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WO2016117526A1 - Procédé de fabrication de dispositif d'affichage d'image, composition de résine durcissable à utiliser dans ce dernier, panneau tactile et dispositif d'affichage d'image - Google Patents

Procédé de fabrication de dispositif d'affichage d'image, composition de résine durcissable à utiliser dans ce dernier, panneau tactile et dispositif d'affichage d'image Download PDF

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Publication number
WO2016117526A1
WO2016117526A1 PCT/JP2016/051357 JP2016051357W WO2016117526A1 WO 2016117526 A1 WO2016117526 A1 WO 2016117526A1 JP 2016051357 W JP2016051357 W JP 2016051357W WO 2016117526 A1 WO2016117526 A1 WO 2016117526A1
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WO
WIPO (PCT)
Prior art keywords
resin composition
curable resin
liquid crystal
crystal display
meth
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/JP2016/051357
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English (en)
Japanese (ja)
Inventor
貴文 水口
徳田　清久
隼 本橋
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.)
Nippon Kayaku Co Ltd
Original Assignee
Nippon Kayaku 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 Nippon Kayaku Co Ltd filed Critical Nippon Kayaku Co Ltd
Priority to KR1020177020116A priority Critical patent/KR20170105523A/ko
Priority to CN201680006333.2A priority patent/CN107209410B/zh
Priority to JP2016570637A priority patent/JP6633548B2/ja
Publication of WO2016117526A1 publication Critical patent/WO2016117526A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F20/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride, ester, amide, imide or nitrile thereof
    • C08F20/02—Monocarboxylic acids having less than ten carbon atoms, Derivatives thereof
    • C08F20/10—Esters
    • C08F20/12—Esters of monohydric alcohols or phenols
    • C08F20/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
    • C08F20/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
    • 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
    • C09J109/00—Adhesives based on homopolymers or copolymers of conjugated diene hydrocarbons
    • 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
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • C09J175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • C09J175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
    • 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • 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
    • 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

Definitions

  • the present invention relates to an image display device manufacturing method for manufacturing an image display device by bonding an optical substrate having a light-shielding portion and another optical substrate, a curable resin composition used therefor, a touch panel, and an image display device.
  • a touch panel In recent years, display devices that allow screen input by attaching a touch panel to a display screen of a display device such as a liquid crystal display, a plasma display, or an organic EL display have been widely used.
  • a glass plate or a resin film on which a transparent electrode is formed is bonded with a slight gap facing each other. If necessary, a transparent protection made of glass or resin is provided on the touch surface. It has a structure in which plates are bonded together.
  • the present invention relates to a method for manufacturing an image display device capable of obtaining an image display device having excellent visibility without causing ripples when any part of the image display device is pressed, and a curable resin composition used therefor
  • An object is to provide an object, a touch panel, and an image display device.
  • the present invention relates to the following (1) to (14).
  • a method of manufacturing an image display device in which a protective plate is bonded to a liquid crystal display unit The liquid crystal display unit fixes the liquid crystal display unit by surrounding a liquid crystal display cell, a polarizing plate disposed on the liquid crystal display cell, a sealing body that covers the liquid crystal display cell surrounding the polarizing plate, or a peripheral wall portion of the liquid crystal display cell.
  • a method for manufacturing an image display device comprising the following steps (CI) to (C-III) after the step (B): (CI) First curable resin composition curing step for curing the first curable resin composition and bonding the liquid crystal display unit and the protective plate. (CII) Connecting the liquid crystal display unit and the protective plate.
  • the average thickness of the coating film of the first curable resin composition is equal to or less than the average thickness of the coating film of the second curable resin composition, described in (1) or (2) Manufacturing method of the image display apparatus.
  • the transparent plate is formed on the transparent glass substrate having the light shielding part, the transparent resin substrate having the light shielding part, the glass substrate on which the light shielding part and the transparent electrode are formed, and the transparent substrate having the light shielding part. 6.
  • the protective plate is a touch panel.
  • the molar extinction coefficient of the photopolymerization initiator (B) measured in acetonitrile or methanol is 300 ml / (g ⁇ cm) or more at 302 nm or 313 nm, and is 100 ml / (g ⁇ cm) or less at 365 nm.
  • a resin composition having a storage rigidity of 3 to 20 times, and a storage rigidity (25 ° C.) at a curing rate of 80% is 1 ⁇ 10 2 Pa to 1 ⁇ 10 5 Pa (6) to (8)
  • the image display apparatus which has a 2nd hardened
  • the first curable resin composition and the second curable resin composition are a urethane (meth) acrylate compound, a (meth) acrylate compound having a polyisoprene skeleton, and a (meth) acrylate compound having a polybutadiene skeleton.
  • FIG. 1 is a schematic diagram of a configuration of a liquid crystal display unit 1.
  • FIG. 2 is a schematic diagram of a configuration of a protection plate 2.
  • FIG. It is process drawing which shows 2nd Embodiment of the manufacturing method of this invention. It is process drawing which shows 3rd Embodiment of the manufacturing method of this invention. It is process drawing which shows 4th Embodiment of the manufacturing method of this invention. It is the schematic which shows the one aspect
  • the present invention relates to a method of manufacturing an image display device in which a protective plate is bonded to a liquid crystal display unit, wherein the liquid crystal display unit is a liquid crystal display cell, a polarizing plate disposed on the liquid crystal display cell, and the liquid crystal display cell surrounding the polarizing plate.
  • the present invention relates to a manufacturing method of an image display device and an image display device including a casing that fixes a liquid crystal display member by surrounding a sealing body or a peripheral wall portion of a liquid crystal display cell.
  • An image display device is manufactured by [Step A] to [Step B] and [Step CI] to [Step C-III].
  • Step A A step of applying a first curable resin composition, wherein the first curable resin composition having fluidity when uncured is applied to at least one of the liquid crystal display unit or the protective plate.
  • Step B A bonding step of bonding the liquid crystal display unit and the protective plate through the first curable resin composition.
  • Step CI A first curable resin composition curing step of curing the first curable resin composition and bonding the liquid crystal display unit and the protective plate.
  • Step C-II An application step of applying the second curable resin composition to an outer peripheral side surface of the protective plate, the sealing body, or the casing so as to connect the liquid crystal display unit and the protective plate.
  • Step C-III A second curable resin composition curing step in which, after the step [C-II], the second curable resin composition is cured to connect the liquid crystal display unit and the protective plate.
  • [Step A] and [Step B] are performed in this order, but [Step CI] to [Step C-III] may be performed in any order.
  • FIG. 1 is a process diagram showing a first embodiment of a manufacturing process of an image display device (also referred to as “optical member”) of the present invention.
  • This method is a method of obtaining an optical member by bonding the liquid crystal display unit 1 and the protective plate 2 together.
  • the liquid crystal display unit 1 is a liquid crystal display unit in which a liquid crystal material is sealed between a pair of substrates on which electrodes are formed, and a polarizing plate, a driving circuit, a signal input cable, and a backlight unit are provided.
  • FIG. 2 is a cross-sectional view showing a main part of an example of the liquid crystal display unit 1.
  • a polarizing plate 22 is disposed on the liquid crystal display cell 21, and a sealing body 23 is disposed on the liquid crystal display cell 21 so as to surround the polarizing plate 22. ing.
  • the structure in which the polarizing plate 22 is directly laminated on the liquid crystal display cell 21 is shown, but it is not necessary to directly laminate the polarizing plate 22 as long as the polarizing plate is disposed on the liquid crystal display cell.
  • An optical member such as another functional film may be interposed between the cell and the polarizing plate.
  • a gap 24 having a maximum width of several mm is formed between the polarizing plate 22 and the sealing body 23, and a sealing film 25 is provided so that the surface of the liquid crystal display cell 21 is not exposed on the bottom surface of the gap 24. Shows an example in which is arranged. That is, as shown in the example of FIG.
  • the liquid crystal display which is the bottom surface of the gap 24 between the polarizing plate 22 and the sealing body 23.
  • a sealing film 25 having adhesiveness can be disposed to block a part of the gap 24. Since one end of the sealing film 25 in the width direction is adjacent to the polarizing plate 22 and the other end is in close contact with the sealing body 23, the bottom of the gap 24 is sealed.
  • the sealing film 25 may not be arranged on the bottom surface of the gap 24 and the surface of the liquid crystal display cell 21 may be exposed.
  • an adhesive film having polyethylene terephthalate or the like as a film base and having an adhesive layer such as acrylate or an adhesive layer is preferable.
  • the polarizing plate 22 known ones used in image display devices can be used. For example, a film-like absorption polarizer, a wire grid polarizer, or the like can be used.
  • the sealing film 25 does not necessarily need to be solid at the time of arrangement
  • a backlight side polarizing plate (not shown) can be laminated on the surface opposite to the surface on which the polarizing plate 22 is formed.
  • the structure is not limited to the structure in which the backlight side polarizing plate is directly laminated on the liquid crystal display cell 21, and the liquid crystal display cell 21 may be provided with the polarizing plate 22.
  • An optical member such as another functional film may be interposed therebetween.
  • a backlight (not shown) can be formed on the surface opposite to the surface on which the liquid crystal display cell 21 is disposed.
  • the light source constituting the backlight for example, a cold cathode tube, an LED (Light Emitting Diode), or the like can be used.
  • an edge light system in which a light source (not shown) is disposed at one end of a light guide plate (not shown) and linear light from the light source is converted into planar light by the light guide plate can be exemplified.
  • the backlight method is not limited to the edge light method.
  • a direct type system in which a light source is arranged directly below the diffusion plate may be employed.
  • the liquid crystal display unit 1 is usually covered with a casing 26.
  • the casing 26 is generally made of a metal material. Specifically, an alloy such as stainless steel, iron, aluminum, or silver can be used.
  • a liquid crystal display cell, a backlight, a light guide plate, and an optical film can be accommodated in the housing 26.
  • a sealing body 23 is disposed so as to cover the liquid crystal display cell 21.
  • the sealing body 23 is disposed so as to surround the polarizing film with a gap 24 interposed in the peripheral wall portion of the polarizing film 22.
  • the sealing body 23 is coated on the liquid crystal display cell 21 with the sealing film 25 interposed therebetween, but the liquid crystal display cell 21 may be coated directly.
  • the sealing body 23 is an example in which the outer wall of the image display device is coated, and in FIG. 2, the casing 26 disposed adjacent to the peripheral wall portion of the liquid crystal display cell 21 is directly coated. In particular, it is not necessary to limit the arrangement.
  • the backlight side polarizing plate is laminated on the surface of the liquid crystal display cell 21 opposite to the surface on which the polarizing plate 22 is formed, and the backlight side polarizing plate is further backlit.
  • casing 26 can be set as the structure which the sealing body 23 has coat
  • an organic polymer material is generally used.
  • a protective plate 2 shown in FIG. 3 protects the liquid crystal display unit 1.
  • the protective plate 2 is a member having a transparent substrate 3 and a light shielding portion 4 formed on one surface of the transparent substrate 3.
  • Examples of the transparent substrate 3 used for the protective plate 2 include a glass plate or a transparent resin plate.
  • the transparent substrate 3 has a high transparency with respect to light emitted from the display panel and reflected light, as well as light resistance and low birefringence.
  • a glass plate is preferable because it has high plane accuracy, surface scratch resistance, and high mechanical strength.
  • the material for the glass plate examples include glass materials such as sodaime glass, and a high transmission glass that is lower than iron and less bluish is more preferable. In order to improve safety, tempered glass may be used as a surface material. In particular, when a thin glass plate is used, it is preferable to use a chemically strengthened glass plate.
  • the material for the transparent resin plate include highly transparent resin materials such as a polymethyl methacrylate (PMMA) plate, a polycarbonate (PC) plate, and an alicyclic polyolefin polymer (COP) plate.
  • PMMA polymethyl methacrylate
  • PC polycarbonate
  • COP alicyclic polyolefin polymer
  • the protective plate 2 may be subjected to a surface treatment in order to improve the interfacial adhesive force with the cured resin layer.
  • a surface treatment method include a method of treating the surface of the protective plate 2 with a silane coupling agent, a method of forming a silicon oxide thin film by an oxidation flame using a frame burner, and the like.
  • the protective plate 2 is obtained by curing the first cured layer 13 or the second curable resin composition obtained by curing the first curable resin composition described later in order to increase the contrast of the display image.
  • An antireflection layer may be provided on the surface opposite to the side on which the second cured product layer 14 is formed.
  • the antireflection layer can be provided by a method of directly forming an inorganic thin film on the surface of the protective plate 2 or a method of bonding a transparent resin film provided with an antireflection layer to the protective plate 2.
  • a part or the whole of the protective plate 2 is colored, or a part or the whole of the surface of the protective plate 2 is polished to form a glass to scatter light, or a part of the surface of the protective plate 2 is scattered.
  • the transmitted light may be refracted or reflected by forming fine irregularities on the entire surface.
  • a colored film, a light scattering film, a photorefractive film, a light reflecting film or the like may be attached to a part or the whole of the surface of the protective plate 2.
  • the shape of the protection plate 2 is usually rectangular.
  • the size of the protective plate 2 is suitably 0.5 m ⁇ 0.4 m in the case of a television receiver because the manufacturing method of the present invention is particularly suitable for manufacturing a relatively large area image display device. 0.7 m ⁇ 0.4 m or more is particularly preferable.
  • the upper limit of the size of the protection plate 2 is often determined by the size of the display panel. Also, an image display device that is too large is likely to be difficult to handle during installation or the like.
  • the upper limit of the size of the protective plate 2 is usually about 2.5 m ⁇ 1.5 m due to these restrictions.
  • the thickness of the protective plate 2 is usually 0.5 to 25 mm in the case of a glass plate in view of mechanical strength, transparency and the like. For applications such as television receivers and PC displays used indoors, 1 to 6 mm is preferable from the viewpoint of reducing the weight of the display device, and for public display applications installed outdoors, 3 to 20 mm is preferable. When chemically strengthened glass is used, the thickness of the glass is preferably about 0.5 to 1.5 mm in terms of strength. In the case of a transparent resin plate, 2 to 10 mm is preferable.
  • the light-shielding portion 4 hides the wiring member connected to the display panel so that the area other than the image display area of the liquid crystal display cell to be described later cannot be seen from the protective plate 2 side.
  • the light shielding unit 4 can be formed on the surface on the side where the second cured product layer 14 to the first cured product layer 13 described later are formed, and reduces the parallax between the light shielding unit 4 and the image display area.
  • the protective plate 2 is a glass plate, it is preferable to use ceramic printing containing a black pigment in the light-shielding printing portion because of high light shielding properties.
  • the light shielding part 4 may be provided on the surface to be bonded to the protective plate 2, and a film provided with an antireflection layer on the back surface thereof, that is, the outermost surface of the display device may be bonded to the protective plate.
  • the light-shielding portion 4 is formed by attaching a tape, applying paint, printing, or the like.
  • the present invention can also be applied to a device that does not have the light shielding portion 4.
  • the case where the light shielding portion 4 is provided will be described as a specific example.
  • the protective plate 2 which has the light-shielding part 4 for the 1st curable resin composition 11 containing the (meth) acrylate (A) mentioned later and a photoinitiator (B). It is applied to the surface of the surface on which the light shielding portion 4 is formed.
  • the coating method include a slit coater, a roll coater, a spin coater, and a screen printing method.
  • coats the 1st curable resin composition on the protective plate 2 was illustrated, you may apply
  • the 1st curable resin composition 11 should just be apply
  • the storage rigidity at 25 ° C. of the first cured product layer obtained by curing the first curable resin composition 11 is preferably 10 2 to 10 7 Pa, preferably 10 2 to 10 5 Pa is more preferable. Furthermore, 10 2 to 10 4 Pa is particularly preferable in order to eliminate the void at the time of bonding in a shorter time. If the storage rigidity is 10 3 Pa or more, the shape of the first cured product layer 13 is easily maintained. Moreover, even when the thickness of the first curable resin composition 11 to be formed is relatively thick, the thickness can be kept uniform throughout the first cured product layer 13, and the protective plate 2 and the liquid crystal display unit 1 can be maintained.
  • the storage rigidity is 10 7 Pa or less, good adhesion can be exhibited.
  • the molecular mobility of the resin material to be formed is relatively high, the liquid crystal display unit 1 and the protective plate 2 are bonded together in a reduced pressure atmosphere, and then returned to the atmospheric pressure atmosphere.
  • the void volume tends to decrease due to the differential pressure between the pressure of the material (with reduced pressure) and the pressure applied to the hardened material layer of the fill material (atmospheric pressure). Easily dissolved and absorbed.
  • the thickness of the first curable resin composition 11 is preferably 50 to 500 ⁇ m, more preferably 50 to 350 ⁇ m, and particularly preferably 100 to 350 ⁇ m. If the thickness of the 1st curable resin composition 11 is 50 micrometers or more, the 1st hardened
  • cured material layer 13 is 500 micrometers or less, a space
  • the liquid first curable resin composition supplied to the surface of the protective plate 2 while adjusting the thickness of the second cured product layer 14 described later. 11 is a method for adjusting the supply amount.
  • the viscosity of the first curable resin composition 11 is preferably 0.05 to 50 Pa ⁇ s, and more preferably 1 to 20 Pa ⁇ s. If the viscosity is 0.05 Pa ⁇ s or more, a decrease in physical properties of the first cured product layer 13 is suppressed. Moreover, since the component having a low boiling point is reduced, volatilization in a reduced-pressure atmosphere described later is suppressed, which is preferable. If the viscosity is 50 Pa ⁇ s or less, voids hardly remain in the first cured product layer 13. The viscosity of the first curable resin composition 11 is measured using an E-type viscometer at 25 ° C.
  • the first curable resin composition 11 may be a photocurable resin composition or a thermosetting resin composition.
  • a photocurable resin composition containing a curable compound and a photopolymerization initiator is preferable because it can be cured at a low temperature and has a high curing rate.
  • the first curable resin composition 11 may be used for pasting without being cured, but is preferably temporarily cured as described in FIG. Specifically, the coating film of the first curable resin composition 11 after application is irradiated with ultraviolet rays 5, and a cured portion (on the transparent substrate side as viewed from the curable resin composition) on the lower side of the application layer (on the transparent substrate side) A cured product layer having an uncured portion (not shown in the figure) existing on the upper side (opposite side of the transparent substrate side) of the coating layer (on the atmosphere side when performed in the atmosphere) is obtained.
  • the irradiation amount is preferably 5 to 2000 mJ / cm 2 , more preferably 10 to 1000 mJ / cm 2 , and particularly preferably 10 to 500 mJ / cm 2 . If the amount of irradiation is too small, the degree of cure of the resin of the optical member finally bonded may be insufficient. If the amount of irradiation is too large, the amount of uncured components decreases, and the liquid crystal display unit 1 and the light-shielding portion are removed. Bonding of the protective plate 2 may be poor.
  • “uncured” refers to a fluid state in a 25 ° C. environment.
  • any light source may be used as long as it is a lamp that irradiates ultraviolet to near ultraviolet rays.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp or electrodeless lamp can be used.
  • step 1 of the present invention when the maximum illuminance in the range of 320 nm to 450 nm is 100, the ratio of the maximum illuminance at 200 to 320 nm (illuminance ratio) ) Is 30 or less, and particularly preferably, the illuminance at 200 to 320 nm is 10 or less.
  • the maximum illuminance in the range of 320 nm to 450 nm is 100, if the ratio of maximum illuminance (illuminance ratio) at 200 to 320 nm is higher than 30, the adhesive strength of the finally obtained optical member will be inferior.
  • the illuminance is usually 30 to 1000 mW / cm 2 at each wavelength (for example, 365 nm).
  • the method of irradiating ultraviolet rays so as to achieve the above illuminance ratio includes, for example, a method of applying a lamp that satisfies the illuminance ratio as a lamp that irradiates ultraviolet to near ultraviolet rays, Even if the above condition is not satisfied, such illuminance can be obtained by using a base material (for example, a short wave ultraviolet cut filter, a glass plate, a film, etc.) that cuts short wavelength ultraviolet rays at the time of irradiation in step 1. Irradiation at a ratio is possible. Although it does not specifically limit as a base material which adjusts the illumination intensity ratio of an ultraviolet-ray, For example, the glass plate, soda-lime glass, PET film etc.
  • the ultraviolet rays from the upper surface (on the side opposite to the transparent substrate as viewed from the curable resin composition layer) (normal air surface) on the coating side in normal air. Further, ultraviolet irradiation may be performed while spraying a curing-inhibiting gas on the upper surface of the coating layer after evacuation.
  • the side opposite to the liquid crystal display unit side or the side opposite to the transparent substrate side is the atmosphere side.
  • the state of the uncured portion and the film thickness of the uncured portion can be adjusted by spraying oxygen or ozone onto the surface of the ultraviolet curable resin layer (coating layer) during the ultraviolet irradiation. That is, by spraying oxygen or ozone on the surface of the coating layer, oxygen inhibition of curing of the curable resin composition occurs on the surface, so that the uncured portion of the surface can be ensured, The film thickness can be increased.
  • the curing rate represents the curing rate as seen from the curing component of the curable resin composition, and represents a value calculated by excluding components that are not cured such as a softening agent.
  • the curing shrinkage can be calculated from the following formula (1) from the liquid specific gravity before curing at 25 ° C. and the film specific gravity at 25 ° C. obtained by curing.
  • the first curable resin composition 11 used in the present invention has the above-mentioned [Step CI] or [Step C] with respect to the storage rigidity at 25 ° C. of the resin layer when irradiated with ultraviolet rays in the above [Step B].
  • the storage rigidity of the resin layer when irradiated with ultraviolet rays is preferably 3 to 20 times (preferably 3 to 10 times).
  • it can be measured by the following method. Specifically, two 40 ⁇ m-thick PET films coated with a fluorine-based mold release agent are prepared, and a film obtained by curing the obtained curable resin composition on one of the release agent-coated surfaces.
  • the two PET films are bonded together so that the respective release agent application surfaces face each other.
  • the resin composition is cured by irradiating ultraviolet rays with an integrated light quantity of 2000 mJ / cm 2 with a high-pressure mercury lamp (80 W / cm, ozone-less) through a PET film.
  • the two PET films are peeled off to produce a cured product for measuring the rigidity.
  • the rigidity can be measured in a temperature range of 20 to 40 ° C. using ARES (TA Instruments).
  • the curing rate during the main curing in [Step CI] is 95% or more.
  • the first curable resin composition 11 used in the present invention preferably has a storage rigidity of 1 ⁇ 10 2 Pa to 1 ⁇ 10 4 Pa at 25 ° C. during the temporary curing. If the storage rigidity is greater than 1 ⁇ 10 4 Pa, the first curable resin composition 11 has a shrinking force due to curing, so the first curable resin composition 11 does not follow the substrate, When peeling occurs, the substrate is distorted, or the stress is not sufficiently relaxed, display unevenness occurs when an optical member is obtained.
  • the storage rigidity at the time of pre-curing is in the above range, so that the space created at the time of bonding can be made of resin without causing problems when moved to atmospheric pressure. It becomes possible to fill.
  • the storage rigidity is preferably 300 to 3000 Pa, and more preferably 500 to 2000 Pa.
  • the curing rate of the resin at the time of temporary curing is 60 to 90%, and the storage rigidity of the cured product having the curing rate is the above value and the preferable value, thereby preventing the distortion and display unevenness of the substrate. it can.
  • the curing rate at the time of main curing in [Step CI] described later is usually 95% or more.
  • the storage rigidity of the resin layer when irradiated with ultraviolet rays in [Step CI] described later is 1. It is preferable to use a resin composition of 5 to 10 times.
  • the storage rigidity of the resin layer when irradiated with ultraviolet rays at a curing rate of 98% is 1.5% with respect to the storage rigidity at 25 ° C. of the resin layer when irradiated with ultraviolet rays at a curing rate of 80%. It is preferable to use a resin composition of up to 10 times.
  • the storage rigidity of the resin layer when irradiated with ultraviolet rays in [Step CI] or [Step C-III] described later is 2 It is more preferably 7 times, and particularly preferably 2.5 to 5 times.
  • the storage rigidity of the resin layer when irradiated with ultraviolet rays at a curing rate of 98% is 2 to 7 with respect to the storage rigidity at 25 ° C. of the resin layer when irradiated with ultraviolet rays at a curing rate of 80%. Is preferably doubled, and is particularly preferably 2.5 to 5 times.
  • the curable resin composition used in the method of the present invention has a storage rigidity at 25 ° C. of 1 ⁇ 10 3 Pa to 1 ⁇ 10 6 Pa is preferable.
  • the storage rigidity is higher than 1 ⁇ 10 6 Pa, the shrinkage of the curable resin composition becomes too large due to curing, and thus the base material may be distorted or the stress is not sufficiently relaxed. The possibility of display unevenness when the member is obtained is reduced.
  • the storage rigidity is preferably 1.0 ⁇ 10 3 to 1.0 ⁇ 10 5 Pa, and more preferably 1.0 ⁇ 10 3 to 3.0 ⁇ 10 4 Pa.
  • Step B Next, with the liquid crystal display unit 1 and the surface of the protective plate 2 on which the first curable resin composition 11 is formed facing each other, as shown in FIG.
  • the protective plate 2 which has is bonded together. Bonding can be performed either in air or in vacuum. Here, in order to make it easy to prevent bubbles from being generated at the time of bonding, it is preferable to bond in a vacuum.
  • the first curable resin composition 11 is bonded together after obtaining a cured product of an ultraviolet curable resin having a cured portion and an uncured portion, an improvement in adhesion can be expected.
  • the 1st curable resin composition 11 is spread by press etc., and the 1st curable resin composition 11 is filled in space.
  • the first cured product layer 13 with few or no voids is formed when exposed to a high pressure atmosphere thereafter.
  • a reduced pressure atmosphere it is 1 kPa or less, preferably 10 to 300 Pa, more preferably 15 to 100 Pa. You may cancel
  • the first curable resin composition 11 flows in the space, and the interval between the liquid crystal display unit 1 and the protective plate 2 is made uniform. It becomes easier to do.
  • the optical member obtained by bonding the protective plate 2 and the liquid crystal display unit 1 is irradiated with the ultraviolet rays 5 from the protective plate 2 side, and a curable resin composition (coating) Layer).
  • the dose of ultraviolet rays is preferably from about 100 ⁇ 4000mJ / cm 2 in accumulated light quantity, particularly preferably from 200 ⁇ 3000mJ / cm 2 or so, more highly preferably 1500 ⁇ 3000mJ / cm 2.
  • the light source used for curing by irradiation with ultraviolet to near ultraviolet light may be any lamp as long as it is a lamp that emits ultraviolet to near ultraviolet light.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp, or electrodeless lamp may be used.
  • Step C-II Furthermore, as shown in FIG.1 (c), the liquid crystal display unit 1 and a protective plate are connected with the 2nd curable resin composition 12 containing the (meth) acrylate (A) and photoinitiator (B) which are mentioned later.
  • the 2nd curable resin composition 12 containing the (meth) acrylate (A) and photoinitiator (B) which are mentioned later.
  • coat coat to the outer peripheral side part of the sealing body 23 on the protective plate 2.
  • the second curable resin composition 12 may be applied to the outer peripheral side surface of the sealing body 23 or the housing 26, As a result, the liquid crystal display unit 1 and the protective plate need only be connected.
  • coats the 2nd curable resin composition 12 on the protective plate 2 was illustrated, another optical member may intervene between the protective plate 2 and the 2nd curable resin composition 12.
  • the outer peripheral side surface portion of the housing 26 is applied as the second curable resin composition to the outer peripheral side surface portion of the housing 26.
  • the form of the liquid crystal display unit 1 or the form of application is particularly applicable if the second curable resin composition is applied to the outer peripheral side surface of the housing 26.
  • the form is not limited.
  • Examples of the application method include a dispensing method.
  • the first curable resin composition and the second curable resin composition applied to the surfaces of the liquid crystal display unit 1 and the protective plate 2 may be the same or different curable resin compositions may be used. I do not care.
  • the 2nd curable resin composition 12 is apply
  • the second curable resin composition 12 is applied to the outer peripheral side surface portion of the casing 26 that fixes the sealing body 23 or the liquid crystal display unit 1 while avoiding the projection area of the liquid crystal display cell, so that the second curable resin composition is applied.
  • curing the resin composition 12 is formed in the outer peripheral side part of the housing
  • the pressure does not easily propagate to the liquid crystal display cell. It can be prevented from occurring.
  • the second cured product layer 12 is laminated on the display region of the liquid crystal display cell or the polarizing plate, ripples are generated due to interference when pressure is applied to the second cured product layer or the peripheral wall portion of the image display region. It will be.
  • the second cured product layer 14 is laminated in this manner, the distance between the protective plate 2 and the liquid crystal display unit 1 can be maintained, and even when pressed by a finger or the like, the pressure is transmitted to the liquid crystal display unit or the polarizing plate.
  • the application of the second curable resin composition 12 is preferably formed in a rectangular frame shape along the outer peripheral side surface of the casing 26 that fixes the sealing body 23 or the liquid crystal display unit 1. Moreover, you may apply
  • the coating thickness of the second curable resin composition 12 may be sufficient to connect the liquid crystal display unit and the protective plate, but is thicker than the thickness of the first curable resin composition 11 to be formed. Become.
  • the thickness of the first curable resin composition 11 to be formed is preferably 0.01 to 10 mm thick, more preferably 0.1 to 5 mm thick, and more preferably 0.5 to 3 mm thick.
  • the storage rigidity at 25 ° C. at the time of curing in the second curable resin composition 12 is preferably larger than the storage rigidity at 25 ° C. of the cured product layer of the first curable resin composition 11.
  • the liquid crystal display unit 1 and the protective plate 2 are When connecting, since it is strong against deformation due to external pressure and can be connected more firmly, the influence on the gap thickness of the first curable resin layer can be reduced.
  • the second curable resin composition 12 and the first curable resin so that the shrinkage rate at the time of curing of the second curable resin composition 12 is larger than the shrinkage rate at the time of curing of the first curable resin composition 11. It is preferable to design the composition 11. In the first cured product layer 13 formed by curing the first curable resin composition 11, it is considered that the shrinkage stress corresponding to the shrinkage rate at the time of curing remains in the thickness direction of the first cured product layer 13. In addition, the thickness of the first cured product layer 13 slightly decreases due to the shrinkage stress in the thickness direction remaining in the layered portion at the time of curing. By using the first curable resin composition 11 having a smaller shrinkage rate at the time of curing than the second curable resin composition 12, it is possible to relieve the stress in the display region and suppress the occurrence of display unevenness.
  • One of means for increasing the shrinkage rate at the time of curing of the second curable resin composition 12 to be larger than the shrinkage rate at the time of curing of the first curable resin composition 11 is that of the curable group of the second curable resin composition 12.
  • the number is to be larger than the number of curable groups of the first curable resin composition 11.
  • the viscosity of the second curable resin composition 12 may be higher than the viscosity of the first curable resin composition 11.
  • the uncured viscosity of the second curable resin composition 12 is preferably 2 times or more, more preferably 5 times or more of the uncured viscosity of the first curable resin composition 11. More than double is more preferable.
  • the viscosity at the time of uncured at 25 degreeC of the 2nd curable resin composition 12 shall be 3000 Pa.s or less. Is preferred.
  • the preferable viscosity of the second curable resin composition 12 is specifically 40 to 70 Pa ⁇ s. If it is less than 40 Pa ⁇ s, the second curable resin composition 12 cannot maintain its shape and spreads, and it becomes difficult to control the thickness. The thing 12 may be destroyed. On the other hand, when the viscosity exceeds 70 Pa ⁇ s, it may be difficult to discharge from the applicator.
  • the second curable resin composition 12 may be a photocurable resin composition or a thermosetting resin composition.
  • the photocurable resin composition containing a curable compound and a photoinitiator is preferable from the point which can be hardened
  • uncured refers to a fluid state in a 25 ° C. environment.
  • any light source may be used as long as it is a lamp that irradiates ultraviolet to near ultraviolet rays.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp or electrodeless lamp can be used.
  • the thickness of the coating film 11 of the first curable resin composition and the thickness of the coating film of the second curable resin composition 12 were measured using a laser displacement meter (LK-H052K, manufactured by Keyence Corporation) It can be obtained by measuring the total thickness of the coating film of the first curable resin composition 11 or the coating film of the second curable resin composition 12 formed thereon. Also, depending on the surface shape of the coating film of the first curable resin composition 11 or the coating film of the second curable resin composition 12, it may be difficult to measure the thickness with the laser displacement meter.
  • the thickness of the coating film of the first curable resin composition 11 and the thickness of the coating film of the second curable resin composition 12 are measured using a 3D shape measuring machine (high precision shape measuring system KS-1100) or the like. You may measure.
  • the 2nd curable resin composition 12 is hardened and the 2nd hardened
  • the curing means includes heat or light, but it is preferable to cure by irradiating light. Although it does not specifically limit as a direction of light irradiation, It is preferable to irradiate from the side part of the image display apparatus obtained, or to irradiate from the liquid crystal display unit 1 side.
  • the dose of ultraviolet rays is preferably from about 100 ⁇ 4000mJ / cm 2 in accumulated light quantity, particularly preferably from 200 ⁇ 3000mJ / cm 2 or so, more highly preferably 1500 ⁇ 3000mJ / cm 2.
  • the light source used for curing by irradiation with ultraviolet to near ultraviolet light may be any lamp as long as it is a lamp that emits ultraviolet to near ultraviolet light.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp, or electrodeless lamp may be used. In this way, the image display device shown in FIG. 7 can be obtained.
  • FIG. 4 is a process diagram showing a second embodiment of the optical member manufacturing process of the present invention.
  • This method is a method of obtaining an optical member (image display device) by bonding the liquid crystal display unit 1 and the protective plate 2 together. Note that portions other than the parts changed from the first embodiment can be taken in by reflecting the matters described in the first embodiment, and descriptions that partially overlap are omitted.
  • the 1st curable resin composition 11 containing the (meth) acrylate (A) and photoinitiator (B) mentioned later of the protection plate 2 which has the light-shielding part 4 is shown. It is applied to the surface of the surface where the light shielding part 4 is formed.
  • the coating method include a slit coater, a roll coater, a spin coater, and a screen printing method.
  • coats the 1st curable resin composition on the protective plate 2 was illustrated, you may apply
  • the 1st curable resin composition 11 should just be apply
  • the first curable resin composition 11 may be a photocurable resin composition or a thermosetting resin composition.
  • a photocurable resin composition containing a curable compound and a photopolymerization initiator is preferable because it can be cured at a low temperature and has a high curing rate.
  • the first curable resin composition 11 may be used for pasting without being cured, but is preferably temporarily cured as described in FIG. Specifically, the coating film of the first curable resin composition 11 after application is irradiated with ultraviolet rays 5, and a cured portion (on the transparent substrate side as viewed from the curable resin composition) on the lower side of the application layer (on the transparent substrate side) A cured product layer having an uncured portion (not shown in the figure) existing on the upper side (opposite side of the transparent substrate side) of the coating layer (on the atmosphere side when performed in the atmosphere) is obtained.
  • the irradiation amount is preferably 5 to 2000 mJ / cm 2 , more preferably 10 to 1000 mJ / cm 2 , and particularly preferably 10 to 500 mJ / cm 2 . If the amount of irradiation is too small, there is a risk that the degree of cure of the resin of the optical member that is finally bonded will be insufficient. There is a possibility that the bonding of the protective plate 2 will be poor.
  • “uncured” refers to a fluid state in a 25 ° C. environment. In addition, when the resin composition layer is touched with a finger after ultraviolet irradiation and a liquid component adheres to the finger, it is determined to have an uncured portion.
  • Step B Next, with the liquid crystal display unit 1 and the surface of the protective plate 2 on which the first curable resin composition 11 is formed facing each other, as shown in FIG.
  • the protective plate 2 which has is bonded together. Bonding can be performed either in air or in vacuum. Here, in order to make it easy to prevent bubbles from being generated at the time of bonding, it is preferable to bond in a vacuum.
  • the first curable resin composition 11 is bonded together after obtaining a cured product of an ultraviolet curable resin having a cured portion and an uncured portion, an improvement in adhesion can be expected.
  • the 1st curable resin composition 11 is spread by press etc., and the 1st curable resin composition 11 is filled in space.
  • the first cured product layer 13 with few or no voids is formed when exposed to a high pressure atmosphere thereafter.
  • a reduced pressure atmosphere it is 1 kPa or less, preferably 10 to 300 Pa, more preferably 15 to 100 Pa. You may cancel
  • the first curable resin composition 11 flows in the space, and the interval between the liquid crystal display unit 1 and the protective plate 2 is made uniform. It becomes easier to do.
  • Step C-II Furthermore, as shown in FIG. 4B, the liquid crystal display unit 1 and the protective plate are connected to the second curable resin composition 12 containing the (meth) acrylate (A) and the photopolymerization initiator (B) described above.
  • the second curable resin composition 12 may be applied to the outer peripheral side surface of the sealing body 23 or the housing 26, As a result, the liquid crystal display unit 1 and the protective plate need only be connected.
  • coats the 2nd curable resin composition 12 on the protective plate 2 was illustrated, another optical member may intervene between the protective plate 2 and the 2nd curable resin composition 12.
  • the outer peripheral side surface portion of the housing 26 is applied as the second curable resin composition to the outer peripheral side surface portion of the housing 26.
  • the form of the liquid crystal display unit 1 or the form of application is particularly applicable if the second curable resin composition is applied to the outer peripheral side surface of the housing 26.
  • the form is not limited.
  • Examples of the application method include a dispensing method.
  • the first curable resin composition and the second curable resin composition applied to the surfaces of the liquid crystal display unit 1 and the protective plate 2 may be the same or different curable resin compositions may be used. I do not care.
  • the application of the second curable resin composition 12 is preferably formed in a rectangular frame shape along the outer peripheral side surface of the casing 26 that fixes the sealing body 23 or the liquid crystal display unit 1. Moreover, you may apply
  • the coating thickness of the second curable resin composition 12 may be sufficient to connect the liquid crystal display unit and the protective plate, but is thicker than the thickness of the first curable resin composition 11 to be formed. Become.
  • the thickness of the first curable resin composition 11 to be formed is preferably 0.01 to 10 mm thick, more preferably 0.1 to 5 mm thick, and more preferably 0.5 to 3 mm thick.
  • the storage rigidity at 25 ° C. at the time of curing in the second curable resin composition 12 is preferably larger than the storage rigidity at 25 ° C. of the cured product layer of the first curable resin composition 11.
  • the liquid crystal display unit 1 and the protective plate 2 are When connecting, since it is strong against deformation due to external pressure and can be connected more firmly, the influence on the gap thickness of the first curable resin layer can be reduced.
  • the second curable resin composition 12 may be a photocurable resin composition or a thermosetting resin composition.
  • the photocurable resin composition containing a curable compound and a photoinitiator is preferable from the point which can be hardened
  • the optical member obtained by bonding the protective plate 2 and the liquid crystal display unit 1 is irradiated with the ultraviolet-ray 5 from the protective plate 2 side, and curable resin composition (application
  • the second curable resin composition 12 is cured to form the second cured product layer 14.
  • the dose of ultraviolet rays is preferably from about 100 ⁇ 4000mJ / cm 2 in accumulated light quantity, particularly preferably from 200 ⁇ 3000mJ / cm 2 or so, more highly preferably 1500 ⁇ 3000mJ / cm 2.
  • the light source used for curing by irradiation with ultraviolet to near ultraviolet light may be any lamp as long as it is a lamp that emits ultraviolet to near ultraviolet light.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp, or electrodeless lamp may be used. In this way, the image display device shown in FIG. 7 can be obtained.
  • FIG. 5 is a process diagram showing a third embodiment of the manufacturing process of the optical member of the present invention.
  • This method is a method of obtaining an optical member (image display device) by bonding the liquid crystal display unit 1 and the protective plate 2 together. Note that portions other than the parts changed from the first embodiment can be taken in by reflecting the matters described in the first embodiment, and descriptions that partially overlap are omitted.
  • the 1st curable resin composition 11 containing the (meth) acrylate (A) and photoinitiator (B) mentioned later of the protection plate 2 which has the light-shielding part 4 is shown. It is applied to the surface of the surface where the light shielding part 4 is formed.
  • the coating method include a slit coater, a roll coater, a spin coater, and a screen printing method.
  • coats the 1st curable resin composition on the protective plate 2 was illustrated, you may apply
  • the 1st curable resin composition 11 should just be apply
  • the first curable resin composition 11 may be a photocurable resin composition or a thermosetting resin composition.
  • a photocurable resin composition containing a curable compound and a photopolymerization initiator is preferable because it can be cured at a low temperature and has a high curing rate.
  • the first curable resin composition 11 may be used for pasting without curing, but is preferably temporarily cured as described in FIG. Specifically, the coating film of the first curable resin composition 11 after application is irradiated with ultraviolet rays 5, and a cured portion (on the transparent substrate side as viewed from the curable resin composition) on the lower side of the application layer (on the transparent substrate side) A cured product layer having an uncured portion (not shown in the figure) existing on the upper side (opposite side of the transparent substrate side) of the coating layer (on the atmosphere side when performed in the atmosphere) is obtained.
  • the irradiation amount is preferably 5 to 2000 mJ / cm 2 , more preferably 10 to 1000 mJ / cm 2 , and particularly preferably 10 to 500 mJ / cm 2 . If the amount of irradiation is too small, there is a risk that the degree of cure of the resin of the optical member that is finally bonded will be insufficient. There is a possibility that the bonding of the protective plate 2 will be poor.
  • “uncured” refers to a fluid state in a 25 ° C. environment. In addition, when the resin composition layer is touched with a finger after ultraviolet irradiation and a liquid component adheres to the finger, it is determined to have an uncured portion.
  • Step B Next, with the liquid crystal display unit 1 and the surface of the protective plate 2 on which the first curable resin composition 11 is formed facing each other, as shown in FIG.
  • the protective plate 2 which has is bonded together. Bonding can be performed either in air or in vacuum. Here, in order to make it easy to prevent bubbles from being generated at the time of bonding, it is preferable to bond in a vacuum.
  • the first curable resin composition 11 is bonded together after obtaining a cured product of an ultraviolet curable resin having a cured portion and an uncured portion, an improvement in adhesion can be expected.
  • the 1st curable resin composition 11 is spread by press etc., and the 1st curable resin composition 11 is filled in space.
  • the first cured product layer 13 with few or no voids is formed when exposed to a high pressure atmosphere thereafter.
  • a reduced pressure atmosphere it is 1 kPa or less, preferably 10 to 300 Pa, more preferably 15 to 100 Pa. You may cancel
  • the first curable resin composition 11 flows in the space, and the interval between the liquid crystal display unit 1 and the protective plate 2 is made uniform. It becomes easier to do.
  • Step C-II Furthermore, as shown in FIG. 5B, the liquid crystal display unit 1 and the protective plate are connected to the second curable resin composition 12 containing the (meth) acrylate (A) and the photopolymerization initiator (B) described above.
  • the second curable resin composition 12 may be applied to the outer peripheral side surface of the sealing body 23 or the housing 26, As a result, the liquid crystal display unit 1 and the protective plate need only be connected.
  • coats the 2nd curable resin composition 12 on the protective plate 2 was illustrated, another optical member may intervene between the protective plate 2 and the 2nd curable resin composition 12.
  • the outer peripheral side surface portion of the housing 26 is applied as the second curable resin composition to the outer peripheral side surface portion of the housing 26.
  • the form of the liquid crystal display unit 1 or the form of application is particularly applicable if the second curable resin composition is applied to the outer peripheral side surface of the housing 26.
  • the form is not limited.
  • Examples of the application method include a dispensing method.
  • the first curable resin composition and the second curable resin composition applied to the surfaces of the liquid crystal display unit 1 and the protective plate 2 may be the same or different curable resin compositions may be used. I do not care.
  • coating to the 2nd curable resin composition 12 is formed in the rectangular frame shape so that the outer peripheral side part of the housing
  • the coating thickness of the second curable resin composition 12 may be sufficient to connect the liquid crystal display unit and the protective plate, but is thicker than the thickness of the first curable resin composition 11 to be formed. Become.
  • the thickness of the first curable resin composition 11 to be formed is preferably 0.01 to 10 mm thick, more preferably 0.1 to 5 mm thick, and more preferably 0.5 to 3 mm thick.
  • the storage rigidity at 25 ° C. at the time of curing in the second curable resin composition 12 is preferably larger than the storage rigidity at 25 ° C. of the cured product layer of the first curable resin composition 11.
  • the liquid crystal display unit 1 and the protective plate 2 are When connecting, since it is strong against deformation due to external pressure and can be connected more firmly, the influence on the gap thickness of the first curable resin layer can be reduced.
  • the second curable resin composition 12 may be a photocurable resin composition or a thermosetting resin composition.
  • the photocurable resin composition containing a curable compound and a photoinitiator is preferable from the point which can be hardened
  • the 2nd curable resin composition 12 is hardened
  • the curing means includes heat or light, but it is preferable to cure by irradiating light. Although it does not specifically limit as a direction of light irradiation, It is preferable to irradiate from the side part of the image display apparatus obtained, or to irradiate from the liquid crystal display unit 1 side.
  • the dose of ultraviolet rays is preferably from about 100 ⁇ 4000mJ / cm 2 in accumulated light quantity, particularly preferably from 200 ⁇ 3000mJ / cm 2 or so, more highly preferably 1500 ⁇ 3000mJ / cm 2.
  • the light source used for curing by irradiation with ultraviolet to near ultraviolet light may be any lamp as long as it is a lamp that emits ultraviolet to near ultraviolet light.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp, or electrodeless lamp may be used.
  • the optical member obtained by bonding the protective plate 2 and the liquid crystal display unit 1 is irradiated with the ultraviolet rays 5 from the protective plate 2 side, and a curable resin composition (coating) Layer).
  • the dose of ultraviolet rays is preferably from about 100 ⁇ 4000mJ / cm 2 in accumulated light quantity, particularly preferably from 200 ⁇ 3000mJ / cm 2 or so, more highly preferably 1500 ⁇ 3000mJ / cm 2.
  • the light source used for curing by irradiation with ultraviolet to near ultraviolet light may be any lamp as long as it is a lamp that emits ultraviolet to near ultraviolet light.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp, or electrodeless lamp may be used.
  • the image display device shown in FIG. 7 can be obtained.
  • FIG. 6 is a process diagram showing a fourth embodiment of a process for producing an optical member of the present invention.
  • This method is a method of obtaining an optical member (image display device) by bonding the liquid crystal display unit 1 and the protective plate 2 together. Note that portions other than the parts changed from the first embodiment can be taken in by reflecting the matters described in the first embodiment, and descriptions that partially overlap are omitted.
  • the 1st curable resin composition 11 containing the (meth) acrylate (A) and photoinitiator (B) mentioned later of the protection plate 2 which has the light-shielding part 4 is used. It is applied to the surface of the surface where the light shielding part 4 is formed.
  • the coating method include a slit coater, a roll coater, a spin coater, and a screen printing method.
  • coats the 1st curable resin composition on the protective plate 2 was illustrated, you may apply
  • the 1st curable resin composition 11 should just be apply
  • the first curable resin composition 11 may be a photocurable resin composition or a thermosetting resin composition.
  • a photocurable resin composition containing a curable compound and a photopolymerization initiator is preferable because it can be cured at a low temperature and has a high curing rate.
  • the first curable resin composition 11 may be used for pasting without curing, but is preferably temporarily cured as described in FIG. Specifically, the coating film of the first curable resin composition 11 after application is irradiated with ultraviolet rays 5, and a cured portion (on the transparent substrate side as viewed from the curable resin composition) on the lower side of the application layer (on the transparent substrate side) A cured product layer having an uncured portion (not shown in the figure) existing on the upper side (opposite side of the transparent substrate side) of the coating layer (on the atmosphere side when performed in the atmosphere) is obtained.
  • the irradiation amount is preferably 5 to 2000 mJ / cm 2 , more preferably 10 to 1000 mJ / cm 2 , and particularly preferably 10 to 500 mJ / cm 2 . If the amount of irradiation is too small, there is a risk that the degree of cure of the resin of the optical member that is finally bonded will be insufficient. There is a possibility that the bonding of the protective plate 2 will be poor.
  • “uncured” refers to a fluid state in a 25 ° C. environment. In addition, when the resin composition layer is touched with a finger after ultraviolet irradiation and a liquid component adheres to the finger, it is determined to have an uncured portion.
  • Step B Next, as shown in FIG. 6B, the liquid crystal display unit 1 and the light shielding portion are arranged so that the liquid crystal display unit 1 and the surface of the protective plate 2 coated with the first curable resin composition 11 face each other.
  • the protective plate 2 which has is bonded together. Bonding can be performed either in air or in vacuum. Here, in order to make it easy to prevent bubbles from being generated at the time of bonding, it is preferable to bond in a vacuum.
  • the first curable resin composition 11 is bonded together after obtaining a cured product of an ultraviolet curable resin having a cured portion and an uncured portion, an improvement in adhesion can be expected.
  • the 1st curable resin composition 11 is spread by press etc., and the 1st curable resin composition 11 is filled in space.
  • the first cured product layer 13 with few or no voids is formed when exposed to a high pressure atmosphere thereafter.
  • pasting is performed in a reduced pressure atmosphere, it is 1 kPa or less, preferably 10 to 300 Pa, more preferably 15 to 100 Pa. You may cancel
  • the first curable resin composition 11 flows in the space, and the interval between the liquid crystal display unit 1 and the protective plate 2 is made uniform. It becomes easier to do.
  • Step C-II Further, as shown in FIG. 6B, the liquid crystal display unit 1 and the protective plate are connected to the second curable resin composition 12 containing the (meth) acrylate (A) and the photopolymerization initiator (B) described above. In such a manner, coating is performed on the sealing body 23 of the liquid crystal display unit 1 so as to surround the outer peripheral side surface portion of the protective plate.
  • the second curable resin composition 12 may be applied to the outer peripheral side surface portion of the protective plate 2, and as a result, the liquid crystal display unit 1. And the protective plate 2 should just be connected.
  • coating of the liquid crystal display unit 1 are 2nd curable resin composition on the outer peripheral side part of the protection board 2. If the thing is apply
  • the application method include a dispensing method.
  • the first curable resin composition and the second curable resin composition applied to the surface of the liquid crystal display unit 1 and the sealing body 23 or the casing 26 may be the same or different curable resin compositions. You may use things.
  • coating of the 2nd curable resin composition 12 is formed in the rectangular frame shape so that the outer peripheral side part of the protection board 2 may be followed. Moreover, you may apply
  • the coating thickness of the second curable resin composition 12 may be sufficient to connect the liquid crystal display unit and the protective plate, but is thicker than the thickness of the first curable resin composition 11 to be formed. Become.
  • the thickness of the first curable resin composition 11 to be formed is preferably 0.01 to 10 mm thick, more preferably 0.1 to 5 mm thick, and more preferably 0.5 to 3 mm thick.
  • the storage rigidity at 25 ° C. at the time of curing in the second curable resin composition 12 is preferably larger than the storage rigidity at 25 ° C. of the cured product layer of the first curable resin composition 11.
  • the liquid crystal display unit 1 and the protective plate 2 are When connecting, since it is strong against deformation due to external pressure and can be connected more firmly, the influence on the gap thickness of the first curable resin layer can be reduced.
  • the second curable resin composition 12 may be a photocurable resin composition or a thermosetting resin composition.
  • the photocurable resin composition containing a curable compound and a photoinitiator is preferable from the point which can be hardened
  • the ultraviolet-ray 5 is irradiated to the optical member obtained by bonding the protective plate 2 and the liquid crystal display unit 1 from the protective plate 2 side, and curable resin composition (application
  • the second curable resin composition 12 is cured to form the second cured product layer 14.
  • the dose of ultraviolet rays is preferably from about 100 ⁇ 4000mJ / cm 2 in accumulated light quantity, particularly preferably from 200 ⁇ 3000mJ / cm 2 or so, more highly preferably 1500 ⁇ 3000mJ / cm 2.
  • the light source used for curing by irradiation with ultraviolet to near ultraviolet light may be any lamp as long as it is a lamp that emits ultraviolet to near ultraviolet light.
  • a low-pressure, high-pressure or ultrahigh-pressure mercury lamp, metal halide lamp, (pulse) xenon lamp, LED lamp, or electrodeless lamp may be used. In this way, the image display device shown in FIG. 7 can be obtained.
  • optical member that can be manufactured in the above embodiment including the liquid crystal display unit will be described below.
  • the optical substrate is an optical substrate, and the optical substrate bonded thereto is at least one display body unit selected from the group consisting of a liquid crystal display unit, a plasma display unit, and an organic EL unit.
  • One optical substrate is a protective plate having a light-shielding portion, and another optical substrate bonded thereto is a touch panel or a display unit having a touch panel, and at least two optical substrates are bonded.
  • a mode in which the optical member is a touch panel having a protective plate having a light shielding portion or a display unit having the same.
  • the curable resin composition is applied to either the surface of the protective plate having the light shielding portion provided with the light shielding portion, the touch surface of the touch panel, or both of them. Is preferred.
  • One optical substrate is an optical substrate having a light-shielding portion, the other optical substrate bonded to it is a display unit, and an optical member having at least two optical substrates bonded thereto
  • the aspect which is a display body unit which has an optical base material which has a light-shielding part.
  • the curable resin composition is applied to either the surface of the optical substrate having the light shielding portion on the side where the light shielding portion is provided, the display surface of the display unit, or both of them. It is preferable to apply an object.
  • the optical substrate having a light shielding part include a display screen protective plate having a light shielding part, or a touch panel provided with a protective plate having a light shielding part.
  • the optical substrate having the light-shielding portion is a protective plate for a display screen having the light-shielding portion
  • the surface of the optical substrate having the light-shielding portion is provided on the side on which the light-shielding portion is provided. It is the surface on the side where the part is provided.
  • the optical substrate having the light shielding part is a touch panel having a protective plate having the light shielding part
  • the protective plate having the light shielding part is bonded to the touch surface of the touch panel because the surface having the light shielding part is bonded.
  • the surface on the side where the light-shielding part of the optical base material having a portion is provided means the base material surface of the touch panel opposite to the touch surface of the touch panel.
  • the light-shielding part of the optical base material having the light-shielding part may be provided on any of the optical base materials, but is usually formed in a frame shape around the optical base material in the form of a transparent plate or sheet, and the width is The thickness is preferably about 0.5 to 10 mm, more preferably about 1 to 8 mm, and still more preferably about 2 to 8 mm.
  • the curable resin composition that can be used as the first curable resin composition 11 or the second curable resin composition 12 used in the method of the present invention will be described.
  • the curable resin composition of the present invention preferably contains (meth) acrylate (A) and a photopolymerization initiator (B).
  • the other component which can be added to the curable resin composition used for optics as an arbitrary component can be contained.
  • the phrase “can be added to the curable resin composition used for optics” means that an additive that lowers the transparency of the cured product to the extent that it cannot be used for optics is not included.
  • a preferable average transmittance of the sheet with light having a wavelength of 400 to 800 nm is at least It is preferably 90% or more.
  • a suitable composition ratio of the curable resin composition is such that (meth) acrylate (A) is 25 to 90% by weight and the photopolymerization initiator (B) is 0.2% with respect to the total amount of the curable resin composition. ⁇ 5% by weight, other components are the balance.
  • any commonly used photopolymerization initiator can be used as the photopolymerization initiator (B).
  • the (meth) acrylate (A) in the curable resin composition of the present invention is not particularly limited, but urethane (meth) acrylate, (meth) acrylate having a polyisoprene skeleton, (meth) acrylate having a polybutadiene skeleton, ( It is preferable to use any selected from the group consisting of (meth) acrylate monomers. More preferably, it is an embodiment containing both (i) at least one of urethane (meth) acrylate or (meth) acrylate having a polyisoprene skeleton and (ii) (meth) acrylate monomer.
  • “(meth) acrylate” means either one or both of methacrylate and acrylate. The same applies to “(meth) acrylic acid” and the like.
  • the urethane (meth) acrylate is obtained by reacting polyhydric alcohol, polyisocyanate and hydroxyl group-containing (meth) acrylate.
  • polyhydric alcohol examples have 1 to 10 carbon atoms such as neopentyl glycol, 3-methyl-1,5-pentanediol, ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol, etc.
  • Triols such as alkylene glycol, trimethylolpropane, pentaerythritol, alcohols having a cyclic skeleton such as tricyclodecane dimethylol, bis- [hydroxymethyl] -cyclohexane, and the like; , Phthalic acid, hexahydrophthalic anhydride, terephthalic acid, adipic acid, azelaic acid, tetrahydrophthalic anhydride, etc.) polyester polyol obtained by reaction with polyhydric alcohol and ⁇ -caprolactone Tone alcohol, polycarbonate polyol (for example, polycarbonate diol obtained by reaction of 1,6-hexanediol and diphenyl carbonate), polyether polyol (for example, polyethylene glycol, polypropylene glycol, polytetramethylene glycol, ethylene oxide modified bisphenol A, etc.) And polyolefin polyols such as hydrogenated polybutadiene diol.
  • the polyhydric alcohol is preferably polypropylene glycol or hydrogenated polybutadiene diol.
  • polypropylene glycol having a weight average molecular weight of 2000 or more and water.
  • An added polybutadiene diol is particularly preferred.
  • the upper limit of the weight average molecular weight at this time is not particularly limited, but is preferably 10,000 or less, and more preferably 5000 or less.
  • the hydrogenated polybutadiene polyol any hydrogenated reduction product of a general polybutadiene polyol can be used. Particularly, for optical applications, those having few residual double bonds are preferable, and the iodine value is particularly preferably 20 or less. preferable.
  • the molecular weight generally available molecular weight distributions can be used, but those having a molecular weight of 500 to 3000 are particularly preferred when a balance between flexibility and curability is achieved.
  • organic polyisocyanate examples include isophorone diisocyanate, hexamethylene diisocyanate, tolylene diisocyanate, xylene diisocyanate, diphenylmethane-4,4'-diisocyanate, and dicyclopentanyl isocyanate.
  • the hydroxyl group-containing (meth) acrylate is a compound having at least one hydroxyl group and one (meth) acrylate in one molecule.
  • 2-hydroxyethyl (meth) acrylate is particularly preferred from the viewpoint of excellent curability and flexibility.
  • a polymerizable compound may be added during the reaction.
  • the reaction for obtaining the urethane (meth) acrylate is performed, for example, as follows. That is, the polyhydric alcohol is mixed with an organic polyisocyanate per equivalent of the hydroxyl group so that the isocyanate group is preferably 1.1 to 2.0 equivalent, more preferably 1.1 to 1.5 equivalent. Is preferably reacted at 70 to 90 ° C. to synthesize a urethane oligomer (first reaction). Next, the hydroxy (meth) acrylate compound is mixed so that the hydroxyl group is preferably 1 to 1.5 equivalents per equivalent of the isocyanate group of the urethane oligomer, and reacted at 70 to 90 ° C. to react with the target urethane (meth). ) Acrylate can be obtained (second reaction).
  • the first reaction can be carried out without a solvent, but it is preferably carried out in a solvent having a high viscosity of the product and having no alcoholic hydroxyl group or a polymerizable compound in order to improve workability.
  • a solvent having a high viscosity of the product and having no alcoholic hydroxyl group or a polymerizable compound in order to improve workability.
  • the solvent include ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone, aromatic hydrocarbons such as benzene, toluene, xylene, and tetramethylbenzene, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, and dipropylene glycol.
  • Glycol ethers such as dimethyl ether, dipropylene glycol diethyl ether, triethylene glycol dimethyl ether, triethylene glycol diethyl ether, ethyl acetate, butyl acetate, methyl cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, carbitol acetate, propylene glycol monomethyl ether acetate , Propylene glycol monoethyl ether acetate, Propylene glycol monomethyl ether acetate, esters such as dialkyl glutarate, dialkyl succinate, dialkyl adipate, cyclic esters such as ⁇ -butyrolactone, petroleum solvents such as petroleum ether, petroleum naphtha, hydrogenated petroleum naphtha, solvent naphtha, etc. Can be carried out alone or in a mixed organic solvent.
  • the reaction temperature is usually in the range of 30 to 150 ° C, preferably 50 to 100 ° C.
  • the end point of the reaction is confirmed by a decrease in the amount of isocyanate.
  • a catalyst may be added for the purpose of shortening the reaction time.
  • this catalyst either a basic catalyst or an acidic catalyst is used.
  • the basic catalyst include amines such as pyridine, pyrrole, triethylamine, diethylamine, dibutylamine and ammonia, and phosphines such as tributylphosphine and triphenylphosphine.
  • acidic catalysts examples include copper naphthenate, cobalt naphthenate, zinc naphthenate, tributoxyaluminum, titanium tetraisopropoxide, zirconium tetrabutoxide, aluminum chloride, tin octylate, octyltin trilaurate, dibutyltin dilaurate, Mention may be made of Lewis acid catalysts such as octyltin diacetate. The amount of these catalysts added is usually 0.1 to 1 part by weight based on 100 parts by weight of the total weight of the diol compound (polyhydric alcohol + hydroxyl group-containing (meth) acrylate) and polyisocyanate compound.
  • the urethane (meth) acrylate can be obtained by reacting (second reaction) a (meth) acrylate compound having at least one hydroxyl group with respect to the remaining isocyanate group after the first reaction.
  • the second reaction is charged in an equivalent relationship such that the isocyanate group of the intermediate obtained after the first reaction is eliminated.
  • the OH group of the (meth) acrylate compound (C) having at least one hydroxyl group is 1.0 to 3.3 mol per 1.0 mol of the NCO group of the intermediate obtained after the first reaction.
  • the amount is 0 mol, more preferably 1.0 to 2.0 mol.
  • the second reaction can also be carried out in the absence of a solvent, but it is preferably carried out in the above-mentioned solvent and / or polymerizable compound in order to improve the workability because the product has a high viscosity.
  • the reaction temperature is usually in the range of 30 to 150 ° C, preferably 50 to 100 ° C.
  • the end point of the reaction is confirmed by a decrease in the amount of isocyanate.
  • the aforementioned catalyst may be added for the purpose of shortening the reaction time.
  • a polymerization inhibitor such as 4-methoxyphenol is already added to the acrylate compound used as a raw material, but a polymerization inhibitor may be added again during the reaction.
  • examples of such polymerization inhibitors include hydroquinone, 4-methoxyphenol, 2,4-dimethyl-6-t-butylphenol, 2,6-di-t-butyl-4-cresol, 3-hydroxythiophenol, Examples include p-benzoquinone, 2,5-dihydroxy-p-benzoquinone, and phenothiazine. The amount used is 0.01 to 1% by weight based on the reaction raw material mixture.
  • the weight average molecular weight of the urethane (meth) acrylate is preferably about 7000 to 25000, and more preferably 10,000 to 20000. When the weight average molecular weight is less than 7000, shrinkage tends to increase, and when the weight average molecular weight is greater than 25000, curability tends to be poor.
  • urethane (meth) acrylates can be used alone or in admixture of two or more.
  • the weight ratio of urethane (meth) acrylate in the photocurable transparent adhesive composition of the present invention is usually preferably 20 to 80% by weight, more preferably 30 to 70% by weight.
  • the (meth) acrylate having the polyisoprene skeleton has a (meth) acryloyl group at the terminal or side chain of the polyisoprene molecule.
  • a (meth) acrylate having a polyisoprene skeleton can be obtained as “UC-203” (manufactured by Kuraray Co., Ltd.).
  • the (meth) acrylate having a polyisoprene skeleton preferably has a polystyrene-equivalent number average molecular weight of 1,000 to 50,000, more preferably about 25,000 to 45,000.
  • the weight ratio of the (meth) acrylate having a polyisoprene skeleton in the photocurable transparent adhesive composition of the present invention is usually preferably 20 to 80% by weight, more preferably 30 to 70% by weight.
  • the (meth) acrylate having a polybutadiene skeleton has a (meth) acryloyl group at the terminal or side chain of the polybutadiene molecule.
  • the (meth) acrylates having a polybutadiene skeleton are "TEAI-1000 (Nippon Soda Co., Ltd.)", “TE-2000 (Nippon Soda Co., Ltd.)", “EMA-3000 (Nippon Soda Co., Ltd.)” Manufactured by Kogyo Co., Ltd.).
  • the (meth) acrylate having a polybutadiene skeleton preferably has a polystyrene-equivalent number average molecular weight of 1,000 to 30,000, more preferably about 1,000 to 10,000.
  • the (meth) acrylate monomer a (meth) acrylate having one (meth) acryloyl group in the molecule can be preferably used.
  • the (meth) acrylate monomer indicates (meth) acrylate excluding the urethane (meth) acrylate, the following epoxy (meth) acrylate, and the (meth) acrylate having the polyisoprene skeleton.
  • the (meth) acrylate having one (meth) acryloyl group in the molecule include isooctyl (meth) acrylate, isoamyl (meth) acrylate, lauryl (meth) acrylate, isodecyl (meth) acrylate, stearyl ( Alkyl (meth) acrylates having 5 to 20 carbon atoms such as (meth) acrylate, isostearyl (meth) acrylate, cetyl (meth) acrylate, isomyristyl (meth) acrylate, tridecyl (meth) acrylate, benzyl (meth) acrylate, tetrahydro Furfuryl (meth) acrylate, acryloylmorpholine, phenylglycidyl (meth) acrylate, tricyclodecane (meth) acrylate, dicyclopentenyl acrylate, dicyclopentenyloxyeth
  • alkyl (meth) acrylates having 10 to 20 carbon atoms 2-ethylhexyl carbitol acrylate, acryloylmorpholine, 4-hydroxybutyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, isostearyl (meth) acrylate, dicyclo Pentenyloxyethyl (meth) acrylate and polypropylene oxide-modified nonylphenyl (meth) acrylate are preferred.
  • alkyl (meth) acrylate having 10 to 20 carbon atoms, dicyclopentenyloxyethyl (meth) Preferred are acrylate, polypropylene oxide-modified nonylphenyl (meth) acrylate, and tetrahydrofurfuryl (meth) acrylate.
  • an alkyl (meth) acrylate having 1 to 5 carbon atoms having a hydroxyl group and acryloylmorpholine are preferable, and acryloylmorpholine is particularly preferable.
  • composition of the present invention can contain (meth) acrylates other than (meth) acrylate having one (meth) acryloyl group as long as the characteristics of the present invention are not impaired.
  • Trimethylol C2-C10 alkanes such as caprolactone-modified hydroxypivalic acid neopentyl glycol di (meth) acrylate and ethylene oxide-modified phosphoric acid di (meth) acrylate
  • Tri (meth) acrylate trimethylolpropane polyethoxytri (me
  • these (meth) acrylate monomer components can be used 1 type or in mixture of 2 or more types by arbitrary ratios.
  • the weight ratio of the (meth) acrylate monomer in the photocurable transparent adhesive composition of the present invention is usually preferably 5 to 70% by weight, more preferably 10 to 50% by weight. If it is less than 5% by weight, the curability tends to be poor, and if it is more than 70% by weight, the shrinkage tends to increase.
  • both (i) urethane (meth) acrylate or (meth) acrylate having a polyisoprene skeleton and (ii) (meth) acrylate monomer in the curable resin composition The total content of both i) and (ii) is usually preferably 25 to 90% by weight, more preferably 40 to 90% by weight, still more preferably 40 to 80% by weight, based on the total amount of the resin composition. It is.
  • epoxy (meth) acrylate can be used as long as the characteristics of the present invention are not impaired.
  • Epoxy (meth) acrylate has a function of improving curability and improving the hardness and curing speed of a cured product. Any epoxy (meth) acrylate can be used as long as it is obtained by reacting a glycidyl ether type epoxy compound with (meth) acrylic acid, and preferably used epoxy (meth) acrylate.
  • Examples of the glycidyl ether type epoxy compound to be obtained include diglycidyl ether of bisphenol A or its alkylene oxide adduct, diglycidyl ether of bisphenol F or its alkylene oxide adduct, diglycidyl of hydrogenated bisphenol A or its alkylene oxide adduct.
  • Diglycidyl ether ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether of ether, hydrogenated bisphenol F or its alkylene oxide adduct Neopentyl glycol diglycidyl ether, butanediol diglycidyl ether hexanediol diglycidyl ether to, cyclohexanedimethanol diglycidyl ether, and polypropylene glycol diglycidyl ether.
  • Epoxy (meth) acrylate is obtained by reacting these glycidyl ether type epoxy compounds with (meth) acrylic acid under the following conditions.
  • (Meth) acrylic acid is reacted at a ratio of 0.9 to 1.5 mol, more preferably 0.95 to 1.1 mol, per 1 equivalent of epoxy group of the glycidyl ether type epoxy compound.
  • the reaction temperature is preferably 80 to 120 ° C., and the reaction time is about 10 to 35 hours.
  • a catalyst such as triphenylphosphine, TAP, triethanolamine, or tetraethylammonium chloride.
  • paramethoxyphenol, methylhydroquinone or the like can be used as a polymerization inhibitor.
  • An epoxy (meth) acrylate that can be suitably used in the present invention is a bisphenol A type epoxy (meth) acrylate obtained from a bisphenol A type epoxy compound.
  • the weight average molecular weight of the epoxy (meth) acrylate is preferably 500 to 10,000.
  • the weight ratio of the epoxy (meth) acrylate in the curable resin composition of the present invention is usually 1 to 80% by weight, preferably 5 to 30% by weight.
  • the content ratio of (meth) acrylate (A) in the curable resin composition of the present invention is preferably 25 to 90% by weight, more preferably 40 to 90% by weight, based on the total amount of the curable resin composition. More preferably, it is 40 to 80% by weight.
  • the (meth) acrylate (A) is selected from the group consisting of the urethane (meth) acrylate, the (meth) acrylate having the polyisoprene skeleton, and the (meth) acrylate monomer. It is preferable to contain at least one.
  • the content of the urethane (meth) acrylate is preferably 20 to 80% by weight, more preferably 30 to 70% by weight, and the content of the (meth) acrylate having a polyisoprene skeleton is preferably 20 to 80%.
  • the content ratio of the (meth) acrylate monomer is preferably 5 to 70% by weight, more preferably 10 to 50% by weight.
  • the (meth) acrylate (A) contains the urethane (meth) acrylate or the (meth) acrylate having a polyisoprene skeleton, and the content ratio is 20 to 80% by weight, preferably Is more preferably 30 to 70% by weight and contains a (meth) acrylate monomer, and its content is 5 to 70% by weight, preferably 10 to 50% by weight.
  • the photopolymerization initiator (B) contained in the composition of the present invention is not particularly limited, and examples thereof include 2,4,6-trimethylbenzoyldiphenylphosphine oxide and 2,4,6-trimethylbenzoylphenylethoxyphosphine.
  • Fin oxide bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide, bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide, 1-hydroxycyclohexyl phenyl ketone ( Irgacure (trade name) 184; manufactured by BASF), 2-hydroxy-2-methyl- [4- (1-methylvinyl) phenyl] propanol oligomer (Esacure (trade name) ONE; manufactured by Lambarti), 1- [4- (2-Hydroxyethoxy) -phenyl] -2 Hydroxy-2-methyl-1-propan-1-one (Irgacure 2959; manufactured by BASF), 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] -phenyl ⁇ -2-Methyl-propan-1-one (Irgacure 127; manufactured by BASF
  • the photopolymerization initiator (B) has a molar extinction coefficient at 302 nm or 313 nm measured in acetonitrile or methanol of 300 ml / (g ⁇ cm) or more and a molar extinction coefficient at 365 nm of 100 ml. It is preferable to use a photopolymerization initiator that is not more than / (g ⁇ cm). By using such a photopolymerization initiator, it is possible to contribute to an improvement in adhesive strength.
  • these photopolymerization initiators (B) can be used alone or in admixture of two or more at any ratio.
  • the weight ratio of the photopolymerization initiator (B) in the photocurable resin composition of the present invention is usually preferably 0.2 to 5% by weight, more preferably 0.3 to 3% by weight. When it is more than 5% by weight, when obtaining a cured product layer having a cured part and an uncured part on the side opposite to the optical substrate side, the uncured part cannot be formed or the transparency of the resin cured product layer is low. It may get worse.
  • the curable resin composition of the present invention includes, as other components, a photopolymerization initiation assistant described below, a general formula (1) described later.
  • the compound which has the structure shown by this, the softening component mentioned later, the additive mentioned later, etc. can be included.
  • the content ratio of the other components with respect to the total amount of the curable resin composition of the present invention is a balance obtained by subtracting the total amount of the (meth) acrylate (A) and the photopolymerization initiator (B) from the total amount.
  • the total amount of the other components is preferably 0 to 74% by weight, more preferably about 5 to 70% by weight, based on the total amount of the curable resin composition of the present invention.
  • amines that can serve as photopolymerization initiation assistants can be used in combination with the above photopolymerization initiator.
  • examples of amines that can be used include benzoic acid 2-dimethylaminoethyl ester, dimethylaminoacetophenone, p-dimethylaminobenzoic acid ethyl ester, and p-dimethylaminobenzoic acid isoamyl ester.
  • the content in the adhesive resin composition of the present invention is usually preferably 0.005 to 5% by weight, more preferably 0.01 to 3% by weight. is there.
  • the curable resin composition of the present invention can contain a compound having a structure represented by the general formula (1) as necessary.
  • n represents an integer of 0 to 40
  • m represents an integer of 10 to 50.
  • R 1 and R 2 may be the same or different.
  • R 1 and R 2 have 1 to 18 carbon atoms.
  • the compound having the structure represented by the general formula (1) can be obtained, for example, as Unisafe (trade name) PKA-5017 (polyethylene glycol-polypropylene glycol allyl butyl ether) manufactured by NOF Corporation.
  • the weight ratio in the curable resin composition when using the compound having the structure represented by the general formula (1) is usually preferably 10 to 80% by weight, more preferably 10 to 70% by weight.
  • a softening component can be used as necessary.
  • the softening component that can be used include the polymer or oligomer excluding the (meth) acrylate and the compound having the structure represented by the general formula (1), phthalates, phosphates, glycol esters, Examples thereof include acid esters, aliphatic dibasic acid esters, fatty acid esters, epoxy plasticizers, castor oils, and terpene hydrogenated resins.
  • oligomer and polymer examples include an oligomer or a polymer having a polyisoprene skeleton, a polybutadiene skeleton, a polybutene skeleton or a xylene skeleton, and an esterified product thereof. In some cases, a polymer or an oligomer having a polybutadiene skeleton and an ester thereof. It is preferred to use a compound.
  • polystyrene resin composition examples include butadiene homopolymer, epoxy-modified polybutadiene, butadiene-styrene random copolymer, maleic acid-modified polybutadiene, and terminal hydroxyl group-modified liquid polybutadiene or liquid hydrogenated polybutadiene. It is done. Further, in the softening component, the above-mentioned softening components can be mixed and used.
  • the weight ratio of the softening component in the curable resin composition is usually preferably 10 to 80% by weight, more preferably 10 to 70% by weight.
  • an antioxidant an organic solvent, a silane coupling agent, a polymerization inhibitor, a leveling agent, an antistatic agent, a surface lubricant, a fluorescent whitening agent, and a light stabilizer are optionally added.
  • antioxidants include, for example, BHT, 2,4-bis- (n-octylthio) -6- (4-hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine Pentaerythrityl tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 2,2-thio-diethylenebis [3- (3,5-di-t-butyl- 4-hydroxyphenyl) propionate], triethylene glycol-bis [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], 1,6-hexanediol-bis [3- (3-t -Butyl-5-methyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate, , N-hexamethylenebis (3,5-di-di
  • organic solvent examples include alcohols such as methanol, ethanol and isopropyl alcohol, dimethyl sulfone, dimethyl sulfoxide, tetrahydrofuran, dioxane, toluene, xylene and the like.
  • silane coupling agent examples include, for example, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxy) (Cyclohexyl) ethyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, ⁇ -mercapropropyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3 -Aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, vinyltrimethoxysilane, N- (2- (vinylbenzylamino) ethyl) 3-aminopropyltrimethoxysilane hydrochloride, 3-methacryloxypropyltri
  • polymerization inhibitor examples include paramethoxyphenol and methylhydroquinone.
  • the light stabilizer include, for example, 1,2,2,6,6-pentamethyl-4-piperidyl alcohol, 2,2,6,6-tetramethyl-4-piperidyl alcohol, 1,2,2, 6,6-pentamethyl-4-piperidyl (meth) acrylate (LA-82, manufactured by ADEKA Corporation), tetrakis (1,2,2,6,6-pentamethyl-4-piperidyl) -1,2,3 4-butanetetracarboxylate, tetrakis (2,2,6,6-totramethyl-4-piperidyl) -1,2,3,4-butanetetracarboxylate, 1,2,3,4-butanetetracarboxylic acid 1,2,2,6,6-pentamethyl-4-piperidinol and 3,9-bis (2-hydroxy-1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro [5.5 Mixed esterified product with undecane, bis (2,2,6,6-tetramethyl-4-piperidy
  • the filler include, for example, crystalline silica, fused silica, alumina, zircon, calcium silicate, calcium carbonate, silicon carbide, silicon nitride, boron nitride, zirconia, fosterite, steatite, spinel, titania, talc and the like.
  • examples thereof include powder or beads obtained by spheroidizing these.
  • the weight ratio of various additives in the photocurable transparent adhesive composition is preferably 0.01 to 3% by weight, more preferably 0.01 to 1% by weight, still more preferably 0.02 to 0.5% by weight. %.
  • the curable resin composition of the present invention can be obtained by mixing and dissolving the aforementioned components at room temperature to 80 ° C. If necessary, impurities may be removed by an operation such as filtration.
  • impurities may be removed by an operation such as filtration.
  • the cure shrinkage of the cured product of the curable resin composition of the present invention is preferably 3.0% or less, and particularly preferably 2.0% or less.
  • the transmittance of the cured product of the curable resin composition of the present invention at 400 nm to 800 nm is preferably 90% or more.
  • the transmittance at 400 to 450 nm is preferably 90% or more.
  • the first curable resin composition 11 or the second curable resin composition 12 of the present invention (I) urethane (meth) acrylate or (meth) acrylate having a polyisoprene skeleton and (II) (meth) acrylate It is preferable to contain a monomer and a photopolymerization initiator. And both the 1st curable resin composition 11 and the 2nd curable resin composition 12 use the resin composition containing the said (I) component and (II) component, and obtain an image display apparatus. Is preferred.
  • the softening component as a softening agent, and it is preferable that especially the 1st curable resin composition 11 and the 2nd curable resin composition 12 contain the softening component.
  • the softening components terpene resins (particularly solid terpene resins) are preferably used.
  • the curable resin composition containing the (meth) acrylate (A) and the photopolymerization initiator (B) used in the production method of the present invention are described below.
  • “Wt%” in the content of each component indicates a content ratio with respect to the total amount of the curable resin composition of the present invention.
  • the (meth) acrylate (A) is at least one (meth) acrylate selected from the group consisting of urethane (meth) acrylate, (meth) acrylate having a polyisoprene skeleton, and a (meth) acrylate monomer.
  • (A2) As the (meth) acrylate (A), (I) at least one of urethane (meth) acrylate or (meth) acrylate having a polyisoprene skeleton, and (Ii) (meth) acrylate monomers,
  • (A3) As the (meth) acrylate (A), (I) urethane (meth) acrylate obtained by reaction of poly C2-C4 alkylene glycol, diisocyanate and hydroxy C2-C4 alkyl (meth) acrylate, and (Ii) (meth) acrylate monomers,
  • (A4) The curable resin composition according to any one of (A1) to (A3) above, wherein the urethane (meth) acrylate has a weight average molecular weight of 7000 to 25000.
  • (A5) In the curable resin composition containing the (meth) acrylate (A) and the photopolymerization initiator (B), as the photopolymerization initiator (B), a curable resin composition containing an acylphosphine oxide compound, or The curable resin composition according to any one of the above (A1) to (A4), which contains an acylphosphine oxide compound as a photopolymerization initiator (B).
  • Acylphosphine oxide compounds are 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2,4,6-trimethylbenzoylphenylethoxyphosphine oxide, bis (2,4,6-trimethylbenzoyl) -phenylphosphine oxide.
  • the curable resin composition according to (A5) which is at least one compound selected from the group consisting of bis (2,6-dimethoxybenzoyl) -2,4,4-trimethyl-pentylphosphine oxide.
  • (A9) (Meth) acrylate (A) includes (i) at least one of urethane (meth) acrylate or polyisoprene (meth) acrylate in an amount of 20 to 80% by weight and (ii) (meth) acrylate monomer in an amount of 5 to 70% by weight,
  • (A10) The curable resin composition according to any one of the above (A7) to (A9), which contains 10 to 80% by weight of the compound represented by the general formula (1) as another component.
  • the cured product sheet of the curable resin composition having a thickness of 200 ⁇ m has an average transmittance of at least 90% in a wavelength region of 400 to 450 nm and an average transmittance of at least a wavelength region of 400 to 800 nm. 90% of a curable resin composition containing (meth) acrylate (A) and a photopolymerization initiator (B), or the curable resin according to any one of (A1) to (A11) above Composition.
  • the curable resin composition of the present invention can be suitably used as an adhesive for producing an optical member by laminating a plurality of optical substrates by [Step A] to [Step C-III].
  • the optical substrate used in the method for producing an optical member of the present invention include a protective plate, a transparent plate, a sheet, a touch panel, and a display unit.
  • the “optical substrate” means both an optical substrate having no light shielding part on the surface and an optical substrate having a light shielding part on the surface.
  • it is preferable that at least one of a plurality of optical substrates used is an optical substrate having a light shielding portion.
  • the position of the light shielding part in the optical substrate having the light shielding part is not particularly limited.
  • a band-shaped light shielding portion having a width of 0.05 to 20 mm, preferably about 0.05 to 10 mm, more preferably about 0.1 to 6 mm is formed in the peripheral portion of the optical substrate.
  • the light-shielding portion on the optical substrate can be formed by attaching a tape, applying a coating or printing.
  • Various materials can be used as the material of the optical substrate used in the present invention. Specifically, resins such as PET, PC, PMMA, a composite of PC and PMMA, glass, COC, COP, plastic (such as acrylic resin), and the like can be given.
  • an optical substrate used in the present invention for example, a transparent plate or sheet, a sheet or transparent plate obtained by laminating a plurality of films or sheets such as polarizing plates, a non-laminated sheet or transparent plate, and a transparent made from inorganic glass Plates (inorganic glass plates and processed products thereof, such as lenses, prisms, ITO glass) and the like can be used.
  • the optical substrate used in the present invention is a laminate composed of a plurality of functional plates or sheets (hereinafter referred to as “functional laminate”) such as a touch panel (touch panel input sensor) or the following display unit in addition to the polarizing plate described above. Also called “body”).
  • Examples of the sheet that can be used as the optical substrate used in the present invention include an icon sheet, a decorative sheet, and a protective sheet.
  • Examples of the plate (transparent plate) that can be used in the method for producing an optical member of the present invention include a decorative plate and a protective plate.
  • materials for these sheets or plates those listed as materials for transparent plates can be applied.
  • Examples of the material of the touch panel surface that can be used as the optical substrate used in the present invention include glass, PET, PC, PMMA, a composite of PC and PMMA, COC, and COP.
  • the thickness of a plate-like or sheet-like optical substrate such as a transparent plate or a sheet is not particularly limited, and is usually about 5 ⁇ m to 5 cm, preferably about 10 ⁇ m to 10 mm, more preferably about 50 ⁇ m to 3 mm. Is the thickness.
  • a plate-shaped or sheet-shaped transparent optical substrate having a light-shielding portion and the functional laminate are a cured product of the curable resin composition of the present invention.
  • a bonded optical member can be exemplified.
  • a display unit with an optical functional material by using a display unit such as a liquid crystal display device as one of optical substrates and an optical functional material as another optical substrate ( Hereinafter, it is also referred to as a display panel).
  • the display unit include display devices such as LCD, EL display, EL illumination, electronic paper, and plasma display in which a polarizing plate is attached to glass.
  • the optical functional material include transparent plastic plates such as acrylic plates, PC plates, PET plates, and PEN plates, tempered glass, and touch panel input sensors.
  • the refractive index of the cured product is 1.45 to 1.55 in order to improve the visibility because the visibility of the display image is further improved.
  • the difference in refractive index from the base material used as the optical base material can be reduced, and the light loss can be reduced by suppressing the irregular reflection of light.
  • Preferred embodiments of the optical member obtained by the production method of the present invention include the following (i) to (vii).
  • An optical base selected from the group consisting of a transparent glass substrate having a light shielding part, a transparent resin substrate having a light shielding part, and a glass substrate on which a light shielding material and a transparent electrode are formed, as the optical base material having the light shielding part.
  • the optical member according to (i), which is a material and the functional laminate is a display unit or a touch panel.
  • a touch panel or touch panel input sensor in which a plate-shaped or sheet-shaped optical substrate having a light-shielding portion is bonded to the surface on the touch surface side of the touch panel using a cured product of the curable resin composition of the present invention.
  • V A display panel in which a plate-like or sheet-like optical substrate having a light-shielding portion is bonded to the display screen of the display unit using the cured product of the curable resin composition of the present invention.
  • the optical member of the present invention is bonded by bonding the plurality of optical substrates selected from the above optical substrates by the method described in Steps A to C-III. Is obtained.
  • the curable resin composition may be applied to only one of the surfaces facing each other through the cured product layer in the two optical substrates to be bonded, or may be applied to both surfaces.
  • the functional laminate is a touch panel or a display unit
  • Step A any one surface of a protective plate having a light shielding portion, preferably a light shielding portion is provided.
  • the resin composition may be applied to only one of the touched surface and the touch surface of the touch panel or the display surface of the display unit, or may be applied to both of them. Further, in the case of the optical member (vi) above in which a protective plate or a touch panel for protecting the display screen of the display body unit is bonded to the display body unit, in step A, The resin composition may be applied to only one of the base material surface opposite to the touch surface of the touch panel and the display surface of the display unit, or may be applied to both of them.
  • the optical member including the display unit obtained by the manufacturing method of the present invention and the optical base material having the light shielding portion can be incorporated into an electronic device such as a television, a small game machine, a mobile phone, and a personal computer.
  • curable resin composition 16 parts by weight of urethane acrylate (hydrogenated polybutadiene diol (molecular weight 3000), isophorone diisocyanate, 2-hydroxyethyl acrylate, 3 components (molar ratio 1: 1.2: 2)), GI-2000 (both end hydroxyl groups) 18 parts by weight of hydrogenated polybutadiene (manufactured by Nippon Soda Co., Ltd.), 13 parts of Nisseki Polybutene LV-100 (liquid polybutene, JX Nippon Steel & Nisseki Energy Co., Ltd.) 16 parts of modified hydrogenated terpene resin (manufactured by Yasuhara Chemical Co., Ltd.), 11 parts by weight of LA (lauryl acrylate, Osaka Organic Chemical Co., Ltd.), S-1800A (isostearyl acrylate, Shin-Nakamura Chemical Co., Ltd.) 25 parts, speed cure (
  • Example 1 As shown in FIG. 1A, the first curable resin composition A is also applied to the surface of the surface of the protective plate 2 having the light shielding part 4 on which the light shielding part 4 is formed and also on the light shielding part. It was applied with a thickness of 200 ⁇ m so that the curable resin composition A was laminated. Thereafter, using an electrodeless ultraviolet lamp (D bulb, manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.), the resin was temporarily cured by irradiating ultraviolet rays 5 with an integrated light quantity of 100 mJ / cm 2 from the atmosphere side.
  • D bulb manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.
  • the 2nd curable resin composition a is integrated electrode light quantity from a protection board side using an electrodeless ultraviolet lamp (a product made by Heraeus Noblelight Fusion Ubuy Co., Ltd., D bulb).
  • an electrodeless ultraviolet lamp a product made by Heraeus Noblelight Fusion Ubuy Co., Ltd., D bulb.
  • Example 2 The cured resin layer was cured in the same manner except that the first curable resin composition applied to the protective plate was changed to B, and the optical member shown in FIG. 7 was created.
  • Example 3 The cured resin layer was cured in the same manner except that the first curable resin composition applied to the protective plate was changed to C, and the optical member shown in FIG. 7 was created.
  • Example 4 As shown in FIG. 4A, the first curable resin composition A is also applied to the surface of the surface of the protective plate 2 having the light shielding part 4 on which the light shielding part 4 is formed and also on the light shielding part. It was applied with a thickness of 200 ⁇ m so that the curable resin composition A was laminated. Thereafter, using an electrodeless ultraviolet lamp (D bulb, manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.), the resin was temporarily cured by irradiating ultraviolet rays 5 with an integrated light quantity of 100 mJ / cm 2 from the atmosphere side. Next, with the liquid crystal display unit 1 and the surface of the protective plate 2 on which the first curable resin composition A is formed facing each other, as shown in FIG.
  • D bulb manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.
  • the protective plate 2 having it was bonded.
  • the 2nd curable resin composition a was apply
  • the 1st curable resin composition A and the 2nd curable resin composition a are used for an electrodeless ultraviolet lamp (Heraeus Noblelight Fusion Ubuy company make, D bulb).
  • the optical member shown in FIG. 7 was created by curing and forming the second cured product layer 14 by irradiating ultraviolet rays 5 with an integrated light quantity of 2000 mJ / cm 2 from the protective plate side.
  • Example 5 As shown in FIG. 5A, the first curable resin composition A is also applied to the surface of the surface of the protective plate 2 having the light shielding part 4 on which the light shielding part 4 is formed and also on the light shielding part. It was applied with a thickness of 200 ⁇ m so that the curable resin composition A was laminated. Thereafter, using an electrodeless ultraviolet lamp (D bulb, manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.), the resin was temporarily cured by irradiating ultraviolet rays 5 with an integrated light quantity of 100 mJ / cm 2 from the atmosphere side. Next, with the liquid crystal display unit 1 and the surface of the protective plate 2 on which the first curable resin composition A is formed facing each other, as shown in FIG.
  • D bulb manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.
  • the 2nd curable resin composition a was apply
  • the second curable resin composition a is irradiated with ultraviolet rays 5 having an integrated light amount of 2000 mJ / cm 2 from the protective plate side using an electrodeless ultraviolet lamp (D bulbs manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.). By the thing, it hardened
  • the first curable resin composition A was applied with an integrated light quantity of 2000 mJ / from the protective plate side using an electrodeless ultraviolet lamp (D bulb, manufactured by Heraeus Noblelight Fusion Ubuy).
  • the optical member shown in FIG. 7 was created by forming the second cured product layer 14 by curing by irradiating the ultraviolet ray 5 of cm 2 .
  • the first curable resin composition A is laminated on the surface of the surface of the protective plate 2 having the light shielding part 4 where the light shielding part 4 is formed, also on the light shielding part. Thus, it apply
  • an electrodeless ultraviolet lamp D bulb, manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.
  • the first curable resin composition was irradiated by irradiating ultraviolet rays 5 with an integrated light quantity of 2000 mJ / cm 2 from the protective plate side using an electrodeless ultraviolet lamp (D bulb, manufactured by Heraeus Noblelight Fusion Ubuy Co., Ltd.).
  • the optical member shown in FIG. 7 was created by performing the main curing of the product A and the second curable resin composition a.
  • the obtained curable resin composition was fully cured, and the durometer E hardness was measured using a durometer hardness meter (type E) by a method based on JIS K7215 to evaluate flexibility. More specifically, the curable resin composition was poured into a cylindrical mold so that the film thickness became 1 cm, and the resin composition was sufficiently cured by irradiation with ultraviolet rays. The hardness of the obtained cured product was measured with a durometer hardness meter (type E). As a result, the measured value was less than 10, and the flexibility was excellent.
  • Two PET films having a thickness of 40 ⁇ m coated with a fluorine-based release agent are prepared, and the film thickness after curing of the obtained curable resin composition on one of the release agent-coated surfaces is 600 ⁇ m. It was applied as follows. Thereafter, the two PET films were bonded together so that the respective release agent application surfaces face each other. The resin composition was cured by irradiating ultraviolet rays with an integrated light amount of 2000 mJ / cm 2 through a PET film with a high-pressure mercury lamp (80 W / cm, ozone-less). Thereafter, the two PET films were peeled off to prepare a cured product for measuring the rigidity. Thereafter, the two PET films are peeled off to produce a cured product for measuring the rigidity. As for the rigidity, the rigidity can be measured in a temperature range of 20 to 40 ° C. using ARES (TA Instruments).
  • the rigidity of the first curable composition C was out of the measurable range with the apparatus because the difference between the storage rigidity and the loss modulus was large.
  • the method for producing an optical member of the present invention can provide an optical member such as a display unit that has excellent visibility and is less likely to cause ripples due to pressing.
  • the optical member obtained by the present invention can be suitably incorporated in a display device such as a liquid crystal display, a plasma display, or an organic EL display.
  • 1 liquid crystal display unit 1 liquid crystal display unit, 2 protective plate, 3 transparent substrate, 4 light shielding part, 5 ultraviolet light, 11 first curable resin composition, 12 second curable resin composition, 13 first cured product layer, 14 second cured product Layer, 21 liquid crystal display cell, 22 polarizing plate, 23 sealing body, 24 gap, 25 sealing film, 26 housing

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Abstract

L'invention concerne un procédé de fabrication d'un dispositif d'affichage d'image ayant une plaque de protection collée à une unité d'affichage à cristaux liquides équipée d'une cellule d'affichage à cristaux liquides, une plaque de polarisation, et un corps étanche ou un boîtier, le procédé mettant en œuvre : (A) une étape consistant à revêtir l'unité d'affichage à cristaux liquides ou la plaque de protection avec une première composition de résine durcissable ; (B) une étape consistant à coller l'unité d'affichage à cristaux liquides et la plaque de protection l'une avec l'autre avec la première composition de résine durcissable interposée entre ces dernières ; et (C-I) - (C-III) les étapes décrites par la suite qui suivent l'étape (B). (C-I) une étape consistant à coller l'unité d'affichage à cristaux liquides et la plaque de protection l'une avec l'autre par durcissement de la première composition de résine durcissable ; (C-II) une étape consistant à revêtir la section de surface côté périphérique externe de la plaque de protection, du corps étanche ou du boîtier avec une seconde composition de résine durcissable, de façon à relier l'unité d'affichage à cristaux liquides et la plaque de protection l'une avec l'autre ; et (C-III) une étape consistant à, après l'étape (C-II), fournir la section de surface côté périphérique externe de la plaque de protection, du corps étanche ou boîtier d'unité d'affichage à cristaux liquides avec une couche d'article durci par durcissement de la seconde couche de composition de résine durcissable.
PCT/JP2016/051357 2015-01-19 2016-01-19 Procédé de fabrication de dispositif d'affichage d'image, composition de résine durcissable à utiliser dans ce dernier, panneau tactile et dispositif d'affichage d'image Ceased WO2016117526A1 (fr)

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KR1020177020116A KR20170105523A (ko) 2015-01-19 2016-01-19 화상 표시 장치의 제조 방법, 그것에 사용하는 경화성 수지 조성물, 터치 패널 및 화상 표시 장치
CN201680006333.2A CN107209410B (zh) 2015-01-19 2016-01-19 图像显示装置的制造方法、用于该方法的固化性树脂组合物、触控面板和图像显示装置
JP2016570637A JP6633548B2 (ja) 2015-01-19 2016-01-19 画像表示装置の製造方法、それに用いる硬化性樹脂組成物、タッチパネル及び画像表示装置

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JP2019179791A (ja) * 2018-03-30 2019-10-17 ミネベアミツミ株式会社 モジュールの製造方法及び光学モジュールの製造方法
WO2021020295A1 (fr) * 2019-07-29 2021-02-04 デクセリアルズ株式会社 Procédé de production de dispositif optique

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CN110379298B (zh) * 2019-07-19 2021-06-01 深圳市华星光电半导体显示技术有限公司 框胶结构和显示面板的制作方法
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JP2008158251A (ja) * 2006-12-25 2008-07-10 Hitachi Displays Ltd 表示装置の製造方法
JP2013228748A (ja) * 2010-12-08 2013-11-07 Asahi Glass Co Ltd 表示装置
WO2013131106A1 (fr) * 2012-03-02 2013-09-06 Microsoft Corporation Support pour un dispositif d'affichage à couplage optique

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CN110111694A (zh) * 2019-05-22 2019-08-09 上海中航光电子有限公司 一种柔性显示模组及显示装置
WO2021020295A1 (fr) * 2019-07-29 2021-02-04 デクセリアルズ株式会社 Procédé de production de dispositif optique
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JP7274966B2 (ja) 2019-07-29 2023-05-17 デクセリアルズ株式会社 光学装置の製造方法

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JPWO2016117526A1 (ja) 2017-10-26
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