TW201936902A - Optically anisotropic body and method for manufacturing same - Google Patents

Abstract

An optically anisotropic body provided with an optically anisotropic layer including a first region and a second region satisfying conditions (1) through (3), the optically anisotropic layer being formed from a cured material of a liquid crystal composition including a liquid crystalline compound. (1) In a cross section of the optically anisotropic layer parallel to both the thickness direction and the in-plane slow axis of the optically anisotropic layer, the first region has a first slow axis that is inclined with respect to the in-plane direction of the optically anisotropic layer. (2) In the aforementioned cross section, the second region has a second slow axis that is inclined with respect to the in-plane direction of the optically anisotropic layer. (3) In the aforementioned cross section, the angle [Delta][Theta] formed by the first slow axis and the second slow axis is 40 DEG to 80 DEG.

Description

Optical anisotropic body and method of manufacturing same

The present invention relates to an optical anisotropic body and a method of manufacturing the same.

As one of the optical members, an optical anisotropic body produced using a liquid crystal compound is known. The optically anisotropic body generally includes an optically anisotropic layer containing a region formed by a cured product in which a liquid crystal composition containing a liquid crystalline compound is oriented and maintained in an oriented state to be directly cured. Patent Document 1 has been proposed as such an optical anisotropic body.

"Patent Literature"
Patent Document 1: Japanese Patent No. 5363022

The optically anisotropic layer provided in the optical anisotropic body usually has an in-plane retardation due to a liquid crystal compound. According to this, the optical anisotropic body can be applied to a polarizing plate such as a circularly polarizing plate or an elliptically polarizing plate which is provided on an organic electroluminescence display panel (hereinafter referred to as an "organic EL display panel"). This polarizing plate usually contains a linear polarizer in combination with an optical anisotropic body. Since such a polarizing plate can function as a reflection suppressing film having a reflection suppressing ability, it can be provided on the display surface of the organic EL display panel to suppress reflection of external light in the front direction of the display surface.

Further, from the viewpoint of suppressing reflection of external light in the oblique direction of the display surface and obtaining excellent viewing angle characteristics, it is preferable that the optically anisotropic layer moderately adjusts birefringence in the thickness direction thereof. The retardation in the oblique direction of the optically anisotropic layer can be adjusted by adjusting the birefringence of the optically anisotropic layer in the thickness direction. According to this, as long as an optical anisotropic body having such an optically anisotropic layer is used, a polarizing plate capable of suppressing reflection of external light in an oblique direction can be obtained. In order to adjust the birefringence in the thickness direction, for example, it is conceivable that the molecules of the liquid crystalline compound contained in the optically anisotropic layer are inclined with respect to the plane plane of the optically anisotropic layer.

As a technique for inclining the molecules of the liquid crystal compound with respect to the plane plane of the optically anisotropic layer, as described in Patent Document 1, various studies have been conducted in the past. However, the retardation of the oblique direction of the optically anisotropic layer of the optical anisotropic body obtained by the prior art has a directional dependence. Here, the direction dependence of the delay means that the delay differs depending on the orientation.

Therefore, in the conventional optically anisotropic layer, the retardation in the oblique direction is not constant, and the orientation in each oblique direction is different. In particular, there is a tendency that the retardation is greatly different between the oblique direction perpendicular to the slow axis in the plane of the optically anisotropic layer and the oblique direction perpendicular to the in-plane fast axis of the optically anisotropic layer. Therefore, when the conventional optical anisotropic body is applied to the reflection suppressing film, the reflection suppressing ability in the oblique direction is directional. The direction dependence of the reflection suppression ability refers to the property that the reflection suppression ability differs depending on the orientation.

Further, the direction dependence of the retardation in the oblique direction of the optically anisotropic layer may cause problems in applications other than the reflection suppressing film. For example, in the case where an optical anisotropic body is provided as an optical member such as a phase difference plate, a wave plate, or an optical compensation film in a liquid crystal display device, the delay in the oblique direction is different in each orientation, and thus Display performance such as black brightness observed from the oblique direction causes direction dependence. The term "black brightness" refers to the brightness of the display surface in the black display state. The black display state refers to a state in which the entire surface of the display surface is displayed in black. Further, the direction dependence of the display performance refers to the property that the display performance differs depending on the orientation.

In view of the above, development of a technique capable of suppressing the direction dependence of the delay in the oblique direction has been demanded.

The present invention has been made in view of the above problems, and an object of the invention is to provide an optical anisotropic body having an "optical anisotropic layer capable of suppressing the direction dependence of retardation in an oblique direction" and a method for producing the same.

The present inventors have diligently studied to solve the aforementioned problems. As a result, the inventors have found that the optically anisotropic layer contains the following elements in the cross section of the optically anisotropic layer in the slow axis and the thickness direction parallel to the plane of the optically anisotropic layer ( The combination of the first region and the second region of 1) to (3) solves the aforementioned problems and further completes the present invention.
(1) The first region has a first slow axis that is inclined with respect to the in-plane direction of the optically anisotropic layer.
(2) The second region has a second slow axis that is inclined with respect to the in-plane direction of the optically anisotropic layer.
(3) The angle Δθ between the first slow axis and the second slow axis is within a specified range.

That is, the present invention encompasses the following.

[1] An optical anisotropic body comprising: an optically anisotropic layer comprising a first region and a second region, wherein the first region and the second region are cured products of a liquid crystal composition comprising a liquid crystal compound Form and meet the following requirements (1) to (3):
(1) in the cross section of the optically anisotropic layer parallel to both the slow axis and the thickness direction of the in-plane optical anisotropic layer, the first region has an in-plane direction with respect to the optically anisotropic layer The first slow axis of the tilt;
(2) in the cross section, the second region has a second slow axis that is inclined with respect to the in-plane direction of the optically anisotropic layer; (3) in the cross section, the first slow axis and the second slow The angle Δθ sandwiched by the shaft is 40° to 80°.

[2] The optical anisotropic body according to [1], wherein an angle between the in-plane slow axis of the first region and the in-plane slow axis of the second region is 0 to 5 degrees.

[3] The optical anisotropic body according to [1] or [2] wherein, in the aforementioned cross section of the optically anisotropic layer, the first slow axis of the first region is opposite to the optically anisotropic layer The angle θ1 between the in-plane directions is 20° to 40°.
In the cross section of the optically anisotropic layer, the angle θ2 of the second slow axis of the second region with respect to the in-plane direction of the optically anisotropic layer is 20° to 40°.

[4] The optical anisotropic body according to any one of [1] to [3] wherein the in-plane retardation of the optically anisotropic layer having a measurement wavelength of 550 nm is 100 nm or more and 180 nm or less. .

[5] The optical anisotropic body according to any one of [1] to [3] wherein the in-plane retardation of the optically anisotropic layer having a measurement wavelength of 550 nm is 240 nm or more and 320 nm or less .

[6] The optical anisotropic body according to [4], wherein the in-plane retardation of the first region at a measurement wavelength of 550 nm and the in-plane retardation of the second region are both 30 nm or more.

[7] The optical anisotropic body according to [5], wherein the in-plane retardation of the first region at a measurement wavelength of 550 nm and the in-plane retardation of the second region are both 60 nm or more.

[8] The optical anisotropic body according to any one of [1] to [7] which is a retardation film.

The method for producing an optical anisotropic body according to any one of [1] to [8], comprising:
a step of preparing a layer body formed of a cured product of a liquid crystal composition containing a liquid crystal compound; and a step of bonding the layer body.

[10] The method for producing an optical anisotropic body according to any one of [1] to [8], comprising:
a step of preparing a layer body formed of a liquid crystal composition containing a liquid crystal compound;
a step of bonding the layer body; and a step of curing the layered body to be bonded.

[11] A polarizing plate comprising the optical anisotropic body according to any one of [1] to [8], and a linear polarizer.

According to the present invention, it is possible to provide an optical anisotropic body having an "optical anisotropic layer capable of suppressing the direction dependence of retardation in the oblique direction" and a method for producing the same.

The invention will be described in detail below by way of examples and embodiments. However, the present invention is not limited to the examples and embodiments disclosed below, and may be modified without departing from the scope of the invention and the scope of the invention.

In the following description, the "in-plane direction" of a layer body means a direction parallel to the plane of the layer plane unless otherwise noted.

In the following description, the "thickness direction" of a layer body means a direction perpendicular to the plane of the layer plane unless otherwise noted. Therefore, unless otherwise noted, the in-plane direction of a layer is perpendicular to the thickness direction.

In the following description, the "inclination direction" of a layer body, unless otherwise noted, indicates a direction that is neither parallel nor perpendicular to the plane of the layer plane, specifically, the polar angle of the plane of the layer plane is 5° or more. And the direction of the range below 85 °.

In the following description, the "orientation" of the tilt direction of a layer body, unless otherwise noted, indicates the composition of the tilt direction parallel to the plane of the layer plane.

In the following description, the "front direction" of a certain surface indicates the normal direction of the surface unless otherwise noted, and specifically refers to the direction in which the polar angle of the surface is 0°.

In the following description, the "inclination direction" of a certain surface means that the direction of the surface is neither parallel nor perpendicular unless otherwise noted. Specifically, the polar angle of the surface is 5° or more and 85° or less. The direction of the range.

In the following description, the "in-plane slow axis" of a layer body refers to the slow axis in the in-plane direction unless otherwise noted.

In the following description, the "in-plane fast axis" of a layer body refers to the fast axis in the in-plane direction unless otherwise noted.

In the following description, an element is "slanted" with respect to the in-plane direction (ie, relative to the plane of the layer), indicating that the element is neither parallel nor perpendicular with respect to the in-plane direction (ie, relative to the plane of the layer). . The angle at which the aforementioned elements are interposed with respect to the in-plane direction (i.e., with respect to the plane of the layer) is generally in the range of 5° or more and 85° or less.

In the following description, the directions of the elements are "parallel" and "vertical", and unless otherwise noted, it is preferable to include, for example, ±4° and ±3° within a range that does not impair the effects of the present invention. ±1° is the error within the preferred range.

In the following description, unless otherwise noted, the "inclination angle" of the molecule of the liquid crystalline compound contained in a layer body indicates the angle at which the molecules of the liquid crystal compound are sandwiched with respect to the plane of the layer. This inclination corresponds to the largest angle among the angles of the direction of the maximum refractive index on the refractive index ellipsoid of the molecules of the liquid crystalline compound and the plane of the layer plane. Therefore, in the case where the direction of the maximum refractive index on the index ellipsoid is one, the angle between this direction and the plane of the layer plane corresponds to the inclination angle. Further, in the case where the direction of the maximum refractive index on the index ellipsoid is plural, the direction in which the angle between the planes and the plane of the layer plane is the largest is equal to the plane of the layer plane, which corresponds to the inclination angle. .

In the following description, the inverse wavelength dispersion birefringence, unless otherwise noted, means that the birefringence Δn (450) at a wavelength of 450 nm and the birefringence Δn (550) at a wavelength of 550 nm satisfy the following formula ( Birefringence of N1). Such a liquid crystal compound having a reverse wavelength dispersion birefringence can be exhibited, and generally, the longer the measurement wavelength, the larger the birefringence can be expressed.
Δn(450)<Δn(550) (N1)

In the following description, the so-called wavelength-dispersive birefringence, unless otherwise noted, means that the birefringence Δn (450) at a wavelength of 450 nm and the birefringence Δn (550) at a wavelength of 550 nm satisfy the following formula ( Birefringence of N2). Such a liquid crystal compound having a birefringence with a wavelength dispersion can be expressed, and generally, the longer the measurement wavelength, the smaller the birefringence can be expressed.
Δn(450)>Δn(550) (N2)

In the following description, the in-plane retardation of a layer is retarded by a value represented by Re = (nx - ny) × d unless otherwise noted. Here, nx represents a refractive index in a direction perpendicular to the thickness direction of the layer body (in-plane direction) and giving a direction of maximum refractive index. Ny denotes the refractive index of the layer in the in-plane direction and the direction orthogonal to the direction of nx. d represents the thickness of the layer. The measured wavelength of the delay is 550 nm unless otherwise noted. The in-plane retardation Re can be measured using a phase difference meter ("AxoScan" manufactured by Axometrics Co., Ltd.).

In the following description, the resin having a positive intrinsic birefringence value means that the refractive index in the extending direction becomes a resin having a larger refractive index than the direction orthogonal thereto. Further, the resin having a negative intrinsic birefringence value means a resin having a refractive index in the extending direction which is smaller than a refractive index in a direction orthogonal thereto. The intrinsic birefringence value can be calculated from the dielectric constant distribution.

In the following description, the number of carbon atoms having a substituent group does not contain the number of carbon atoms of the above substituent unless otherwise noted. By way of example, the "alkyl group having 1 to 20 carbon atoms which may have a substituent" means that the number of carbon atoms of the alkyl group itself having no substituent is from 1 to 20.

[1. First embodiment of optical anisotropic body]

(1.1. Description of the first slow axis of the first region and the second slow axis of the second region)

Fig. 1 is a perspective view showing an optical anisotropic body 10 according to a first embodiment of the present invention. As shown in FIG. 1, the optical anisotropic body 10 according to the first embodiment of the present invention is provided with an optically anisotropic layer 100. The optically anisotropic layer 100 has an in-plane slow axis A1 in which the refractive index becomes maximum in the in-plane direction of the optically anisotropic layer 100, and a refractive index becomes in the in-plane direction of the optically anisotropic layer 100. The smallest in-plane fast axis A2. Further, in FIG. 1, the thickness direction of the optically anisotropic layer 100 is indicated by an arrow A3. Further, the direction of inclination of the polar angle φ1 of the layer plane of the optically anisotropic layer 100 with respect to the azimuth angle φ2 of the in-plane slow axis A1 is indicated by an arrow A4, and is represented by an arrow A4 by an arrow A5. The orientation of the oblique direction.

Fig. 2 is a schematic cross-sectional view showing an optically anisotropic layer 100 of the optical anisotropic body 10 according to the first embodiment of the present invention. In FIG. 2, it is disclosed that the optically anisotropic layer 100 is cut in a plane parallel to both the in-plane slow axis A1 (refer to FIG. 1) and the thickness direction A3 (refer to FIG. 1) of the optical anisotropic layer 100. Section 100S. In the following description, a cross section of the layer body parallel to both the in-plane slow axis and the thickness direction of a layer body may be referred to as a "specific section".

As shown in FIG. 2, the optically anisotropic layer 100 includes a first region 110 and a second region 120 which are formed of a cured product of a liquid crystal composition containing a liquid crystal compound. The first region 110 and the second region 120 are layered regions in which the in-plane direction A6 of the optically anisotropic layer 100 is parallel (that is, parallel to the plane of the layer). Further, the first region 110 and the second region 120 are located at different positions in the thickness direction A3 (see FIG. 1) of the optical anisotropic layer 100. In the present embodiment, an example will be described in which the entire optically anisotropic layer 100 is a layered body formed of a cured product of a liquid crystal composition, and a part thereof becomes a first region 110, and the remaining portion thereof becomes The second area 120. In the following description, a layer formed of a cured layer of a liquid crystal composition is referred to as a "liquid crystal cured layer" as appropriate. Therefore, in the example disclosed in the present embodiment, the first region 110 is a region included in a certain range of the thickness direction of the liquid crystal cured layer of the optically anisotropic layer 100, and the second region 120 is a liquid crystal cured layer. The area covered by another range of thickness directions.

Since the first region 110 is formed of a cured product of a liquid crystal composition, it contains a liquid crystalline compound. The "liquid crystal compound" contained in the cured product of the liquid crystal composition also contains a polymerized liquid crystal compound. In the first region 110, at least a part of molecules (not shown) of the liquid crystal compound are oriented in a direction inclined with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the plane of the layer). Therefore, the first region 110 has a first slow axis A110 that is inclined with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the plane of the layer plane) in a specific section 100S of the optically anisotropic layer 100 ( Essential (1)). The first slow axis A110 is a direction in which the refractive index of the first region 110 is the largest among the directions parallel to the specific cross section 100S of the optical anisotropic layer 100.

On the other hand, since the second region 120 is also formed of a cured product of a liquid crystal composition, it contains a liquid crystalline compound. Further, in the second region 120, molecules (not shown) of at least a part of the liquid crystal compound are inclined with respect to the in-plane direction A6 of the optical anisotropic layer 100 (that is, with respect to the plane of the layer). Therefore, the second region 120 has a second slow axis A120 that is inclined with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the plane of the layer plane) in a specific section 100S of the optically anisotropic layer 100 ( Essential (2)). This second slow axis A120 is a direction in which the refractive index of the second region 120 is the largest among the directions parallel to the specific section 100S of the optical anisotropic layer 100.

Furthermore, in the specific section 100S of the optically anisotropic layer 100, the first slow axis A110 and the second slow axis A120 are at an angle Δθ of a specified range. Specifically, the angle Δθ is usually 40° or more, preferably 50° or more, more preferably 55° or more, and usually 80° or less, preferably 70° or less, and particularly preferably 65° or less.

The retardation in the oblique direction A4 of the first region 110 and the second region 120 formed by the cured product of the liquid crystal composition generally has a directional dependence. However, by combining the first region 110 having the first slow axis A110 and the second region 120 having the second slow axis A120, the direction dependence of the delay of the first region 110 and the delay of the second region 120 can be offset. Direction dependence. According to this, the direction dependence of the delay in the oblique direction A4 can be suppressed as a whole of the optical anisotropic layer 100 including the first region 110 and the second region 120. Therefore, in any of the directions A5 (refer to FIG. 1), it is generally possible to obtain a delay of a similar value, and it is preferable to obtain a delay of the same value. Therefore, for example, when the optical anisotropic body 10 including the optical anisotropic layer 100 and the linear polarizer are combined to obtain a polarizing plate, the direction dependence of the reflection suppressing ability in the oblique direction A4 can be suppressed.

In the specific section 100S of the optically anisotropic layer 100, the first slow axis A110 of the first region 110 is in the in-plane direction A6 with respect to the optical anisotropic layer 100 (in the viewpoint of effectively suppressing the direction dependence of the retardation). That is, the angle θ1 sandwiched with respect to the plane of the layer is preferably within a specified range. Specifically, the angle θ1 is preferably 20° or more, preferably 25° or more, more preferably 27° or more, and most preferably 40° or less, preferably 35° or less, and preferably 33° or less. . Thereby, for example, when the optical anisotropic body 10 and the linear polarizer are combined to obtain a polarizing plate, the direction dependence of the reflection suppressing ability can be effectively suppressed.

In the specific section 100S of the optically anisotropic layer 100, the second slow axis A120 of the second region 120 is in the in-plane direction A6 with respect to the optical anisotropic layer 100 (in the viewpoint of effectively suppressing the direction dependence of the retardation). That is, the angle θ2 sandwiched with respect to the plane of the layer is preferably within a specified range. Specifically, the angle θ2 is preferably 20° or more, preferably 25° or more, more preferably 27° or more, and most preferably 40° or less, preferably 35° or less, and preferably 33° or less. . Thereby, for example, when the optical anisotropic body 10 and the linear polarizer are combined to obtain a polarizing plate, the direction dependence of the reflection suppressing ability can be effectively suppressed.

Furthermore, in the specific section 100S, the first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 have a certain It is preferable that the symmetry plane parallel to the in-plane direction A6 of the opposite layer 100 (that is, the plane of symmetry parallel to the plane of the layer plane) is close to plane symmetry. Accordingly, the angle θ1 and the angle θ2 are preferably similar, and the same value is more preferable. Specifically, the absolute value |θ1 - θ2| of the difference between the angle θ1 and the angle θ2 is preferably 20° or less, more preferably 15° or less, and particularly preferably 10° or less.

The first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 in the specific section 100S of the optically anisotropic layer 100 may be included by polarization observation to be parallel to the in-plane slow axis A1. A slice of the profile of the emerging optically anisotropic layer 100 is cut to measure.

The optically anisotropic layer 100 is usually cut in a plane parallel to both the in-plane slow axis A1 and the thickness direction A3 of the optically anisotropic layer 100 to form a specific section 100S. Then, a polarized observation including a slice of this specific section 100S was performed. Polarized observation can be carried out under a polarized microscope using a polarizing microscope. At this time, the optically anisotropic layer 100 is rotated about the axis perpendicular to the specific cross section 100S while the polarizing observation is performed, and the extinction positions of the first region 110 and the second region 120 are specified. Then, from the particular extinction position, the first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 in the particular profile 100S are obtained.

Incidentally, the first region 110 and the second region 120 are generally thin. Therefore, even if the slice including the specific section 100S is to be observed as described above to specify the extinction position, the magnification of the polarizing microscope may be insufficient. In this case, as shown in FIG. 3, the first evaluation axis 100E obtained by cutting the optical anisotropic layer 100 may be used to measure the first slow axis A110 of the first region 110 in the specific section 100S and The second slow axis A120 of the second region 120 is parallel to the in-plane slow axis A1 of the optically anisotropic layer 100 and non-parallel to the thickness direction A3. 3 is a perspective view showing a portion of the optically anisotropic layer 100 as an example of a plane cut parallel to the in-plane slow axis A1 of the optically anisotropic layer 100 and not parallel to the thickness direction A3. Specifically, the slice including the evaluation cross section 100E is observed by polarized light, and the extinction sites of the first region 110 and the second region 120 are specified. The slow axis A130 of the first region 110 and the slow axis A140 of the second region 120 in the evaluation cross section 100E are obtained from the specific extinction position. Then, from the slow axis A130 and the slow axis A140 in the evaluation section 100E, the first slow axis A110 and the second slow axis A120 in the specific section 100S can be obtained by calculation.

(1.2. Explanation of the orientation state of molecules of the liquid crystalline compound in the first region and the second region)

The first region 110 and the second region 120 of the optically anisotropic layer 100 are formed by a cured product of a liquid crystal composition as described above. The curing of the liquid crystal composition is usually achieved by polymerizing a polymerizable compound contained in the liquid crystal composition. Therefore, when the liquid crystal compound has polymerizability, the liquid crystal compound is polymerized at the time of curing of the liquid crystal composition. The liquid crystalline compound thus polymerized is also contained in the liquid crystalline compound contained in the cured product of the liquid crystal composition. In the cured product of the liquid crystal composition, the orientation state of the molecules of the liquid crystal compound is usually fixed.

The first region 110 and the second region 120 of the optically anisotropic layer 100 include molecules of a liquid crystal compound oriented in a manner inclined with respect to the in-plane direction A6 of the optically anisotropic layer 100 (that is, with respect to the plane of the layer plane) Therefore, the first slow axis A110 of the first region 110 and the second slow axis A120 of the second region 120 in the specific section 100S, as shown in FIG. 2, may be opposite to the in-plane direction A6 of the optical anisotropic layer 100. (ie, relative to the plane of the layer) is inclined. At this time, the orientation state of the molecules of the liquid crystal compound is arbitrary within a range in which the desired first slow axis A110 and second slow axis A120 can be obtained.

4 is a schematic cross-sectional view showing an optically anisotropic layer 100 of the optical anisotropic body 10 according to the first embodiment of the present invention, in order to disclose an example of the orientation state of the molecules 111 and 121 of the liquid crystal compound. As shown in FIG. 4, the molecules 111 of the liquid crystalline compound contained in the first region 110 of the optically anisotropic layer 100 may have a uniform tilt angle. In this case, generally, the tilt angle of the molecules 111 of the liquid crystalline compound contained in the first region 110 may be opposite to the in-plane direction A6 of the optically anisotropic layer 100 in the specific cross section 100S (ie, The angle θ1 sandwiched by the layer plane is the same. Further, the molecules 121 of the liquid crystalline compound contained in the second region 120 of the optically anisotropic layer 100 may have a uniform tilt angle. In this case, generally, the tilt angle of the molecules 121 of the liquid crystalline compound included in the second region 120 may be opposite to the in-plane direction A6 of the optically anisotropic layer 100 in the specific cross section 100S (ie, The angle θ2 sandwiched with respect to the plane of the layer is the same.

5 to 7 are diagrams showing the optically anisotropic layer 100 of the optical anisotropic body 10 according to the first embodiment of the present invention, respectively, in order to disclose an example of the orientation state of the molecules 111 and 121 of the liquid crystal compound. Schematic diagram of the section. As shown in FIGS. 5 to 7, the molecules 111 of the liquid crystal compound and the molecules 121 of the liquid crystal compound contained in the first region 110 and the second region 120 of the optically anisotropic layer 100 may have uneven tilt angles. For example, there is an orientation in which the tilt angles of the molecules of the liquid crystal compound are different in the thickness direction A3 (for example, Japanese Patent No. 5363022, International Patent Publication No. 2018/173778 (or Japanese Patent Application No. 2017-060122) Japanese Patent Publication No. 2018-163218 (or Japanese Patent Application No. 2017-059327), Japanese Patent Publication No. 2018-162379 (or Japanese Patent Application No. 2017-060154), and International Patent Publication No. 2018/173773 No. (or Japanese Patent Application No. 2017-060159)), such orientation can also be applied to the first region 110 and the second region 120.

In the case where the inclination angle is not uniform, the inclination angle of the molecule 111 of the liquid crystal compound on the side of the first region 110 is different from that of the other side. Further, in the case where the inclination angle is not uniform, the inclination angle of the molecule 121 of the liquid crystal compound on the side of the second region 120 is different from that of the other side. In this case, the combination of the direction of the first region 110 and the direction of the second region 120 is arbitrary. For example, as shown in FIG. 5, the first region 110 and the second region 120 may be opposite to the interface on the side where the inclination angle of the first region 110 is smaller and the inclination angle of the second region 120 is smaller. Direction to set. For example, as shown in FIG. 6 , the first region 110 and the second region 120 may have an interface angle on which the inclination of the first region 110 is larger and the inclination of the second region 120 is greater. Set in the direction of the direction. Furthermore, for example, as shown in FIG. 7 , the first region 110 and the second region 120 may have an interface in which the inclination angle of the first region 110 is larger and the inclination of the second region 120 is smaller. Set in the opposite direction. Further, for example, the first region 110 and the second region 120 may be disposed in a direction in which the interface on the side where the inclination angle of the first region 110 is smaller and the direction in which the inclination angle of the second region 120 is larger.

(1.3. Description of the in-plane slow axis)

In the case where the optical anisotropic layer 100 is viewed from the thickness direction A3, the in-plane slow axis of the first region 110 (not shown) and the in-plane slow axis of the second region 120 (not shown) are sandwiched between The angle is usually 0° to 5°, preferably 0° to 4°, preferably 0° to 3°, and more preferably 0° to 1°. Thus, viewed from the thickness direction A3, the in-plane slow axis of the first region 110 and the in-plane slow axis of the second region 110 are preferably parallel or nearly parallel. Thereby, the directional dependence of the retardation of the optically anisotropic layer 100 in the oblique direction can be effectively suppressed.

In the case where the optically anisotropic layer 100 is viewed from the thickness direction A3, the angle between the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis of the first region 110 (not shown) is usually It is preferably 0° to 5°, preferably 0° to 4°, more preferably 0° to 3°, and particularly preferably 0° to 1°. Further, in the case where the optical anisotropic layer 100 is viewed from the thickness direction A3, the angle between the in-plane slow axis A1 of the optical anisotropic layer 100 and the in-plane slow axis of the second region 120 (not shown) It is usually 0° to 5°, preferably 0° to 4°, preferably 0° to 3°, and particularly preferably 0° to 1°. As such, the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis of the first region 110 are generally parallel or nearly parallel as viewed in the thickness direction A3. Further, the in-plane slow axis A1 of the optically anisotropic layer 100 and the in-plane slow axis of the second region 120 are generally parallel or nearly parallel as viewed from the thickness direction A3. In this case, the direction dependence of the retardation of the optically anisotropic layer 100 in the oblique direction can be effectively suppressed.

(1.4. Description of in-plane delay)

The retardation of the optically anisotropic layer 100 is usually set in an appropriate range in accordance with the use of the optical anisotropic body 10.

For example, the in-plane retardation of the optically anisotropic layer 100 at a measurement wavelength of 550 nm may be 100 nm or more and 180 nm or less. The optically anisotropic layer 100 having the in-plane retardation in such a range can function as a quarter-wavelength plate. More specifically, the optically anisotropic layer 100 functioning as a quarter-wavelength plate has an in-plane retardation at a measurement wavelength of 550 nm, preferably 100 nm or more, more preferably 110 nm or more, and 120 or more. Above nm is preferred, and preferably 180 nm or less, preferably 170 nm or less, and preferably 160 nm or less.

For example, the in-plane retardation of the optically anisotropic layer 100 at a measurement wavelength of 550 nm may be 240 nm or more and 320 nm or less. The optically anisotropic layer 100 having the in-plane retardation in such a range functions as a 1/2 wavelength plate. More specifically, the optically anisotropic layer 100 functioning as a half-wavelength plate can exhibit an in-plane retardation at a measurement wavelength of 550 nm, preferably 240 nm or more, more preferably 250 nm or more, and 260. Above nm is preferred, and preferably 320 nm or less, preferably 310 nm or less, and preferably 300 nm or less.

The in-plane retardation of the optically anisotropic layer 100 may be reverse wavelength dispersion or may be forward wavelength dispersion. The in-plane retardation of the inverse wavelength dispersion means that the in-plane retardation Re (450) at a wavelength of 450 nm and the in-plane retardation Re (550) at a wavelength of 550 nm satisfy the in-plane retardation of the following formula (N3). Further, the in-plane retardation of the wavelength-dependent dispersion means that the in-plane retardation Re (450) and Re (550) satisfy the in-plane retardation of the following formula (N4). Among them, in the viewpoint of allowing the reflection suppressing ability to be exhibited in a wide wavelength range, the in-plane retardation of the optical anisotropic layer 100 is preferably reverse wavelength dispersion.
Re(450)/Re(550)<1.00 (N3)
Re(450)/Re(550)>1.00 (N4)

The in-plane retardation of the first region 110 is preferably a value above a specified value. Since the in-plane retardation of the first region 110 is greater than or equal to a predetermined value, the direction-dependent offset of the delay between the first region 110 and the second region 120 can be effectively performed. Specifically, the in-plane retardation of the first region 110 at a measurement wavelength of 550 nm is usually 30 nm or more. Furthermore, the in-plane retardation of the first region 110 is preferably in a range in which the in-plane retardation of the optically anisotropic layer 100 is more suitable.

For example, in the case where the optically anisotropic layer 100 has an in-plane retardation capable of functioning as a quarter-wavelength plate, the in-plane retardation of the first region 110 at a wavelength of 550 nm is measured, and is 30 nm or more. Preferably, it is preferably 40 nm or more, and more preferably 50 nm or more. By having such a large in-plane retardation of the first region 110, the direction-dependent offset of the delay between the first region 110 and the second region 120 can be effectively performed. According to this, the direction dependence of the retardation of the optically anisotropic layer 100 in the oblique direction can be effectively suppressed. The upper limit of the in-plane retardation of the first region 110 at a wavelength of 550 nm can be set so that the in-plane retardation of the optically anisotropic layer 100 falls within a desired range, preferably 120 nm or less, and 110 nm or less. Preferably, it is preferably 95 nm or less.

For example, in the case where the optically anisotropic layer 100 has an in-plane retardation capable of functioning as a 1/2 wavelength plate, the in-plane retardation of the first region 110 at a wavelength of 550 nm is measured, and is 60 nm or more. Preferably, it is preferably 80 nm or more, and more preferably 100 nm or more. By having such a large in-plane retardation of the first region 110, the direction-dependent offset of the delay between the first region 110 and the second region 120 can be effectively performed. According to this, the direction dependence of the retardation of the optically anisotropic layer 100 in the oblique direction can be effectively suppressed. The upper limit of the in-plane retardation of the first region 110 at a wavelength of 550 nm can be set such that the in-plane retardation of the optically anisotropic layer 100 falls within a desired range, preferably 240 nm or less, and 220 nm or less. Preferably, it is preferably 190 nm or less.

The in-plane retardation of the first region 110 may be reverse wavelength dispersion or may be forward wavelength dispersion. Among them, from the viewpoint of obtaining the optical anisotropic layer 100 having the in-plane retardation of the inverse wavelength dispersion, the in-plane retardation of the first region 110 is preferably reverse wavelength dispersion.

The in-plane retardation of the second region 120 is preferably a value above a specified value. Since the in-plane retardation of the second region 120 is greater than or equal to a predetermined value, the direction-dependent offset of the delay between the first region 110 and the second region 120 can be effectively performed. Specifically, the in-plane retardation of the second region 120 at a measurement wavelength of 550 nm is usually 30 nm or more. Furthermore, the in-plane retardation of the second region 120 is preferably in a range in which the in-plane retardation of the optically anisotropic layer 100 is more suitable. Specifically, the in-plane retardation of the second region 120 measuring the wavelength of 550 nm is preferably in the same range as the range of the in-plane retardation which has been described as the first region 110 at the measurement wavelength of 550 nm. Furthermore, both the in-plane retardation of the first region 110 and the in-plane retardation of the second region 120 are in the same range as the range of the in-plane retardation that has been described as the first region 110 at the measurement wavelength of 550 nm. good. Thereby, the offset of the direction dependence of the delay between the first region 110 and the second region 120 can be effectively performed.

The in-plane retardation of the second region 120 may be reverse wavelength dispersion or may be forward wavelength dispersion. Among them, in terms of obtaining the optical anisotropic layer 100 having an in-plane retardation of inverse wavelength dispersion, the in-plane retardation of the second region 120 is preferably reverse wavelength dispersion.

In the measurement wavelength of 550 nm, the difference between the in-plane retardation of the first region 110 and the in-plane retardation of the second region 120 is preferably small. Specifically, the difference is preferably 100 nm or less, preferably 50 nm or less, more preferably 30 nm or less, and particularly preferably 10 nm or less. By the difference being so small, the offset of the direction dependence of the delay between the first region 110 and the second region 120 can be effectively performed.

(1.5. Description of Characteristics of Optically Anisotropic Layer)

The direction dependence of the retardation of the optically anisotropic layer 100 in the oblique direction is suppressed. According to this, the difference between the maximum value and the minimum value in the azimuthal direction of the retardation ratio R (50°) / R (0°) of the optical anisotropic layer 100 can be reduced. The difference between the maximum value and the minimum value of the retardation ratio R (50°)/R(0°) in the azimuthal direction indicates the degree of dependence of the retardation of the optically anisotropic layer 100 in the oblique direction. Specifically, the difference between the maximum value and the minimum value of the retardation ratio R (50°)/R(0°) of the optically anisotropic layer 100 in the azimuthal direction is preferably 0.20 or less, and preferably 0.10 or less. It is preferably 0.05 or less, and is preferably 0.00.

The aforementioned R (50°) indicates the retardation of the optically anisotropic layer 100 at an incident angle of 50°. Also, R (0°) represents the retardation of the optically anisotropic layer 100 at an incident angle of 0°. In general, the retardation ratio R (50°) / R (0°) becomes maximum in the orientation perpendicular to one of the in-plane slow axis A1 and the in-plane fast axis A2 of the optical anisotropic layer 100, in the optical direction. The vertical orientation of the other of the in-plane slow axis A1 and the in-plane fast axis A2 of the opposite layer 100 is minimized. Accordingly, by measuring the difference between the delay ratios R(50°)/R(0°) between the azimuths, the delay ratio R(50°)/R(0°) can be obtained in the azimuthal direction. The difference between the maximum and minimum values.

From the viewpoint of achieving excellent viewing angle characteristics, it is preferable that the average retardation ratio R (±50°)/R(0°) of the optically anisotropic layer 100 is close to 1.00, and the average retardation of the optical anisotropic layer 100 is preferable. The ratio R (±50°)/R(0°) is a direction perpendicular to the slow axis A1 with respect to the in-plane of the optical anisotropic layer 100 and is faster than the in-plane of the optically anisotropic layer 100. The measured direction of the measurement direction of at least one of the vertical measurement directions of the axis A2. Specifically, the average retardation ratio R (±50°)/R(0°) is preferably 0.90 or more, more preferably 0.95 or more, and most preferably 1.10 or less, and preferably 1.05 or less. R (±50°) represents an average value of retardation R (-50°) and R (+50°) of the optically anisotropic layer 100 at an incident angle of -50° and +50°. Further, R (0°), as described above, indicates the retardation of the optically anisotropic layer 100 at an incident angle of 0°.

Generally, the external light incident on the display surface of the image display device at the incident angle "+φ" is reflected at the exit angle "-φ". According to this, in the case where the polarizing plate provided on the display surface includes the optical anisotropic body, the external light is included in the outward angle of the incident angle "+φ" and the exit angle "-φ" in the oblique direction of the display surface. The path of the return path passes through the optically anisotropic layer 100. By the average retardation ratio R (±50°)/R(0°) of the optically anisotropic layer 100 being in the aforementioned range close to 1.00, a polarizing plate containing an optical anisotropic body can be utilized, and the tilting direction can be effectively suppressed. Reflection of external light. Specifically, when the external light passes through the optically anisotropic layer 100 twice during the incident and at the time of reflection, the polarization state is appropriately changed, and it is possible to realize effective shielding of the linear polarizer using the polarizing plate. Therefore, when such an optical anisotropic body is combined with a linear polarizer to obtain a polarizing plate, the reflection suppressing ability by the polarizing plate can be exhibited over a wide range of incident angles, and thus excellent viewing angle characteristics can be obtained.

Furthermore, the average retardation ratio R (±50°)/R(0°) measured in the direction perpendicular to the slow axis A1 with respect to the plane of the optical anisotropic layer 100 and in relation to optics The average retardation ratio R (±50°)/R(0°) measured in the direction in which the in-plane fast axis A2 of the anisotropic layer 100 is perpendicular is preferably in the aforementioned range close to 1.00. In general, the average retardation ratio of the optically anisotropic layer 100 is R (±50°)/R(0°), which is in the direction of measurement perpendicular to the slow axis A1 of the plane of the optical anisotropic layer 100. It becomes one of the smallest or largest, and becomes the smallest or largest in the measurement direction of the orientation perpendicular to the fast axis A2 in the plane of the optical anisotropic layer 100. Accordingly, the average retardation ratio of the optically anisotropic layer 100 is R (±50°) in both the measurement direction perpendicular to the in-plane slow axis A1 and the measurement direction perpendicular to the in-plane fast axis A2. When /R(0°) is in the range of approximately 1.00, the average retardation ratio R (±50°)/R(0°) of the optically anisotropic layer 100 can be regarded as a value close to 1.00 in all orientations. Therefore, the direction dependence of the reflection suppression ability can be effectively suppressed.

(1.6. Description of thickness)

The thickness of the first region 110 and the thickness of the second region 120 are independent, preferably 0.1 μm or more, more preferably 0.3 μm or more, and most preferably 9 μm or less, and preferably 5 μm or less. By the thickness of the first region 110 and the thickness of the second region 120 being within the above range, characteristics such as in-plane retardation can be easily adjusted to a desired range.

The thickness of the optically anisotropic layer 100 is preferably 0.5 μm or more, more preferably 1.0 μm or more, and most preferably 200 μm or less, and preferably 100 μm or less. Since the optically anisotropic layer 100 having such a thickness is thinner than the conventional retardation film used for the polarizing plate for the reflection suppressing film of the organic EL display panel, it is possible to contribute to the reduction in thickness of the organic EL display panel.

(1.7. Characteristics and shape of optical anisotropic body)

The optical anisotropic body 10 is preferably excellent in transparency. Specifically, the total optical transmittance of the optical anisotropic body 10 is preferably 80% or more, more preferably 85% or more, and particularly preferably 88% or more. Further, the optical anisotropic body 10 preferably has a haze of 5% or less, more preferably 3% or less, and particularly preferably 1% or less. The total light transmittance can be measured in the range of wavelengths from 400 nm to 700 nm using an ultraviolet-visible spectrometer. Also, the haze can be measured using a haze meter.

The shape of the optical anisotropic body 10 is arbitrary, but it is preferably a film shape. In this case, the optical anisotropic body 10 can be used as a retardation film in terms of the in-plane retardation of the optically anisotropic layer 100.

(1.8. Manufacturing method)

The method for producing the optical anisotropic body 10 is not particularly limited. For example, the optical anisotropic body 10 can be manufactured by a manufacturing method including the following steps:
(i) a step of preparing a layer body (hereinafter referred to as "liquid crystal composition layer") formed of a liquid crystal composition containing a liquid crystal compound;
(ii) a step of bonding the liquid crystal composition layer; and (iii) a step of curing the bonded liquid crystal composition layer.

In the step (i), a liquid crystal composition layer is usually formed by passing through a liquid crystal composition on a suitable supporting surface. As the support surface, any surface that can support the liquid crystal composition layer is used. As the support surface, from the viewpoint of optimizing the surface state of the optically anisotropic layer, it is preferable to use a flat surface having no concave portion and convex portion. Further, from the viewpoint of improving the productivity of the optically anisotropic layer, it is preferable to use the surface of the long substrate as the support surface. Here, the term "long strip" means a shape having a length of 5 times or more with respect to the width of the spoke, and preferably has a length of 10 times or more, and specifically means that it can be wound into a roll for storage or handling. The shape of the film to the extent of the length.

As the substrate, a resin film or a glass plate is usually used. In particular, when the orientation treatment is carried out at a high temperature, it is preferred to select a substrate which can withstand this temperature. As the resin, a thermoplastic resin is usually used. Among them, from the viewpoint of high orientation restraining power, high mechanical strength, and low cost, it is preferred that the resin be a resin having a positive intrinsic birefringence value. In addition, in terms of transparency, low moisture absorption, dimensional stability, and light weight, it is preferred to use a resin containing an alicyclic structure-containing polymer such as a norbornene-based resin. A suitable example of the resin contained in the base material by the name of the product is "ZEONOR" manufactured by Nihon Corporation, which is a norbornene-based resin.

In order to promote the orientation of the molecules of the liquid crystalline compound in the liquid crystal composition layer on the surface of the substrate as the support surface, it is preferable to apply a treatment for imparting the orientation regulating force. The orientation limiting force refers to the "surface property" of orienting the molecules of the liquid crystalline compound contained in the liquid crystal composition. Examples of the treatment for imparting the orientation regulating force to the support surface include a light directing treatment, a rubbing treatment, an oriented film forming treatment, an ion beam orientation treatment, an extension treatment, and the like.

In the step (i) of forming the liquid crystal composition layer, the liquid crystal composition is usually prepared in a fluid state. Therefore, the liquid crystal composition is usually applied to the support surface to form a liquid crystal composition layer. Examples of the method of applying the liquid crystal composition include a curtain coating method, an extrusion coating method, a roll coating method, a spin coating method, a dip coating method, a bar coating method, a spray coating method, a slant coating method, a printing coating method, and a gravure coating method. Coating method, mold coating method, gap coating method and dipping method.

After the liquid crystal composition layer is formed, the step (iv) of orienting the molecules of the liquid crystal compound contained in the liquid crystal composition layer may be performed as needed. When orientation is performed, it is usually determined how long the liquid crystal composition layer is maintained under specified temperature conditions. Thereby, the molecular orientation of the liquid crystalline compound is in the liquid crystal composition layer.

Generally, in the in-plane direction, molecules of the liquid crystalline compound are oriented in a direction corresponding to the orientation limiting force of the support surface. Further, when the conditions are appropriate, the molecules of the liquid crystalline compound are oriented in such a manner that at least a portion thereof is inclined with respect to the in-plane direction (that is, with respect to the plane of the layer) in the thickness direction. As a method of appropriately adjusting the above conditions, a method of appropriately adjusting the composition of the liquid crystal composition, and "having a direction in which the molecules of the liquid crystal compound are inclined with respect to the in-plane direction (that is, with respect to the plane of the layer plane) are used. A method of directionalally limiting the support surface, a method of applying a magnetic field, and a method of appropriately adjusting the temperature condition at the time of orientation. As such a method, for example, Japanese Patent No. 5363022, International Patent Publication No. 2018/173778 (or Japanese Patent Application No. 2017-060122), Japanese Patent Publication No. 2018-163218 (or Japanese Patent) Japanese Patent Publication No. 2018-162379 (or Japanese Patent Application No. 2017-060154), and International Patent Publication No. 2018/173773 (or Japanese Patent Application No. 2017-060159) Methods.

Among them, a method of appropriately adjusting the temperature condition at the time of orientation is preferred. In this method, the orientation is carried out in such a manner that the temperature of the liquid crystal composition layer is the same as the temperature of the residual component of the test composition of 800 cP (centipoise) or less. The aforementioned test composition is a composition having a composition excluding a polymerization initiator from the liquid crystal composition. Further, the residual component viscosity of the test composition is the viscosity of the residual component of the test composition under the same temperature conditions as the liquid crystal composition layer at the time of orientation. In addition, the residual component of the test composition is a component which is not vaporized and remains in the liquid crystal composition layer at the same temperature as the component contained in the test composition. By orienting in such a manner as to satisfy such a requirement, the molecules of the liquid crystalline compound contained in the liquid crystal composition layer can be oriented in such a manner as to be largely inclined with respect to the in-plane direction (that is, with respect to the plane of the layer).

The residual component viscosity of the test composition can be measured by the following method under the same temperature conditions as the liquid crystal composition layer at the time of orientation.

A test composition in which the polymerization initiator was excluded from the liquid crystal composition was prepared. This test composition was concentrated under reduced pressure on a rotary evaporator to remove the solvent to obtain a residue. For this residual component, the viscosity is measured while measuring the temperature change to obtain information on the measured temperature and the viscosity at the measured temperature. The following information is appropriately referred to as "temperature-viscosity information". From this "temperature-viscosity information", the viscosity at the temperature of the liquid crystal composition layer at the time of orientation is understood as the residual component viscosity.

The method of setting the residual component viscosity of the test composition to the above range under the same temperature conditions as the liquid crystal composition layer at the time of orientation includes, for example, a method of appropriately adjusting the temperature of the liquid crystal composition layer at the time of orientation. In this method, it is usually adjusted such that the temperature of the liquid crystal composition layer is sufficiently high to reduce the residual component viscosity of the test composition at the same temperature as the temperature to be in the above range.

In the step (iv) of orienting the molecules of the liquid crystal compound, the temperature of the liquid crystal composition layer is maintained at a predetermined temperature condition, and can be arbitrarily set within a range in which the desired optical anisotropic layer 100 can be obtained, for example, : 30 seconds to 5 minutes.

The liquid crystal composition layer is prepared, and after the molecules of the liquid crystal compound are oriented as needed, the step (ii) of laminating the liquid crystal composition layer is performed. In the case where the optically anisotropic layer 100 formed of the liquid crystal composition as a whole is obtained as in the embodiment shown in the present embodiment, the bonding of the liquid crystal composition layer is directly performed. The bonding of the liquid crystal composition layers is "direct", which means that there is no other layer between the liquid crystal composition layers to be bonded.

In the above-mentioned bonding, for example, after one liquid crystal composition layer is prepared, the liquid crystal composition layer may be bent and bonded. In this case, the liquid crystal composition layer on one side of the fold line corresponds to the first region 110, and the liquid crystal composition layer on the other side of the fold line corresponds to the second region 120.

Further, in the bonding, for example, after the plurality of liquid crystal composition layers are prepared, the liquid crystal composition layers may be bonded together. In this case, at least one liquid crystal composition layer corresponds to the first region 110, and at least one liquid crystal composition layer corresponds to the second region 120.

After the liquid crystal composition layer is bonded, the step (iii) of curing the liquid crystal composition layer to obtain the optically anisotropic layer 100 as a liquid crystal cured layer is performed. In the step (iii), a part or all of the liquid crystalline compound is usually polymerized to cure the liquid crystal composition layer. By solidifying in this way, the liquid crystal composition layers are bonded to each other at the interface of the bonded liquid crystal composition layer. Therefore, the optically anisotropic layer 100 can be obtained as a liquid crystal cured layer containing the first region 110 and the second region 120 as regions where the liquid crystal composition layer is cured. At the time of polymerization, the liquid crystalline compound generally maintains its molecular orientation state and directly polymerizes. According to this, the orientation state of the liquid crystalline compound contained in the liquid crystal composition before polymerization is usually fixed by the above polymerization.

As the polymerization method, a method suitable for the properties of the components contained in the liquid crystal composition is selected. Examples of the polymerization method include a method of irradiating an active energy ray and a thermal polymerization method. Among them, since the polymerization reaction can be carried out at room temperature without heating, it is preferred to irradiate the active energy ray. Here, the active energy ray to be irradiated includes light rays such as visible light, ultraviolet rays, and infrared rays, and arbitrary energy lines such as electron beams.

Among them, in terms of ease of handling, it is preferred to irradiate light such as ultraviolet rays. The temperature at the time of ultraviolet irradiation is preferably at most the glass transition temperature of the substrate, preferably 150 ° C or lower, preferably 100 ° C or lower, and particularly preferably 80 ° C or lower. The lower limit of the temperature at the time of ultraviolet irradiation is set to 15 ° C or more. The irradiation intensity of ultraviolet rays is preferably 0.1 mW/cm ² or more, more preferably 0.5 mW/cm ² or more, more preferably 10000 mW/cm ² or less, and preferably 5,000 mW/cm ² or less. The irradiation amount of the ultraviolet rays is preferably 0.1 mJ/cm ² or more, more preferably 0.5 mJ/cm ² or more, more preferably 10000 mJ/cm ² or less, and more preferably 5,000 mJ/cm ² or less.

In the manufacturing method according to the above example, the liquid crystal composition layer included in the optically anisotropic layer 100 is first cured, but the cured state is not limited to this example. For example, a portion of the liquid crystal composition layer corresponding to the first region 110 may be cured first, or a portion of the liquid crystal composition layer corresponding to the second region 120 may be cured first. For example, it can also include:
(v) a step of preparing a layer body formed by a cured product of the liquid crystal composition,
(vi) a step of directly forming a liquid crystal composition layer on the surface of the layer body,
(vii) a step of bonding the liquid crystal composition layer and (viii) a method of producing a step of curing the bonded liquid crystal composition layer. In the following description, in order to distinguish the liquid crystal cured layer as the optically anisotropic layer 100 as a whole, the layer formed by the cured product of the liquid crystal composition prepared in the step (v) is referred to as "first unit curing". Floor". Here, the aspect in which another layer is formed on the surface of a certain layer is "direct", and means that there is no other layer between the two layers.

The step (v) usually includes a step of forming a liquid crystal composition layer through the liquid crystal composition on a suitable supporting surface, a step of orienting the molecules of the liquid crystal compound contained in the liquid crystal composition layer, and curing the liquid crystal composition layer. The step of obtaining the first unit cured layer. The specific operations in these processes can be the same as the above steps (i), (iv) and (iii). By this step (v), the first unit cured layer formed by the cured product of the liquid crystal composition can be obtained. The molecules of the liquid crystalline compound contained in the first unit cured layer are generally oriented in one direction in the in-plane direction. Further, the molecules of the liquid crystalline compound contained in the first unit cured layer are generally oriented in a thickness direction thereof in such a manner that at least a portion thereof is inclined with respect to the in-plane direction (that is, with respect to the plane of the layer).

After the first unit cured layer is prepared, the step (vi) of directly forming the liquid crystal composition layer is performed on the surface of the first unit cured layer. By this step, a liquid crystal composition layer was prepared as a layer body formed on the first unit solidified layer. The formation of the liquid crystal composition layer is usually performed by coating a liquid crystal composition on the surface of the first unit cured layer. The coating method may also use the same method as that described in the item of the step (i). Before the liquid crystal composition is applied, a treatment such as a rubbing treatment or the like for imparting an orientation restricting force may be applied to the surface of the first unit cured layer. However, the surface of the first unit cured layer generally has an orientation restricting force for appropriately orienting molecules of the liquid crystalline compound contained in the liquid crystal composition layer formed on the surface, even without special treatment. Accordingly, in the viewpoint of reducing the number of steps to efficiently manufacture, the step (vi) preferably does not apply a rubbing treatment to the surface of the first unit cured layer.

After the liquid crystal composition layer is formed on the surface of the first unit cured layer, the step (ix) of orienting the molecules of the liquid crystal compound contained in the liquid crystal composition layer may be performed as needed. The specific operation in this step (ix) can be the same as the above step (iv). Thereby, the molecular orientation of the liquid crystalline compound is in the liquid crystal composition layer. Generally, in the in-plane direction, the molecules of the liquid crystalline compound contained in the liquid crystal composition layer are oriented along the liquid crystal compound contained in the first unit cured layer by the orientation restricting force of the surface of the first unit cured layer. Oriented in the same direction. On the other hand, in the thickness direction, the molecules of the liquid crystalline compound contained in the liquid crystal composition layer are oriented so that at least a part thereof is inclined with respect to the in-plane direction (that is, with respect to the plane of the layer). In particular, the first unit cured layer containing a liquid crystal compound (hereinafter referred to as "inverse dispersion liquid crystal compound") which exhibits birefringence of reverse wavelength dispersion can function as an alignment film which enables The molecules of the inverse dispersion liquid crystalline compound contained in the liquid crystal composition layer formed on the surface of the first unit cured layer are largely inclined with respect to the in-plane direction (that is, with respect to the plane of the layer). Accordingly, the optically anisotropic layer 100 in which the first slow axis A110 and the second slow axis A120 are large with respect to the in-plane direction A6 (that is, with respect to the plane of the layer plane) at an angle θ1 and θ2 can be easily obtained.

After the liquid crystal composition layer is prepared and the molecules of the liquid crystal compound are oriented as required, the step (vii) of laminating the liquid crystal composition layer is performed. This fit is usually done directly.

In the above-mentioned bonding, for example, after the intermediate film having the first unit cured layer and the liquid crystal composition layer formed on the first unit cured layer is prepared, the intermediate film may be bent and pasted. Hehe. In this case, the first unit solidified layer and the liquid crystal composition layer on one side of the fold line correspond to the first region 110, and the first unit solidified layer and the liquid crystal composition layer on the other side of the fold line correspond to the second region. 120.

Further, in the bonding, for example, after the two intermediate films having the first unit cured layer and the liquid crystal composition layer formed on the first unit cured layer are prepared, the liquid crystal may be composed of The layers are attached. In this case, the first unit cured layer and the liquid crystal composition layer of one of the intermediate films correspond to the first region 110, and the first unit cured layer and the liquid crystal composition layer of the intermediate film of the other corresponds to the second region. 120.

After the bonding of the liquid crystal composition layers, the step (viii) of curing the liquid crystal composition layer to obtain the optically anisotropic layer 100 as a liquid crystal cured layer is performed. In the following description, in order to distinguish from the entire liquid crystal cured layer as the optically anisotropic layer 100 and the first unit cured layer, the layer formed by solidifying the liquid crystal composition layer formed on the first unit cured layer is referred to as " The second unit is cured." The specific operation in this step (viii) can be the same as the step (iii). Thereby, the liquid crystal composition layers are bonded to each other at the interface of the liquid crystal composition layer. Therefore, the optically anisotropic layer 100 can be obtained as a liquid crystal cured layer, the liquid crystal cured layer comprising: a first region 110 as a layer body including a first unit cured layer and a second unit cured layer, and as a first unit included a second region 120 of the layer of the cured layer and the second unit cured layer.

The optically anisotropic layer 100 can be obtained by the above manufacturing method. Therefore, the optical anisotropic body 10 can be obtained by a method including the production of the optically anisotropic layer 100 by the above-described manufacturing method. This manufacturing method may further include any step in combination with the above steps.

In the above production method, the optical anisotropic body 10 including the substrate is usually obtained. Thus, for example, the above manufacturing method may also include a step of peeling off the substrate. Thereby, the optically anisotropic layer 100 itself can be obtained as the optical anisotropic body 10.

Further, the above-described manufacturing method may include, for example, a step of transferring the optically anisotropic layer 100 provided on the substrate to an arbitrary thin film layer. According to this, for example, the method of manufacturing the optical anisotropic body 10 may further include: after bonding the optically anisotropic layer 100 formed on the substrate to any of the film layers, the substrate is peeled off as needed to obtain The step of including the optically anisotropic layer 100 and the optical anisotropic body 10 of any thin film layer. In this case, a suitable adhesive or bonding agent can also be used for the bonding.

Further, the above production method may be, for example, a step of further providing an arbitrary layer body to the obtained optical anisotropic body 10.

[2. Second embodiment of optical anisotropic body]

In the first embodiment, the optical anisotropic body 10 including the optically anisotropic layer 100 composed only of the cured product of the liquid crystal composition has been described. However, the optical anisotropic body is not limited to only A cured product of a liquid crystal composition is formed. Examples are disclosed below to illustrate this embodiment.

Fig. 8 is a perspective view showing an optical anisotropic body 20 according to a second embodiment of the present invention. 9 is a schematic cross-sectional view showing an optically anisotropic layer 200 of the optical anisotropic body 20 according to the second embodiment of the present invention. In FIG. 9, it is disclosed that the optically anisotropic layer 200 is cut in a plane parallel to both the in-plane slow axis A1 (refer to FIG. 8) and the thickness direction A3 (refer to FIG. 8) of the optical anisotropic layer 200. Section 200S. Further, in the optical anisotropic body 20 according to the second embodiment, the same portions as those of the optical anisotropic body 10 according to the first embodiment will be denoted by the same reference numerals.

As shown in FIG. 8 and FIG. 9, the optical anisotropic body 20 according to the second embodiment of the present invention comprises, in addition to the optically anisotropic layer 200, a liquid crystal composition between the first region 110 and the second region 120. The optical anisotropic body 10 related to the first embodiment is provided in the same manner as the non-liquid crystal region 230 formed of a material other than the cured product. The first region 110, the second region 120, and the non-liquid crystal region 230 are layered regions in which the in-plane direction A6 of the optically anisotropic layer 200 is parallel (that is, parallel to the plane of the layer). Further, the first region 110, the second region 120, and the non-liquid crystal region 230 are located at different positions in the thickness direction A3 of the optical anisotropic layer 200. Such an optical anisotropic body 20 has the same characteristics as the optical anisotropic body 10 according to the first embodiment, and exhibits the same effects as the optical anisotropic body 10 according to the first embodiment.

Examples of the material of the non-liquid crystal region 230 include glass, resin, and the like. Further, the material of the non-liquid crystal region 230 may be one type or two or more types. Among them, the material of the non-liquid crystal region 230 is preferably a resin, and particularly preferably a resin used as a binder or a bonding agent. The production of the optical anisotropic body 20 can be easily performed by using such an adhesive or a bonding agent.

The non-liquid crystal region 230 may also be a region having optical anisotropy of in-plane retardation, but is preferably an optically isotropic region having substantially no in-plane retardation. By the non-liquid crystal region 230 being an optically isotropic region, the effect of "the direction dependence of the retardation of the entire optically anisotropic layer 200 can be suppressed" can be more effectively exhibited.

In the case where the non-liquid crystal region 230 is an optically isotropic region, the specific in-plane retardation of the non-liquid crystal region 230 at a wavelength of 550 nm is preferably 10 nm or less, preferably 5 nm or less. Below 3 nm is especially good.

The method for producing the optical anisotropic body 20 is not particularly limited. For example, the optical anisotropic body 20 having the non-liquid crystal region 230 formed of a binder or a bonding agent can be manufactured by a manufacturing method including the following steps:
(x) a step of preparing a liquid crystal cured layer formed of a cured product of a liquid crystal composition containing a liquid crystal compound; and (xi) a step of bonding a liquid crystal cured layer.

The step (x) usually includes a step of forming a liquid crystal composition layer through the liquid crystal composition on a suitable supporting surface, a step of orienting the molecules of the liquid crystal compound contained in the liquid crystal composition layer, and curing the liquid crystal composition layer. A process of obtaining a liquid crystal cured layer. The specific operations in these processes may be the same as the steps (i), (iv) and (iii) which have been described in the first embodiment. By this step (x), a liquid crystal cured layer formed by a cured product of the liquid crystal composition can be obtained. The molecules of the liquid crystalline compound contained in the liquid crystal cured layer are usually oriented in one direction in the in-plane direction. Further, the molecules of the liquid crystalline compound contained in the liquid crystal cured layer are generally oriented in such a manner that at least a portion thereof is inclined with respect to the in-plane direction (that is, with respect to the plane of the layer) in the thickness direction thereof.

Further, the step (x) may include a step of preparing the first unit cured layer, a step of directly forming a liquid crystal composition layer on the surface of the first unit cured layer, and a liquid crystal compound contained in the liquid crystal composition layer as needed. The step of molecular orientation and the step of curing the liquid crystal composition layer to obtain a liquid crystal cured layer. The specific operations in these processes may be the same as those described in the first embodiment (v), (vi), (ix) and (iii). By this step (x), a liquid crystal cured layer containing the first unit cured layer and the second unit cured layer can be obtained. According to the combination of the first unit cured layer and the second unit cured layer, in the case of using an inverse dispersion liquid crystalline compound, as explained in the first embodiment, the first slow axis A110 and the second slow can be easily obtained. The angle θ1 and θ2 of the axis A120 with respect to the in-plane direction A6 (that is, with respect to the plane of the layer) are large optical anisotropic layers 200.

After the liquid crystal cured layer is prepared, the step of bonding the liquid crystal cured layer is performed. This bonding is carried out using a bonding agent or a binder.

In the above-mentioned bonding, for example, after one liquid crystal curing layer is prepared, the liquid crystal cured layer may be bent and bonded. In this case, an optically anisotropic layer 200 having a first region 110 as a liquid crystal cured layer on one side of the fold line and a second region 120 as a liquid crystal cured layer on the other side of the fold line may be obtained. And a non-liquid crystal region 230 between the layers as a bonding agent or adhesive.

Further, in the bonding, for example, after the plurality of liquid crystal cured layers are prepared, the liquid crystal cured layers may be bonded together. In this case, the optically anisotropic layer 200 is provided, comprising: at least one first region 110 as a liquid crystal cured layer, and at least one second region 120 as a liquid crystal cured layer, and a relationship between the two A non-liquid crystal region 230 of the layer of the bonding agent or adhesive.

The optically anisotropic layer 200 can be obtained by the above manufacturing method. Therefore, the optical anisotropic body 20 can be obtained by a method including manufacturing the optical anisotropic layer 200 by the above-described manufacturing method. This manufacturing method may further include any step in combination with the above steps. As an arbitrary process, the process demonstrated by the 1st Embodiment is mentioned, for example.

[3. Other embodiments of optical anisotropic bodies]

The optical anisotropic body may be further modified from the first embodiment and the second embodiment described above.

In the first embodiment, an example in which a liquid crystal cured layer including only the first region 110 and the second region 120 is used as the optical anisotropic layer 100 is disclosed, but as an optical anisotropic layer 100, for example. The liquid crystal cured layer may also include any region combined with the first region 110 and the second region 120. Any region included in the "liquid crystal cured layer as the optically anisotropic layer 100" may be, for example, a region in which molecules of the liquid crystal compound have been oriented in the thickness direction.

Further, in the first embodiment and the second embodiment, an example of the optically anisotropic layers 100 and 200 including only one set of the first region 110 and the second region 120 is disclosed, but for example, The optically anisotropic layers 100 and 200 may include two or more sets of the first region 110 and the second region 120.

Furthermore, the optical anisotropic bodies 10 and 20 may further include any layer body combined with the optically anisotropic layers 100 and 200. Examples of the optional layered body include a substrate used for the production of the optically anisotropic layers 100 and 200, a retardation film, a base pad layer for optimizing the smoothness of the film, and a hard layer such as an impact-resistant polymethacrylic resin layer. Coating; anti-reflective layer; anti-fouling layer;

[4. Liquid crystal composition]

The liquid crystal composition is a material containing a liquid crystal compound. This liquid crystal composition contains not only a material containing two or more kinds of components but also a material containing only one liquid crystal compound. The first region and the second region of the optically anisotropic layer are formed by a cured product of the liquid crystal composition. The liquid crystal composition used for the formation of the first region may be the same as or different from the liquid crystal composition used for the formation of the second region. Therefore, the components such as the liquid crystal compound contained in the first region may be the same as or different from the components such as the liquid crystal compound contained in the second region. Further, in the case where the first region and the second region are formed by a plurality of layer bodies such as the first unit cured layer and the second unit cured layer, the liquid crystal composition formed using the plurality of layers is used. The objects can be the same or different. Therefore, the components such as the liquid crystal compound contained in the plurality of layer bodies may be the same or different.

The liquid crystalline compound is a compound having a liquid crystal property, and usually exhibits a liquid crystal phase when the liquid crystalline compound is oriented. The liquid crystalline compound preferably has polymerizability. Therefore, the liquid crystalline compound preferably contains a polymerizable group such as an acrylonitrile group, a methacryl fluorenyl group or an epoxy group in its molecule. The polymerizable liquid crystalline compound can be polymerized in a state in which a liquid crystal phase is present, and the orientation state of molecules held in the liquid crystal phase directly becomes a polymer. According to this, the orientation state of the liquid crystal compound can be fixed in the cured product of the liquid crystal composition, and the degree of polymerization of the liquid crystal compound can be improved to improve the mechanical strength of the optically anisotropic layer.

The molecular weight of the liquid crystal compound is preferably 300 or more, more preferably 500 or more, still more preferably 800 or more, and most preferably 2,000 or less, more preferably 1700 or less, still more preferably 1,500 or less. By using a liquid crystalline compound having a molecular weight in such a range, the coatability of the liquid crystal composition can be optimized.

The birefringence Δn of the liquid crystal compound having a wavelength of 550 nm is preferably 0.01 or more, preferably 0.03 or more, more preferably 0.15 or less, and most preferably 0.10 or less. By using a liquid crystalline compound having a birefringence Δn in such a range, an optically anisotropic layer having less orientation defects is generally easily obtained.

The birefringence of the liquid crystalline compound can be measured by, for example, the following method.

A layer of the liquid crystalline compound is produced to uniformly orient the liquid crystalline compound contained in the layer. Thereafter, the in-plane retardation of this layer is measured. Then, the birefringence of the liquid crystalline compound can be determined from "(in-plane retardation of the layer) ÷ (thickness of the layer)". In this case, in order to facilitate the measurement of the in-plane retardation and the thickness, the layer of the liquid crystal compound which has been uniformly oriented may be cured.

The liquid crystal compound may be used singly or in combination of two or more kinds in any ratio. Further, as the liquid crystal compound, an inverse dispersion liquid crystal compound which exhibits birefringence of reverse wavelength dispersion can be used, and a cis-dispersion liquid crystal compound which exhibits birefringence of a wavelength-dispersive dispersion can be used, and an inverse dispersion liquid crystal can also be used. A combination of a compound and a cis-dispersing liquid crystalline compound. The liquid crystal compound which exhibits the birefringence of the reverse wavelength dispersion property refers to a liquid crystal which exhibits birefringence of reverse wavelength dispersion when the liquid crystal compound is oriented in the layer body in which the liquid crystal compound is formed. Compound. Further, the liquid crystal compound which exhibits birefringence in the wavelength-dependent dispersion means a layer in which the liquid crystal compound is formed, and when the liquid crystal compound is oriented in the layer, the birefringence of the wavelength dispersion is exhibited. Liquid crystalline compound. In the case where the liquid crystal compound is uniformly oriented, it is possible to confirm the liquid crystal compound by examining whether the layer of the liquid crystal compound exhibits birefringence of either of the reverse wavelength dispersion property and the wavelength dispersion property. Whether or not the birefringence of either of the reverse wavelength dispersion property and the gradual wavelength dispersion property is exhibited. The uniform orientation of the liquid crystalline compound means that the layer containing the liquid crystalline compound is formed such that the direction of the maximum refractive index on the refractive index ellipsoid of the molecules of the liquid crystalline compound in the layer is parallel to the layer. Orientation in one direction of the plane of the layer.

Among them, from the viewpoint of realizing a polarizing plate which exhibits a reflection suppressing ability in a wide wavelength range, it is preferable to use a reverse-dispersion liquid crystal compound as the liquid crystal compound. The birefringence of the inversely dispersive liquid crystal compound appears to be the difference between the refractive index in the direction of the maximum refractive index and the refractive index in the other direction crossing the direction of the refractive index ellipsoid of the molecule of the inversely dispersive liquid crystalline compound. . Further, the wavelength dispersion of the refractive index in each of the above directions is different depending on the molecular structure of the inversely-dispersed liquid crystal compound. Accordingly, for example, in a direction in which the refractive index is relatively large, the refractive index measured by the long wavelength is smaller than the refractive index measured by the short wavelength, but the difference is small. . On the other hand, in the other direction in which the refractive index is relatively small, the refractive index measured by the long wavelength is smaller than the refractive index measured by the short wavelength, and the difference is large. The refractive index difference between the aforementioned directions in this example becomes small if the measurement wavelength is short, and becomes large if the measurement wavelength is long. As a result, birefringence of the inverse wavelength dispersion can be exhibited.

Examples of the inversely-dispersed liquid crystal compound include those represented by the following formula (I).

『化1』

In the formula (I), Ar represents a group represented by any one of the following formulae (II-1) to (II-7). In the formulae (II-1) to (II-7), * represents a bonding position with Z ¹ or Z ² .

『化2』

In the above formula (II-1) to formula (II-7), E ¹ and E ² are each independently, and are selected from -CR ¹¹ R ¹² -, -S-, -NR ¹¹ -, -CO- and -O. - The basis of the group. Further, R ¹¹ and R ¹² each independently represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. Among them, E ¹ and E ² are each independently -S-.

In the above formula (II-1) to formula (II-7), D ¹ to D ³ each independently represent an aromatic hydrocarbon ring group which may have a substituent or an aromatic heterocyclic group which may have a substituent. The number of carbon atoms (the number of carbon atoms including a substituent) represented by D ¹ to D ³ is independently independent, and is usually 2 to 100.

The aromatic hydrocarbon ring group in D ¹ to D ³ preferably has 6 to 30 carbon atoms. Examples of the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D ¹ to D ³ include a phenyl group and a naphthyl group. Among them, as the aromatic hydrocarbon ring group, a phenyl group is preferred.

Examples of the substituent of the aromatic hydrocarbon ring group in D ¹ to D ³ include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; and a carbon number of 1 to 6 such as a methyl group, an ethyl group or a propyl group; An alkyl group; an alkenyl group having 2 to 6 carbon atoms such as a vinyl group or an allyl group; a halogenated alkyl group having 1 to 6 carbon atoms such as a trifluoromethyl group; and a N having 1 to 12 carbon atoms such as a dimethylamino group; , N-dialkylamino group; alkoxy group having 1 to 6 carbon atoms such as methoxy group, ethoxy group, isopropoxy group; nitro group; -OCF ₃ ; -C(=O)-R ^b ; -O-C(=O)-R ^b ; -C(=O)-O-R ^b ;-SO ₂ R ^a ; The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

R ^a is selected from the group consisting of an alkyl group having 1 to 6 carbon atoms; and an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms as a substituent having 6 to 20 carbon atoms. Aromatic ring group; the group of the group formed.

R ^b represents an alkyl group having 1 to 20 carbon atoms which may have a substituent; an alkenyl group having 2 to 20 carbon atoms which may have a substituent; and 3 to 12 carbon atoms which may have a substituent a cycloalkyl group; and an aromatic hydrocarbon ring group having 6 to 12 carbon atoms which may have a substituent;

The number of carbon atoms of the alkyl group having 1 to 20 carbon atoms in R ^b is preferably from 1 to 12, more preferably from 4 to 10. Examples of the alkyl group having 1 to 20 carbon atoms in R ^b include a methyl group, an ethyl group, a n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, and a 1-methylpentyl group. -ethylpentyl, secondary butyl, tert-butyl, n-pentyl, isopentyl, neopentyl, n-hexyl, isohexyl, n-heptyl, n-octyl, n-decyl, n-decyl, Zheng eleven, positive twelve base, positive thirteen base, positive fourteen base, positive fifteen base, positive sixteen base, positive seventeen base, positive eighteen base, positive nineteen base and positive twenty base .

Examples of the substituent having an alkyl group having 1 to 20 carbon atoms in R ^b include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; and a dimethyl group having 2 to 12 carbon atoms; N,N-dialkylamino group; alkoxy group having 1 to 20 carbon atoms such as methoxy group, ethoxy group, isopropoxy group or butoxy group; methoxymethoxy group, methoxyethoxy group, etc. An alkoxy group having 1 to 12 carbon atoms substituted by an alkoxy group having 1 to 12 carbon atoms; a nitro group; an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as a phenyl group or a naphthyl group; a triazolyl group and a pyrrolyl group; a heterocyclic group having 2 to 20 carbon atoms such as a furyl group, a thienyl group, a thiazolyl group, a benzothiazol-2-ylthio group; a cyclopropyl group, a cyclopentyl group or a cyclohexyl group having 3 to 8 carbon atoms; a cycloalkyl group; a cycloalkoxy group having 3 to 8 carbon atoms such as a cyclopentyloxy group or a cyclohexyloxy group; a carbon atom number of 2 to 4 such as a tetrahydrofuranyl group, a tetrahydrohydropyranyl group, a dioxanyl group or a dioxanyl group; a cyclic ether group of 12; an aryloxy group having 6 to 14 carbon atoms such as a phenoxy group or a naphthyloxy group; and 1 or more hydrogen atoms such as a trifluoromethyl group, a pentafluoroethyl group, and a -CH ₂ CF ₃ Atomic substituted fluoroalkyl group having 1 to 12 carbon atoms; benzo Tetrahydrothiopyranyl; benzopyran-yl; benzodioxin uh-yl; and benzodioxin 𠮿 group; and the like. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

The number of carbon atoms of the alkenyl group having 2 to 20 carbon atoms in R ^b is preferably 2 to 12. Examples of the alkenyl group having 2 to 20 carbon atoms in R ^b include a vinyl group, a propenyl group, an isopropenyl group, a butenyl group, an isobutenyl group, a pentenyl group, a hexenyl group, a heptenyl group, and a octyl group. Alkenyl, nonenyl, undecenyl, dodecenyl, tridecenyl, tetradecenyl, pentadecyl, hexadecenyl, heptadecenyl, octadecyl, pentadecenyl Base and behenyl group.

As the number of carbon atoms in the alkenyl R ^b in the group have 2 to 20 having the substituent group include an alkyl group with the number of carbon atoms in R ^b in the 1 to 20 to have the same substituent group of embodiments. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

Examples of the cycloalkyl group having 3 to 12 carbon atoms in R ^b include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cyclooctyl group. Among them, as the cycloalkyl group, a cyclopentyl group and a cyclohexyl group are preferred.

Examples of the substituent having a cycloalkyl group having 3 to 12 carbon atoms in R ^b include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; and a dimethyl group having 2 to 12 carbon atoms; An N,N-dialkylamino group; an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group or a propyl group; and a carbon number of 1 to 6 such as a methoxy group, an ethoxy group or an isopropoxy group; An alkoxy group; a nitro group; and an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as a phenyl group and a naphthyl group; In the above, the substituent of the cycloalkyl group is a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group or a propyl group; a methoxy group and an ethoxy group; An alkoxy group having 1 to 6 carbon atoms such as an isopropoxy group; a nitro group; and an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as a phenyl group and a naphthyl group are preferred. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

Examples of the aromatic hydrocarbon ring group having 6 to 12 carbon atoms in R ^b include a phenyl group, a 1-naphthyl group, and a 2-naphthyl group. Among them, as the aromatic hydrocarbon ring group, a phenyl group is preferred.

Examples of the substituent of the aromatic hydrocarbon ring group having 6 to 12 carbon atoms in R ^b include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; and a dimethyl group having 2 to 12 carbon atoms; N,N-dialkylamino group; alkoxy group having 1 to 20 carbon atoms such as methoxy group, ethoxy group, isopropoxy group or butoxy group; methoxymethoxy group, methoxyethoxy group An alkoxy group having 1 to 12 carbon atoms which is substituted by an alkoxy group having 1 to 12 carbon atoms; a nitro group; a triazole group, a pyrrolyl group, a furyl group, a thienyl group and the like having 2 to 20 carbon atoms; a cycloalkyl group; a cycloalkyl group having 3 to 8 carbon atoms such as a cyclopropyl group, a cyclopentyl group or a cyclohexyl group; a cycloalkoxy group having 3 to 8 carbon atoms such as a cyclopentyloxy group or a cyclohexyloxy group; a tetrahydrofuranyl group; a cyclic ether group having 2 to 12 carbon atoms such as a tetrahydropyranyl group, a dioxinyl group or a dioxanyl group; an aryloxy group having 6 to 14 carbon atoms such as a phenoxy group or a naphthyloxy group; a fluoroalkyl group having 1 to 12 carbon atoms substituted with one or more hydrogen atoms such as a pentafluoroethyl group or a -CH ₂ CF ₃ group; -OCF ₃ ; benzofuranyl group; benzopyranyl group; Benzodioxanyl; benzodioxanyl; etc. In the above, the substituent of the aromatic hydrocarbon ring group is a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; an alkoxy group having 1 to 20 carbon atoms such as a methoxy group, an ethoxy group, an isopropoxy group or a butoxy group. ; a nitro group; an aromatic heterocyclic group having 2 to 20 carbon atoms such as a furyl group or a thienyl group; a cycloalkyl group having 3 to 8 carbon atoms such as a cyclopropyl group, a cyclopentyl group or a cyclohexyl group; a trifluoromethyl group; A fluoroalkyl group having 1 to 12 carbon atoms in which one or more hydrogen atoms such as fluoroethyl or -CH ₂ CF ₃ are substituted with a fluorine atom; -OCF _{3 is} preferred. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

The aromatic heterocyclic group in D ¹ to D ³ preferably has 2 to 30 carbon atoms. Examples of the aromatic heterocyclic group having 2 to 30 carbon atoms in D ¹ to D ³ include a 1-benzofuranyl group, a 2-benzofuranyl group, an imidazolyl group, a porphyrin group, and a furazyl group. , carbazolyl, quinolyl, thiadiazolyl, thiazolyl, thiazolopyridinyl, thiazolopyridyl, thiazolofluorenyl, thiazolopyrimidinyl, thienyl, tridecyl, triazolyl, Acridinyl, pyridyl, pyrazolyl, piperidyl, pyridyl, indolyl, pyrimidinyl, pyrrolyl, indolyl, furyl, benzene[c]thienyl, benzene[b]thienyl, Benzoisoxazolyl, benzisothiazolyl, benzimidazolyl, benzoxadiazolyl, benzoxazolyl, benzothiadiazolyl, benzothiazolyl, benzotrienyl, benzene And triazolyl and benzopyrazolyl and the like. Wherein, as the aromatic heterocyclic group, a monocyclic aromatic heterocyclic group such as a furyl group, a piperidyl group, a thienyl group, a carbazolyl group, a furyl group, a thiazolyl group or a thiadiazolyl group; and a benzothiazolyl group and a benzene group; And oxazolyl, quinolyl, 1-benzofuranyl, 2-benzofuranyl, fluorenylene, benzene [c]thienyl, benzene [b]thienyl, thiazolopyridyl, thiazole A fused heterocyclic heterocyclic group such as pyridyl, benzoisoxazolyl, benzoxadiazolyl or benzothiadiazolyl is preferred.

As the aromatic heterocyclic ring in D ¹ ~ D ³ in the group to have the substituent group include the same groups as in the embodiment of the aromatic hydrocarbon ring group to have the substituent D ¹ ~ D ^3. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

In the above formula (II-1) to formula (II-7), D ⁴ to D ⁵ each independently represent an acyclic group which may have a substituent. D ⁴ and D ⁵ may also form a ring. The number of carbon atoms (the number of carbon atoms including a substituent) represented by D ⁴ to D ⁵ is independently independent, and is usually from 1 to 100.

The acyclic group in D ⁴ to D ⁵ preferably has 1 to 13 carbon atoms. Examples of the acyclic group in D ⁴ to D ⁵ include an alkyl group having 1 to 6 carbon atoms; a cyano group; a carboxyl group; a fluoroalkyl group having 1 to 6 carbon atoms; and 1 to 6 carbon atoms. Alkoxy; -C(=O)-CH ₃ ; -C(=O)NHPh; -C(=O)-OR ^x . Wherein, as a non-cyclic group, a cyano group, a carboxyl group, -C(=O)-CH ₃ , -C(=O)NHPh, -C(=O)-OC ₂ H ₅ , -C(=O) -OC ₄ H ₉ , -C(=O)-OCH(CH ₃ ) ₂ , -C(=O)-OCH ₂ CH ₂ CH(CH ₃ )-OCH ₃ , -C(=O)-OCH ₂ CH ₂ C(CH ₃ ) ₂ -OH and -C(=O)-OCH ₂ CH(CH ₂ CH ₃ )-C ₄ H _{9 are} preferred. The aforementioned Ph represents a phenyl group. Further, the above R ^x represents an organic group having 1 to 12 carbon atoms. Specific examples of R ^x include an alkoxy group having 1 to 12 carbon atoms or an alkyl group having 1 to 12 carbon atoms which may be substituted with a hydroxyl group.

Examples of the substituent which the acyclic group in D ⁴ to D ⁵ has may be the same as the substituent which the aromatic hydrocarbon ring group in D ¹ to D ³ has. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

When D ⁴ and D ^{5 are} combined to form a ring, an organic group containing a ring is formed by the above D ⁴ and D ⁵ . The organic group may, for example, be a group represented by the following formula. In the following formula, * represents the position of the carbon bonded to D ⁴ and D ⁵ in each organic group.

『化3』

R ^* represents an alkyl group having 1 to 3 carbon atoms.

R ^** represents a group selected from the group consisting of an alkyl group having 1 to 3 carbon atoms and a phenyl group which may have a substituent.

R ^*** represents a group selected from the group consisting of an alkyl group having 1 to 3 carbon atoms and a phenyl group which may have a substituent.

R ^**** represents a group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, a hydroxyl group, and -COOR ¹³ . R ¹³ represents an alkyl group having 1 to 3 carbon atoms.

Examples of the substituent which the phenyl group has include a halogen atom, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a hydroxyl group, a carboxyl group, an alkoxy group, an aryloxy group, a decyloxy group, a cyano group and an amine group. . Among them, as the substituent, a halogen atom, an alkyl group, a cyano group, and an alkoxy group are preferred. The number of substituents which the phenyl group may have may be one or plural. Also, a plurality of substituents may be the same or different from each other.

In the above formula (II-1) to formula (II-7), D ⁶ represents a group selected from -C(R ^f )=N-N(R ^g )R ^h , -C(R ^f )=N-N= The basis of the group of C(R ^g )R ^h and -C(R ^f )=N-N=R ⁱ . The number of carbon atoms (the number of carbon atoms including a substituent) represented by D ⁶ is usually from 3 to 100.

R ^f represents a group selected from the group consisting of a hydrogen atom and an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group, a propyl group and an isopropyl group;

R ^g represents a group selected from the group consisting of: a hydrogen atom; and an organic group having 1 to 30 carbon atoms which may have a substituent;

Examples of the organic group having 1 to 30 carbon atoms which may have a substituent in R ^g include an alkyl group having 1 to 20 carbon atoms which may have a substituent, and an alkyl group having 1 to 20 carbon atoms. a group comprising at least one -CH ₂ -substituted by -O-, -S-, -O-C(=O)-, -C(=O)-O- or -C(=O)- ( However, it is excluded that two or more -O- or -S- are respectively adjacent and intervened); an alkenyl group having 2 to 20 carbon atoms which may have a substituent; and an alkyne having 2 to 20 carbon atoms which may have a substituent a cycloalkyl group having 3 to 12 carbon atoms which may have a substituent; an aromatic hydrocarbon ring group having 6 to 30 carbon atoms which may have a substituent; or a aryl group having 2 to 30 carbon atoms which may have a substituent Heterocyclic group; -SO ₂ R ^a ; -C(=O)-R ^b ; -CS-NH-R ^b . The meanings of R ^a and R ^b are as described above.

The range and example of the number of carbon atoms of the alkyl group having 1 to 20 carbon atoms in R ^g are the same as those of the alkyl group having 1 to 20 carbon atoms in R ^b .

Examples of the substituent having an alkyl group having 1 to 20 carbon atoms in R ^g include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; and a dimethyl group having 2 to 12 carbon atoms; N,N-dialkylamino group; alkoxy group having 1 to 20 carbon atoms such as methoxy group, ethoxy group, isopropoxy group or butoxy group; methoxymethoxy group, methoxyethoxy group, etc. An alkoxy group having 1 to 12 carbon atoms substituted by an alkoxy group having 1 to 12 carbon atoms; a nitro group; an aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as a phenyl group or a naphthyl group; a triazolyl group and a pyrrolyl group; a heterocyclic group having 2 to 20 carbon atoms such as a furyl group or a thienyl group; a cycloalkyl group having 3 to 8 carbon atoms such as a cyclopropyl group, a cyclopentyl group or a cyclohexyl group; a cyclopentyloxy group and a cyclohexyloxy group; a cycloalkyloxy group having 3 to 8 carbon atoms; a cyclic ether group having 2 to 12 carbon atoms such as a tetrahydrofuranyl group, a tetrahydrohydropyranyl group, a dioxinyl group or a dioxinyl group; a phenoxy group; An aryloxy group having 6 to 14 carbon atoms; a fluoroalkyl group having 1 to 12 carbon atoms substituted by one or more hydrogen atoms via a fluorine atom; a benzofuranyl group; a benzopyranyl group; a benzodioxane group uh-yl; benzodioxin 𠮿 group; -SO ₂ R ^a -SR ^b; carbon atoms, substituted by the -SR ^b group having 1 to 12 alkoxy; hydroxy; and the like. The meanings of R ^a and R ^b are as described above. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

The range and examples of the number of carbon atoms of the alkenyl group having 2 to 20 carbon atoms in R ^g are the same as those of the alkenyl group having 2 to 20 carbon atoms in R ^b .

As the number of the alkenyl carbon atoms and R ^g groups have 2 to 20 having the substituent group include the same group of embodiments and to have numbers of the alkyl R ^g of 1 to 20 carbon atoms, substituted. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

Examples of the alkynyl group having 2 to 20 carbon atoms in R ^g include an ethynyl group, a propynyl group, a 2-propynyl group (propargyl group), a butynyl group, a 2-butynyl group, and 3 Butynyl, pentynyl, 2-pentynyl, hexynyl, 5-hexynyl, heptynyl, octynyl, 2-octynyl, decynyl, decynyl, 7-decyne Base.

As the group to have the substituent R ^g alkynyl numbers of 2 to 20 carbon atoms, and examples thereof include the same group of embodiments and to have numbers of the alkyl R ^g of 1 to 20 carbon atoms, substituted. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

The cycloalkyl group having 3 to 12 carbon atoms in R ^g may, for example, be the same as the cycloalkyl group having 3 to 12 carbon atoms in R ^b .

As the alkyl group to have the substituent group in the ring of numbers R ^g 3 to 12 carbon atoms include, for example, the same group of embodiments and to have numbers of the alkyl R ^g of 1 to 20 carbon atoms, substituted. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

The aromatic hydrocarbon ring group having 6 to 30 carbon atoms in R ^g may, for example, be the same as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D ¹ to D ³ .

Examples of the substituent of the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in R ^g include the same substituents as those of the aromatic hydrocarbon ring group in D ¹ to D ³ . The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

The aromatic heterocyclic group having 2 to 30 carbon atoms in R ^g may, for example, be the same as the aromatic heterocyclic group having 2 to 30 carbon atoms in D ¹ to D ³ .

Examples of the substituent which the aromatic heterocyclic group having 2 to 30 carbon atoms in R ^g has may be the same as the substituent which the aromatic hydrocarbon ring group in D ¹ to D ³ has. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

In the above, R ^g is an alkyl group having 1 to 20 carbon atoms which may have a substituent; at least one -CH ₂ -O-, - is contained in an alkyl group having 1 to 20 carbon atoms. S-, -O-C(=O)-, -C(=O)-O- or -C(=O)-substituted groups (except for excluding two or more -O- or -S-, respectively a case of a cycloalkyl group having 3 to 12 carbon atoms which may have a substituent; an aromatic hydrocarbon ring group having 6 to 30 carbon atoms which may have a substituent; and a carbon atom number which may have a substituent An aromatic heterocyclic group of ～30 is preferred. Wherein, R ^g is an alkyl group having 1 to 20 carbon atoms which may have a substituent; and at least one -CH ₂ -O-, -S contained in an alkyl group having 1 to 20 carbon atoms -, -O-C(=O)-, -C(=O)-O- or -C(=O)-substituted groups (except for excluding two or more -O- or -S-, respectively Situation) is especially good.

R ^h represents an organic group having one or more aromatic rings selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic hetero ring having 2 to 30 carbon atoms.

As a preferable example of R ^h , (1) a cyclic hydrocarbon group having 6 or 40 carbon atoms having one or more aromatic hydrocarbon rings having 6 to 30 carbon atoms. Hereinafter, the cyclic hydrocarbon group having an aromatic hydrocarbon ring will be referred to as "(1) cyclic hydrocarbon group" as appropriate. Specific examples of the (1) cycloalkyl group include the following groups.

『化4』

(1) The cyclic hydrocarbon group may have a substituent. Examples of the substituent of the (1) cycloalkyl group include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group or a propyl group; and a vinyl group; An alkenyl group having 2 to 6 carbon atoms such as an allyl group; a halogenated alkyl group having 1 to 6 carbon atoms such as a trifluoromethyl group; and an N,N-dialkyl group having 2 to 12 carbon atoms such as a dimethylamino group; Amino group; alkoxy group having 1 to 6 carbon atoms such as methoxy group, ethoxy group or isopropoxy group; nitro group; aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as phenyl group and naphthyl group; -OCF ₃ ;-C(=O)-R ^b ; -O-C(=O)-R ^b ; -C(=O)-O-R ^b ;-SO ₂ R ^a ; The meanings of R ^a and R ^b are as described above. Among these, a halogen atom, a cyano group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms are preferred. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

^Further , as another preferable example of ^Rh , (2) one or more aromatic rings having a group selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic heterocyclic ring having 2 to 30 carbon atoms A heterocyclic group having 2 to 40 carbon atoms. Hereinafter, the heterocyclic group having an aromatic ring is referred to as "(2) heterocyclic group" as appropriate. Specific examples of the (2) heterocyclic group include the following groups. R independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

『化5』

『化6』

『化7』

『化8』

『化9』

『化10』

『化11』

『化12』

(2) The heterocyclic group may have a substituent. The substituent which the (2) heterocyclic group has may be, for example, the same as the substituent which the (1) cyclic hydrocarbon group has. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

As another good example of R ^h , (3) one or more selected from the group consisting of an aromatic hydrocarbon ring group having 6 to 30 carbon atoms and an aromatic heterocyclic group having 2 to 30 carbon atoms; The alkyl group having 1 to 12 carbon atoms is substituted by a group. Hereinafter, this substituted alkyl group is referred to as "(3) substituted alkyl group" as appropriate.

The "alkyl group having 1 to 12 carbon atoms" in the (3)-substituted alkyl group may, for example, be a methyl group, an ethyl group, a propyl group or an isopropyl group.

The "aromatic hydrocarbon group having 6 to 30 carbon atoms" in the (3)-substituted alkyl group is, for example, the same as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D ¹ to D ³ .

Examples of the "aromatic heterocyclic group having 2 to 30 carbon atoms" in the (3)-substituted alkyl group include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D ¹ to D ³ . .

(3) The substituted alkyl group may further have a substituent. The substituent which the (3) substituted alkyl group has may be, for example, the same as the substituent which the (1) cyclic hydrocarbon group has. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

Further, as another preferable example of R ^h , (4) one or more selected from the group consisting of an aromatic hydrocarbon ring group having 6 to 30 carbon atoms and an aromatic heterocyclic group having 2 to 30 carbon atoms; An alkenyl group having 2 to 12 carbon atoms substituted by a group. Hereinafter, this substituted alkenyl group is referred to as "(4) substituted alkenyl group" as appropriate.

The "alkenyl group having 2 to 12 carbon atoms" in the (4)-substituted alkenyl group may, for example, be a vinyl group or an allyl group.

The "aromatic hydrocarbon group having 6 to 30 carbon atoms" in the (4)-substituted alkenyl group is, for example, the same as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D ¹ to D ³ .

Examples of the "aromatic heterocyclic group having 2 to 30 carbon atoms" in the (4)-substituted alkenyl group include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D ¹ to D ³ . .

(4) The substituted alkenyl group may further have a substituent. The substituent which the (4) substituted alkenyl group has may be, for example, the same as the substituent which the (1) cyclic hydrocarbon group has. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

As another good example of R ^h , (5) one or more selected from the group consisting of an aromatic hydrocarbon ring group having 6 to 30 carbon atoms and an aromatic heterocyclic group having 2 to 30 carbon atoms; The alkynyl group having 2 to 12 carbon atoms is substituted by a group. Hereinafter, this substituted alkynyl group is referred to as "(5) substituted alkynyl group" as appropriate.

Examples of the "alkynyl group having 2 to 12 carbon atoms" in the (5)-substituted alkynyl group include an ethynyl group and a propynyl group.

The "aromatic hydrocarbon group having 6 to 30 carbon atoms" in the (5)-substituted alkynyl group is, for example, the same as the aromatic hydrocarbon ring group having 6 to 30 carbon atoms in D ¹ to D ³ .

Examples of the "aromatic heterocyclic group having 2 to 30 carbon atoms" in the (5)-substituted alkynyl group include the same examples as the aromatic heterocyclic group having 2 to 30 carbon atoms in D ¹ to D ³ . .

(5) The substituted alkynyl group may further have a substituent. Examples of the substituent which the (5) substituted alkynyl group has may be the same as the substituent which the (1) cyclic hydrocarbon group has. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

Specific examples of the preferable examples of ^Rh include the following groups.

『化13』

More preferable specific examples of R ^h include the following groups.

『化14』

Specific examples of the preferable examples of R ^h include the following groups.

『化15』

Specific examples of the above R ^h may further have a substituent. Examples of the substituent include a halogen atom such as a fluorine atom or a chlorine atom; a cyano group; an alkyl group having 1 to 6 carbon atoms such as a methyl group, an ethyl group or a propyl group; and a carbon number such as a vinyl group or an allyl group. An alkenyl group of 2 to 6; a halogenated alkyl group having 1 to 6 carbon atoms such as a trifluoromethyl group; an N,N-dialkylamino group having 2 to 12 carbon atoms such as a dimethylamino group; and a methoxy group; Alkoxy group having 1 to 6 carbon atoms such as ethoxy group or isopropoxy group; nitro group; -OCF ₃ ; -C(=O)-R ^b ; -O-C(=O)-R ^b ;- C(=O)-O-R ^b ; -SO ₂ R ^a ; The meanings of R ^a and R ^b are as described above. Among these, a halogen atom, a cyano group, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 6 carbon atoms are preferred. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

R ⁱ represents an organic group having one or more aromatic rings selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic hetero ring having 2 to 30 carbon atoms.

As a preferable example of R ⁱ , a cyclic hydrocarbon group having 6 or 40 carbon atoms having one or more aromatic hydrocarbon rings having 6 to 30 carbon atoms is exemplified.

Further, as another preferable example of R ⁱ , one or more aromatic rings selected from the group consisting of an aromatic hydrocarbon ring having 6 to 30 carbon atoms and an aromatic hetero ring having 2 to 30 carbon atoms are used. A heterocyclic group having 2 to 40 carbon atoms.

Specific examples of preferred examples of R ⁱ include the following groups. The meaning of R is as above.

『化16』

The group represented by any one of the formulae (II-1) to (II-7) may further have a substituent other than D ¹ to D ⁶ . Examples of the substituent include a halogen atom, a cyano group, a nitro group, an alkyl group having 1 to 6 carbon atoms, a halogenated alkyl group having 1 to 6 carbon atoms, and an N-alkyl group having 1 to 6 carbon atoms. An amine group, an N,N-dialkylamino group having 2 to 12 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylsulfinyl group having 1 to 6 carbon atoms, a carboxyl group, and a carbon number a sulfanyl group having 1 to 6 carbon atoms, an N-alkylamine sulfonyl group having 1 to 6 carbon atoms, and an N,N-dialkylamine sulfonyl group having 2 to 12 carbon atoms. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

As a preferable example of Ar in the formula (I), a group represented by the following formula (III-1) to formula (III-10) can be mentioned. Further, the group represented by the formula (III-1) to the formula (III-10) may have an alkyl group having 1 to 6 carbon atoms as a substituent. In the following formula, * indicates the bonding position.

『化17』

Specific examples of the formula (III-1) and the formula (III-4) include the following groups. In the following formula, * indicates the bonding position.

『化18』

『化19』

『化20』

『化21』

『化22』

In the formula (I), Z ¹ and Z ² are each independently represented by a single bond selected from -O-, -O-CH ₂ -, -CH ₂ -O-, -O-CH ₂ -CH ₂ -, - CH ₂ -CH ₂ -O-, -C(=O)-O-, -O-C(=O)-, -C(=O)-S-, -S-C(=O)-,- ^{NR 21 -C (= O) -} , - C (= O) -NR 21 -, - CF 2 -O -, - O-CF 2 -, - CH 2 -CH 2 -, - CF 2 -CF 2 - , -O-CH ₂ -CH ₂ -O-, -CH=CH-C(=O)-O-, -O-C(=O)-CH=CH-, -CH ₂ -C(=O) -O-, -O-C(=O)-CH ₂ -, -CH ₂ -O-C(=O)-, -C(=O)-O-CH ₂ -, -CH ₂ -CH ₂ - C(=O)-O-, -O-C(=O)-CH ₂ -CH ₂ -, -CH ₂ -CH ₂ -O-C(=O)-, -C(=O)-O- CH ₂ -CH ₂ -, -CH=CH-, -N=CH-, -CH=N-, -N=C(CH ₃ )-, -C(CH ₃ )=N-, -N=N- And -C≡C- formed by any of the groups. R ^{21 is} independently a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

In the formula (I), A ¹ , A ² , B ¹ and B ² each independently represent a group selected from the group consisting of an alicyclic group which may have a substituent and an aryl group which may have a substituent. The number of carbon atoms (the number of carbon atoms including the substituent) of the group represented by A ¹ , A ² , B ¹ and B ² is independently independent, and is usually from 3 to 100. Wherein, A ¹ , A ² , B ¹ and B ² are each independently, and an alicyclic group having 5 to 20 carbon atoms which may have a substituent or an aryl group having 2 to 20 carbon atoms which may have a substituent is good.

Examples of the alicyclic group in A ¹ , A ² , B ¹ and B ² include a cyclopentane-1,3-diyl group, a cyclohexane-1,4-diyl group, and a cycloheptane-1. a cycloalkanediyl group having 5 to 20 carbon atoms such as 4-diyl or cyclooctane-1,5-diyl; decalin-1,5-diyl, decahydronaphthalene-2,6-diyl And a bicycloalkanediyl group having 5 to 20 carbon atoms; Among them, a cycloalkanediyl group having 5 to 20 carbon atoms which may be substituted is preferred, a cyclohexanediyl group is preferred, and a cyclohexane-1,4-diyl group is preferred. The alicyclic group may be a trans form, a cis form, or a mixture of a cis form and a trans form. Among them, a trans form is preferred.

Examples of the substituent which the alicyclic group in A ¹ , A ² , B ¹ and B ² has include a halogen atom, an alkyl group having 1 to 6 carbon atoms, and an alkoxy group having 1 to 5 carbon atoms. Base, nitro, cyano, and the like. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

Examples of the aryl group in A ¹ , A ² , B ¹ and B ² include a 1,2-phenylene group, a 1,3-phenylene group, a 1,4-phenylene group, and a 1,4- An aromatic hydrocarbon ring group having 6 to 20 carbon atoms such as anthranyl group, 1,5-anthranyl group, 2,6-anthranyl group, 4,4'-extended biphenyl group; furan-2,5-diyl group, An aromatic heterocyclic group having 2 to 20 carbon atoms such as thiophene-2,5-diyl, pyridine-2,5-diyl or pyridin-2,5-diyl; Among them, an aromatic hydrocarbon ring group having 6 to 20 carbon atoms is preferred, and a phenylene group is more preferred, and a 1,4-phenylene group is preferred.

Examples of the substituent which the aryl group in A ¹ , A ² , B ¹ and B ² has may be, for example, the same as the substituent which the alicyclic group in A ¹ , A ² , B ¹ and B ² has. An example. The number of substituents may be one or plural. Also, a plurality of substituents may be the same or different from each other.

In the formula (I), Y ¹ to Y ⁴ are each independently, and are selected from a single bond, -O-, -C(=O)-, -C(=O)-O-, -O-C(=O). )-, -NR ²² -C(=O)-, -C(=O)-NR ²² -, -O-C(=O)-O-, -NR ²² -C(=O)-O-, -O-C(=O)-NR ²² - and -NR ²² -C(=O)-NR ²³ - any of the groups. R ²² and R ²³ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

In the formula (I), G ¹ and G ² each independently represent an aliphatic hydrocarbon group selected from 1 to 20 carbon atoms; and one or more sub-groups of aliphatic hydrocarbon groups having 3 to 20 carbon atoms. a group in which the group (-CH ₂ -) is substituted with -O- or -C(=O)-; The hydrogen atom contained in the organic group of G ¹ and G ² may be substituted by an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms or a halogen atom. However, the methylene group (-CH ₂ -) at both ends of G ¹ and G ² is not substituted by -O- or -C(=O)-.

Specific examples of the aliphatic hydrocarbon group having 1 to 20 carbon atoms in G ¹ and G ² include an alkylene group having 1 to 20 carbon atoms.

Specific examples of the aliphatic hydrocarbon group having 3 to 20 carbon atoms in G ¹ and G ² include an alkylene group having 3 to 20 carbon atoms.

In the formula (I), P ¹ and P ² are each independently and represent a polymerizable group. Examples of the polymerizable group in P ¹ and P ² include a group represented by CH ₂ =CR ³¹ -C(=O)-O- such as an acryloxy group or a methacryloxy group; ; vinyl ether; p-styryl; propylene fluorenyl; methacryl fluorenyl; carboxy; methylcarbonyl; hydroxy; decylamino; alkylamino group having 1 to 4 carbon atoms; Oxyl; oxo group; aldehyde group; isocyanate group; sulfur isocyanate group; R ³¹ represents a hydrogen atom, a methyl group or a chlorine atom. Wherein, the group represented by CH ₂ =CR ³¹ -C(=O)-O- is preferred, and CH ₂ =CH-C(=O)-O-(propylene decyloxy), CH ₂ =C (CH ₃ )-C(=O)-O-(methacryloxy)oxy group is preferred, and propylene fluorenyloxy group is preferred.

In the formula (I), p and q are each independently and represent 0 or 1.

The reverse-dispersion liquid crystal compound represented by the formula (I) can be produced, for example, by reacting a ruthenium compound described in International Patent Publication No. 2012/147904 with a carbonyl compound.

The liquid crystal composition may also contain a surfactant as an optional component. In particular, from the viewpoint of stably obtaining a liquid crystal cured layer excellent in orientation, a surfactant containing a fluorine atom in a molecule is preferable as the surfactant. In the following description, a surfactant containing a fluorine atom in a molecule is referred to as a "fluorine-based surfactant" as appropriate.

The surfactant is preferably a nonionic surfactant. In the case where the surfactant is a nonionic surfactant that does not contain an ionic group, the surface state and orientation of the liquid crystal cured layer can be optimized.

The surfactant may be polymerizable or polymerizable. Since the polymerizable surfactant is polymerized by the step of curing the liquid crystal composition layer, it is usually included in a part of the polymer molecule in the cured product of the liquid crystal composition.

Examples of the surfactant include a Surflon series (S420, etc.) manufactured by AGC Seimi Chemical Co., Ltd., a FTERGENT series (251, FTX-212M, FTX-215M, FTX-209, etc.) manufactured by NEOS Co., Ltd., and DIC. A fluorine-based surfactant such as MEGAFAC series (F-444, F-562, etc.) manufactured by the company. Further, the surfactant may be used singly or in combination of two or more kinds in any ratio.

The amount of the surfactant is preferably 0.03 parts by weight or more, more preferably 0.05 parts by weight or more, more preferably 0.50 parts by weight or less, and preferably 0.30 parts by weight or less based on 100 parts by weight of the liquid crystalline compound. By the amount of the surfactant in the above range, a liquid crystal cured layer excellent in orientation can be obtained.

The liquid crystal composition may also contain a polymerization initiator as an optional component. The type of the polymerization initiator is selected depending on the kind of the polymerizable compound contained in the liquid crystal composition. For example, if the polymerizable compound is radically polymerizable, a radical polymerization initiator is used. Further, when the polymerizable compound is anionic polymerizable, an anionic polymerization initiator is used. Further, if the polymerizable compound is cationically polymerizable, a cationic polymerization initiator is used. The polymerization initiator may be used singly or in combination of two or more kinds in any ratio.

The amount of the polymerization initiator is preferably 0.1 part by weight or more, more preferably 0.5 part by weight or more, more preferably 30 parts by weight or less, even more preferably 10 parts by weight or less, based on 100 parts by weight of the liquid crystalline compound. . By the amount of the polymerization initiator falling within the above range, the polymerization can be efficiently carried out.

The liquid crystal composition may also contain a solvent as an optional component. As the solvent, those which can dissolve the liquid crystalline compound are preferred. As such a solvent, an organic solvent is usually used. Examples of the organic solvent include ketone solvents such as cyclopentanone, cyclohexanone, methyl ethyl ketone, acetone, and methyl isobutyl ketone; acetate solvents such as butyl acetate and amyl acetate; chloroform, Halogenated hydrocarbon solvent such as dichloromethane or dichloroethane; 1,4-dioxane, cyclopentyl methyl ether, tetrahydrofuran, tetrahydropyran, 1,3-dioxane, 1,2-dimethoxy An ether solvent such as ethane; and an aromatic solvent such as toluene, xylene or 1,3,5-trimethylbenzene. Further, the solvent may be used singly or in combination of two or more kinds in any ratio.

The boiling point of the solvent is preferably from 60 ° C to 250 ° C and from 60 ° C to 150 ° C from the viewpoint of excellent workability.

The amount of the solvent is preferably 200 parts by weight or more based on 100 parts by weight of the liquid crystalline compound, more preferably 250 parts by weight or more, more preferably 300 parts by weight or more, and most preferably 650 parts by weight or less, and 550 parts by weight or less. It is preferably in the form of parts by weight or less, more preferably 450 parts by weight or less. By setting the amount of the solvent to be equal to or higher than the lower limit of the above range, generation of foreign matter can be suppressed, and the drying load can be reduced by setting it to be equal to or less than the upper limit of the above range.

Examples of other optional components to be contained in the liquid crystal composition include a metal; a metal complex; a metal oxide such as titanium oxide; a coloring agent such as a dye or a pigment; a light-emitting material such as a fluorescent material or a phosphorescent material; and a leveling agent; Thixotropic agent; gelling agent; polysaccharide; ultraviolet absorber; infrared absorber; antioxidant; ion exchange resin; The amount of these components is 0.1 to 20 parts by weight per 100 parts by weight of the total of the liquid crystalline compounds.

[5. Polarizer]

A polarizing plate can be obtained by using the above optical anisotropic body. This polarizing plate is usually provided with an optical anisotropic body and a linear polarizing member. The polarizing plate preferably functions as a circular polarizing plate or an elliptically polarizing plate. By providing such a polarizing plate on the organic EL display panel, it is possible to suppress reflection of external light in the front direction of the display surface of the organic EL display panel.

Further, the optically anisotropic layer of the optical anisotropic body is composed of a first region including a first slow axis and a second slow axis which are inclined with respect to the in-plane direction (that is, with respect to the plane of the layer) in a specific cross section. As can be seen from the second region, the birefringence can be appropriately adjusted not only in the in-plane direction but also in the thickness direction. According to this, the polarizing plate can suppress the reflection of external light in the oblique direction not only in the front direction of the display surface of the organic EL display panel.

Further, the optical anisotropic body can suppress the dependence of the retardation of the entire optically anisotropic layer including the first region and the second region. According to this, the polarizing plate can suppress the directional dependence of the reflection suppressing ability in the oblique direction.

Therefore, according to the polarizing plate having the optical anisotropic body, an organic EL display panel having an excellent viewing angle in a wide range of orientation can be realized.

The linear polarizer may, for example, be a film obtained by uniaxially stretching in a boric acid bath after adsorbing iodine or a dichroic dye on a polyvinyl alcohol film; by adsorbing iodine or a dichroic dye A film obtained by stretching a polyvinyl alcohol film and further modifying one of the polyvinyl alcohol units in the molecular chain to a polyethylene unit. Further, as another example of the linear polarizer, a polarizer having a function of separating polarized light into reflected light and transmitted light, such as a grid polarizer or a multilayer polarizer, may be mentioned. Among these, as the linear polarizer, a polarizer containing polyvinyl alcohol is preferred.

If natural light is incident on the linear polarizer, only polarized light in a single direction will penetrate. The degree of polarization of the linear polarizer is not particularly limited, but is preferably 98% or more, and more preferably 99% or more.

Further, the thickness of the linear polarizer is preferably 5 μm to 80 μm.

In the case where the polarizing plate is to function as a circular polarizing plate, the angle of the in-plane slow axis of the optically anisotropic layer is 45° or close to the polarizing absorption axis of the linear polarizing member as viewed from the thickness direction. The angle is better. The foregoing angle, specifically, is preferably 45°±5° (ie, 40° to 50°), and preferably 45°±4° (ie, 41° to 49°) to 45°±3°. It is especially good (ie 42°~48°).

The polarizing plate may further include any layer body in addition to the linear polarizer and the optical anisotropic body. Examples of the arbitrary layer body include a bonding layer for bonding a linear polarizing member and an optical anisotropic body, a polarizing member protective film layer for protecting the linear polarizing member, and the like.

[6. Organic EL display panel]

The polarizing plate may be provided on the organic EL display panel as a reflection suppressing film. Such an organic EL display panel usually includes an organic EL element as a display element, and a polarizing plate is provided on the viewing side of the organic EL element. Further, the polarizing plate is disposed such that an optical anisotropic body is provided between the organic EL element and the linear polarizer.

Hereinafter, a case where the polarizing plate functions as a circular polarizing plate will be described as an example, and a mechanism for suppressing reflection will be described. The light incident from the outside of the device, only a part of which is linearly polarized, passes through the linear polarizer, and then passes through the optically anisotropic layer of the optical anisotropic body, thereby becoming circularly polarized. The circularly polarized light is reflected by a constituent element (reflection electrode of the organic EL element, etc.) that reflects light in the organic EL display panel, and passes through the optically anisotropic layer of the optical anisotropic body again, thereby becoming a straight line with incidence. The linear vibration of the direction of vibration in which the direction of vibration of the polarized light is orthogonal is not transmitted through the linear polarizer. Here, the vibration direction of the linearly polarized light means the vibration direction of the electric field of the linearly polarized light. Thereby, the function of suppressing reflection is achieved. The principle of such suppression of reflection can be referred to Japanese Patent Laid-Open Publication No. H9-127885.

The organic EL device usually has a transparent electrode layer, a light-emitting layer, and an electrode layer in this order, and a light is applied from the transparent electrode layer and the electrode layer to generate light. Examples of the material constituting the organic light-emitting layer include polyparaphenylene-based, polyfluorene-based, and polyvinylcarbazole-based materials. Further, the light-emitting layer may have a plurality of layers of layers having different luminescent colors, or a layer of a certain coloring layer doped with a mixed layer of dissimilar pigments. Further, the organic EL element may include a functional layer such as a hole injection layer, a hole transport layer, an electron injection layer, an electron transport layer, an equipotential surface formation layer, and a charge generation layer.

Further, in the organic EL display panel, the optical anisotropic body may be provided for use other than the reflection suppressing film.

『Example』

The examples are disclosed below to specifically illustrate the invention. However, the present invention is not limited to the embodiments disclosed below, and may be carried out without departing from the scope of the invention and the scope of the invention.

In the following description, "%" and "parts" indicating the amount are based on weight unless otherwise noted. Further, the operation described below is carried out in a normal temperature and atmospheric atmosphere unless otherwise noted.

In the following description, the delayed measurement wavelength is 550 nm unless otherwise noted. Further, since the adhesive used in the following examples and comparative examples and the optically isotropic resin film have optical isotropy, the measurement results of the retardation are not affected.

In Examples 1 to 17, which will be described later, the heating conditions for orienting the liquid crystal compound contained in the liquid crystal composition layer are such that the residual component viscosity of the test composition corresponding to the liquid crystal composition used is 800 cP or less. condition.

[Measurement method of the angle of the slow axis relative to the in-plane direction (ie, relative to the plane of the layer) in a particular section]

The liquid crystal cured layer is cut so as to exhibit a specific cross section parallel to both the in-plane slow axis and the thickness direction of the liquid crystal cured layer. The sections containing the specific sections that were present were observed by polarized light under a polarized microscope. While performing this polarization observation, the liquid crystal cured layer is rotated centering on the axis perpendicular to the specific cross section. By this polarized observation, the extinction position is specified. The slow axis of the liquid crystal cured layer in the specific cross section described above is measured from a specific extinction position. Thereafter, the angle of the slow axis with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layer) is obtained.

And, in particular, in Embodiment 13, respectively measuring the angle θ1 of the first slow axis of the first region of the liquid crystal cured layer with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layer), and The second slow axis of the two regions is opposed to the in-plane direction of the liquid crystal cured layer (ie, relative to the plane of the layer) by an angle θ2 instead of measuring the slow axis of the liquid crystal cured layer as a whole.

[Measurement method of in-plane retardation Re]

The in-plane retardation of the liquid crystal cured layer was measured using a phase difference meter ("AxoScan" manufactured by Axometrics Co., Ltd.).

[Measurement method of wavelength dispersion]

The in-plane retardation Re(450) and Re(550) of the liquid crystal cured layer at 450 nm and 550 nm were measured. From the measurement results, the wavelength dispersion property was determined by the following criteria.
"Inverse Wavelength Dispersion": Re(450)<Re(550)
"Shun-wavelength dispersion": Re(450)>Re(550)

[Evaluation method of viewing angle characteristics]

(viewing angle F)

The retardation of the optical anisotropic body was measured using a phase difference meter ("AxoScan" manufactured by Axometrics Co., Ltd.) at an incident angle of -50 to +50. This measurement system is such that the measurement direction becomes perpendicular to the in-plane slow axis of the optically anisotropic layer, and the optical anisotropic body is rotated around the rotation axis parallel to the in-plane slow axis of the optically anisotropic layer. Come on.

The retardation R (-50°), R (0°), and R (+50°) from the incident angles of -50°, 0°, and +50°, and the F value for viewing angle evaluation is obtained by the following formula (X1) .
F value = {[R(-50°)/2] + [R(+50°)/2]}/R(0°) (X1)

For the obtained F value, the evaluation score is given by the following criteria.
1 point: F<0.90.
2 points: 0.90 ≦ F < 0.95
3 points: 0.95≦F≦1.05
2 points: 1.05<F≦1.10
1 point: 1.10<F

(viewing angle S)

The retardation of the optical anisotropic body was measured using a phase difference meter ("AxoScan" manufactured by Axometrics Co., Ltd.) at an incident angle of -50 to +50. This measurement system is such that the measurement direction becomes perpendicular to the in-plane fast axis of the optical anisotropic body, and the optical anisotropic body is centered on the rotation axis parallel to the in-plane fast axis of the optical anisotropic body. Rotate to proceed.

The retardation R (-50°), R (0°), and R (+50°) from the incident angles of -50°, 0°, and +50°, and the S value for viewing angle evaluation is obtained by the following formula (X2) .
S value={[R(-50°)/2]+[R(+50°)/2]}/R(0°) (X2)

For the obtained S value, the evaluation score is given by the following criteria.
1 point: S<0.90.
2 points: 0.90 ≦ S < 0.95
3 points: 0.95 ≦ S ≦ 1.05
2 points: 1.05<S≦1.10
1 point: 1.10<S

(Comprehensive evaluation of perspective)

The aforementioned evaluation score for the F value and the evaluation score for the S value are totaled. Then, based on the total of the obtained evaluation scores, the overall evaluation of the angle of view is performed by the following criteria.
"A": The total score is 6 points or more.
"B": One of the evaluation scores of the F value and the evaluation score of the S value is 3 or more, and the total of the evaluation scores is 4 or more and less than 6 points.
"C": Both the evaluation score of the F value and the evaluation score of the S value are less than 3 points, and the total of the evaluation scores is 4 or more and less than 6 points.
"D": The total score of the evaluation score is less than 4 points.

[Evaluation method of the difference between the maximum value and the minimum value of the delay in the azimuth direction]

The retardation R (-50°) and R (+50°) measured in the direction perpendicular to the in-plane slow axis and the "fast axis relative to the in-plane" are obtained for the optical anisotropic body. The measured delays R (-50°) and R (+50°) in the direction of the vertical measurement are taken as a delay R (50°) at an incident angle of 50°. Then, the retardation R (50°) is divided by the retardation R (0°) at an incident angle of 0°, respectively, and the retardation ratio R (50°)/R (0°) of the optical anisotropic layer 100 is obtained. Calculate the difference between the maximum and minimum values of the delay ratio R(50°)/R(0°), and obtain the retardation ratio of the optical anisotropic layer R(50°)/R(0°) in the orientation. The difference between the maximum value and the minimum value in the angular direction is ΔR (50°) / R (0°). Since the difference between the maximum value and the minimum value ΔR(50°)/R(0°) is smaller, the maximum and minimum values of the retardation of the optically anisotropic layer in the oblique direction in the azimuthal direction can be effectively suppressed. Inferior, in other words, it is said that the more the directional dependence of the retardation of the optically anisotropic layer in the oblique direction can be suppressed.

[Example 1]

(Manufacture of liquid crystal composition)

100 parts by weight of a polymerizable "reverse-dispersion liquid crystal compound A" represented by the following formula, and a fluorine-based surfactant ("S420" manufactured by AGC Seimi Chemical Co., Ltd.), 0.15 parts by weight, photopolymerization 4.3 parts by weight of a starter ("Irgacure OXE04" manufactured by BASF Corporation), and 162.3 parts by weight of cyclopentanone as a solvent and 243.5 parts by weight of 1,3-dioxane were used to produce a liquid crystal composition.

『化23』

Inverse dispersion liquid crystalline compound A

(Manufacture of intermediate film including liquid crystal cured layer)

A polyethylene terephthalate film ("A4100" manufactured by Toyobo Co., Ltd., thickness: 100 μm; hereinafter referred to as "PET film") was prepared as a support substrate. This PET film is a film which is applied on one side by a slippery treatment.

The non-slip surface of the PET film was subjected to a rubbing treatment. Thereafter, the liquid crystal composition was applied onto the rubbed surface of the PET film by using a wire bar to form a liquid crystal composition layer.

The liquid crystal composition layer was heated at 135 ° C for 4 minutes to orient the liquid crystalline compound in the layer.

Thereafter, the liquid crystal composition layer was irradiated with ultraviolet rays of 500 mJ/cm ² in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby obtaining a first unit cured layer having a thickness of 0.4 μm.

The surface of the first unit cured layer is subjected to a rubbing treatment. Then, on the rubbing treatment surface of the first unit solidified layer, "the liquid crystal composition remaining for forming the first unit solidified layer" is applied by a wire bar to form a liquid crystal composition layer.

The liquid crystal composition layer was heated at 135 ° C for 4 minutes to orient the liquid crystalline compound in the layer.

Thereafter, the liquid crystal composition layer was irradiated with ultraviolet rays of 500 mJ/cm ² in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby obtaining a second unit cured layer.

Thereby, an intermediate film comprising a PET film and a liquid crystal cured layer containing the first unit cured layer and the second unit cured layer is obtained. Although the molecules of the liquid crystalline compound contained in the liquid crystal cured layer are inclined with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layered body), the inclination angle thereof is not uniform. Specifically, the tilt angle of the molecules of the liquid crystal compound on the PET film side of the liquid crystal cured layer is relatively small, and the tilt angle of the molecules of the liquid crystal compound on the air side of the liquid crystal cured layer is relatively large. The liquid crystal cured layer was evaluated by the above method using the obtained intermediate film.

(Manufacture of optical anisotropic body)

Two film sheets of the first film sheet and the second film sheet are cut out from the intermediate film. The liquid crystal cured layer of the first film sheet and the liquid crystal cured layer of the second film sheet were bonded together by a binder ("CS9621T" manufactured by Nitto Denko Corporation). In the following description, the liquid crystal cured layer of the first film sheet may be referred to as a "first liquid crystal cured layer", and the liquid crystal cured layer of the second film sheet may be referred to as a "second liquid crystal cured layer". Further, the bonding is carried out in such a manner as to satisfy the following conditions (X3) and (X4).
(X3) The in-plane slow axis of the first liquid crystal cured layer and the in-plane slow axis of the second liquid crystal cured layer become parallel.
(X4) In a specific cross section in which the optically anisotropic layer of the optically anisotropic body obtained is cut in a plane parallel to both the in-plane slow axis and the thickness direction of the optically anisotropic layer, the first liquid crystal The slow axis of the cured layer and the slow axis of the second liquid crystal cured layer are at an angle Δθ as disclosed in Table 1.

Thereafter, the PET film of the first film sheet was peeled off. The surface of the first liquid crystal cured layer which has been peeled off by peeling off the PET film and the optically isotropic resin film (Zeonor Film made by Nippon Seychelles Co., Ltd.) are bonded together by the above-mentioned adhesive. . Then, the PET film of the second film sheet was peeled off to obtain an optical anisotropic body having a layer structure of "resin film/adhesive layer/first liquid crystal cured layer/adhesive layer/second liquid crystal cured layer". In the optical anisotropic body, a portion of the "first liquid crystal cured layer/adhesive layer/second liquid crystal cured layer" corresponds to an optically anisotropic layer, and the first liquid crystal cured layer corresponds to the first region, and the second liquid crystal The cured layer corresponds to the second region. According to this, in the optically anisotropic layer obtained in the first embodiment, the surface on the side where the inclination angle of the first region is larger is opposite to the surface on which the inclination angle of the second region is larger (see FIG. 6).

The obtained optical anisotropic body was evaluated by the above method.

[Embodiment 2]

The second embodiment is an embodiment in which the bonding direction of "the first liquid crystal cured layer corresponding to the first region" and the "second liquid crystal cured layer corresponding to the second region" are changed from the first embodiment. The specific operation of this embodiment 2 is as follows.

The two film sheets of the first film sheet and the second film sheet were cut out from the intermediate film produced in Example 1. The second liquid crystal cured layer of the second film sheet and the optically isotropic resin film are bonded together by a binder. Thereafter, the PET film was peeled off to obtain a multilayer film having a layer structure of "resin film/adhesive layer/second liquid crystal cured layer".

Thereafter, the second liquid crystal cured layer of the multilayer film and the first liquid crystal cured layer of the first film sheet are bonded together by the binder. This bonding was carried out in such a manner as to satisfy the conditions (X3) and (X4) explained in the first embodiment. Subsequently, the PET film of the first film sheet was peeled off to obtain an optical anisotropic body having a layer structure of "first liquid crystal cured layer/adhesive layer/second liquid crystal cured layer/adhesive layer/resin film". In the optical anisotropic body, a portion of the "first liquid crystal cured layer/adhesive layer/second liquid crystal cured layer" corresponds to an optically anisotropic layer, and the first liquid crystal cured layer corresponds to the first region, and the second liquid crystal The cured layer corresponds to the second region. According to this, in the liquid crystal solidified layer obtained in Example 2, the surface on the side where the inclination angle of the first region is larger is opposite to the surface on which the inclination angle of the second region is smaller (see FIG. 7).

The obtained optical anisotropic body was evaluated by the above method.

[Example 3]

Example 3 is an example in which the bonding direction of "the first liquid crystal cured layer corresponding to the first region" and the "second liquid crystal cured layer corresponding to the second region" were changed from Example 1. The specific operation of this embodiment 3 is as follows.

The two film sheets of the first film sheet and the second film sheet were cut out from the intermediate film produced in Example 1.

The first liquid crystal cured layer of the first film sheet is bonded to the optically isotropic resin film by the aforementioned adhesive. Thereafter, the PET film was peeled off to obtain a multilayer film having a layer structure of "resin film/adhesive layer/first liquid crystal cured layer".

Further, in the same manner, the second liquid crystal cured layer of the second film sheet is bonded to the optically isotropic resin film by the above-mentioned adhesive. Thereafter, the PET film was peeled off to obtain a multilayer film having a layer structure of "resin film/adhesive layer/second liquid crystal cured layer".

Thereafter, the first liquid crystal cured layer and the second liquid crystal cured layer of the multilayer film are bonded together by the binder. This bonding was carried out in such a manner as to satisfy the conditions (X3) and (X4) explained in the first embodiment. Thereby, an optical anisotropic body having a layer structure of "resin film/adhesive layer/first liquid crystal cured layer/adhesive layer/second liquid crystal cured layer/adhesive layer/resin film" was obtained. In the optical anisotropic body, a portion of the "first liquid crystal cured layer/adhesive layer/second liquid crystal cured layer" corresponds to an optically anisotropic layer, and the first liquid crystal cured layer corresponds to the first region, and the second liquid crystal The cured layer corresponds to the second region. According to this, in the liquid crystal solidified layer obtained in Example 3, the surface on the side where the inclination angle of the first region is small is opposite to the surface on which the inclination angle of the second region is small (see FIG. 5).

The obtained optical anisotropic body was evaluated by the above method.

[Example 4]

Embodiment 4 is based on Embodiment 1 in which "the first slow axis of the first region is opposed to the in-plane direction (that is, the angle with respect to the layer plane) θ1" and "the second slow axis of the second region is relative to An embodiment in which the in-plane direction (that is, the angle θ2) sandwiched by the plane of the layer is changed. The specific operation of this embodiment 4 is as follows.

Changing the coating thickness of the liquid crystal composition to change the thickness of the first unit cured layer and the second unit cured layer, and further changing the temperature at the time of orientation to 120 ° C, whereby the liquid crystal cured layer is slow in a specific cross section of the liquid crystal cured layer. The angle of the axis with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layer) was changed to 20°. Except for the above, the same operation as in Example 1 was carried out to produce and evaluate an optical anisotropic body.

[Example 5]

Embodiment 5 is based on Embodiment 1 in which "the angle θ1" between the first slow axis of the first region with respect to the in-plane direction (that is, with respect to the plane of the layer plane) and "the second slow axis of the second region are relative to An embodiment in which the in-plane direction (that is, the angle θ2) sandwiched by the plane of the layer is changed. The specific operation of this embodiment 5 is as follows.

Changing the coating thickness of the liquid crystal composition to change the thickness of the first unit cured layer and the second unit cured layer, and further changing the temperature at the time of orientation to 130 ° C, whereby the liquid crystal cured layer is slow in a specific cross section of the liquid crystal cured layer. The angle of the axis with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layer) was changed to 25°. Except for the above, the same operation as in Example 1 was carried out to produce and evaluate an optical anisotropic body.

[Embodiment 6]

In the sixth embodiment, the "type of liquid crystal compound to be used" is changed from the first embodiment, and the first slow axis of the first region is changed from the in-plane direction (that is, to the plane of the layer) from the first embodiment. An embodiment in which the angle θ1" and the "second slow axis of the second region are changed with respect to the in-plane direction (that is, the angle θ2 with respect to the plane of the layer)" is changed. The specific operation of this embodiment 6 is as follows.

The type of the liquid crystal compound is changed from the inverse dispersion liquid crystal compound A to the polymerizable cis-dispersion liquid crystal compound B represented by the following formula. Further, the coating thickness of the liquid crystal composition is changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the slow axis of the liquid crystal cured layer in the specific cross section of the liquid crystal cured layer is opposite to the surface of the liquid crystal cured layer The angle sandwiched by the inner direction (ie, relative to the plane of the layer) is changed to 35°. Except for the above, the same operation as in Example 1 was carried out to produce and evaluate an optical anisotropic body.

『化24』

Shun dispersion liquid crystal compound B

[Embodiment 7]

In the seventh embodiment, the "type of liquid crystal compound to be used" is partially changed from the first embodiment, and the first slow axis of the first region is changed from the in-plane direction (that is, to the plane of the layer). The embodiment in which the angle θ1" and the second slow axis of the second region are changed with respect to the in-plane direction (that is, the angle θ2 with respect to the plane of the layer). The specific operation of this embodiment 7 is as follows.

Changing the coating thickness of the liquid crystal composition to change the thickness of the first unit cured layer and the second unit cured layer, and further changing the temperature at the time of orientation to 130 ° C, whereby the liquid crystal cured layer is slow in a specific cross section of the liquid crystal cured layer. The angle of the axis with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layer) was changed to 25°. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film thus obtained.

On the other hand, the type of the liquid crystal compound is changed from the inverse dispersion liquid crystal compound A to the cis-dispersion liquid crystal compound B. Further, the coating thickness of the liquid crystal composition is changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the slow axis of the liquid crystal cured layer in the specific cross section of the liquid crystal cured layer is opposite to the surface of the liquid crystal cured layer. The angle sandwiched by the inner direction (ie, relative to the plane of the layer) is changed to 35°. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film thus obtained.

The procedure of Example 1 (optical anisotropy) was carried out except that the first film sheet and the second film sheet prepared in the present example were used instead of the first film sheet and the second film sheet prepared in Example 1. The manufacture of the optical anisotropic body was carried out and evaluated in the same manner.

[Embodiment 8]

In the eighth embodiment, the "type of liquid crystal compound to be used" is partially changed from the first embodiment, and the first slow axis of the first region is changed from the in-plane direction (that is, to the plane of the layer). The embodiment in which the angle θ1" and the second slow axis of the second region are changed with respect to the in-plane direction (that is, the angle θ2 with respect to the plane of the layer). The specific operation of this embodiment 8 is as follows.

The type of the liquid crystal compound is changed from the inverse dispersion liquid crystal compound A to the cis-dispersion liquid crystal compound B. Further, the coating thickness of the liquid crystal composition is changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the slow axis of the liquid crystal cured layer in the specific cross section of the liquid crystal cured layer is opposite to the surface of the liquid crystal cured layer. The angle sandwiched by the inner direction (ie, relative to the plane of the layer) is changed to 35°. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film thus obtained.

On the other hand, the coating thickness of the liquid crystal composition is changed to change the thickness of the first unit cured layer and the second unit cured layer, and the temperature at the time of orientation is further changed to 130 ° C, whereby liquid crystal is formed in a specific cross section of the liquid crystal cured layer. The angle of the slow axis of the cured layer with respect to the in-plane direction of the liquid crystal cured layer (that is, with respect to the plane of the layer) was changed to 25°. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film thus obtained.

The procedure of Example 1 (optical anisotropy) was carried out except that the first film sheet and the second film sheet prepared in the present example were used instead of the first film sheet and the second film sheet prepared in Example 1. The manufacture of the optical anisotropic body was carried out and evaluated in the same manner.

[Embodiment 9]

Example 9 is an example in which "the in-plane retardation corresponding to the liquid crystal cured layer of the first region" and "the in-plane retardation corresponding to the liquid crystal cured layer of the second region" were changed from Example 1. The specific operation of this embodiment 9 is as follows.

The thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 91 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film thus obtained.

On the other hand, the thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 53 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film thus obtained.

The procedure of Example 1 (optical anisotropy) was carried out except that the first film sheet and the second film sheet prepared in the present example were used instead of the first film sheet and the second film sheet prepared in Example 1. The manufacture of the optical anisotropic body was carried out and evaluated in the same manner.

[Embodiment 10]

Example 10 is an example in which "the in-plane retardation corresponding to the liquid crystal cured layer of the first region" and "the in-plane retardation corresponding to the liquid crystal cured layer of the second region" were changed from Example 1. The specific operation of this embodiment 10 is as follows.

The thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 53 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film thus obtained.

On the other hand, the coating thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 91 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film thus obtained.

The procedure of Example 1 (optical anisotropy) was carried out except that the first film sheet and the second film sheet prepared in the present example were used instead of the first film sheet and the second film sheet prepared in Example 1. The manufacture of the optical anisotropic body was carried out and evaluated in the same manner.

[Example 11]

In the eleventh embodiment, the embodiment in which "the in-plane retardation corresponding to the liquid crystal cured layer of the first region" and the "in-plane retardation corresponding to the liquid crystal cured layer of the second region" are changed from the first embodiment. The specific operation of this embodiment 11 is as follows.

The thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 108 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film thus obtained.

On the other hand, the coating thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 38 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film obtained in this regard.

The procedure of Example 1 (optical anisotropy) was carried out except that the first film sheet and the second film sheet prepared in the present example were used instead of the first film sheet and the second film sheet prepared in Example 1. The manufacture of the optical anisotropic body was carried out and evaluated in the same manner.

[Embodiment 12]

Example 12 is an example in which "the in-plane retardation corresponding to the liquid crystal cured layer of the first region" and "the in-plane retardation corresponding to the liquid crystal cured layer of the second region" were changed from Example 1. The specific operation of this embodiment 12 is as follows.

The thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 38 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film thus obtained.

On the other hand, the coating thickness of the liquid crystal composition was changed to change the thickness of the first unit cured layer and the second unit cured layer, whereby the in-plane retardation of the liquid crystal cured layer was changed to 108 nm. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film thus obtained.

The procedure of Example 1 (optical anisotropy) was carried out except that the first film sheet and the second film sheet prepared in the present example were used instead of the first film sheet and the second film sheet prepared in Example 1. The manufacture of the optical anisotropic body was carried out and evaluated in the same manner.

[Example 13]

Example 13 is an example of producing an optically anisotropic layer containing no binder layer and containing only a liquid crystal cured layer. The specific operation of this embodiment 13 is as follows.

As in Example 1, the non-slip-treated surface of the PET film as a supporting substrate was subjected to a rubbing treatment. Thereafter, the liquid crystal composition produced in Example 1 was applied to the rubbed surface of the PET film using a wire bar to form a liquid crystal composition layer. The liquid crystal composition layer was heated at 135 ° C for 4 minutes to orient the liquid crystalline compound in the layer. Thereafter, the liquid crystal composition layer was irradiated with ultraviolet rays of 500 mJ/cm ² in a nitrogen atmosphere to cure the liquid crystal composition layer to form a first unit cured layer. The surface of the first unit cured layer is subjected to a rubbing treatment. Then, on the rubbing treatment surface of the first unit solidified layer, "the remaining liquid crystal composition used for forming the first unit cured layer" is applied by a wire bar to form a liquid crystal composition layer. The liquid crystal composition layer was heated at 135 ° C for 4 minutes to orient the liquid crystalline compound in the layer. Thereby, an intermediate film having a layer structure of "PET film / first unit cured layer / liquid crystal composition layer" was obtained.

Thereafter, the intermediate film is bent in half. By this bending, the liquid crystal composition layer on one side of the fold line is directly bonded to the liquid crystal composition layer on the other side of the fold line. In the following description, a portion of the intermediate film on one side of the fold line may be referred to as a "first portion", and a portion of the intermediate film located on the other side of the fold line may be referred to as a "second portion". The bending is performed such that the in-plane slow axis of the first unit cured layer and the liquid crystal composition layer of the first portion and the in-plane slow axis of the first unit cured layer and the liquid crystal composition layer of the second portion are parallel.

Thereafter, the liquid crystal composition layer was irradiated with ultraviolet rays of 500 mJ/cm ² in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby obtaining a liquid crystal cured layer as an optically anisotropic layer. The liquid crystal cured layer has a "first unit cured layer of the first portion / a liquid crystal composition layer of the first portion is cured to obtain a second unit cured layer / a liquid crystal composition layer of the second portion is cured to obtain a second unit cured layer / The layer structure of the first unit cured layer of the second part. The portion of the "first unit cured layer of the first portion/the second unit cured layer obtained by curing the liquid crystal composition layer of the first portion" corresponds to the first region. Further, the portion of the "second unit cured layer obtained in the second portion of the liquid crystal composition layer and the first unit cured layer of the second portion" corresponds to the second region.

Thereafter, the PET film in the range of the first region of the liquid crystal cured layer is peeled off. The surface of the first region of the liquid crystal cured layer which has been peeled off by peeling off the PET film and the optically isotropic resin film are bonded together by the above-mentioned adhesive. Then, the remaining range of the PET film was peeled off to obtain an optical anisotropic body having a layer structure of "resin film/adhesive layer/optical anisotropic layer".

The obtained optical anisotropic body was evaluated by the above method. Further, evaluation of the liquid crystal cured layer included in the optical anisotropic body was also performed.

[Embodiment 14]

Example 14 is an example in which the "type of liquid crystal compound used" was partially changed from Example 1. The specific operation of this embodiment 14 is as follows.

The type of the liquid crystal compound is changed from the inverse dispersion liquid crystal compound A to the polymerizable reverse dispersion liquid crystal compound C represented by the following formula. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a first intermediate film. The first film sheet is cut from the first intermediate film obtained in this regard.

『化25』

Inverse dispersion liquid crystalline compound C

The same operation as in the procedure of Example 1 (manufacture of an optical anisotropic body) was carried out, except that the first film sheet prepared in the present example was used instead of the first film sheet prepared in Example 1. Production and evaluation of anisotropic bodies.

[Example 15]

Example 15 is an example in which the "type of liquid crystal compound used" was partially changed from Example 1. The specific operation of this embodiment 15 is as follows.

The type of the liquid crystal compound is changed from the inverse dispersion liquid crystal compound A to the inverse dispersion liquid crystal compound C. In addition to the above, the same operation as in the step (manufacture of the liquid crystal composition) and the step (manufacture of the intermediate film including the liquid crystal cured layer) of Example 1 was carried out to obtain a second intermediate film. The second film sheet is cut from the second intermediate film thus obtained.

The same operation as in the procedure of Example 1 (manufacture of an optical anisotropic body) was carried out, except that the second film sheet prepared in the present example was used instead of the second film sheet prepared in Example 1. Production and evaluation of anisotropic bodies.

[Example 16]

Example 16 is an example in which "the type of the liquid crystalline compound to be used" was changed from Example 1. The specific operation of this embodiment 16 is as follows.

The same operation as in Example 1 was carried out, except that the type of the liquid crystal compound was changed from the inverse dispersion liquid crystal compound A to the reverse dispersion liquid crystal compound C, and the optical anisotropic body was produced and evaluated.

[Example 17]

Example 17 is an example in which the "in-plane retardation of the entire optically anisotropic layer" was changed from Example 1. The specific operation of this embodiment 17 is as follows.

The in-plane retardation of the liquid crystal cured layer was changed to 139 nm by changing the coating thickness of the liquid crystal composition to change the first unit cured layer and the second unit cured layer. Except for the above, the same operation as in Example 1 was carried out to produce and evaluate an optical anisotropic body.

[Comparative Example 1]

0.30 part by weight of a fluorine-based surfactant ("F562" manufactured by DIC Corporation) was used instead of 0.15 parts by weight of a fluorine-based surfactant ("S420" manufactured by AGC Seimi Chemical Co., Ltd.). Except for the above, the same operation as in the step (manufacture of the liquid crystal composition) of Example 1 was carried out to obtain a liquid crystal composition.

As in Example 1, the non-slip-treated surface of the PET film as a supporting substrate was subjected to a rubbing treatment. Thereafter, the liquid crystal composition prepared in the present comparative example was applied to the rubbed surface of the PET film by using a wire bar to form a liquid crystal composition layer.

The liquid crystal composition layer was heated at 110 ° C for 4 minutes to orient the liquid crystalline compound in the layer. The above heating conditions correspond to temperature conditions in which the residual component viscosity of the test composition of the liquid crystal composition to be used becomes greater than 800 cP.

Thereafter, the liquid crystal composition layer was irradiated with ultraviolet rays of 500 mJ/cm ² in a nitrogen atmosphere to cure the liquid crystal composition layer, thereby obtaining a liquid crystal cured layer having a thickness of 1.0 μm.

Thereby, an intermediate film having a PET film and a liquid crystal cured layer was obtained. The liquid crystal cured layer was evaluated by the above method using the obtained intermediate film.

An optical anisotropic body was produced in the same manner as in the step (manufacture of an optical anisotropic body) of Example 1, except that the intermediate film prepared in the present comparative example was used instead of the intermediate film prepared in Example 1. Manufacturing and evaluation.

[result]

The results of the foregoing examples and comparative examples are disclosed in Tables 1 and 2 below. In the following tables, the meaning of the abbreviation is as follows.
Empty/empty: a surface corresponding to the air side of the liquid crystal cured layer of the first region and the air side of the liquid crystal cured layer corresponding to the second region.
Base/empty: a surface corresponding to the air side surface of the liquid crystal cured layer of the first region and the surface of the PET film side corresponding to the liquid crystal cured layer of the second region.
Base/base: a surface conforming to the surface of the PET film side of the liquid crystal cured layer of the first region and the surface of the PET film side corresponding to the liquid crystal cured layer of the second region.
Liquid crystal "A": inverse dispersion liquid crystal compound A.
Liquid crystal "B": cis-dispersion liquid crystal compound B.
Liquid crystal "C": inverse dispersion liquid crystal compound C.
Θ1: the angle between the slow axis of the first region of the optically anisotropic layer relative to the in-plane direction of the optically anisotropic layer (ie, relative to the plane of the layer) in a particular section of the optically anisotropic layer .
T1: thickness of the first region of the optically anisotropic layer.
Re1: In-plane retardation of the first region of the optically anisotropic layer.
Wavelength dispersion "reverse": inverse wavelength dispersion.
Wavelength dispersion "shun": chromatic wavelength dispersion.
Θ2: the angle between the slow axis of the second region of the optically anisotropic layer relative to the in-plane direction of the optically anisotropic layer (ie, relative to the plane of the layer) in a particular section of the optically anisotropic layer .
T2: thickness of the second region of the optically anisotropic layer.
Re2: In-plane retardation of the second region of the optically anisotropic layer.
Δθ: the angle between the slow axis of the first region and the slow axis of the second region in a particular section of the optically anisotropic layer.

"Table 1"
[Table 1. Structure of Examples and Comparative Examples]
*1: The in-plane retardation of the entire optically anisotropic layer of Example 13 was 140 nm.
*2: The entire optically anisotropic layer of Example 13 has reverse wavelength dispersion.

"Table 2"
[Table 2. Results of Examples and Comparative Examples]

[discuss]

As can be seen from Table 1, in the case where the intersection angle Δθ of the "first slow axis of the first region" and the "second slow axis of the second region" in the specific section is within the specified range, the optical anisotropic layer can be suppressed. The direction dependence of the delay in the oblique direction. Therefore, excellent reflection suppression capability can be achieved in either of the orientation perpendicular to the in-plane slow axis and the orientation perpendicular to the in-plane fast axis. Therefore, it has been confirmed from the results of the examples that the optical anisotropic body according to the present invention can realize a polarizing plate capable of suppressing the direction dependence of the reflection suppressing ability in the oblique direction.

10‧‧‧ Optical anisotropic body

20‧‧‧ Optical anisotropic body

100‧‧‧ Optical anisotropic layer

100E‧‧‧ evaluation profile

100S‧‧‧Specific profile

110‧‧‧First area

111‧‧‧Molecular molecules of liquid crystal compounds

120‧‧‧Second area

121‧‧‧Molecular molecules of liquid crystal compounds

200‧‧‧ Optical anisotropic layer

200S‧‧‧Specific profile

230‧‧‧Non-liquid crystal area

A1‧‧‧In-plane slow axis

A2‧‧‧In-plane fast axis

A3‧‧‧ thickness direction

A4‧‧‧ tilt direction

A5‧‧‧ position

A6‧‧‧Inside direction

A110‧‧‧First slow axis

A120‧‧‧second slow axis

A130‧‧‧ slow axis

A140‧‧‧ slow axis

Φ1‧‧‧ polar angle

Φ2‧‧‧ azimuth

Fig. 1 is a perspective view showing an optical anisotropic body according to a first embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view showing an optically anisotropic layer of an optical anisotropic body according to a first embodiment of the present invention.

Fig. 3 is a perspective view showing a portion of an optically anisotropic layer as an example of a plane cut parallel to the in-plane slow axis and not parallel to the thickness direction.

Fig. 4 is a schematic cross-sectional view showing an optically anisotropic layer of an optical anisotropic body according to a first embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view showing an optically anisotropic layer of an optical anisotropic body according to a first embodiment of the present invention.

Fig. 6 is a schematic cross-sectional view showing an optically anisotropic layer of an optical anisotropic body according to a first embodiment of the present invention.

Fig. 7 is a schematic cross-sectional view showing an optically anisotropic layer of an optical anisotropic body according to a first embodiment of the present invention.

Fig. 8 is a perspective view showing an optical anisotropic body according to a second embodiment of the present invention.

Fig. 9 is a schematic cross-sectional view showing an optically anisotropic layer of an optical anisotropic body according to a second embodiment of the present invention.

Claims (11)

An optical anisotropic body comprising an optically anisotropic layer comprising a first region and a second region, wherein the first region and the second region are formed of a cured product of a liquid crystal composition containing a liquid crystal compound and satisfy The following requirements (1) to (3): (1) in the cross section of the optically anisotropic layer parallel to both the slow axis and the thickness direction of the surface of the optically anisotropic layer, the first region has a relative a first slow axis inclined in an in-plane direction of the optically anisotropic layer; (2) in the cross section, the second region has a second slow axis inclined with respect to an in-plane direction of the optically anisotropic layer; (3) In the cross section, the angle Δθ between the first slow axis and the second slow axis is 40° to 80°. The optical anisotropic body according to claim 1, wherein an angle between the in-plane slow axis of the first region and the in-plane slow axis of the second region is 0° to 5°. The optical anisotropic body according to claim 1, wherein in the aforementioned cross section of the optically anisotropic layer, the first slow axis of the first region is opposed to the in-plane direction of the optically anisotropic layer The angle θ1 is 20° to 40°, and in the cross section of the optical anisotropic layer, the angle θ2 of the second slow axis of the second region with respect to the in-plane direction of the optical anisotropic layer is 20°. ~40°. The optical anisotropic body according to claim 1, wherein the in-plane retardation of the optically anisotropic layer at a measurement wavelength of 550 nm is 100 nm or more and 180 nm or less. The optical anisotropic body according to claim 1, wherein the in-plane retardation of the optically anisotropic layer at a measurement wavelength of 550 nm is 240 nm or more and 320 nm or less. The optical anisotropic body according to claim 4, wherein the in-plane retardation of the first region at the measurement wavelength of 550 nm and the in-plane retardation of the second region are both 30 nm or more. The optical anisotropic body according to claim 5, wherein the in-plane retardation of the first region at the measurement wavelength of 550 nm and the in-plane retardation of the second region are both 60 nm or more. The optical anisotropic body according to claim 1, which is a retardation film. The method for producing an optically anisotropic body according to any one of claims 1 to 8, comprising: preparing a cured product of a liquid crystal composition containing a liquid crystalline compound a step of forming the layer body; and a step of bonding the layer body. A method of producing an optically anisotropic body according to any one of claims 1 to 8, comprising: preparing a layer formed of a liquid crystal composition containing a liquid crystalline compound a step of bonding the layer; a step of bonding the layered body; and a step of curing the layered body to be bonded. A polarizing plate comprising the optical anisotropic body according to any one of claims 1 to 8 and a linear polarizing member.