Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
  • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
  • G02B1/14—Protective coatings, e.g. hard coatings
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B5/00—Optical elements other than lenses
  • G02B5/30—Polarising elements
• • G—PHYSICS
  • G02—OPTICS
  • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
  • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
  • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
  • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
  • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
  • G02F1/1333—Constructional arrangements; Manufacturing methods
  • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
• • 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
  • 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
  • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
• • 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
  • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
• • G—PHYSICS
  • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
  • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
  • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
  • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
• • H—ELECTRICITY
  • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
  • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
  • H05B33/00—Electroluminescent light sources
  • H05B33/02—Details
• • H—ELECTRICITY
  • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
  • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
  • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
  • H10K59/80—Constructional details
  • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

• the present invention relates to an optical laminate, a polarizing plate, an image display device, a resistive touch panel, and a capacitive touch panel.
• glass such as chemically strengthened glass has been mainly used for applications requiring high durability such as the front side polarizing plate of an image display device, particularly the front side polarizing plate of a touch panel.
• plastic has the advantages of being lighter, less likely to break, and thinner than glass. Therefore, in recent years, the usefulness of plastic as a substitute material for glass has attracted attention in applications where glass has been mainly used.
• the use of a hard coat film having a cured layer on the support as a glass substitute material has been studied.
• the pencil hardness of the surface is regarded as important.
• Patent Document 1 describes an anti-scattering pressure-sensitive adhesive sheet in which a hard coat layer of a hard coat film having a pencil hardness of 2H or more, a base film, and an adhesive layer are laminated in this order.
• the thickness of the coat layer is 8 to 20 ⁇ m
• the thickness of the pressure-sensitive adhesive layer is 1 to 13 ⁇ m
• the storage elastic modulus of the pressure-sensitive adhesive layer at 0 ° C. is 1.0 ⁇ 10 6 to 1.0 ⁇ 10 8 Pa.
• a shatterproof adhesive sheet is described.
• Patent Document 1 describes that this anti-scattering adhesive sheet has good punching and cutting suitability while maintaining a hardness of pencil hardness H or higher, and a polyethylene terephthalate film is used as a base film.
• Patent Document 2 describes a hard coat film including a base material and a hard coat layer laminated on at least one surface of the base material, and the hard coat film has an in-plane retardation of 6000 nm.
• the first hard coat layer which is the most recent hard coat layer on the surface having a pencil hardness of 5 H or more and a pencil hardness of 5 H or more in the hard coat film on at least one surface having a diameter of 40,000 nm or less, is 30.
• a hard coat film containing a filler in a content of% by volume or more and 70% by volume or less and having a thickness of 20 ⁇ m or more and 100 ⁇ m or less is described.
• Patent Document 2 describes that the hard coat film can suppress the occurrence of color unevenness caused by providing the hard coat layer, and describes an example in which a polyethylene terephthalate film is used as a base material.
• Patent Document 3 describes a laminated body having at least a resin film and an adhesive layer arranged on one surface of the resin film. In the laminated state of the laminated body, the resin film has a surface having an adhesive layer. The surface roughness Sa of the opposite surface in a measurement field of 4 mm ⁇ 5 mm is 30 nm or less, the thickness of the adhesive layer is 100 ⁇ m or less, and the maximum value of the loss tangent at a frequency of 1 Hz is 0 ° C to ⁇ 40 ° C. A laminated body in the temperature range of 1 and having a maximum value of 1.3 or more is described. According to the laminated body described in Patent Document 3, it is described that excellent glass quality can be exhibited even when laminated on another member.
• Patent Documents 1 and 2 As a result of studies by the present inventors, a film using a polyethylene terephthalate film as a base film as described in Patent Documents 1 and 2 has a low pencil hardness as a hard coat film and is in front of a touch panel. It has been found that the hardness is insufficient for face plate applications. Further, although Patent Document 3 describes a laminate showing high pencil hardness, as a result of the examination by the present inventors, a hard coat film showing high pencil hardness is attached to an adherend such as a polarizing plate. In that case, the pencil hardness may be significantly reduced due to the bonding via the adhesive layer or the like, and it has been found that there is room for improvement.
• the present invention has an optical laminate having excellent pencil hardness as a hard coat film and also excellent in suppressing a decrease in pencil hardness caused by bonding via an adhesive layer, a polarizing plate provided with the optical laminate, and an image display device. It is an object of the present invention to provide a resistive film type touch panel and a capacitance type touch panel.
• An optical laminate having at least an adhesive layer, a support arranged on one side of the adhesive layer, and a hard coat layer arranged on the support.
• the storage elastic modulus A and the thickness B of the adhesive layer satisfy the following formula (1).
• the support is a support having a tensile elastic modulus of 4.5 GPa or more, a product of a indentation elastic modulus and a recovery rate of 3.75 or more, and a thickness of 80 ⁇ m or more.
• the hard coat layer is a hard coat layer having a indentation elastic modulus of 7 GPa or more and a thickness of 10 ⁇ m or more.
• An optical laminate in which the difference between the pencil hardness of the hard coat film composed of the support and the hard coat layer and the pencil hardness of the optical laminate is within 1H.
• the unit of the storage elastic modulus A is MPa
• the unit of the thickness B is ⁇ m.
• the optical laminate according to claim 1 wherein the support includes a triacetyl cellulose resin.
• the optical laminate according to claim 1 or 2 wherein the thickness of the support is 100 ⁇ m or more.
• the hard coat layer has a polymerizable compound 1 having a (meth) acrylic group and a polymerizable compound 2 having an epoxy group and a (meth) acrylic group in the same molecule and different from the polymerizable compound 1.
• the hard coat layer has an anti-scratch layer on the surface opposite to the support.
• This abrasion-resistant layer is formed from a curable composition for forming an abrasion-resistant layer containing a polymerizable compound having at least three (meth) acrylic groups in the same molecule and a fluorine-containing compound having a (meth) acrylic group.
• the curable composition for forming a hard coat layer contains inorganic particles modified with a (meth) acrylic group or an epoxy group, and the content of the inorganic particles in the solid content of the curable composition for forming a hard coat layer.
• ⁇ 10> The polarizing plate of ⁇ 8> or ⁇ 9>, wherein the difference between the pencil hardness of the hard coat film composed of the support and the hard coat layer and the pencil hardness of the polarizing plate is within 1H.
• ⁇ 12> The image display device according to ⁇ 11>, wherein the image display element is a liquid crystal display element.
• ⁇ 13> The image display device according to ⁇ 11> or ⁇ 12>, wherein the image display element is an organic electroluminescence display element.
• ⁇ 14> The image display device according to any one of ⁇ 11> to ⁇ 13>, wherein the image display element is an in-cell touch panel display element.
• ⁇ 15> The image display device according to any one of ⁇ 11> to ⁇ 13>, wherein the image display element is an on-cell touch panel display element.
• ⁇ 16> A resistive touch panel including the polarizing plate according to any one of ⁇ 8> to ⁇ 10>.
• ⁇ 17> A capacitive touch panel including the polarizing plate according to any one of ⁇ 8> to ⁇ 10>.
• substituents there is no particular notice when there are a plurality of substituents or linking groups (hereinafter referred to as substituents, etc.) represented by a specific code or formula, or when a plurality of substituents, etc. are specified at the same time. As long as each substituent or the like may be the same or different from each other. This also applies to the regulation of the number of substituents and the like. Further, when a plurality of substituents and the like are close to each other (particularly when they are close to each other), they may be connected to each other to form a ring unless otherwise specified.
• the ring for example, an alicyclic ring, an aromatic ring, or a heterocycle may be further condensed to form a condensed ring.
• the double bond may be any of E-type and Z-type in the molecule, or a mixture thereof.
• the indication of a compound (including a complex) is meant to include a compound in which a part of the structure is changed as long as the effect of the present invention is not impaired.
• a compound for which substitution or non-substitution is not specified may have an arbitrary substituent as long as the effect of the present invention is not impaired. This also applies to substituents and linking groups.
• the numerical range represented by using “-” in the present invention means a range including the numerical values before and after "-" as the lower limit value and the upper limit value.
• the composition is a mixture in which the component concentration is constant (each component is uniformly dispersed) and the component concentration varies within a range that does not impair the target color conversion function. Including.
• “(meth) acrylate” is used to mean including both acrylate and methacrylate. This also applies to "(meth) acrylic acid”, “(meth) acrylamide”, “(meth) acrylic group", “(meth) acryloyl group” and "(meth) acryloyloxy group”.
• the term "(meth) acrylic group” is used in the sense of including both "(meth) acryloyl group” and "(meth) acryloyloxy group”.
• each component may be used alone or in combination of two or more.
• the solid content of the composition means a component obtained by removing the solvent from the entire composition of the composition.
• the cured layer means a layer formed from a composition containing at least a curable compound and having a surface pencil hardness of 2H or more.
• Examples of the cured layer that the optical laminate of the present invention may have or may have include a hard coat layer and an abrasion resistant layer, and the hard coat layer is formed from a curable composition for forming a hard coat layer and is an abrasion resistant layer. Is formed from a curable composition for forming an anti-scratch layer.
• the optical laminate of the present invention has excellent pencil hardness as a hard coat film, and also has an excellent effect of suppressing a decrease in pencil hardness caused by bonding via an adhesive layer. Therefore, the polarizing plate, the image display device, the resistive touch panel and the capacitive touch panel of the present invention including this optical laminate as a constituent member maintain the excellent pencil hardness of the hard coat film at an excellent level. be able to.
• the optical laminate of the present invention has at least an adhesive layer, a support arranged on one side of the adhesive layer, and a hard coat layer arranged on the support, and has a storage elastic modulus A of the adhesive layer.
• the thickness B satisfy the following formula (1).
• the unit of the storage elastic modulus A is MPa
• the unit of the thickness B is ⁇ m.
• a ⁇ 30 ⁇ B ⁇ 0 is satisfied.
• the support in the optical laminate of the present invention has a tensile elastic modulus of 4.5 GPa or more, a product of the indentation elastic modulus and a recovery rate of 3.75 or more, and a thickness of 80 ⁇ m or more.
• the hard coat layer is a hard coat layer having a indentation elastic modulus of 7 GPa or more and a thickness of 10 ⁇ m or more.
• the difference between the pencil hardness of the hard coat film composed of the support and the hard coat layer and the pencil hardness of the optical laminate is within 1H.
• the optical laminate of the present invention achieves a hard coat film showing high pencil hardness as a hard coat film composed of a support and a hard coat layer by increasing the elastic modulus and thickness of the hard coat layer to a specific value or more. can do.
• an adherend such as a polarizing plate via an adhesive layer
• the pencil hardness is lowered due to the adhesion.
• the optical laminate of the present invention has a high pencil hardness as a hard coat film, and even after being bonded to an adherend such as a polarizing plate via an adhesive layer. , It was found that the decrease in pencil hardness can be suppressed to within 1H and good pencil hardness can be maintained.
• Adhesive layer The adhesive layer in the optical laminate of the present invention may be an adhesive layer (a) or an adhesive layer (b) as long as the above formula (1) is satisfied.
• the pressure-sensitive adhesive layer (a) and the pressure-sensitive adhesive layer (b) used as the adhesive layer in the optical laminate of the present invention will be described in detail.
• the pressure-sensitive adhesive layer means a pressure-sensitive adhesive, that is, a layer composed of a viscoelastic body that exhibits adhesiveness only by applying a force after bonding.
• the pressure-sensitive adhesive layer (a) used in the present invention is particularly limited as long as it is a pressure-sensitive adhesive layer usually used for bonding retardation films or display elements and satisfies the above formula (1). It can be used without doing anything.
• the pressure-sensitive adhesive in the present invention does not include the adhesive described later, which develops adhesiveness by drying or reaction after bonding.
• Examples of the adhesive used for the adhesive layer (a) include rubber adhesive, acrylic adhesive, silicone adhesive, urethane adhesive, vinyl alkyl ether adhesive, polyvinylpyrrolidone adhesive, polyacrylamide adhesive and cellulose adhesive. Examples include agents. Of these, an acrylic pressure-sensitive adhesive (pressure-sensitive pressure-sensitive adhesive) is preferable from the viewpoint of transparency, weather resistance, heat resistance, and the like.
• the pressure-sensitive adhesive layer (a) is, for example, a method in which a solution of a pressure-sensitive adhesive is applied onto a release sheet, dried, and then transferred to the surface of the transparent resin layer; the solution of the pressure-sensitive adhesive is directly applied to the surface of the transparent resin layer. It can be formed by a method of applying and drying; etc.
• the pressure-sensitive adhesive solution is prepared as a solution of about 10 to 40% by mass in which the pressure-sensitive adhesive is dissolved or dispersed in a solvent such as toluene or ethyl acetate.
• a roll coating method such as reverse coating or gravure coating, a spin coating method, a screen coating method, a fountain coating method, a dipping method, a spray method and the like can be adopted.
• Examples of the constituent material of the release sheet include synthetic resin films such as polyethylene, polypropylene, and polyethylene terephthalate; rubber sheets; paper; cloth; non-woven fabrics; nets; foam sheets; metal foils; and the like. Can be mentioned.
• the adhesive layer means an adhesive, that is, a layer composed of an agent that develops adhesiveness by drying and reaction after bonding.
• the adhesive layer (b) used in the present invention can be used without particular limitation as long as it is an adhesive layer satisfying the above formula (1).
• a polyvinyl alcohol adhesive (PVA adhesive) develops adhesiveness by drying and can bond materials to each other.
• PVA adhesive polyvinyl alcohol adhesive
• Specific examples of the curable adhesive that develops adhesiveness by reaction include an active energy ray-curable adhesive such as a (meth) acrylate adhesive and a cationic polymerization curable adhesive such as an epoxy adhesive.
• the curable component in the (meth) acrylate adhesive examples include a compound having a (meth) acrylic group and a compound having a vinyl group.
• a compound having at least one of a cationically polymerizable group of an epoxy group and an oxetanyl group can also be used.
• the compound having an epoxy group is not particularly limited as long as it has at least two epoxy groups in the molecule, and various generally known curable epoxy compounds can be used.
• Preferred epoxy compounds include compounds having at least two epoxy groups and at least one aromatic ring in the molecule (aromatic epoxy compounds) and at least one of them having at least two epoxy groups in the molecule. Examples thereof include a compound (alicyclic epoxy compound) formed between two adjacent carbon atoms constituting an alicyclic ring.
• the adhesive layer in the optical laminate of the present invention is either an acrylic pressure-sensitive adhesive, an active energy ray-curable adhesive such as a (meth) acrylate adhesive, or a cationic polymerization-curable adhesive such as an epoxy adhesive. It is preferably composed of either an acrylic pressure-sensitive adhesive, a (meth) acrylate adhesive, or an epoxy adhesive, and more preferably composed of an acrylic pressure-sensitive adhesive or a (meth) acrylate adhesive. Is even more preferable. These adhesives and adhesives are not particularly limited as long as the above formula (1) is satisfied.
• the acrylic adhesive described in International Publication No. 2017/20428 and the acrylic described in JP-A-2005-298641 the acrylic adhesive described in International Publication No. 2017/20428 and the acrylic described in JP-A-2005-298641.
• the pressure-sensitive adhesive, the acrylic pressure-sensitive adhesive described in JP-A-2011-128439, the acrylic pressure-sensitive adhesive described in JP-A-2010-44211 and the like can be appropriately adjusted and
• the storage elastic modulus of the adhesive layer in the optical laminate of the present invention is preferably 0.04 MPa or more, more preferably 0.1 MPa or more, further preferably 0.3 to 5 MPa, particularly preferably 0.5 to 5 MPa, and 0. Most preferably, it is 7 to 2.5 MPa.
• the storage elastic modulus of the adhesive layer is at least the above-mentioned preferable lower limit value, it is difficult to stretch and the handleability is good, and when it is at least the above-mentioned preferable upper limit value, good adhesiveness can be exhibited.
• the storage elastic modulus is a value measured under the conditions of a frequency of 1 Hz and 25 ° C. using a dynamic viscoelasticity measuring device (trade name: DVA-200) manufactured by IT Measurement Control Co., Ltd.
• the thickness of the adhesive layer in the optical laminate of the present invention is preferably 1 to 30 ⁇ m, more preferably 3 to 15 ⁇ m, and even more preferably 5 to 10 ⁇ m.
• the thickness of the adhesive layer is not more than the above-mentioned preferable upper limit value, it is possible to suppress a decrease in pencil hardness that occurs when the hard coat film is attached to the adherend via the adhesive layer. Further, when the thickness of the adhesive layer is at least the above-mentioned preferable lower limit value, the handleability is good without the occurrence of tearing or the like.
• the thickness of the adhesive layer is defined as 5 by cutting the optical laminate or the layer constituting the optical laminate with a microtome to obtain a cross section, and observing SEM (Scanning Electron Microscope) at a magnification of 1000 to 3000 times. Point measurement is performed, and the average of these is taken as the thickness.
• the thickness of the support and the thickness of the hard coat layer are also values measured and calculated in the same manner as the thickness of the adhesive layer.
• the storage elastic modulus A and the thickness B of the adhesive layer in the optical laminate of the present invention satisfy the following formula (1), preferably the following formula (2), and preferably the following formula (3). More preferred.
• the unit of the storage elastic modulus A is MPa and the unit of the thickness B is ⁇ m, which are the values measured by the above-mentioned methods.
• a ⁇ 30-B ⁇ 0 equation (1) A ⁇ 30-B ⁇ 6 formula (2)
• the adhesive layer in the optical laminate of the present invention satisfies the above formula (2), has a thickness of 3 to 15 ⁇ m, and has a storage elastic modulus of 0.3, from the viewpoint of further improving the pencil hardness of the hard coat film. From the viewpoint of further improving the pencil hardness of the hard coat film and further suppressing the decrease in pencil hardness when the hard coat film is attached to the adherend via the adhesive layer, the above formula is preferable. It is more preferable that (3) is satisfied, the thickness is 5 to 10 ⁇ m, and the storage elastic modulus is 0.7 to 2.5 MPa.
• the adhesive layer may have a one-layer structure or a laminated structure of two or more layers. In the case of a laminated structure of two or more layers, the relationship of the above formulas (1) to (3) may be satisfied as the entire adhesive layer.
• the support in the optical laminate of the present invention has a tensile elastic modulus of 4.5 GPa or more, a product of the indentation elastic modulus and a recovery rate of 3.75 or more, and a thickness of 80 ⁇ or more.
• the film used in the front plate of the image display device can be used without particular limitation.
• a resin film is preferable.
• the resin film include an acrylic resin film, a polycarbonate (PC) resin film, a triacetyl cellulose (TAC) resin film, a polyolefin resin film, a polyester resin film, and an acrylonitrile butadiene styrene copolymer film.
• a film, a triacetyl cellulose resin film or a polycarbonate resin film is preferable.
• the acrylic resin film refers to a polymer or copolymer resin film containing one or more compounds selected from an acrylic acid ester and a methacrylic acid ester as constituents. Examples of acrylic resin films include polymethyl methacrylate resin (PMMA) films.
• the support preferably contains triacetyl cellulose, and more preferably a triacetyl cellulose resin film.
• the composition of the triacetyl cellulose resin film is not particularly limited, and may be a single-layer film or a laminated film composed of two or more layers.
• the number of laminated films to be laminated is preferably 2 to 10 layers, more preferably 2 to 5 layers, and even more preferably 2 or 3 layers.
• a film having a different composition from the outer layer and the layer other than the outer layer (core layer or the like) is preferable.
• the outer layers are preferably films having the same composition. Specifically, it is a film having a laminated structure of TAC-a / TAC-b / TAC-a, and the film Tac-a having the same reference numeral a indicates a film having the same composition.
• the triacetyl cellulose resin film contains a sugar ester compound or a phthalate ester compound as a plasticizer.
• a sugar ester compound or the phthalate ester compound for example, the compound described in JP2012-215689A can be used.
• the triacetyl cellulose resin film can be produced, for example, in accordance with the description of the resin film forming method described in paragraphs 0021 to 0043 of International Publication No. 2017/204228 Pamphlet.
• the ratio of methylene chloride in the total solvent used for the surface layer dope represented by TAC-a is preferably 83 to 97% by mass, and more preferably 83 to 92% by mass.
• the adhesion when the hard coat layer is applied to the cellulose ester film is good, and the reworkability of the polarizing plate is also good.
• it is effective for adjusting the curl of the film with a hard coat layer alone and the curl of the polarizing plate form, preferably 3 to 20%, and more preferably 5 to 15%. Is.
• the support is a resin film
• one or more other components such as known additives may be optionally contained.
• the components that can be optionally contained include light stabilizers such as ultraviolet absorbers and inorganic particles such as matting agents.
• the ultraviolet absorber include benzotriazole compounds and triazine compounds.
• the benzotriazole compound is a compound having a benzotriazole ring, and specific examples thereof include various benzotriazole-based ultraviolet absorbers described in paragraph 0033 of JP2013-1111835. ..
• the triazine compound is a compound having a triazine ring, and specific examples thereof include various triazine-based ultraviolet absorbers described in paragraph 0033 of JP2013-1111835.
• the content of the ultraviolet absorber contained in the resin film is not particularly limited, but can be, for example, about 0.1 to 10 parts by mass with respect to 100 parts by mass of the resin contained in the film. Further, regarding the ultraviolet absorber, the description in paragraph 0032 of JP2013-1111835A can also be referred to.
• the ultraviolet ray (UV) means light having a emission center wavelength in the wavelength band of 200 to 380 nm.
• the tensile elastic modulus of the support in the optical laminate of the present invention is 4.5 GPa or more, preferably 4.8 GPa or more.
• the pencil hardness of the optical laminate can be increased.
• the upper limit of the tensile elastic modulus is not particularly determined, but is preferably 20 GPa or less, more preferably 15 GPa or less, further preferably 10 GPa or less, and particularly preferably 8 GPa or less.
• the tensile elastic modulus is a value measured and calculated by the method described in Examples described later.
• the transport direction (MD direction) of the support described in the examples described later when the film is manufactured can be determined by analyzing the support even when the process of manufacturing the support is unknown. ..
• the product of the indentation elastic modulus and the recovery rate of the support in the optical laminate of the present invention is 3.75 or more, preferably 3.80 or more.
• the pencil hardness of the optical laminate can be increased.
• the upper limit of the product of the indentation elastic modulus and the recovery rate is not particularly determined, but is preferably 19.00 or less, more preferably 10.00 or less, and further preferably 5.00 or less.
• the product of the indentation elastic modulus and the recovery rate of the support is a value calculated by measuring the indentation elastic modulus and the recovery rate by the method described in Examples described later.
• the thickness (film thickness) of the support is 80 ⁇ m or more, preferably 100 ⁇ m or more. By setting the thickness to 80 ⁇ m or more, it is possible to suppress a decrease in pencil hardness at the time of attachment to an adherend such as a polarizing plate.
• the upper limit of the thickness (film thickness) is not particularly defined, but is preferably 500 ⁇ m or less, more preferably 400 ⁇ m or less, further preferably 300 ⁇ m or less, particularly preferably 200 ⁇ m or less, and most preferably 150 ⁇ m or less.
• the hard coat layer in the optical laminate of the present invention is not particularly limited as long as it is a hard coat layer having a indentation elastic modulus of 7 GPa or more and a thickness of 10 ⁇ m or more, and image display is not particularly limited.
• the hard coat layer used for the front plate of the device can be used.
• the hard coat layer of the present invention is a hardened layer, and is preferably formed from a curable composition for forming a hard coat layer.
• the curable composition for forming a hard coat layer preferably contains a polymerizable compound 1 having a radically polymerizable group, and from the viewpoint of further improving the pencil hardness of the hard coat film, the polymerizable compound having a radically polymerizable group.
• Polymerization contained in 1 and a polymerizable compound 2 having a cationically polymerizable group and a radically polymerizable group in the same molecule and different from the polymerizable compound 1 and contained in the curable composition for forming a hard coat layer The content of the polymerizable compound 2 in the sex compound is more preferably 51% by mass or more, and has an epoxy group and a (meth) acrylic group in the same molecule as the polymerizable compound 1 having a (meth) acrylic group.
• the content of the polymerizable compound 2 in the polymerizable compound contained in the curable composition for forming a hard coat layer is 51% by mass or more, which contains a polymerizable compound 2 different from the polymerizable compound 1. Is even more preferable.
• each component contained in the curable composition for forming a hard coat layer will be described.
• the polymerizable compound 1 used in the present invention has a radically polymerizable group.
• the polymerizable compound 1 used in the present invention is a compound different from the polymerizable compound 2. That is, the polymerizable compound 1 used in the present invention is a polymerizable compound other than a compound having a radically polymerizable group and having a cationically polymerizable group and a radically polymerizable group in the same molecule.
• the polymerizable compound 1 may be a polymer (for example, a weight average molecular weight of 2000 or more) or a small molecule (for example, a molecular weight of less than 2000), but is preferably a small molecule.
• the molecular weight of the polymerizable compound 1 is preferably 1500 or less, more preferably 1200 or less, and even more preferably 1000 or less.
• the molecular weight of the polymerizable compound 1 is preferably 100 or more, more preferably 120 or more. Within such a range, it is possible to more effectively suppress the volatilization of the polymerizable compound 1 when the hard coat layer is formed.
• the weight average molecular weight is a value measured by GPC (Gel Permeation Chromatography) unless otherwise specified.
• the number of radically polymerizable groups contained in the polymerizable compound 1 may be 1, but it is preferably 2 or more, more preferably 3 or more, further preferably 4 or more, and 6 or more in the same molecule. Is particularly preferable. By setting the number of radically polymerizable groups of the polymerizable compound 1 to two or more in the same molecule, the pencil hardness and adhesion can be improved more effectively.
• the upper limit of the number of radically polymerizable groups contained in the polymerizable compound 1 is not particularly limited, but the effect of the present invention can be sufficiently exhibited even if the number is 10 or less in the same molecule.
• a styryl group and a (meth) acrylic group are preferable, a (meth) acrylic group is more preferable, and a (meth) acryloyloxy group is further preferable.
• the (meth) acrylic group is preferably a methacrylic group.
• a (meth) acrylate compound is preferably used.
• the (meth) acrylate compound a compound having a (meth) acrylic group and forming a cured product having a high hardness used in the technical field of the present invention can be widely adopted.
• Examples of the (meth) acrylate compound include an ester of a polyhydric alcohol and (meth) acrylic acid.
• Examples of the ester of the polyhydric alcohol and the (meth) acrylic acid include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, butanediol di (meth) acrylate, hexanediol di (meth) acrylate, 1,4-.
• the (meth) acrylate compound is preferably a compound (urethane (meth) acrylate) containing at least one urethane bond in one molecule together with the above (meth) acrylic group.
• the commercially available urethane (meth) acrylate is not particularly limited, but for example, UA-306H, UA-306I, UA-306T, UA-510H, UF-8001G, UA- manufactured by Kyoeisha Chemical Co., Ltd. 101I, UA-101T, AT-600, AH-600, AI-600, U-4HA, U-6HA, U-6LPA, UA-32P, U-15HA, UA-1100H, Japanese synthesis manufactured by Shin-Nakamura Chemical Co., Ltd.
• UV-7640B UV-6630B, UV-7000B, UV-7510B, UV-7461TE, UV-3000B, UV-3200B, UV-3210EA, UV-3310EA, UV-3310B, Examples thereof include UV-3500BA, UV-3520TL, UV-3700B, UV-6100B, UV-6640B, UV-2000B, UV-10B, and UV-2250EA.
• Examples include 4000BA, EB-1290K manufactured by Daicel Ornex, Hicorp AU-2010 manufactured by Tokushiki, and AU-2020 manufactured by Tokushiki Corporation.
• urethane (meth) acrylate As specific examples of urethane (meth) acrylate, the following exemplified compounds A-1 to A-8 are also preferable.
• the polymerizable compound 1 is a (meth) acrylate compound having no urethane bond
• the following compounds can also be exemplified.
• the present invention is not limited to the following exemplified compounds.
• Tetrafunctional (meth) acrylate compounds such as tetra (meth) acrylate; dipentaerythritol Penta (meth) acrylate and its EO, PO or epichlorohydrin, fatty acids, alkyl-modified products and other pentafunctional (meth) acrylate compounds; dipentaerythritol Hexa (meth) acrylate and its EO, PO or epichlorohydrin, fatty acid, alkyl modified product, sorbitol hexa (meth) acrylate, and its EO, PO or epichlorohydrin, fatty acid, alkyl modified product and the like.
• polyester (meth) acrylate or epoxy (meth) acrylate having a weight average molecular weight of 200 or more and less than 1000 is also preferable.
• polyester (meth) acrylate trade name manufactured by Arakawa Chemical Industry Co., Ltd .: Beam set 700 series, that is, beam set 700 (6 functionals), beam set 710 (4 functionals), beam set 720 (3 functionals), etc. Can be mentioned.
• the (meth) acrylate compound which is the polymerizable compound 1 a (meth) acrylate compound having three or more (meth) acrylic groups other than the above can also be mentioned as a preferable form.
• examples of the (meth) acrylate compound having three or more (meth) acrylic groups include the following exemplified compounds A-9 to A-11.
• Examples of the (meth) acrylate compound having three or more (meth) acrylic groups include the exemplary compound shown in paragraph 0906 of JP-A-2007-256844. Further, as specific compounds of the (meth) acrylate compound having three or more (meth) acrylic groups, KAYARAD DPHA, DPHA-2C, PET-30, TMPTA, TPA- manufactured by Nippon Kayaku Co., Ltd. 320, TPA-330, RP-1040, T-1420, D-310, DPCA-20, DPCA-30, DPCA-60, GPO-303, manufactured by Osaka Organic Chemical Industry Co., Ltd. Examples thereof include esterified compounds of polyols such as V # 400 and V # 36095D and (meth) acrylic acid.
• UV-1400B UV-1700B, UV-6300B, UV-7550B, UV-7600B, UV-7605B, UV-7610B, UV-7620EA, UV-7630B, UV-7640B.
• UV-6630B UV-7000B, UV-7510B, UV-7461TE, UV-3000B, UV-3200B, UV-3210EA, UV-3310EA, UV-3310B, UV-3500BA.
• UV-3520TL UV-3700B, UV-6100B, UV-6640B, UV-2000B, UV-2010B, UV-2250EA, UV-2750B
• UL-503LN manufactured by Kyoeisha Chemical Co., Ltd.
• Unidic 17-806, 17-813, V-4030, V-4000BA manufactured by Dainippon Ink and Chemicals Co., Ltd.
• EB-1290K EB- 220, EB-5129, EB-1830, EB-4358
• Hicorp AU-2010, AU-2020 manufactured by Tokushiki Co., Ltd.
• Aronix M-1960 Toa Synthetic Co., Ltd.) , Art Resin UN-3320HA, UN-3320HC, UN-3320HS, UN-904, HDP-4T and other trifunctional or higher functional urethan
• the polymerizable compound 1 is preferably at least one selected from dipentaerythritol pentaacrylate, dipentaerythritol hexaacrylate, pentaerythritol triacrylate and diethylene glycol di (meth) acrylate. Examples of these commercially available products include those described in Examples described later.
• the polymerizable compound 1 may be one kind or two or more kinds, and a combination of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate is exemplified as a blend form of two or more kinds.
• the ratio of the polymerizable compound 1 to the polymerizable compound contained in the curable composition for forming a hard coat layer is preferably 49% by mass or less, more preferably 45% by mass or less, still more preferably 35% by mass or less.
• the lower limit of the proportion of the polymerizable compound 1 is preferably 1% by mass or more, more preferably 5% by mass or more, further preferably 8% by mass or more, particularly preferably 10% by mass or more, and particularly preferably 20% by mass or more. preferable. By setting the content to 5% by mass or more, the adhesion and the pencil hardness can be improved more effectively.
• the polymerizable compound 1 may be contained in only one type or two or more types in the curable composition for forming a hard coat layer. When two or more kinds are contained, it is preferable that the total amount is within the above range.
• the polymerizable compound 2 used in the present invention is a polymerizable compound having a cationically polymerizable group and a radically polymerizable group in the same molecule and different from the polymerizable compound 1.
• a polymerizable compound having a cationically polymerizable group and a radically polymerizable group it is possible to further improve the effect of suppressing a decrease in pencil hardness when the hard coat film is attached to an adherend via an adhesive layer. ..
• the polymerizable compound 2 preferably has a low molecular weight, and specifically, the molecular weight is preferably less than 10,000.
• the molecular weight of the polymerizable compound 2 is preferably 400 or less, more preferably 300 or less, and even more preferably 250 or less.
• the lower limit of the molecular weight of the polymerizable compound 2 is preferably 100 or more, and more preferably 120 or more. Within such a range, it is possible to more effectively suppress the volatilization of the polymerizable compound 2 when the hard coat layer is formed.
• the number of cationically polymerizable groups in one molecule is preferably 1 to 10, more preferably 1 to 4, further preferably 1 or 2, and 1 in particular. preferable.
• the number of radically polymerizable groups in one molecule is preferably large, preferably 1 to 10, more preferably 1 to 4, further preferably 1 or 2, and particularly preferably 1. ..
• the ratio of the number of radically polymerizable groups to the number of cationically polymerizable groups in one molecule is 0.5 to 2.0. It is preferably 0.8 to 1.2, and more preferably 0.8 to 1.2.
• the cationically polymerizable group contained in the polymerizable compound 2 is preferably at least one of an oxetanyl group and an epoxy group, more preferably an epoxy group, and even more preferably an alicyclic epoxy group.
• Examples of the alicyclic structure contained in the alicyclic epoxy group include a cyclo ring, a dicyclo ring, and a tricyclo ring structure, and specific examples thereof include a dicyclopentanyl ring and a cyclohexane ring. ..
• a styryl group and a (meth) acrylic group are preferable, a (meth) acrylic group is more preferable, and a (meth) acryloyloxy group is further preferable.
• the (meth) acrylic group is preferably a methacrylic group.
• the polymerizable compound 2 preferably has one alicyclic epoxy group and one radically polymerizable group in the same molecule.
• the polymerizable compound 2 is more preferably a compound represented by the following general formula (1).
• R represents a monocyclic hydrocarbon or a crosslinked hydrocarbon
• L represents a single bond or a divalent linking group
• Q represents a radically polymerizable group.
• R in the general formula (1) is a monocyclic hydrocarbon, it is preferably an alicyclic hydrocarbon, more preferably an alicyclic group having 4 to 10 carbon atoms, and an alicyclic group having 5 to 7 carbon atoms.
• the group is more preferable, and the alicyclic group having 6 carbon atoms is particularly preferable.
• a cyclobutyl group, a cyclopentyl group, a cyclohexyl group and a cycloheptyl group are preferable, and a cyclohexyl group is particularly preferable.
• R in the general formula (1) is a crosslinked hydrocarbon
• a bicyclic bridge (biciclo ring) and a tricyclic bridge (triciclo ring) are preferable, and a crosslinked hydrocarbon having 5 to 20 carbon atoms can be mentioned, and a norbornyl group is used.
• L represents a divalent linking group
• a divalent aliphatic hydrocarbon group is preferable.
• the number of carbon atoms of the divalent aliphatic hydrocarbon group is preferably 1 to 6, more preferably 1 to 3, and even more preferably 1.
• a linear, branched or cyclic alkylene group is preferable, a linear or branched alkylene group is more preferable, and a linear alkylene group is further preferable.
• the radically polymerizable group represented by Q has the same meaning as the above-mentioned radically polymerizable group, and the preferable range is also the same.
• the polymerizable compound 2 include the alicyclic epoxy group-containing (meth) acrylate described in paragraph 0015 of JP-A No. 10-17614, and the following general formula (1A) or (1B).
• the compounds to be used can be mentioned. Among them, the compound represented by the following general formula (1A) or (1B) is more preferable, and the compound represented by the following general formula (1A) is further preferable from the viewpoint of having a lower molecular weight.
• the compound represented by the following general formula (1A) is also preferably an isomer thereof.
• L 2 represents a divalent aliphatic hydrocarbon group having 1 to 6 carbon atoms, and the carbon number is more preferably 1 to 3 and the carbon number is 1 (that is, polymerizable).
• Compound 2 is epoxycyclohexylmethyl (meth) acrylate), which is more preferable from the viewpoint of further improving the effect of suppressing a decrease in pencil hardness when the hard coat film is attached to the adherend via the adhesive layer.
• R 1 represents a hydrogen atom or a methyl group
• L 2 represents a divalent aliphatic hydrocarbon group having 1 to 6 carbon atoms.
• R 1 represents a hydrogen atom or a methyl group
• L 2 represents a divalent aliphatic hydrocarbon group having 1 to 6 carbon atoms.
• the divalent aliphatic hydrocarbon group of L 2 in the general formulas (1A) and (1B) has 1 to 6 carbon atoms, more preferably 1 to 3 carbon atoms, and even more preferably 1 carbon atom.
• a linear, branched or cyclic alkylene group is preferable, a linear or branched alkylene group is more preferable, and a linear alkylene group is further preferable.
• the polymerizable compound 2 is preferably at least one selected from glycidyl (meth) acrylate and epoxycyclohexylmethylmethacrylate.
• the polymerizable compound 2 can be synthesized by a known method.
• the polymerizable compound 2 can also be obtained as a commercially available product.
• Examples of the above-mentioned commercial products include Cyclomer M100 manufactured by Daicel Corporation, Light Ester G manufactured by Kyoeisha Chemical Co., Ltd., 4HBAGE manufactured by Nihon Kasei Co., Ltd., and SP series traded by Showa Polymer Co., Ltd., for example, SP-1506, 500, SP. -1507, 480, VR series, for example, VR-77, trade names EA-1010 / ECA, EA-11020, EA-1025, EA-6310 / ECA manufactured by Shin-Nakamura Chemical Industry Co., Ltd. can be mentioned.
• the proportion of the polymerizable compound 2 in the polymerizable compound contained in the curable composition for forming a hard coat layer is 51% by mass or more, preferably 55% by mass or more, and more preferably 65% by mass or more. .. Within such a range, an excellent hard coat film can be obtained due to the effect of suppressing a decrease in pencil hardness when the hard coat film is attached to an adherend via an adhesive layer.
• the upper limit of the proportion of the polymerizable compound 2 is preferably 99% by mass or less, more preferably 95% by mass or less, further preferably 92% by mass or less, particularly preferably 90% by mass or less, and 80% by mass or less. May be good.
• the polymerizable compound 2 may be contained in only one type or two or more types in the curable composition for forming a hard coat layer. When two or more kinds are contained, it is preferable that the total amount is within the above range.
• the curable composition for forming a hard coat layer may contain another polymerizable compound different from the polymerizable compound 1 and the polymerizable compound 2.
• the other polymerizable compound is preferably a polymerizable compound having a cationically polymerizable group.
• the cationically polymerizable group has the same meaning as the cationically polymerizable group described in the polymerizable compound 2, and the preferred range is also the same.
• a nitrogen-containing heterocyclic compound containing a cationically polymerizable group is preferable.
• nitrogen-containing heterocycle examples include an isocyanurate ring (nitrogen-containing heterocycle contained in the exemplified compounds B-1 to B-3 described later) and a glycoluryl ring (nitrogen-containing heterocycle contained in the exemplified compound B-10 described later). Nitrogen-containing heterocycles selected from the group consisting of are exemplified, and isocyanurate rings are more preferable.
• the number of cationic groups contained in the other polymerizable compound is preferably 1 to 10, more preferably 2 to 5.
• the support preferably contains an acrylic resin film. With such a configuration, the adhesion between the support and the hard coat layer tends to be further improved.
• exemplary compounds B-1 to B-10 are shown as specific examples of other polymerizable compounds, but the present invention is not limited to the following specific examples.
• 3,4-epoxycyclohexylmethyl-3', 4'-epoxycyclohexanecarboxylate for example, commercially available products such as UVR6105 and UVR6110 manufactured by Union Carbite and CELLOXIDE 2021P manufactured by Daicel
• bis for example
• 3,4-Epoxycyclohexylmethyl) adipate eg UVR6128 from Union Carbite
• vinylcyclohexene monoepoxiside eg, celloxide 2000 from Daicel
• ⁇ -caprolactone modified 3,4-epoxycyclohexylmethyl 3' examples thereof include 4'-epoxycyclohexanecarboxylate (for example, celloxide 2081 manufactured by Daicel Co., Ltd.).
• the content thereof is adjusted to the curable composition for forming a hard coat layer.
• the total polymerizable compounds contained it is preferably 20% by mass or less, more preferably 15% by mass or less, further preferably 10% by mass or less, and particularly preferably 5% by mass or less.
• the lower limit of the content is preferably 1% by mass or more, more preferably 3% by mass or more.
• the curable composition for forming a hard coat layer may contain only one kind of the above-mentioned other polymerizable compound, or may contain two or more kinds.
• the curable composition for forming a hard coat layer may be configured so as to substantially not contain the above-mentioned other polymerizable compounds.
• substantially not contained means, for example, less than 1% by mass, preferably 0% by mass, of the total polymerizable compound contained in the curable composition for forming a hard coat layer (hereinafter, “substantially not contained”). The same applies to.).
• the curable composition for forming a hard coat layer preferably contains inorganic particles. By containing the inorganic particles, the effect of improving the pencil hardness of the hard coat film is more effectively exhibited.
• the inorganic particles that can be used in the curable composition for forming a hard coat layer are not particularly limited. For example, silica particles, zirconia particles and alumina particles can be mentioned, and silica particles are preferable. These inorganic particles may be surface-modified inorganic particles, and inorganic particles modified with a (meth) acrylic group or an epoxy group are preferable.
• the inorganic particles may be used as the inorganic particles, and for example, MEK-AC-2140Z (manufactured by Nissan Chemical Industries, Ltd.) can be used.
• the content of the inorganic particles in the solid content of the curable composition for forming a hard coat layer is preferably 10% by mass or more, more preferably 20% by mass or more. , 40% by mass or more is more preferable.
• the upper limit is not particularly limited, but 80% by mass or less is practical, and 60% by mass or less is preferable.
• the curable composition for forming a hard coat layer preferably contains a polymerization initiator.
• the polymerization initiator may be a photopolymerization initiator or a thermal polymerization initiator.
• examples of the polymerization initiator include radical polymerization initiators and cationic polymerization initiators.
• the curable composition for forming a hard coat layer preferably contains at least one of a radical polymerization initiator and a cationic polymerization initiator, and more preferably contains both a radical polymerization initiator and a cationic polymerization initiator.
• a radical polymerization initiator preferably contains both a radical polymerization initiator and a cationic polymerization initiator.
• the radical polymerization initiator is preferably a radical photopolymerization initiator.
• the radical photopolymerization initiator may be any as long as it can generate radicals as an active species by light irradiation, and known radical photopolymerization initiators can be used without any limitation. Specific examples include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethylketal, 4- (2-hydroxyethoxy) phenyl- (2-hydroxy-2-propyl) ketone.
• auxiliary agent for the radical photopolymerization initiator triethanolamine, triisopropanolamine, 4,4'-dimethylaminobenzophenone (Michler ketone), 4,4'-diethylaminobenzophenone, 2-dimethylaminoethyl benzoic acid, 4- Ethyl dimethylaminobenzoate, ethyl 4-dimethylaminobenzoic acid (n-butoxy), isoamyl 4-dimethylaminobenzoate, 2-ethylhexyl 4-dimethylaminobenzoate, 2,4-diethylthioxanthone, 2,4-diisopropylthioxanthone Etc.
• radical photopolymerization initiators and auxiliaries can be synthesized by known methods and are also available as commercial products.
• examples of commercially available radical photopolymerization initiators include IRGACURE (registered trademark) 184 (1-hydroxy-cyclohexyl-phenyl-ketone, ⁇ -hydroxyalkylphenone-based radical photopolymerization initiator, manufactured by BASF). ..
• the content of the radical polymerization initiator may be appropriately adjusted within a range in which the polymerization reaction (radical polymerization) of the radically polymerizable compound proceeds satisfactorily, and is not particularly limited.
• the content is preferably 1 to 8% by mass, more preferably 1 to 5% by mass, and more preferably 3 to 5% by mass in the solid content of the curable composition for forming a hard coat layer.
• the radical polymerization initiator may contain only one type, or may contain two or more types. When two or more types are included, the total amount is preferably in the above range.
• the cationic polymerization initiator is preferably a cationic photopolymerization initiator.
• the cationic photopolymerization initiator may be any as long as it can generate a cation as an active species by light irradiation, and a known cationic photopolymerization initiator can be used without any limitation. Specific examples include known sulfonium salts, ammonium salts, iodonium salts (for example, diaryliodonium salts), triarylsulfonium salts, diazonium salts, iminium salts and the like.
• a cationic photopolymerization initiator represented by the formulas (25) to (28) shown in paragraphs 0050 to 0053 of JP-A-8-143806, JP-A-8-283320.
• Examples of the cationic polymerization catalyst in paragraph 0020 of the above can be mentioned, and these contents are incorporated in the present specification.
• the cationic photopolymerization initiator can be synthesized by a known method and is also available as a commercially available product.
• a diazonium salt, an iodonium salt, a sulfonium salt, and an iminium salt are preferable from the viewpoint of the sensitivity of the photopolymerization initiator to light, the stability of the compound, and the like. Moreover, from the viewpoint of weather resistance, iodonium salt is most preferable.
• Specific commercial products of the cationic photopolymerization initiator of the iodonium salt include, for example, B2380 manufactured by Tokyo Kasei Co., Ltd., BBI-102 manufactured by Midori Kagaku Co., Ltd., WPI-113 manufactured by Fujifilm Wako Pure Chemical Industries, Ltd., and Fujifilm.
• the content of the cationic polymerization initiator used in the curable composition for forming a hard coat layer may be appropriately adjusted within a range in which the polymerization reaction (cationic polymerization) of the cationically polymerizable compound proceeds satisfactorily, and is particularly limited. is not it.
• the content of the cationic polymerization initiator is preferably 5% by mass or less, more preferably 3% by mass or less, still more preferably 2% by mass or less, based on the solid content of the curable composition for forming a hard coat layer.
• the lower limit of the content is preferably 0.1% by mass or more, more preferably 0.5% by mass or more, still more preferably 1% by mass or more in the solid content of the curable composition for forming a hard coat layer. ..
• the cationic polymerization initiator may contain only one type, or may contain two or more types. When two or more types are included, the total amount is preferably in the above range.
• the curable composition for forming a hard coat layer preferably contains a solvent.
• a solvent an organic solvent is preferable, and one or more of the organic solvents can be mixed and used at an arbitrary ratio.
• the organic solvent include alcohols such as methanol, ethanol, propanol, n-butanol, and i-butanol; ketones such as acetone, methylisobutylketone, methylethylketone, and cyclohexanone; cellosolves such as ethylcellosolve; toluene.
• Aromatic substances such as xylene; glycol ethers such as propylene glycol monomethyl ether; acetate esters such as methyl acetate, ethyl acetate and butyl acetate; diacetone alcohol and the like.
• methyl ethyl ketone, methyl isobutyl ketone and methyl acetate are preferable, and methyl ethyl ketone, methyl isobutyl ketone and methyl acetate are more preferably mixed and used in an arbitrary ratio. With such a configuration, a hard coat film showing more excellent pencil hardness can be obtained.
• the amount of the solvent in the curable composition for forming a hard coat layer can be appropriately adjusted within a range in which the coating suitability of the composition can be ensured.
• the solvent can be 50 to 500 parts by mass, preferably 80 to 200 parts by mass, based on 100 parts by mass of the total amount of the polymerizable compound and the photopolymerization initiator.
• the solid content of the curable composition for forming a hard coat layer is preferably 10 to 90% by mass, more preferably 50 to 80% by mass, and particularly preferably 65 to 75% by mass. ..
• the hard coat layer can optionally contain one or more of known additives, if necessary.
• additives include antifouling agents, surface conditioners, leveling agents, polymerization inhibitors and the like.
• various additives that can be generally used in the photopolymerizable composition can be used. The amount of various additives added to the hard coat layer or the curable composition for forming the hard coat layer may be appropriately adjusted, and is not particularly limited.
• a fluoropolymer is preferably used.
• the fluoroaliphatic group-containing polymer described in Japanese Patent No. 5175831 can be mentioned.
• a fluoroaliphatic group-containing polymer having a content of the fluoroaliphatic group-containing monomer represented by the general formula (1) of 50% by mass or less of the total polymerization unit, which constitutes the fluoroaliphatic group-containing polymer is used as the leveling agent. You can also do it.
• the antifouling agent described in the curable composition for forming an abrasion-resistant layer described later can be adopted, and the preferable range is also the same.
• the content is preferably 0.01 to 7% by mass, preferably 0.05 to 7% by mass, of the solid content of the curable composition for forming a hard coat layer. 5% by mass is more preferable, and 0.1 to 2% by mass is further preferable.
• the curable composition for forming a hard coat layer may contain only one type of antifouling agent, or may contain two or more types of antifouling agent. When two or more kinds are contained, it is preferable that the total amount is within the above range. Further, the curable composition for forming a hard coat layer may be configured to be substantially free of an antifouling agent.
• the indentation elastic modulus of the hard coat layer in the optical laminate of the present invention is preferably 5 to 30 GPa, more preferably 7 to 25 GPa, further preferably 10 to 20 GPa, and particularly preferably 12 to 20 GPa.
• the indentation elastic modulus of the hard coat layer is a value measured by the method described in Examples described later.
• the film thickness of the hard coat layer is not particularly specified, but is preferably 10 ⁇ m or more, and more preferably 15 ⁇ m or more. By setting the value to the above-mentioned preferable lower limit value or more, the pencil hardness can be increased more effectively.
• the upper limit of the film thickness of the hard coat layer is preferably 60 ⁇ m or less, more preferably 50 ⁇ m or less, further preferably 45 ⁇ m or less, further preferably 30 ⁇ m or less, and even more preferably 25 ⁇ m or less.
• the optical laminate of the present invention preferably has an abrasion-resistant layer on the surface opposite to the support of the hard coat layer from the viewpoint of improving the abrasion resistance.
• the anti-scratch layer is formed from a curable composition for forming an anti-scratch layer.
• the curable composition for forming an abrasion-resistant layer is a composition containing a polymerizable compound 3 having at least two radically polymerizable groups in the same molecule, and has at least three (meth) acrylic groups in the same molecule.
• the composition preferably contains a polymerizable compound and a fluorine-containing compound having a (meth) acrylic group.
• the polymerizable compound 3 has at least two radically polymerizable groups in the same molecule.
• the number of radically polymerizable groups contained in the polymerizable compound 3 is preferably 3 or more, more preferably 4 or more, and even more preferably 6 or more.
• the upper limit of the number of radically polymerizable groups contained in the polymerizable compound 3 is not particularly limited, but the effect of the present invention can be sufficiently achieved even if the number is 10 or less in the same molecule.
• a styryl group and a (meth) acrylic group are preferable, a (meth) acrylic group is more preferable, and a (meth) acryloyloxy group is further preferable.
• the (meth) acrylic group is preferably a methacrylic group.
• the polymerizable compound 3 may be a polymer (for example, a weight average molecular weight of 2000 or more) or a small molecule (for example, a molecular weight of less than 2000), but is preferably a small molecule. By using a small molecule, the number of sites other than radically polymerizable groups is reduced, and the pencil hardness of the hard coat film can be increased more effectively.
• the molecular weight of the polymerizable compound 3 is preferably 1500 or less, more preferably 1200 or less, further preferably 700 or less, and particularly preferably 250 or less.
• the molecular weight of the polymerizable compound 3 is preferably 100 or more, more preferably 120 or more. Within such a range, it is possible to more effectively suppress the volatilization of the polymerizable compound 3 when the abrasion-resistant layer is formed.
• Specific examples of the polymerizable compound 3 include a (meth) acrylate compound, and the (meth) acrylate compound exemplified in the above-mentioned polymerizable compound 1 is more preferable.
• the polymerizable compound 1 contained in the curable composition for forming a hard coat layer and the polymerizable compound 3 contained in the curable composition for forming an abrasion-resistant layer are the same compound.
• the compatibility between the hard coat layer and the abrasion resistant layer is improved, and the adhesion between the hard coat layer and the abrasion resistant layer can be improved more effectively.
• the content of the polymerizable compound 3 is preferably 70% by mass or more, more preferably 75% by mass or more, particularly preferably 80% by mass or more, and one layer of the polymerizable compound contained in the curable composition for forming an abrasion-resistant layer. It is preferably 90% by mass or more, and even more preferably 95% by mass or more. By setting it in such a range, the abrasion resistance can be further improved.
• the upper limit of the content is not particularly limited and may be 100% by mass or less.
• the curable composition for forming an abrasion-resistant layer may contain only one type of the polymerizable compound 3 or may contain two or more types of the polymerizable compound 3. When two or more kinds are contained, it is preferable that the total amount is within the above range.
• the curable composition for forming an abrasion-resistant layer may contain a polymerizable compound other than the polymerizable compound 3.
• a polymerizable compound 2 blended in the curable composition for forming a hard coat layer, another polymerizable compound that may be blended in the composition, and the like can be adopted.
• the other polymerizable compound is preferably a polymerizable compound having a cationically polymerizable group.
• a polymerizable compound having a cationically polymerizable group which may be blended in the curable composition for forming a hard coat layer can be adopted, and the preferred range is also the same.
• the content thereof is included in the curable composition for forming an abrasion-resistant layer.
• the total polymerizable compound is preferably 20% by mass or less, more preferably 15% by mass or less, particularly preferably 10% by mass or less, and even more preferably 5% by mass or less.
• the lower limit of the content is preferably 1% by mass or more, more preferably 3% by mass or more.
• the curable composition for forming an abrasion-resistant layer may contain only one kind of the above-mentioned other polymerizable compounds, or may contain two or more kinds. When two or more kinds are contained, it is preferable that the total amount is within the above range. Further, in the present invention, the curable composition for forming an abrasion-resistant layer may be configured so as to substantially not contain the above-mentioned other polymerizable compounds.
• the curable composition for forming an abrasion-resistant layer may contain inorganic particles.
• inorganic particles inorganic particles that may be blended in the curable composition for forming a hard coat layer can be used, and the preferred range is also the same.
• the content is preferably 20% by mass or less, more preferably 17% by mass or less of the solid content of the curable composition for forming an abrasion-resistant layer.
• the lower limit of the content is preferably 1% by mass or more, more preferably 7% by mass or more.
• the curable composition for forming an abrasion-resistant layer may be configured to substantially not contain inorganic particles.
• the curable composition for forming an abrasion-resistant layer preferably contains a polymerization initiator, and preferably contains a radical polymerization initiator.
• the polymerization initiator may be a photopolymerization initiator or a thermal polymerization initiator.
• a radical polymerization initiator that may be used in the curable composition for forming a hard coat layer can be adopted, and the preferred range is also the same. ..
• the curable composition for forming an abrasion-resistant layer contains a cationically polymerizable compound as a polymerizable compound, it is also preferable to include a cationic polymerization initiator.
• a cationic polymerization initiator used in the curable composition for forming an abrasion-resistant layer, a cationic polymerization initiator that may be used in the curable composition for forming a hard coat layer can be adopted, and the preferred range is also the same.
• the content of the cationic polymerization initiator used in the curable composition for forming an abrasion-resistant layer may be appropriately adjusted within a range in which the polymerization reaction (cationic polymerization) of the cationically polymerizable compound proceeds satisfactorily, and is particularly limited. is not it.
• the content is preferably 5% by mass or less, more preferably 3% by mass or less, still more preferably 2% by mass or less in the solid content of the curable composition for forming an abrasion-resistant layer.
• the lower limit of the content is preferably 0.5% by mass or more, more preferably 1% by mass or more, based on the solid content of the curable composition for forming an abrasion-resistant layer.
• the cationic polymerization initiator may contain only one type, or may contain two or more types. When two or more types are included, the total amount is preferably in the above range.
• the scratch-resistant layer or the curable composition for forming the scratch-resistant layer preferably contains an antifouling agent.
• an antifouling agent By including the antifouling agent, the adhesion of fingerprints and stains can be reduced, and the adhered stains can be easily wiped off. Further, it is possible to further improve the abrasion resistance by improving the slipperiness of the surface.
• the antifouling agent preferably contains a fluorine-containing compound.
• the fluorine-containing compound preferably has a perfluoropolyether group and a polymerizable group (preferably a radically polymerizable group), has a perfluoropolyether group and a polymerizable group, and contains a polymerizable group in one molecule.
• the radically polymerizable group that the fluorine-containing compound preferably has, the description of the radically polymerizable group that the polymerizable compound 3 has can be applied.
• a fluorine-containing compound having a (meth) acrylic group can be applied.
• the fluorine-containing compound may be any of a monomer, an oligomer and a polymer, but is preferably an oligomer (fluorine-containing oligomer).
• the materials described in paragraphs 0012 to 0101 of JP2012-0886999 can be used, and the contents of this publication are incorporated in the present specification. ..
• As the antifouling agent described above one synthesized by a known method may be used, or a commercially available product may be used. As commercially available products, RS-90, RS-78, etc. manufactured by DIC Corporation can be preferably used.
• the content is preferably 0.01 to 7% by mass of the solid content of the curable composition for forming an antifouling layer, and is 0.05 to 0.05. 5% by mass is more preferable, and 0.1 to 2% by mass is further preferable.
• the curable composition for forming an anti-scratch layer may contain only one type of antifouling agent, or may contain two or more types of antifouling agent. When two or more kinds are contained, it is preferable that the total amount is within the above range. Further, the curable composition for forming an antifouling layer may be configured to be substantially free of an antifouling agent.
• the curable composition for forming an abrasion-resistant layer preferably contains a solvent.
• the solvent used in the curable composition for forming an abrasion-resistant layer the solvent used in the curable composition for forming a hard coat layer can be used, and the preferable range is also the same.
• the amount of the solvent in the curable composition for forming an abrasion-resistant layer can be appropriately adjusted within a range in which the coating suitability of the composition can be ensured.
• the solvent is preferably contained in an amount of 50 to 500 parts by mass, more preferably 80 to 200 parts by mass with respect to 100 parts by mass of the total amount of the polymerizable compound and the photopolymerization initiator.
• the solid content of the curable composition for forming an abrasion-resistant layer is preferably 10 to 90% by mass, more preferably 50 to 80% by mass, and particularly preferably 65 to 75% by mass. ..
• the scratch-resistant layer or the curable composition for forming the scratch-resistant layer can optionally contain one or more of known additives.
• an additive include a surface conditioner, a leveling agent, a polymerization inhibitor and the like.
• paragraphs 0032 to 0034 of JP2012-229421A can be referred to.
• the present invention is not limited to these, and various additives that can be generally used in the polymerizable composition can be used. Further, the amount of various additives added to the curable composition for forming an abrasion-resistant layer may be appropriately adjusted, and is not particularly limited.
• the film thickness of the abrasion-resistant layer is not particularly specified, but is preferably 0.05 ⁇ m or more, more preferably 0.08 ⁇ m or more, further preferably 0.1 ⁇ m or more, particularly preferably 1 ⁇ m or more, and even if it is 3 ⁇ m or more. Good. By setting the thickness to 0.05 ⁇ m or more, it becomes possible to more effectively increase the pencil hardness and the abrasion resistance.
• the upper limit of the film thickness of the abrasion-resistant layer is preferably 40 ⁇ m or less, more preferably 30 ⁇ m or less, further preferably 20 ⁇ m or less, particularly preferably 15 ⁇ m or less, and may be 8 ⁇ m or less.
• the optical laminate of the present invention optionally has one or more other layers in addition to the above-mentioned adhesive layer, support and hard coat layer, and abrasion-resistant layer which may be possessed. You may.
• the other layers are not particularly limited, but are, for example, hardened layers other than the hard coat layer and the abrasion resistant layer, antireflection layers, easy-adhesion layers, decorative layers, and 1/4 described later. It may have an optically anisotropic layer used for a wavelength retardation plate.
• paragraphs 0069 to 0091 of Japanese Patent No. 5048304 can be referred to, and these contents are incorporated in the present specification.
• Anti-reflection layer When the hard coat film in the optical laminate of the present invention is used as an antireflection film, one layer or a plurality of layers are formed on the surface of a hard coat layer or a hardened layer such as an abrasion resistant layer which may be provided on the hard coat layer. It is also a preferred embodiment to laminate the antireflection layer of.
• the high refractive index layer, the medium refractive index layer, and the low refractive index layer may be collectively referred to as an antireflection layer.
• the preferred form of the optical laminate of the present invention having an antireflection layer is shown below.
• the hard coat film in the optical laminate of the present invention preferably has a low refractive index layer on the cured layer, either directly or via another layer.
• a preferred embodiment of the low refractive index layer is described in paragraphs 0077 to 0102 of JP2009-204725A, and the contents of this publication are incorporated in the present specification.
• a layer having a high refractive index can be provided between the low refractive index layer and the cured layer to enhance the antireflection property. ..
• the "high”, “medium”, and “low” of the high refractive index layer, the medium refractive index layer, and the low refractive index layer represent the magnitude relationship of the relative refractive index between the layers. Further, in terms of the relationship with the support, the refractive index preferably satisfies the relationship of support> low refractive index layer and high refractive index layer> support.
• a preferred embodiment of the high refractive index layer is described in paragraphs 0103 to 0112 of JP2009-204725A, and the contents of this publication are incorporated in the present specification.
• a material having a lower refractive index than the material constituting the high refractive index layer for example, aluminum oxide (Al 2 O 3 ), silicon dioxide (SiO 2 ), and indefinite specific oxidation. Examples thereof include silicon (SiO 2-X , 0 ⁇ X ⁇ 1), magnesium fluoride (MgF 2 ), and a mixture thereof, and silicon oxide is preferable.
• the refractive index of the low refractive index layer is preferably 1.35 or more and 1.5 or less.
• the lower limit of the refractive index of the low refractive index layer is more preferably 1.38 or more, and further preferably 1.47 or less.
• the optical film thickness of the low refractive index layer is preferably 0.44 ⁇ 0 or less, more preferably 0.35 ⁇ 0 or less, and 0.14 ⁇ 0 or less, when the design wavelength ⁇ 0 is 500 nm. Is even more preferable.
• a material having a higher refractive index than the material constituting the low refractive index layer for example, tantalum pentoxide (Ta 2 O 5 ), niobium pentoxide (Nb 2 O 5 ), titanium Lantern Acid (LaTiO 3 ), Hafnium Oxide (HfO 2 ), Titanium Oxide (TiO 2 ), Chromium Oxide (Cr 2 O 3 ), Zirconium Oxide (ZrO), Zirconium Dioxide (ZnS), Tin Dope Indium Oxide (ITO), Antimon Dope tin oxide (ATO) and mixtures thereof and the like can be mentioned.
• the refractive index of the high refractive index layer is preferably 1.7 or more and 2.5 or less, and more preferably 1.8 or more and 2.2 or less.
• the optical film thickness of the high refractive index layer is preferably 0.036 ⁇ 0 or more and 0.54 ⁇ 0 or less, and more preferably 0.072 ⁇ 0 or more and 0.43 ⁇ 0 or less, when the design wavelength ⁇ 0 is 500 nm. ..
• the method for forming the low refractive index layer and the high refractive index layer is not particularly limited, and wet coating methods and dry coating methods are exemplified, but thin films having a uniform film thickness can be formed, and nanometer level. Since it is easy to adjust the film thickness of the thin film, dry coating methods such as vacuum vapor deposition, CVD (chemical vapor deposition), sputtering, and electron beam steaming are preferable, and sputtering and electron beam deposition are more preferable.
• the hard coat layer in the optical laminate of the present invention has the above-mentioned polymerizable compound 1 having a radically polymerizable group, and the above-mentioned polymerizable compound 1 having a cationically polymerizable group and a radically polymerizable group in the same molecule. It is preferably formed by using a curable composition for forming a hard coat layer containing a polymerizable compound 2 different from the above.
• the hard coat layer forming curable composition can be prepared by simultaneously or sequentially mixing various components constituting the hard coat layer forming curable composition.
• the preparation method is not particularly limited, and a known stirrer or the like can be used for the preparation.
• a hard coat layer can be formed.
• the laminating method is not particularly limited and a known method can be adopted, but coating is preferable.
• the coating can be performed by a known coating method such as a dip coating method, an air knife coating method, a curtain coating method, a roller coating method, a die coating method, a wire bar coating method, and a gravure coating method.
• the coating amount may be adjusted to an amount capable of forming a hard coat layer having a desired film thickness.
• the transport speed at the time of coating is not limited, but can be, for example, 10 to 50 m / min.
• the hard coat layer is formed as a cured layer having a laminated structure of two or more layers (for example, about 2 to 5 layers) by simultaneously or sequentially laminating two or more kinds of hard coat layer forming compositions having different compositions. You can also do it. Further, the hard coat layer and the abrasion resistant layer may be laminated at the same time.
• the hard coat layer is preferably formed by curing a curable composition for forming a hard coat layer.
• the curing method is not particularly limited, and examples thereof include a method of performing a photopolymerization treatment or a thermal polymerization treatment, but in the present invention, the photopolymerization treatment is preferable.
• the photopolymerization treatment is performed, the following aspects are preferable.
• the wavelength of the light to be irradiated may be determined according to the type of the polymerizable compound and the polymerization initiator used.
• Light sources for light irradiation include high-pressure mercury lamps, ultra-high pressure mercury lamps, carbon arc lamps, metal halide lamps, xenon lamps, chemical lamps, electrodeless discharge lamps, light emitting diodes (LEDs), etc. that emit light in the wavelength band of 150 to 450 nm. Can be mentioned.
• the light irradiation amount is usually in the range of 10 ⁇ 3000mJ / cm 2, preferably in the range of 20 ⁇ 1500mJ / cm 2.
• the lamp output and the illuminance are not particularly limited. Further, the light irradiation is preferably performed under a nitrogen purge, and more preferably performed at an oxygen concentration of 0.1% by volume or less.
• the abrasion-resistant layer is in a state in which a part of the polymerizable compound having a radically polymerizable group in the curable composition for forming the hard coat layer is unreacted. It is preferable to provide a curable composition for formation. Such a configuration tends to further improve the adhesion between the hard coat layer and the abrasion resistant layer, which is preferable.
• the curable composition for forming a hard coat layer and the curable composition for forming an abrasion-resistant layer may be cured at the same time. That is, the curable composition for forming a hard coat layer and the curable composition for forming an abrasion-resistant layer may be applied simultaneously or sequentially and then cured at one time.
• the curable composition for forming a hard coat layer or the hard coat layer may be subjected to a drying treatment, if necessary, before and after curing, or both.
• the drying treatment can be performed by blowing warm air, arranging in a heating furnace, transporting in a heating furnace, or the like.
• the heating temperature may be set to a temperature at which the solvent can be dried and removed, and is not particularly limited. For example, it can be dried at 40 to 80 ° C. in 100 to 200 seconds.
• the heating temperature means the temperature of warm air or the ambient temperature in the heating furnace.
• the hard coat layer contains a polymerizable compound 3 having at least two radically polymerizable groups in the same molecule. It is preferable to form an anti-scratch layer using a curable composition for forming an anti-scratch layer.
• the anti-scratch layer is formed in the order of the support, the hard coat layer, and the anti-scratch layer.
• the abrasion-resistant layer may be formed on the surface of the hard coat layer, or may be formed via another layer. Preferably, it is an embodiment formed on the surface of the hard coat layer. Other preferred embodiments of the abrasion-resistant layer are the same as those of the formation of the hard coat layer.
• the difference between the pencil hardness of the hard coat film composed of the support and the hard coat layer and the pencil hardness of the optical laminate is within 1H, and this difference is preferably within 0H. ..
• the pencil hardness is a value measured by the method described in Examples described later, and the hardness on the hard coat layer side, and if it has an abrasion resistant layer, the hardness on the abrasion resistant layer side is measured.
• pencil hardness of a hard coat film composed of a support and a hard coat layer refers to the support, excluding the adhesive layer, among the adhesive layer, the support and the hard coat layer constituting the optical laminate of the present invention. It means the hardness of a pencil using a laminate (hard coat film) composed of a hard coat layer as a measurement sample.
• the optical laminate of the present invention has a layer other than the adhesive layer, the support, and the hard coat layer (for example, an anti-scratch layer), the pencil hardness of the hard coat film and the optical laminate are as described above. Pencil hardness is measured with the other layers mentioned above.
• the method for producing the optical laminate of the present invention is not particularly limited, but for example, it can be produced by laminating the adhesive layer produced as described above to the support side of the hard coat film.
• the method for producing the adhesive layer is as described above.
• the optical laminate of the present invention is processed and used for various purposes. Processing also includes, for example, winding up the manufactured optical laminate into a roll-shaped optical laminate. Further, the optical laminate of the present invention may be punched (also referred to as die-cutting) using a punching blade to form a desired shape. Examples of the desired shape include shapes such as a polarizing plate, a liquid crystal display device, and a touch panel.
• the punching is preferably a method in which the punching blade is inserted from the hard coat layer side of the optical laminate of the present invention and the support and the adhesive layer are passed in this order.
• the optical laminate can be satisfactorily punched by inserting the punching blade from the hard coat layer side and punching.
• the direction in which the punching blade is inserted is preferably 90 ° ⁇ 10 ° with respect to the film surface of the abrasion-resistant layer, more preferably 90 ° ⁇ 3 °, and 90 ° ⁇ 1 °. Is more preferable.
• the die punching machine used for punching is not particularly limited, but Amada's manual press machine Torque Pack Press TP series or the like can be preferably used. Punching is preferably performed at 10 to 40 ° C. and a relative humidity of 30 to 80%, and more preferably 20 to 30 ° C. and a relative humidity of 50 to 70%.
• the article containing the optical laminate of the present invention examples include various articles required to improve abrasion resistance in various industries such as the home appliance industry, the electrical and electronic industry, the automobile industry, and the housing industry. .. Specific examples include touch sensors, touch panels, image display devices such as liquid crystal display devices, windowpanes of automobiles, windowpanes of houses, and the like.
• the optical laminate of the present invention is preferably used as a hard coat film used for a front side polarizing plate for an image display device, and more preferably a hard coat film used for a front side polarizing plate of an image display element of a touch panel. ..
• the touch panel on which the optical laminate of the present invention can be used is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a surface type capacitive touch panel, a projected type capacitive touch panel, or a resistive film type. Examples include a touch panel. Details will be described later.
• the touch panel includes a so-called touch sensor.
• the layer structure of the touch panel sensor electrode portion of the touch panel is either a bonding method in which two transparent electrodes are bonded together, a method in which transparent electrodes are provided on both sides of one substrate, a single-sided jumper, a through-hole method, or a single-area layer method. But it may be.
• the image display device of the present invention is an image display device having a polarizing plate containing the optical laminate and the polarizer of the present invention and an image display element, and preferably the optical laminate and the polarizer of the present invention are used. It has a polarizing plate containing the polarizing plate as a front side polarizing plate.
• the image display device it can be used for an image display device such as a liquid crystal display device (Liquid Crystal Display; LCD), a plasma display panel, an electroluminescence display, a cathode tube display device, and a touch panel.
• the liquid crystal display device As the liquid crystal display device, TN (Twisted Nematic) type, STN (Super-Twisted Nematic) type, TSTN (Triple Super Twisted Nematic) type, multi-domain type, VA (Vertical Element) type, IPS An OCB (Optically Compensated Bend) type and the like can be mentioned. It is preferable that the image display device has improved brittleness, is excellent in handleability, does not impair the display quality due to surface smoothness or wrinkles, and can reduce light leakage during a moist heat test. That is, in the image display device of the present invention, it is preferable that the image display element is a liquid crystal display element. Examples of the image display device having a liquid crystal display element include an Xperia P (trade name) manufactured by Sony Ericsson Corporation.
• the image display element is an organic electroluminescence (EL) display element.
• EL organic electroluminescence
• the known technique can be applied to the organic electroluminescence display element without any limitation.
• Examples of the image display device having an organic electroluminescence display element include GALAXY SII (trade name) manufactured by SAMSUNG.
• the image display element is an In-Cell touch panel display element.
• the in-cell touch panel display element has a touch panel function built into the image display element cell.
• known techniques such as JP-A-2011-76602 and JP-A-2011-222009 can be applied without any limitation.
• Examples of the image display device having the in-cell touch panel display element include the Xperia P (trade name) manufactured by Sony Ericsson Corporation.
• the image display element is an on-cell touch panel display element.
• the on-cell touch panel display element is one in which the touch panel function is arranged outside the image display element cell.
• a known technique such as Japanese Patent Application Laid-Open No. 2012-88683 can be applied without any limitation.
• Examples of the image display device having the on-cell touch panel display element include GALAXY SII (trade name) manufactured by SAMSUNG.
• a touch sensor film is attached to the surface of the optical laminate of the present invention on the adhesive layer side (the side opposite to the side where the hard coat layer is arranged with respect to the support) to form a touch sensor. It can be used as a touch panel including.
• the touch sensor film is not particularly limited, but is preferably a conductive film on which a conductive layer is formed.
• the conductive film is preferably a conductive film in which a conductive layer is formed on an arbitrary support.
• the resistance film type touch panel of the present invention is a resistance film type touch panel having a polarizing plate containing the optical laminate and the polarizing element of the present invention, and preferably the polarizing plate containing the optical laminate and the polarizing element of the present invention. It has as a front-side polarizing plate.
• the resistive touch panel has a basic configuration in which the conductive films of a pair of upper and lower substrates having a conductive film are arranged via spacers so as to face each other.
• the configuration of the resistive touch panel is known, and in the present invention, the known technique can be applied without any limitation.
• the capacitive touch panel of the present invention is a capacitive touch panel having a polarizing plate containing the optical laminate of the present invention and a polarizing element, and preferably polarized light containing the optical laminate of the present invention and a polarizer. It has a plate as a front-side polarizing plate.
• Examples of the capacitance type touch panel method include a surface type capacitance type and a projection type capacitance type.
• the projection type capacitive touch panel has a basic configuration in which an X-axis electrode and a Y-axis electrode orthogonal to the X electrode are arranged via an insulator.
• the X electrode and the Y electrode are formed on separate surfaces on one substrate, and the X electrode, the insulator layer, and the Y electrode are formed on one substrate in the above order.
• Examples thereof include an embodiment in which an X electrode is formed on one substrate and a Y electrode is formed on another substrate (in this embodiment, a configuration in which two substrates are bonded together is the above-mentioned basic configuration).
• the configuration of the capacitive touch panel is known, and in the present invention, the known technique can be applied without any limitation.
• the polarizing plate of the present invention (hereinafter, also referred to as an optical laminate with a polarizing plate) includes at least the optical laminate of the present invention and a polarizer.
• the optical laminate of the present invention can be used as a polarizing plate having a polarizer on the surface of the optical laminate of the present invention on the adhesive layer side (the side opposite to the side where the hard coat layer is arranged with respect to the support). it can. More specifically, in the polarizing plate of the present invention, the polarizer protective film of the polarizing plate composed of the polarizing element and the polarizing element protective films arranged on both sides thereof is in contact with the adhesive layer in the optical laminate of the present invention.
• the optical laminate with a polarizing plate includes a polarizing element protective film between the polarizer and the adhesive layer in the optical laminate of the present invention.
• a polarizing element protective film a conventional polarizing element protective film can be used, and examples thereof include a cellulose acetate film and a polyethylene terephthalate film.
• a cellulose acetate film a cellulose acetate film produced by the solution film forming method described in detail below and stretched in the width direction in the roll film form at a stretching ratio of 10 to 100% may be used.
• the support in the optical laminate of the present invention may be used as an optical laminate with a polarizing plate, which is laminated so as to correspond to one or both of the above-mentioned polarizing element protective films.
• a form in which one of the polarizer protective films has a support in the optical laminate of the present invention and the other polarizer protective film uses a commonly used polarizer protective film such as a cellulose acetate film can be mentioned.
• the polarizer protective film that is not composed of the support in the optical laminate of the present invention is produced by a solution film forming method and is stretched in the width direction in the roll film form at a stretching ratio of 10 to 100%. It is preferable to use a cellulose acetate film.
• the film other than the optical laminate of the present invention is an optical compensation film having an optical compensation layer including an optically anisotropic layer.
• the optical compensation film (phase difference film) can improve the viewing angle characteristics of the liquid crystal display screen.
• the optical compensation film a known one can be used, but the optical compensation film described in JP-A-2001-100042 is preferable from the viewpoint of widening the viewing angle.
• the polarizer examples include an iodine-based polarizer, a dye-based polarizer using a dichroic dye, and a polyene-based polarizer.
• Iodine-based polarizers and dye-based polarizers are generally produced using a polyvinyl alcohol film.
• a known polarizer may be used, or a polarizer cut out from a long polarizer whose absorption axis is neither parallel nor vertical in the longitudinal direction may be used.
• a long polarizer whose absorption axis is neither parallel nor vertical in the longitudinal direction is produced by the following method.
• the film can be produced by a stretching method in which the film transport direction is bent while holding both ends of the film.
• a stretching method in which the angle formed by the film transport direction and the film substantially stretching direction at the outlet of the step of holding both ends of the film is inclined by 45 ° is preferably used from the viewpoint of productivity.
• the difference between the pencil hardness of the hard coat film composed of the support and the hard coat layer and the pencil hardness of the polarizing plate of the present invention is within 1H. This difference is preferably within 0H.
• the pencil hardness is a value measured by the method described in Examples described later.
• the above-mentioned "pencil hardness of a hard coat film composed of a support and a hard coat layer” refers to the support, excluding the adhesive layer, among the adhesive layer, the support and the hard coat layer constituting the optical laminate of the present invention.
• the hardness of a pencil using a laminate (hard coat film) composed of a hard coat layer as a measurement sample it means the hardness of a pencil using a laminate (hard coat film) composed of a hard coat layer as a measurement sample.
• the optical laminate of the present invention has a layer other than the adhesive layer, the support, and the hard coat layer (for example, an anti-scratch layer), the pencil hardness of the hard coat film and the optical laminate are as described above. Pencil hardness is measured with the other layers mentioned above.
• the optical laminate of the present invention is, for example, as described in Japanese Patent No. 5703187, an optical difference formed from a hard coat film and a composition containing a liquid crystal compound on one of the supports. It may be used as a retardation plate having a square layer.
• the surface of the support on which the optically anisotropic layer is laminated is not particularly limited, but it is preferable that the cured layer is laminated on the side opposite to the side on which the cured layer is laminated.
• An alignment film for controlling the orientation of the liquid crystal compound may be provided between the support and the optically anisotropic layer containing the liquid crystal compound.
• the optical characteristics of the hard coat film on which the optically anisotropic layer is laminated are not particularly specified, but the in-plane retardation Re at 550 nm is preferably 5 to 300 nm, more preferably 10 to 250 nm, and 80 to 200 nm. Is even more preferable.
• Re is preferably 80 to 200 nm and the Nz value is 0.1 to 0.9
• Re is 100 to 150 nm and the Nz value is 0.1 to 0.9. Is even more preferable.
• the optical laminate of the present invention may be used for a quarter wavelength retardation plate. Since the 1/4 wavelength retardation plate can convert the linearly polarized light emitted from the polarizer into circularly polarized light, it is possible to improve the visibility when the viewer is wearing polarized sunglasses, for example. ..
• the 1/4 wavelength retardation plate can be produced by a known method, a commercially available resin film having a 1/4 wavelength retardation function can be used as it is, or the commercially available resin film is stretched or the like. A / 4 wavelength phase difference function may be used.
• An optically anisotropic layer may be imparted onto the hard coat film by adhering the surface of the support of the hard coat film and the film in which the optically anisotropic layer is laminated with an adhesive material and peeling off only the film portion.
• the 1/4 wavelength retardation plate may be produced by applying a curable composition containing a liquid crystal compound on an arbitrary support, for example, as described in Japanese Patent No. 4866638. ..
• the 1/4 wavelength retardation plate may be provided on the surface of the support surface of the hard coat film on the side where the hard coat layer and the abrasion resistant layer are not formed, or may be provided on the surface of the abrasion resistant layer.
• the present invention will be described in more detail with reference to examples below.
• the materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed as long as they do not deviate from the gist of the present invention. Therefore, the scope of the present invention is not limited to the specific examples shown below.
• the mixing ratio means the mass ratio unless otherwise specified. Further, the steps described below were carried out at room temperature unless otherwise specified. Here, the room temperature is 25 ° C.
• UV absorber solution U-2 (Preparation of UV absorber solution U-2) The following composition was put into another mixing tank and stirred while heating to dissolve each component to prepare an ultraviolet absorber solution U-2. --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ⁇ UV absorber with the following structure (UV-1) 10.0 parts by mass ⁇ UV absorber with the following structure (UV-2) 10.0 parts by mass ⁇ Methylene chloride 54.3 parts by mass ⁇ Methanol 12.0 parts by mass ⁇ Butanol 0.7 parts by mass ⁇ 12.9 parts by mass of the above cellulose ester solution -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• (Preparation of surface layer dope 2) In the cellulose ester solution, add the ultraviolet absorber solution U-2 so that the amount of the ultraviolet absorber (UV-1) and the ultraviolet absorber (UV-2) is 1.2 parts by mass per 100 parts by mass of the cellulose ester.
• the above-mentioned matting agent dispersion solution M-2 was added so that the amount of silica particles was 0.078 parts by mass per 100 parts by mass of the cellulose ester, methylene chloride was added so as to be 85% by mass of the doping solvent, and the mixture was heated. While sufficiently stirring, each component was dissolved to prepare a surface layer dope 2.
• the obtained dope was heated to 30 ° C. and co-spread from a die into a three-layer structure on a mirror-finished stainless steel support which is a drum having a diameter of 3 m through a flow-casting gear.
• the first layer in contact with the support has a dry film thickness of 6 ⁇ m for the surface layer dope 1
• the second layer has a dry film thickness of 69 ⁇ m for the core layer dope
• the third layer has a dry film thickness of 69 ⁇ m.
• the surface layer dope 2 was prepared so as to have a surface layer having a film thickness of 5 ⁇ m.
• the surface temperature of the support was set to 4 ° C., and the flow width was 1470 mm.
• the space temperature of the entire casting portion was set to 15 ° C. Then, 50 cm before the end point of the casting portion, the cellulose ester film that had been cast and rotated was peeled off from the drum with a residual solvent amount of 240%, and then both ends were clipped with a pin tenter. At the time of peeling, stretching was performed by 6% in the transport direction. Then, while grasping both ends of the film in the width direction (direction orthogonal to the casting direction) with a pin tenter (pin tenter described in FIG. 3 of JP-A-4-1009), a 5% stretching process in the width direction was done. As a result, a support A made of a cellulose ester film having the above-mentioned film thicknesses of the first layer to the third layer and having a total thickness of 80 ⁇ m was produced.
• the total thickness of the cellulose ester film was changed to 100 ⁇ m by setting the dry film thickness of the core layer dope to 89 ⁇ m while keeping the dry film thickness of the surface layer dopes 1 and 2 as it was.
• a support B was produced in the same manner as the support A except for the above.
• a support C composed of a laminated film of three layers of cellulose acylate having an outer layer / a core layer / an outer layer was produced by the following method.
• Phthalate Ester Oligomer A Weight Average Molecular Weight: 750
• UV absorber represented by formula II Formula II:
• Support D In the preparation of the support A, the support was provided except that the dry film thickness of the surface layer dopes 1 and 2 was maintained as it was, and the dry film thickness of the core layer dope was changed to 49 ⁇ m and the total thickness of the cellulose ester film was changed to 60 ⁇ m. Support D was produced in the same manner as body A.
• Support E In the preparation of the support A, the same as the support A except that the surface layer dopes 1 and 2 were not used and only the core layer dope was used and the total thickness of the cellulose ester film was changed to 60 ⁇ m. , Support E was prepared.
• Support F In the preparation of the support A, the same as the support A except that the surface layer dopes 1 and 2 were not used and only the core layer dope was used and the total thickness of the cellulose ester film was changed to 80 ⁇ m. , The support F was prepared.
• DPHA A mixture of dipentaerythritol pentaacrylate (5 radically polymerizable groups, no cationically polymerizable groups) and dipentaerythritol hexaacrylate (6 radically polymerizable groups), DPCA manufactured by Nippon Kayaku Co., Ltd.
• KAYARAD DPCA-60 (trade name), manufactured by Shin-Nakamura Chemical Industry Co., Ltd., has 6 acrylate groups in the compound, and has no cationically polymerizable group.
• Cyclomer 3,4-epoxycyclohexylmethylmethacrylate, manufactured by Daicel Co., Ltd., Cyclomer M100 (trade name), the number of radically polymerizable groups in the compound is one, and the number of cationically polymerizable groups is one.
• MEK-AC-2140Z Product name, manufactured by Nissan Chemical Industries, Ltd., organosilica sol, particle size 10 to 15 nm
• ⁇ Anti-fouling agent, leveling agent> RS-90 Antifouling agent, trade name, manufactured by DIC Corporation, fluorine-containing oligomer having a radically polymerizable group 8SS-723: Antifouling agent, trade name, manufactured by Taisei Fine Chemical Co., Ltd., Silicone acrylic polymer P-112: Leveling agent, Compound P-112 according to paragraph [0053] of Japanese Patent No. 5175831.
• An acrylate polymer was synthesized according to the following procedure. In a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer and a stirrer, 95 parts by weight of butyl acrylate and 5 parts by weight of acrylic acid are polymerized by a solution polymerization method to obtain a mass average molecular weight of 2 million and a molecular weight distribution. An acrylate polymer A1 having a (Mw / Mn) of 3.0 was obtained.
• Acrylic adhesives N1 to N4 and N11 having the compositions shown in Table 2 below were prepared, and the prepared adhesives were applied to a separate film surface-treated with a silicone-based release agent using a die coater, and in an environment of 90 ° C. It was dried for 1 minute and irradiated with ultraviolet rays (UV) under the following conditions to prepare adhesive layers N1 to N4 and N11, respectively.
• the composition of the acrylic pressure-sensitive adhesive, the film thickness of the obtained adhesive layer, and the storage elastic modulus are summarized in Table 2 below.
• the unit of the blending amount of each component in the table is a mass part. The method for measuring the film thickness and the storage elastic modulus will be described later.
• light quantity 150 mJ / cm 2 -UV illuminance and light intensity were measured using UVPF-36 (trade name) manufactured by Eye Graphics.
• Acrylate polymer A1 The acrylate polymer A1 produced above
• A) Polyfunctional acrylate monomer: Tris (acryloyloxyethyl) isocyanurate, molecular weight 423, trifunctional type (manufactured by Toagosei Co., Ltd., trade name "Aronix M-315")
• Isocyanate cross-linking agent trimethylolpropane-modified tolylene diisocyanate, manufactured by Nippon Polyurethane Industry Co., Ltd., trade name "Coronate L”
• Silane coupling agent 3-glycidoxypropyltrimethoxysilane (manufactured by Shin-Etsu Chemical Co., Ltd., trade name "KBM-403""
• the pressure-sensitive adhesive composition N5 was prepared and the adhesive layer N5 was prepared based on Synthesis Example 2 in the preparation of the pressure-sensitive adhesive sheet described in International Publication No. 2017/20428 Pamphlet. Specifically, it is as follows. 96 parts of butyl acrylate (BA), 4 parts of acrylic acid (AA), 0.08 part of t-dodecanethiol (chain transfer agent), polyoxy in a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer and a stirrer.
• BA butyl acrylate
• AA acrylic acid
• t-dodecanethiol chain transfer agent
• an aromatic-modified terpene resin emulsion (trade name: Nanolet R-1050, manufactured by Yasuhara Chemical Co., Ltd., softening point 100 ° C.) was blended as a tackifier, and an epoxy cross-linking agent (trade name: TETRAD-C) was further added. , Mitsubishi Gas Chemical Company, Inc.) was blended in 0.07 parts to prepare an aqueous dispersion type pressure-sensitive adhesive composition N5.
• the water-dispersible pressure-sensitive adhesive composition N5 prepared above is applied to the peel-treated surface of a release sheet (manufactured by Lintec Corporation, trade name: SP-PET3811) in which one side of a polyethylene terephthalate film is peel-treated with a silicone-based release agent.
• a release sheet manufactured by Lintec Corporation, trade name: SP-PET3811
• SP-PET3811 silicone-based release agent
• the pressure-sensitive adhesive solution N6 was prepared in the same manner except that the amount of the coronate compounded was changed to 4 parts by weight, and the adhesive layer N6 was prepared. Specifically, it is as follows. An acrylic copolymer was synthesized by polymerizing 70 parts by weight of 2-ethylhexyl acrylate, 20 parts by weight of ethyl acrylate, 6 parts by weight of hydroxyethyl methacrylate and 4 parts by weight of acrylic acid by a solution polymerization method.
• the weight average molecular weight of the synthesized acrylic copolymer was 300,000, and the glass transition point was ⁇ 35 ° C.
• a polyfunctional isocyanate cross-linking agent manufactured by Nippon Polyurethane Industry Co., Ltd., trade name: Coronate L
• the obtained pressure-sensitive adhesive solution N6 was poured onto a silicone-treated 50 ⁇ m-thick polyethylene terephthalate (PET) film, dried at 90 ° C. for 2 minutes, and then cured at 23 ° C. for 1 week to obtain a thickness of 30 ⁇ m of the adhesive layer N6.
• PET polyethylene terephthalate
• the adhesive layer N10 was produced in the same manner as in the production of the adhesive layer N9 except that the thickness of the adhesive layer was adjusted to 3 ⁇ m.
• the adhesive layer N13 was produced in the same manner as the production of the adhesive layer N2 except that the thickness of the adhesive layer was adjusted to 5 ⁇ m.
• Adhesive layers N7 and N8 were prepared using the pressure-sensitive adhesive compositions of Comparative Examples 2 and 5 described in JP-A-2011-128439, respectively. Specifically, it is as follows. (Preparation of copolymer solutions 6 and 9) Nitrogen gas was introduced into a reaction device equipped with a stirrer, a thermometer, a reflux condenser and a nitrogen introduction tube, and the air in the reaction device was replaced with nitrogen gas. Then, 0.1 part by mass of azobisisobutyronitrile and 120 parts by mass of ethyl acetate were added to the reaction apparatus as shown in Table 3 below. While stirring this, the reaction was carried out at 60 ° C.
• the pressure-sensitive adhesive composition N7 having the following composition was applied onto a PET film coated with a silicone resin, and then dried at 90 ° C. to remove the solvent to prepare an adhesive layer N7 having a thickness of 1 ⁇ m.
• An adhesive layer N8 having a thickness of 3 ⁇ m was prepared in the same manner as in the preparation of the adhesive layer N7 except that the pressure-sensitive adhesive composition N8 having the following composition was used instead of the pressure-sensitive adhesive composition N7.
• the blending amount of 100 parts by mass of each copolymer solution means that 100 parts by mass of the solid content is blended.
• the cured composition HC1 for forming a hard coat layer was cured by irradiating with the ultraviolet rays of the above to form a hard coat layer, and then winding was performed to obtain a hard coat film.
• Examples 2, 3 and 13 to 23, Comparative Examples 1 to 10 In the production of the optical laminate of Example 1, the configurations of the support, the hard coat layer, and the adhesive layer were changed as shown in Table 4, respectively, but in the same manner as in Example 1, Examples 2, 3 and 13. The optical laminates of No. 23 and Comparative Examples 1 to 10 were produced.
• Example 4 Fabrication of optical laminate: with anti-scratch layer> [Example 4]
• (1) Formation of hard coat layer In the formation of the hard coat layer of Example 1, the UV irradiation conditions at the time of curing the hard coat layer were changed to irradiation with an irradiation amount of 20 mW / cm 2 and an irradiation amount of 30 mJ / cm 2. After forming the hard coat layer in the same manner, winding was performed.
• an air-cooled metal halide lamp manufactured by Eye Graphics
• 160 W / cm is used under the condition of an oxygen concentration of about 0.1% by volume
• the illuminance is 300 mW / cm 2
• the irradiation amount is 600 mJ / cm 2.
• Examples 5 to 8, Comparative Example 11 In the production of the optical laminate of Example 4, the configurations of the support, the hard coat layer, and the adhesive layer were the same as in Example 4 except that they were changed as shown in Table 4, and Examples 5 to 8 were compared. The optical laminate of Example 11 was produced.
• ⁇ Measurement of tensile elastic modulus of support A sample of 200 mm (measurement direction) x 10 mm was cut out with the transport direction (MD direction) at the time of film production of the support as the longitudinal direction, and a universal tensile tester "STM T50BP (trade name)" manufactured by Toyo Baldwin Co., Ltd. was used. After adjusting the humidity at ° C. and relative humidity of 60% for 24 hours, the stresses at 0.1% elongation and 0.5% elongation were measured at a tensile speed of 10% / min, and the tensile elastic modulus was determined from the inclination.
• a rubbing tester (manufactured by Tester Sangyo Co., Ltd., trade name: AB-301 COLOR) is used for the surface of the hard coat layer for a hard coat film having no abrasion resistant layer, and the surface of the abrasion resistant layer for a hard coat film with an abrasion resistant layer.
• a rubbing test was carried out under the following conditions using FASTNESS RUBBING TESTER). (Measurement condition) Evaluation environmental conditions: 25 ° C, relative humidity 60% Rubbing material: Steel wool (manufactured by Nippon Steel Wool Co., Ltd., grade No.
• ⁇ Abrasion resistant layer> “Yes” means having an anti-scratch layer prepared by using the braid-resistant adult T1 for forming an anti-scratch layer prepared above.
• ⁇ Hard coat layer> HC1 to HC4 means a hard coat layer prepared by using the curable compositions for forming a hard coat layer prepared above, HC1 to HC4.
• Supports A to F Supports A to F produced above Fujitac TD80UL: Product name, Cellulose triacetate film, Fujifilm Fujitac TG60UL: Product name, Cellulose triacetate film, Fujifilm PET: Polyethylene terephthalate film, Toyobo, Cosmo Shine A4100 (trade name)
• Fujitac TD80UL, Fujitac TG60UL and PET in the process of forming the hard coat layer, the hard coat layer forming curable composition was applied to Fujitac on the outer surface side of the winding and PET on the surface side of the easy-adhesion layer.
• Indentation modulus x recovery rate ⁇ Adhesive layer> N1 to N13: Adhesive layers N1 to N13 produced above A ⁇ 30-B: The storage elastic modulus of the adhesive layer A ⁇ 30-means the value calculated by the thickness B of the adhesive layer. However, the unit of the storage elastic modulus A is MPa, and the unit of the thickness B is ⁇ m. (Evaluation) PH H- PH O : Difference between the pencil hardness of the hard coat film and the pencil hardness of the optical laminate
• the optical laminate of Comparative Example 1 is not the optical laminate of the present invention in that the tensile elastic modulus of the support is 4.2 GPa and is not more than 4.5 GPa specified in the present invention.
• the optical laminates of Comparative Examples 2 and 9 to 11 are not the optical laminates of the present invention in that the thickness of the support is 60 ⁇ m and the thickness is not 80 ⁇ m or more specified in the present invention.
• None of the optical laminates of Comparative Examples 3, 4 and 7 is the optical laminate of the present invention in that the storage elastic modulus and the thickness of the adhesive layer do not satisfy the relationship of the formula (1) defined in the present invention.
• the difference between the pencil hardness of the hard coat film and the pencil hardness of the optical laminate is as large as 2H or 3H, and the hard coat film is attached to the adhesive layer. It was inferior because the decrease in pencil hardness due to sticking to the adherend could not be suppressed.
• the optical laminate of Comparative Example 5 is not the optical laminate of the present invention in that the indentation elastic modulus of the hard coat layer is 4 GPa and is not 7 GPa or more specified in the present invention.
• the optical laminate of Comparative Example 6 is not the optical laminate of the present invention in that the thickness of the hard coat layer is 5 ⁇ m and is not 10 ⁇ m or more specified in the present invention.
• the optical laminate of Comparative Example 8 is not the optical laminate of the present invention in that the product of the indentation elastic modulus and the recovery rate of the support is 3.71 and does not satisfy 3.75 or more specified in the present invention.
• the pencil hardness of the hard coat film was as low as H or 2H, which was inferior.
• the pencil hardness of the hard coat film is as high as 4H or more, and the pencil hardness of the hard coat film and the pencil of the optical laminate are high.
• the difference from the hardness is as small as 0H or 1H, and the effect of suppressing the pencil hardness by adhering the hard coat film to the adherend via the adhesive layer is excellent, and as a result, the pencil hardness is excellent in the state of the optical laminate. I found out that I was doing it.
• Example 10 (1) Preparation of Polarizer According to Example 1 of JP-A-2001-141926, iodine was adsorbed on a stretched polyvinyl alcohol film to prepare a polarizer having a film thickness of 26 ⁇ m.
• Example 11 In the production of the optical laminate with the polarizing plate of Example 10, the polarizing plate of Example 11 was produced in the same manner as in Example 10 except that the optical laminate of Example 5 was used instead of the optical laminate of Example 7. An optical laminate with polarized light was produced. Further, in the production of the optical laminate with a polarizing plate of Example 10, the same as in Example 10 except that the optical laminate of Example 6 was used instead of the optical laminate of Example 7, of Example 12 An optical laminate with a polarizing plate was produced.
• PH H- PH O Difference between the pencil hardness of the hard coat film and the pencil hardness of the optical laminate
• PH H- PH P Difference between the pencil hardness of the hard coat film and the pencil hardness of the optical laminate with a polarizing plate
• the polarizing plates to which the optical laminates of Examples 5 to 7 which are the optical laminates of the present invention are bonded have a high pencil hardness of 7H or more for the hard coat film.
• the difference between the pencil hardness of the hard coat film and the pencil hardness of the optical laminate with a polarizing plate is as small as 0H or 1H, and the effect of suppressing the decrease in pencil hardness by adhering the hard coat film to the polarizing plate via the adhesive layer.
• the optical laminate had excellent pencil hardness in the state of being bonded to the polarizing plate.
• a liquid crystal display element which is an in-cell touch panel display element incorporated in a commercially available liquid crystal display device (manufactured by Sony Ericsson, trade name: Xperia P), was prepared.
• An optical laminate with a polarizing plate prepared in Example 10 was bonded onto the in-cell touch panel display element via an adhesive layer having a thickness of 20 ⁇ m to prepare an image display device having the in-cell touch panel display element.
• An organic electroluminescence display element which is an on-cell touch panel display element incorporated in a commercially available organic EL display device (manufactured by SAMSUNG, trade name: GALAXY SII), was prepared.
• An optical laminate with a polarizing plate prepared in Example 10 was bonded onto the on-cell touch panel display element via an adhesive layer having a thickness of 20 ⁇ m to prepare an image display device having the on-cell touch panel display element. ..
• the adhesive layer is used.
• the effect of suppressing the decrease in pencil hardness by attaching the hard coat film to the image display element was excellent, and as a result, the optical laminate with a polarizing plate had excellent pencil hardness in the state of being attached to the image display element.

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