WO2019221123A1

WO2019221123A1 - Method for manufacturing optical laminate and method for manufacturing display device

Info

Publication number: WO2019221123A1
Application number: PCT/JP2019/019136
Authority: WO
Inventors: 直弥西村; 史岳三戸部; 武田　淳
Original assignee: 富士フイルム株式会社
Priority date: 2018-05-14
Filing date: 2019-05-14
Publication date: 2019-11-21
Also published as: JPWO2019221123A1; JP7016412B2

Abstract

The present invention provides a method for manufacturing an optical laminate, whereby an optical laminate containing a surface film, a light absorption anisotropic layer, and an optically anisotropic layer can be easily manufactured, and a method for manufacturing a display device. This method for manufacturing an optical laminate comprises: a step for laminating a first optical laminate, which comprises a first peelable support, a first alignment film, and a light absorption anisotropic layer in said order, and a second optical laminate, which comprises a second peelable support, a second alignment film, and an optically anisotropic layer in said order, such that the surface on the light absorption anisotropic layer side of the first optical laminate faces the surface on the optically anisotropic layer A side of the second optical laminate, and peeling off the first peelable support to obtain a laminate X; and a step for laminating a surface film on the surface on the first alignment film side of the laminate X, and peeling off the second peelable support to obtain an optical laminate comprising the surface film, light absorption anisotropic layer, and optically anisotropic layer A.

Description

Manufacturing method of optical laminate and manufacturing method of display device

The present invention relates to a method for manufacturing an optical laminate and a method for manufacturing a display device.

In recent years, various studies have been conducted on a light absorption anisotropic layer formed using a dichroic material.
For example, in Patent Document 1, a sheet including a polarizing film formed using a dichroic material that is a light absorption anisotropic layer and a sheet including a retardation film that is an optical anisotropic layer are used. An embodiment for producing a circularly polarizing plate is disclosed.

JP 2016-27431 A

On the other hand, in an optical laminated body including a light absorption anisotropic layer and an optical anisotropic layer, a surface film is often separately disposed on the surface according to various usage environments.
Therefore, a method capable of easily producing an optical laminate including a surface film, a light absorption anisotropic layer and an optical anisotropic layer has been desired.

In view of the above circumstances, an object of the present invention is to provide a method for producing an optical laminate, which can easily produce an optical laminate including a surface film, a light absorption anisotropic layer, and an optical anisotropic layer. .
Another object of the present invention is to provide a method for manufacturing a display device.

As a result of intensive studies on the problems of the prior art, the present inventor has found that the above object can be achieved by the following configuration.

(1) The surface on the light absorption anisotropic layer side of the first optical laminate having the first peelable support, the first alignment film, and the light absorption anisotropic layer in this order, and the second peel support. The first optical laminate and the second optical laminate so that the surface on the optical anisotropic layer A side of the second optical laminate having the body, the second alignment film, and the optical anisotropic layer A in this order are opposed to each other. A step of laminating an optical layered body, peeling off the first peelable support to obtain a layered product X,
An optical film having a surface film, a light-absorbing anisotropic layer, and an optically anisotropic layer A by laminating a surface film on the surface of the laminate X on the first alignment film side and peeling the second peelable support. Obtaining a laminate, and
The light absorption anisotropic layer is formed using a liquid crystalline composition containing a dichroic substance and a liquid crystalline compound,
The manufacturing method of an optical laminated body whose peeling force of a 1st peelable support body is smaller than the peeling force of a 2nd peelable support body.
(2) The surface on the optically anisotropic layer A side of the second optical laminate having the second peelable support, the second alignment film, and the optically anisotropic layer A in this order, and the third peelable support The second optical laminated body and the third optical laminated body are laminated so that the surface of the third optical laminated body having the optically anisotropic layer B in this order faces the surface on the optical anisotropic layer B side. And peeling the second peelable support to obtain the laminate Y,
The light absorption anisotropic layer of the first optical laminate having the surface of the laminate Y on the second alignment film side, the first peelable support, the first alignment film, and the light absorption anisotropic layer in this order. Laminating the laminate Y and the first optical laminate so that the surface on the side faces, and peeling the first peelable support to obtain the laminate Z;
A surface film is laminated on the surface of the laminated body Z on the first alignment film side, the third peelable support is peeled off, and the surface film, the light absorption anisotropic layer, the optical anisotropic layer A, and the optical anisotropy are separated. Obtaining an optical laminate having layer B, and
The light absorption anisotropic layer is formed using a composition containing a dichroic substance and a liquid crystal compound,
Optical lamination in which the peel strength of the first peelable support is smaller than the peel strength of the third peelable support, and the peel strength of the second peelable support is smaller than the peel strength of the third peelable support Body manufacturing method.
(3) The manufacturing method of the optical laminated body as described in (1) or (2) in which a dichroic substance contains the compound represented by Formula (1) mentioned later.
(4) The method for producing an optical laminated body according to any one of (1) to (3), wherein the dichroic substance contains a compound represented by the formula (2) described later.
(5) The method for producing an optical laminated body according to any one of (1) to (4), wherein the dichroic substance contains a compound represented by the formula (3) described later.
(6) The liquid crystal compound includes a polymer liquid crystal compound containing a repeating unit represented by the formula (4) described later. In the formula (4), the log P value of P1, L1, and SP1, and the log P value of M1 The method for producing an optical laminated body according to any one of (1) to (5), wherein the difference is 4 or more.
(7) The method for producing an optical laminate according to any one of (1) to (6), wherein the average refractive index of the first alignment film at a wavelength of 550 nm is 1.55 to 1.80.
(8) The method for producing an optical laminated body according to any one of (1) to (7), wherein the optically anisotropic layer A is a λ / 4 plate.
(9) The method for producing an optical laminated body according to any one of (1) to (8), wherein the surface film has a base material and a hard coat layer.
(10) The method for producing an optical laminate according to (9), wherein the base material contains at least one selected from the group consisting of an acrylic resin, a methacrylic resin, a cyclic polyolefin resin, and a polyester resin.
(11) The optical laminate is manufactured so that the display element faces the surface opposite to the surface film side of the optical laminate produced by the production method according to any one of (1) to (10). A method for manufacturing a display device, comprising a step of manufacturing a display device by stacking a display element.
(12) The method for manufacturing a display device according to (11), wherein an adhesion layer is disposed between the optical laminate and the display element.

ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of an optical laminated body which can manufacture easily the optical laminated body containing a surface film, a light absorption anisotropic layer, and an optical anisotropic layer can be provided.
Further, according to the present invention, a method for manufacturing a display device can be provided.

It is a figure for demonstrating the process of 1st Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of the laminated body X obtained by 1st Embodiment of the manufacturing method of an optical laminated body. It is a figure for demonstrating the process of 1st Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of the optical laminated body obtained by 1st Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of 1st Embodiment of a display apparatus. It is a figure for demonstrating the process of 2nd Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of the laminated body Y obtained by 2nd Embodiment of the manufacturing method of an optical laminated body. It is a figure for demonstrating the process of 2nd Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of the laminated body Z obtained by 2nd Embodiment of the manufacturing method of an optical laminated body. It is a figure for demonstrating the process of 2nd Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of the optical laminated body obtained by 2nd Embodiment of the manufacturing method of an optical laminated body. It is sectional drawing of 2nd Embodiment of a display apparatus.

Hereinafter, the present invention will be described in detail. In the present specification, a numerical range represented by using “to” means a range including numerical values described before and after “to” as a lower limit value and an upper limit value. First, terms used in this specification will be described.

In the present invention, Re (λ) and Rth (λ) represent in-plane retardation and retardation in the thickness direction at wavelength λ, respectively. Unless otherwise specified, the wavelength λ is 550 nm.
In the present invention, Re (λ) and Rth (λ) are values measured at a wavelength λ in AxoScan OPMF-1 (manufactured by Optoscience). By inputting the average refractive index _{_{_{((n x + n y +}}} n z) / 3) and the thickness (d (μm)) at AxoScan,
Slow axis direction (°)
Re (λ) = R0 (λ)
Rth (λ) = ((n _x + n _y ) / 2−n _z ) × d
Is calculated.
Note that R0 (λ) is displayed as a numerical value calculated by AxoScan OPMF-1, and means Re (λ).

The average refractive index used in AxoScan is measured using an Abbe refractometer (NAR-4T, manufactured by Atago Co., Ltd.) and a sodium lamp (λ = 589 nm) as a light source. Further, when measuring the wavelength dependence, it can be measured in combination with an interference filter using a multi-wavelength Abbe refractometer DR-M2 (manufactured by Atago Co., Ltd.).
Moreover, the values in the polymer handbook (John Wiley & Sons, Inc.) and catalogs of various optical films can be used. The average refractive index values of the main optical films are exemplified below: cellulose acylate (1.48), cycloolefin polymer (1.52), polycarbonate (1.59), polymethyl methacrylate (1.49), Polystyrene (1.59).

In this specification, an angle (for example, an angle such as “90 °”) and a relationship thereof (for example, “orthogonal”, “parallel”, and “intersect at 45 °”) are used in the technical field to which the present invention belongs. It shall include the allowable error range. For example, it means that the angle is within the range of strict angle ± 10 °, and the error from the strict angle is preferably 5 ° or less, and more preferably 3 ° or less.

In the present specification, the “absorption axis” of the light absorption anisotropic layer means the direction of highest absorbance. The “transmission axis” means a direction that forms an angle of 90 ° with the “absorption axis”.

In the present specification, the (meth) acrylic resin is a concept including both a methacrylic resin and an acrylic resin, and includes acrylate / methacrylate derivatives, in particular, acrylate ester / methacrylate ester (co) polymers.
The (meth) acryloyl group is a concept including both an acryloyl group and a methacryloyl group.

<< First Embodiment >>
Hereinafter, a first embodiment of a method for producing an optical layered body of the present invention will be described with reference to the drawings.
1st Embodiment of the manufacturing method of the optical laminated body of this invention has the process 1-1 and the process 1-2 mentioned later.
Hereinafter, each process is explained in full detail.

<Step 1-1>
Step 1-1 includes a surface on the light absorption anisotropic layer side of the first optical laminate having the first peelable support, the first alignment film, and the light absorption anisotropic layer in this order, The first optical laminate so that the surface on the optical anisotropic layer A side of the second optical laminate having the peelable support, the second alignment film, and the optical anisotropic layer A in this order faces each other. And a second optical laminate, and a first peelable support is peeled off to obtain a laminate X.
More specifically, in this step, as shown in FIG. 1, a first optical laminate having a first peelable support 12, a first alignment film 14, and a light absorption anisotropic layer 16 in this order. A second optical laminate 20 having the body 10, the second peelable support 26, the second alignment film 24, and the optically anisotropic layer A22 in this order is prepared. Next, as shown in FIG. 2, the surface of the first optical laminate 10 on the light absorption anisotropic layer 16 side and the surface of the second optical laminate 20 on the optical anisotropic layer A22 side are opposed to each other. First, the first optical laminated body 10 and the second optical laminated body 20 are laminated, and the first peelable support 12 is peeled to obtain a laminated body X30.
Below, each member used at this process is explained in full detail first, and the procedure of a process is explained in full detail after that.

(First peelable support)
A 1st peelable support is a member which supports the 1st alignment film and light absorption anisotropic layer which are mentioned later on the surface, and adheres to the 1st alignment film surface so that peeling is possible. As will be described later, when the first peelable support is peeled, peeling occurs between the first peelable support and the first alignment film.

Materials constituting the first peelable support include cellulose resin, acrylic resin, methacrylic resin, polycarbonate resin, polystyrene resin, polyolefin resin, cyclic polyolefin resin, glutaric anhydride resin, glutar Examples thereof include imide resins, cellulose resins, polyester resins, and mixed resins of a plurality of resins selected from these, and cellulose resins or polyester resins are preferred.
Note that the phase transition of the liquid crystal compound when forming the light absorption anisotropic layer described later may require heating at 120 to 150 ° C., and the heating of the first peelable support during production For the purpose of avoiding deformation due to the above, as the material constituting the first peelable support, cellulose acylate resin or polyethylene terephthalate is more preferable.
Furthermore, when adjusting the peeling force of a 1st peelable support body, a hydrophilic treatment may be given to the surface of a 1st peelable support body. Therefore, cellulose acylate is more preferable as the material constituting the first peelable support because the peel force can be easily adjusted by hydrophilizing the surface of the first peelable support.

The first peelable support may have a single layer structure or a multilayer structure.
For example, when a 1st peelable support body is a multilayer structure, the aspect containing a support body and the coating layer arrange | positioned on a support body is mentioned.
Examples of the material constituting the support include the materials constituting the first peelable support described above. Moreover, the thickness of a support body is not specifically limited, The range similar to the thickness of the 1st peelable support body mentioned later is mentioned.
As the support, a transparent support is preferable.
The coating layer is not particularly limited as long as it is a layer that is detachably adhered to the first alignment film and satisfies the relationship with the peeling force of the second peelable support described later, and includes a resin layer.
The thickness of the coating layer is preferably 0.1 to 10 μm.

The thickness of the first peelable support is not particularly limited, but is preferably 100 μm or less, more preferably 80 μm or less, and further preferably 10 to 50 μm.

(First alignment film)
A 1st alignment film is a layer arrange | positioned on a 1st peelable support body, and is a layer which controls the orientation direction of the liquid crystalline compound in a light absorption anisotropic layer. The first alignment film is separated from the first peelable support together with the light absorption anisotropic layer.
The first alignment film may be any layer as long as the liquid crystalline compound contained in the composition containing the dichroic substance and the liquid crystalline compound can be brought into a desired alignment state.
The first alignment film is formed by rubbing treatment of an organic compound (preferably polymer) on the film surface, oblique deposition of an inorganic compound, formation of a layer having a microgroove, or an organic compound (Langmuir Blodget method (LB film)). For example, accumulation of ω-tricosanoic acid, dioctadecylmethylammonium chloride, methyl stearylate). Furthermore, an alignment film in which an alignment function is generated by application of an electric field, application of a magnetic field, or light irradiation is also known. Among these, an alignment film formed by rubbing treatment or a photo alignment film formed by light irradiation is preferable.

The polymer material used for the alignment film formed by the rubbing treatment is described in many documents, and many commercially available products are available. In the present invention, polyvinyl alcohol or polyimide and derivatives thereof (modified products) are preferable. Especially, as a polymer material, the polymer material which has a polymeric group is preferable, and the polyvinyl alcohol which has a polymeric group is more preferable. Examples of the polymerizable group include a (meth) acryloyl group and a vinyl group.
With respect to the alignment film, reference can be made to the description on page 43, line 24 to page 49, line 8 of International Publication WO01 / 88574A1.
The thickness of the alignment film is preferably 0.01 to 10 μm, and more preferably 0.01 to 1 μm.

A number of documents describe the photo-alignment material used for the alignment film formed by light irradiation. For example, JP 2006-285197 A, JP 2007-076839 A, JP 2007-138138 A, JP 2007-040771 A, JP 2007-121721 A, JP 2007-140465 A, Azo compounds described in JP 2007-156439 A, JP 2007-133184 A, JP 2009-109831 A, JP 3888848 A, Patent 4151746 Aroma described in JP 2002-229039 A Group ester compounds, maleimide and / or alkenyl-substituted nadiimide compounds having photo-alignment units described in JP-A Nos. 2002-265541 and 2002-31703, and light described in Japanese Patent No. 4205195 and Japanese Patent No. 4205198 Crosslinkable silane derivative Kohyo 2003-520878, JP-T-2004-529220 discloses, or photocrosslinkable polyimide described in Japanese Patent No. 4162850, polyamides or esters. Of these, azo compounds, photocrosslinkable polyimides, polyamides, or polyesters are preferable.

The coating film formed from the above material is irradiated with linearly polarized light or non-polarized light to produce a photo-alignment film.
In this specification, “linearly polarized light irradiation” and “non-polarized light irradiation” are operations for causing a photoreaction in the photo-alignment material. The wavelength of the light used varies depending on the photo-alignment material used, and is not particularly limited as long as it is a wavelength necessary for the photoreaction. The peak wavelength of light used for light irradiation is preferably 200 to 700 nm, and more preferably ultraviolet light having a peak wavelength of light of 400 nm or less.

Light sources used for light irradiation include, for example, tungsten lamps, halogen lamps, xenon lamps, xenon flash lamps, mercury lamps, mercury xenon lamps and carbon arc lamps, various lasers [eg, semiconductor lasers, helium neon lasers, argon Ion laser, helium cadmium laser and YAG (yttrium-aluminum-garnet) laser], light emitting diode, and cathode ray tube.

Examples of means for obtaining linearly polarized light include a method using a polarizing plate, a method using a reflective polarizer utilizing a prism element or Brewster angle, and a method using light emitted from a laser light source having polarization. . Moreover, you may selectively irradiate only the light of the required wavelength using a filter or a wavelength conversion element.

In the case of linearly polarized light, a method of irradiating light from the upper surface or the back surface to the coating film surface from the perpendicular or oblique direction is adopted. The incident angle of light varies depending on the photo-alignment material, but is preferably 0 to 90 ° (vertical), and more preferably 40 to 90 °.
In the case of non-polarized light, the non-polarized light is irradiated obliquely to the coating film. The incident angle is preferably 10 to 80 °, more preferably 20 to 60 °, and further preferably 30 to 50 °.
The irradiation time is preferably 1 to 60 minutes, and more preferably 1 to 10 minutes.

The average refractive index of the first alignment film at a wavelength of 550 nm is not particularly limited, and is often 1.40 to 2.00. In particular, the display performance when the optical laminate is disposed in the display element is more excellent. In this respect, 1.55-1.80 is preferable.
In addition, the refractive index anisotropy of the first alignment film at a wavelength of 550 nm is not particularly limited, and is preferably 0.1 to 0.3 from the viewpoint that the display performance when the optical laminate is disposed in the display element is more excellent.
Since the light absorption anisotropic layer often has a high refractive index anisotropy, the average of the first alignment film is reduced in reducing interface reflection between the first alignment film and the light absorption anisotropic layer. It is preferable that the refractive index and the refractive index anisotropy are high.
The average refractive index is measured using a spectroscopic ellipsometry M-2000U manufactured by Woollam. X-axis direction in which the refractive index maximum in a plane, y-axis and the direction perpendicular to it, a normal direction and z-axis relative to the plane, the refractive index of the first alignment layer in each direction n _x, n _y, is defined as _{n z.} The average refractive index (n _ave ) and in-plane refractive index anisotropy (Δn) in the present invention are represented by the following formulas (1) and (2), respectively.
Formula (1) n _ave = (n _x + _ny + _nz ) / 3
Formula (2) Δn = n _x −n _y

(Light absorption anisotropic layer)
The light absorption anisotropic layer is a layer formed using a composition containing a dichroic substance and a liquid crystal compound. The light absorption anisotropic layer is a layer whose degree of light absorption differs depending on the direction, and usually has an absorption axis and a polarization axis (transmission axis).

The dichroic substance is not particularly limited, and a visible light absorbing substance (dichroic dye), a light emitting substance (fluorescent substance, phosphorescent substance), an ultraviolet absorbing substance, an infrared absorbing substance, a nonlinear optical substance, a carbon nanotube, and an inorganic substance (For example, quantum rods) and the like, and conventionally known dichroic substances (dichroic dyes) can be used.
Specifically, paragraphs [0067] to [0071] of JP 2013-228706 A, paragraphs [0008] to [0026] of JP 2013-227532 A, and [0008] of JP 2013-209367 A. [0015] Paragraph, [0045] to [0058] Paragraph of JP2013-014883A, [0012] to [0029] Paragraph of JP2013-109090A, [0009] of JP2013-101328A. ] To [0017] paragraphs, paragraphs [0051] to [0065] of JP 2013-037353 A, paragraphs [0049] to [0073] of JP 2012-063387 A, [11] Paragraphs [0016] to [0018], paragraphs [0009] to [0011] of JP-A-2001-133630. [0030] to [0169] of JP 2011-215337 A, [0021] to [0075] paragraphs of JP 2010-106242 A, and [0011] to [0025] paragraphs of JP 2010-215846 A. [0017] to [0069] paragraphs of JP2011-048411A, paragraphs [0013] to [0133] of JP2011-213610A, and [0074] to [0246] of JP2011-237513A. Paragraphs, paragraphs [0022] to [0080] of Japanese Patent Application No. 2015-001425, paragraphs [0005] to [0051] of Japanese Patent Application No. 2016-006502, and paragraphs [0005] to [0041] of WO 2016/060173. , WO2016 / 136561, paragraphs [0008] to [0062], Japanese Patent Application No. 2 [0014] to [0033] paragraph of Japanese Patent Application No. 16-04909, paragraphs [0014] to [0033] of Japanese Patent Application No. 2016-044910, paragraphs [0013] to [0037] of Japanese Patent Application No. 2016-095907, and And those described in paragraphs [0014] to [0034] of Japanese Patent Application No. 2017-045296.

In the present invention, two or more kinds of dichroic substances may be used in combination. For example, from the viewpoint of making the light absorption anisotropic layer close to black, at least one kind having a maximum absorption wavelength in the wavelength range of 370 to 550 nm. These dye compounds and at least one dye compound having a maximum absorption wavelength in the wavelength range of 500 to 700 nm may be used in combination.

The dichroic material may have a crosslinkable group.
Examples of the crosslinkable group include a (meth) acryloyl group, an epoxy group, an oxetanyl group, and a styryl group, and among them, a (meth) acryloyl group is preferable.

As the dichroic substance, a compound represented by the formula (1) is preferable.

In formula (1), A ¹ , A ² and A ³ each independently represents a divalent aromatic group which may have a substituent. L ¹ and L ² each independently represent a substituent. m represents an integer of 1 to 4, and when m is an integer of 2 to 4, a plurality of A ² may be the same or different from each other. In addition, m is preferably 1 or 2.

The “divalent aromatic group which may have a substituent” represented by A ¹ , A ² and A ^{3 in the} above formula (1) will be described.
Examples of the substituent include substituent group G described in paragraphs [0237] to [0240] of JP2011-237513A, among which a halogen atom, an alkyl group, an alkoxy group, an alkoxycarbonyl Group or an aryloxycarbonyl group is preferable, an alkyl group is more preferable, and an alkyl group having 1 to 5 carbon atoms is more preferable.
Examples of the divalent aromatic group include a divalent aromatic hydrocarbon group and a divalent aromatic heterocyclic group.
Examples of the divalent aromatic hydrocarbon group include an arylene group having 6 to 12 carbon atoms, and specific examples include a phenylene group, a cumenylene group, a mesitylene group, a tolylene group, and a xylylene group. . Of these, a phenylene group is preferable.
Further, the divalent aromatic heterocyclic group is preferably a monocyclic or bicyclic heterocyclic ring-derived group. Examples of atoms other than carbon atoms that constitute the aromatic heterocyclic group include nitrogen atoms, sulfur atoms, and oxygen atoms. When the aromatic heterocyclic group has a plurality of atoms constituting a ring other than a carbon atom, these may be the same or different. Specific examples of the aromatic heterocyclic group include pyridylene group (pyridine-diyl group), quinolylene group (quinoline-diyl group), isoquinolylene group (isoquinoline-diyl group), benzothiadiazole-diyl group, phthalimido-diyl group And a thienothiazole-diyl group (hereinafter abbreviated as “thienothiazole group”).
Of the divalent aromatic groups, divalent aromatic hydrocarbon groups are preferred.

Here, any one of A ¹ , A ² and A ³ is preferably a divalent thienothiazole group which may have a substituent. In addition, the specific example of the substituent of a bivalent thienothiazole group is the same as the substituent in the "divalent aromatic group which may have a substituent" mentioned above, and its preferable aspect is also the same.
Of A ¹ , A ² and A ³ , A ² is more preferably a divalent thienothiazole group. In this case, A ¹ and A ³ represent a divalent aromatic group which may have a substituent.
When A ² is a divalent thienothiazole group, it is preferable that at least one of A ¹ and A ^{3 is} a divalent aromatic hydrocarbon group which may have a substituent, and A ¹ and It is more preferable that both of A ³ are divalent aromatic hydrocarbon groups which may have a substituent.

The “substituent” represented by L ¹ and L ^{2 in the} above formula (1) will be described.
Examples of the substituent include a group introduced to enhance solubility or nematic liquid crystal property, an electron donating or electron withdrawing group introduced to adjust the color tone as a pigment, or fixing the orientation. Therefore, a group having a crosslinkable group (polymerizable group) to be introduced is preferable.
For example, as the substituent, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amino group, an alkoxy group, an oxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group Sulfonylamino group, sulfamoyl group, carbamoyl group, alkylthio group, arylthio group, sulfonyl group, sulfinyl group, ureido group, phosphoramido group, hydroxy group, mercapto group, halogen atom, cyano group, nitro group, hydroxamic acid group, Examples thereof include a sulfino group, a hydrazino group, an imino group, an azo group, a heterocyclic group, and a silyl group.
These substituents may be further substituted with these substituents. Moreover, when it has two or more substituents, they may be the same or different. If possible, they may be bonded to each other to form a ring.

As the substituent represented by L ¹ and L ² , an alkyl group which may have a substituent, an alkenyl group which may have a substituent, an alkynyl group which may have a substituent, a substituent Aryl group which may have a group, alkoxy group which may have a substituent, oxycarbonyl group which may have a substituent, acyloxy group which may have a substituent, substituent An acylamino group which may have a substituent, an amino group which may have a substituent, an alkoxycarbonylamino group which may have a substituent, a sulfonylamino group which may have a substituent, a substituent A sulfamoyl group which may have a group, a carbamoyl group which may have a substituent, an alkylthio group which may have a substituent, a sulfonyl group which may have a substituent, a substituent Have A good ureido group, nitro group, hydroxy group, cyano group, imino group, azo group, halogen atom, or heterocyclic group, more preferably an alkyl group that may have a substituent or a substituent. An alkenyl group that may have a substituent, an aryl group that may have a substituent, an alkoxy group that may have a substituent, an oxycarbonyl group that may have a substituent, and a substituent An acyloxy group which may be substituted, an amino group which may have a substituent, a nitro group, an imino group, or an azo group.

At least one of L ¹ and L ² preferably includes a crosslinkable group (polymerizable group), more preferably contains a crosslinkable group in both L ¹ and L ^2.
Specific examples of the crosslinkable group include polymerizable groups described in paragraphs [0040] to [0050] of JP 2010-244038 A. From the viewpoint of reactivity and synthesis suitability, an acryloyl group, A methacryloyl group, an epoxy group, an oxetanyl group, or a styryl group is preferable, and an acryloyl group or a methacryloyl group is more preferable.

Preferable embodiments of L ¹ and L ² include an alkyl group substituted with the crosslinkable group, a dialkylamino group substituted with the crosslinkable group, and an alkoxy group substituted with the crosslinkable group. .

As the dichroic substance, a compound represented by the formula (2) is also preferable.

In the above formula (2), C ¹ and C ² each independently represent a monovalent substituent. However, at least one of C ¹ and C ² represents a crosslinkable group.
M ¹ and M ² each independently represents a divalent linking group. However, at least one of M ¹ and M ² has 4 or more main chain atoms.
Ar ¹ and Ar ² are each independently any one of a phenylene group that may have a substituent, a naphthylene group that may have a substituent, and a biphenylene group that may have a substituent. Represents a group.
E represents one of a nitrogen atom, an oxygen atom, and a sulfur atom.
R ¹ represents a hydrogen atom or a substituent.
R ² represents a hydrogen atom or an alkyl group which may have a substituent.
n represents 0 or 1. However, n is 1 when E is a nitrogen atom, and n is 0 when E is an oxygen atom or a sulfur atom.

The monovalent substituent represented by C ¹ and C ² in formula (2) will be described.
Examples of the monovalent substituent represented by C ¹ and C ² include a group introduced to enhance the solubility or nematic liquid crystal property of the azo compound, and an electron donating property and an electron introduced to adjust the color tone as a dye. A group having attraction or a crosslinkable group (polymerizable group) introduced to fix the orientation is preferred.
For example, as the substituent, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amino group, an alkoxy group, an oxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group Sulfonylamino group, sulfamoyl group, carbamoyl group, alkylthio group, arylthio group, sulfonyl group, sulfinyl group, ureido group, phosphoramido group, hydroxy group, mercapto group, halogen atom, cyano group, nitro group, hydroxamic acid group, Examples thereof include a sulfino group, a hydrazino group, an imino group, an azo group, a heterocyclic group, and a silyl group.
These substituents may be further substituted with these substituents. Moreover, when it has two or more substituents, they may be the same or different. If possible, they may be bonded to each other to form a ring.

In the formula (2), at least one of C ¹ and C ² represents a crosslinkable group, and both C ¹ and C ² are crosslinkable groups from the viewpoint that the durability of the light absorption anisotropic layer is more excellent. Preferably there is.
Specific examples of the crosslinkable group include polymerizable groups described in paragraphs [0040] to [0050] of JP 2010-244038 A. From the viewpoint of reactivity and suitability for synthesis, an acryloyl group, A methacryloyl group, an epoxy group, an oxetanyl group or a styryl group is preferred, and an acryloyl group or a methacryloyl group is preferred.

The divalent linking group represented by M ¹ and M ² in formula (2) will be described.
Examples of the divalent linking group include —O—, —S—, —CO—, —COO—, —OCO—, —O—CO—O—, —CO—NR ^N —, —O—CO—. NR ^N —, —SO ₂ —, —SO—, an alkylene group, a cycloalkylene group, an alkenylene group, a group in which two or more of these groups are combined, and the like can be given.
Among them, an alkylene group, —O—, —S—, —CO—, —COO—, —OCO—, —O—CO—O—, —CO—NR ^N —, —O—CO—NR ^N — , A group in which one or more groups selected from the group consisting of —SO ₂ — and —SO— are combined is preferable. Incidentally, R ^N represents a hydrogen atom or an alkyl group.

In addition, at least one of M ¹ and M ² has 4 or more main chain atoms, preferably 7 or more, and more preferably 10 or more. Further, the upper limit of the number of atoms in the main chain is preferably 20 or less, and more preferably 15 or less.
Here, the “main chain” in M ¹ refers to a portion necessary for directly connecting “C ¹ ” and “Ar ¹ ” in formula (2), and “the number of atoms in the main chain” means , Refers to the number of atoms constituting the part. Similarly, the “main chain” in M ² refers to a part necessary for directly connecting “C ² ” and “E” in formula (2), and “the number of atoms in the main chain” This refers to the number of atoms constituting the above part. The “number of main chain atoms” does not include the number of branched chain atoms described later.
Specifically, in the following formula (D7), the number of atoms in the main chain of M1 is 6 (the number of atoms in the dotted frame on the left side of the following formula (D7)), and the atoms in the main chain of M2 Is 7 (the number of atoms in the dotted frame on the right side of the following formula (D7)).

At least one of M ¹ and M ² may be a group having 4 or more main chain atoms, and if the number of atoms in one main chain of M ¹ and M ² is 4 or more, the other The number of atoms in the main chain may be 3 or less.
The total number of atoms in the main chain of M ¹ and M ² is preferably 5 to 30, more preferably 7 to 27. When the total number of atoms in the main chain is 5 or more, the dichroic material is more easily polymerized, and the total number of atoms in the main chain is 30 or less, so that the degree of orientation is excellent. A light absorption anisotropic layer can be obtained, or a melting point of the dichroic substance can be increased and a light absorption anisotropic layer having excellent heat resistance can be obtained.

M ¹ and M ² may have a branched chain. Here, the “branched chain” in M ¹ refers to a portion other than the portion necessary for directly connecting C ¹ and Ar ¹ in Formula (2). Similarly, the “branched chain” in M ² refers to a portion other than the portion necessary for directly connecting C ² and E in Formula (2).
The number of branched chain atoms is preferably 3 or less. When the number of branched chain atoms is 3 or less, there is an advantage that the degree of orientation of the light absorption anisotropic layer is further improved. Note that the number of branched atoms does not include the number of hydrogen atoms.

In the formula (2), Ar ¹ and Ar ² represent “an optionally substituted phenylene group”, “an optionally substituted naphthylene group”, and “having a substituent. The “biphenylene group” may be described.
The substituent is not particularly limited, and is a halogen atom, alkyl group, alkyloxy group, alkylthio group, oxycarbonyl group, thioalkyl group, acyloxy group, acylamino group, alkoxycarbonylamino group, sulfonylamino group, sulfamoyl group, carbamoyl group. , A sulfinyl group, a ureido group, and the like. These substituents may be further substituted with these substituents. Of these, an alkyl group is preferable, an alkyl group having 1 to 5 carbon atoms is more preferable, and a methyl group and an ethyl group are further preferable from the viewpoint of easy availability of raw materials and the degree of orientation.
Ar ¹ and Ar ² are a phenylene group that may have a substituent, a naphthylene group that may have a substituent, or a biphenylene group that may have a substituent. A phenylene group is preferable from the viewpoint of easy availability of a raw material which may have a diol and a degree of orientation.
In the formula (2), ^{"M 1"} for coupling the Ar ¹ and "N" is preferably located in the para position of Ar ^1. Further, “E” and “N” linked to Ar ² are preferably located at the para position in Ar ¹ .

In the above formula (2), E represents one of a nitrogen atom, an oxygen atom and a sulfur atom, and is preferably a nitrogen atom from the viewpoint of suitability for synthesis.
Further, from the viewpoint that it becomes easy to make a dichroic substance having absorption on the short wavelength side (for example, having a maximum absorption wavelength in the vicinity of 500 to 530 nm), E in the above formula (2) is And preferably an oxygen atom.
On the other hand, from the viewpoint that it becomes easy to make a dichroic substance having absorption on the long wavelength side (for example, having a maximum absorption wavelength in the vicinity of 600 nm), E in the above formula (2) is nitrogen. It is preferably an atom.

In the above formula (2), R ¹ represents a hydrogen atom or a substituent.
Specific examples and preferred embodiments of the “substituent” represented by R ¹ are the same as the substituents in Ar ¹ and Ar ² described above, and the preferred embodiments are also the same, and thus the description thereof is omitted.

In the above formula (2), R ^2, have a hydrogen atom or a substituent represents an alkyl group, an alkyl group is preferred which may have a substituent.
Examples of the substituent include a halogen atom, a hydroxyl group, an ester group, an ether group, and a thioether group.
Examples of the alkyl group include linear, branched or cyclic alkyl groups having 1 to 8 carbon atoms. Of these, a linear alkyl group having 1 to 6 carbon atoms is preferable, a linear alkyl group having 1 to 3 carbon atoms is more preferable, and a methyl group or an ethyl group is further preferable.
R ² is a group present in the formula (2) when E is a nitrogen atom (that is, n = 1 is meant). On the other hand, R ² is a group that does not exist in the formula (2) when E is an oxygen atom or a sulfur atom (that is, n = 0 is meant).

In the above formula (2), n represents 0 or 1. However, n is 1 when E is a nitrogen atom, and n is 0 when E is an oxygen atom or a sulfur atom.

As the dichroic substance, a compound represented by the formula (3) is also preferable.

In formula (3), A and B each independently represent a crosslinkable group. a and b each independently represents 0 or 1; However, a + b ≧ 1. When a = 0, L ₁ represents a monovalent substituent, and when a = 1, L ₁ represents a single bond or a divalent linking group. Further, when b = 0, L ₂ represents a monovalent substituent, and when b = 1, L ₂ represents a single bond or a divalent linking group. Ar ₁ represents an (n1 + 2) -valent aromatic hydrocarbon group or heterocyclic group, Ar ₂ represents an (n2 + 2) -valent aromatic hydrocarbon group or heterocyclic group, and Ar ₃ represents an (n3 + 2) -valent aromatic group A hydrocarbon group or a heterocyclic group is represented. R ₁ , R ₂ and R ₃ each independently represents a monovalent substituent. When n1 ≧ 2, the plurality of R ₁ may be the same or different from each other, and when n2 ≧ 2, the plurality of R ₂ may be the same or different from each other, and when n3 ≧ 2 The plurality of R ₃ may be the same as or different from each other. k represents an integer of 1 to 4. When k ≧ 2, the plurality of Ar ₂ may be the same as or different from each other, and the plurality of R ₂ may be the same as or different from each other. n1, n2 and n3 each independently represents an integer of 0 to 4. However, when k = 1, n1 + n2 + n3 ≧ 0, and when k ≧ 2, n1 + n2 + n3 ≧ 1.

In the formula (3), examples of the crosslinkable group represented by A and B include polymerizable groups described in paragraphs [0040] to [0050] of JP 2010-244038 A. Of these, (meth) acryloyl group, epoxy group, oxetanyl group or styryl group is preferable from the viewpoint of improving reactivity and synthesis suitability, and (meth) acryloyl group is more preferable from the viewpoint of improving solubility. preferable.

In formula (3), a and b each independently represent 0 or 1, but a + b ≧ 1. That is, the compound represented by the formula (3) has at least one crosslinkable group at the terminal.
Here, it is preferable that a and b are both 1, that is, a crosslinkable group is introduced at both ends of the compound represented by the formula (3).

In Formula (3), when a = 0, L ₁ represents a monovalent substituent, and when a = 1, L ₁ represents a single bond or a divalent linking group. Further, when b = 0, L ₂ represents a monovalent substituent, and when b = 1, L ₂ represents a single bond or a divalent linking group.
L ₁ and L ₂ are preferably both a single bond or a divalent linking group, and more preferably both are a divalent linking group.

The monovalent substituent represented by L ₁ and L ₂ is a group introduced to increase the solubility of the dichroic substance, or an electron donating or electron introduced to adjust the color tone as a dye. A group having an attractive property is preferred.
For example, as the substituent, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a substituted or unsubstituted amino group, an alkoxy group, an oxycarbonyl group, an acyloxy group, an acylamino group, an alkoxycarbonylamino group, an aryloxycarbonylamino group Sulfonylamino group, sulfamoyl group, carbamoyl group, alkylthio group, arylthio group, sulfonyl group, sulfinyl group, ureido group, phosphoric acid amide group, heterocyclic group, silyl group, halogen atom, hydroxy group, mercapto group, cyano group, Examples thereof include a nitro group, a hydroxamic acid group, a sulfino group, a hydrazino group, an imino group, and an azo group.
These substituents may be further substituted with these substituents. Moreover, when it has two or more substituents, they may be the same or different. If possible, they may be bonded to each other to form a ring.
Examples of the group in which the above substituent is further substituted with the above substituent include an R _B — (O—R _A ) _na — group, which is a group in which an alkoxy group is substituted with an alkyl group. Here, in the formula, R _A represents an alkylene group having 1 to 5 carbon atoms, R _B represents an alkyl group having 1 to 5 carbon atoms, and na is 1 to 10 (preferably 1 to 5, more preferably 1). Represents an integer of ~ 3).
Among them, examples of the monovalent substituent represented by L ₁ and L ₂ include an alkyl group, an alkenyl group, an alkoxy group, and a group in which these groups are further substituted with these groups (for example, the above-described R _B — (O—R _A ) _na — group) is preferable, and an alkyl group, an alkoxy group, and a group in which these groups are further substituted with these groups (for example, R _B — (O—R _A ) _na — described above) Group) is more preferred.

Examples of the divalent linking group represented by L ₁ and L ₂ include —O—, —S—, —CO—, —COO—, —OCO—, —O—CO—O—, —CO—NR _N -, -O-CO-NR _N- , -NR _N -CO-NR _N- , -SO _2- , -SO-, an alkylene group, a cycloalkylene group, an alkenylene group, and two of these groups The group combined above is mentioned.
Of these, a group obtained by combining an alkylene group and one or more groups selected from the group consisting of —O—, —COO—, —OCO—, and —O—CO—O— is preferable.
Here, _RN represents a hydrogen atom or an alkyl group. When a plurality of _RNs are present, the plurality of _RNs may be the same as or different from each other.

From the viewpoint of further improving the solubility of the compound represented by the formula (3), the number of atoms in the main chain of at least one of L ₁ and L ₂ is preferably 3 or more, and 5 or more. More preferably, it is more preferably 7 or more, and particularly preferably 10 or more. Further, the upper limit of the number of atoms in the main chain is preferably 20 or less, and more preferably 12 or less.
On the other hand, from the viewpoint of further improving the degree of orientation of the light absorption anisotropic layer, the number of atoms in the main chain of at least one of L ₁ and L ₂ is preferably 1 to 5.
Here, if there is A in the formula (3) is the "backbone" of the L _1, and "O" atoms connecting the L _1, needed to join the "A", the direct The term “number of atoms in the main chain” refers to the number of atoms constituting the part. Similarly, if there is a B in the formula (3) is the "backbone" of the L _2, and "O" atoms connecting the L _2, necessary for connection with "B", the direct The term “number of atoms in the main chain” refers to the number of atoms constituting the above-mentioned portion. The “number of main chain atoms” does not include the number of branched chain atoms described later.
Further, when A is not present, the "number of the main chain of atoms" in L _1, refers to the number of L ₁ containing no branched chain atoms. If B is not present, the "number of the main chain of atoms" in L _2, refers to the number of L ₂ containing no branched chain atoms.
Specifically, in the following formula (D1), the number of atoms in the main chain of L ₁ is 5 (the number of atoms in the dotted frame on the left side of the following formula (D1)), and the main chain of L ₂ The number of atoms is 5 (the number of atoms in the dotted frame on the right side of the following formula (D1)). In the following formula (D10), the number of atoms in the main chain of L ₁ is 7 (the number of atoms in the dotted frame on the left side of the following formula (D10)), and the number of atoms in the main chain of L ₂ The number is 5 (the number of atoms in the dotted frame on the right side of the following formula (D10)).

L ₁ and L ₂ may have a branched chain.
Here, if A is present in the formula (3) is directly connected to the "branched" in L _1, and "O" atoms connecting the L ₁ in formula (3), "A", a The part other than the part necessary to do. Similarly, when there is B in Equation (3) is directly connected to the "branched" in L _2, and "O" atoms connecting the L ₂ in Formula (3), "B", the The part other than the part necessary to do.
Further, when A is absent in the formula (3), a "branched" in L _1, wherein the longest chain of atoms (or main extending starting from the "O" atoms connecting the L ₁ in (3) The part other than the chain). Similarly, in the absence of B in the formula (3), a "branched" in L _2, is connected to the L ₂ in Formula (3) "O" atoms longest atomic chain extending starting (i.e. The part other than the main chain).
The number of branched atoms is preferably 3 or less. When the number of branched chain atoms is 3 or less, there is an advantage that the degree of orientation of the light absorption anisotropic layer is further improved. Note that the number of branched atoms does not include the number of hydrogen atoms.

In the formula (3), Ar ₁ is an (n1 + 2) valence (eg, trivalent when n1 is 1), Ar ₂ is an (n2 + 2) valence (eg, trivalent when n2 is 1), Ar ₃ Represents an (n3 + 2) -valent aromatic hydrocarbon group or heterocyclic group (for example, trivalent when n3 is 1). Here, Ar ₁ to Ar ₃ can be rephrased as a divalent aromatic hydrocarbon group or a divalent heterocyclic group each substituted with n1 to n3 substituents (R ₁ to R ₃ described later).
The divalent aromatic hydrocarbon group represented by Ar ₁ to Ar ₃ may be monocyclic or have a condensed structure of two or more rings. The number of rings of the divalent aromatic hydrocarbon group is preferably 1 to 4, more preferably 1 to 2, and still more preferably 1 (that is, a phenylene group) from the viewpoint of further improving the solubility.
Specific examples of the divalent aromatic hydrocarbon group include a phenylene group, an azulene-diyl group, a naphthylene group, a fluorene-diyl group, an anthracene-diyl group, and a tetracene-diyl group, and the solubility is further improved. From this viewpoint, a phenylene group or a naphthylene group is preferable, and a phenylene group is more preferable.
The divalent heterocyclic group may be either aromatic or non-aromatic, but a divalent aromatic heterocyclic group is preferred from the viewpoint of improving the degree of orientation.
The divalent aromatic heterocyclic group may be monocyclic or may have a condensed structure of two or more rings. Examples of atoms other than carbon constituting the aromatic heterocyclic group include nitrogen atom, sulfur atom and oxygen atom. When the aromatic heterocyclic group has a plurality of atoms constituting a ring other than carbon, these may be the same or different.
Specific examples of the aromatic heterocyclic group include, for example, pyridylene group (pyridine-diyl group), thienylene (thiophene-diyl group), quinolylene group (quinoline-diyl group), isoquinolylene group (isoquinoline-diyl group), thiazole- Examples thereof include a diyl group, a benzothiadiazole-diyl group, a phthalimido-diyl group, a thienothiazole-diyl group, a thienothiophene-diyl group, and a thienoxazole-diyl group.
Among the above, the divalent aromatic heterocyclic group is preferably a monocyclic group or a group having a bicyclic condensed ring structure represented by the following structural formula. In the structural formula below, “*” represents a bonding position with an azo group or an oxygen atom in the general formula (1).

In the formula (3), Ar ₁ to Ar ₃ are preferably divalent aromatic hydrocarbon groups, and preferably phenylene groups.
Here, when Ar ₁ is a phenylene group, the oxygen atom and azo group bonded to Ar ₁ are preferably located at the meta position or para position, and more preferably located at the para position. Thereby, the orientation degree of a light absorption anisotropic layer improves more. From the same viewpoint, when Ar ₂ is a phenylene group, the two azo groups bonded to Ar ₂ are preferably located at the meta position or para position, and more preferably located at the para position. Similarly, when Ar ₃ is a phenylene group, the oxygen atom and azo group bonded to Ar ₃ are preferably located at the meta position or para position, and more preferably located at the para position.

In Formula (3), when Ar ₁ , Ar _2, and Ar ₃ have a condensed ring structure, a plurality of rings constituting the condensed ring structure are all in the longitudinal direction of the structure represented by Formula (3). It is preferable to connect along. Thereby, since it can suppress that the molecule | numerator of a dichroic substance becomes bulky in the direction (short direction) which cross | intersects a longitudinal direction, the orientation of a molecule | numerator becomes favorable and the orientation degree of a light absorption anisotropic layer becomes more. improves.
Here, the longitudinal direction of the structure represented by Formula (3) refers to the direction in which the structure represented by Formula (3) extends, and specifically, bonded to Ar ₁ , Ar _2, and Ar ₃ . This refers to the direction in which the bond of the azo group and the bond of the ether bond (oxygen atom) extend.
As a specific example of an embodiment in which all of a plurality of rings constituting the condensed ring structure are connected along the longitudinal direction of the structure represented by the formula (3), the condensed ring structure represented by the formula (Ar-1) Is shown below. That is, when Ar ₁ , Ar ₂ and Ar ₃ have a condensed ring structure, it preferably has a condensed ring structure represented by the following formula (A-1).

In the above formula (Ar-1), Ar _X , Ar _Y and Ar _Z each independently represent a benzene ring or a monocyclic heterocyclic ring. n represents an integer of 0 or more. * Represents a bonding position with an azo group or an oxygen atom in the formula (3).
The monocyclic heterocycle in the above formula (Ar-1) is preferably a monocyclic aromatic heterocycle. Examples of atoms other than carbon constituting the monocyclic aromatic heterocyclic group include a nitrogen atom, a sulfur atom and an oxygen atom. Specific examples of the monocyclic aromatic heterocycle include a pyridine ring, a thiophene ring, a thiazole ring, and an oxazole ring.
Ar _X , Ar _Y and Ar _Z may have a substituent. Examples of such a substituent include monovalent substituents in R ₁ to R ₃ described later.
n represents an integer of 0 or more, preferably 0 to 2, more preferably 0 to 1, and still more preferably 0.

In formula (3), R ₁ , R ₂ and R ₃ each independently represents a monovalent substituent.
The monovalent substituent represented by R ₁ , R ₂ and R ₃ is a halogen atom, cyano group, hydroxy group, alkyl group, alkoxy group, fluorinated alkyl group, —O— (C ₂ H ₄ O) m—R. ', -O- (C ₃ H ₆ O) m-R', alkylthio group, oxycarbonyl group, thioalkyl group, acyloxy group, acylamino group, alkoxycarbonylamino group, sulfonylamino group, sulfamoyl group, carbamoyl group, sulfinyl group Or a ureido group is preferred. Here, R ′ represents a hydrogen atom, a methyl group or an ethyl group, and m represents an integer of 1 to 6. These substituents may be further substituted with these substituents.
Among them, the monovalent substituent represented by R ₁ , R ₂ and R ₃ is a fluorine atom, a chlorine atom, a methyl group, an ethyl group, a propyl group, from the viewpoint that the solubility of the dichroic substance is further improved. Methoxy group, ethoxy group, propoxy group, hydroxy group, trifluoromethyl group, —O— (C ₂ H ₄ O) m—R ′, or —O— (C ₃ H ₆ O) m—R ′ is preferable. , A trifluoromethyl group, a methoxy group, a hydroxy group, —O— (C ₂ H ₄ O) m—R ′, or —O— (C ₃ H ₆ O) m—R ′ is more preferable.
In the monovalent substituent represented by R ₁ , R ₂ and R _3, the number of atoms in the main chain is from 1 to 2 from the viewpoint of the balance between the solubility of the dichroic material and the orientation of the light absorption anisotropic layer. 15 is preferable and 1 to 12 is more preferable. Here, in the monovalent substituent represented by R ₁ , R ₂ and R ₃ , the “number of main chain atoms” refers to the number of R ₁ , R ₂ or R ₃ atoms not including a branched chain. Say. The “branched chain” refers to a portion other than the longest atomic chain (that is, the main chain) extending from any _one of Ar ₁ to Ar ₃ in the formula (1).

When the formula (3) has at least one substituent selected from R ₁ , R ₂ and R _3, at least one condition selected from the following conditions (R1) to conditions (R3) is satisfied: It is preferable. Thereby, the solubility of the compound represented by Formula (3) improves more.
Condition (R1): In Ar ₁ , at least one R ₁ and an azo group are adjacent to each other Condition (R2): In Ar ₂ , at least one R ₂ and at least one azo group; Condition (R3): In Ar ₃ , at least one R ₃ and an azo group are adjacent to each other. As a specific example of the condition (R1), Ar ₁ is a phenylene group In some cases, an embodiment in which R ₁ is located in the ortho position with respect to the azo group bonded to Ar ₁ can be mentioned. As a specific example of the condition (R2), there is an embodiment in which when Ar ₂ is a phenylene group, R ₂ is located in the ortho position with respect to at least one azo group. As a specific example of the condition (R3), there is an embodiment in which, when Ar ₃ is a phenylene group, R ₃ is located at the ortho position with respect to the azo group bonded to Ar ₃ .

In the formula (3), k represents an integer of 1 to 4. Here, it is preferable that k is 2 or more from the viewpoint of excellent light resistance while ensuring excellent solubility. On the other hand, it is preferable that k is 1 from the viewpoint that the solubility of the dichroic material is superior.

In the formula (3), n1, n2 and n3 each independently represents an integer of 0 to 4, preferably 0 to 3.
Here, when k = 1, n1 + n2 + n3 ≧ 0. That is, when Formula (3) has a bisazo structure, sufficient solubility can be obtained regardless of the presence or absence of substituents (R ₁ to R _{3 in} Formula (3)), but the solubility is further improved. From the viewpoint, it preferably has a substituent.
In the case of k = 1, n1 + n2 + n3 is preferably 0 to 9, more preferably 1 to 9, and further preferably 1 to 5.
On the other hand, when k ≧ 2, n1 + n2 + n3 ≧ 1. That is, when Formula (3) has a trisazo structure, a tetrakisazo structure, or a pentakisazo structure, it has at least one substituent (R ₁ to R _{3 in} Formula (3)).
In the case of k ≧ 2, n1 + n2 + n3 is preferably 1 to 9, and more preferably 1 to 5.

(Liquid crystal compound)
When the liquid crystalline composition contains a liquid crystalline compound, the dichroic substance can be aligned with a high degree of orientation while suppressing the precipitation of the dichroic substance.
The liquid crystalline compound is a liquid crystalline compound that does not exhibit dichroism.
As the liquid crystalline compound, any of a low molecular liquid crystalline compound and a high molecular liquid crystalline compound can be used. Here, the “low molecular weight liquid crystalline compound” refers to a liquid crystalline compound having no repeating unit in the chemical structure. The “polymer liquid crystalline compound” refers to a liquid crystalline compound having a repeating unit in its chemical structure.
Examples of the low molecular liquid crystal compound include liquid crystal compounds described in JP 2013-228706 A.
Examples of the polymer liquid crystalline compound include the thermotropic liquid crystalline polymers described in JP2011-237513A. The polymer liquid crystalline compound may have a crosslinkable group (for example, an acryloyl group and a methacryloyl group) at the terminal.
A liquid crystalline compound may be used individually by 1 type, and may use 2 or more types together.
The content of the liquid crystal compound is preferably 25 to 2000 parts by weight, more preferably 33 to 1000 parts by weight, and more preferably 50 to 500 parts by weight with respect to 100 parts by weight of the dichroic substance in the liquid crystal composition. Is more preferable. When the content of the liquid crystal compound is within the above range, the degree of orientation of the light absorption anisotropic layer is further improved.

As the liquid crystalline compound, a polymer liquid crystalline compound containing a repeating unit represented by the formula (4) (also referred to as “repeating unit (4)” in the present specification) is preferable. In the repeating unit (4), the difference between the log P values of P1, L1, and SP1 and the log P value of M1 is 4 or more.

In formula (4), 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.

Specific examples of the main chain of the repeating unit represented by P1 include groups represented by the following formulas (P1-A) to (P1-D). From the viewpoint of diversity and easy handling, a group represented by the following formula (P1-A) is preferred.

In the formulas (P1-A) to (P1-D), “*” represents a bonding position with L1 in the formula (1). In the formula (P1-A), R ¹ represents a hydrogen atom or a methyl group. In the formula (P1-D), R ² represents an alkyl group.
The group represented by the formula (P1-A) is preferably a unit of a partial structure of poly (meth) acrylate obtained by polymerization of (meth) acrylate.
The group represented by the formula (P1-B) is preferably an ethylene glycol unit in polyethylene glycol obtained by polymerizing ethylene glycol.
The group represented by the formula (P1-C) is preferably a propylene glycol unit obtained by polymerizing propylene glycol.
The group represented by the formula (P1-D) is preferably a siloxane unit of polysiloxane obtained by condensation polymerization of silanol. Here, silanol is a compound represented by the formula Si (R ² ) ₃ (OH). In formula, several R < ² > represents a hydrogen atom or an alkyl group each independently. However, at least one of the plurality of R ² represents an alkyl group.

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—, —C (O) NR ³ —, —NR ³ C (O). -, -S (O) _2- , -NR ³ R ^4- and the like. In the formula, R ³ and R ⁴ each independently represent a hydrogen atom or an optionally substituted alkyl group having 1 to 6 carbon atoms. In the specific example of the divalent linking group, the left bond is bonded to P1, and the right bond is bonded to SP1.
When P1 is a group represented by the formula (P1-A), L1 is preferably a group represented by —C (O) O—.
When P1 is a group represented by the formulas (P1-B) to (P1-D), L1 is preferably a single bond.

The spacer group represented by SP1 is at least selected from the group consisting of an oxyethylene structure, an oxypropylene structure, a polysiloxane structure, and a fluorinated alkylene structure, because it easily exhibits liquid crystallinity and the availability of raw materials. It preferably contains one type of structure.
Here, the oxyethylene structure represented by SP1 is preferably a group represented by * — (CH ₂ —CH ₂ O) _n1 — *. In the formula, n1 represents an integer of 1 to 20, and * represents a bonding position with L1 or M1. n1 is preferably an integer of 2 to 10, more preferably an integer of 2 to 4, and further preferably 3 for the reason that the effect of the present invention is more excellent.
The oxypropylene structure represented by SP1 is preferably a group represented by * — (CH (CH ₃ ) —CH ₂ O) _n2 — *. In the formula, n2 represents an integer of 1 to 3, and * represents a bonding position with L1 or M1.
Further, the polysiloxane structure represented by SP1 is preferably a group represented by * — (Si (CH ₃ ) ₂ —O) _n3 — *. In the formula, n3 represents an integer of 6 to 10, and * represents a bonding position with L1 or M1.
In addition, the fluorinated alkylene structure represented by SP1 is preferably a group represented by * — (CF ₂ —CF ₂ ) _n4 — *. In the formula, n4 represents an integer of 6 to 10, and * represents a bonding position with L1 or M1.

The mesogenic group represented by M1 is a group showing the main skeleton of liquid crystal molecules that contribute to liquid crystal formation. The liquid crystal molecules exhibit liquid crystallinity that is an intermediate state (mesophase) between a crystalline state and an isotropic liquid state. The mesogenic group is not particularly limited. For example, “Flushage Kristall in Table II” (VEB Deutsche Verlag fur Grundoff Industrie, Leipzig, published in 1984). You can refer to the Liquid Crystal Handbook (Maruzen, 2000), especially the description in Chapter 3.
As the mesogenic group, 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 is preferable.
The mesogenic group preferably has an aromatic hydrocarbon group, more preferably has 2 to 4 aromatic hydrocarbon groups, for the reason that the effect of the present invention is more excellent, and has 3 aromatic hydrocarbon groups. More preferably,

As the mesogenic group, the following formula (M1-A) or the following formula (M1-M1) can be used because the liquid crystallinity expression, liquid crystal phase transition temperature adjustment, raw material availability and synthesis suitability are more excellent, and the effects of the present invention are more excellent. A group represented by B) is preferred, and a group represented by formula (M1-B) is more preferred.

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

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. A variety of mesogenic skeleton designs and availability of raw materials From the viewpoint of properties, a phenylene group or a naphthylene group is preferable, and a phenylene group is more preferable.

The divalent heterocyclic group represented by A1 may be either aromatic or non-aromatic, but from the viewpoint of further improving the degree of orientation of the dichroic substance, a divalent aromatic heterocyclic group. Is preferred.
Examples of atoms other than carbon constituting the divalent aromatic heterocyclic group include a nitrogen atom, a sulfur atom and an oxygen atom. When the aromatic heterocyclic group has a plurality of atoms constituting a ring other than carbon, these may be the same or different.
Specific examples of the divalent aromatic heterocyclic group include, for example, pyridylene group (pyridine-diyl group), pyridazine-diyl group, imidazole-diyl group, thienylene (thiophene-diyl group), quinolylene group (quinoline-diyl group). ), Isoquinolylene group (isoquinoline-diyl group), oxazole-diyl group, thiazole-diyl group, oxadiazole-diyl group, benzothiazol-diyl group, benzothiadiazole-diyl group, phthalimido-diyl group, thienothiazole-diyl group , Thiazolothiazole-diyl group, thienothiophene-diyl group, and thienoxazole-diyl group.

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

In the formula (M1-A), a1 represents an integer of 1 to 10. When a1 is 2 or more, the plurality of A1s may be the same or different.

In the formula (M1-B), A2 and A3 are each independently 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 the formula (M1-A), and thus description thereof is omitted.
In formula (M1-B), a2 represents an integer of 1 to 10, and when a2 is 2 or more, a plurality of A2 may be the same or different, and a plurality of A3 may be the same or different. The plurality of LA1s may be the same or different. a2 is preferably an integer of 2 or more, more preferably 2, for the reason that the effect of the present invention is more excellent.
In the formula (M1-B), when a2 is 1, LA1 is a divalent linking group. When a2 is 2 or more, the plurality of LA1 are each independently a single bond or a divalent linking group, and at least one of the plurality of LA1 is a divalent linking group. When a2 is 2, for the reason that the effect of the present invention is more excellent, it is preferable that one of the two LA1s is a divalent linking group and the other is a single bond.

In the formula (M1-B), the divalent linking group represented by LA1 includes —O—, — (CH ₂ ) _g —, — (CF ₂ ) _g —, —Si (CH ₃ ) ₂ —, — ( Si (CH ₃ ) ₂ O) _g -,-(OSi (CH ₃ ) ₂ ) _g- (g represents an integer of 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-, -O-C (O) O-, -N (Z) C (O)-, -C (O) N (Z)-, -C (Z) = C ( Z ′) — C (O) O—, —O—C (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 ′) − (O) -S-, -SC (O) -C (Z) = C (Z ')-, -C (Z) = NN = C (Z')-(Z, Z ', Z Each independently represents 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-, -S (O)-, -S (O) (O)-,-(O) S (O) O-, -O (O) S (O) O-, -SC (O)- And -C (O) S-, etc. Among them, -C (O) O- is preferable because the effect of the present invention is more excellent LA1 is a combination of two or more of these groups. It may be a group.

As the terminal group represented by T1, 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, and an acylamino group having 1 to 10 carbon atoms An alkoxycarbonyl 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, Examples thereof include 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, for example, -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 (meth) Group represented by acryloyloxy group).
T1 is preferably an alkoxy group having 1 to 10 carbon atoms, more preferably an alkoxy group having 1 to 5 carbon atoms, and further preferably a methoxy group for the reason that the effect of the present invention is more excellent. These terminal groups may be further substituted with these groups or a polymerizable group described in JP 2010-244038 A.
The number of atoms in the main chain of T1 is preferably 1 to 20, more preferably 1 to 15, further preferably 1 to 10, and particularly preferably 1 to 7 for the reason that the effect of the present invention is more excellent. When the number of atoms in the main chain of T1 is 20 or less, the degree of orientation of the light absorption anisotropic layer is further improved. Here, the “main chain” in T1 means the longest molecular chain bonded to M1, and hydrogen atoms do not count in the number of atoms in the main chain of T1. For example, when T1 is an n-butyl group, the number of atoms in the main chain is 4, and when T1 is a sec-butyl group, the number of atoms in the main chain is 3.

The content of the repeating unit (4) is preferably 20 to 100% by mass and preferably 30 to 99.9% with respect to 100% by mass of all repeating units possessed by the polymer liquid crystalline compound because the effect of the present invention is more excellent. More preferably, it is 40% to 99.0% by weight.
In the present invention, the content of each repeating unit contained in the polymer liquid crystalline compound is calculated based on the charged amount (mass) of each monomer used to obtain each repeating unit.
The repeating unit (4) may be contained singly or in combination of two or more in the polymer liquid crystalline compound. When the polymer liquid crystalline compound contains two or more repeating units (4), there are advantages such as improved solubility of the polymer liquid crystalline compound in a solvent and easy adjustment of the liquid crystal phase transition temperature. is there. When 2 or more types of repeating units (4) are included, the total amount is preferably within the above range.

When 2 or more types of repeating units (4) are included, the repeating unit (4) containing no polymerizable group in T1 and the repeating unit (4) containing a polymerizable group in T1 may be used in combination. Thereby, the sclerosis | hardenability of a light absorption anisotropic layer improves more.
In this case, the ratio of the repeating unit (4) containing a polymerizable group at T1 to the repeating unit (1) containing no polymerizable group at T1 in the polymer liquid crystalline compound (repeating unit containing a polymerizable group at T1) (4) The repeating unit (4) which does not contain a polymerizable group in / T1 is preferably 0.005 to 4 and more preferably 0.01 to 2.4 in terms of mass ratio. When the mass ratio is 4 or less, there is an advantage that the degree of orientation is excellent. When the mass ratio is 0.05 or more, the curability of the light absorption anisotropic layer is further improved.

(Log P value)
In Formula (4), the difference (| logP ₁ − between the logP values of P1, L1 and SP1 (hereinafter also referred to as “logP ₁ ”) and the logP value of M1 (hereinafter also referred to as “logP ₂ ”). logP ₂ |) is 4 or more, and from the viewpoint of further improving the degree of orientation of the light absorption anisotropic layer, 4.25 or more is preferable, and 4.5 or more is more preferable.
The upper limit of the difference is preferably 15 or less, more preferably 12 or less, and even more preferably 10 or less, from the viewpoint of adjusting the liquid crystal phase transition temperature and suitability for synthesis.
Here, the log P value is an index expressing the hydrophilic and hydrophobic properties of the chemical structure, and is sometimes referred to as a hydrophilic / hydrophobic parameter. The logP value can be calculated using software such as ChemBioDraw Ultra or HSPiP (Ver. 4.1.07). In addition, OECD Guidelines for the Testing of Chemicals, Sections 1, Test No. It can also be obtained experimentally by the method 117 or the like. In the present invention, unless otherwise specified, a value calculated by inputting a structural formula of a compound into HSPiP (Ver. 4.1.07) is adopted as a logP value.

The logP ₁ means the logP values of P1, L1, and SP1, as described above. The “log P value of P1, L1 and SP1” means a logP value of a structure in which P1, L1 and SP1 are integrated, and is not the sum of the logP values of P1, L1 and SP1. Specifically, logP ₁ is calculated by inputting a series of structural formulas from P1 to SP1 in formula (4) to the software.
However, in calculating the logP _1, P1 ~ a series of structural formula to SP1, regarding the portion of the group represented by P1, the structure of the group itself represented by P1 (e.g., the above Expression (P1-A ) To formula (P1-D)) or the structure of a group that can be P1 after polymerizing the monomer used to obtain the repeating unit represented by formula (4). Also good.
Here, a specific example of the latter (group that can be P1) is as follows. If the P1 is obtained by polymerization of (meth) acrylic acid _ester, CH 2 = C ^{(R 1)} - group represented by ^{(R 1} represents a hydrogen atom or a methyl group.) Is. Further, when P1 is obtained by polymerization of ethylene glycol, it is ethylene glycol, and when P1 is obtained by polymerization of propylene glycol, it is propylene glycol. In addition, when P1 is obtained by polycondensation of silanol, a compound represented by silanol (formula Si (R ² ) ₃ (OH). Each of R ² independently represents a hydrogen atom or an alkyl group. , At least one of the plurality of R ² represents an alkyl group.).

logP ₁ as long the difference between logP ₂ described above is four or more, may be lower than the logP _2, may be higher than the logP _2.
Here, the log P value (log P ₂ described above) of a general mesogen group tends to be in the range of 4-6. At this time, when the logP ₁ is lower than the logP _2, the value of logP ₁ is preferably 1 or less, 0 or less is more preferable. On the other hand, when the logP ₁ is higher than the logP _2, the value of logP ₁ is preferably 8 or more, 9 or more is more preferable.
P1 in the formula (1) is obtained by polymerization of (meth) acrylic acid ester, and, if logP ₁ is lower than the logP ₂ is logP value of SP1 in the formula (1) is 0.7 or less Is preferable, and 0.5 or less is more preferable. On the other hand, the equation P1 is in (4) (meth) obtained by polymerization of acrylic acid esters, and, when logP ₁ is higher than the logP _2, the logP value of SP1 in the formula (4), 3. 7 or more is preferable, and 4.2 or more is more preferable.
Examples of the structure having a log P value of 1 or less include an oxyethylene structure and an oxypropylene structure. Examples of the structure having a log P value of 6 or more include a polysiloxane structure and an alkylene fluoride structure.

The polymer liquid crystalline compound containing the repeating unit (4) may further contain a repeating unit represented by the following formula (5) (also referred to as “repeating unit (5)” in this specification). . Thereby, there are advantages such as improved solubility of the polymer liquid crystalline compound in a solvent and easy adjustment of the liquid crystal phase transition temperature.
In formula (5), the difference between the log P values of P2, L2 and SP2 and the log P value of M2 is less than 4. That is, the repeating unit (2) differs from the repeating unit (1) at least in terms of the difference in log P values in the structure.
Note that the definition of “log P values of P2, L2, and SP2” is the same as that of logP ₁ described above, and thus the description thereof is omitted.
When the polymer liquid crystalline compound contains the repeating unit (5), the polymer liquid crystalline compound is a copolymer of the repeating unit (4) and the repeating unit (5), and is a block polymer or an alternating polymer. Any polymer such as a random polymer and a graft polymer may be used.

In formula (5), P2 represents the main chain of the repeating unit, L2 represents a single bond or a divalent linking group, SP2 represents a spacer group, M2 represents a mesogenic group, and T2 represents a terminal group.
Specific examples of P2, L2, SP2, M2, and T2 in Formula (5) are the same as P1, L1, SP1, M1, and T1 in Formula (1), respectively.
Here, T2 in Formula (5) preferably has a polymerizable group from the viewpoint of improving the strength of the light absorption anisotropic layer.

When the repeating unit (5) is contained, the content is preferably 0.5 to 50% by mass, more preferably 1 to 40% by mass with respect to 100% by mass of all repeating units of the polymer liquid crystalline compound.
The repeating unit (5) may be contained singly or in combination of two or more in the polymer liquid crystalline compound. When 2 or more types of repeating units (5) are included, the total amount is preferably within the above range.
In particular, when T2 in the repeating unit (5) has a polymerizable group, the content of the repeating unit (5) in which T2 has a polymerizable group is based on 100% by mass of all repeating units of the polymer liquid crystalline compound. 0.5 to 60% by mass is preferable, and 1 to 40% by mass is more preferable. When the content of the repeating unit (5) in which T2 has a polymerizable group is 0.5% by mass or more, the strength of the light absorption anisotropic layer is further improved. When the content of the repeating unit (5) in which T2 has a polymerizable group is 60% by mass or less, there is an advantage that the degree of orientation is more excellent.

The polymer liquid crystalline compound containing the repeating unit (4) may further contain a repeating unit represented by the following formula (6) (also referred to as “repeating unit (6)” in the present specification). . Thereby, there are advantages such as improved solubility of the polymer liquid crystalline compound in a solvent and easy adjustment of the liquid crystal phase transition temperature.
The repeating unit (6) differs from the repeating unit (4) and the repeating unit (5) in that it does not have at least a mesogenic group.
When the polymer liquid crystalline compound contains the repeating unit (6), the polymer liquid crystalline compound is a copolymer of the repeating unit (4) and the repeating unit (5) (further, the repeating unit (5) And any other polymer such as a block polymer, an alternating polymer, a random polymer, and a graft polymer.

In formula (6), P3 represents the main chain of the repeating unit, L3 represents a single bond or a divalent linking group, SP3 represents a spacer group, and T3 represents a terminal group.
Specific examples of P3, L3, SP3 and T3 in Formula (6) are the same as P1, L1, SP1 and T1 in Formula (4), respectively.
Here, T3 in Formula (6) preferably has a polymerizable group from the viewpoint of improving the strength of the light absorption anisotropic layer.

When the repeating unit (6) is contained, the content is preferably 0.5 to 40% by mass, more preferably 1 to 30% by mass with respect to 100% by mass of all repeating units of the polymer liquid crystalline compound.
The repeating unit (6) may be included singly or in combination of two or more in the polymer liquid crystalline compound. When 2 or more types of repeating units (6) are included, the total amount is preferably within the above range.
In particular, when T3 in the repeating unit (6) has a polymerizable group, the content of the repeating unit (6) in which T3 has a polymerizable group is based on 100% by mass of all repeating units of the polymer liquid crystalline compound. 0.5 to 60% by mass is preferable, and 1 to 40% by mass is more preferable. The intensity | strength of a light absorption anisotropic layer improves more that content of the repeating unit (6) in which T3 has a polymeric group is 0.5 mass% or more. There exists an advantage that it is excellent in orientation degree as content of the repeating unit (6) in which T3 has a polymeric group is 60 mass% or less.

The liquid crystal composition may contain a solvent, an interface improver, a polymerization initiator, and the like in addition to the components described above.

The thickness of the light absorption anisotropic layer is not particularly limited, but is preferably 0.1 to 5.0 μm, and more preferably 0.3 to 1.5 μm. Depending on the concentration of the dichroic substance in the liquid crystal composition, when the film thickness is 0.1 μm or more, a light absorption anisotropic layer with excellent absorbance is obtained, and the film thickness is 5.0 μm or less. A light-absorbing anisotropic layer having excellent transmittance can be obtained.

As an example of the method for producing the light absorption anisotropic layer, a step of forming the coating film by applying the liquid crystalline composition on the first alignment film (hereinafter, also referred to as “coating layer forming step”), And a method of orienting a dichroic substance contained in the coating film (hereinafter also referred to as “orientation step”) in this order.

A coating film formation process is a process of apply | coating the said liquid crystalline composition on a 1st alignment film, and forming a coating film.
The liquid crystalline composition is applied on the first alignment film by using the liquid crystalline composition containing the solvent described above, or by using the liquid crystalline composition as a liquid such as a melt by heating. It becomes easy.
As a coating method of the liquid crystalline composition, a roll coating method, a gravure printing method, a spin coating method, a wire bar coating method, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, a die coating method, a spray method, and A known method such as an ink jet method may be used.

An orientation process is a process of orienting the dichroic substance contained in a coating film. Thereby, a light absorption anisotropic layer is obtained. In the following example, the case where the dichroic material has liquid crystal properties will be described as an example. The liquid crystal compound is aligned in the same manner as the dichroic material.
The alignment step may have a drying process. Components such as a solvent can be removed from the coating film by the drying treatment. The drying treatment may be performed by a method of leaving the coating film at room temperature for a predetermined time (for example, natural drying), or by a method of heating and / or blowing.
Here, the dichroic substance and the liquid crystalline compound contained in the liquid crystalline composition may be aligned by the above-described coating film forming step or drying treatment. For example, in an embodiment in which the liquid crystalline composition is prepared as a coating solution containing a solvent, the coating film is dried and the solvent is removed from the coating film, whereby a coating film having light absorption anisotropy (that is, light Absorption anisotropic layer) is obtained.
When the drying treatment is performed at a temperature equal to or higher than the transition temperature of the dichroic substance contained in the coating film to the liquid crystal phase, the heat treatment described later may not be performed.

The transition temperature of the dichroic substance 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 production suitability.

The alignment step preferably includes heat treatment. Thereby, since the dichroic substance contained in a coating film can be orientated, the coating film after heat processing can be used conveniently as a light absorption anisotropic layer.
The heat treatment is preferably 10 to 250 ° C., more preferably 25 to 190 ° C. from the viewpoint of production suitability. The heating time is preferably 1 to 300 seconds, and more preferably 1 to 60 seconds.

The alignment process may have a cooling process performed after the heat treatment. The cooling treatment is a treatment for cooling the heated coating film to about room temperature (20 to 25 ° C.). Thereby, the orientation of the dichroic substance contained in the coating film can be fixed. The cooling means is not particularly limited and can be carried out by a known method.
The light absorption anisotropic layer can be obtained by the above steps.
In this embodiment, examples of the method for orienting the dichroic substance contained in the coating film include a drying treatment and a heat treatment. However, the method is not limited thereto, and can be performed by a known orientation treatment.

The method for producing a light absorption anisotropic layer may include a step of curing the light absorption anisotropic layer (hereinafter also referred to as “curing step”) after the alignment step. Thereby, the light absorption anisotropic layer excellent in durability is obtained.
The curing step is performed, for example, by heating and / or light irradiation (exposure). Among these, it is preferable that a hardening process is implemented by light irradiation.
As a light source used for curing, various light sources such as infrared rays, visible light, and ultraviolet rays can be used, but ultraviolet rays are preferable. Moreover, you may irradiate an ultraviolet-ray while heating at the time of hardening, and may irradiate an ultraviolet-ray through the filter which permeate | transmits only a specific wavelength.
When the exposure is performed while heating, the heating temperature during the exposure is preferably 25 to 140 ° C., although it depends on the transition temperature of the dichroic substance contained in the light absorption anisotropic layer to the liquid crystal phase. .
The exposure may be performed under a nitrogen atmosphere. When curing of the light absorption anisotropic layer proceeds by radical polymerization, it is preferable to perform exposure in a nitrogen atmosphere because inhibition of polymerization by oxygen is reduced.

(Second peelable support)
A 2nd peelable support body is a member which supports the 2nd alignment film and optically anisotropic layer A which are mentioned later on the surface, and adhere | attaches on the 2nd alignment film surface so that peeling is possible.
As a 2nd peelable support body, the structure illustrated by the 1st peelable support body is mentioned, The suitable range is the same.

(Second alignment film)
A 2nd alignment film is a layer arrange | positioned on a 2nd peelable support body, and is a layer which controls the orientation direction of the liquid crystalline compound in an optically anisotropic layer. The second alignment film is separated from the second peelable support together with the optically anisotropic layer.
Examples of the second alignment film include the embodiments exemplified for the first alignment film, and the preferred ranges thereof are the same.

(Optically anisotropic layer A)
The optically anisotropic layer A is a layer disposed on the second alignment film.
The optically anisotropic layer A is a layer that causes a phase difference in the light that has passed through this layer.

The value of the in-plane retardation of the optically anisotropic layer A is not particularly limited, and the optically anisotropic layer A is preferably a so-called λ / 4 plate.
A λ / 4 plate (a plate having a λ / 4 function) is an optically anisotropic layer having a function of converting linearly polarized light having a specific wavelength into circularly polarized light (or circularly polarized light into linearly polarized light). More specifically, it is a layer whose in-plane retardation at a predetermined wavelength λnm exhibits λ / 4 (or an odd multiple thereof).
In particular, the in-plane retardation Re (550) at a wavelength of 550 nm is preferably 100 to 200 nm, and more preferably 120 to 160 nm.

The optically anisotropic layer A may have a single layer structure or a multilayer structure.
When the optically anisotropic layer A has a multilayer structure, for example, a multilayer optically anisotropic layer including a λ / 4 plate and a λ / 2 plate can be used.

The optically anisotropic layer A has forward wavelength dispersion (in-plane retardation becomes smaller as the measurement wavelength increases) and reverse wavelength dispersion (in-plane retardation becomes larger as the measurement wavelength increases). ), And preferably exhibit reverse wavelength dispersion.

The optically anisotropic layer A is preferably a layer formed using a composition for forming an optically anisotropic layer containing a polymerizable liquid crystalline compound. More specifically, it is a layer formed by orienting a polymerizable liquid crystal compound in a coating film formed by applying a composition for forming an optically anisotropic layer and fixing the state. In this case, it is no longer necessary to exhibit liquid crystallinity after forming a layer.

The polymerizable liquid crystal compound is a liquid crystal compound having a polymerizable group.
The kind of the polymerizable group is not particularly limited, and a polymerizable group capable of radical polymerization or cationic polymerization is preferable.
As the radical polymerizable group, a (meth) acryloyl group is preferable.
Examples of the cationic polymerizable group 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 kind of the liquid crystal compound is not particularly limited, and can be classified into a rod-shaped type (bar-shaped liquid crystal compound) and a disc-shaped type (disc-shaped liquid crystal compound, discotic liquid crystal compound) according to the shape. Furthermore, there are a low molecular type and a high molecular type, respectively. Polymer generally refers to polymers having a degree of polymerization of 100 or more (Polymer Physics / Phase Transition Dynamics, Masao Doi, 2 pages, Iwanami Shoten, 1992). Note that two or more kinds of rod-like liquid crystalline compounds, two or more kinds of disc-like liquid crystalline compounds, or a mixture of a rod-like liquid crystalline compound and a disk-like liquid crystalline compound may be used.

The content of the polymerizable liquid crystal compound in the composition for forming an optically anisotropic layer is not particularly limited, and is preferably 75% by mass or more based on the total solid content in the composition for forming an optically anisotropic layer. The mass% or more is more preferable. An upper limit is not specifically limited, 100 mass% is mentioned.
In addition, the said total solid content intends the component which forms an optically anisotropic layer, and a solvent is not contained.

The composition for forming an optically anisotropic layer may contain other components other than the polymerizable liquid crystalline compound.
A polymerization initiator may be contained in the composition for forming an optically anisotropic layer. The polymerization initiator to be used is selected according to the type of the polymerization reaction, and examples thereof include a thermal polymerization initiator and a photopolymerization initiator.

The composition for forming an optically anisotropic layer may contain a polymerizable monomer. Examples of the polymerizable monomer include radically polymerizable or cationically polymerizable compounds.
The composition for forming an optically anisotropic layer may contain a surfactant from the viewpoint of coating uniformity. As the surfactant, a fluorine-based compound is preferable.
The composition for forming an optically anisotropic layer may contain a solvent, and the solvent is preferably an organic solvent.

Furthermore, the composition for forming an optically anisotropic layer may contain an adhesion improving agent, a plasticizer, a polymer and the like in addition to the above components.

As one aspect of a specific procedure for forming the optically anisotropic layer A, a composition for forming an optically anisotropic layer is applied on the second alignment film, and a coating film is formed on the second alignment film. Then, after aligning the polymerizable liquid crystalline compound in the coating film, a method of forming the optically anisotropic layer A by applying a curing treatment to the coating film can be mentioned.
Examples of the method for applying the composition for forming an optically anisotropic layer on the second alignment film include a wire bar coating method, an extrusion coating method, a direct gravure coating method, a reverse gravure coating method, and a die coating method. .
After applying the composition for forming an optically anisotropic layer on the second alignment film, if necessary, the support coated with the composition for forming an optically anisotropic layer is subjected to a drying treatment, Removal may be performed.

The method for aligning the polymerizable liquid crystalline compound in the coating film (alignment treatment) is not particularly limited, and examples thereof include a method of heating the coating film and a method of drying the coating film at room temperature. In the case of a thermotropic liquid crystalline compound, the liquid crystal phase formed by the alignment treatment can generally be transferred by a change in temperature. In the case of a lyotropic liquid crystalline compound, it can also be transferred by a composition ratio such as the amount of solvent.
The conditions for heating the coating film are not particularly limited, and the heating temperature is preferably 50 to 150 ° C., and the heating time is preferably 10 seconds to 5 minutes.

Next, the coating film in which the polymerizable liquid crystalline compound is oriented is subjected to a curing treatment to form an optically anisotropic layer.
The method of the curing treatment is not particularly limited, and examples thereof include light irradiation treatment and heat treatment, and are preferable to light irradiation. The kind of light at the time of exposure is not specifically limited, Ultraviolet light is preferable.

The first optical layered body may include layers other than the first peelable support, the first alignment film, and the light absorption anisotropic layer described above.
For example, a protective layer may be further disposed on the surface side of the light absorption anisotropic layer opposite to the first alignment film.
An intermediate layer may be disposed between the first peelable support and the first alignment film. When the intermediate layer is disposed, peeling occurs between the first peelable support and the intermediate layer.

Examples of the material for the intermediate layer include methacrylate copolymers, styrene copolymers, polyolefins, polyvinyl alcohols, modified polyvinyl alcohols, poly (N--N) described in paragraph [0022] of JP-A-8-338913. Methylolacrylamide), polyester, polyimide, vinyl acetate copolymer, carboxymethylcellulose, and polycarbonate. A silane coupling agent can also be used.
Among these, water-soluble polymers (for example, poly (N-methylolacrylamide), carboxymethylcellulose, gelatin, polyvinyl alcohol, and modified polyvinyl alcohol) are preferable, gelatin, polyvinyl alcohol, and modified polyvinyl alcohol are more preferable, and modified polyvinyl alcohol is more preferable. .
The saponification degree of polyvinyl alcohol is preferably 70 to 100%, more preferably 80 to 100%. The degree of polymerization of polyvinyl alcohol is preferably 100 to 5,000.

The intermediate layer may be crosslinked using a crosslinking agent.
Examples of the crosslinking agent include aldehydes, N-methylol compounds, dioxane derivatives, compounds that act by activating carboxyl groups, active vinyl compounds, active halogen compounds, isoxazole, and dialdehyde starch.
Specific examples of the crosslinking agent include compounds described in paragraphs [0023] to [0024] in JP-A-2002-062426.
As a crosslinking agent, an aldehyde is preferable and glutaraldehyde is more preferable from the viewpoint of high reaction activity.
Two or more crosslinking agents may be used in combination.
The addition amount of the crosslinking agent is preferably from 0.1 to 20% by mass, more preferably from 0.5 to 15% by mass, based on the polymer. The content of the unreacted crosslinking agent remaining in the intermediate layer is preferably 1.0% by mass or less, and more preferably 0.5% by mass or less, based on the total mass of the intermediate layer.

As a method for forming the intermediate layer, a solution containing the polymer as a forming material, a crosslinking agent, and an additive that is added as necessary is applied on a substrate (for example, a first peelable support). And a method of drying by heating (crosslinking).
The crosslinking reaction may be performed at any time after the solution is applied.
When a water-soluble polymer such as polyvinyl alcohol is used, the solvent is preferably a mixed solvent of an organic solvent (eg, methanol) having a defoaming action and water. The mixing mass ratio of water and methanol (water: methanol) is preferably 0: 100 to 99: 1, and more preferably 0: 100 to 91: 9. If it is the said mixing mass ratio, generation | occurrence | production of a bubble will be suppressed more and the defect of the layer surface of an intermediate | middle layer and also a light absorption anisotropic layer and an optically anisotropic layer will reduce remarkably.

As a method for applying the solution, a spin coating method, a dip coating method, a curtain coating method, an extrusion coating method, a rod coating method, or a roll coating method is preferable, and a rod coating method is more preferable.
The drying temperature is preferably 20 to 110 ° C. From the viewpoint of forming sufficient crosslinks, the temperature is more preferably 60 to 100 ° C, and further preferably 80 to 100 ° C.
The drying time is preferably 1 minute to 36 hours, more preferably 1 to 30 minutes.
The optimum pH of the solution is selected according to the crosslinking agent to be used. For example, when glutaraldehyde is used, it is preferably 4.5 to 5.5.

The second optical layered body may include a layer other than the above-described second peelable support, the second alignment film, and the optically anisotropic layer A.
For example, a protective layer may be further disposed on the surface side of the optically anisotropic layer A opposite to the second alignment film.
An intermediate layer may be disposed between the second peelable support and the second alignment film. When the intermediate layer is disposed, peeling occurs between the second peelable support and the intermediate layer.

(Process procedure)
In this step, the first optical laminate and the first optical laminate are arranged so that the surface on the light absorption anisotropic layer side of the first optical laminate faces the surface on the optical anisotropic layer A side of the second optical laminate. Two optical laminates are laminated, and the first peelable support is peeled off to obtain a laminate X.
In this step, immediately after laminating the first optical laminate and the second optical laminate, the first peelable support may be peeled, or the first optical laminate and the second optical laminate After laminating, after the predetermined time has elapsed, the first peelable support may be peeled from the laminate. In addition, immediately after laminating | stacking a 1st optical laminated body and a 2nd optical laminated body, as a method of peeling a 1st peelable support body, a 1st optical laminated body and a 2nd optical laminated body are made into a roller, for example. There is a method in which the first peelable support is peeled off immediately after the laminated body comes out of the roller after laminating both.

The method for laminating the first optical layered body and the second optical layered body is not particularly limited, and a known method may be mentioned. For example, there may be mentioned a method in which both are bonded by pressure or thermocompression bonding with a heated and / or pressurized roller or flat plate.
Moreover, when laminating (bonding) the first optical laminated body and the second optical laminated body, the first optical laminated body and the second optical laminated body may be laminated via an adhesion layer (bonding layer) as necessary.
The component forming the adhesion layer may be an adhesive or an adhesive. That is, the adhesion layer may be a layer (adhesive layer) formed using an adhesive or a layer (adhesive layer) formed using an adhesive.

When laminating the first optical laminate and the second optical laminate, the polarization axis of the light absorption anisotropic layer in the first optical laminate (axis perpendicular to the absorption axis) and the retardation in the optical anisotropic layer The angle formed with the phase axis is preferably 45 ° ± 10 °.

Further, the method for peeling the first peelable support is not particularly limited, and a known method may be mentioned. For example, a claw is inserted between the first peelable support and the first alignment film to give a trigger for peeling, and the first peelable support is moved away from the first alignment film, and the two are separated. A method is mentioned.

In the first embodiment, the peel force of the first peelable support is smaller than the peel force of the second peelable support described later. When the peelability of the first peelable support is greater than the peelability of the second peelable support, the second peelable support may be peeled when the first peelable support is peeled off. A predetermined optical layered product cannot be obtained.
The peel strength of the first peelable support is the peel force (peel strength) between the first peelable support and the layer adjacent to the first peelable support, and its size is small. It represents that a 1st peelable support body is easy to peel. In addition, as a layer which a 1st peelable support body adjoins, in the form shown in FIG. 1, a 1st orientation film corresponds, for example.
As a method for measuring the peel strength of the first peelable support, the first optical laminate is cut into 150 mm × 25 mm, and the light absorption anisotropic layer side of the obtained sample is pasted on the glass substrate only at the 80 mm × 25 mm portion. The peel strength when the first peelable support is peeled in the 90 ° direction at a speed of 300 mm / min in a 25 ° C. environment is measured with a Tensilon universal material tester (Orientec).

The peel strength of the first peelable support is not particularly limited, but it is often 0.05 to 0.50 N / 25 mm, particularly preferably 0.10 to 0.50 N / 25 mm, and 0.20 to 0.00. 50 N / 25 mm is more preferable.
When the peeling force of the first peelable support is 0.50 N / 25 mm or less, when the first peelable support is peeled by the roll-to-roll method, the sample is hardly broken and the load on the apparatus It is difficult to cause manufacturing failures such as line stoppage. Moreover, when the peeling force of the first peelable support is 0.10 N / 25 mm or more, the first peelable support is hardly peeled off during the conveyance of the long sample, and the handleability is excellent.

In the first embodiment, the peeling force of the first peelable support is between the first peelable support and the first alignment film in the laminate of the first optical laminate and the second optical laminate. It is preferable that it is smaller than the peeling force between each other layers.

According to the above procedure, a laminate X having the first alignment film, the light absorption anisotropic layer, the optical anisotropic layer, the second alignment film, and the second peelable support in this order is obtained.

<Step 1-2>
Step 1-2 includes laminating a surface film on the surface of the laminate X on the first alignment film side, peeling the second peelable support, and forming the surface film, the light absorption anisotropic layer, and the optical anisotropic This is a step of obtaining an optical layered body having the conductive layer A.
More specifically, in this step, as shown in FIG. 3, the first alignment film 14, the light absorption anisotropic layer 16, the optical anisotropic layer A22, the second alignment film 24, and the second peeling. The laminated body X30 which has the property support body 26 in this order, and the surface film 40 which has the hard-coat layer 42 and the base material 44 in this order are prepared. Next, as shown in FIG. 4, the laminate X30 and the surface film 40 are placed so that the surface of the laminate X30 on the first alignment film 14 side and the surface of the surface film 40 on the substrate 44 side face each other. The second peelable support 26 is laminated, and the hard coat layer 42, the base material 44, the first alignment film 14, the light absorption anisotropic layer 16, the optical anisotropic layer A22, and the second alignment are peeled off. An optical laminated body 50 having the film 24 in this order is obtained.
3 and 4, a mode in which the surface film 40 includes the hard coat layer 42 and the base material 44 will be described, but the surface film 40 is not limited to this mode as described later.
Below, each member used at this process is explained in full detail first, and the procedure of a process is explained in full detail after that.

(Surface film)
A surface film is a layer arrange | positioned on a 1st alignment film, and is normally arrange | positioned in the outermost part in the optical laminated body obtained.
As described above, FIGS. 3 and 4 describe an embodiment in which the surface film has a hard coat layer and a substrate.

Materials constituting the substrate include (meth) acrylic resins, polycarbonate resins, polystyrene resins, polyolefin resins, cyclic polyolefin resins, glutaric anhydride resins, glutarimide resins, cellulose resins, polyesters And mixed resins of a plurality of types of resins selected from these resins, and among them, cyclic polyolefin resins, (meth) acrylic resins, or polyester resins are preferable.
The base material may contain an ultraviolet absorber.

(Meth) acrylic resins include methacrylic resins and acrylic resins, as well as (meth) acrylic polymers having a ring structure in the main chain, polymers having a lactone ring, and anhydrides having a succinic anhydride ring. A maleic acid polymer, a polymer having a glutaric anhydride ring, and a glutarimide ring-containing polymer are included.

The hard coat layer is a layer for imparting hardness or scratch resistance to the optical laminate. A hard-coat layer can be formed by apply | coating the composition for hard-coat layer formation on a base material, and making it harden | cure, for example.
Moreover, you may laminate | stack another functional layer on a hard-coat layer for the purpose of adding another function. In addition, by adding fillers or additives to the hard coat layer, the mechanical, electrical, or optical physical performance, and chemical performance such as water and oil repellency are added to the hard coat layer itself. Can be granted.
The hard coat layer is preferably excellent in scratch resistance. Specifically, it is preferable to achieve 3H or higher when a pencil hardness test that is an index of scratch resistance is performed.
The thickness of the hard coat layer is preferably from 0.1 to 6 μm, more preferably from 3 to 6 μm.

The hard coat layer is preferably formed by curing the curable composition. The curable composition is preferably prepared as a liquid coating composition. An example of the curable composition includes a monomer for forming a matrix binder, an oligomer, or a polymer, and an organic solvent.

Knoop hardness of the resulting optical laminate is preferably 235N / mm ² or more, more preferably 270N / mm ² or more, more preferably 270 ~ 330N / mm ^2.

As described above, in the present invention, the surface film is not limited to an embodiment having a substrate and a hard coat layer, and may be, for example, only the substrate or only the hard coat layer.

(Process procedure)
In this step, the surface film is laminated on the surface of the laminate X on the first alignment film side, the second peelable support is peeled off, and the surface film, the light absorption anisotropic layer, and the optical anisotropic layer An optical laminate having A is obtained.
In this step, the second peelable support may be peeled immediately after the laminate X and the surface film are laminated, or after a predetermined time has elapsed after the laminate X and the surface film are laminated. The second peelable support may be peeled from the obtained laminate. In addition, as a method of peeling the second peelable support immediately after laminating the laminate X and the surface film, for example, after laminating the laminate X and the surface film between rollers, The method of peeling a 2nd peelable support body immediately after a laminated body comes out from a roller is mentioned.

The method for laminating the laminate X and the surface film is not particularly limited, and examples thereof include known methods. For example, there may be mentioned a method in which both are bonded by pressure or thermocompression bonding with a heated and / or pressurized roller or flat plate.
Moreover, when laminating | stacking the laminated body X and a surface film (bonding), you may laminate | stack via an adhesion layer (bonding layer) as needed.
The component forming the adhesion layer may be an adhesive or an adhesive. That is, the adhesion layer may be a layer (adhesive layer) formed using an adhesive or a layer (adhesive layer) formed using an adhesive.

Moreover, the method of peeling a 2nd peelable support body is not specifically limited, A well-known method is mentioned. For example, a claw is inserted between the second peelable support and the second alignment film to give a trigger for peeling, and the second peelable support is moved away from the second alignment film while separating the two. A method is mentioned.
As a method for measuring the peel strength of the second peelable support, the second optical laminate is cut into 150 mm × 25 mm, and the optically anisotropic layer A side of the obtained sample is pasted on the glass substrate only at the 80 mm × 25 mm portion. Then, in a 25 ° C. environment, the peel force when the second peelable support is peeled in the 90 ° direction at a speed of 300 mm / min is measured with a Tensilon universal material tester (Orientec).

The peel strength of the second peelable support is not particularly limited, but it is often 0.10 to 4.00 N / 25 mm, particularly preferably 0.10 to 0.50 N / 25 mm, and 0.20 to 0.00. 50 N / 25 mm is more preferable.
When the peeling force of the second peelable support is 0.50 N / 25 mm or less, when the second peelable support is peeled off by the roll-to-roll method, the sample is hardly broken and the load on the apparatus It is hard to cause manufacturing failure such as line stoppage. Moreover, when the peeling force of the second peelable support is 0.10 N / 25 mm or more, the second peelable support is hardly peeled off during the conveyance of the long sample, and the handleability is excellent.

In the first embodiment, the peel strength of the second peelable support is between each layer other than between the second peelable support and the second alignment film in the laminate of the laminate X and the surface film. It is preferably smaller than the peeling force.

In addition, in step 1-1 and step 1-2, various optical laminates may be laminated and a peelable support may be peeled by a so-called roll-to-roll method.

By the above procedure, an optical laminate having a surface film, a light absorption anisotropic layer, and an optical anisotropic layer A in this order is obtained.
When the optically anisotropic layer A is a λ / 4 plate, the obtained optical laminate can function as a so-called circularly polarizing plate.
In addition, the optical laminated body may have layers other than the surface film, the light absorption anisotropic layer, and the optical anisotropic layer A. For example, the optical layered body may have an adhesion layer on the surface side opposite to the light absorption anisotropic layer side of the optical anisotropic layer A. As will be described later, the optical layered body can be fixed on the display element through this adhesion layer.

The optical layered body described above is disposed on the display element, and can provide the display element with a function of preventing external light reflection. In particular, as described above, when the optically anisotropic layer A is a λ / 4 plate, the effect is excellent.
Specifically, as shown in FIG. 5, the display device 60 includes an optical laminate 50 and a display element 62. The viewer visually recognizes the display device 60 from the hard coat layer 42 side.
Hereinafter, the display element 62 will be mainly described in detail.

The type of the display element is not particularly limited, and examples thereof include organic EL (electroluminescence) display elements and image display elements such as liquid crystal display elements, and organic EL display elements are preferably used.
The configuration of the organic EL display element is not particularly limited, and usually includes at least an organic light emitting layer and a pair of electrodes that sandwich the organic light emitting layer.

The production method of the display device is not particularly limited, and examples thereof include a method of laminating the optical laminate and the display element via an adhesion layer.

<< Second Embodiment >>
Hereinafter, a second embodiment of the method for producing an optical layered body of the present invention will be described with reference to the drawings.
The second embodiment of the method for producing an optical layered body of the present invention includes steps 2-1 to 2-3 described later.
Hereinafter, each process is explained in full detail.

<Step 2-1>
Step 2-1 includes the step of the second optical laminate having the second peelable support, the second alignment film, and the optically anisotropic layer A in this order on the optically anisotropic layer A side, The second optical laminate and the third optical laminate so that the surface of the third optical laminate having the peelable support and the optically anisotropic layer B in this order faces the optically anisotropic layer B side. Is laminated, and the second peelable support is peeled off to obtain the laminate Y.
More specifically, in this step, as shown in FIG. 6, the second optical laminate having the second peelable support 26, the second alignment film 24, and the optically anisotropic layer A22 in this order. 20, and a third optical laminate 70 having the optically anisotropic layer B72 and the third peelable support 74 in this order are prepared. Next, as shown in FIG. 7, the surface on the optical anisotropic layer A22 side of the second optical laminate 20 and the surface on the optical anisotropic layer B72 side of the third optical laminate 70 are opposed to each other. The second optical laminate 20 and the third optical laminate 70 are laminated, and the second peelable support 26 is peeled off to obtain a laminate Y80.
Below, each member used at this process is explained in full detail first, and the procedure of a process is explained in full detail after that.
In addition, about each member which comprises a 2nd optical laminated body, it is as having demonstrated in 1st Embodiment, The description is abbreviate | omitted.

(Third peelable support)
A 3rd peelable support body is a member which supports the optically anisotropic layer B mentioned later on the surface, and adhere | attaches on the 2nd alignment film surface so that peeling is possible.
Examples of the third peelable support include the configurations exemplified for the first peelable support, and the preferred ranges thereof are the same.

(Optically anisotropic layer B)
The optically anisotropic layer B is a layer disposed on the third peelable support.
The optically anisotropic layer B is a layer that causes a phase difference in the light that has passed through this layer.

The value of the in-plane retardation of the optically anisotropic layer B is not particularly limited, and the optically anisotropic layer B may be a λ / 4 plate or a λ / 2 plate.
Among these, the optically anisotropic layer B is preferably a positive C plate.
When the optically anisotropic layer B is a positive C plate, the in-plane retardation at a wavelength of 550 nm is preferably 0 to 5 nm.
Further, the value of retardation in the thickness direction of the optically anisotropic layer B is not particularly limited. When the optically anisotropic layer B is a C plate, the retardation in the thickness direction at a wavelength of 550 nm is preferably −300 to 0 nm. -200 to -60 nm is more preferable.

There are two types of C plates, a positive C plate (positive C plate) and a negative C plate (negative C plate). The positive C plate satisfies the relationship of the formula (C1). The relationship of Formula (C2) is satisfied. The positive C plate shows a negative value for Rth, and the negative C plate shows a positive value for Rth.
Formula (C1) nz> nx≈ny
Formula (C2) nz <nx≈ny
The above “≈” includes not only the case where both are completely the same, but also the case where both are substantially the same. “Substantially the same” means that, for example, (nx−ny) × d (where d is the thickness of the film) is included in “nx≈ny” when 0 to 10 nm, preferably 0 to 5 nm. It is.

The optically anisotropic layer B may have a single layer structure or a multilayer structure.

The optically anisotropic layer B is preferably a layer formed using an optically anisotropic layer forming composition containing a polymerizable liquid crystalline compound. More specifically, it is a layer formed by orienting a polymerizable liquid crystal compound in a coating film formed by applying a composition for forming an optically anisotropic layer and fixing the state. In this case, it is no longer necessary to exhibit liquid crystallinity after forming a layer.
As each component (polymerizable liquid crystalline compound, polymerization initiator, etc.) that can be contained in the composition for forming an optically anisotropic layer, the composition for forming an optically anisotropic layer used for forming the optically anisotropic layer A is used. It is the same as the component which can be contained in a thing, The suitable aspect is also the same.
Moreover, the manufacturing method of the optically anisotropic layer B includes the same procedure as the manufacturing method of the optically anisotropic layer A.

The third optical layered body may include layers other than the third peelable support and the optically anisotropic layer B described above.
For example, a third alignment film may be included between the third peelable support and the optically anisotropic layer B. Examples of the third alignment film include the embodiments exemplified for the first alignment film, and the preferred ranges thereof are the same.
Further, for example, a protective layer may be further disposed on the surface side of the optically anisotropic layer B opposite to the third peelable support.

(Process procedure)
In this step, the second optical laminate and the second optical laminate are arranged so that the surface on the optical anisotropic layer A side of the second optical laminate and the surface on the optical anisotropic layer B side of the third optical laminate face each other. Three optical laminates are laminated, and the second peelable support is peeled off to obtain a laminate Y.
In this step, the second peelable support may be peeled immediately after the second optical laminate and the third optical laminate are laminated, or the second optical laminate and the third optical laminate After laminating, the second peelable support may be peeled from the obtained laminate after a predetermined time has elapsed. In addition, immediately after laminating | stacking a 2nd optical laminated body and a 3rd optical laminated body, as a method of peeling a 2nd peelable support body, a 2nd optical laminated body and a 3rd optical laminated body are made into a roller, for example. There is a method of peeling the second peelable support immediately after the laminated body comes out from the roller after laminating both in between.

The method for laminating the second optical laminated body and the third optical laminated body is not particularly limited, and a known method can be mentioned. For example, there may be mentioned a method in which both are bonded by pressure or thermocompression bonding with a heated and / or pressurized roller or flat plate.
Moreover, when laminating (bonding) the second optical laminated body and the third optical laminated body, they may be laminated via an adhesion layer (bonding layer) as necessary.
The component forming the adhesion layer may be an adhesive or an adhesive. That is, the adhesion layer may be a layer (adhesive layer) formed using an adhesive or a layer (adhesive layer) formed using an adhesive.

Further, the method for peeling the second peelable support is not particularly limited, and a known method can be mentioned. For example, a claw is inserted between the second peelable support and the second alignment film to give a trigger for peeling, and the second peelable support is moved away from the second alignment film, and the two are separated. A method is mentioned.

In the second embodiment, the peel force of the second peelable support is smaller than the peel force of the third peelable support described later. When the peelability of the second peelable support is greater than the peelability of the third peelable support, the third peelable support may be peeled when the second peelable support is peeled off. A predetermined optical layered product cannot be obtained.
The peel strength of the second peelable support is the peel force (peel strength) between the second peelable support and the layer adjacent to the second peelable support, and its size is small. It represents that the second peelable support is easily peeled. In addition, as a layer which a 2nd peelable support body adjoins, in the form shown in FIG. 6, for example, a 2nd alignment film corresponds.
The measuring method of the peeling force of the second peelable support is as described above.
Further, the range of the peeling force of the second peelable support is preferably the range described in the first embodiment.

In the second embodiment, the peel strength of the second peelable support is the second peelable support in the laminate of the second optical laminate and the third optical laminate and the second alignment film. It is preferable that it is smaller than the peeling force between each layer other than between.

According to the above procedure, a laminate Y having the second alignment film, the optically anisotropic layer A, the optical laminate B, and the third peelable support in this order is obtained.

<Step 2-2>
Step 2-2 is a step of forming the first optical laminated body having the surface of the laminated body Y on the second alignment film side, the first peelable support, the first alignment film, and the light absorption anisotropic layer in this order. In this step, the laminated body Y and the first optical laminated body are laminated so that the surface on the light absorption anisotropic layer side faces, and the first peelable support is peeled off to obtain the laminated body Z.
More specifically, in this step, as shown in FIG. 8, the first optical laminate having the first peelable support 12, the first alignment film 14, and the light absorption anisotropic layer 16 in this order. A laminate Y80 having the body 10, the second alignment film 24, the optically anisotropic layer A22, the optically anisotropic layer B72, and the third peelable support 74 in this order is prepared. Next, as shown in FIG. 9, the first optical laminate 10 is arranged such that the surface on the light absorption anisotropic layer 16 side of the first optical laminate 10 and the surface on the second alignment film 24 side of the laminate Y80 face each other. The optical laminated body 10 and the laminated body Y80 are laminated | stacked, the 1st peelable support body 12 is peeled, and the laminated body Y90 is obtained.
About each member which comprises the 1st optical laminated body used at this process, it is as having demonstrated in 1st Embodiment, The description is abbreviate | omitted.

(Process procedure)
In this step, the laminated body Y and the first optical laminated body are arranged so that the surface on the second alignment film side of the laminated body Y faces the surface on the light absorption anisotropic layer side of the first optical laminated body. It laminates | stacks and the 1st peelable support body is peeled, and the laminated body Z is obtained.
In this step, immediately after the laminate Y and the first optical laminate are laminated, the first peelable support may be peeled off, or the laminate Y and the first optical laminate are laminated. Thereafter, the first peelable support may be peeled from the obtained laminate after a predetermined time has elapsed. In addition, immediately after laminating the laminated body Y and the 1st optical laminated body, as a method of peeling a 1st peelable support body, let the laminated body Y and a 1st optical laminated body pass between rollers, for example. After laminating both, the method of peeling a 1st peelable support body immediately after a laminated body comes out from a roller is mentioned.

The method for laminating the laminate Y and the first optical laminate is not particularly limited, and a known method may be mentioned. For example, there may be mentioned a method in which both are bonded by pressure or thermocompression bonding with a heated and / or pressurized roller or flat plate.
Further, when the laminated body Y and the first optical laminated body are laminated (bonded), they may be laminated through an adhesion layer (bonding layer) as necessary.
The component forming the adhesion layer may be an adhesive or an adhesive. That is, the adhesion layer may be a layer (adhesive layer) formed using an adhesive or a layer (adhesive layer) formed using an adhesive.

Moreover, the method of peeling a 1st peelable support body is not specifically limited, A well-known method is mentioned. For example, a claw is inserted between the first peelable support and the first alignment film to give a trigger for peeling, and the first peelable support is moved away from the first alignment film, and the two are separated. A method is mentioned.
In the second embodiment, the peel force of the first peelable support is smaller than the peel force of the third peelable support described later. When the peel strength of the first peelable support is greater than the peel strength of the third peelable support, the third peelable support may be peeled when the first peelable support is peeled off. A predetermined optical layered product cannot be obtained.
The peel strength of the first peelable support is the peel force (peel strength) between the first peelable support and the layer adjacent to the first peelable support, and its size is small. It represents that a 1st peelable support body is easy to peel. In addition, as a layer which a 2nd peelable support body adjoins, in the form shown in FIG. 8, for example, a 1st alignment film corresponds.
The measuring method of the peeling force of the first peelable support is as described above.
Further, the range of the peel force of the first peelable support is preferably the range described in the first embodiment.

In the second embodiment, the peel strength of the first peelable support is other than between the first peelable support and the first alignment film in the laminate of the laminate Y and the first optical laminate. It is preferable that it is smaller than the peeling force between these layers.

By the above procedure, a laminate Z having the first alignment film, the light absorption anisotropic layer, the second alignment film, the optical anisotropic layer A, the optical laminate B, and the third peelable support in this order is obtained. It is done.

<Step 2-3>
Step 2-3 is a step of laminating a surface film on the surface of the laminated body Z on the first alignment film side, peeling the third peelable support, and forming the surface film, the light absorption anisotropic layer, the optical anisotropic layer In this step, an optical laminate having A and an optically anisotropic layer B is obtained.
More specifically, in this step, as shown in FIG. 10, the first alignment film 14, the light absorption anisotropic layer 16, the second alignment film 24, the optical anisotropic layer A22, the optical anisotropic layer A laminate Z90 having B72 and a third peelable support 74 in this order, and a surface film 40 having the hard coat layer 42 and the base material 44 in this order are prepared. Next, as shown in FIG. 11, the laminate Y90 and the surface film 40 are so arranged that the surface of the laminate Y90 on the first alignment film 14 side and the surface of the surface film 40 on the substrate 44 side face each other. The third peelable support 74 is laminated, and the hard coat layer 42, the base material 44, the first alignment film 14, the light absorption anisotropic layer 16, the second alignment film 24, and the optical anisotropic layer A22 are peeled off. And the optical laminated body 100 which has the optically anisotropic layer B72 in this order is obtained.
10 and 11, the form in which the surface film 40 has the hard coat layer 42 and the base material 44 has been described. However, as described above, the surface film 40 is not limited to this form.
About each member which comprises the surface film used at this process, it is as having demonstrated in 1st Embodiment, The description is abbreviate | omitted.

(Process procedure)
In this step, a surface film is laminated on the surface of the laminate Z on the first alignment film side, the third peelable support is peeled off, and the surface film, the light absorption anisotropic layer, the optical anisotropic layer A, And the optical laminated body which has the optically anisotropic layer B is obtained.
In this step, the third peelable support may be peeled immediately after the laminate Z and the surface film are laminated, or after a predetermined time has elapsed after the laminate Z and the surface film are laminated. The third peelable support may be peeled from the obtained laminate. In addition, immediately after laminating the laminate Z and the surface film, as a method of peeling the third peelable support, for example, after laminating the laminate Z and the surface film between rollers, The method of peeling a 3rd peelable support body immediately after a laminated body comes out from a roller is mentioned.

The method for laminating the laminate Z and the surface film is not particularly limited, and a known method may be mentioned. For example, there may be mentioned a method in which both are bonded by pressure or thermocompression bonding with a heated and / or pressurized roller or flat plate.
Moreover, when laminating the laminated body Z and the surface film (bonding), you may laminate | stack via an adhesion layer (bonding layer) as needed.
The component forming the adhesion layer may be an adhesive or an adhesive. That is, the adhesion layer may be a layer (adhesive layer) formed using an adhesive or a layer (adhesive layer) formed using an adhesive.

Further, the method for peeling the third peelable support is not particularly limited, and a known method can be mentioned. For example, a claw is inserted between the third peelable support and the optically anisotropic layer B to provide a trigger for peeling, and while moving the third peelable support away from the optically anisotropic layer B, A method for separating the two is mentioned.

As a method for measuring the peel strength of the third peelable support, the third optical laminate is cut into 150 mm × 25 mm, and the optically anisotropic layer B side of the obtained sample is pasted on the glass substrate only at the 80 mm × 25 mm portion. Then, in a 25 ° C. environment, the peeling force when peeling the third peelable support in the 90 ° direction at a speed of 300 mm / min is measured with a Tensilon universal material testing machine (Orientec Co., Ltd.).
The peel strength of the third peelable support is not particularly limited, but it is often 0.10 to 4.00 N / 25 mm, particularly preferably 0.10 to 0.50 N / 25 mm, and 0.20 to 0.00. 50 N / 25 mm is more preferable.
When the peeling force of the third peelable support is 0.50 N / 25 mm or less, when the third peelable support is peeled off by the roll-to-roll method, the sample is hardly broken and the load on the apparatus It is hard to cause manufacturing failure such as line stoppage. Further, when the peeling force of the third peelable support is 0.10 N / 25 mm or more, the third peelable support is hardly peeled off during the conveyance of the long sample, and the handleability is excellent.

In addition, in 2nd Embodiment, the peeling force of a 3rd peelable support body is each other than between the 3rd peelable support body and optically anisotropic layer B in the laminated body of the laminated body Z and a surface film. It is preferable that it is smaller than the peeling force between layers.

In steps 2-1 to 2-3, various optical laminates may be laminated and the peelable support may be peeled off by a so-called roll-to-roll method.

By the above procedure, an optical laminate having a surface film, a light absorption anisotropic layer, an optical anisotropic layer A, and an optical anisotropic layer B in this order is obtained.
When the optically anisotropic layer A is a λ / 4 plate and the optically anisotropic layer B is a positive C plate, the obtained optical laminate functions more effectively as a so-called circularly polarizing plate.
The optical layered body may have a layer other than the surface film, the light absorption anisotropic layer, the optical layered body A, and the optical anisotropic layer B. For example, the optical layered body may have an adhesion layer on the surface side of the optically anisotropic layer B opposite to the optically anisotropic layer A side. As will be described later, the optical layered body can be fixed on the display element through this adhesion layer.

The optical layered body described above is disposed on the display element, and can provide the display element with a function of preventing external light reflection. In particular, as described above, when the optically anisotropic layer A is a λ / 4 plate and the optically anisotropic layer B is a positive C plate, the effect is excellent.
Specifically, as shown in FIG. 12, the display device 110 includes an optical laminate 100 and a display element 62. The display device 110 is visually recognized by the observer from the hard coat layer 42 side.
The configuration of the display element is as described in the first embodiment.

Hereinafter, the present invention will be described in more detail based on examples. The materials, amounts used, ratios, processing contents, and processing procedures shown in the following examples can be changed as appropriate 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.

<Evaluation of peel strength>
The peel force of the peelable support in each optical laminate shown in the latter part was measured according to the following procedure.
The optical laminate was cut into 150 mm × 25 mm, and the light absorption anisotropic layer side or the optical anisotropic layer of the obtained sample was bonded to the glass substrate only at the 80 mm × 25 mm portion. Next, in a 25 ° C. environment, the peel force when the peelable support in the sample was peeled in the 90 ° direction at a speed of 300 mm / min was measured with a Tensilon universal material tester (Orientec). .

<Preparation of Samples 101 to 107>
(Preparation of sample 101)
Using a cellulose acylate film 11 (film 11) (TG40, manufactured by Fuji Film Co., Ltd.) having a thickness of 40 μm as a transparent support, the intermediate layer forming composition 1 is continuously applied onto the transparent support with a # 8 wire bar. did. Then, the intermediate support (thickness: 0.8 micrometer) was formed on the transparent support body by drying the transparent support body with which the composition 1 for intermediate | middle layer formation was apply | coated with 100 degreeC warm air for 2 minutes.
The solid content concentration of the modified polyvinyl alcohol in the intermediate layer forming composition 1 was 4% by mass.
Moreover, the film 11 corresponds to a peelable support.
―――――――――――――――――――――――――
Intermediate layer forming composition 1
―――――――――――――――――――――――――
The following modified polyvinyl alcohol water 70 parts by mass Methanol 30 parts by mass ―――――――――――――――――――――――――

Modified polyvinyl alcohol

To photoalignment material E-1 (1 part by mass) having the following structure, butoxyethanol (41.6 parts by mass), dipropylene glycol monomethyl (41.6 parts by mass), and pure water (15.8 parts by mass) were added. In addition, the obtained solution was pressure filtered through a 0.45 μm membrane filter to prepare composition 1 for forming a photo-alignment film.
Subsequently, the obtained composition 1 for photo-alignment film formation was apply | coated on the said intermediate | middle layer 1, and it dried at 60 degreeC for 1 minute. Thereafter, the obtained coating film was irradiated with linearly polarized ultraviolet light (illuminance: 4.5 mW, irradiation amount: 400 mJ / cm ² ) using a polarized ultraviolet light exposure apparatus to obtain an alignment film 11.

On the resulting alignment film 11, the following liquid crystalline composition (light absorption anisotropic layer forming composition) 11 was continuously applied with a # 4 wire bar to obtain a coating film. Next, the coating film was heated at 140 ° C. for 90 seconds and cooled to room temperature (23 ° C.). Next, the obtained coating film was heated at 80 ° C. for 60 seconds and cooled again to room temperature. Thereafter, the obtained coating film was irradiated for 60 seconds under an irradiation condition of illuminance of 28 mW / cm ² using a high-pressure mercury lamp to produce a light absorption anisotropic layer 11 on the alignment film 11, and a sample 101 was prepared. Obtained.
――――――――――――――――――――――――――――――――
Liquid crystalline composition 11
――――――――――――――――――――――――――――――――
-7.1 parts by weight of the following yellow azo dye Y-1-9.1 parts by weight of the following cyanazo dye D-1-101.1 parts by weight of the following polymer liquid crystalline compound P-1-Polymerization initiator IRGACURE819 (manufactured by BASF) 1.0 part by mass, the following surface modification agent F-1 0.3 part by mass, cyclopentanone 617.0 parts by mass, tetrahydrofuran 264.4 parts by mass -------- ――――――――――――――――

(Preparation of sample 102)
Instead of the liquid crystal composition P-1 of the liquid crystal composition 11, a liquid crystal composition 12 containing an equal mass of the following polymer liquid crystal compound P-2 was used instead of the liquid crystal composition 11. Except for the above, a sample 102 having the light absorption anisotropic layer 12 was obtained according to the same procedure as in (Preparation of Sample 101).

Polymer liquid crystalline compound P-2

(Preparation of sample 103)
A liquid crystal composition 13 containing an equal mass of the following yellow azo dye Y-2 instead of the yellow azo dye Y-1 in the liquid crystal composition 12 was used in place of the liquid crystal composition 11 ( The sample 103 having the light absorption anisotropic layer 13 was obtained according to the same procedure as in the preparation of the sample 101).

Yellow azo dye Y-2

(Preparation of sample 104)
Except that the liquid crystalline composition 14 containing an equal mass of the following cyanazo dye D-2 in place of the cyanazo dye D-1 in the liquid crystalline composition 13 was used in place of the liquid crystalline composition 11 (Sample 101 The sample 104 having the light-absorbing anisotropic layer 14 was obtained according to the same procedure as in (Preparation)

Cyanazo dye D-2

(Preparation of sample 105)
Instead of the liquid crystal composition P-1 in the liquid crystal composition 14, a liquid crystal composition 15 containing an equal mass of the following polymer liquid crystal compound P-3 was used instead of the liquid crystal composition 11. Except for the above, a sample 105 having the light absorption anisotropic layer 15 was obtained according to the same procedure as in (Preparation of Sample 101).

Polymer liquid crystalline compound P-3

(Preparation of sample 106)
The following photo-alignment polymer E-2 (2 parts by mass) and o-xylene (98 parts by mass) were mixed and stirred at 80 ° C. for 1 hour to obtain an alignment film forming composition 12.

Photo-alignment polymer E-2

The alignment film-forming composition 12 was applied on the intermediate layer 1 obtained in the (preparation of the sample 101). After the transparent support coated with the alignment film forming composition 12 was dried at 100 ° C. for 2 minutes, the obtained coating film was irradiated once with polarized ultraviolet light (20 mJ / cm ² , wavelength 313 nm standard) and aligned. A film 12 was produced.
A sample 106 was obtained on the obtained alignment film 12 by using the liquid crystalline composition 14 used in (Preparation of Sample 104) by the same method as the preparation procedure of Sample 104.

(Preparation of sample 107)
Lube et al. Rec1. Trav. Chim. A liquid crystalline compound M-1 represented by the following formula was synthesized by the method described in Pays-Bas, 115, 321-328 (1996).

Next, a liquid crystalline compound M-2 represented by the following formula was synthesized with reference to a synthesis method of the liquid crystalline compound M-1 represented by the above formula.

The following components were mixed and stirred at 80 ° C. for 1 hour to prepare liquid crystal composition 17.

―――――――――――――――――――――――――――――――
Liquid crystalline composition 17
―――――――――――――――――――――――――――――――
Liquid crystalline compound M-1 50 parts by mass Liquid crystalline compound M-2 50 parts by mass Azo dye D-3 2.5 parts by mass Azo dye D-4 2.5 parts by mass Azo dye D-5 5 parts by mass polymerization initiator Irgacure 369 (manufactured by BASF) 6 parts by mass polyacrylate compound (BYK-361N; manufactured by BYK-Chemie) 1.2 parts by mass O-xylene 250 parts by mass ――――――――――――――――――――――

A liquid crystal composition 17 was applied on the alignment film 12 produced during (Production of Sample 106) so as to have a film thickness of 1.8 μm to form a coating film. Thereafter, the laminate on which the coating film is disposed is heat-dried at 110 ° C. for 2 minutes, and then irradiated with an exposure dose of 1000 mJ / cm ² (based on a wavelength of 365 nm) using an ultraviolet irradiation device, and the light absorption anisotropic layer 17. A sample 107 having was obtained.

<Evaluation of orientation>
With a linear polarizer inserted on the light source side of an optical microscope (product name “ECLIPSE E600 POL” manufactured by Nikon Corporation), each of the samples 101 to 107 including the light absorption anisotropic layer is set on the sample stage and Using a channel spectrometer (product name “QE65000” manufactured by Ocean Optics, Inc.), the absorbance of the light absorption anisotropic layer in the wavelength region of 400 to 700 nm was measured, and the degree of orientation was calculated by the following equation. The results are shown in Table 1 below.
Orientation degree: S = [(Az0 / Ay0) -1] / [(Az0 / Ay0) +2]
Az0: Absorbance with respect to polarized light in the absorption axis direction of the light absorption anisotropic layer Ay0: Absorbance with respect to polarization in the polarization axis direction of the light absorption anisotropic layer

From the results shown in Table 1, the high molecular liquid crystalline compounds P-1 and P-2 (both 4.4) in which the difference in the log P value of the high molecular liquid crystalline compound represented by the formula (4) is 4 or more have a log P value. The orientation was superior to that of the polymer liquid crystalline compound P-3 (0.89) having a difference of less than 1.

<Production of first optical laminate>
As the first optical laminate, optical laminates 111 to 112 were produced according to the following procedure.

(Preparation of optical laminate 111)
On the light absorption anisotropic layer 14 in the sample 104, the following protective layer composition 1 was continuously applied with a # 2 wire bar and dried at 60 ° C. for 5 minutes.
Thereafter, the sample 104 on which the coating film is disposed is irradiated for 60 seconds under an irradiation condition of illuminance of 28 mW / cm ² using a high-pressure mercury lamp, the coating film is cured, and a protective layer is formed on the light absorption anisotropic layer 14. The optical laminated body 111 in which 1 was formed was produced.

――――――――――――――――――――――――――――――――
Protective layer composition 1
――――――――――――――――――――――――――――――――
The following hydrophilic monomer HM-1 29 parts by mass Polymerization initiator IRGACURE819 (manufactured by BASF) 1 part by mass Ethanol 70 parts by mass ――――――――――――――――――――――― ――――――――

Hydrophilic monomer HM-1

(Preparation of optical laminate 112)
In the optical layered body 111, the film 12 and the intermediate layer were formed in the same manner as in (Preparation of the optical layered body 111) except that a PET film (film 12) having a film thickness of 50 μm was used instead of the cellulose acylate film 11. 1, an optical laminate 112 including the alignment film 11, the light absorption anisotropic layer 14, and the protective layer 1 was obtained.
The film 12 corresponds to a peelable support.

<Preparation of second optical laminate>
As the second optical laminate, optical laminates 201 to 204 were produced according to the following procedure.

(Preparation of optical laminate 201)
An optically anisotropic layer forming composition 21 having the following composition was prepared.
――――――――――――――――――――――――――――――――
Optically anisotropic layer forming composition 21
――――――――――――――――――――――――――――――――
-42.00 parts by mass of the following liquid crystalline compound L-3-42.00 parts by mass of the following liquid crystalline compound L-4-16.00 parts by mass of the following polymerizable compound A-1-6.00 parts by mass of the following low molecular compound B2 -0.50 parts by mass of the following polymerization initiator S-1 (oxime type)-0.20 parts by mass of the following leveling agent G-1-2.00 parts by mass of Hisolv MTEM (manufactured by Toho Chemical Industry Co., Ltd.)-NK ester A-200 (Manufactured by Shin-Nakamura Chemical Co., Ltd.) 1.00 parts by mass, methyl ethyl ketone 424.8 parts by mass ―――――――――――――――――――――――――――――― -

The groups adjacent to the acryloyloxy groups of the following liquid crystal compounds L-3 and L-4 represent propylene groups (groups in which a methyl group is substituted with an ethylene group), and the following liquid crystal compounds L-3 and L-4 Represents a mixture of positional isomers having different methyl group positions.

The following composition was put into a mixing tank and stirred to prepare a cellulose acetate solution used as a core layer cellulose acylate dope.
───────────────────────────────
Core layer cellulose acylate dope───────────────────────────────
-100 parts by weight of cellulose acetate having an acetyl substitution degree of 2.88-11 parts by weight of polyester compound B described in Examples of JP-A-2015-227955-430 parts by weight of methylene chloride (first solvent)-Methanol (second Solvent) 64 parts by mass ───────────────────────────────

10 parts by mass of the following matting agent solution was added to 90 parts by mass of the core layer cellulose acylate dope to prepare a cellulose acetate solution used as an outer layer cellulose acylate dope.
────────────────────────────────
Matting agent solution ────────────────────────────────
Silica particles having an average particle size of 20 nm (AEROSIL R972, manufactured by Nippon Aerosil Co., Ltd.) 2 parts by mass. 76 parts by mass of methylene chloride (first solvent). 11 parts by mass of methanol (second solvent). Rate dope 1 part by mass────────────────────────────────

The core layer cellulose acylate dope and the outer layer cellulose acylate dope are filtered through a filter paper having an average pore size of 34 μm and a sintered metal filter having an average pore size of 10 μm, and then the core layer cellulose acylate dope and the outer layer cellulose acylate on both sides thereof Three layers of dope were cast simultaneously from a casting port using a band casting machine.
Next, the film was peeled off in a state where the solvent content was about 20% by mass, both ends in the width direction of the film were fixed with tenter clips, and dried while being stretched in the transverse direction at a stretch ratio of 1.1 times.
Thereafter, the obtained film was conveyed between rolls of a heat treatment apparatus and further dried to produce an optical film having a thickness of 20 μm, which was designated as a cellulose acylate film 21 (hereinafter also referred to as film 21). The in-plane retardation of the obtained cellulose acylate film 21 at a wavelength of 550 nm was 0 nm.
The film 21 corresponds to a peelable support.

The following alignment film forming composition 21 was applied to one surface of the produced cellulose acylate film 21 with a bar coater, and the obtained coating film was dried at 110 ° C. for 2 minutes. Thereafter, the coating film was rubbed to form an alignment film 21.

―――――――――――――――――――――――――――――――――
Alignment film forming composition 21
―――――――――――――――――――――――――――――――――
・ Modified vinyl alcohol (refer to the following formula (PVA-1)) 2.00 parts by mass, water 74.08 parts by mass, methanol 23.86 parts by mass, photopolymerization initiator (IRGACURE2959, manufactured by BASF) 0.06 parts by mass ―――――――――――――――――――――――――――――――――

Next, on the alignment film 21, the optically anisotropic layer forming composition 21 prepared earlier was applied with a bar coater to form a coating film. The obtained coating film was heated to 110 ° C. and then cooled to 60 ° C. to stabilize the orientation.
Thereafter, the obtained coating film was kept at 60 ° C., and the orientation was fixed by irradiation with ultraviolet rays (500 mJ / cm ² , using an ultra-high pressure mercury lamp) in a nitrogen atmosphere (oxygen concentration 100 ppm), and an optical difference of 2.3 μm in thickness was obtained. An isotropic layer was formed to produce an optical laminate 201. The in-plane retardation at a wavelength of 550 nm of the optically anisotropic layer in the obtained optical laminate 201 was 140 nm. The slow axis direction of the obtained optically anisotropic layer was aligned parallel to the rubbing direction.

(Production of optical laminates 202 to 204)
Similar to (Preparation of optical laminate 201), except that cellulose acylate films 22 to 24 (hereinafter also referred to as films 22 to 24) prepared by the procedure described below are used instead of cellulose acylate film 21. Optical laminates 202 to 204 were prepared according to the procedure described above.
The films 22 to 24 correspond to a peelable support.

(Preparation of cellulose acylate film 22)
After passing the long film of the cellulose acylate film 21 through a dielectric heating roll having a temperature of 60 ° C. and raising the film surface temperature to 40 ° C., an alkali solution 1 having the composition shown below is applied to one side of the film by a bar coater. Was applied at a coating amount of 14 ml / m ² . Thereafter, the obtained film was heated to 110 ° C. and conveyed under a steam far-infrared heater manufactured by Noritake Company Limited for 10 seconds. Subsequently, using a bar coater, 3 ml / m ^{2 of} pure water was applied to the obtained film. Next, the obtained film was washed with a fountain coater and drained with an air knife three times, and then the obtained film was transported to a drying zone at 70 ° C. for 10 seconds to be dried. A rate film 22 was produced.
────────────────────────────────
Alkaline solution 1
────────────────────────────────
Potassium hydroxide 4.7 parts by weight Water 15.8 parts by weight Isopropanol 63.7 parts by weight Fluorine-containing surfactant SF-1
(C ₁₄ H ₂₉ O (CH ₂ CH ₂ O) ₂₀ H) 1.0 part by mass propylene glycol 14.8 parts by mass ────────────────────── ──────────

(Preparation of cellulose acylate films 23 to 24)
In the cellulose acylate film 22, the potassium hydroxide concentration of the alkaline solution 1 was adjusted to obtain cellulose acylate films 23-24.

<Preparation of surface film 41>
Polyethylene terephthalate (hereinafter also referred to as PET 1) (90 parts by mass) described in JP-A-2014-206725 and a dried ultraviolet absorber (2,2 ′-(1,4-phenylene) bis (4H −3,1-benzoxazinon-4-one)) (10 parts by mass) was mixed, and using a kneading extruder, polyethylene terephthalate containing an ultraviolet absorber (hereinafter also referred to as PET2) was obtained.
After drying PET1 (90 parts by mass) and PET2 (10 parts by mass) to a moisture content of 20 ppm or less, they are put into the hopper 1 of a single-screw kneading extruder 1 having a diameter of 50 mm, and the extruder 1 is heated to 300 ° C. Melted. The molten resin extruded from the die was extruded onto a cooling cast drum set at a temperature of 25 ° C. and peeled off using a peeling roll to obtain an unstretched polyester film.
The unstretched polyester film was guided to a tenter (lateral stretching machine), and stretched 4.7 times in the width direction at 95 ° C. while holding the end of the film with a clip. Next, heat setting treatment was performed while controlling the film surface temperature of the obtained film at 180 ° C. Furthermore, the obtained film was relaxed at 170 ° C. and 2% in the width direction and cooled to obtain a polyester-based transparent base material 41 having a thickness of 40 μm.

The following hard coat layer forming composition 1 was prepared as a hard coat layer forming coating solution.

The one surface of the transparent substrate 41 produced above was previously corona-treated, and then the hard coat layer forming composition 1 was applied. Next, the obtained coating film was dried at 100 ° C. for 60 seconds, irradiated with ultraviolet rays at 1.5 kW and 300 mJ under a condition of 0.1% or less of nitrogen to cure the coating film, and a hard coat layer having a thickness of 5 μm. The surface film 41 which consists of the transparent base material 41 and a hard-coat layer was obtained.

<Example 3: Production of circularly polarizing plate 214>
Long samples of the optical laminate 111, the optical laminate 204, and the surface film 41 were prepared, and the following roll-to-roll lamination was performed.
Immediately after bonding, the film 11 in the optical layered body 111 is peeled off while bonding the surface of the optical layered body 204 on the optically anisotropic layer side and the surface of the protective layer of the optical layered body 111 with an adhesive. Thus, a laminate X was obtained.
Next, the film in the optical laminate 204 is bonded immediately after bonding the surface of the alignment film 11 in the laminate X and the surface of the transparent substrate 41 in the surface film 41 with an adhesive. 24 was peeled off to obtain a circularly polarizing plate 214.

<Examples 1, 2, and 4: Production of circularly polarizing plates 212, 213, and 215>
Except that each of the first optical laminate and the second optical laminate shown in Table 3 was used, and the peelable support contained in each optical laminate was peeled off, the same as (preparation of circularly polarizing plate 214). According to the procedure, circularly polarizing plates 212 to 213 and a circularly polarizing plate 215 were obtained.

<Comparative Example 1: Production of circularly polarizing plate 211>
Except for using the optical laminate 201 instead of the optical laminate 204, an attempt was made to produce a circularly polarizing plate according to the same procedure as in (Preparation of the circularly polarizing plate 214). 21 also peeled off, and a predetermined circularly polarizing plate could not be produced.

In addition, the organic EL panel (organic EL display element) -mounted GALAXY S5 manufactured by Samsunung is disassembled, the touch panel with the circularly polarizing plate is peeled off from the organic EL display device, and the circularly polarizing plate is peeled off from the touch panel. The touch panel and the circularly polarizing plate were isolated from each other. Next, the isolated touch panel is bonded again to the organic EL display element, and the circularly polarizing plates 212 to 215 prepared above are bonded to the touch panel with an adhesive so that the optically anisotropic layer side is the panel side. Thus, an organic EL display device was produced.
The produced organic EL display device was evaluated in the same manner as when pure ace WR (manufactured by Teijin Limited) was used as the optically anisotropic layer (λ / 4 plate). It was confirmed that the same effect was exhibited.

In the production of the circularly polarizing plates 212 and 213, the peeling of the film 22 and the film 23 does not occur when the film 11 is peeled off, but the peeling force of the film 22 and the film 23 exceeds 0.50 N / 25 mm. Therefore, it is a little difficult to peel off.
Moreover, since the peeling force of the film 12 in the optical laminated body 112 is smaller than 0.10 N / 25 mm, the film 12 is slightly peeled off, and the handling of the optical laminated body 112 is slightly difficult.
Therefore, the peel force of the first peelable support in the first optical laminate and the peel force of the second peelable support in the second optical laminate are both 0.10 to 0.50 N / 25 mm. Thus, failure during roll-to-roll stacking can be further reduced.

<Production of third optical laminate>
As the third optical laminate, optical laminates 301 to 303 were produced according to the following procedure.

(Preparation of optical laminate 301)
As the transparent support, a commercially available triacetyl cellulose film (hereinafter also referred to as film 31) “Z-TAC” (manufactured by FUJIFILM Corporation) was used. On the film 31, the following alignment film forming composition 31 was continuously applied with a # 8 wire bar. The obtained coating film was dried with warm air of 60 ° C. for 60 seconds and further with warm air of 100 ° C. for 120 seconds to form an alignment film 31.
The film 31 corresponds to a peelable support.
───────────────────────────────
Composition 31 for forming alignment film
───────────────────────────────
Polyvinyl alcohol (manufactured by Kuraray, PVA103) 2.4 parts by mass Isopropyl alcohol 1.6 parts by mass Methanol 36 parts by mass Water 60 parts by mass ────────────────────── ─────────

The following optically anisotropic layer forming composition 31 was applied on the alignment film 31 produced above. After the obtained coating film was aged at 60 ° C., it was irradiated with 1000 mJ / cm ² of ultraviolet rays using an air-cooled metal halide lamp (manufactured by Eye Graphics Co., Ltd.) of 70 mW / cm ² under air. By fixing the alignment state, the polymerizable rod-like liquid crystalline compound was vertically aligned to obtain an optical laminate 301 including an optically anisotropic layer (positive C plate film 301). The Rth (550) of the positive C plate film 301 was −60 nm.

──────────────────────────────────
Optically anisotropic layer forming composition 31
──────────────────────────────────
Liquid crystalline compound L-1 80 parts by weight Liquid crystalline compound L-2 20 parts by weight Vertical alignment liquid crystalline compound (S01) 1 part by weight vertical alignment agent (S02) 0.5 parts by weight Ethylene oxide modified trimethylolpropane triacrylate (V # 360, manufactured by Osaka Organic Chemical Co., Ltd.) 8 parts by mass Irgacure 907 (manufactured by BASF) 3 parts by mass Kayacure DETX (manufactured by Nippon Kayaku Co., Ltd.) 1 part by mass Compound B03 0.4 parts by mass Methyl ethyl ketone 170 parts by mass 30 parts by mass of cyclohexanone ───────────────────────────────────

(Production of optical laminates 302 and 303)
The film 31 was subjected to an alkali saponification treatment by adjusting the potassium hydroxide concentration of the alkaline solution 1 in the same manner as described above (production of cellulose acylate films 23 to 24), and cellulose acylate films 32 to 33 (hereinafter referred to as “film cellulose acylate films 23 to 24”). Also referred to as films 32-33).
Next, optical laminates 302 to 303 were obtained in the same manner as in (Preparation of optical laminate 301) except that films 32 to 33 were used instead of film 31, respectively.
The films 32 to 33 correspond to a peelable support.

<Preparation of second optical laminate>
(Preparation of optical laminate 205)
In the cellulose acylate film 22, the potassium hydroxide concentration of the alkaline solution 1 was adjusted to obtain a cellulose acylate film 25 (hereinafter also referred to as film 25).
An optical laminate 205 was obtained according to the same procedure as (Preparation of optical laminate 201) except that the cellulose acylate film 25 was used instead of the cellulose acylate film 21.
The film 25 corresponds to a peelable support.

<Production of first optical laminate>
(Preparation of optical laminate 113)
In the cellulose acylate film 11, the potassium hydroxide concentration of the alkaline solution 1 was adjusted to obtain a cellulose acylate film 13 (hereinafter also referred to as film 13).
An optical laminate 113 was obtained according to the same procedure as (Manufacturing of the optical laminate 111) except that the cellulose acylate film 13 was used instead of the cellulose acylate film 11.
The film 13 corresponds to a peelable support.

<Example 5: Production of circularly polarizing plate 312>
Long samples of the optical laminate 111, the optical laminate 201, the optical laminate 302, and the surface film 41 were prepared, and the following roll-to-roll lamination was performed.
The optically anisotropic layer in the optical laminated body 201 and the optically anisotropic layer in the optical laminated body 302 are bonded together via an adhesive, and immediately after bonding, the film 21 of the optical laminated body 201 is peeled off. A laminate B was obtained.
Next, the optically anisotropic layer side surface derived from the optical laminate 201 in the laminate B and the surface of the protective layer in the optical laminate 111 are bonded via an adhesive, immediately after bonding, The film 11 of the optical laminate 111 was peeled off.
Furthermore, the surface on the intermediate layer side of the optical laminate 111 and the surface of the transparent base material 41 in the surface film 41 are bonded together via an adhesive, and immediately after the bonding, the film 32 is peeled off and the circularly polarized light is bonded. A plate 312 was obtained.

<Example 6: Production of circularly polarizing plate 313>
A circularly polarizing plate 313 was obtained according to the same procedure as (preparing the circularly polarizing plate 312) except that the optical laminated body 205 was used instead of the optical laminated body 201.

<Comparative Example 2: Production of circularly polarizing plate 311>
Except for using the optical laminate 301 instead of the optical laminate 302, an attempt was made to produce a circularly polarizing plate according to the same procedure as in (Preparation of the circularly polarizing plate 312). Also, peeling was observed, and a predetermined circularly polarizing plate could not be produced.

<Comparative Example 3: Production of circularly polarizing plate 314>
Preparation of a circularly polarizing plate according to the same procedure as in (Preparation of circularly polarizing plate 312) except that optical layered body 113 was used instead of optical layered body 111 and optical layered body 303 was used instead of optical layered body 302. As a result, when the film 13 was peeled off, the film 33 was peeled off, and a predetermined circularly polarizing plate could not be produced.

The above results are summarized in Table 4.

It was confirmed that the desired effect was obtained when the peel force of the third peelable support and the peel forces of the first peelable support and the second peelable support were in a predetermined relationship.

(Preparation of alignment film forming composition 13)
In a reaction vessel equipped with a stirrer, thermometer, dropping funnel and reflux condenser, 100.0 parts by mass of 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 500 parts by mass of methyl isobutyl ketone, and 10 parts of triethylamine 0.0 part by mass was charged and the mixture was stirred at room temperature. Next, 100 parts by mass of deionized water was added dropwise to the resulting mixture from the dropping funnel over 30 minutes, and then reacted at 80 ° C. for 6 hours while mixing the mixture under reflux. After completion of the reaction, the organic phase was taken out, and the organic phase was washed with 0.2% by mass aqueous ammonium nitrate solution until the washed water became neutral. Thereafter, the solvent and water were distilled off from the obtained organic phase under reduced pressure to obtain a polyorganosiloxane having an epoxy group as a viscous transparent liquid.
The polyorganosiloxane having an epoxy group was analyzed by ¹ H-NMR (Nuclear Magnetic Resonance). As a result, a peak based on the oxiranyl group was obtained in the vicinity of the chemical shift (δ) = 3.2 ppm according to the theoretical intensity. It was confirmed that no side reaction of the epoxy group occurred. The polyorganosiloxane having an epoxy group had a weight average molecular weight Mw of 2,200 and an epoxy equivalent of 186 g / mol.
Next, 10.1 parts by mass of the above-obtained polyorganosiloxane having an epoxy group, an acrylic group-containing carboxylic acid (Toagosei Co., Ltd., trade name “Aronix M-5300”, acrylic acid ω- 0.5 parts by mass of carboxypolycaprolactone (degree of polymerization n≈2), 20 parts by mass of butyl acetate, 1.5 parts by mass of cinnamic acid derivative obtained by the method of Synthesis Example 1 of JP-A-2015-26050, and Then, 0.3 part by mass of tetrabutylammonium bromide was charged, and the resulting mixture was stirred at 90 ° C. for 12 hours. After stirring, the mixture was diluted with an equal amount (mass) of butyl acetate to the obtained mixture, and the diluted mixture was washed with water three times. The operation of concentrating the obtained mixture and diluting with butyl acetate was repeated twice to finally obtain a solution containing a polyorganosiloxane having a photoalignable group (the following polymer C-2). The weight average molecular weight Mw of the polymer C-2 was 9,000. As a result of ¹ H-NMR analysis, the component having a cinnamate group in the polymer C-2 was 23.7% by mass.

The following components were mixed to prepare a photoalignment film-forming composition 13.
――――――――――――――――――――――――――――――― ───
Composition 13 for forming photo-alignment film
――――――――――――――――――――――――――――――― ───
-Polymer C-2 10.67 parts by mass-Low molecular compound R-1 5.17 parts by mass-Additive (B-1) 0.53 parts by mass-Butyl acetate 8287.37 parts by mass-Propylene glycol monomethyl ether acetate 2071.85 parts by mass ――――――――――――――――――――――――――――――― ───

<Example 7: Production of circularly polarizing plate 401>
(Preparation of sample 104), (Preparation of optical laminate 111), and (Preparation of circularly polarizing plate 312), except that composition 13 for photoalignment film formation was used instead of composition 11 for photoalignment film formation. A circularly polarizing plate 401 was obtained according to the same procedure as described above.

<Display performance evaluation>
Disassemble the GALAXYS5 manufactured by SAMSUNG equipped with an organic EL panel (organic EL display element), peel off the touch panel with the circularly polarizing plate from the organic EL display device, and further peel off the circularly polarizing plate from the touch panel. Each circularly polarizing plate was isolated. Subsequently, the isolated touch panel is pasted again with the organic EL display element, and the circularly polarizing plates 312 and 401 produced as described above are pasted on the touch panel via an adhesive so that air does not enter. A display device was produced.
About the produced organic EL display apparatus, visibility and display quality were evaluated under bright light. The display device was displayed in white, and the reflected light when a fluorescent lamp was projected from the front and a polar angle of 45 degrees was observed. The display quality was evaluated according to the following criteria. The evaluation results are summarized in Table 5.
A: Black color is not visually recognized at all.
B: Coloring is visually recognized and the reflectance is high.

The “average refractive index” column shown in Table 5 shows the average refraction of the alignment film formed using the photo-alignment film forming composition 11 and the alignment film formed using the photo-alignment film forming composition 13. Represents a rate.
The “refractive index anisotropy” column shown in Table 5 shows the alignment film formed using the photo-alignment film forming composition 11 and the alignment film formed using the photo-alignment film forming composition 13. Refractive index anisotropy.
In addition, the measuring method of average refractive index and refractive index anisotropy is as having mentioned above.

(Preparation of surface films 42 and 43)
Pellets of a mixture of 90 parts by mass of an acrylic resin represented by the following formula (A) and 10 parts by mass of acrylonitrile-styrene (AS) resin (Toyo AS AS20, manufactured by Toyo Styrene Co., Ltd.) are supplied to a twin screw extruder. Then, it was melt extruded into a sheet at about 280 ° C. to obtain a (meth) acrylic resin sheet having a lactone ring structure. This unstretched sheet was stretched longitudinally and laterally under a temperature condition of 160 ° C. to obtain a transparent support 42 having a thickness of 40 μm.

Formula (A)

In the above general formula (6), R ¹ is a hydrogen atom, R ² and R ³ are methyl groups, and a (meth) acrylic resin having a lactone ring structure (copolymerization monomer mass ratio = methyl methacrylate / 2- (hydroxy Methyl) methyl acrylate = 8/2, lactone cyclization rate about 100%, lactone ring structure content 19.4%, mass average molecular weight 133000, melt flow rate 6.5 g / 10 min (240 ° C., 10 kgf), Tg 131 ° C.).

In a twin screw extruder, cycloolefin resin (manufactured by Nippon Zeon Co., Ltd., glass transition temperature 123 ° C.) is benzotriazole based on 100 parts of cycloolefin resin under the conditions described in JP-A-2015-160324. 7.5 parts of an ultraviolet absorber (LA-31, manufactured by ADEKA) was kneaded. A transparent support 43 having a film thickness of 40 μm was obtained by extrusion molding using the kneaded resin.

One surface of the transparent supports 42 and 43 prepared above is corona-treated in advance, and then the hard coat layer-forming composition 1 is applied, and a hard coat layer having a thickness of 5 μm is applied under the same conditions as the surface film 41. The surface films 42 and 43 were obtained.

<Examples 8 to 9: Production of circularly polarizing plate>
In the circularly polarizing plate 312 of Example 5, the circularly polarizing plate 502 and the circularly polarizing plate 502 and 503 was produced.
When the above-described <display performance evaluation> was performed using the obtained circularly polarizing plates 502 and 503, good results were obtained by reflected light observation.

In the above-described embodiment, the embodiment using the sample 104 has been described. However, similar results were obtained when the other samples 101 to 103 and 105 to 107 were used.

DESCRIPTION OF SYMBOLS 10 1st optical laminated body 12 1st peelable support body 14 1st alignment film 16 Light absorption anisotropic layer 20 2nd optical laminated body 22 2nd peelable support body 24 2nd alignment film 26 Optical anisotropic layer A
30 Laminate X
40 surface film 42 hard coat layer 44 base material 50,100 optical laminate 60,110 display device 62 display element 70 third optical laminate 72 optical anisotropic layer B
74 Third peelable support 80 Laminate Y
90 Laminate Z

Claims

A surface on the light absorption anisotropic layer side of the first optical laminate having a first peelable support, a first alignment film, and a light absorption anisotropic layer in this order; a second peelability support; The first optical laminate and the first optical laminate so that the surface on the optical anisotropic layer A side of the second optical laminate having the second alignment film and the optical anisotropic layer A in this order face each other. Stacking two optical laminates, peeling the first peelable support to obtain a laminate X,
A surface film is laminated on the surface of the laminate X on the first alignment film side, the second peelable support is peeled off, the surface film, the light absorption anisotropic layer, and the optical anisotropic Obtaining an optical layered body having a conductive layer A,
The light absorption anisotropic layer is formed using a liquid crystalline composition containing a dichroic substance and a liquid crystalline compound,
The manufacturing method of an optical laminated body whose peeling force of a said 1st peelable support body is smaller than the peeling force of a said 2nd peelable support body.
A surface on the optically anisotropic layer A side of the second optical laminate having the second peelable support, the second alignment film, and the optically anisotropic layer A in this order; a third peelable support; The second optical laminate and the third optical laminate are arranged such that the surface of the third optical laminate having the optical anisotropic layer B in this order faces the optical anisotropic layer B side. Laminating and peeling the second peelable support to obtain a laminate Y;
The light absorption difference of the first optical laminate having the surface of the laminate Y on the second alignment film side, the first peelable support, the first alignment film, and the light absorption anisotropic layer in this order. Laminating the laminate Y and the first optical laminate so that the surface on the side of the isotropic layer faces, and peeling off the first peelable support to obtain a laminate Z;
A surface film is laminated on the surface of the laminate Z on the first alignment film side, the third peelable support is peeled off, and the surface film, the light absorption anisotropic layer, the optical anisotropic layer are separated. Obtaining an optical laminate having A and the optically anisotropic layer B, and
The light absorption anisotropic layer is formed using a composition containing a dichroic substance and a liquid crystal compound,
The peel force of the first peelable support is smaller than the peel force of the third peelable support, and the peel force of the second peelable support is smaller than the peel force of the third peelable support. The manufacturing method of an optical laminated body.
The manufacturing method of the optical laminated body of Claim 1 or 2 with which the said dichroic substance contains the compound represented by Formula (1).

In formula (1), A 1 , A 2 and A 3 each independently represents a divalent aromatic group which may have a substituent.
L 1 and L 2 each independently represent a substituent.
m represents an integer of 1 to 4, and when m is an integer of 2 to 4, a plurality of A 2 may be the same or different from each other.
The method for producing an optical laminate according to any one of claims 1 to 3, wherein the dichroic substance contains a compound represented by the formula (2).

In formula (2), C 1 and C 2 each independently represent a monovalent substituent. However, at least one of C 1 and C 2 represents a crosslinkable group.
M 1 and M 2 each independently represents a divalent linking group. However, at least one of M 1 and M 2 has 4 or more main chain atoms.
Ar 1 and Ar 2 are each independently any one of a phenylene group that may have a substituent, a naphthylene group that may have a substituent, and a biphenylene group that may have a substituent. Represents a group.
E represents one of a nitrogen atom, an oxygen atom, and a sulfur atom.
R 1 represents a hydrogen atom or a substituent.
R 2 represents a hydrogen atom or an alkyl group which may have a substituent.
n represents 0 or 1. However, n is 1 when E is a nitrogen atom, and n is 0 when E is an oxygen atom or a sulfur atom.
The method for producing an optical laminated body according to any one of claims 1 to 4, wherein the dichroic substance contains a compound represented by the formula (3).

In formula (3), A and B each independently represent a crosslinkable group.
a and b each independently represents 0 or 1; However, a + b ≧ 1.
When a = 0, L 1 represents a monovalent substituent, and when a = 1, L 1 represents a single bond or a divalent linking group. Further, when b = 0, L 2 represents a monovalent substituent, and when b = 1, L 2 represents a single bond or a divalent linking group.
Ar 1 represents an (n1 + 2) -valent aromatic hydrocarbon group or heterocyclic group, Ar 2 represents an (n2 + 2) -valent aromatic hydrocarbon group or heterocyclic group, and Ar 3 represents an (n3 + 2) -valent aromatic group A hydrocarbon group or a heterocyclic group is represented.
R 1 , R 2 and R 3 each independently represents a monovalent substituent. When n1 ≧ 2, the plurality of R 1 may be the same or different from each other, and when n2 ≧ 2, the plurality of R 2 may be the same or different from each other, and when n3 ≧ 2 The plurality of R 3 may be the same as or different from each other.
k represents an integer of 1 to 4. When k ≧ 2, the plurality of Ar 2 may be the same as or different from each other, and the plurality of R 2 may be the same as or different from each other.
n1, n2 and n3 each independently represents an integer of 0 to 4. However, when k = 1, n1 + n2 + n3 ≧ 0, and when k ≧ 2, n1 + n2 + n3 ≧ 1.
The liquid crystal compound includes a polymer liquid crystal compound including a repeating unit represented by the formula (4). In the formula (4), the difference between the log P value of P1, L1, and SP1 and the log P value of M1 is The method for producing an optical laminate according to any one of claims 1 to 5, wherein the number is 4 or more.

In formula (4), P1 represents the main chain of a repeating unit. L1 represents a single bond or a divalent linking group. SP1 represents a spacer group. M1 represents a mesogenic group. T1 represents a terminal group.
The method for producing an optical laminated body according to any one of claims 1 to 6, wherein an average refractive index of the first alignment film at a wavelength of 550 nm is 1.55 to 1.80.
The method for producing an optical laminated body according to any one of claims 1 to 7, wherein the optically anisotropic layer A is a λ / 4 plate.
The method for producing an optical laminate according to any one of claims 1 to 8, wherein the surface film has a base material and a hard coat layer.
The method for producing an optical laminate according to claim 9, wherein the base material contains at least one selected from the group consisting of an acrylic resin, a methacrylic resin, a cyclic polyolefin resin, and a polyester resin.
The optical laminate and the optical laminate manufactured by the manufacturing method according to any one of claims 1 to 10, such that the surface opposite to the surface film side of the optical laminate and the display element face each other. A method for manufacturing a display device, comprising a step of manufacturing a display device by stacking a display element.
The method for manufacturing a display device according to claim 11, wherein an adhesion layer is disposed between the optical laminate and the display element.