Laminate and image display device

Abstract

To provide a laminate that can manufacture an image display unit excellent in display performance and discoloration resistance, and an image display device using the same.SOLUTION: A laminate of the present invention has two substrates, and a polarizer layer arranged between the two substrates. The polarizer layer includes one or more azo pigments having two or more azo couplings in a molecule. The two substrates each have a moisture permeability of 10-3 g / m2 day or less. The content of water present between the two substrates is 0.9 g / m2 or less.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to a laminate and an image display device. [Background technology]

[0002] Conventionally, when it was necessary to attenuate, polarize, scatter, or block irradiated light, including laser light or natural light, devices operating on different principles for each function were used. As a result, products corresponding to the above functions were also manufactured using different manufacturing processes for each function. For example, in image display devices (e.g., liquid crystal display devices), linear or circular polarizers are used to control the optical rotation or birefringence in display. Also, in organic light-emitting diodes (OLEDs), circular polarizers are used to prevent reflection of external light.

[0003] Conventionally, iodine has been widely used as a dichroic material in these polarizers, but polarizers using organic dyes as dichroic materials instead of iodine are also being studied. For example, Patent Document 1 describes a light-absorption anisotropic film (polarizer layer) formed using a composition containing a dichroic substance having a predetermined structure ([Claim 1] [Claim 14]). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2017 / 195833 Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors prepared the polarizer layer described in Patent Document 1, sandwiched this polarizer layer between substrates with low moisture permeability (e.g., glass substrates) on both sides to suit a practical application (e.g., a circular polarizer intended to prevent reflection in an organic electroluminescent smartphone), and found that when the resulting laminate was exposed to high temperature conditions for a long period of time, a yellow-colored area appeared in the center of the plane of the laminate. Furthermore, through extensive research, the inventors have found that the degree of discoloration that occurs in the center of the laminate varies depending on the composition of the adhesive used to prepare the laminate and the conditions under which the laminate is prepared.

[0006] Therefore, an object of the present invention is to provide a laminate that can be used to fabricate an image display device that is excellent in display performance and discoloration resistance, and an image display device that uses the same. [Means for solving the problem]

[0007] As a result of extensive research into the above-mentioned problems, the present inventors have found that the above-mentioned problems can be solved by the following configuration.

[0008] [1] A laminate having two substrates and a polarizer layer disposed between the two substrates, the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, The moisture permeability of the two substrates is 10 -3 g / m 2 ·day or less, The amount of moisture between the two substrates is 0.9 g / m 2 The laminate is as follows: [2] The amount of moisture between the two substrates is 0.7g / m 2 The laminate according to [1], which is: [3] The amount of moisture between the two substrates is 0.4g / m 2 The laminate according to [1], which is: [4] The laminate according to any one of [1] to [3], further comprising at least one pressure-sensitive adhesive layer disposed between the two substrates. [5] The total content of reducing agents in at least one adhesive layer is 0.04 g / m 2 The laminate according to [4], which is: [6] The laminate according to [4] or [5], wherein the thickness of each of at least one pressure-sensitive adhesive layer is 100 μm or more. [7] A laminate having two substrates, a polarizer layer disposed between the two substrates, and at least one adhesive layer disposed between the two substrates, the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, The moisture permeability of the two substrates is 10 -3 g / m 2 ·day or less, A laminate, wherein the total thickness of at least one pressure-sensitive adhesive layer is 70 μm or less. [8] The total content of reducing agents in at least one adhesive layer is 0.04 g / m 2 The laminate according to [7], which is: [9] The laminate according to [7] or [8], wherein the total thickness of at least one adhesive layer is 50 μm or more.

[10] A laminate having two substrates, a polarizer layer disposed between the two substrates, at least one low-moisture permeable layer disposed between the two substrates, and at least one pressure-sensitive adhesive layer disposed between the two substrates, the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, The moisture permeability of the two substrates is 10 -3 g / m 2 ·day or less, at least one low moisture permeable layer is disposed between the polarizer layer and the at least one adhesive layer; The moisture permeability of at least one low-moisture permeable layer is 20 g / m 2 · The laminate is below day.

[11] The laminate according to

[10] , wherein at least one low-moisture-permeable layer contains a cyclic polyolefin resin.

[12] The total content of reducing agents in at least one adhesive layer is 0.04 g / m 2The laminate according to

[10] or

[11] , wherein:

[13] The laminate according to any one of [1] to

[12] , wherein the two substrates are both glass substrates.

[14] The laminate according to any one of [1] to

[13] , wherein the thickness of each of the two substrates is 100 to 1100 μm.

[15] The laminate according to any one of [1] to

[14] , wherein the azo dye is a compound represented by formula (1) below.

[16] An image display device comprising the laminate according to any one of [1] to

[15] . [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a laminate from which an image display device excellent in display performance and discoloration resistance can be produced, and an image display device using the same. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention will be described in detail below. The following description of the components may be based on typical embodiments of the present invention, but the present invention is not limited to such embodiments. In this specification, a numerical range expressed using "to" means a range that includes the numerical values ​​before and after "to" as the lower and upper limits. In addition, in this specification, each component may be a single substance corresponding to the component, or two or more substances may be used in combination. Here, when two or more substances are used in combination for each component, the content of that component refers to the total content of the substances used in combination, unless otherwise specified. Furthermore, in this specification, definitions regarding substrates (for example, thickness, type, etc.) refer to common definitions regarding two substrates unless otherwise specified. Furthermore, in this specification, when multiple adhesive layers are present, the definitions regarding the adhesive layers (e.g., thickness, reducing agent content, etc.) refer to common definitions regarding the multiple adhesive layers unless otherwise specified. Furthermore, in this specification, when multiple low-moisture permeable layers are present, the specifications regarding the low-moisture permeable layers (e.g., thickness, moisture permeability, etc.) refer to common specifications regarding the multiple low-moisture permeable layers, unless otherwise specified. Furthermore, in this specification, "(meth)acrylate" is a notation representing "acrylate" or "methacrylate", "(meth)acrylic" is a notation representing "acrylic" or "methacrylic", and "(meth)acryloyl" is a notation representing "acryloyl" or "methacryloyl".

[0011] <Laminate> The laminate of the present invention is a laminate according to the first to third embodiments shown below.

[0012] A laminate according to a first aspect of the present invention is a laminate having two substrates and a polarizer layer disposed between the two substrates, wherein the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, and the moisture permeability of both the two substrates is 10 -3 g / m 2 ·day or less, and the amount of moisture present between the two substrates is 0.9g / m 2 The laminate is as follows:

[0013] A laminate according to a second aspect of the present invention is a laminate having two substrates, a polarizer layer disposed between the two substrates, and at least one pressure-sensitive adhesive layer disposed between the two substrates, wherein the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, and the moisture permeability of each of the two substrates is 10 -3 g / m 2 ·day or less, and the total thickness of at least one pressure-sensitive adhesive layer is 70 μm or less.

[0014] A laminate according to a third aspect of the present invention is a laminate having two substrates, a polarizer layer disposed between the two substrates, at least one low-moisture-permeable layer disposed between the two substrates, and at least one pressure-sensitive adhesive layer disposed between the two substrates, wherein the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, and the moisture permeabilities of the two substrates are both 10-3 g / m 2 At least one low-moisture-permeable layer is disposed between the polarizer layer and at least one pressure-sensitive adhesive layer, and the moisture permeability of the at least one low-moisture-permeable layer is 20 g / m or less. 2 It is a laminated body with a durability of 100% or less.

[0015] Hereinafter, the components constituting the laminates according to the first to third aspects of the present invention (hereinafter, when no particular distinction is required, they will also be abbreviated as "the laminates of the present invention") will be described in detail.

[0016] [substrate] The laminate of the present invention has two substrates. The moisture permeability of the substrate is 10 -3 g / m 2 days or less, and from the viewpoint of durability of organic electroluminescent devices and liquid crystal display devices to which the laminate of the present invention is applied, -4 g / m 2 ·day or less is preferable, 10 -5 g / m 2 The lower limit is not particularly limited, but 10 -10 g / m 2 In many cases, it is more than one day. The moisture permeability of the substrate is measured as follows: Measurement is carried out using a water vapor transmission rate measuring device (AQUATRAN2 (registered trademark) manufactured by MOCON, INC.) under conditions of a measurement temperature of 40° C. and a relative humidity of 90%.

[0017] The material constituting the substrate is not particularly limited, and may be inorganic or organic. The substrate is not particularly limited as long as its moisture permeability is lower than the specified value, and examples thereof include glass substrates, gas barrier films, etc. More specifically, examples thereof include glass substrates such as sealing glass used in organic electroluminescent devices, glass in liquid crystal cells, and surface cover glass, as well as gas barrier films such as high barrier films and barrier films used in organic electroluminescent devices. The substrate may have a single layer structure or a multi-layer structure. Furthermore, the surface side of each substrate may have one or more functional layers such as a surface hardening layer (hard coat layer) and a low reflection layer that suppresses surface reflection occurring at the air interface.

[0018] The substrate is preferably transparent, and is preferably a so-called transparent substrate. In this specification, "transparent" means that the transmittance of visible light is 60% or more, preferably 80% or more, and more preferably 90% or more. There is no particular upper limit, but it is often less than 100%.

[0019] In the present invention, it is preferable that both of the two substrates are glass substrates, since this will enable the effects of the present invention to become more apparent.

[0020] The thickness of the substrate is not particularly limited, but from the viewpoint of thinning, it is preferably 1100 μm or less, more preferably 700 μm or less, and even more preferably 500 μm or less. The lower limit is not particularly limited, but it is preferably 10 μm or more, more preferably 50 μm or more, even more preferably 100 μm or more, and particularly preferably 200 μm or more. In the present invention, for reasons that allow the effects of the present invention to become more apparent, the thickness of each of the two substrates is preferably 100 to 1100 μm, more preferably 100 to 700 μm, and even more preferably 200 to 500 μm.

[0021] [Polarizer layer] The laminate of the present invention has a polarizer layer. The polarizer layer of the laminate of the present invention contains one or more azo dyes having two or more azo bonds in the molecule (hereinafter also formally abbreviated as "azo dyes of the present invention"). The azo dye of the present invention is preferably a dichroic substance having dichroic properties. In the present invention, the dichroic substance means a dye whose absorbance varies depending on the direction.

[0022] [Azo dyes] The azo dye of the present invention may or may not exhibit liquid crystallinity. When the azo dye exhibits liquid crystallinity, it may exhibit either nematic or smectic properties. The temperature range in which the liquid crystal phase is exhibited is preferably room temperature (about 20°C to 28°C) to 300°C, and more preferably 50°C to 200°C from the viewpoints of handling and manufacturing suitability. The azo dye of the present invention is preferably a compound having a chromophore core having two or more azo bonds and a side chain bonded to the end of the chromophore. The chromophore preferably has a structure having an aromatic ring group (e.g., an aromatic hydrocarbon group, an aromatic heterocyclic group) in addition to an azo bond, more preferably a bisazo or trisazo structure having an aromatic ring group and two or three azo bonds, and even more preferably a bisazo structure having an aromatic heterocyclic group (particularly preferably a thienothiazole group) and two azo bonds. The side chain is not particularly limited, and examples thereof include groups represented by R1, R2, or R3 in formula (1) described below.

[0023] The azo dye of the present invention is preferably a compound represented by formula (1) in that it further improves the degree of orientation of the polarizer layer and enables the production of an image display device with better display performance and discoloration resistance (hereinafter abbreviated as "the advantages of the present invention being superior").

[0024] [ka]

[0025] In formula (1), Ar1 and Ar2 each independently represent a phenylene group which may have a substituent or a naphthylene group which may have a substituent, and a phenylene group is preferred in terms of achieving better effects of the present invention.

[0026] In formula (1), R1 represents a hydrogen atom, or an alkyl group, an alkoxy group, an alkylthio group, an alkylsulfonyl group, an alkylcarbonyl group, an alkyloxycarbonyl group, an acyloxy group, an alkylcarbonate group, an alkylamino group, an acylamino group, an alkylcarbonylamino group, an alkoxycarbonylamino group, an alkylsulfonylamino group, an alkylsulfamoyl group, an alkylcarbamoyl group, an alkylsulfinyl group, an alkylureido group, an alkylphosphoric acid amide group, an alkylimino group, or an alkylsilyl group, each of which may have a substituent. Examples of the alkyl group having a substituent in R include groups in which the carbon atoms of the alkyl group are substituted with -O-, -CO-, -C(O)-O-, -OC(O)-, -Si(CH)-O-Si(CH)-, -N(R')-, -N(R')-CO-, -CO-N(R')-, -N(R')-C(O)-O-, -OC(O)-N(R')-, -N(R')-C(O)-N(R')-, -CH=CH-, -C≡C-, -N=N-, -C(R')=CH-C(O)-, or -OC(O)-O-. One or more carbon atoms of the alkyl group may be substituted with the above group, or two or more carbon atoms may be substituted with the above group. The alkyl group for R1 preferably has 1 to 20 carbon atoms, more preferably 2 to 18 carbon atoms, further preferably 4 to 14 carbon atoms, and particularly preferably 8 to 12 carbon atoms. The alkyl group in R1 may have any of a linear, branched, and cyclic structure, but is preferably linear or branched, more preferably linear, in terms of achieving better effects of the present invention. When R1 is a group other than a hydrogen atom, the hydrogen atoms of each group may be substituted with a halogen atom, a nitro group, a cyano group, -N(R1')2, an amino group, -C(R1')=C(R1')-NO2, -C(R1')=C(R1')-CN, or -C(R1')=C(CN)2. One or more hydrogen atoms of each group may be substituted with the above group, or two or more hydrogen atoms may be substituted with the above group. R1' represents a hydrogen atom or a linear or branched alkyl group having 1 to 6 carbon atoms. When there are multiple R1' in each group, they may be the same or different.

[0027] In formula (1), R2 and R3 each independently represent a hydrogen atom, or an alkyl group, alkenyl group, alkoxy group, acyl group, alkyloxycarbonyl group, alkylamide group, alkylsulfonyl group, aryl group, arylcarbonyl group, arylsulfonyl group, aryloxycarbonyl group, or arylamide group, each of which may have a substituent. Examples of the alkyl group having a substituent in R2 and R3 include groups in which the carbon atoms of the alkyl group are substituted with -O-, -S-, -C(O)-, -C(O)-O-, -OC(O)-, -C(O)-S-, -SC(O)-, -Si(CH3)2-O-Si(CH3)2-, -NR2'-, -NR2'-CO-, -CO-NR2'-, -NR2'-C(O)-O-, -OC(O)-NR2'-, -NR2'-C(O)-NR2'-, -CH=CH-, -C≡C-, -N=N-, -C(R2')=CH-C(O)-, or -OC(O)-O-. One or more carbon atoms of the alkyl group may be substituted with the above group, or two or more carbon atoms may be substituted with the above group. The alkyl group in R2 and R3 preferably has 1 to 20 carbon atoms, more preferably 1 to 16 carbon atoms, further preferably 1 to 8 carbon atoms, and particularly preferably 1 to 4 carbon atoms. The alkyl group in R2 and R3 may have any of a linear, branched, or cyclic structure, but is preferably linear or branched, more preferably linear, in terms of achieving better effects of the present invention. When R2 and R3 are groups other than hydrogen atoms, the hydrogen atoms of each group may be substituted with a halogen atom, a nitro group, a cyano group, an -OH group, -N(R2')2, an amino group, -C(R2')=C(R2')-NO2, -C(R2')=C(R2')-CN, or -C(R2')=C(CN)2. One or more hydrogen atoms of each group may be substituted with the above group, or two or more hydrogen atoms may be substituted with the above group. R2' represents a hydrogen atom or a linear or branched alkyl group having 1 to 6 carbon atoms. When there are multiple R2' in each group, they may be the same or different. R2 and R3 may be bonded to each other to form a ring, or R2 or R3 may be bonded to Ar2 to form a ring.

[0028] In terms of achieving better effects of the present invention, R1 is preferably an electron-withdrawing group, and R2 and R3 are preferably groups with low electron-donating properties. Specific examples of groups in which R1 is an electron-withdrawing group include alkylsulfonyl groups, alkylcarbonyl groups, alkyloxycarbonyl groups, acyloxy groups, alkylsulfonylamino groups, alkylsulfamoyl groups, alkylsulfinyl groups, alkylureido groups, and alkyl groups in which carbon atoms are substituted with -C(O)-O- and -O-. Preferred alkyl groups in which carbon atoms are substituted with -C(O)-O- and -O- are groups represented by R11-C(O)-O-R12-O-. R11 represents a linear or branched alkyl group having 1 to 6 carbon atoms (preferably 1 to 3 carbon atoms), and R12 represents a linear or branched alkylene group having 1 to 20 carbon atoms (preferably 2 to 18 carbon atoms). Specific examples of when R2 and R3 are groups with low electron donating properties include groups with the following structure: The group with the following structure is shown in the above formula (1) in a form that includes the nitrogen atom to which R2 and R3 are bonded.

[0029] [ka]

[0030] Specific examples of the azo dye are shown below, but the invention is not limited thereto.

[0031] [ka]

[0032] From the viewpoint of adjusting the color of the polarizer, the azo dye of the present invention preferably has a maximum absorption wavelength in the range of 560 nm or more and 700 nm or less (more preferably 560 to 650 nm, particularly preferably 560 to 640 nm). In this specification, the maximum absorption wavelength (nm) of the azo dye is determined from the ultraviolet-visible light spectrum in the wavelength range of 380 to 800 nm measured with a spectrophotometer using a solution in which the azo dye is dissolved in a good solvent.

[0033] The polarizer layer may contain a plurality of azo dyes or a dichroic material other than the azo dye. The azo dyes and the dichroic material other than the azo dye may or may not be polymerized in the polarizer layer. The polarizer layer may contain a low-molecular-weight liquid crystal compound or a polymer liquid crystal compound, which may or may not be polymerized in the polarizer layer.

[0034] The thickness of the polarizer layer is not particularly limited, but from the viewpoint of flexibility when the laminate of the present invention described below is used in a polarizing element, it is preferably 100 to 8000 nm, and more preferably 300 to 5000 nm.

[0035] A method for producing a polarizer layer includes, for example, a method of forming the polarizer by applying a polarizer-forming composition containing a liquid crystal compound, an azo dye, etc. Each component contained in the polarizer-forming composition will be described in detail below.

[0036] <Liquid crystal compounds> The liquid crystalline compound contained in the polarizer-forming composition may be either a polymer liquid crystalline compound or a low molecular weight liquid crystalline compound, and it is preferable to use a polymer liquid crystalline compound because it can increase the degree of orientation. Here, the term "polymeric liquid crystal compound" refers to a liquid crystal compound having a repeating unit in its chemical structure. The term "low molecular weight liquid crystal compound" refers to a liquid crystal compound that does not have a repeating unit in its chemical structure. Examples of the polymeric liquid crystalline compound include the thermotropic liquid crystalline polymer described in JP 2011-237513 A and the polymeric liquid crystalline compound described in paragraphs

[0012] to

[0042] of WO 2018 / 199096 A. Examples of low-molecular-weight liquid crystal compounds include the liquid crystal compounds described in paragraphs

[0072] to

[0088] of JP-A No. 2013-228706, and among them, liquid crystal compounds exhibiting smectic properties are preferred. As the liquid crystal compound, a high molecular weight liquid crystal compound and a low molecular weight liquid crystal compound may be used in combination.

[0037] The liquid crystalline compound is preferably a polymeric liquid crystalline compound containing a repeating unit represented by the following formula (1) (hereinafter also abbreviated as "repeating unit (1)"), because this results in a higher degree of orientation of the resulting polarizer layer.

[0038] [ka]

[0039] In the above formula (1), P1 represents the main chain of the repeating unit, L1 represents a single bond or a divalent linking group, SP1 represents a spacer group, M1 represents a mesogenic group, and T1 represents a terminal group.

[0040] Specific examples of the main chain of the repeating unit represented by P1 include groups represented by the following formulae (P1-A) to (P1-D). Among these, the group represented by the following formula (P1-A) is preferred from the viewpoints of the variety of monomers that serve as raw materials and ease of handling.

[0041] [ka]

[0042] In the above formulas (P1-A) to (P1-D), "*" represents the bonding position with L1 in the above formula (1). In the above formulas (P1-A) to (P1-D), R 1 , R 2 , R 3 and R 4 each independently represents a hydrogen atom, a halogen atom, a cyano group, an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms. The alkyl group may be a linear or branched alkyl group, or an alkyl group having a cyclic structure (a cycloalkyl group). The alkyl group preferably has 1 to 5 carbon atoms. The group represented by the above formula (P1-A) is preferably one unit of a partial structure of a poly(meth)acrylic acid ester obtained by polymerization of a (meth)acrylic acid ester. The group represented by the above formula (P1-B) is preferably an ethylene glycol unit formed by ring-opening polymerization of the epoxy group of a compound having an epoxy group. The group represented by the above formula (P1-C) is preferably a propylene glycol unit formed by ring-opening polymerization of the oxetane group of a compound having an oxetane group. The group represented by the formula (P1-D) is preferably a siloxane unit of a polysiloxane obtained by condensation polymerization of a compound having at least one of an alkoxysilyl group and a silanol group. Here, the compound having at least one of an alkoxysilyl group and a silanol group is preferably a compound represented by the formula SiR 14 (OR 15 )2-, wherein R 14 is R in (P1-D) 14 is synonymous with R 15 each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.

[0043] In the above formula (1), L1 is a single bond or a divalent linking group. Examples of the divalent linking group represented by L1 include -C(O)O-, -OC(O)-, -O-, -S-, and -C(O)NR 3 -, -NR 3 C(O)-, -SO2-, and -NR 3 R 4In the formula, R 3 and R 4 each independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms which may have a substituent. When P1 is a group represented by formula (P1-A), L1 is preferably a group represented by —C(O)O— because the degree of orientation of the resulting polarizer layer is higher. When P1 is a group represented by any of the formulae (P1-B) to (P1-D), L1 is preferably a single bond because the degree of orientation of the resulting polarizer layer is higher.

[0044] In the above formula (1), the spacer group represented by SP1 preferably contains at least one structure selected from the group consisting of an oxyethylene structure, an oxypropylene structure, a polysiloxane structure, and a fluorinated alkylene structure, for reasons such as the ease of exhibiting liquid crystallinity and the availability of raw materials. Here, the oxyethylene structure represented by SP1 is *-(CH2-CH2O) n1 A group represented by -* is preferred. In the formula, n1 represents an integer of 1 to 20, and * represents the bonding position with L1 or M1 in the above formula (1). n1 is preferably an integer of 2 to 10, more preferably an integer of 2 to 4, and most preferably 3, because this increases the degree of orientation of the resulting polarizer layer. The oxypropylene structure represented by SP1 is preferably *-(CH(CH3)-CHO) because the resulting polarizer layer has a higher degree of orientation. n2 A group represented by -* is preferred, where n2 represents an integer of 1 to 3, and * represents the bonding position to L1 or M1. The polysiloxane structure represented by SP1 is *-(Si(CH3)2-O) because it results in a higher degree of orientation in the resulting polarizer layer. n3 A group represented by -* is preferred, where n3 represents an integer of 6 to 10, and * represents the bonding position to L1 or M1. The fluorinated alkylene structure represented by SP1 is *-(CF2-CF2) because the resulting polarizer layer has a higher degree of orientation. n4A group represented by -* is preferred, where n4 represents an integer of 6 to 10, and * represents the bonding position to L1 or M1.

[0045] In the above formula (1), the mesogenic group represented by M1 is a group that represents the main skeleton of the liquid crystal molecule that contributes to the formation of liquid crystals. The liquid crystal molecules exhibit liquid crystallinity, which is a state (mesophase) intermediate between a crystalline state and an isotropic liquid state. There are no particular limitations on the mesogenic group, and reference can be made to, for example, "Flussige Kristalle in Tabellen II" (VEB Deutsche Verlag fur Grundstoff Industrie, Leipzig, published in 1984), particularly pages 7 to 16, and "Liquid Crystal Handbook" edited by the Liquid Crystal Handbook Editorial Committee (Maruzen, published in 2000), particularly Chapter 3. The mesogenic group is preferably, for example, a group having at least one cyclic structure selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group, and an alicyclic group. The mesogenic group preferably has an aromatic hydrocarbon group, more preferably has 2 to 4 aromatic hydrocarbon groups, and even more preferably has 3 aromatic hydrocarbon groups, because this results in a higher degree of orientation of the resulting polarizer layer.

[0046] As the mesogenic group, from the viewpoints of liquid crystallinity expression, adjustment of the liquid crystal phase transition temperature, availability of raw materials and suitability for synthesis, as well as because the degree of orientation of the resulting polarizer layer is higher, a group represented by the following formula (M1-A) or (M1-B) is preferred, and a group represented by formula (M1-B) is more preferred.

[0047] [ka]

[0048] In formula (M1-A), A1 is a divalent group selected from the group consisting of aromatic hydrocarbon groups, heterocyclic groups, and alicyclic groups, which may be substituted with an alkyl group, a fluorinated alkyl group, an alkoxy group, or a substituent. The divalent group represented by A1 is preferably a 4- to 6-membered ring. The divalent group represented by A1 may be a monocyclic ring or a condensed ring. * indicates the binding position to SP1 or T1.

[0049] Examples of the divalent aromatic hydrocarbon group represented by A1 include a phenylene group, a naphthylene group, a fluorene-diyl group, an anthracene-diyl group, and a tetracene-diyl group. From the viewpoints of the diversity of mesogenic skeleton designs and the availability of raw materials, a phenylene group or a naphthylene group is preferred, and a phenylene group is more preferred.

[0050] The divalent heterocyclic group represented by A1 may be either aromatic or non-aromatic, but is preferably a divalent aromatic heterocyclic group from the viewpoint of further improving the degree of orientation. Atoms other than carbon that constitute a divalent aromatic heterocyclic group include a nitrogen atom, a sulfur atom, and an oxygen atom. When an aromatic heterocyclic group has multiple atoms that constitute the ring other than carbon, these atoms may be the same or different. Specific examples of the divalent aromatic heterocyclic group include a pyridylene group (pyridine-diyl group), a pyridazine-diyl group, an imidazole-diyl group, a thienylene (thiophene-diyl group), a quinolylene group (quinoline-diyl group), an isoquinolylene group (isoquinoline-diyl group), an oxazole-diyl group, a thiazole-diyl group, an oxadiazole-diyl group, a benzothiazole-diyl group, a benzothiadiazole-diyl group, a phthalimido-diyl group, a thienothiazole-diyl group, a thiazolothiazole-diyl group, a thienothiophene-diyl group, and a thienoxazole-diyl group.

[0051] Specific examples of the divalent alicyclic group represented by A1 include a cyclopentylene group and a cyclohexylene group.

[0052] In formula (M1-A), a1 represents an integer of 1 to 10. When a1 is 2 or more, multiple A1 may be the same or different.

[0053] In formula (M1-B), A2 and A3 each independently represent a divalent group selected from the group consisting of an aromatic hydrocarbon group, a heterocyclic group, and an alicyclic group. Specific examples and preferred embodiments of A2 and A3 are the same as those of A1 in formula (M1-A), and therefore, description thereof will be omitted. In formula (M1-B), a2 represents an integer of 1 to 10. When a2 is 2 or greater, multiple A2s may be the same or different, multiple A3s may be the same or different, and multiple LA1s may be the same or different. a2 is preferably an integer of 2 or greater, and more preferably 2, because the degree of orientation of the resulting polarizer layer will be higher. In formula (M1-B), when a2 is 1, LA1 is a divalent linking group. When a2 is 2 or more, the multiple LA1s are each independently a single bond or a divalent linking group, and at least one of the multiple LA1s is a divalent linking group. When a2 is 2, it is preferable that one of the two LA1s is a divalent linking group and the other is a single bond, because this increases the degree of orientation of the resulting polarizer layer.

[0054] In formula (M1-B), the divalent linking group represented by LA1 is -O-, -(CH2) g -, -(CF2) g -, -Si(CH3)2-, -(Si(CH3)2O) g -, -(OSi(CH3)2) g-(g represents an integer from 1 to 10.), -N(Z)-, -C(Z)=C(Z')-, -C(Z)=N-, -N=C(Z)-, -C(Z)2- C(Z')2-, -C(O)-, -OC(O)-, -C(O)O-, -OC(O)O-, -N(Z)C(O)-, -C(O)N(Z)-, - C(Z)=C(Z')-C(O)O-, -OC(O)-C(Z)=C(Z')-, -C(Z)=N-, -N=C(Z)-, -C(Z)=C (Z')-C(O)N(Z”)-, -N(Z”)-C(O)-C(Z)=C(Z')-, -C(Z)=C(Z')-C(O)-S-, -SC Examples include (O)-C(Z)=C(Z')-, -C(Z)=NN=C(Z')- (Z, Z', and Z" independently represent hydrogen, a C1 to C4 alkyl group, a cycloalkyl group, an aryl group, a cyano group, or a halogen atom), -C≡C-, -N=N-, -S-, -S(O)-, -S(O)(O)-, -(O)S(O)O-, -O(O)S(O)O-, -SC(O)-, and -C(O)S-. Of these, -C(O)O- is preferred because it results in a higher degree of orientation of the resulting polarizer layer. LA1 may be a group formed by combining two or more of these groups.

[0055] Specific examples of M1 include the following structures: In the specific examples below, "Ac" represents an acetyl group.

[0056] [ka]

[0057] [ka]

[0058] [ka]

[0059] [ka]

[0060] [ka]

[0061] [ka]

[0062] [ka]

[0063] In the above formula (1), examples of the terminal group represented by T1 include a hydrogen atom, a halogen atom, a cyano group, a nitro group, a hydroxy group, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkylthio group having 1 to 10 carbon atoms, an alkoxycarbonyloxy group having 1 to 10 carbon atoms, an alkoxycarbonyl group having 1 to 10 carbon atoms (ROC(O)-: R is an alkyl group), an acyloxy group having 1 to 10 carbon atoms, an acylamino group having 1 to 10 carbon atoms, an alkoxycarbonylamino group having 1 to 10 carbon atoms, a sulfonylamino group having 1 to 10 carbon atoms, a sulfamoyl group having 1 to 10 carbon atoms, a carbamoyl group having 1 to 10 carbon atoms, a sulfinyl group having 1 to 10 carbon atoms, a ureido group having 1 to 10 carbon atoms, and a (meth)acryloyloxy group-containing group. Examples of the (meth)acryloyloxy group-containing group include a group represented by -LA (L represents a single bond or a linking group. Specific examples of the linking group are the same as those of L1 and SP1 described above. A represents a (meth)acryloyloxy group).

[0064] T1 is preferably an alkoxy group having 1 to 10 carbon atoms, more preferably an alkoxy group having 1 to 5 carbon atoms, and even more preferably a methoxy group, because this increases the degree of orientation of the resulting polarizer layer. These terminal groups may be further substituted with these groups or polymerizable groups described in JP-A-2010-244038.

[0065] T1 is preferably a polymerizable group, since this improves the adhesion to the adjacent layer and improves the cohesive strength of the film. The polymerizable group is not particularly limited, but is preferably a polymerizable group capable of radical polymerization or cationic polymerization. As the radical polymerizable group, a generally known radical polymerizable group can be used, and preferred examples include an acryloyl group or a methacryloyl group. In this case, it is known that the polymerization rate of an acryloyl group is generally fast, and from the viewpoint of improving productivity, an acryloyl group is preferred, but a methacryloyl group can also be used as the polymerizable group. As the cationically polymerizable group, a generally known cationically polymerizable group can be used, and specific examples thereof include an alicyclic ether group, a cyclic acetal group, a cyclic lactone group, a cyclic thioether group, a spiro orthoester group, and a vinyloxy group. Among them, an alicyclic ether group or a vinyloxy group is preferred, and an epoxy group, an oxetanyl group, or a vinyloxy group is particularly preferred.

[0066] The weight-average molecular weight (Mw) of the polymer liquid crystal compound containing the repeating unit represented by the above formula (1) is preferably 1,000 to 500,000, and more preferably 2,000 to 300,000, because this will result in a higher degree of orientation of the resulting polarizer layer. When the Mw of the polymer liquid crystal compound is within the above range, the polymer liquid crystal compound is easy to handle. In particular, from the viewpoint of suppressing cracks during application, the weight average molecular weight (Mw) of the polymeric liquid crystal compound is preferably 10,000 or more, and more preferably 10,000 to 300,000. In addition, from the viewpoint of the temperature latitude of the degree of orientation, the weight average molecular weight (Mw) of the polymer liquid crystal compound is preferably less than 10,000, and more preferably 2,000 or more and less than 10,000. Here, the weight average molecular weight and number average molecular weight in the present invention are values ​​measured by gel permeation chromatography (GPC). Solvent (eluent): N-methylpyrrolidone ·Device name: TOSOH HLC-8220GPC Column: Three TOSOH TSKgel Super AWM-H (6 mm x 15 cm) columns connected together Column temperature: 25℃ Sample concentration: 0.1% by mass ·Flow rate: 0.35mL / min Calibration curve: TOSOH TSK standard polystyrene. Calibration curves are based on seven samples with Mw = 2,800,000 to 1,050 (Mw / Mn = 1.03 to 1.06).

[0067] In the present invention, the logP value of the liquid crystal compound is preferably 0.0 to 10, more preferably 1.0 to 7.0, and even more preferably 2.0 to 5.0, because this makes it easier to adjust the compatibility with the azo dye described above and the dichroic substance described later. Here, the logP value is an index that expresses the hydrophilic and hydrophobic properties of a chemical structure and is sometimes called the hydrophilicity parameter. The logP value can be calculated using software such as ChemBioDraw Ultra or HSPiP (Ver. 4.1.07). It can also be determined experimentally using the method of OECD Guidelines for the Testing of Chemicals, Section 1, Test No. 117. In the present invention, unless otherwise specified, the value calculated by inputting the structural formula of a compound into HSPiP (Ver. 4.1.07) is used as the logP value.

[0068] In the present invention, the content of the liquid crystal compound is preferably from 8 to 99% by mass, more preferably from 8 to 96% by mass, of the solid content in the polarizer-forming composition. Here, "solid content in the polarizer-forming composition" refers to the components excluding the solvent, and specific examples of solid content include the liquid crystal compounds and azo dyes described above, as well as the dichroic substances, polymerization initiators, surfactants, etc. described below.

[0069] <Azo dyes> The azo dye contained in the polarizer-forming composition is the same as the above-described azo dye of the present invention.

[0070] The polarizer-forming composition may contain a plurality of the above-mentioned azo dyes. When the polarizer-forming composition contains multiple azo dyes, it is preferable to use a combination of at least one azo dye having an absorption maximum wavelength in the above-mentioned wavelength range of 560 nm or more and less than 700 nm and at least one azo dye having an absorption maximum wavelength in the wavelength range of 370 nm or more and less than 560 nm, in order to make the resulting polarizer layer closer to black.

[0071] The azo dye may have a crosslinkable group. Specific examples of the crosslinkable group include a (meth)acryloyl group, an epoxy group, an oxetanyl group, and a styryl group, and among these, a (meth)acryloyl group is preferred.

[0072] <Dichroic substances> The polarizer-forming composition may contain a dichroic substance other than the azo dye. The dichroic substance other than the azo dye may also have a crosslinkable group. Specific examples of the crosslinkable group include a (meth)acryloyl group, an epoxy group, an oxetanyl group, and a styryl group, and among these, a (meth)acryloyl group is preferred. The dichroic material contained in the polarizer-forming composition is not particularly limited, and examples thereof include visible light-absorbing materials (dichroic dyes), luminescent materials (fluorescent materials, phosphorescent materials), ultraviolet-absorbing materials, infrared-absorbing materials, nonlinear optical materials, carbon nanotubes, and inorganic materials (e.g., quantum rods), and any conventionally known dichroic material (dichroic dye) can be used. Specifically, for example, paragraphs

[0067] to

[0071] of JP 2013-228706 A, paragraphs

[0008] to

[0026] of JP 2013-227532 A, paragraphs

[0008] to

[0015] of JP 2013-209367 A, and paragraphs

[0045] of JP 2013-14883 A ~

[0058] paragraph,

[0012] to

[0029] paragraphs of JP 2013-109090 A,

[0009] to

[0017] paragraphs of JP 2013-101328 A,

[0051] to

[0065] paragraphs of JP 2013-37353 A,

[0049] to

[0049] paragraphs of JP 2012-63387 A

[0073] Paragraphs

[0016] to

[0018] of JP 11-305036 A, paragraphs

[0009] to

[0011] of JP 2001-133630 A, paragraphs

[0030] to

[0169] of JP 2011-215337 A, paragraphs

[0021] to

[0075] of JP 2010-106242 A, paragraphs

[0011] to

[0025] of JP 2010-215846 A, paragraphs

[0017] to

[0069] of JP 2011-048311 A, paragraphs

[0013] to

[0133] of JP 2011-213610 A, paragraphs

[0011] to

[0133] of JP 2011-237513 A

[0074] Paragraphs

[0005] to

[0051] of JP 2016-006502 A, paragraphs

[0005] to

[0041] of WO2016 / 060173 A, paragraphs

[0008] to

[0062] of WO2016 / 136561 A, paragraphs

[0014] to

[0033] of WO2017 / 154835 A, paragraphs

[0014] to

[0033] of WO2017 / 154695 A, and paragraphs

[0005] to

[0033] of WO2017 / 195833 A.

[0013] to

[0037] of International Publication No. 2018 / 164252, paragraphs

[0014] to

[0034] of International Publication No. 2018 / 186503, paragraphs

[0021] to

[0030] of International Publication No. 2019 / 189345, paragraphs

[0043] to

[0063] of International Publication No. 2019 / 225468, paragraphs

[0043] to

[0085] of International Publication No. 2020 / 004106, and the like.

[0073] In the polarizer-forming composition, two or more dichroic substances other than the above-mentioned azo dyes may be used in combination.

[0074] In the present invention, the difference between the logP value of the azo dye and the logP value of the liquid crystal compound is preferably 5.0 or more, more preferably 7.0 or more, and even more preferably 7.0 or more and less than 10.0, for the reason that the display performance and durability of the image display device are improved. Here, when a plurality of azo dyes or liquid crystal compounds are used, the difference (absolute value) between the logP value of the azo dye and the logP value of the liquid crystal compound refers to the largest difference among the differences calculated from the logP values ​​of each compound.

[0075] The content of the azo dye and the dichroic substance other than the azo dye is preferably 1 to 400 parts by mass, more preferably 2 to 100 parts by mass, and even more preferably 5 to 30 parts by mass, relative to 100 parts by mass of the liquid crystal compound, in order to obtain better effects of the present invention. The content of the azo dye and the dichroic substance other than the azo dye is preferably 1 to 50 mass % of the solid content in the composition for forming a polarizer layer, and more preferably 2 to 40 mass %.

[0076] <Polymerization initiator> The composition for forming a polarizer layer preferably contains a polymerization initiator. The polymerization initiator is not particularly limited, but is preferably a photosensitive compound, that is, a photopolymerization initiator. As the photopolymerization initiator, various compounds can be used without any particular limitation. Examples of the photopolymerization initiator include α-carbonyl compounds (U.S. Pat. Nos. 2,367,661 and 2,367,670), acyloin ethers (U.S. Pat. No. 2,448,828), α-hydrocarbon-substituted aromatic acyloin compounds (U.S. Pat. No. 2,722,512), polynuclear quinone compounds (U.S. Pat. Nos. 3,046,127 and 2,951,758), and combinations of triarylimidazole dimers and p-aminophenyl ketones (U.S. Pat. No. 3,549,367). ), acridine and phenazine compounds (Japanese Patent Laid-Open No. 60-105667 and U.S. Pat. No. 4,239,850), oxadiazole compounds (U.S. Pat. No. 4,212,970), o-acyloxime compounds (Japanese Patent Laid-Open No. 2016-27384

[0065] ), and acylphosphine oxide compounds (Japanese Patent Publication No. 63-40799, Japanese Patent Publication No. 5-29234, Japanese Patent Laid-Open No. 10-95788, and Japanese Patent Laid-Open No. 10-29997). As such a photopolymerization initiator, commercially available products can be used, such as Irgacure-184, Irgacure-907, Irgacure-369, Irgacure-651, Irgacure-819, Irgacure-OXE-01, and Irgacure-OXE-02 manufactured by BASF.

[0077] When the polarizer layer-forming composition contains a polymerization initiator, the content of the polymerization initiator is preferably 0.01 to 30 parts by mass, and more preferably 0.1 to 15 parts by mass, relative to 100 parts by mass of the total of the azo dye, the dichroic substance other than azo dye, and the liquid crystal compound in the polarizer layer-forming composition. When the content of the polymerization initiator is 0.01 part by mass or more, the durability of the polarizer layer becomes good, and when it is 30 parts by mass or less, the degree of orientation of the polarizer layer becomes good. The polymerization initiator may be used alone or in combination of two or more. When two or more polymerization initiators are used, the total amount thereof is preferably within the above range.

[0078] <Surfactant> The composition for forming a polarizer layer preferably contains a surfactant. By including a surfactant, it is expected that the smoothness of the coating surface will be improved, the degree of orientation will be further improved, and repelling and unevenness will be suppressed, thereby improving in-plane uniformity. The surfactant is preferably one that aligns the dichroic substance and the liquid crystal compound horizontally on the coating surface side, and for example, the compounds described in paragraphs

[0155] to

[0170] of WO 2016 / 009648 and the compounds (horizontal alignment agents) described in paragraphs

[0253] to

[0293] of JP 2011-237513 A can be used.

[0079] The surfactant contained in the polarizer layer-forming composition of the present invention may be a fluorine-containing polymer having a repeating unit B1 represented by formula (B-1) described later and a repeating unit B2 having a fluorine atom.

[0080] (Repeating structure B1) The repeating unit B1 contained in the fluorine-containing polymer is a repeating unit represented by the following formula (B-1).

[0081] [ka]

[0082] In the above formula (B-1), R 1 represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogen atom. Also, L 1 represents a single bond or -CO-. Furthermore, Sp represents a linear or branched divalent hydrocarbon group having 1 to 20 carbon atoms, provided that one or two or more non-adjacent -CH2- groups among the -CH2- groups constituting a part of the hydrocarbon group may each independently be substituted with -O-, -S-, -NH-, or -N(Q)-, and Q represents a substituent. L 2 and L 3 each independently represents a single bond or a divalent linking group.

[0083] R in the above formula (B-1)1 is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and more preferably a hydrogen atom or a methyl group.

[0084] L in the above formula (B-1) 1 is preferably —CO—.

[0085] Examples of the linear or branched divalent hydrocarbon group having 1 to 20 carbon atoms represented by Sp in the above formula (B-1) include linear or branched divalent aliphatic hydrocarbon groups having 1 to 20 carbon atoms, divalent alicyclic hydrocarbon groups having 3 to 20 carbon atoms, divalent aromatic hydrocarbon groups having 6 to 20 carbon atoms, and divalent aromatic heterocyclic groups having 6 to 20 carbon atoms, and among these, linear or branched divalent aliphatic hydrocarbon groups having 1 to 20 carbon atoms are preferred. Here, the divalent aliphatic hydrocarbon group having 1 to 20 carbon atoms is preferably an alkylene group having 1 to 15 carbon atoms, more preferably an alkylene group having 1 to 8 carbon atoms, and specific examples thereof include a methylene group, an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, a methylhexylene group, and a heptylene group. As described above, Sp represents a -CH2- group constituting a part of a linear or branched divalent hydrocarbon group having 1 to 20 carbon atoms, in which one or two or more non-adjacent -CH2- groups may each independently be substituted with -O-, -S-, -NH-, or -N(Q)-. Examples of the substituent represented by Q include the substituent W described above, and among these, an alkyl group, an alkoxy group, or a halogen atom is preferred.

[0086] L in the above formula (B-1) 2 and L 3 Examples of the divalent linking group in one embodiment include -C(O)O-, -OC(O)-, -O-, -S-, and -C(O)NR L1 -, -NR L1 C(O)-, -SO2-, and -NR L1 R L2 In the formula, R L1 and R L2each independently represents a hydrogen atom or an optionally substituted alkyl group having 1 to 6 carbon atoms. Examples of the substituent that the alkyl group having 1 to 6 carbon atoms may have include the aforementioned substituent W, and among these, an alkyl group, an alkoxy group, or a halogen atom is preferred.

[0087] In the formula (B-1), A represents a divalent linking group represented by any one of the following formulae (A-1) to (A-15): 2 or L 3 The carbon atoms constituting the ring structures in the following formulae (A-1) to (A-15) may be substituted with heteroatoms or may have a substituent. Examples of the substituent that the carbon atoms constituting the ring structure may have include the above-mentioned substituent W, and among these, an alkyl group, an alkoxy group, or a halogen atom is preferred.

[0088] [ka] JPEG0007792469000016.jpg31136JPEG0007792469000017.jpg33136JPEG0007792469000018.jpg26133JPEG0007792469000019.jpg26110

[0089] Specific examples of the divalent linking group represented by any one of the above formulas (A-1) to (A-15) include a 1,4-phenylene group, a 1,4-cyclohexylene group, a 1,4-cyclohexenyl group, a tetrahydropyran-2,5-diyl group, a 1,4-piperazine group, a 1,4-piperidine group, a 1,3-dioxane-2,5-diyl group, a tetrahydrothiopyran-2,5-diyl group, a 1,4-bicyclo(2,2,2)octylene group, a decahydronaphthalene-2,6-diyl group, a pyridine-2,5-diyl group, and a pyrimidine-2,5-diyl group. yl group, pyrazine-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, 2,6-naphthylene group, phenanthrene-2,7-diyl group, 9,10-dihydrophenanthrene-2,7-diyl group, 1,2,3,4,4a,9,10a-octahydrophenanthrene-2,7-diyl group, 9-fluorenone-2,7-diyl, fluorene-2,7-diyl group, thienothiophene-3,6-diyl group, carbazole-3,6-diyl group, and carbazole-2,7-diyl group.

[0090] In the above formula (B-1), A is preferably a divalent linking group represented by any one of the above formulas (A-1), (A-4), (A-7), (A-10) and (A-13), and more preferably a divalent linking group represented by any one of the above formulas (A-7) and (A-13), because this results in a higher degree of orientation of the polarizer layer that is formed.

[0091] In the formula (B-1), D represents a hydrogen-bonding group composed of a hydrogen atom and a non-metallic atom of Groups 14 to 16. However, the non-metallic atom may have a substituent. Here, examples of non-metallic atoms of Groups 14 to 16 include oxygen atoms, sulfur atoms, nitrogen atoms, and carbon atoms. Furthermore, examples of substituents that non-metal atoms (particularly, nitrogen atoms and carbon atoms) may have include halogen atoms, alkyl groups, alkoxy groups, alkyl-substituted alkoxy groups, cyclic alkyl groups, aryl groups (e.g., phenyl groups, naphthyl groups, etc.), cyano groups, amino groups, nitro groups, alkylcarbonyl groups, sulfo groups, and hydroxyl groups.

[0092] Such hydrogen-bonding groups include, for example, hydrogen-bond donating groups and hydrogen-bond accepting groups. Specific examples of the hydrogen bond donor group include an amino group, an amide group, a urea group, a urethane group, a sulfonylamino group, a sulfo group, a phospho group, a hydroxy group, a mercapto group, a carboxyl group, a methylene group substituted with an electron-withdrawing group, and a methine group substituted with an electron-withdrawing group, and among these, a carboxyl group and an amide group are preferred. Specific examples of the hydrogen bond accepting group include a heteroatom having an unshared electron pair on a heterocycle, a hydroxy group, an aldehyde, a ketone, a carboxyl group, a carboxylic acid ester, a carboxylic acid amide, a lactone, a lactam, a sulfonic acid amide, a sulfo group, a phospho group, a phosphoric acid amide, a urethane, a urea, an ether structure (particularly a polymer structure having an oxygen atom contained in a polyether structure), an aliphatic amine, and an aromatic amine, and among these, a carboxyl group and an amide group are preferred.

[0093] (Repeated structure B2) The repeating unit B2 of the fluorine-containing polymer is a repeating unit containing a fluorine atom.

[0094] In the present invention, the content of repeating structure B2 is preferably 15 to 90 mass %, more preferably 20 to 80 mass %, and even more preferably 30 to 70 mass %, relative to the total mass of the surfactant, because this results in a higher degree of orientation of the polarizer layer that is formed. The surfactant may contain one type of repeating structure B2 alone or two or more types of repeating structure B2. When two or more types of repeating structure B2 are contained, the content of the repeating structure B2 refers to the total content of the repeating structure B2.

[0095] (Repeated structure B3) In the present invention, in order to improve the coatability of an upper layer onto the polarizer layer to be formed, it is preferable that the fluorine-containing polymer further contains, in addition to the repeating structures B1 and B2 described above, a repeating structure B3 derived from a monomer having a molecular weight of 300 or less.

[0096] The repeating structure B3 is preferably a repeating structure represented by the following formula (N-1), because this improves the coating properties of the upper layer on the polarizer layer to be formed. The repeating structure B3 has a structure different from the repeating structure B2 described above, and preferably does not contain a fluorine atom.

[0097] [ka]

[0098] In formula (N-1), R B11 and R B12 each independently represents a hydrogen atom or a substituent, provided that R B11 and R B12 is a substituent, R B11 and R B12 may be linked to form a ring.

[0099] R B11 Molecular weight and R B12 The total molecular weight of the repeating units B3 is preferably 200 or less, more preferably 100 or less, and even more preferably 70 or less. When the total molecular weight is 100 or less, the interaction between the repeating units B3 is further improved, and the compatibility between the surfactant and the liquid crystal molecules can be further reduced. This results in a polarizer layer with fewer alignment defects and an excellent degree of alignment. RB11 Molecular weight and R B12 The lower limit of the total molecular weight of the above is preferably 2 or more.

[0100] R B11 and R B12 The substituent represented by is preferably an organic group, more preferably an organic group having 1 to 15 carbon atoms, further preferably an organic group having 1 to 12 carbon atoms, and particularly preferably an organic group having 1 to 8 carbon atoms, in terms of achieving better effects of the present invention. Examples of the organic group include a linear, branched, or cyclic alkyl group, an aromatic hydrocarbon group, and a heterocyclic group.

[0101] The alkyl group preferably has 1 to 15 carbon atoms, more preferably 1 to 12 carbon atoms, and even more preferably 1 to 8 carbon atoms. The carbon atoms of the alkyl group are -O-, -Si(CH3)2-, and -(Si(CH3)2O). g -, -(OSi(CH3)2) g -(g represents an integer from 1 to 10.), -N(Z)-, -C(Z)=C(Z')-, -C(Z)=N-, -N=C(Z)-, -C(O)-, -OC( O)-, -C(O)O-, -OC(O)O-, -N(Z)C(O)-, -C(O)N(Z)-, -C(Z)=C(Z')-C(O)O-, -OC( O)-C(Z)=C(Z')-, -C(Z)=N-, -N=C(Z)-, -C(Z)=C(Z')-C(O)N(Z”)-, -N(Z”)-C(O )-C(Z)=C(Z')-, -C(Z)=C(Z')-C(O)-S-, -SC(O)-C(Z)=C(Z')-, -C(Z)=NN=C(Z' )-(Z, Z', and Z" each independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a cycloalkyl group, an aryl group, a cyano group, or a halogen atom), -C≡C-, -N=N-, -S-, -C(S)-, -S(O)-, -SO2-, -(O)S(O)O-, -O(O)S(O)O-, -SC(O)-, and -C(O)S-, as well as groups formed by combining two or more of these groups. Among the groups with which a carbon atom of the alkyl group may be substituted, -O-, -C(O)-, -N(Z)-, -OC(O)-, or -C(O)O- is preferred in terms of achieving better effects for the present invention. The hydrogen atoms of the alkyl group can be replaced by halogen atoms, cyano groups, aryl groups, nitro groups, -OZ H , -C(O)Z H , -C(O)OZ H , -OC(O)Z H , -OC(O)OZ H , -NZ H Z H ', -NZ H C(O)Z H ', -NZ H C(O)OZ H ', -C(O)NZ H Z H ',-OC(O)NZ H Z H ', -NZ H C(O)NZ H 'OZ H '', -SZ H , -C(S)Z H , -C(O)SZ H , or -SC(O)Z H , may be substituted with Z H , Z H ' and Z H Each of the symbols "" independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, a cyano group, or a nitro group. Among the groups that may be substituted with a hydrogen atom of the alkyl group, -OH, -COOH, or an aryl group (a phenyl group is preferred) is preferred in terms of achieving better effects of the present invention.

[0102] The hydrogen atoms of the aromatic hydrocarbon group and the hydrogen atoms of the heterocyclic group may be substituted with a halogen atom, a cyano group, an alkyl group having 1 to 10 carbon atoms, a cyano group, a nitro group, -OZ H , -C(O)Z H , -C(O)OZ H , -OC(O)Z H , -OC(O)OZ H , -NZ H Z H ', -NZ H C(O)Z H ', -NZ H C(O)OZ H ', -C(O)NZ H Z H ',-OC(O)NZH Z H ', -NZ H C(O)NZ H 'OZ H '', -SZ H , -C(S)Z H , -C(O)SZ H , -SC(O)Z H , and may be substituted with -B(OH)2. Z H , Z H ' and Z H Each of the symbols "" independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, a cyano group, or a nitro group. Among the groups with which the hydrogen atom of the aromatic hydrocarbon group and the hydrogen atom of the heterocyclic group may be substituted, -OH and -B(OH)2 are preferred in terms of achieving better effects of the present invention.

[0103] R B11 and R B12 are each independently preferably a hydrogen atom or an organic group having 1 to 15 carbon atoms, in terms of achieving better effects of the present invention. Preferred embodiments of the organic group are as described above. From the viewpoint of the better effect of the present invention, R B11 and R B12 At least one of the groups is preferably a substituent, and at least one of the groups is more preferably an organic group having 1 to 15 carbon atoms.

[0104] R B11 and R B12 The ring formed by linking is a heterocycle containing the nitrogen atom in formula (N-1), and may further contain heteroatoms such as oxygen atoms, sulfur atoms, and nitrogen atoms within the ring. R B11 and R B12 The ring formed by linking is preferably a 4- to 8-membered ring, more preferably a 5- to 7-membered ring, and even more preferably a 5- or 6-membered ring, in terms of achieving better effects of the present invention. R B11 and R B12 The number of carbon atoms constituting the ring formed by linking the groups is preferably 3 to 7, more preferably 3 to 6, in terms of achieving better effects of the present invention. RB11 and R B12 The ring formed by linking may or may not have aromaticity, but it is preferable that it does not have aromaticity in terms of better effects of the present invention. R B11 and R B12 Specific examples of the ring formed by linking the groups include the following groups.

[0105] [ka]

[0106] R B13 represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen atom or a cyano group, and among these, a hydrogen atom or an alkyl group having 1 to 5 carbon atoms is preferred, and a hydrogen atom is more preferred. The alkyl group has 1 to 5 carbon atoms, preferably 1 to 3, and more preferably 1. The alkyl group may have any of a linear, branched, or cyclic structure.

[0107] Specific examples of the repeating structure B3 are shown below, but the repeating structure B3 is not limited to the following structures.

[0108] [ka]

[0109] The content of repeating structure B3 is preferably 3 to 75 mass%, more preferably 15 to 70 mass%, and even more preferably 20 to 65 mass%, based on the total mass of all repeating structures of the fluorine-containing polymer. When the content of repeating structure B3 is within the above range, the effects of the present invention are more excellent. The surfactant may contain one type of repeating structure B3 alone or two or more types of repeating structure B3. When two or more types of repeating structure B3 are contained, the content of the repeating structure B3 refers to the total content of the repeating structure B3.

[0110] (Another repeating structure (part 1)) The above fluorine-containing polymer may further have a repeating unit represented by the following general formula (M-3).

[0111] [ka]

[0112] In the above formula (M-3), R3 represents a hydrogen atom, a fluorine atom, a chlorine atom, or an alkyl group having 1 to 20 carbon atoms, L3 represents a single bond or a divalent linking group, and T3 represents an aromatic ring. Examples of the linking group for L3 include the same groups as SP21 in the above formula (F-2). Examples of the aromatic ring group of T3 include aromatic hydrocarbon ring groups such as a benzene ring group, a naphthalene ring group, an anthracene ring group, and a phenanthroline ring group; and aromatic heterocyclic groups such as a furan ring group, a pyrrole ring group, a thiophene ring group, a pyridine ring group, a thiazole ring group, and a benzothiazole ring group. Among these, a benzene ring group (e.g., a 1,4-phenyl group) is preferred. By including these groups in the polymer, compatibility can be improved.

[0113] Specific examples of the monomer that forms the repeating structure represented by the above formula (M-3) include structures represented by the following formulas (M3-1) to (M3-5), but the present invention is not limited to these.

[0114] [ka]

[0115] (Other repeating structures (part 2)) The above fluorine-containing polymer may further have a repeating unit represented by the following general formula (M-4).

[0116] [ka]

[0117] In the above formula (M-4), R4 represents a hydrogen atom, a fluorine atom, a chlorine atom, or an alkyl group having 1 to 20 carbon atoms, L4 represents a single bond or a divalent linking group, and Q4 represents a crosslinkable group represented by any of the above formulas (P1) to (P30). Examples of the linking group for L4 include the same groups as SPW in the above formula (W1), such as aromatic hydrocarbon groups having 4 to 20 carbon atoms, cyclic alkylene groups having 4 to 20 carbon atoms, and heterocyclic groups having 1 to 20 carbon atoms. Of these, linear, branched, or cyclic alkylene groups having 1 to 20 carbon atoms and aromatic hydrocarbon groups having 4 to 20 carbon atoms are preferred, and it is preferred that they have -O-, -CO-O-, -CO-NH-, or -O-CO-.

[0118] When Q4 represents a group containing a cationically polymerizable group, the cationically polymerizable group is not particularly limited, and examples thereof include an alicyclic ether group, a cyclic acetal group, a cyclic lactone group, a cyclic thioether group, a spiro orthoester group, and a vinyloxy group. The cationic polymerizable group is preferably an alicyclic ether group or a vinyloxy group, more preferably an epoxy group, an oxetanyl group or a vinyloxy group, still more preferably an epoxy group or an oxetanyl group, and particularly preferably an epoxy group. The epoxy group is particularly preferably an alicyclic epoxy group. Each of the above groups may have a substituent. When Q4 represents a group containing a radically polymerizable group, the radically polymerizable group is not particularly limited and may be, for example, a group containing a polymerizable carbon-carbon double bond. Specific examples include a (meth)acryloyl group, a (meth)acryloyloxy group, a (meth)acrylamide group, a vinyl group, a styryl group, and an allyl group, with a (meth)acryloyloxy group being preferred. Each of the above groups may have a substituent. By including such a group, adhesion between layers can be improved when a plurality of polarizer layers are stacked.

[0119] Specific examples of the monomer that forms the repeating structure represented by formula (M-4) above include the monomers represented by formulas (M4-1) to (M4-17) below, but the present invention is not limited to these.

[0120] [ka]

[0121] The fluorine-containing polymer may be a polymer having a block structure, a graft structure, a branch structure, or a star structure, which is preferable in that the fluorine atom groups exist as agglomerates, improving the migration of the polymer to the coating film surface. Furthermore, in copolymers having a random structure in which the fluorine-substituted alkyl chain length is 1 to 4, the fluorine atom groups are small in agglomerates, and although they have excellent solubility in common solvents, they have low migration to the coating film surface. On the other hand, the above polymers have high migration to the coating film surface even when the fluorine-substituted alkyl chain length is 1 to 4, due to the presence of the fluorine atom groups as agglomerates. Adding such copolymers to the composition is preferred because it reduces the surface tension of the coating film and improves the wettability of the composition to the substrate during coating (uniform coatability) and the surface condition of the coating film.

[0122] In the present invention, when the polarizer-forming composition contains a surfactant, the difference between the logP value of the surfactant and the logP value of the liquid crystal compound is preferably less than 3.1, more preferably less than 1.4, and even more preferably 0 or more and less than 1.4, for the reason that the display performance and durability of the image display device are improved. Here, when a plurality of surfactants or liquid crystal compounds are used, the difference (absolute value) between the logP value of the surfactant and the logP value of the liquid crystal compound refers to the smallest difference among the differences calculated from the logP values ​​of each compound.

[0123] When the composition for forming a polarizer layer contains a surfactant, the content of the surfactant is preferably 0.001 to 5 parts by mass, more preferably 0.01 to 3 parts by mass, per 100 parts by mass of the total of the azo dye, the dichroic substance other than the azo dye, and the liquid crystal compound in the composition for forming a polarizer layer. The surfactant may be used alone or in combination of two or more. When two or more surfactants are used, the total amount thereof is preferably within the above range.

[0124] <Adhesion improver> The polarizer layer-forming composition may contain an adhesion improver from the viewpoint of adhesion to a barrier layer described later. Examples of the adhesion improver include compounds containing a hydroxyl group, a carboxyl group, or a boronic acid group, and compounds containing a boronic acid group are preferred. Suitable examples of the compound containing a boronic acid group include compounds represented by the following formula:

[0125] [ka]

[0126] In the formula, R 1 and R 2 R each independently represents a hydrogen atom, or a substituted or unsubstituted aliphatic hydrocarbon group, aryl group, or heterocyclic group. 3 represents a substituent containing a functional group capable of bonding to a (meth)acrylic group.

[0127] <Solvent> The composition for forming a polarizer layer preferably contains a solvent from the viewpoint of workability and the like. Examples of the solvent include ketones (e.g., acetone, 2-butanone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, etc.), ethers (e.g., dioxane, tetrahydrofuran, 2-methyltetrahydrofuran, cyclopentyl methyl ether, tetrahydropyran, dioxolane, etc.), aliphatic hydrocarbons (e.g., hexane, etc.), alicyclic hydrocarbons (e.g., cyclohexane, etc.), aromatic hydrocarbons (e.g., benzene, toluene, xylene, trimethylbenzene, etc.), halogenated carbons (e.g., dichloromethane, trichloromethane, dichloroethane, dichlorobenzene, chlorotoluene, etc.), esters (e.g., acetic acid, Examples of suitable solvents include organic solvents such as methyl alcohol, ethyl acetate, butyl acetate, ethyl lactate, etc., alcohols (e.g., ethanol, isopropanol, butanol, cyclohexanol, isopentyl alcohol, neopentyl alcohol, diacetone alcohol, benzyl alcohol, etc.), cellosolves (e.g., methyl cellosolve, ethyl cellosolve, 1,2-dimethoxyethane, etc.), cellosolve acetates, sulfoxides (e.g., dimethyl sulfoxide, etc.), amides (e.g., dimethylformamide, dimethylacetamide, N-methylpyrrolidone, N-ethylpyrrolidone, etc.), and heterocyclic compounds (e.g., pyridine, etc.), as well as water. These solvents may be used alone or in combination of two or more. Of these solvents, from the viewpoint of utilizing the effect of excellent solubility of the composition for forming a polarizer layer, ketones (particularly cyclopentanone and cyclohexanone), ethers (particularly tetrahydrofuran, cyclopentyl methyl ether, tetrahydropyran, and dioxolane), and amides (particularly dimethylformamide, dimethylacetamide, N-methylpyrrolidone, and N-ethylpyrrolidone) are preferred.

[0128] When the composition for forming a polarizer layer contains a solvent, the content of the solvent is preferably 80 to 99 mass %, more preferably 83 to 97 mass %, and particularly preferably 85 to 95 mass %, relative to the total mass of the composition for forming a polarizer layer. The solvent may be used alone or in combination of two or more. When two or more solvents are used, the total amount thereof is preferably within the above range.

[0129] <Method of manufacturing polarizer layer> Although the method for producing a polarizer layer is not particularly limited, a method (hereinafter also referred to as "the present production method") that includes, in this order, a step of applying the above-mentioned present composition onto an alignment film to form a coating film (hereinafter also referred to as "coating film formation step") and a step of orienting the azo dye and the dichroic material other than the azo dye contained in the coating film (hereinafter also referred to as "orientation step") is preferred, because this results in a higher degree of orientation of the resulting polarizer layer. Each step will be described below.

[0130] (Coating film formation process) The coating film forming step is a step of forming a coating film by applying the above-described polarizer layer-forming composition onto an alignment film. The liquid crystal compound in the coating film is horizontally aligned due to the interaction between the alignment film and the interface modifier (if the composition contains an interface modifier). By using the present composition containing the above-mentioned solvent or by using the present composition in a liquid state such as a melt by heating, it becomes easy to apply the present composition onto the alignment film. Examples of methods for applying the present composition include known methods such as roll coating, gravure printing, spin coating, wire bar coating, extrusion coating, direct gravure coating, reverse gravure coating, die coating, spraying, and inkjet printing.

[0131] (Alignment film) The alignment film used in the coating film using step will be described. The alignment film may be any film that can horizontally align the liquid crystal compound contained in the composition. The alignment layer can be formed by rubbing an organic compound (preferably a polymer) onto the film surface, oblique vapor deposition of an inorganic compound, formation of a layer with microgrooves, or accumulation of an organic compound (e.g., ω-tricosanoic acid, dioctadecylmethylammonium chloride, methyl stearate) by the Langmuir-Blodgett method (LB film). Furthermore, alignment layers that exhibit alignment function upon application of an electric field, a magnetic field, or light irradiation are also known. Among these, in the present invention, alignment layers formed by rubbing are preferred in terms of ease of control of the pretilt angle of the alignment layer, and photo-alignment layers formed by light irradiation are also preferred in terms of uniformity of alignment.

[0132] (1) Rubbed alignment film Polymer materials used for the alignment film formed by rubbing treatment are described in many literatures, and many commercially available products are available. In the present invention, polyvinyl alcohol or polyimide, and derivatives thereof are preferably used. For details of the alignment film, see WO 2001 / 88574 A1, page 43, line 24 to page 49, line 8. The thickness of the alignment film is preferably 0.01 to 10 μm, and more preferably 0.01 to 2 μm.

[0133] (2) Photo-alignment film Photo-alignment materials used for alignment films formed by light irradiation are described in many documents, etc. In the present invention, for example, azo compounds described in JP-A Nos. 2006-285197, 2007-76839, 2007-138138, 2007-94071, 2007-121721, 2007-140465, 2007-156439, 2007-133184, 2009-109831, Japanese Patent Nos. 3883848 and 4151746, and compounds described in JP-A No. 2002-229039 are used. Preferred examples include aromatic ester compounds of the above, maleimide and / or alkenyl-substituted nadimide compounds having a photoalignment unit described in JP-A Nos. 2002-265541 and 2002-317013, photocrosslinkable silane derivatives described in Japanese Patent Nos. 4205195 and 4205198, and photocrosslinkable polyimides, polyamides, or esters described in JP-A Nos. 2003-520878 and 2004-529220, or JP-A No. 4162850. Azo compounds, photocrosslinkable polyimides, polyamides, or esters are more preferred.

[0134] Of these, it is preferable to use, as the photoalignment compound, a photosensitive compound having a photoreactive group that undergoes at least one of dimerization and isomerization by the action of light. Examples of the photoreactive group include a group having a cinnamoyl structure (skeleton), a group having a coumarin structure (skeleton), a group having a chalcone structure (skeleton), a group having a benzophenone structure (skeleton), and a group having an anthracene structure (skeleton). Among these groups, a group having a cinnamoyl structure and a group having a coumarin structure are preferred, and a group having a cinnamoyl structure is more preferred.

[0135] The photosensitive compound having the photoalignable group may further have a crosslinkable group. The crosslinkable group is preferably a thermally crosslinkable group that undergoes a curing reaction due to the action of heat, or a photocrosslinkable group that undergoes a curing reaction due to the action of light, and may be a crosslinkable group having both a thermally crosslinkable group and a photocrosslinkable group. Examples of the crosslinkable group include at least one selected from the group consisting of an epoxy group, an oxetanyl group, a group represented by -NH-CH2-OR (R represents a hydrogen atom or an alkyl group having 1 to 20 carbon atoms), a group having an ethylenically unsaturated double bond, and a blocked isocyanate group. Of these, an epoxy group, an oxetanyl group, and a group having an ethylenically unsaturated double bond are preferred. The three-membered cyclic ether group is also called an epoxy group, and the four-membered cyclic ether group is also called an oxetanyl group. Specific examples of the group having an ethylenically unsaturated double bond include a vinyl group, an allyl group, a styryl group, an acryloyl group, and a methacryloyl group, with an acryloyl group or a methacryloyl group being preferred.

[0136] A photo-alignment film formed from the above material is irradiated with linearly polarized or non-polarized light to produce a photo-alignment film. In this specification, "irradiation with linearly polarized light" and "irradiation with non-polarized light" refer to operations for causing a photoreaction in a photoalignment material. The wavelength of the light used varies depending on the photoalignment material used, and is not particularly limited as long as it is the wavelength necessary for the photoreaction. The peak wavelength of the light used for photoirradiation is preferably 200 nm to 700 nm, and ultraviolet light with a peak wavelength of 400 nm or less is more preferred.

[0137] Examples of light sources used for light irradiation include commonly used light sources, such as lamps such as tungsten lamps, halogen lamps, xenon lamps, xenon flash lamps, mercury lamps, mercury xenon lamps, and carbon arc lamps, various lasers [e.g., semiconductor lasers, helium-neon lasers, argon ion lasers, helium-cadmium lasers, and YAG (yttrium-aluminum-garnet) lasers], light-emitting diodes, and cathode ray tubes.

[0138] As a means for obtaining linearly polarized light, a method using a polarizer (e.g., an iodine polarizer, a dichroic material polarizer, and a wire grid polarizer), a method using a prism element (e.g., a Glan-Thompson prism) or a reflective polarizer utilizing the Brewster angle, or a method using light emitted from a polarized laser light source can be employed. Alternatively, a filter or a wavelength conversion element may be used to selectively irradiate only light of the required wavelength.

[0139] When the light to be irradiated is linearly polarized light, the light is irradiated from the top or back surface of the alignment film perpendicularly or obliquely to the surface of the alignment film. The incident angle of the light varies depending on the photo-alignment material, but is preferably 0 to 90° (perpendicular), and more preferably 40 to 90°. In the case of non-polarized light, the non-polarized light is irradiated onto the alignment film obliquely, preferably at an incident angle of 10 to 80°, more preferably 20 to 60°, and particularly preferably 30 to 50°. The irradiation time is preferably 1 to 60 minutes, more preferably 1 to 10 minutes.

[0140] When patterning is required, a method of irradiating light using a photomask the number of times required to form a pattern, or a method of writing a pattern by laser light scanning can be used.

[0141] The alignment film may be formed on any substrate, or the substrate itself may also serve as the alignment film. The substrate for the alignment film may be appropriately selected, and examples thereof include glass and polymer films. The light transmittance of the substrate is preferably 80% or more. When a polymer film is used as the substrate, it is preferable to use an optically isotropic polymer film. Specific examples and preferred embodiments of the polymer are described in paragraph

[0013] of JP-A-2002-22942. Furthermore, even if a conventionally known polymer is prone to exhibiting birefringence, such as polycarbonate or polysulfone, it is also possible to use a polymer whose exhibiting property has been reduced by molecular modification as described in WO-A-2000 / 26705.

[0142] The alignment film and the substrate of the alignment film may be removed from the laminate and not left behind, or may be left behind. A method for not leaving the alignment film and the substrate of the alignment film in the laminate includes forming a polarizer layer on the alignment film, and then bonding the surface of the polarizer layer to a material constituting the laminate, such as a substrate, and then peeling off the substrate of the alignment film. Alternatively, in this case, only the substrate of the alignment film may be removed, leaving only the alignment film in the laminate.

[0143] (Orientation process) The alignment step is a step of aligning the liquid crystalline component contained in the coating film, thereby obtaining the polarizer layer of the present invention. The orientation step may include a drying treatment. By the drying treatment, components such as the solvent can be removed from the coating film. The drying treatment may be performed by leaving the coating film at room temperature for a predetermined time (for example, natural drying), or by heating and / or blowing air. Here, the liquid crystalline component contained in the polarizer layer-forming composition may be aligned by the coating film-forming step or drying treatment described above. For example, in an embodiment in which the polarizer layer-forming composition is prepared as a coating liquid containing a solvent, the coating film is dried to remove the solvent from the coating film, thereby obtaining a polarizer layer. When the drying treatment is carried out at a temperature equal to or higher than the transition temperature of the liquid crystal component contained in the coating film to the liquid crystal phase, the heating treatment described below does not need to be carried out.

[0144] The transition temperature of the liquid crystalline component contained in the coating film to the liquid crystal phase is preferably 10 to 250°C, more preferably 25 to 190°C, from the viewpoint of manufacturability, etc. A transition temperature of 10°C or higher is preferred because it does not require a cooling process or the like to lower the temperature to the temperature range in which the liquid crystal phase is exhibited. Furthermore, a transition temperature of 250°C or lower is preferred because it does not require a high temperature even when the film is once converted to an isotropic liquid state at a temperature higher than the temperature range in which the liquid crystal phase is exhibited, thereby reducing waste of thermal energy and deformation and deterioration of the substrate.

[0145] The alignment step preferably includes a heat treatment, which allows the liquid crystal component contained in the coating film to be aligned, and therefore the heat-treated coating film can be suitably used as a light polarizer layer. From the viewpoint of manufacturability, the heat treatment temperature is preferably 10 to 250° C., more preferably 25 to 190° C. The heating time is preferably 1 to 300 seconds, more preferably 1 to 60 seconds.

[0146] The alignment step may include a cooling treatment carried out after the heating treatment. The cooling treatment is a treatment in which the coated film after heating is cooled to about room temperature (20 to 25°C). This allows the alignment of the liquid crystalline component contained in the coated film to be fixed. The cooling method is not particularly limited and can be carried out by a known method. Through the above steps, a polarizer layer can be obtained. In this embodiment, the liquid crystal component contained in the coating film is aligned by drying treatment, heating treatment, or the like, but the method is not limited thereto and can be implemented by any known alignment treatment.

[0147] (Other processes) The method for producing a polarizer layer may include a step of curing the polarizer layer (hereinafter also referred to as a "curing step") after the above-mentioned alignment step. For example, when the polarizer layer has a crosslinkable group (polymerizable group), the curing step is carried out by heating and / or light irradiation (exposure). Among these, the curing step is preferably carried out by light irradiation. The light source used for curing can be various light sources such as infrared light, visible light, or ultraviolet light, but ultraviolet light is preferred. Furthermore, ultraviolet light may be irradiated while heating during curing, or ultraviolet light may be irradiated through a filter that transmits only specific wavelengths. When the exposure is carried out while heating, the heating temperature during exposure is preferably 25 to 140° C., although it depends on the transition temperature to a liquid crystal phase of the liquid crystalline component contained in the polarizer layer. The exposure may be carried out in a nitrogen atmosphere. When the curing of the polarizer layer proceeds by radical polymerization, exposure is preferably carried out in a nitrogen atmosphere because inhibition of polymerization by oxygen is reduced.

[0148] [Optical anisotropic film] The laminate of the present invention also preferably has an optically anisotropic film. Here, the optically anisotropic film refers to any film that generates a phase difference, and examples thereof include a stretched polymer film and a phase difference film having an optically anisotropic layer having an oriented liquid crystal compound on a support. Here, there is no particular limitation on the alignment direction of the liquid crystal compound contained in the optically anisotropic layer, and examples thereof include horizontal, vertical and twisted alignment with respect to the film surface. Specific functions of the optically anisotropic film include, for example, a λ / 4 plate and a λ / 2 plate. The optically anisotropic layer may be composed of a plurality of layers. For details of an optically anisotropic layer composed of a plurality of optically anisotropic layers, see, for example, paragraphs

[0008] to

[0053] of JP-A-2014-209219. The optically anisotropic film and the polarizer layer may be provided in contact with each other, or another layer may be provided between them, such as an adhesive layer or a pressure-sensitive adhesive layer for ensuring adhesion.

[0149] In the laminate of the present invention, it is preferable to use a λ / 4 plate as the optically anisotropic film, and it is more preferable to have a λ / 4 plate on the polarizer layer. Here, a "λ / 4 plate" is a plate having a λ / 4 function, specifically, a plate having the function of converting linearly polarized light of a specific wavelength into circularly polarized light (or circularly polarized light into linearly polarized light). For example, specific examples of a λ / 4 plate having a single layer structure include a stretched polymer film and a retardation film having an optically anisotropic layer with λ / 4 function provided on a support, and specific examples of a λ / 4 plate having a multi-layer structure include a broadband λ / 4 plate formed by laminating a λ / 4 plate and a λ / 2 plate.

[0150] [Barrier layer] The laminate of the present invention may have a barrier layer on the polarizer layer. Here, the barrier layer is also called a gas barrier layer (oxygen barrier layer), and has the function of protecting the polarizing element of the present invention from gases such as oxygen in the atmosphere, moisture, or compounds contained in adjacent layers. For the barrier layer, reference can be made to the descriptions in, for example, paragraphs

[0014] to

[0054] of JP 2014-159124 A, paragraphs

[0042] to

[0075] of JP 2017-121721 A, paragraphs

[0045] to

[0054] of JP 2017-115076 A, paragraphs

[0010] to

[0061] of JP 2012-213938 A, and paragraphs

[0021] to

[0031] of JP 2005-169994 A.

[0151] [Adhesive layer] The laminate according to the first aspect of the present invention preferably has at least one pressure-sensitive adhesive layer between the two substrates described above. Furthermore, the laminates according to the second and third aspects of the present invention have at least one pressure-sensitive adhesive layer between the two substrates described above. Such a pressure-sensitive adhesive layer is not particularly limited, but can be suitably used, for example, between a substrate and a polarizer layer, between a polarizer layer and an optically anisotropic layer, or between a substrate and an optically anisotropic layer.

[0152] Examples of adhesives contained in the adhesive layer include rubber-based adhesives, acrylic-based adhesives, silicone-based adhesives, urethane-based adhesives, vinyl alkyl ether-based adhesives, polyvinyl alcohol-based adhesives, polyvinylpyrrolidone-based adhesives, polyacrylamide-based adhesives, and cellulose-based adhesives. Acrylic-based adhesives are preferred from the viewpoints of transparency, weather resistance, heat resistance, and the like. Materials described in paragraphs

[0034] to

[0057] of JP 2014-152198 A are also preferably used.

[0153] The adhesive layer can be formed, for example, by a method in which a solution of the adhesive is applied to a release sheet, dried, and then transferred to the surface of the transparent resin layer; or a method in which a solution of the adhesive is applied directly to the surface of the transparent resin layer and dried; or the like. The adhesive solution is prepared as a solution of about 10 to 40 mass % by dissolving or dispersing the adhesive in a solvent such as toluene or ethyl acetate. Examples of the coating method include roll coating methods such as reverse coating and gravure coating, spin coating, screen coating, fountain coating, dipping, and spraying.

[0154] Examples of materials constituting the release sheet include suitable thin sheets such as synthetic resin films such as polyethylene, polypropylene, and polyethylene terephthalate; rubber sheets; paper; cloth; nonwoven fabrics; nets; foam sheets; and metal foils.

[0155] The laminate of the present invention may have a plurality of pressure-sensitive adhesive layers, which may have the same or different components and thicknesses.

[0156] In the present invention, it is desirable that the pressure-sensitive adhesive contains as few compounds as possible that can accelerate the decomposition reaction of the azo dye in order to enhance the discoloration resistance of the laminate. Here, examples of compounds that can accelerate the decomposition reaction of the azo dye include water, reducing agents, nucleophilic compounds, acids, bases, etc. To prevent discoloration of the azo dye, it is particularly preferable to suppress the presence of water and reducing agents.

[0157] In particular, the content of the reducing agent in each of the at least one adhesive layer is 0.04 g / m because discoloration resistance is better. 2 Preferably, it is 0.03 g / m or less. 2 More preferably, it is: For the same reason, when there are multiple adhesive layers, the total content of the reducing agent in all the adhesive layers is 0.04 g / m 2 Preferably, it is 0.03 g / m or less.2 More preferably, it is:

[0158] Water itself is nucleophilic and promotes the decomposition of azo bonds, and also promotes reactions with reducing agents, acids, and bases, so it is desirable to limit its amount. In the laminate of the present invention, the amount of moisture present between the two substrates is 0.8 g / m 2 Preferably, it is 0.7 g / m or less. 2 More preferably, it is 0.6 g / m or less. 2 More preferably, it is 0.4 g / m or less. 2 It is particularly preferable that the content is 0.3 g / m or less. 2 It is most preferable that the amount of moisture present between the two substrates in the laminate according to the first aspect of the present invention is 0.9 g / m or less. 2 The following is the result.

[0159] Here, the moisture content is measured by measuring the change between the initial mass of the laminate to be measured and the dry mass after decomposition and drying at 120°C for 2 hours (initial mass - dry mass), and then converting the result into a value per unit area. The initial mass is the mass measured immediately after leaving the laminate to be measured in an environment of a temperature of 25° C. and a relative humidity of 60% for three days. The dry mass after decomposition is the mass measured immediately after peeling off one of the two substrates within 30 minutes after measuring the initial mass and drying at 120°C for 2 hours.

[0160] In addition, in order to reduce the amount of moisture introduced between the two substrates of the laminate and make it easier to adjust the moisture content within the above-mentioned range, it is preferable that the moisture content of the adhesive layer is 0.4% or less, and more preferably 0.3% or less. Here, the moisture content refers to the value measured using a Karl Fischer moisture meter after leaving the pressure-sensitive adhesive layer to be measured in an environment of a temperature of 25°C and a relative humidity of 60% for 3 days. When a commercially available pressure-sensitive adhesive layer is used in the laminate of the present invention, the measurement can be performed with the liner of the commercially available pressure-sensitive adhesive layer peeled off. The moisture content of the pressure-sensitive adhesive layer can be adjusted by, for example, drying the pressure-sensitive adhesive layer in an environment with a lower relative humidity than the environment in which the laminate will be produced before the laminate is produced.

[0161] Since reducing agents can easily decompose azo bonds, it is desirable to limit the amount present. Examples of reducing agents include phenolic compounds such as p-methoxyphenol, cresol, t-butylcatechol, 3,5-di-t-butyl-4-hydroxytoluene, 2,2'-methylenebis(4-methyl-6-t-butylphenol), 2,2'-methylenebis(4-ethyl-6-t-butylphenol), 4,4'-thiobis(3-methyl-6-t-butylphenol), 4-methoxy-1-naphthol, and 4,4'-dialkoxy-2,2'-bi-1-naphthol; quinone compounds such as hydroquinone, methylhydroquinone, tert-butylhydroquinone, p-benzoquinone, methyl-p-benzoquinone, tert-butyl-p-benzoquinone, 2,5-diphenylbenzoquinone, 2-hydroxy-1,4-naphthoquinone, 1,4-naphthoquinone, 2,3-dichloro-1,4-naphthoquinone, anthraquinone, and diphenoquinone; Amine compounds such as p-phenylenediamine, 4-aminodiphenylamine, N,N'-diphenyl-p-phenylenediamine, Ni-propyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, N,N'-di-2-naphthyl-p-phenylenediamine, diphenylamine, N-phenyl-β-naphthylamine, 4,4'-dicumyl-diphenylamine, 4,4'-dioctyl-diphenylamine, etc.; thioether compounds such as phenothiazine and distearyl thiodipropionate; N-nitrosodiphenylamine, N-nitrosophenylnaphthylamine, N-nitrosodinaphthylamine, p-nitrosophenol, nitrosobenzene, p-nitrosodiphenylamine, α-nitroso-β-naphthol, etc., N,N-dimethyl p-nitrosoaniline, p-nitrosodiphenylamine, p-nitronedimethylamine, p-nitrone-N,N-diethylamine, N-nitrosoethanolamine, N-nitrosodi-n-butylamine, N-nitroso-N nitroso compounds such as n-butyl-4-butanolamine, N-nitroso-diisopropanolamine, N-nitroso-N-ethyl-4-butanolamine, 5-nitroso-8-hydroxyquinoline, N-nitrosomorpholine, N-nitroso-N-phenylhydroxylamine ammonium salt, nitrosobenzene, 2,4,6-tri-tert-butylnitrobenzene, N-nitroso-N-methyl-p-toluenesulfonamide, N-nitroso-N-ethylurethane, N-nitroso-Nn-propylurethane, 1-nitroso-2-naphthol, 2-nitroso-1-naphthol, sodium 1-nitroso-2-naphthol-3,6-sulfonate, sodium 2-nitroso-1-naphthol-4-sulfonate, 2-nitroso-5-methylaminophenol hydrochloride, 2-nitroso-5-methylaminophenol hydrochloride; In addition, hydrazines such as hydrazine, methylhydrazine, 1,1-dimethylhydrazine, and phenylhydrazine, and pyrrolidones such as N-methylpyrrolidone, N-ethylpyrrolidone, and N-vinylpyrrolidone also act as reducing agents for azo bonds.

[0162] The amount of reducing agent present between the two substrates of the laminate was 0.04 g / m 2 Preferably, it is 0.03 g / m or less. 2 More preferably, it is:

[0163] In the laminates according to the first and third aspects of the present invention, the thickness of the adhesive layer is not particularly limited, but is preferably 3 μm to 220 μm. In the laminates according to the first and third aspects of the present invention, the thickness of each of at least one pressure-sensitive adhesive layer is preferably 100 μm or more, more preferably 100 to 300 μm, and even more preferably 100 to 220 μm, for reasons that make the effects of the present invention more pronounced.

[0164] In the laminates according to the first and third aspects of the present invention, when there are multiple pressure-sensitive adhesive layers, the total thickness of the pressure-sensitive adhesive layers is preferably 15 μm to 250 μm, more preferably 20 μm to 70 μm, and even more preferably 25 μm to 50 μm.

[0165] In the laminate according to the second aspect of the present invention, the thickness of the adhesive layer (total thickness if there are multiple adhesive layers) is 70 μm or less, but is preferably 50 μm or more for the reason that the effects of the present invention become more apparent.

[0166] <Low moisture permeability layer> The laminates according to the first and second aspects of the present invention preferably have at least one low-moisture-permeable layer between the two substrates described above, and more preferably have at least one low-moisture-permeable layer between the polarizer layer and the pressure-sensitive adhesive layer, in order to prevent moisture from moving into the polarizer layer. Moreover, the laminate according to the third aspect of the present invention has at least one low-moisture-permeable layer between the two substrates described above. Such a low moisture permeable layer may be a single layer or multiple layers. When pressure-sensitive adhesive layers are located on both sides of the polarizer layer, low-moisture-permeable layers may be present on both sides of the polarizer layer, respectively.

[0167] Examples of materials for the low moisture permeable layer include olefin resins, acrylic resins, and polyethylene terephthalate resins. The olefin resin referred to here includes linear polyolefin resins and cyclic polyolefin resins. These resin films can be films formed by melt extrusion of raw resins, uniaxially stretched films obtained by stretching laterally after film formation, or biaxially stretched films obtained by stretching longitudinally and then laterally after film formation.

[0168] Of these, it is preferable that at least one low moisture-permeable layer contains a cyclic polyolefin resin, as this will provide better effects of the present invention.

[0169] Cyclic polyolefin resins are obtained by polymerizing cyclic olefin monomers such as norbornene and other cyclopentadiene derivatives in the presence of a catalyst.

[0170] Examples of cyclic polyolefin resins include resins obtained by ring-opening metathesis polymerization of norbornene or a derivative thereof obtained by the Diels-Alder reaction of cyclopentadiene and an olefin, or (meth)acrylic acid or an ester thereof, followed by hydrogenation; resins obtained by ring-opening metathesis polymerization of tetracyclododecene or a derivative thereof obtained by the Diels-Alder reaction of dicyclopentadiene and an olefin, or (meth)acrylic acid or an ester thereof, followed by hydrogenation; resins obtained by ring-opening metathesis copolymerization of at least two monomers selected from norbornene, tetracyclododecene, their derivatives, and other cyclic olefin monomers, followed by hydrogenation; and resins obtained by addition copolymerization of a chain olefin and / or an aromatic compound having a vinyl group to a cyclic olefin such as norbornene, tetracyclododecene, or a derivative thereof.

[0171] Cyclic polyolefin resins are readily available commercially, and examples of such products include "TOPAS," manufactured by TOPAS ADVANCED POLYMERS GmbH and sold in Japan by Polyplastics Co., Ltd., "ARTON (registered trademark)" sold by JSR Corporation, "ZEONOR (registered trademark)" and "ZEONEX (registered trademark)" sold by Zeon Corporation, and "APEL (registered trademark)" sold by Mitsui Chemicals, Inc.

[0172] Typical examples of linear polyolefin resins are polyethylene resins and polypropylene resins. Among them, propylene homopolymers and copolymers mainly composed of propylene and copolymerizable comonomers such as ethylene in an amount of 1 to 20 mass %, preferably 3 to 10 mass %, are preferably used.

[0173] The polypropylene resin may contain an alicyclic saturated hydrocarbon resin. By containing the alicyclic saturated hydrocarbon resin, the retardation value can be easily controlled. The content of the alicyclic saturated hydrocarbon resin is advantageously 0.1 to 30% by mass, more preferably 3 to 20% by mass, based on the polypropylene resin.

[0174] The acrylic resin is typically a polymer containing 50% by mass or more of methyl methacrylate units. The content of methyl methacrylate units is preferably 70% by mass or more, and may be 100% by mass.

[0175] Acrylic resins containing methyl methacrylate as a main component are readily available commercially, and examples of such products include "Sumipex (registered trademark)" sold by Sumitomo Chemical Co., Ltd., "Acrypet (registered trademark)" sold by Mitsubishi Rayon Co., Ltd., "Delpet (registered trademark)" sold by Asahi Kasei Corporation, "Parapet (registered trademark)" sold by Kuraray Co., Ltd., and "Acryviewer (registered trademark)" sold by Nippon Shokubai Co., Ltd.

[0176] Polyethylene terephthalate resin refers to a resin in which 80 mol% or more of the repeating units are composed of ethylene terephthalate, and other dicarboxylic acid components or diol components may be copolymerized. Examples of other dicarboxylic acid components include isophthalic acid, 4,4'-dicarboxydiphenyl, 4,4'-dicarboxybenzophenone, bis(4-carboxyphenyl)ethane, adipic acid, sebacic acid, and 1,4-dicarboxycyclohexane. Examples of other diol components include propylene glycol, butanediol, neopentyl glycol, diethylene glycol, cyclohexanediol, ethylene oxide adducts of bisphenol A, polyethylene glycol, polypropylene glycol, and polytetramethylene glycol.

[0177] These other dicarboxylic acid components and diol components can be used in combination of two or more types as needed. Also, oxycarboxylic acids such as p-hydroxybenzoic acid and p-β-hydroxyethoxybenzoic acid can be used in combination. Furthermore, dicarboxylic acid components or diol components containing small amounts of amide bonds, urethane bonds, ether bonds, carbonate bonds, etc. may be used as other copolymerization components.

[0178] Polyethylene terephthalate resin films are readily available as commercially available products, and examples of such products include "Diafoil (registered trademark)," "Hostafan (registered trademark)," and "Fusion (registered trademark)" sold by Mitsubishi Plastics, Inc., "Teijin Tetron Film (registered trademark)," "Melinex (registered trademark)," "Mylar (registered trademark)," and "Teflex (registered trademark)" sold by Teijin DuPont Films Co., Ltd., and "Toyobo Ester Film (registered trademark)" and "Toyobo Espet Film (registered trademark)" sold by Toyobo Co., Ltd. Examples of polyethylene terephthalate resin films include "Cosmoshine (registered trademark)", "Cosmoshine (registered trademark)" and "Crisper (registered trademark)" sold by Toray Advanced Film Co., Ltd., "Lumirror (registered trademark)" sold by Toray Advanced Film Co., Ltd., "Emblon (registered trademark)" and "Emblett (registered trademark)" sold by Unitika Ltd., "Skyroll (registered trademark)" sold by S.K.C. Corporation, "Kofil (registered trademark)" sold by Takago Co., Ltd., "Zuitz Polyester Film (registered trademark)" sold by Zuitz Co., Ltd., and "Taiko Polyester Film (registered trademark)" sold by Futamura Chemical Co., Ltd. Among polyethylene terephthalate resin films, biaxially oriented products are particularly preferred.

[0179] The thickness of the low moisture-permeable layer is preferably from 3 to 110 μm, more preferably from 5 to 80 μm, and particularly preferably from 10 to 55 μm.

[0180] The moisture permeability of the low moisture permeability layer is 20g / m 2 24 hours or less is preferable, 10 g / m 2 24 hours or less is preferable, 5 g / m 2 24 hours or less is particularly preferable.

[0181] <Application> The laminate of the present invention can be used as a polarizing element (polarizing plate), specifically, for example, as a linear polarizing plate or a circular polarizing plate. When the laminate of the present invention does not have an optically anisotropic layer such as the λ / 4 plate, the laminate can be used as a linear polarizing plate. On the other hand, when the laminate of the present invention has the above-mentioned λ / 4 plate, the laminate can be used as a circularly polarizing plate.

[0182] <Image display device> The image display device of the present invention has the above-described laminate of the present invention. The display element used in the image display device of the present invention is not particularly limited, and examples thereof include a liquid crystal cell, an organic electroluminescence (hereinafter abbreviated as "EL") display panel, and a plasma display panel. Among these, a liquid crystal cell or an organic EL display panel is preferred. That is, the image display device of the present invention is preferably a liquid crystal display device using a liquid crystal cell as a display element, or an organic EL display device using an organic EL display panel as a display element.

[0183] [Viewing angle control layer] The image display device of the present invention may have a viewing angle control layer. Here, the viewing angle control layer is a layer that controls the transmittance of an image display device when viewed from the front and from an oblique direction, and is used to prevent people from looking into the display device or to switch the viewing angle, and examples of such a layer include a light control film manufactured by 3M and a laminate that uses a polarizer layer that has an absorption axis in the thickness direction. For laminates that use a polarizer layer that has an absorption axis in the thickness direction, see, for example, paragraphs

[0006] to

[0043] of WO 2018 / 079854. An example of an organic EL display device, which is an example of the image display device of the present invention, is preferably an embodiment having, from the viewing side, the above-mentioned viewing angle control layer, the above-mentioned polarizer layer, the above-mentioned optional polarizer layer, and an organic EL display panel in this order.

[0184] [Liquid crystal display device] A liquid crystal display device, which is one example of the image display device of the present invention, is a liquid crystal display device having the above-described laminate of the present invention (however, not including a λ / 4 plate) and a liquid crystal cell. In the present invention, of the laminates provided on both sides of the liquid crystal cell, it is preferable to use the laminate of the present invention as the polarizing element on the front side, and it is more preferable to use the laminate of the present invention as the polarizing elements on the front side and the rear side. The liquid crystal cell constituting the liquid crystal display device will be described in detail below.

[0185] [Liquid crystal cell] The liquid crystal cell used in the liquid crystal display device is preferably in VA (Vertical Alignment) mode, OCB (Optically Compensated Bend) mode, IPS (In-Plane-Switching) mode, or TN (Twisted Nematic) mode, but is not limited to these. In TN mode liquid crystal cells, rod-shaped liquid crystal molecules (rod-shaped liquid crystal compounds) are aligned substantially horizontally when no voltage is applied, and are further aligned in a twisted orientation of 60 to 120 degrees. TN mode liquid crystal cells are most commonly used as color TFT liquid crystal displays, and are described in numerous literature. In a VA mode liquid crystal cell, rod-shaped liquid crystal molecules are aligned substantially vertically when no voltage is applied. VA mode liquid crystal cells include (1) narrowly defined VA mode liquid crystal cells in which rod-shaped liquid crystal molecules are aligned substantially vertically when no voltage is applied and substantially horizontally when voltage is applied (described in Japanese Patent Laid-Open No. 2-176625), (2) multi-domain VA mode (MVA mode (Multi-domain Vertical Alignment)) liquid crystal cells in which VA mode is modified to widen the viewing angle (described in SID97, Digest of Tech. Papers (Proceedings) 28 (1997) 845), (3) n-ASM (Axially Symmetric Aligned Microcell) mode liquid crystal cells in which rod-shaped liquid crystal molecules are aligned substantially vertically when no voltage is applied and substantially horizontally when voltage is applied (described in Proceedings of the Japan Liquid Crystal Symposium 58-59 (1998)), and (4) SURVIVAL mode liquid crystal cells (presented at LCD (Liquid Crystal Display) International 98). The liquid crystal display may be of any of a PVA (Patterned Vertical Alignment) type, an optical alignment type, and a PSA (Polymer-Sustained Alignment) type. Details of these modes are described in Japanese Patent Laid-Open No. 2006-215326 and Japanese Patent Laid-Open No. 2008-538819. In IPS mode liquid crystal cells, rod-shaped liquid crystal molecules are aligned substantially parallel to the substrates, and when an electric field parallel to the substrate surface is applied, the liquid crystal molecules respond in a planar manner. In IPS mode, black display is achieved when no electric field is applied, and the absorption axes of a pair of upper and lower polarizing plates are perpendicular to each other. Methods for reducing light leakage during black display in oblique directions and improving the viewing angle using optical compensation sheets are disclosed in JP-A-10-54982, JP-A-11-202323, JP-A-9-292522, JP-A-11-133408, JP-A-11-305217, JP-A-10-307291, and the like.

[0186] [Organic EL display device] An organic EL display device (hereinafter, in this paragraph, abbreviated as "organic EL display device of the present invention"), which is one example of the image display device of the present invention, preferably has, for example, from the viewer's side, the above-mentioned laminate of the present invention (including an adhesive layer and a λ / 4 plate) and an organic EL display panel. In this case, the laminate is arranged in the following order from the viewer's side: a substrate (viewer's side), an alignment film (optionally provided), a polarizer layer, a transparent resin layer, an adhesive layer, a λ / 4 plate, and a substrate (non-viewer's side). The substrate on the non-viewer's side of the laminate may also serve as the substrate of the organic EL display device. By having a substrate on the viewer's side, the organic EL display device of the present invention has excellent abrasion resistance and impact resistance. Furthermore, due to the above-mentioned properties, the organic EL display device of the present invention is preferably used, for example, in an in-vehicle display device. An organic EL display panel is a display panel configured using organic EL elements each having an organic light-emitting layer (organic electroluminescence layer) sandwiched between electrodes (a cathode and an anode). The configuration of the organic EL display panel is not particularly limited, and any known configuration may be used. [Example]

[0187] The present invention will be described in more detail below with reference to examples. The materials, amounts used, ratios, treatment contents, treatment procedures, etc. shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the examples shown below.

[0188] [Example 1] [Preparation of transparent support] <Preparation of cellulose acylate dope for core layer> The following composition was charged into a mixing tank and stirred to dissolve each component, thereby preparing a cellulose acetate solution to be used as a cellulose acylate dope for the core layer. ---------------------------------------------------------------------------------- Core layer: cellulose acylate dope ---------------------------------------------------------------------------------- 100 parts by mass of cellulose acetate with an acetyl substitution degree of 2.88 In the example of JP 2015-227955 A 12 parts by weight of the described polyester compound B 2 parts by mass of the following compound F Methylene chloride (first solvent) 430 parts by mass Methanol (second solvent) 64 parts by weight ----------------------------------------------------------------------------------

[0189] Compound F [ka]

[0190] <Preparation of outer layer cellulose acylate dope> To 90 parts by weight of the above-mentioned cellulose acylate dope for the core layer, 10 parts by weight of the following matting agent solution was added to prepare a cellulose acetate solution to be used as the cellulose acylate dope for the outer layer.

[0191] ---------------------------------------------------------------------------------- Matting agent solution ---------------------------------------------------------------------------------- Silica particles with an average particle size of 20 nm (AEROSIL R972, manufactured by Nippon Aerosil Co., Ltd.) 2 parts by mass Methylene chloride (first solvent) 76 parts by mass Methanol (second solvent) 11 parts by mass 1 part by mass of the above-mentioned cellulose acylate dope for the core layer ----------------------------------------------------------------------------------

[0192] <Preparation of Cellulose Acylate Film 1> The core layer cellulose acylate dope and the outer layer cellulose acylate dope were filtered through a filter paper with an average pore size of 34 μm and a sintered metal filter with an average pore size of 10 μm, and then the core layer cellulose acylate dope and the outer layer cellulose acylate dope on both sides were simultaneously cast onto a drum at 20°C from a casting nozzle (band casting machine). Next, the film was peeled off when the solvent content was about 20% by mass, and both ends in the width direction of the film were fixed with tenter clips, and the film was dried while being stretched in the transverse direction at a stretch ratio of 1.1. Thereafter, the film was further dried by transporting it between rolls of a heat treatment device to prepare an optical film (transparent support) having a thickness of 40 μm, which was designated as cellulose acylate film 1. The in-plane retardation of the obtained cellulose acylate film 1 was 0 nm.

[0193] [Formation of photo-alignment film PA1] The coating solution PA1 for forming a photo-alignment film, which will be described later, was continuously applied onto the cellulose acylate film 1 using a wire bar. The support on which the coating film was formed was dried with hot air at 140°C for 120 seconds, and then the coating film was irradiated with polarized ultraviolet light (10 mJ / cm 2 A photo-alignment film PA1 was formed by irradiating the substrate with a super-high pressure mercury lamp (using an ultra-high pressure mercury lamp), and a TAC (triacetyl cellulose) film with a photo-alignment film was obtained. The thickness of the photo-alignment film PA1 was 0.5 μm. ---------------------------------------------------------------------------------- Coating liquid PA1 for photo alignment film formation ---------------------------------------------------------------------------------- 100.00 parts by mass of the following polymer PA-1 8.25 parts by weight of the acid generator PAG-1 (listed below) 0.6 parts by weight of the following stabilizer DIPEA Xylene 1126.60 parts by mass Methyl isobutyl ketone 125.18 parts by mass ----------------------------------------------------------------------------------

[0194] Polymer PA-1 [ka]

[0195] Acid generator PAG-1 [ka]

[0196] Stabilizer DIPEA [ka]

[0197] [Fabrication of Polarizer Layer P1] A polarizer layer-forming composition P1 having the following composition was continuously applied onto the obtained photoalignment film PA1 using a wire bar to form a coating layer P1. Next, the coating layer P1 was heated at 140° C. for 15 seconds, and then cooled to room temperature (23° C.). Next, the sample was heated for 60 seconds at the heating temperature shown in Table 1 below, and then cooled again to room temperature. Then, an LED lamp (center wavelength 365 nm) was used to illuminate the specimen at an intensity of 200 mW / cm 2 A polarizer layer P1 was formed on the photo-alignment film PA1 by irradiating the film for 2 seconds under the irradiation conditions of: The film thickness of the polarizer layer P1 was 0.5 μm.

[0198] ---------------------------------------------------------------------------------- Composition of polarizer layer-forming composition P1 ---------------------------------------------------------------------------------- 0.59 parts by mass of the following first dichroic substance C-1 0.36 parts by mass of the following second dichroic substance M-1 0.24 parts by mass of the following third dichroic substance Y-1 5.55 parts by mass of the following liquid crystal compound L-1 Polymerization initiator IRGACUREOXE-02 (BASF) 0.21 parts by mass 0.055 parts by mass of the following surfactant F-1 Cyclopentanone 45.34 parts by mass Tetrahydrofuran 45.34 parts by mass Benzyl alcohol 2.33 parts by mass ----------------------------------------------------------------------------------

[0199] Dichroic substance C-1 (maximum absorption wavelength: 570 nm) [ka]

[0200] Dichroic substance M-1 (maximum absorption wavelength: 466 nm) [ka]

[0201] Dichroic substance Y-1 (maximum absorption wavelength: 417 nm) [ka]

[0202] Liquid crystal compound L-1 [ka]

[0203] Surfactant F-1 [ka]

[0204] [Formation of oxygen blocking layer B1] A coating solution B1 having the following composition was continuously applied onto the polarizer layer P1 using a wire bar. The coating was then dried for 5 minutes with hot air at 80°C to obtain a laminate A having a 1.0 μm-thick oxygen-blocking layer B1 made of polyvinyl alcohol (PVA), i.e., a laminate A having a cellulose acylate film 1 (transparent support), a photo-alignment film PA1, a polarizer layer P1, and an oxygen-blocking layer B1 adjacent to each other in this order. ---------------------------------------------------------------------------------- Composition of coating solution B1 for forming oxygen barrier layer ---------------------------------------------------------------------------------- 3.80 parts by mass of the following modified polyvinyl alcohol Initiator Irg2959 0.20 parts by mass ·Water 70 parts by mass Methanol 30 parts by weight ----------------------------------------------------------------------------------

[0205] Modified Polyvinyl Alcohol [ka]

[0206] [Preparation of adhesive N1] An acrylate polymer was prepared according to the following procedure. In a reaction vessel equipped with a condenser, a nitrogen inlet pipe, a thermometer, and a stirrer, 95 parts by mass of butyl acrylate and 5 parts by mass of acrylic acid were polymerized by solution polymerization to obtain an acrylate polymer (A1) having an average molecular weight of 2,000,000 and a molecular weight distribution (Mw / Mn) of 3.0.

[0207] Next, using the obtained acrylate polymer (A1), an acrylate adhesive was prepared with the following composition. These compositions were applied to a separate film surface-treated with a silicone-based release agent using a die coater and dried in an environment at 90°C for 1 minute, and irradiated with ultraviolet rays (UV) under the following conditions to obtain an acrylate adhesive N1 with a film thickness of 15 μm. The composition of the acrylate adhesive N1 is shown below. The prepared acrylate adhesive N1 showed a moisture content of 0.60% after being left in an environment at a temperature of 25°C and a relative humidity of 60% for 3 days. Also, the content of the reducing agent in the prepared acrylate adhesive N1 was 0.01 g / m 2 less than. <UV Irradiation Conditions> · Fusion Electrodeless Lamp H Bulb · Illuminance 600 mW / cm 2 and light quantity 150 mJ / cm 2 · The UV illuminance and light quantity were measured using "UVPF-36" manufactured by Eye Graphics.

[0208] ――――――――――――――――――――――――――――――――― Acrylate Adhesive N1 ――――――――――――――――――――――――――――――――― · Acrylate Polymer (A1) 100 parts by mass · The following (A) polyfunctional acrylate monomer 11.1 parts by mass · The following (B) photoinitiator 1.1 parts by mass · The following (C) isocyanate-based crosslinking agent 1.0 parts by mass · The following (D) silane coupling agent 0.2 parts by mass ―――――――――――――――――――――――――――――――――

[0209] (A) Polyfunctional Acrylate Monomer: Tris(acryloyloxyethyl) isocyanurate, molecular weight = 423, trifunctional type (manufactured by Toagosei Co., Ltd., trade name "Allonix M-315") (B) Photopolymerization initiator: a 1:1 mixture of benzophenone and 1-hydroxycyclohexylphenyl ketone by mass, "Irgacure 500" manufactured by Ciba Specialty Chemicals (C) Isocyanate-based crosslinking agent: Trimethylolpropane-modified tolylene diisocyanate ("Coronate L" manufactured by Nippon Polyurethane Co., Ltd.) (D) Silane coupling agent: 3-glycidoxypropyltrimethoxysilane ("KBM-403" manufactured by Shin-Etsu Chemical Co., Ltd.)

[0210] [Preparation of adhesive N2] An acrylate adhesive with the following composition was applied using a die coater to a separate film that had been surface-treated with a silicone-based release agent, and then dried for 10 minutes in an environment of 90°C to obtain acrylate adhesive N2 with a film thickness of 200 μm. The composition of the acrylate adhesive is shown below. Note that p-methoxyphenol was added to improve the long-term storage stability of the adhesive, but it can also act as a reducing agent for azo dyes. The prepared acrylate adhesive N2 contained 0.05 g / m 2 It contained p-methoxyphenol. The prepared acrylate-based pressure-sensitive adhesive N2 showed a water content of 0.25% after being left for 3 days in an environment of a temperature of 25°C and a relative humidity of 60%.

[0211] ---------------------------------------------------------------------------------- Acrylate adhesive N2 ---------------------------------------------------------------------------------- SK Dyne 2147 (manufactured by Soken Chemical & Engineering Co., Ltd.) 100 parts by mass p-Methoxyphenol 0.33 parts by mass ----------------------------------------------------------------------------------

[0212] [Preparation of evaluation laminate A-1] The oxygen-blocking layer B1 side of the laminate A, cut into a 10 cm square, was bonded to a 10 cm square piece of alkali-free Glass Eagle XG (1.1 mm thick, manufactured by Corning Incorporated) using the adhesive N1 cut into a 10 cm square. Next, only the cellulose acylate film 1 contained in the laminate A was removed, and the removed surface was bonded to a 10 cm square piece of alkali-free Glass Eagle XG (1.1 mm thick) cut into a 10 cm square using the adhesive N2 to produce laminate A-1. The layer structure of laminate A-1 was alkali-free Glass Eagle XG, adhesive layer N1, oxygen-blocking layer B1, polarizer layer P1, photo-alignment film PA1, adhesive layer N2, and alkali-free Glass Eagle XG. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 0.67 g / m 2 The total content of the reducing agent in the pressure-sensitive adhesive layer of the produced laminate was 0.05 g / m 2 More than 0.06g / m 2 It was less than. On the other hand, the moisture permeability of the alkali-free glass used in the production was 1.0 × 10 -3 g / m 2 It was less than a day.

[0213] [Example 2] A laminate A-2 was produced in the same manner as in Example 1, except that the acrylate-based adhesive N2 was changed to a commercially available sheet-type adhesive SA368 (manufactured by Shin-Tack Chemical Co., Ltd.). After being left for 3 days in an environment of 25°C and 60% relative humidity, the sheet-type adhesive SA368 showed a moisture content of 0.19%. The reducing agent content of the sheet-type adhesive SA368 was 0.01 g / m 2 It was less than. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 0.55 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 It was less than.

[0214] [Example 3] [Preparation of adhesive N3] Acrylate-based pressure-sensitive adhesive N3 was obtained in the same manner as acrylate-based pressure-sensitive adhesive N2, except that the film thickness was changed to 50 μm. The acrylate-based adhesive N3 showed a water content of 0.25% after being left for 3 days in an environment of a temperature of 25°C and a relative humidity of 60%. 2 It contained p-methoxyphenol.

[0215] A laminate A-3 was produced in the same manner as in Example 1, except that the acrylate-based pressure-sensitive adhesive N2 was changed to the acrylate-based pressure-sensitive adhesive N3. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 0.30 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 More than 0.02g / m 2 It was less than.

[0216] [Example 4] [Preparation of adhesive N4] A commercially available acrylate adhesive solution, SK Dyne 2147(), was applied using a die coater to a separate film that had been surface-treated with a silicone-based release agent, and dried for 10 minutes in an environment at 90°C to obtain acrylate adhesive N4 with a film thickness of 200 μm. The prepared acrylate-based pressure-sensitive adhesive N4 showed a water content of 0.25% after being left for 3 days in an environment of a temperature of 25°C and a relative humidity of 60%. The reducing agent content of the prepared acrylate-based pressure-sensitive adhesive N4 was 0.01 g / m 2 It was less than.

[0217] A laminate A-4 was produced in the same manner as in Example 1, except that the acrylate-based pressure-sensitive adhesive N2 was changed to the acrylate-based pressure-sensitive adhesive N4. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 0.67 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 It was less than.

[0218] [Example 5] Laminate A-5 was produced in the same manner as in Example 1, except that the acrylate-based adhesive N2 was replaced with a commercially available sheet-type adhesive CS9898 (manufactured by Nitto Denko Corporation). The sheet-type adhesive CS9898 was left in a low-humidity environment (25°C, 10% relative humidity) for 24 hours to dehydrate it before lamination. The reducing agent content of the sheet-type adhesive CS9898 was 0.01 g / m 2 It was less than. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 0.77 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 It was less than.

[0219] [Example 6] The oxygen-blocking layer B1 side of the laminate A was bonded to 1.1 mm thick alkali-free Glass Eagle XG (manufactured by Corning Incorporated) using the pressure-sensitive adhesive N1. Next, only the cellulose acylate film 1 contained in the laminate A was removed, and a commercially available cycloolefin polymer film (ZEONOR ZB12, film thickness 50 μm, manufactured by Zeon Corporation) was bonded to the removed surface. Furthermore, the cycloolefin polymer film side of the laminate and 1.1 mm thick alkali-free Glass Eagle XG were bonded using commercially available sheet-like pressure-sensitive adhesive CS9898 (manufactured by Nitto Denko Corporation) to produce laminate A-6. The layer structure of laminate A-6 was alkali-free Glass Eagle XG, pressure-sensitive adhesive layer N1, oxygen-blocking layer B1, polarizer layer P1, photoalignment film PA1, pressure-sensitive adhesive layer N1, cycloolefin polymer film ZB12, sheet-like pressure-sensitive adhesive CS9898, and alkali-free Glass Eagle XG. The sheet-shaped pressure-sensitive adhesive CS9898 showed a moisture content of 0.69% after being left for 3 days in an environment at a temperature of 25°C and a relative humidity of 60%. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 1.64 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 It was less than. The moisture permeability of cycloolefin polymer film ZB12 is 1.8 g / m 2 ·day.

[0220] [Example 7] [Formation of photo-alignment film PA2] A coating solution PA2 for forming a photo-alignment layer was prepared with the following composition, dissolved for 1 hour with stirring, and filtered through a 0.45 μm filter. The prepared coating solution PA2 for forming a photo-alignment layer was continuously applied to the cellulose acylate film 1 using a wire bar. The support on which the coating film was formed was dried with hot air at 60° C. for 120 seconds, and then the coating film was irradiated with polarized ultraviolet light (100 mJ / cm ). 2 By using an ultra-high pressure mercury lamp), a photo-alignment film PA2 was formed, and a TAC (triacetyl cellulose) film with a photo-alignment film was obtained.

[0221] ---------------------------------------------------------------------------------- Coating liquid PA2 for photo alignment film formation ---------------------------------------------------------------------------------- 5.0 parts by mass of the following photoactive compound E-4 Cyclopentanone 95.0 parts by mass ----------------------------------------------------------------------------------

[0222] Photoactive compound E-4 (weight average molecular weight; 51000) [ka]

[0223] [Fabrication of Polarizer Layer P2] A polarizer layer-forming composition P2 was prepared with the following formulation, heated and dissolved at 80°C for 2 hours while stirring, and filtered through a 0.45 μm filter. The prepared polarizer layer-forming composition P2 was applied to the photoalignment film PA2 using a wire bar. The resulting coating was then heated at 120°C for 60 seconds and cooled to room temperature. Thereafter, a high-pressure mercury lamp was used to apply an exposure dose of 2000 mJ / cm. 2 A polarizer layer P2 having a thickness of 1.7 μm was formed by irradiating the polarizer layer with ultraviolet light of 1.7 μm. It was confirmed that the liquid crystal in the polarizer layer was in a smectic B phase.

[0224] ---------------------------------------------------------------------------------- Polarizer layer forming composition P2 ---------------------------------------------------------------------------------- 0.8 parts by mass of the following dichroic dye D1 ·2.6 parts by mass of the following dichroic dye D2 2.2 parts by mass of the following dichroic dye D3 1.8 parts by mass of the following dichroic dye D4 100.0 parts by mass of the following liquid crystal compound M1 Polymerization initiator IRGACURE369 (BASF) 5.0 parts by mass BYK361N (manufactured by BYK Japan) 0.9 parts by mass Cyclopentanone 925.0 parts by mass ----------------------------------------------------------------------------------

[0225] Dichroic dye D1 [ka]

[0226] Dichroic dye D2 [ka]

[0227] Dichroic dye D3 [ka]

[0228] Dichroic dye D4 [ka]

[0229] Liquid crystal compound M1 (compound A / compound B mixed at 75 / 25)

[0230] (Compound A) [ka]

[0231] (Compound B) [ka]

[0232] [Formation of oxygen blocking layer B1] The coating solution B1 was continuously applied onto the polarizer layer P2 using a wire bar, and then dried with hot air at 80°C for 5 minutes to obtain a laminate AA having a 1.0 μm-thick oxygen-blocking layer B1 made of polyvinyl alcohol (PVA), i.e., a laminate AA having a cellulose acylate film 1 (transparent support), a photo-alignment film PA2, a polarizer layer P2, and an oxygen-blocking layer B1 adjacent to each other in this order. A laminate A-7 was produced in the same manner as in Example 2, except that the laminate A was changed to the laminate AA. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 0.55 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 It was less than.

[0233] [Comparative Example 1] A laminate B-1 was produced in the same manner as in Example 1, except that the acrylate-based adhesive N2 was changed to a commercially available sheet-type adhesive CS9898 (manufactured by Nitto Denko Corporation). The sheet-shaped pressure-sensitive adhesive CS9898 showed a moisture content of 0.69% after being left for 3 days in an environment at a temperature of 25°C and a relative humidity of 60%. The amount of moisture present between the two non-alkali glass sheets of the laminate was measured and found to be 1.55 g / m 2 It was. The total content of the reducing agent in the pressure-sensitive adhesive layer of the laminate was 0.01 g / m 2 It was less than.

[0234] [Evaluation: Discoloration resistance test] The laminates obtained in the examples and comparative examples were subjected to a test in which they were left in an environment of 105°C for 500 hours (a test simulating in-vehicle use), and the discoloration in the center of the sample after the test was evaluated. A spectrophotometer was used for the evaluation, and the color difference (difference in b) between the center and periphery of the sample placed on white paper (the average of four points at the four corners and 1 cm inside each side of the sample) was evaluated using the following index. A rating of "C" or higher can be considered to indicate acceptable durability. A: Color difference Δb between the center and periphery is less than 1.0 B: Color difference Δb between the center and periphery is 1.0 or more and less than 1.5 C: Color difference Δb between the center and periphery is 1.5 or more and less than 2.5 D: Color difference Δb between the center and periphery is 2.5 or more

[0235] The results of the above evaluation tests are shown in Table 1 below.

[0236] [Table 1]

[0237] As shown in Table 1, it was confirmed that the laminates produced in Examples 1 to 7 all had excellent resistance to discoloration.

[0238] [Fabrication of organic EL display devices] [Preparation of TAC film A1 with positive A plate A1] The coating solution PA3 for forming a photo-alignment film having the following composition was continuously coated on the above-mentioned cellulose acylate film 1 using a wire bar. The support on which the coating film was formed was dried with hot air at 140°C for 120 seconds, and then the coating film was irradiated with polarized ultraviolet light (10 mJ / cm 2 By using an ultra-high pressure mercury lamp), a photo-alignment film PA3 having a thickness of 0.2 μm was formed, and a TAC film with a photo-alignment film was obtained.

[0239] ---------------------------------------------------------------------------------- Coating liquid PA3 for photo alignment film formation ---------------------------------------------------------------------------------- 100.00 parts by mass of the following polymer PA-2 5.00 parts by weight of the acid generator PAG-1 0.005 parts by weight of the acid generator CPI-110TF Isopropyl alcohol 16.50 parts by weight Butyl acetate 1072.00 parts by mass Methyl ethyl ketone 268.00 parts by mass ----------------------------------------------------------------------------------

[0240] Polymer PA-2 [ka]

[0241] Composition A-1 having the following composition was applied onto the photo-alignment film PA3 using a bar coater. The coating film formed on the photo-alignment film PA3 was heated to 120°C with hot air, then cooled to 60°C, and then irradiated with 100 mJ / cm2 at a wavelength of 365 nm using a high-pressure mercury lamp under a nitrogen atmosphere. 2 The coating was irradiated with ultraviolet light of 500 mJ / cm 2 and then heated to 120°C. 2The coating film was irradiated with ultraviolet light of 1000 kJ / s to fix the alignment of the liquid crystal compound, thereby preparing a TAC film A1 having a positive A plate A1. The positive A plate A1 had a thickness of 2.5 μm and an Re(550) of 144 nm. The positive A plate A1 also satisfied the relationship Re(450)≦Re(550)≦Re(650). The Re(450) / Re(550) ratio was 0.82.

[0242] ---------------------------------------------------------------------------------- Composition A-1 ---------------------------------------------------------------------------------- 43.50 parts by mass of the following polymerizable liquid crystal compound LA-1 43.50 parts by mass of the following polymerizable liquid crystal compound LA-2 8.00 parts by mass of the following polymerizable liquid crystal compound LA-3 5.00 parts by mass of the following polymerizable liquid crystal compound LA-4 0.55 parts by mass of the following polymerization initiator PI-1 0.20 parts by weight of the following leveling agent T-1 Cyclopentanone 235.00 parts by mass ----------------------------------------------------------------------------------

[0243] Polymerizable liquid crystal compound LA-1 (tBu represents a tertiary butyl group) [ka]

[0244] Polymerizable liquid crystal compound LA-2 [ka]

[0245] Polymerizable liquid crystal compound LA-3 [ka]

[0246] Polymerizable liquid crystal compound LA-4 (Me represents a methyl group) [ka]

[0247] Polymerization initiator PI-1 [ka]

[0248] Leveling Agent T-1 [ka]

[0249] [Preparation of TAC film C1 with positive C-plate C1] The above-mentioned cellulose acylate film 1 was used as the temporary support. The cellulose acylate film 1 was passed through a dielectric heating roll at a temperature of 60°C to raise the film surface temperature to 40°C, and then an alkaline solution having the composition shown below was applied to one side of the film using a bar coater in an amount of 14 ml / m 2 The mixture was heated to 110°C and transported under a steam-type far-infrared heater manufactured by Noritake Co., Ltd. for 10 seconds. Next, using the same bar coater, 3 ml / m of pure water was applied to the film. 2 It was applied. Next, after repeating washing with a fountain coater and draining with an air knife three times, the film was transported to a drying zone at 70° C. for 10 seconds and dried to prepare an alkaline saponified cellulose acylate film 1.

[0250] ---------------------------------------------------------------------------------- (alkaline solution) ---------------------------------------------------------------------------------- Potassium hydroxide 4.7 parts by mass ·Water 15.8 parts by mass Isopropanol 63.7 parts by mass Fluorine-containing surfactant SF-1 (C 14 H 29 O(CH2CH2O) 20 H) 1.0 parts by mass Propylene glycol 14.8 parts by mass ----------------------------------------------------------------------------------

[0251] An alignment film-forming coating solution PA4 having the following composition was continuously applied using a #8 wire bar onto the above-mentioned alkali-saponified cellulose acylate film 1. The obtained film was dried with hot air at 60°C for 60 seconds and then with hot air at 100°C for 120 seconds to form an alignment film PA4.

[0252] ---------------------------------------------------------------------------------- Alignment film forming coating solution PA4 ---------------------------------------------------------------------------------- Polyvinyl alcohol (Kuraray, PVA103) 2.4 parts by weight Isopropyl alcohol 1.6 parts by weight Methanol 36 parts by weight ·Water 60 parts by mass ----------------------------------------------------------------------------------

[0253] A coating solution C1 for forming a positive C plate having the following composition was applied onto the alignment film PA4, and the resulting coating film was aged at 60°C for 60 seconds, and then irradiated with 70 mW / cm 2 in air. 2 An air-cooled metal halide lamp (manufactured by Eye Graphics Co., Ltd.) was used, and the output was 1000 mJ / cm 2 The alignment state was fixed by irradiating the liquid crystal compound with ultraviolet light of 1000 nm to vertically align the liquid crystal compound, thereby producing a TAC film C1 having a positive C plate C1 with a thickness of 0.5 μm. The Rth(550) of the obtained positive C plate was −60 nm.

[0254] ---------------------------------------------------------------------------------- Positive C-plate coating solution C1 ---------------------------------------------------------------------------------- 80 parts by mass of the following liquid crystal compound LC-1 20 parts by mass of the following liquid crystal compound LC-2 1 part by weight of the following vertical alignment liquid crystal compound promoter S01 Ethylene oxide modified trimethylolpropane triacrylate (V#360, manufactured by Osaka Organic Chemical Co., Ltd.) 8 parts by mass Irgacure 907 (BASF) 3 parts by weight Kayacure DETX (manufactured by Nippon Kayaku Co., Ltd.) 1 part by weight 0.4 parts by mass of the following compound B03 Methyl ethyl ketone 170 parts by mass Cyclohexanone 30 parts by mass ----------------------------------------------------------------------------------

[0255] Liquid crystal compound LC-1 [ka]

[0256] Liquid crystal compound LC-2 [ka]

[0257] Vertical alignment liquid crystal compound promoter S01 [ka]

[0258] Compound B03 [ka]

[0259] [Preparation of evaluation laminate C-1] The retardation side of the TAC film A1 having the positive A plate A1 and the retardation side of the TAC film C1 having the positive C plate C1 were bonded to each other with the UV adhesive composition at 600 mJ / cm 2 The plates were laminated together by UV irradiation. The thickness of the UV adhesive layer was 3 μm. The surfaces to be laminated with the UV adhesive were each subjected to corona treatment. Next, the photo-alignment film PA3 and cellulose acylate film 1 on the positive A plate A1 side were removed to obtain a retardation plate 1. The layer configuration of the retardation plate 1 was the positive A plate A1, UV adhesive layer, positive C plate C1, photo-alignment film PA4, and cellulose acylate film 1. The oxygen-blocking layer B1 side of the laminate A was bonded to alkali-free Glass Eagle XG (1.1 mm thick, manufactured by Corning Incorporated) using the adhesive N1. Next, only the cellulose acylate film 1 contained in the laminate A was removed, and the removed surface was bonded to the positive A plate A1 side of the retardation film 1 using the adhesive N1. Next, the photo-alignment film PA4 and the cellulose acylate film 1 on the positive C plate C1 side contained in the retardation film 1 were removed to prepare laminate C-1. At this time, the laminate was bonded so that the angle between the absorption axis of the polarizer layer P1 contained in the laminate A and the slow axis of the positive A plate A1 was 45°. The layer configuration of the laminate C-1 was alkali-free Glass Eagle XG, adhesive layer N1, oxygen-blocking layer B1, polarizer layer P1, photo-alignment film PA1, adhesive layer N1, positive A plate A1, UV adhesive layer, and positive C plate C1.

[0260] A Samsung GALAXY S5 equipped with an organic EL panel (organic EL display element) was disassembled, the touch panel with a circular polarizer was peeled off from the organic EL display device, and the circular polarizer was then peeled off from the touch panel to separate the organic EL display element including the glass substrate, the touch panel, and the circular polarizer. The separated touch panel was then reattached to the organic EL display element, and the positive C-plate C1 side of the laminate C-1 prepared above was attached to the touch panel using the adhesive N2 to prevent air from entering, thereby producing an organic EL display device.

[0261] The display performance of the fabricated organic EL display device was evaluated under bright light. Specifically, the display screen of the display device was set to black, and the reflected light was observed when a fluorescent lamp was projected from the front and from a polar angle of 45 degrees. No coloring was visible, demonstrating excellent display performance.

Claims

1. A laminate having two substrates, a polarizer layer disposed between the two substrates, and one or two pressure-sensitive adhesive layers disposed between the two substrates and the substrates and the polarizer layer, the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, The moisture permeability of the two substrates is 10 －３ g / m ２ ・day or less, The thickness of the pressure-sensitive adhesive layer is 50 μm or more and 70 μm or less, A laminate, wherein the moisture content of the pressure-sensitive adhesive layer is 0.60% or less. Here, when the laminate has two pressure-sensitive adhesive layers, the thickness of the pressure-sensitive adhesive layer refers to the total thickness of the two pressure-sensitive adhesive layers.

2. The content of the reducing agent in the pressure-sensitive adhesive layer is 0.04 g / m ２ 2. The laminate of claim 1, wherein: Here, when the laminate has two pressure-sensitive adhesive layers, the content of the reducing agent in the pressure-sensitive adhesive layer refers to the total content of the reducing agent in the two pressure-sensitive adhesive layers.

3. A laminate comprising two substrates, a polarizer layer disposed between the two substrates, one low-moisture-permeable layer disposed between the two substrates, and one to three pressure-sensitive adhesive layers disposed between the two substrates, between the substrate and the polarizer layer, between the substrate and the low-moisture-permeable layer, or between the polarizer layer and the low-moisture-permeable layer, the polarizer layer contains one or more azo dyes having two or more azo bonds in the molecule, The moisture permeability of the two substrates is 10 －３ g / m ２ ・day or less, The moisture permeability of the low moisture permeable layer is 20 g / m ２ ・day or less, A laminate, wherein the thickness of at least one of the pressure-sensitive adhesive layers is 100 μm or more and 300 μm or less.

4. The laminate according to claim 3 , wherein the low-moisture-permeable layer comprises a cyclic polyolefin resin.

5. The content of the reducing agent in the pressure-sensitive adhesive layer is 0.04 g / m ２ 5. The laminate according to claim 3 or 4, wherein: Here, when the laminate has a plurality of pressure-sensitive adhesive layers, the content of the reducing agent in the pressure-sensitive adhesive layer refers to the total content of the reducing agent in the plurality of pressure-sensitive adhesive layers.

6. The laminate according to any one of claims 1 to 5, wherein the two substrates are both glass substrates.

7. The laminate according to any one of claims 1 to 6, wherein the thickness of each of the two substrates is 100 to 1100 µm.

8. The laminate according to any one of claims 1 to 7, wherein the azo dye is a compound represented by the following formula (1): 【Chemistry 1】 In the formula (1), Ar1 and Ar2 each independently represent a phenylene group which may have a substituent, or a naphthylene group which may have a substituent. In the formula (1), R1 represents a hydrogen atom, or an alkyl group, an alkoxy group, an alkylthio group, an alkylsulfonyl group, an alkylcarbonyl group, an alkyloxycarbonyl group, an acyloxy group, an alkylcarbonate group, an alkylamino group, an acylamino group, an alkylcarbonylamino group, an alkoxycarbonylamino group, an alkylsulfonylamino group, an alkylsulfamoyl group, an alkylcarbamoyl group, an alkylsulfinyl group, an alkylureido group, an alkylphosphoric acid amide group, an alkylimino group, or an alkylsilyl group, each of which may have a substituent. In the formula (1), R2 and R3 each independently represent a hydrogen atom, or an alkyl group, alkenyl group, alkoxy group, acyl group, alkyloxycarbonyl group, alkylamide group, alkylsulfonyl group, aryl group, arylcarbonyl group, arylsulfonyl group, aryloxycarbonyl group, or arylamide group, each of which may have a substituent. R2 and R3 may be bonded to each other to form a ring, or R2 or R3 may be bonded to Ar2 to form a ring.

9. An image display device comprising the laminate according to any one of claims 1 to 8.

Images