Unexamined-Japanese-Patent No. 2012-0753563 can be mentioned.
  • These thin polarizing films can be obtained by a production method including a step of stretching and dyeing a polyvinyl alcohol-based resin (hereinafter also referred to as PVA-based resin) layer and a stretching resin substrate in the state of a laminate. With this production method, even if the PVA-based resin layer is thin, it can be stretched without problems such as breakage due to stretching by being supported by the stretching resin substrate.
  • PVA-based resin polyvinyl alcohol-based resin
  • International Publication No. 2010/100917 pamphlet in that it can be stretched at a high magnification and the polarization performance can be improved among the production methods including the step of stretching in the state of a laminate and the step of dyeing.
  • those obtained by a production method including a step of stretching in an aqueous boric acid solution as described in International Publication No. 2010/100917 pamphlet or Japanese Patent No. 47514881 and Japanese Patent Application Laid-Open No. 2012-0753563 are preferable.
  • Those obtained by a production method including a step of stretching in the air before stretching in a boric acid aqueous solution described in the specification of 4751481 and Japanese Patent Application Laid-Open No. 2012-0753563 are preferable.
  • 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)
  • AS resin acrylonitrile / styrene copolymer
  • polyethylene, polypropylene, polyolefins having a cyclo or norbornene structure polyolefin polymers such as ethylene / propylene copolymers, vinyl chloride polymers, amide polymers such as nylon and aromatic polyamide, imide polymers, sulfone polymers , 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 Examples of the polymer that forms the transparent protective film include polymer blends.
  • the transparent protective film can also be formed as a cured layer of thermosetting or ultraviolet curable resin such as acrylic, urethane, acrylurethane, epoxy, and silicone.
  • the thickness of the protective film can be appropriately determined, but is generally about 1 to 500 ⁇ m from the viewpoints of workability such as strength and handleability, and thin film properties.
  • the polarizer and the protective film are usually in close contact with each other through an aqueous adhesive or the like.
  • the water-based adhesive include an isocyanate-based adhesive, a polyvinyl alcohol-based adhesive, a gelatin-based adhesive, a vinyl-based latex, a water-based polyurethane, and a water-based polyester.
  • examples of the adhesive between the polarizer and the transparent protective film include an ultraviolet curable adhesive and an electron beam curable adhesive.
  • the electron beam curable polarizing film adhesive exhibits suitable adhesiveness to the various transparent protective films.
  • the adhesive used in the present invention can contain a metal compound filler.
  • the surface of the transparent protective film to which the polarizer is not bonded may be subjected to a treatment for the purpose of hard coat layer, antireflection treatment, sticking prevention, diffusion or antiglare.
  • the pressure-sensitive adhesive layer of the polarizing film with a pressure-sensitive adhesive layer of the present invention when exposed, the pressure-sensitive adhesive layer may be protected with a release film (separator) until practical use.
  • a release film separator
  • the above-mentioned thing can be mentioned as a peeling film.
  • the release film is adhered to the polarizing film with the pressure-sensitive adhesive layer by laminating the pressure-sensitive adhesive layer on the release film and the polarizing film. It can be used as a release film for the agent layer, and the process can be simplified.
  • the present invention is a method for producing a pressure-sensitive adhesive layer formed from an ultraviolet curable acrylic pressure-sensitive adhesive composition containing a photopolymerization initiator (B), Irradiating a composition containing a monomer component containing an alkyl (meth) acrylate and the photopolymerization initiator (B) with ultraviolet rays to form a partial polymer of the monomer component; A step of adding an ultraviolet absorber and a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more to the partially polymerized monomer component to prepare an ultraviolet curable acrylic pressure-sensitive adhesive composition; An ultraviolet curable acrylic pressure-sensitive adhesive comprising a step of applying the ultraviolet curable acrylic pressure-sensitive adhesive composition to at least one surface of a substrate and irradiating the ultraviolet curable acrylic pressure-sensitive adhesive composition with ultraviolet rays.
  • the present invention relates to a method for producing an agent layer.
  • Each component constituting the ultraviolet curable acrylic pressure-sensitive adhesive composition is as described above.
  • a pressure-sensitive adhesive layer from an ultraviolet curable acrylic pressure-sensitive adhesive composition containing a photopolymerization initiator (B)
  • the composition containing (sometimes referred to as “pre-added polymerization initiator”) is irradiated with ultraviolet rays to form a partial polymer of the monomer component.
  • the polymerization rate of the partially polymerized product is preferably about 20% or less, more preferably about 3 to 20%, and further preferably about 5 to 15%.
  • the ultraviolet irradiation conditions are as described above.
  • an ultraviolet absorber and a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more (sometimes referred to as “post-added polymerization initiator”) are added to the partial polymerization product of the monomer component, An ultraviolet curable acrylic pressure-sensitive adhesive composition is prepared.
  • the ultraviolet absorber, the photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more, and the addition amount thereof are as described above.
  • the ultraviolet curable acrylic pressure-sensitive adhesive composition thus obtained is applied to at least one side of the substrate, and the ultraviolet curable acrylic pressure-sensitive adhesive composition is irradiated with ultraviolet rays so that an ultraviolet curable acrylic type is obtained.
  • An adhesive layer can be manufactured.
  • the ultraviolet irradiation conditions are as described above.
  • the substrate is not particularly limited, and examples thereof include various substrates such as a release film and a transparent resin film substrate, and a polarizing film described later is also preferably used as the substrate. it can.
  • the constituent material of the release film examples include resin films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films, porous materials such as paper, cloth, and nonwoven fabric, nets, foam sheets, metal foils, and laminates thereof.
  • resin films such as polyethylene, polypropylene, polyethylene terephthalate, and polyester films
  • porous materials such as paper, cloth, and nonwoven fabric, nets, foam sheets, metal foils, and laminates thereof.
  • a resin film is preferably used from the viewpoint of excellent surface smoothness.
  • the resin film examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, polyurethane film, and ethylene.
  • -Vinyl acetate copolymer film and the like examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthalate film, polybutylene terephthalate film, polyurethane film, and ethylene.
  • -Vinyl acetate copolymer film and the like examples include polyethylene film, polypropylene film, polybutene film, polybutadiene film, polymethylpentene film, polyvinyl chloride film, vinyl chloride copolymer film, polyethylene terephthal
  • the thickness of the release film is usually 5 to 200 ⁇ m, preferably about 5 to 100 ⁇ m.
  • mold release and antifouling treatment with silicone, fluorine, long chain alkyl or fatty acid amide release agent, silica powder, etc., coating type, kneading type, vapor deposition
  • An antistatic treatment such as a mold can also be performed.
  • the release property from the pressure-sensitive adhesive layer can be further improved by appropriately performing a release treatment such as silicone treatment, long-chain alkyl treatment, or fluorine treatment on the surface of the release film.
  • the transparent resin film substrate is not particularly limited, and various resin films having transparency are used.
  • the resin film is formed of a single layer film.
  • the materials include polyester resins such as polyethylene terephthalate and polyethylene naphthalate, acetate resins, polyethersulfone resins, polycarbonate resins, polyamide resins, polyimide resins, polyolefin resins, (meth) acrylic resins.
  • polyester resins, polyimide resins and polyethersulfone resins are particularly preferable.
  • the thickness of the film substrate is preferably 15 to 200 ⁇ m, and more preferably 25 to 188 ⁇ m.
  • the method for applying the ultraviolet curable acrylic pressure-sensitive adhesive composition onto the substrate may be any known appropriate method such as a roll coater, bar coater, or die coater, and is not particularly limited.
  • a release film or the like is formed on the coating layer of the acrylic pressure-sensitive adhesive composition, or the photopolymerization reaction is performed in a nitrogen atmosphere. Is preferred.
  • a peeling film the above-mentioned thing can be mentioned.
  • the photopolymerization initiator (B) is first added and the monomer component part is added.
  • a polymer is formed, and an ultraviolet absorber and a photopolymerization initiator (A) having an absorption band at a wavelength of 400 nm or more are post-added to the partial polymer to prepare an ultraviolet curable acrylic pressure-sensitive adhesive composition. It is preferable.
  • the polymerization rate of the monomer component can be increased, and the ultraviolet ray absorbing function of the finally produced pressure-sensitive adhesive layer can be improved.
  • Image display device The image display device of the present invention has at least a cover glass or a cover plastic and a polarizing film,
  • the pressure-sensitive adhesive layer is provided between the cover glass or cover plastic and a polarizing film.
  • the image display device has at least one polarizing film and at least one cover glass or cover plastic, and the specific configuration is as described above.
  • Examples of the image display device include a liquid crystal display device, an organic EL (electroluminescence) display device, a PDP (plasma display panel), and electronic paper. Among these, a liquid crystal display device having the above-described configuration, an organic paper, and the like. An EL (electroluminescence) display device or the like is preferable.
  • Production Example 1 (Production of acrylic pressure-sensitive adhesive composition (a-1)) Photopolymerization was started on a monomer mixture composed of 78 parts by weight of 2-ethylhexyl acrylate (2EHA), 18 parts by weight of N-vinyl-2-pyrrolidone (NVP) and 4 parts by weight of 2-hydroxyethyl acrylate (HEA).
  • EHA 2-ethylhexyl acrylate
  • NDP N-vinyl-2-pyrrolidone
  • HSA 2-hydroxyethyl acrylate
  • 1-hydroxycyclohexyl phenyl ketone (trade name: Irgacure 184, manufactured by BASF) 0.035 parts by weight, 2,2-dimethoxy-1,2-diphenylethane-1-one (Product name: Irgacure 651, manufactured by BASF) 0.035 parts by weight, and then ultraviolet rays until the viscosity (measurement conditions: BH viscometer No. 5 rotor, 10 rpm, measurement temperature 30 ° C.) is about 20 Pa ⁇ s. To obtain a prepolymer composition (polymerization rate: 8%) in which a part of the monomer component was polymerized.
  • Production Example 2 (Production of acrylic pressure-sensitive adhesive composition (a-2)) 67 parts by weight of butyl acrylate (BA), 14 parts by weight of cyclohexyl acrylate (CHA), 19 parts by weight of 4-hydroxybutyl acrylate (4HBA), 2,2-dimethoxy-1,2-diphenyl-1- ON (product name: Irgacure 651, manufactured by BASF Japan) 0.09 parts by weight and 1-hydroxy-cyclohexyl-phenyl-ketone (product name: Irgacure 184, manufactured by BASF Japan) 0.09 parts by weight
  • a partially polymerized product (monomer syrup) having a polymerization rate of 10% was obtained by putting it into a flask and partially photopolymerizing it by exposing it to ultraviolet rays in a nitrogen atmosphere.
  • DPHA dipentaerythritol penta and hexaacrylate
  • silane coupling agent trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.
  • Example 1 2,4-bis-[ ⁇ 4- (4-ethylhexyloxy) -4-hydroxy ⁇ -phenyl dissolved in acrylic adhesive composition (a-1) to a solid content of 15% in butyl acrylate ] -6- (4-methoxyphenyl) -1,3,5-triazine (trade name: Tinosorb S, manufactured by BASF Japan Ltd.), and bis (2,4,6) as a post-addition polymerization initiator -Trimethylbenzoyl) -phenylphosphine oxide (trade name: Irgacure 819, manufactured by BASF Japan) 0.2 part was added and stirred to obtain an ultraviolet curable acrylic pressure-sensitive adhesive composition.
  • the UV curable acrylic pressure-sensitive adhesive composition is applied onto the release-treated surface of the release film so that the thickness after forming the pressure-sensitive adhesive layer is 150 ⁇ m, and then an application layer is formed. A release film was bonded to the surface of the layer. Thereafter, ultraviolet irradiation was performed under the conditions of illuminance: 6.5 mW / cm 2 and light amount: 1500 mJ / cm 2 to photocur the coating layer, thereby forming an adhesive sheet having release films on both sides of the adhesive layer.
  • Examples 2 to 16, Comparative Examples 1 to 6 Except that the type of acrylic pressure-sensitive adhesive composition used, the ultraviolet absorber, the type and amount of post-added photopolymerization initiator, and the thickness after forming the pressure-sensitive adhesive layer are as shown in Table 1, Examples In the same manner as in Example 1, an ultraviolet curable acrylic pressure-sensitive adhesive composition was prepared, and a pressure-sensitive adhesive sheet was formed. However, for Comparative Examples 5 and 6, as shown in Table 2, since the solubility of the acrylic pressure-sensitive adhesive composition and the ultraviolet absorber was poor, an ultraviolet curable acrylic pressure-sensitive adhesive composition was prepared. The formation of was not performed.
  • a-1 represents the acrylic pressure-sensitive adhesive composition (a-1) obtained in Production Example 1
  • a-2 represents the acrylic pressure-sensitive adhesive composition (a-2) obtained in Production Example 2
  • Tinosorb S is 2,4-bis-[ ⁇ 4- (4-ethylhexyloxy) -4-hydroxy ⁇ -phenyl] -6- (4-methoxyphenyl) -1,3,5-triazine (manufactured by BASF)
  • the Tinuvin 928 is 2- (2H-benzotriazol-2-yl) -6- (1-methyl-1-phenylethyl) -4- (1,1,3,3-tetramethylbutyl) phenol (manufactured by BASF)
  • the LA-F70 is composed of 2,4,6-tris (2-hydroxy-4-hexyloxy-3-methylphenyl) -1,3,5-triazine (made by ADEKA),
  • KEMISORB 279 is 2,2′-methylenebis [6- (benzotria
  • Irgacure 651 2,2-dimethoxy-1,2-diphenylethane-1-one (trade name, manufactured by BASF Japan Ltd.), having an absorption band at a wavelength of 200 to 380 nm
  • Irgacure 184 1-hydroxy-cyclohexyl-phenyl-ketone (trade name, manufactured by BASF Japan Ltd.), having an absorption band at a wavelength of 200 to 370 nm. Is shown.
  • ⁇ Polymerization rate> The release films on both sides of the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples were peeled off, and only the pressure-sensitive adhesive layer was placed on the weighed aluminum petri dish. The weight of (aluminum petri dish + adhesive layer) was measured, and the weight of the adhesive layer before drying was determined. After drying at 130 ° C. for 2 hours and cooling at room temperature for about 20 minutes, the weight of (aluminum petri dish + adhesive) was measured again to determine the weight of the adhesive layer after drying. The polymerization rate was determined by the following calculation formula.
  • a pressure-sensitive adhesive layer wrapped with a tetrafluoroethylene sheet and tied with a kite string (referred to as “sample”) was placed in a 50 mL container filled with ethyl acetate and allowed to stand at 23 ° C. for 7 days. Thereafter, a sample (after ethyl acetate treatment) was taken out from the container, transferred to an aluminum cup, dried in a dryer at 130 ° C. for 2 hours to remove ethyl acetate, and then weighed (Xg). The weight was defined as the weight after immersion.
  • a polarizing film having a TAC film (25 ⁇ m) subjected to hard coating treatment on one surface of a polarizer having a thickness of 12 ⁇ m and an acrylic film (20 ⁇ m) on the other surface of the polarizer was prepared.
  • the release films on both sides of the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples are peeled off, and the pressure-sensitive adhesive layer is bonded onto each protective film of the polarizing film.
  • glass trade name: S200200, thickness: 1.3 mm, size: 45 mm ⁇ 50 mm, manufactured by Matsunami Glass Industry Co., Ltd.
  • the obtained measurement sample was autoclaved (atmospheric pressure: 0.5 MPa, temperature: 50 ° C.) for 15 minutes. It measured with the ultraviolet visible near-infrared spectrophotometer (product name: V7100, JASCO Corporation make), measured the color, and evaluated on the following evaluation criteria.
  • ⁇ : b value is 1.4 or more and 3.4 or less ⁇ : b value exceeds 3.4 and 3.9 or less ⁇ : b value exceeds 3.9
  • a polarizing film is prepared in which one surface of a polarizer having a thickness of 12 ⁇ m is protected by a TAC film (25 ⁇ m) subjected to a hard coat treatment, and the other surface of the polarizer is protected by an acrylic film (20 ⁇ m). did.
  • the release films on both sides of the pressure-sensitive adhesive sheets obtained in Examples and Comparative Examples were peeled off and the pressure-sensitive adhesive layers were bonded together. : S200200, thickness: 1.3 mm, size: 45 mm ⁇ 50 mm, produced by Matsunami Glass Industry Co., Ltd.) was used as a measurement sample.
  • the obtained measurement sample was autoclaved (atmospheric pressure: 0.5 MPa, temperature: 50 ° C.) for 15 minutes. Then, UV-irradiation near-infrared spectrophotometer (product name: V7100, Japan) was put into UV irradiation conditions of illuminance: 500W / cm 2 (300-700nm), environmental temperature: 60-65 ° C, environmental humidity: 50%. And the change in transmittance from the initial stage was determined. Evaluation was performed according to the following evaluation criteria. A: The transmittance change amount is 1.0% or less. ⁇ : The transmittance change amount exceeds 1.0% and is 2.0% or less. (Triangle

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CN113383048A (zh) * 2019-02-06 2021-09-10 日东电工株式会社 带粘合剂层的防反射膜、自发光型显示装置及其制造方法
JP2022526109A (ja) * 2019-03-29 2022-05-23 エルジー・ケム・リミテッド ディスプレイ装置
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