JP7562995B2 - Polymerizable liquid crystal composition, polymer, retardation film and method for producing the same, transfer laminate, optical member and method for producing the same, and display device - Google Patents

Description

The present disclosure relates to a polymerizable liquid crystal composition, a polymer, a retardation film and a method for producing the same, a transfer laminate, an optical member and a method for producing the same, and a display device.

Liquid crystal compounds having a polymerizable group (polymerizable liquid crystal compounds) are used in various optical materials. For example, a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound can be aligned in a liquid crystal state and then polymerized to produce a polymer having uniform orientation. Such a polymer can be used in optical components such as retardation films and polarizing plates required for displays.
When a polymerizable liquid crystal compound is used in such an optical member, the retardation may vary when the optical member is exposed to high temperature conditions for a long period of time, and desired optical characteristics may not be obtained.

Patent Document 1 discloses a polymerizable liquid crystal composition containing a specific polymerizable liquid crystal compound and a specific acidic compound that satisfies a specific pKa value as a polymerizable liquid crystal composition used for forming an optically anisotropic film with excellent durability. This document presumes that the reason for the poor durability is that the ester bond of the polymerizable liquid crystal compound is hydrolyzed under a high temperature or high humidity environment, causing a part of the liquid crystal compound fixed by the polymerizable group to become free and mobile, resulting in a change in birefringence, and describes that the incorporation of the specific acidic compound neutralizes the basic component mixed in the composition system, suppressing the progress of hydrolysis promoted by the presence of the basic component, thereby improving durability.
In addition, Patent Document 2 discloses a polymerizable liquid crystal composition that contains a polymerizable liquid crystal compound with reverse wavelength dispersion and a specific aromatic hydrocarbon compound having a hydroxyl group and an alkoxy group as a polymerizable liquid crystal composition that can produce a retardation film with excellent thermal durability. The document describes that it is presumed that the polymerizable liquid crystal compound with reverse wavelength dispersion is easily attacked by nucleophilic species (presumed to be a basic substance) and that the decomposition product acts as a catalyst to promote the decomposition of the unreacted polymerizable liquid crystal compound, while the specific aromatic hydrocarbon compound with a hydroxyl group and an alkoxy group has a hydroxyl group for neutralizing the basic substance and can be located in the vicinity of the liquid crystal compound, thereby suppressing the above phenomenon.

International Publication No. 2019/163878 JP 2019-56728 A

However, in conventional technology, there is a problem that the improvement in heat resistance is still insufficient, and when a specific additive is added in an amount that improves heat resistance, the orientation of the polymer (cured product) of the polymerizable liquid crystal composition decreases, and improvements are required.

In view of the above-mentioned circumstances, the embodiments of the present disclosure aim to provide a polymerizable liquid crystal composition that has improved heat resistance while suppressing deterioration in alignment, a polymer obtained by polymerizing the polymerizable liquid crystal composition, a retardation film having a retardation layer including a cured product of the polymerizable liquid crystal composition and a method for producing the retardation film, a transfer laminate to which the retardation layer can be transferred, an optical member having the retardation film and a method for producing the retardation film, and a display device.

One embodiment of the present disclosure provides a polymerizable liquid crystal composition containing a polymerizable liquid crystal compound and a morpholine compound containing at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate bond, a phosphate bond, and an amide bond.

One embodiment of the present disclosure provides a polymerizable liquid crystal composition of the present disclosure, which contains the morpholine compound in an amount of 1 part by mass or more and 25 parts by mass or less relative to 100 parts by mass of the total amount of the polymerizable liquid crystal compound and the morpholine compound.

One embodiment of the present disclosure provides a polymer obtained by polymerizing the polymerizable liquid crystal composition of one embodiment of the present disclosure.

One embodiment of the present disclosure provides a retardation film having a retardation layer, the retardation layer containing a cured product of the polymerizable liquid crystal composition of one embodiment of the present disclosure.

One embodiment of the present disclosure relates to a method for producing a polymerizable liquid crystal composition according to the present disclosure, comprising:
a step of at least aligning the polymerizable liquid crystal compound in the formed film of the polymerizable liquid crystal composition;
The present invention provides a method for producing a retardation film, comprising a step of forming a retardation layer by at least polymerizing the polymerizable liquid crystal compound after the alignment step.

One embodiment of the present disclosure includes a retardation layer and a support that supports the retardation layer in a peelable manner,
The retardation layer contains a cured product of the polymerizable liquid crystal composition according to one embodiment of the present disclosure.
A transfer laminate for use in transferring a retardation layer is provided.

One embodiment of the present disclosure provides an optical member having a polarizing plate on the retardation film of one embodiment of the present disclosure.

One embodiment of the present disclosure relates to a method for producing a transfer laminate for transferring a retardation layer, the transfer laminate comprising: a retardation layer; and a support supporting the retardation layer in a peelable manner, the retardation layer containing a cured product of the polymerizable liquid crystal composition according to one embodiment of the present disclosure;
a transfer step of placing a transferee including at least a polarizing plate and the retardation layer of the transfer laminate opposite each other and transferring the transfer laminate onto the transferee;
a peeling step of peeling the support from the transfer laminate transferred onto the transfer recipient;
The present invention provides a method for producing an optical member having the above structure.

An embodiment of the present disclosure also provides a display device including the retardation film of the embodiment of the present disclosure or the optical member of the embodiment of the present disclosure.

According to the embodiments of the present disclosure, it is possible to provide a polymerizable liquid crystal composition having improved heat resistance while suppressing deterioration of alignment, a polymer obtained by polymerizing the polymerizable liquid crystal compound or the polymerizable liquid crystal composition, a retardation film having a retardation layer including a cured product of the polymerizable liquid crystal composition and a method for producing the same, a transfer laminate to which the retardation layer can be transferred, an optical member having the retardation film and a method for producing the same, and a display device.

FIG. 1 is a schematic cross-sectional view showing one embodiment of a retardation film. FIG. 2 is a schematic cross-sectional view showing one embodiment of a retardation film. FIG. 3 is a schematic cross-sectional view showing one embodiment of a retardation film. FIG. 4 is a schematic cross-sectional view showing one embodiment of the transfer laminate. FIG. 5 is a schematic cross-sectional view showing one embodiment of a transfer laminate. FIG. 6 is a schematic cross-sectional view showing one embodiment of a transfer laminate. FIG. 7 is a schematic cross-sectional view showing an embodiment of an optical member. FIG. 8 is a schematic cross-sectional view showing an embodiment of a display device.

Hereinafter, the embodiments and examples of the present disclosure will be described with reference to the drawings. However, the present disclosure can be implemented in many different forms, and is not to be interpreted as being limited to the description of the embodiments and examples exemplified below. In addition, in order to make the explanation clearer, the drawings may be schematic in terms of the width, thickness, shape, etc. of each part compared to the actual form, but these are merely examples and do not limit the interpretation of the present disclosure. In addition, in this specification and each figure, elements similar to those described above with respect to the previous figures may be given the same reference numerals, and detailed explanations may be omitted as appropriate. In addition, for convenience of explanation, the terms "upper" and "lower" may be used in the explanation, but the up-down direction may be reversed.
"In this specification, when a certain component, region, or other structure is described as being "on (or under)" another component, region, or other structure, unless otherwise specified, this includes not only the case where the component is directly on (or directly under) the other structure, but also the case where the component is above (or below) the other structure, i.e., the case where another component is included between the component and the component, above (or below) the other structure.

In the present disclosure, the alignment regulation force refers to the action of aligning liquid crystal compounds in the retardation layer in a specific direction.
In the present disclosure, (meth)acrylic refers to either acrylic or methacrylic, and (meth)acrylate refers to either acrylate or methacrylate.
In addition, in this specification, the terms "plate,""sheet," and "film" are not distinguished from one another solely based on the difference in name, and a "film surface (plate surface, sheet surface)" refers to a surface that coincides with the planar direction of the target film-like (plate-like, sheet-like) member when viewed overall and globally.
In addition, in the present disclosure, the use of "to" indicating a range of numerical values is used to mean that the numerical values before and after it are included as the lower limit and upper limit.

A. Polymerizable Liquid Crystal Composition The polymerizable liquid crystal composition of the present disclosure is a composition containing a polymerizable liquid crystal compound and a morpholine compound including at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate bond, a phosphate bond, and an amide bond.

The polymerizable liquid crystal composition of the present disclosure combines a polymerizable liquid crystal compound with a morpholine compound containing the specific bond, and therefore can provide a polymerizable liquid crystal composition in which the decrease in alignment is suppressed while the heat resistance is improved, and the decrease in retardation value before and after a heat resistance test can be suppressed.
Although the mechanism by which the heat resistance is improved is still unclear, it is presumed that this is due to the fact that, in addition to the polymerization reaction between polymerizable liquid crystal compounds, a polymerization reaction due to a hydrogen abstraction reaction specific to morpholine occurs simultaneously, thereby improving the reaction rate of crosslinking reactions, etc. Since the morpholine compound used in the present invention contains the specific bond, it is presumed that the compound has a high affinity with the reactive group of the polymerizable liquid crystal compound, making it easy to suppress the decrease in alignment and improving the reactivity.

The polymerizable liquid crystal composition of the present disclosure contains at least a polymerizable liquid crystal compound and a morpholine compound containing at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate ester bond, a phosphate ester bond, and an amide bond, and preferably further contains a photopolymerization initiator. It may further contain a liquid crystal compound that does not have a polymerizable functional group. It may further contain other components within a range that does not impair the effect. Below, each component constituting the polymerizable liquid crystal composition of the present disclosure will be described in order, starting with the morpholine compound that is characteristic of the present disclosure.

1. Morpholine Compound The morpholine compound used in the polymerizable liquid crystal composition of the present disclosure is a compound having a morpholine ring and at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate bond, a phosphate bond, and an amide bond.
Examples of the morpholine compound include compounds represented by the following general formula (B) or (B').

（一般式（Ｂ）及び（Ｂ’）において、Ｒ^ａは、置換基を有していてもよく、炭素鎖中にヘテロ原子が含まれていてもよい炭化水素基であって、少なくともエステル結合、チオエステル結合、炭酸エステル結合、リン酸エステル結合、及びアミド結合からなる群から選択される少なくとも１種の結合を含む１価の基を表し、Ｑは、置換基を有していてもよく、炭素鎖中にヘテロ原子が含まれていてもよい炭化水素基であって、少なくともエステル結合、チオエステル結合、炭酸エステル結合、リン酸エステル結合、及びアミド結合からなる群から選択される少なくとも１種の結合を含むｎ価の基を表し、括弧内のモルホリン環をｎ個連結している。ｎは２以上の整数である。）

(In general formulas (B) and (B'), R ^a is a monovalent group which may have a substituent and which may contain a heteroatom in the carbon chain and which contains at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate ester bond, a phosphate ester bond, and an amide bond; Q is a monovalent group which may have a substituent and which may contain a heteroatom in the carbon chain and which contains at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate ester bond, a phosphate ester bond, and an amide bond, and which connects n morpholine rings in parentheses; n is an integer of 2 or more.)

In general formulas (B) and (B'), the hydrocarbon group may be a linear, branched or cyclic saturated or unsaturated aliphatic hydrocarbon group, an aromatic hydrocarbon group, or a combination thereof. The hydrocarbon group may contain a heteroatom such as O (oxygen atom), S (sulfur atom), N (nitrogen atom) or P (phosphorus atom) in the carbon chain, or may be a heterocycle.

Examples of the cyclic aliphatic hydrocarbon group include groups containing cyclohexane, cyclopentane, norbornane, bicyclo[2.2.2]octane, tricyclo[ ^5.2.1.02,6 ]decane, and adamantane, etc. Examples of the aromatic group include groups containing a benzene ring, a naphthalene ring, a fluorene ring, an oxazole ring, a thiazole ring, a thiophene ring, a pyridine ring, a pyrrole ring, a furan ring, and a benzothiazole ring, etc.

Examples of the substituents in general formulae (B) and (B') include halogen atoms such as fluorine atoms, chlorine atoms, and bromine atoms; amino groups, amino groups which may be substituted with alkyl groups such as methylamino groups, dimethylamino groups, diethylamino groups, and diisopropylamino groups; nitro groups, cyano groups, isocyano groups, hydroxy groups, mercapto groups, and polymerizable functional groups. The polymerizable functional group is preferably a group selected from the following formulae (Z-1) to (Z-8). In the following formulae (Z-1) to (Z-8), * (asterisk) indicates the bonding position with the hydrocarbon group.

（式（Ｚ－１）～（Ｚ－８）中、Ｒ^ｚはそれぞれ独立して、水素原子、フッ素原子、塩素原子、臭素原子、ヨウ素原子、メチル基、エチル基、又はトリフルオロメチル基である。）

In formulae (Z-1) to (Z-8), R ^z is each independently a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a methyl group, an ethyl group, or a trifluoromethyl group.

The hydrocarbon group in general formulae (B) and (B') contains at least one bond in the carbon chain selected from the group consisting of an ester bond (-COO-, -OCO-), a thioester bond (-CO-S-, -S-CO-), a carbonate bond (-O-CO-O-), a phosphate bond (O=P(O-) ₃ ), and an amide bond (-CO-NH-, -NH-CO-). The hydrocarbon group may be cyclic and may be contained as a lactone or lactam.
The hydrocarbon group in general formulae (B) and (B') preferably contains at least one bond selected from the group consisting of an ester bond (-COO-, -OCO-) and an amide bond (-CO-NH-, -NH-CO-), and more preferably contains an ester bond (-COO-, -OCO-), from the viewpoints of affinity with a polymerizable liquid crystal compound and ease of synthesis.
The number of carbon atoms in the hydrocarbon group is not particularly limited, but may be 1 to 12, preferably 2 to 10, and more preferably 2 to 6.

From the viewpoint of reaction efficiency, it is preferable that R ^a and Q each have a hydrogen-bonding group as a substituent of a hydrocarbon group or a linking group contained in a carbon chain.
Here, the hydrogen-bonding group refers to a group having at least one hydrogen bonded directly to a heteroatom, and is preferably a group different from an acidic group from the viewpoint of ink stability, and specific examples include an alcoholic hydroxy group, a mercapto group, an amino group, an amide group, etc. The alcoholic hydroxy group refers to a hydroxy group bonded to an aliphatic hydrocarbon group.

In addition, it is preferable that R ^a and Q have a polymerizable functional group as a substituent from the viewpoint of improving the reaction rate with the polymerizable liquid crystal compound. Furthermore, the polymerizable functional group is more preferably a polymerizable functional group capable of reacting with the polymerizable functional group of the polymerizable liquid crystal compound described later.

In addition, it is preferable that R ^a and Q each contain two or more aromatic hydrocarbon groups, since they function as a mesogenic moiety and improve the reaction rate with the polymerizable liquid crystal compound. The two or more aromatic hydrocarbon groups are -O-, -S-, -OCH ₂ -, -CH ₂ O-, -CH ₂ CH ₂ -, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -OCO-NH-, -NH-COO-, -NH-CO-NH-, -NH-O-, -O-NH-, -SCH ₂ -, -CH _{2 S-, -CF 2} O-, -OCF ₂ -, -CF ₂ S-, -SCF ₂ -, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -COO-CH ₂ CH ₂ -, _-OCO -CH ₂ CH ₂ It is preferred that the bonds be -, -CH ₂ CH ₂ -COO-, -CH ₂ CH ₂ -OCO-, -COO-CH ₂ -, -OCO-CH ₂ -, -CH ₂ -COO-, -CH ₂ -OCO-, -CH=CH-, -N=N-, -CH=N-, -N=CH-, -CH=N-N=CH-, -CF=CF-, -C≡C- or a single bond, as they function like a mesogenic moiety and exert the above-mentioned effects.

In general formula (B'), n is an integer of 2 or more. The compound represented by general formula (B') may be a polymer, for example, a polymer formed by polymerizing the polymerizable functional group of the compound represented by general formula (B) having a polymerizable functional group represented by (Z-1) at its terminal. Therefore, n is not limited, but is preferably 10 or less, and more preferably 8 or less, from the viewpoint of being less likely to impede the alignment of the polymerizable liquid crystal compound and making it easier to improve the alignment.

In addition, the number of morpholine rings contained in one molecule of the morpholine compound is not particularly limited. As the number increases, the reaction efficiency and heat resistance are improved. On the other hand, if the number is too large, the alignment of the liquid crystal compound may be affected. Therefore, the number is preferably 1 to 10, more preferably 1 to 8, and even more preferably 1 to 6.
From the standpoint of reaction efficiency and heat resistance, the number of morpholine rings contained in one molecule of the morpholine compound may be three or more.

That is, it is preferable that the morpholine compound contains at least one selected from the group consisting of the following (i) to (iv) from the viewpoint of improving the reaction rate with the polymerizable liquid crystal compound.
(i) a hydrogen-bonding group; (ii) a polymerizable functional group; (iii) two or more aromatic hydrocarbon groups; and (iv) three or more morpholine rings in one molecule.

The molecular weight of the morpholine compound is preferably at least 190 in terms of heat resistance, and more preferably at least 199. On the other hand, the molecular weight of the morpholine compound is preferably at most 2500 in terms of not interfering with the alignment of the polymerizable liquid crystal compound and making it easier to improve the alignment, and more preferably at most 2000, and even more preferably at most 1500.

Specific examples of morpholine compounds that can be used in the present invention include, but are not limited to, the following:

In the present embodiment, in order to obtain a polymerizable liquid crystal composition having sufficient heat resistance, the content ratio of the morpholine compound is preferably 1 part by mass or more, more preferably 2 parts by mass or more, and even more preferably 10 parts by mass or more, relative to 100 parts by mass of the total amount of the polymerizable liquid crystal compound and the morpholine compound. On the other hand, in order to prevent an influence on the alignment property or retardation of the polymerizable liquid crystal compound when the morpholine compound is excessively contained, the content ratio of the morpholine compound is preferably 25 parts by mass or less, and more preferably 20 parts by mass or less, relative to 100 parts by mass of the total amount of the polymerizable liquid crystal compound and the morpholine compound.
In addition, in the present embodiment, from the viewpoint of obtaining a polymerizable liquid crystal composition having sufficient heat resistance, the content ratio of the morpholine compound is preferably 0.9 parts by mass or more, more preferably 1.8 parts by mass or more, and even more preferably 9 parts by mass or more, relative to 100 parts by mass of the solid content of the polymerizable liquid crystal composition. On the other hand, from the viewpoint of the possibility that an excessive content of the morpholine compound may affect the alignment property or retardation of the polymerizable liquid crystal compound, the content ratio of the morpholine compound is preferably 24 parts by mass or less, and more preferably 20 parts by mass or less, relative to 100 parts by mass of the solid content of the polymerizable liquid crystal composition.
In the present disclosure, the solid content refers to all components excluding the solvent. For example, the morpholine compound and a polymerizable liquid crystal compound described below are included in the solid content even if they are in a liquid state.

2. Polymerizable Liquid Crystal Compound In the polymerizable liquid crystal composition of the present disclosure, the polymerizable liquid crystal compound may be appropriately selected from those known in the art. The polymerizable liquid crystal compound may be a general normal dispersion (positive dispersion) polymerizable liquid crystal compound in which the slope of a graph obtained by plotting the wavelength λ of incident light on a retardation film on the horizontal axis and the birefringence on the vertical axis is negative (sagging to the right), a reverse wavelength dispersion polymerizable liquid crystal compound, or a polymerizable liquid crystal compound that does not substantially show wavelength dispersion (flat dispersion or low wavelength dispersion).
Among these, polymerizable liquid crystal compounds having reverse wavelength dispersion and polymerizable liquid crystal compounds having substantially no wavelength dispersion (flat dispersion or low wavelength dispersion) are preferably used because they are susceptible to deterioration due to heat, and polymerizable liquid crystal compounds having reverse wavelength dispersion are preferably used.
For example, examples of compounds exhibiting reverse wavelength dispersion include the polymerizable liquid crystal compounds described in Japanese Patent Nos. 5463666, 4186981, 5962760, 5826759, 6568103, 6427340, and JP-A-2016-166344. Examples of compounds exhibiting flat dispersion include the compounds described in Recueil des Travaux Chimiques des Pays-Bas (1996), 115(6), 321-328.

In the present embodiment, the polymerizable liquid crystal compound is preferably a polymerizable liquid crystal compound having a polymerizable functional group at at least one end of the mesogenic portion, and more preferably a polymerizable liquid crystal compound having a polymerizable functional group at both ends of the mesogenic portion. A polymerizable liquid crystal compound having two or more polymerizable functional groups in one molecule can improve the hardness and durability of the coating film.
Examples of the polymerizable liquid crystal compound used in the present disclosure include a polymerizable liquid crystal compound represented by the following general formula (I).

［一般式（Ｉ）において、ＬＣ^coreは、無置換であるか又は置換基Ｅ^ＬＣ及び置換基Ｘからなる群から選ばれる１つ以上の置換基によって置換されていても良い単環、縮合環又は環集合芳香族基を含む二価の基を表し、Ｒ^１及びＲ^２はそれぞれ独立して、下記一般式（ＩＩ－１）及び（ＩＩ－２）から選ばれる基を表すが、Ｒ^１及びＲ^２の少なくとも１つは下記一般式（ＩＩ－１）から選ばれる基を表す。

[In general formula (I), LC ^core represents a divalent group containing a monocyclic, condensed ring, or ring assembly aromatic group which is unsubstituted or optionally substituted with one or more substituents selected from the group consisting of substituents E ^LC and substituents X, R ¹ and R ² each independently represent a group selected from the following general formulae (II-1) and (II-2), and at least one of R ¹ and R ² represents a group selected from the following general formula (II-1).

{Ｌ^１、Ｌ^２、及びＬ^３はそれぞれ独立して、－Ｏ－、－Ｓ－、－ＯＣＨ_２－、－ＣＨ_２Ｏ－、－ＣＨ_２ＣＨ_２－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＯ－Ｓ－、－Ｓ－ＣＯ－、－Ｏ－ＣＯ－Ｏ－、－ＣＯ－ＮＨ－、－ＮＨ－ＣＯ－、－ＯＣＯ－ＮＨ－、－ＮＨ－ＣＯＯ－、－ＮＨ－ＣＯ－ＮＨ－、－ＮＨ－Ｏ－、－Ｏ－ＮＨ－、－ＳＣＨ_２－、－ＣＨ_２Ｓ－、－ＣＦ_２Ｏ－、－ＯＣＦ_２－、－ＣＦ_２Ｓ－、－ＳＣＦ_２－、－ＣＨ＝ＣＨ－ＣＯＯ－、－ＣＨ＝ＣＨ－ＯＣＯ－、－ＣＯＯ－ＣＨ＝ＣＨ－、－ＯＣＯ－ＣＨ＝ＣＨ－、－ＣＯＯ－ＣＨ_２ＣＨ_２－、－ＯＣＯ－ＣＨ_２ＣＨ_２－、－ＣＨ_２ＣＨ_２－ＣＯＯ－、－ＣＨ_２ＣＨ_２－ＯＣＯ－、－ＣＯＯ－ＣＨ_２－、－ＯＣＯ－ＣＨ_２－、－ＣＨ_２－ＣＯＯ－、－ＣＨ_２－ＯＣＯ－、－ＣＨ＝ＣＨ－、－Ｎ＝Ｎ－、－ＣＨ＝Ｎ－、－Ｎ＝ＣＨ－、－ＣＨ＝Ｎ－Ｎ＝ＣＨ－、－ＣＦ＝ＣＦ－、－Ｃ≡Ｃ－又は単結合を表し、
Ａ^１及びＡ^２はそれぞれ独立して、無置換であるか又は１つ以上の置換基Ｅによって置換されていても良い二価の炭素原子数３～２０の脂環式炭化水素基又は芳香族炭化水素基を表すが、当該脂環式炭化水素基及び芳香族炭化水素基の任意の炭素原子はヘテロ原子に置換されていても良く、
Ｒ^ｓｐ１は、１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－が各々独立して－Ｏ－、－ＣＯＯ－、－ＯＣＯ－、－ＯＣＯ－Ｏ－、－ＣＯ－ＮＨ－、－ＮＨ－ＣＯ－、－ＣＨ＝ＣＨ－又は－Ｃ≡Ｃ－に置き換えられても良い炭素原子数１～２０の直鎖もしくは分岐のアルキレン基又は単結合を表し、Ｚ^１は重合性官能基を表し、
Ｒ^３は、水素原子、フッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、ニトロ基、シアノ基、イソシアノ基、チオイソシアノ基、又は、１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－が各々独立して－Ｏ－、－Ｓ－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＯ－Ｓ－、－Ｓ－ＣＯ－、－Ｏ－ＣＯ－Ｏ－、－ＣＯ－ＮＨ－、－ＮＨ－ＣＯ－、－ＣＨ＝ＣＨ－、－ＣＦ＝ＣＦ－又は－Ｃ≡Ｃ－に置き換えられても良い炭素原子数１～２０の直鎖状又は分岐状アルキル基を表すが、当該アルキル基中の任意の水素原子はフッ素原子に置換されても良い。
ｍ１及びｍ２はそれぞれ独立して０～３の整数を表すが、化合物内のｍ１及びｍ２の少なくとも１つは１以上の整数を表す。}
前記置換基Ｅ^ＬＣは、フッ素原子、塩素原子、臭素原子、ヨウ素原子、ペンタフルオロスルフラニル基、ニトロ基、シアノ基、イソシアノ基、アミノ基、ヒドロキシル基、メルカプト基、メチルアミノ基、ジメチルアミノ基、ジエチルアミノ基、ジイソプロピルアミノ基、トリメチルシリル基、ジメチルシリル基、チオイソシアノ基、これらの置換基によって置換されていても良い炭素原子数１～２０の直鎖状又は分岐状アルキル基、又は、１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－が各々独立して－Ｏ－、－Ｓ－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＯ－Ｓ－、－Ｓ－ＣＯ－、－Ｏ－ＣＯ－Ｏ－、－ＣＯ－ＮＨ－、－ＮＨ－ＣＯ－、－ＣＨ＝ＣＨ－ＣＯＯ－、－ＣＨ＝ＣＨ－ＯＣＯ－、－ＣＯＯ－ＣＨ＝ＣＨ－、－ＯＣＯ－ＣＨ＝ＣＨ－、－ＣＨ＝ＣＨ－、－ＣＦ＝ＣＦ－又は－Ｃ≡Ｃ－に置き換えられても良い炭素原子数１～２０の直鎖状又は分岐状アルキル基を表すが、当該アルキル基中の任意の水素原子はフッ素原子に置換されても良く、或いは、前記置換基Ｅ^ＬＣは－Ｌ^Ｅ－Ｒ^ｓｐＥ－Ｚ^Ｅで表される基を表し、ここで、前記Ｌ^Ｅ、Ｒ^ｓｐＥ、及びＺ^Ｅは、それぞれ、前記一般式（ＩＩ－１）で定義されるＬ^３、Ｒ^ｓｐ１、及びＺ^１と同じ意味を表し、前記置換基Ｘは、前記置換基Ｅ^ＬＣとは異なる任意の置換基を表す。］

{L ¹ , L ² and L ³ are each independently -O-, -S-, -OCH ₂ -, -CH ₂ O-, -CH ₂ CH ₂ -, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -OCO-NH-, -NH-COO-, -NH -CO-NH-, -NH-O-, -O-NH-, -SCH ₂ -, -CH ₂ S-, -CF ₂ O-, -OCF ₂ -, -CF ₂ S-, -SCF ₂ - , -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -COO-CH ₂ CH ₂ -, -OCO- _{CH2CH2- ,} -CH2CH2 _{- COO-} , -CH2CH2- _OCO- , -COO- _CH2- , -OCO- _{CH2- ,} -CH2 _- COO-, —CH ₂ —OCO—, —CH═CH—, —N═N—, —CH═N—, —N═CH—, —CH═N-N═CH—, —CF═CF—, —C≡ represents C- or a single bond,
A ¹ and A ² each independently represent a divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms which may be unsubstituted or substituted with one or more substituents E, or an aromatic represents a hydrocarbon group, and any carbon atom in the alicyclic hydrocarbon group or aromatic hydrocarbon group may be substituted with a heteroatom;
R ^sp1 represents one -CH ₂ - or two or more non-adjacent -CH ₂ - groups each independently representing -O-, -COO-, -OCO-, -OCO-O-, -CO- represents a straight-chain or branched alkylene group having 1 to 20 carbon atoms which may be replaced by NH-, -NH-CO-, -CH=CH- or -C≡C-, or a single bond; Z ¹ represents a polymerizable represents a functional group,
R ³ is a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a pentafluorosulfuranyl group, a nitro group, a cyano group, an isocyano group, a thioisocyano group, or one -CH ₂ - or adjacent Two or more -CH ₂ - groups not containing each other are independently -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O- A straight chain having 1 to 20 carbon atoms which may be replaced by CO-O-, -CO-NH-, -NH-CO-, -CH=CH-, -CF=CF- or -C≡C-. or a branched alkyl group, any hydrogen atom in the alkyl group may be substituted with a fluorine atom.
m1 and m2 each independently represent an integer of 0 to 3, provided that at least one of m1 and m2 in the compound represents an integer of 1 or more.
The substituent E ^LC is a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a pentafluorosulfuranyl group, a nitro group, a cyano group, an isocyano group, an amino group, a hydroxyl group, a mercapto group, a methylamino group, a dimethylamino group, a diethylamino group, a diisopropylamino group, a trimethylsilyl group, a dimethylsilyl group, a thioisocyano group, a linear or branched alkyl group having 1 to 20 carbon atoms which may be substituted by these substituents, or _or two or more non-adjacent -CH ₂ - is independently -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, or -CO-NH -, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF represents a linear or branched alkyl group having 1 to 20 carbon atoms which may be replaced by - or -C≡C-, and any hydrogen atom in the alkyl group may be replaced by a fluorine atom. Alternatively, the substituent E ^LC represents a group represented by -L ^E -R ^spE -Z ^E , where L ^E , R ^spE , and Z ^E are each represented by the general formula (II-1 L ³ , R ^sp1 and Z are defined as ¹ , and the substituent X represents an arbitrary substituent different from the substituent E ^LC .

In the LC ^core , examples of the monocyclic aromatic hydrocarbon ring constituting the monocyclic aromatic group include a benzene ring, and examples of the monocyclic aromatic heterocycle constituting the monocyclic aromatic group include a furan ring, a pyridine ring, a pyrimidine ring, a pyrazine ring, etc. Examples of the fused aromatic hydrocarbon ring constituting the fused aromatic group include a naphthalene ring, an anthracene ring, a phenanthrene ring, etc. Examples of the fused aromatic heterocycle constituting the fused aromatic group include a quinoline ring, an acridine ring, a phenanthridine ring, a benzothiazole ring, a benzoxazole ring, a benzimidazole ring, an aromatic heterocycle of a fused ring that may be possessed by a group represented by Ar in general formula (1) described in JP-A-2010-31223, and an aromatic heterocycle of a fused ring that may be possessed by a group represented by Ar in general formula 1 described in JP-A-2016-081035. The term "ring assembly" refers to a structure in which two rings do not share a common atom and are linked via a bond, and examples of structures constituting ring assembly aromatic groups include structures in which at least two types of rings selected from the group consisting of the monocyclic and condensed aromatic hydrocarbon rings and the monocyclic and condensed aromatic heterocycles are directly linked together. Examples of structures constituting ring assembly aromatic groups having 4 to 16 carbon atoms include biphenyl, 2-phenylnaphthalene, and 1-phenylnaphthalene.
In the divalent group containing a monocyclic, fused ring, or ring assembly aromatic group of the LC ^core , R ¹ and R ² are bonded to the monocyclic, fused ring, or ring assembly aromatic group.
The divalent group containing a monocyclic ring, a fused ring, or a ring assembly aromatic group may be unsubstituted or may be substituted with one or more substituents selected from the group consisting of the substituents E ^LC and the substituents X. The total number of π electrons of the aromatic rings contained in the divalent group containing a monocyclic ring or a fused ring is preferably 12 to 22, more preferably 14 to 22. The total number of π electrons of the aromatic rings contained in the divalent group containing a ring assembly aromatic group is preferably 16 to 64, more preferably 22 to 40.

Examples of the LC ^core include structures represented by the following general formulae (i), (ii) and (iii).

（式中、Ｔ^１は、ＮまたはＣＨを表し、Ｔ^２は、－Ｓ－、－Ｏ－、または、－Ｎ（Ｒ^Ｔａ）－を表し、Ｒ^Ｔａは、水素原子または炭素数１～６のアルキル基を表し、Ｙ^１は、置換基を有してもよい、炭素数６～１２の芳香族炭化水素基、または、炭素数３～１２の芳香族複素環基を表す。
Ｔ^３及びＴ^４は、それぞれ独立に、－Ｏ－、－Ｎ（Ｒ^Ｔｂ）－、－Ｓ－、および、－ＣＯ－からなる群から選択される基を表し、Ｒ^Ｔｂは、水素原子または置換基を表す。Ｘ^１は、水素原子または置換基が結合していてもよい第１４～１６族の非金属原子を表す。
Ｅ^１、Ｅ^２、Ｅ^３、及びＥ^４は、それぞれ独立に、水素原子、置換基Ｅ^ＬＣ、炭素数３～２０の脂環式炭化水素基、又は１価の炭素数６～２０の芳香族炭化水素基を表し、Ｅ^１及びＥ^２、並びに、Ｅ^３及びＥ^４は、それぞれ独立に、互いに結合して芳香環または芳香族複素環を形成してもよい。
Ｊ^２は、Ｎ、又はＣＨを表し、
Ｗ^１は、芳香環を有する炭素原子数２～３０の有機基を表すが、当該芳香環は無置換であるか又は１つ以上の置換基Ｅ^ＬＣによって置換されていても良く、
Ｗ^２は炭素原子数３～２０のアルキル基、炭素原子数３～１２のシクロアルキル基、炭素原子数３～１２のシクロアルケニル基、又は芳香環を有する炭素原子数２～３０の有機基を表し、当該アルキル基、シクロアルキル基、シクロアルケニル基、及び芳香環はそれぞれ、無置換であるか又は１つ以上の置換基Ｅ^ＬＣによって置換されていても良く、当該アルキル基は当該シクロアルキル基又はシクロアルケニル基によって置換されていても良く、当該アルキル基は、１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－が各々独立して－Ｏ－、－Ｓ－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＯ－Ｓ－、－Ｓ－ＣＯ－、－ＳＯ_２－、－Ｏ－ＣＯ－Ｏ－、－ＣＯ－ＮＨ－、－ＮＨ－ＣＯ－、－ＣＨ＝ＣＨ－ＣＯＯ－、－ＣＨ＝ＣＨ－ＯＣＯ－、－ＣＯＯ－ＣＨ＝ＣＨ－、－ＯＣＯ－ＣＨ＝ＣＨ－、－ＣＨ＝ＣＨ－、－ＣＦ＝ＣＦ－又は－Ｃ≡Ｃ－に置き換えられていても良く、当該シクロアルキル基又はシクロアルケニル基中の１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－は各々独立して－Ｏ－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、又は－Ｏ－ＣＯ－Ｏ－に置き換えられていても良い。
置換基Ｅ^ＬＣは前記と同じ意味を表し、ｎ１は０～２の整数を表す。
＊（アスタリスク）は、前記一般式（Ｉ）におけるＲ^１１又はＲ^１２との結合位置を示す。）

(In the formula, T ¹ represents N or CH, T ² represents -S-, -O-, or -N(R ^Ta )-, R ^Ta represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and Y ¹ represents an aromatic hydrocarbon group having 6 to 12 carbon atoms or an aromatic heterocyclic group having 3 to 12 carbon atoms, which may have a substituent.
^T3 and ^T4 each independently represent a group selected from the group consisting of -O-, -N(R ^Tb )-, -S-, and -CO-, where R ^Tb represents a hydrogen atom or a substituent. ^X1 represents a hydrogen atom or a nonmetallic atom of Groups 14 to 16 which may be bonded to a substituent.
E ¹ , E ² , E ³ , and E ⁴ each independently represent a hydrogen atom, a substituent E ^LC , an alicyclic hydrocarbon group having 3 to 20 carbon atoms, or a monovalent aromatic hydrocarbon group having 6 to 20 carbon atoms, and E ¹ and E ² , and E ³ and E ⁴ each independently may bond to each other to form an aromatic ring or an aromatic heterocycle.
^J2 represents N or CH;
W ¹ represents an organic group having 2 to 30 carbon atoms and having an aromatic ring, and the aromatic ring may be unsubstituted or substituted with one or more substituents E ^LC ;
^W2 represents an alkyl group having 3 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, or an organic group having 2 to 30 carbon atoms and an aromatic ring, the alkyl group, the cycloalkyl group, the cycloalkenyl group, and the aromatic ring may each be unsubstituted or substituted with one or more substituents ^ELC , the alkyl group may be substituted with the cycloalkyl group or the cycloalkenyl group, and the alkyl group is one _-CH2- or two or more non-adjacent _-CH2- each independently represent -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, _-SO2 may be replaced by -, -O-CO-O-, -CO-NH-, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF- or -C≡C-, and one -CH ₂ - or two or more non-adjacent -CH ₂ - in the cycloalkyl group or cycloalkenyl group may each independently be replaced by -O-, -CO-, -COO-, -OCO- or -O-CO-O-.
The substituent E ^LC has the same meaning as defined above, and n1 represents an integer of 0 to 2.
* (asterisk) indicates the bonding position with ^R11 or ^R12 in the general formula (I).

In the structures represented by the general formulae (i) and (ii), examples of the aromatic hydrocarbon group having 6 to 12 carbon atoms represented by Y ¹ include aryl groups such as a phenyl group, a 2,6-diethylphenyl group, and a naphthyl group. Examples of the aromatic heterocyclic group having 3 to 12 carbon atoms represented by Y ¹ include heteroaryl groups such as a thienyl group, a thiazolyl group, a furyl group, a benzofuryl group, and a pyridyl group. Examples of the substituent that Y ¹ may have include an alkyl group, an alkoxy group, and a halogen atom.
Examples of the non-metallic atom of Groups 14 to 16 represented by ^X1 include an oxygen atom, a sulfur atom, a nitrogen atom having a substituent, and a carbon atom having a substituent. Specific examples of the substituent include an alkyl group, an alkoxy group, an alkyl-substituted alkoxy group, a cyclic alkyl group, an aryl group (e.g., a phenyl group, a naphthyl group, etc.), a cyano group, an amino group, a nitro group, an alkylcarbonyl group, a sulfo group, a hydroxyl group, etc.

A specific example of the structure represented by the general formula (i) is the structure described in JP-A-2010-31223, a specific example of the structure represented by the general formula (ii) is the structure described in JP-A-2016-081035, and a specific example of the structure represented by the general formula (iii) is the structure described in JP-A-2020-019848.

Among these, from the viewpoint of ease of synthesis, the substituent E ^LC in LC ^core is preferably a fluorine atom, a chlorine atom, a hydroxy group, a mercapto group, a methylamino group, a dimethylamino group, or a linear or branched alkyl group having 1 to 6 carbon atoms in which one -CH ₂ - or two or more non-adjacent -CH ₂ - groups may each be independently replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH- or -NH-CO-.
The number of the substituents E ^LC contained in the LC ^core is not particularly limited.

The substituent X in the LC ^core is an arbitrary substituent different from the substituent E ^LC and is not particularly limited. Examples of the substituent X in the LC ^core include a group containing an aromatic ring, such as a group represented by the general formula (D-1) described in Japanese Patent No. 6473537 and a group represented by -M-D described in JP-A-2019-120945 (wherein M represents -CH=CH-, -N=CH-, -CH=N-, or -N=N-, and D represents a monovalent group containing an indolenine ring structure.) and the like can be mentioned.
The D may include a structure of the following general formula (d), and may further have a substituent, may have a condensed ring including a benzene ring of the following general formula (d), and may include a structure in which any hydrogen atom of the following general formula (d) is substituted with M.

（一般式（Ｄ－１）中、Ｇ^１は水素原子又は炭素原子数１～６のアルキル基を表すが、当該アルキル基は無置換であるか又は１つ以上の前記置換基Ｅ^ＬＣによって置換されていても良く、
Ｑ^１は、芳香族炭化水素基を有する炭素原子数２～３０の有機基を表すが、当該芳香族炭化水素基の任意の炭素原子はヘテロ原子に置換されていても良く、芳香族炭化水素基は無置換であるか又は１つ以上の前記置換基Ｅ^ＬＣによって置換されていても良く、
Ｊ^１は、－Ｏ－、－Ｓ－、－ＣＯＯ－、－ＯＣＯ－、－ＯＣＯ－Ｏ－、－ＮＱ^２－、－Ｎ＝ＣＱ^２－、－ＣＯ－ＮＱ^２－、－ＯＣＯ－ＮＱ^２－又は－Ｏ－ＮＱ^２－を表し、Ｑ^２は水素原子、炭素原子数１～２０のアルキル基、炭素原子数３～１２のシクロアルキル基、炭素原子数３～１２のシクロアルケニル基、芳香族炭化水素基（当該芳香族炭化水素基の任意の炭素原子はヘテロ原子に置換されていても良い）を有する炭素原子数２～３０の有機基、又は－（Ｌ^６－Ａ^５）_ｑ－Ｌ^７－Ｒ^ｓｐ２－Ｚ^２を表し、当該アルキル基、シクロアルキル基、シクロアルケニル基、及び芳香族炭化水素基はそれぞれ、無置換であるか又は１つ以上の前記置換基Ｅ^ＬＣによって置換されていても良く、当該アルキル基は当該シクロアルキル基又はシクロアルケニル基によって置換されていても良く、当該アルキル基中の１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－は各々独立して－Ｏ－、－Ｓ－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、－ＣＯ－Ｓ－、－Ｓ－ＣＯ－、－ＳＯ_２－、－Ｏ－ＣＯ－Ｏ－、－ＣＯ－ＮＨ－、－ＮＨ－ＣＯ－、－ＣＨ＝ＣＨ－ＣＯＯ－、－ＣＨ＝ＣＨ－ＯＣＯ－、－ＣＯＯ－ＣＨ＝ＣＨ－、－ＯＣＯ－ＣＨ＝ＣＨ－、－ＣＨ＝ＣＨ－、－ＣＦ＝ＣＦ－又は－Ｃ≡Ｃ－に置き換えられても良く、当該シクロアルキル基又はシクロアルケニル基中の１個の－ＣＨ_２－又は隣接していない２個以上の－ＣＨ_２－は各々独立して－Ｏ－、－ＣＯ－、－ＣＯＯ－、－ＯＣＯ－、又は－Ｏ－ＣＯ－Ｏ－に置き換えられても良く、Ｌ^６、Ａ^５、Ｌ^７、Ｒ^ｓｐ２、及びＺ^２は、それぞれ、前記Ｌ^１、Ａ^１、Ｌ^３、Ｒ^ｓｐ１、及びＺ^１で定義されるものと同一のものを表すが、それぞれ前記Ｌ^１、Ａ^１、Ｌ^３、Ｒ^ｓｐ１、及びＺ^１と同一であっても異なっていても良く、ｑは０～４の整数を表し、Ｌ^６、及びＡ^５がそれぞれ複数存在する場合は、各々同一であっても異なっていても良い。）

In the general formula (D-1), G ¹ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and the alkyl group may be unsubstituted or substituted with one or more of the substituents E ^LC .
^Q1 represents an organic group having 2 to 30 carbon atoms and having an aromatic hydrocarbon group, any carbon atom of the aromatic hydrocarbon group may be substituted with a heteroatom, and the aromatic hydrocarbon group may be unsubstituted or substituted with one or more of the substituents ^ELC ;
J ¹ represents -O-, -S-, -COO-, -OCO-, -OCO-O-, -NQ ² -, -N═CQ ² -, -CO-NQ ² -, -OCO-NQ ² - or -O-NQ ² -; Q ² represents a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, a cycloalkyl group having 3 to 12 carbon atoms, a cycloalkenyl group having 3 to 12 carbon atoms, an organic group having 2 to 30 carbon atoms and an aromatic hydrocarbon group (any carbon atom of the aromatic hydrocarbon group may be substituted with a heteroatom), or -(L ⁶ -A ⁵ ) _q -L ⁷ -R ^sp2 -Z ² ; the alkyl group, cycloalkyl group, cycloalkenyl group and aromatic hydrocarbon group are each unsubstituted or have one or more of the substituents E L 6 may be substituted by ^LC , the alkyl group may be substituted by the cycloalkyl group or cycloalkenyl group, one -CH ₂ - or two or more non-adjacent -CH ₂ - in the alkyl group may be independently replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -SO ₂ -, -O-CO-O-, -CO-NH-, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF- or -C≡C-, one -CH ₂ - or two or more non-adjacent -CH ₂ ^- in the cycloalkyl group or cycloalkenyl group may be independently replaced by -O-, -CO-, -COO-, -OCO- or -O-CO-O-, , A ⁵ , L ⁷ , R ^sp2 and Z ² are the same as those defined for L ¹ , A ¹ , L ³ , R ^sp1 and Z ¹ , respectively, but may be the same as or different from L ¹ , A ¹ , L ³ , R ^sp1 and Z ¹ , respectively, q represents an integer of 0 to 4, and when a plurality of L ⁶ and A ⁵ are present, they may be the same as or different from each other.

(In general formula (d), R ^d1 and R ^d2 each independently represent an alkyl group having 1 to 20 carbon atoms, which alkyl group may be unsubstituted or substituted by one or more of the substituents E ^LC , and one -CH ₂ - or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -SO ₂ -, -O-CO-O-, -CO-NH-, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF- or -C≡C-, or R ^d1 and R ^d2 may be bonded to each other to form a 3- to 7-membered non-aromatic hydrocarbon ring, which may be unsubstituted or substituted with one or more of the substituents ^ELC , and any carbon atom of the non-aromatic hydrocarbon ring may be substituted with a heteroatom.

Specific examples of the group represented by the general formula (D-1) include the structure described in Japanese Patent No. 6473537, and specific examples of the group represented by -MD include the structure described in JP-A-2019-120945.
The number of the substituents X in the LC ^core is not particularly limited, but the number of the group represented by the general formula (D-1) described in Japanese Patent No. 6473537 and the group represented by the -M-D described in JP-A-2019-120945 is preferably 1 or 2, since the polymerizable liquid crystal compound is likely to have the desired flat wavelength dispersion or reverse wavelength dispersion. In addition, when the substituents X in the LC ^core are bonded to each other to form a ring, the number of the rings in the LC ^core is preferably 1 or 2, and more preferably 1.

In the LC ^core , the ring structure of the single ring, condensed ring, or ring assembly aromatic group substituted with the group represented by the general formula (D-1) described in Japanese Patent No. 6473537 and the group represented by -M-D described in JP-A-2019-120945 is preferably benzene, naphthalene, or biphenyl from the viewpoint of ease of raw material procurement, preferably benzene from the viewpoint of wavelength dispersion, and preferably biphenyl from the viewpoint of improving the alignment and birefringence between molecules. By using a polymerizable liquid crystal compound with a large birefringence (Δn), it is possible to realize a retardation in a thin film.

In general formulae (II-1) and (II-2), L ¹ , L ² and L ³ each independently represent -O-, -S-, -OCH ₂ -, -CH ₂ O-, -CH ₂ CH ₂ -, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -OCO-NH-, -NH-COO-, -NH-CO-NH-, -NH-O-, -O-NH-, -SCH ₂ -, -CH ₂ S-, -CF ₂ O-, -OCF ₂ -, -CF ₂ S-, -SCF ₂ -, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -COO-CH ₂ CH ₂ -, -OCO- _{CH 2 CH 2 -, -CH 2 CH 2 -COO-, -CH 2 CH 2 -OCO-, -COO-CH 2 -, -OCO-CH 2 -, -CH 2 -COO- , -CH 2 -OCO- , -CH = CH-} , -N=N-, -CH=N-, -N=CH-, -CH=N-N=CH-, -CF=CF-, -C≡C- or a single bond. When L ¹ and L ² each independently appear multiple times, they may be the same or different.

More specifically, from the viewpoints of orientation, availability of raw materials, and ease of synthesis, ^L1 and ^L2 are each independently -O-, -S-, -COO-, -OCO-, -OCH ₂ -, -CH ₂ O-, -CF ₂ O-, -OCF ₂ -, -CH ₂ CH ₂ -, -CF ₂ CF ₂ -, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -COO-CH ₂ CH ₂ -, -OCO-CH ₂ CH ₂ -, -CH ₂ CH ₂ -COO-, -CH ₂ CH ₂ It is preferable that it represents -OCO-, -CH=CH-, -CF=CF-, -C≡C- or a single bond, more preferably -O-, -S-, -COO-, -OCO-, -OCH ₂ -, _{-CH 2 O-, -CF 2 O-, -OCF 2 -, -CH 2 CH 2 -, -COO-CH 2 CH 2 -, -OCO-CH 2 CH 2 - , -CH 2 CH 2 -COO- , -CH 2 CH 2} -OCO-, -CH=CH-, -C≡C- or a single bond, and further preferably -O-, -S-, -COO-, -OCO-, -OCH ₂ - or -CH ₂ O-. Among them, when Q described later represents a group selected from the general formulae (3-1) to (3-4), it is particularly preferable that the atom bonded to the LC ^core in at least one of L ¹ and L ² is an oxygen atom.

More specifically, from the viewpoint of availability of raw materials and ease of synthesis, it is preferable that ^L3 each independently represent -O-, -S-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -CH ₂ CH ₂ -COO-, -CH ₂ CH ₂ -OCO- or a single bond, and it is more preferable that L3 each independently represent -O-, -COO-, -OCO-, -O-CO-O- or a single bond, and when a plurality of L3s are present, they may be the same or different.

In the general formulas (II-1) and (II-2), A ¹ and A ² each independently represent a divalent alicyclic hydrocarbon group or aromatic hydrocarbon group having 3 to 20 carbon atoms, which may be unsubstituted or substituted with one or more substituents E, and any carbon atom in the alicyclic hydrocarbon group or aromatic hydrocarbon group may be substituted with a heteroatom, more specifically, any carbon atom in the alicyclic hydrocarbon group or aromatic hydrocarbon group may be substituted with an oxygen atom, a sulfur atom or a nitrogen atom. The aromatic hydrocarbon group may be an aromatic heterocyclic group, may have a condensed ring structure, or may have a structure in which an alicyclic hydrocarbon group and an aromatic hydrocarbon group are condensed. When A ¹ and A ² each independently appear in a plurality of instances, they may be the same or different.

Examples of divalent alicyclic hydrocarbon groups having 3 to 20 carbon atoms include divalent cycloalkanediyl groups having 3 to 20 carbon atoms and divalent alicyclic fused ring groups having 10 to 20 carbon atoms.

Examples of the divalent cycloalkanediyl group having 3 to 20 carbon atoms include a cyclopropanediyl group; cyclobutanediyl groups such as a cyclobutane-1,2-diyl group and a cyclobutane-1,3-diyl group; cyclopentanediyl groups such as a cyclopentane-1,2-diyl group and a cyclopentane-1,3-diyl group; cyclohexane-1,2-diyl group, cyclohexane-1,3-diyl group, cyclohexane-1,4-diyl group, cyclohexanediyl groups such as cyclohexanediyl group; cycloheptanediyl groups such as cycloheptane-1,2-diyl group, cycloheptane-1,3-diyl group, and cycloheptane-1,4-diyl group; cyclooctanediyl groups such as cyclooctane-1,2-diyl group, cyclooctane-1,3-diyl group, cyclooctane-1,4-diyl group, and cyclooctane-1,5-diyl group; cyclodecane-1,2-diyl group cyclodecanediyl groups such as cyclodecane-1,3-diyl group, cyclodecane-1,4-diyl group, and cyclodecane-1,5-diyl group; cyclododecanediyl groups such as cyclododecane-1,2-diyl group, cyclododecane-1,3-diyl group, cyclododecane-1,4-diyl group, and cyclododecane-1,5-diyl group; cyclotetradecanediyl groups such as cyclotetradecane-1,2-diyl group, cyclotetradecane-1,3-diyl group, cyclotetradecane-1,4-diyl group, cyclotetradecane-1,5-diyl group, and cyclotetradecane-1,7-diyl group; cycloeicosanediyl groups such as cycloeicosane-1,2-diyl group and cycloeicosane-1,10-diyl group; and the like, and the cycloalkanediyl group may be unsubstituted or substituted with one or more substituents E.
In the cycloalkanediyl group, any carbon atom may be substituted with an oxygen atom, a sulfur atom or a nitrogen atom, and examples thereof include a tetrahydropyran-2,5-diyl group, a 1,3-dioxane-2,5-diyl group, and a tetrahydrothiopyran-2,5-diyl group.

Examples of divalent alicyclic fused ring groups having 10 to 20 carbon atoms include decalindiyl groups such as decahydronaphthalene-2,5-diyl, decahydronaphthalene-2,6-diyl, and decahydronaphthalene-2,7-diyl; adamantanediyl groups such as adamantane-1,2-diyl and adamantane-1,3-diyl; and bicyclo[2.2.1]heptane-2,3-diyl, bicyclo[2.2.1]heptane-2,5-diyl, and bicyclo[2.2.1]heptane-2,6-diyl; and the like. The alicyclic fused ring groups may be unsubstituted or substituted with one or more substituents E. In addition, any carbon atom in the alicyclic fused ring group may be substituted with an oxygen atom, a sulfur atom, or a nitrogen atom.

Among these, from the viewpoint of improving the liquid crystallinity and facilitating the improvement of the alignment of the polymer, an alicyclic hydrocarbon group having 3 to 12 carbon atoms, which may be unsubstituted or substituted with one or more substituents E, is preferred, a cycloalkanediyl group having 3 to 12 carbon atoms is preferred, a cyclopentane-1,3-diyl group, a cyclohexane-1,4-diyl group, a cycloheptane-1,4-diyl group, or a cyclododecane-1,5-diyl group, which may be unsubstituted or substituted with one or more substituents E, is more preferred, and a cyclohexane-1,4-diyl group, which may be unsubstituted or substituted with one or more substituents E, is particularly preferred.

The divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms may exist as cis- or trans-stereoisomers based on the difference in the stereochemical configuration of the carbon atom bonded to L ¹ or L ³ (or L ² ). The divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms may be either cis- or trans-type, or may be an isomer mixture of cis- and trans-type, but is preferably either trans- or cis-type, with the trans-type being more preferred, since this provides good orientation.

In addition, examples of divalent aromatic hydrocarbon groups that may be substituted with heteroatoms include divalent aromatic hydrocarbon groups having 6 to 20 carbon atoms that may be substituted with heteroatoms. Examples of aromatic hydrocarbon rings that constitute the aromatic hydrocarbon groups that may be substituted with heteroatoms include a benzene ring, a naphthalene ring, an anthracene ring, and a phenanthrene ring, and examples of aromatic heterocycles include a furan ring, a pyridine ring, a pyrimidine ring, and a pyrazine ring.

In ^A1 and ^A2 , examples of the divalent aromatic hydrocarbon group having 6 to 20 carbon atoms which may be substituted with a heteroatom include a benzene-1,4-diyl group (1,4-phenylene group), a pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a pyrazine-2,5-diyl group, a naphthalene-2,6-diyl group, a naphthalene-1,4-diyl group, a phenanthrene-2,7-diyl group, a 9,10-dihydrophenanthrene-2,7-diyl group, and a fluorene-2,7-diyl group, and the aromatic hydrocarbon group may be unsubstituted or substituted with one or more substituents E.

^A1 and ^A2 are each independently preferably a benzene-1,4-diyl group, a cyclopentane-1,3-diyl group, a cyclohexane-1,4-diyl group, a cycloheptane-1,4-diyl group, a cyclododecane-1,5-diyl group, a pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a naphthalene-2,6-diyl group, a naphthalene-1,4-diyl group, a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, a decahydronaphthalene-2,6-diyl group, or a 1,3-dioxane-2,5-diyl group, which may be unsubstituted or substituted with one or more substituents E, in terms of improving the alignment and making it easier to suppress a decrease in the alignment of the liquid crystal compound.

^A1 and ^A2 are each independently preferably a benzene-1,4-diyl group, a naphthalene-2,6-diyl group, or a cyclohexane-1,4-diyl group, which may be unsubstituted or substituted by one or more substituents E, more preferably a benzene-1,4-diyl group or a cyclohexane-1,4-diyl group, and particularly preferably a benzene-1,4-diyl group. When these groups are used, it becomes easy to improve the alignment property of the polymerizable liquid crystal compound of this embodiment.

m1 and m2 each independently represent an integer of 0 to 3, and at least one of m1 and m2 in the compound represents an integer of 1 or more. Therefore, in addition to the LC ^core , at least one of ^A1 and ^A2 is included in the main chain via at least one of ^L1 and ^L2 , and the polymerizable liquid crystal compound of the present embodiment has a mesogen moiety.
When importance is placed on the alignment property of the polymerizable liquid crystal compound of the present embodiment, it is preferable that one or both of m1 and m2 are integers of 1 to 3, more preferably that both of m1 and m2 are integers of 1 to 3, and one or both of m1 and m2 may be 1 or 2.
When importance is attached to the alignment property of the polymerizable liquid crystal compound of the present embodiment, the sum of m1 and m2 is preferably 2 or more, and may be 5 or less, or may be 4 or less, from the viewpoint of solvent solubility.

In general formula (II-1), R ^sp1 represents a linear or branched alkylene group having 1 to 20 carbon atoms in which one -CH ₂ - or two or more non-adjacent -CH ₂ - groups may each independently be replaced by -O-, -COO-, -OCO-, -OCO-O-, -CO-NH-, -NH-CO-, -CH═CH- or -C≡C-, or a single bond.

Specifically, in general formula (II-1), from the viewpoint of availability of raw materials and ease of synthesis, it is more preferable that R ^sp1 each independently represent a linear or branched alkylene group having 1 to ₁₂ carbon atoms which may be replaced by -O-, -COO-, or -OCO-, or a single bond, further preferably that _R sp1 each independently represent a linear or branched alkylene group having 1 to 12 carbon atoms or a single bond, even more preferably that R sp1 each independently represent a linear or branched alkylene group having 2 to 10 carbon atoms, and particularly preferably that R sp1 each independently represent a linear alkylene group having 2 to 10 carbon atoms, and when there are a plurality of R sp1, they may be the same or different.

In formula (II-1), ^Z1 represents a polymerizable functional group. As the polymerizable functional group, any group used in a conventional polymerizable liquid crystal compound can be used without any restrictions.
The polymerizable functional groups preferably each independently represent a group selected from the following formulae (Z-1) to (Z-8), in which * (asterisk) indicates the bonding position with R ^sp1 .

（式（Ｚ－１）～（Ｚ－８）中、Ｒ^ｚはそれぞれ独立して、水素原子、フッ素原子、塩素原子、臭素原子、ヨウ素原子、メチル基、エチル基、又はトリフルオロメチル基である。）

(In formulas (Z-1) to (Z-8), R ^z is each independently a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a methyl group, an ethyl group, or a trifluoromethyl group.)

In the case where ultraviolet polymerization is performed as the polymerization method, Z ¹ is preferably formula (Z-1), formula (Z-2), formula (Z-3), formula (Z-5) or formula (Z-7), more preferably formula (Z-1), formula (Z-3) or formula (Z-7), still more preferably formula (Z-1), and particularly preferably the case where in formula (Z-1), R ^z is a hydrogen atom, a methyl group or a trifluoromethyl group.

In general formula (II-2), R ³ represents a hydrogen atom, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a pentafluorosulfuranyl group, a nitro group, a cyano group, an isocyano group, a thioisocyano group, or a linear or branched alkyl group having 1 to 20 carbon atoms in which one -CH ₂ - or two or more non-adjacent -CH ₂ - may each be independently replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -CH═CH-, -CF═CF- or -C≡C-, and any hydrogen atom in the alkyl group may be replaced by a fluorine atom.

In general formula (II-2), in terms of orientation and ease of synthesis, R ³ preferably represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, or a linear or branched alkyl group having 1 to 12 carbon atoms in which one -CH ₂ - or two or more non-adjacent -CH ₂ - are each independently substituted by -O-, -COO-, -OCO-, -O-CO-O-, more preferably a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, or a linear alkyl group or linear alkoxy group having 1 to 12 carbon atoms, even more preferably a hydrogen atom, a linear alkyl group or linear alkoxy group having 1 to 12 carbon atoms, and particularly preferably a linear alkyl group or linear alkoxy group having 1 to 12 carbon atoms.

Each of the substituents E independently represents a fluorine atom, a chlorine atom, a bromine atom, an iodine atom, a pentafluorosulfuranyl group, a nitro group, a cyano group, an isocyano group, an amino group, a hydroxy group, a mercapto group, a methylamino group, a dimethylamino group, a diethylamino group, a diisopropylamino group, a trimethylsilyl group, a dimethylsilyl group, a thioisocyano group, or one -CH ₂ - or two or more non-adjacent -CH _{2 -} groups. each independently represents a linear or branched alkyl group having 1 to 20 carbon atoms which may be replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF- or -C≡C-, and any hydrogen atom in the alkyl group may be replaced by a fluorine atom; or each substituent E may independently represent a group represented by -L ^E -R ^spE -Z ^E , where L ^E , R ^spE and Z ^E are the same as those defined for L ³ , R ^sp1 and Z ¹ , respectively, and each of L ³ and R ^sp1 and ^Z1 may be the same or different, and when a plurality of the above-mentioned substituents E are present in the compound, they may be the same or different.

In a linear or branched alkyl group having 1 to 20 carbon atoms in which one -CH ₂ - or two or more non-adjacent -CH ₂ - groups may each be independently replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF- or -C≡C-, one -CH ₂ at the terminal to which it is bonded - may be replaced by -O-, -S-, -CO-, -COO-, -OCO-, -CO-S-, -S-CO-, -O-CO-O-, -CO-NH-, -NH-CO-, -CH=CH-COO-, -CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -CH=CH-, -CF=CF- or -C≡C-. That is, the substituent E may be -O-R, -S-R, -CO-R, -COO-R, -OCO-R, -CO-S-R, -S-CO-R, -O-CO-O-R, -CO-NH-R, -NH-CO-R, -CH=CH-COO-R, -CH=CH-OCO-R, -COO-CH=CH-R, -OCO-CH=CH-R, -CH=CH-R, -CF=CF-R or -C≡C-R (wherein R is the linear or branched alkyl group having 1 to 19 carbon atoms in which any hydrogen atom may be substituted with a fluorine atom).

From the viewpoint of liquid crystallinity and ease of synthesis, the substituent E preferably represents a fluorine atom, a chlorine atom, a pentafluorosulfuranyl group, a nitro group, a methylamino group, a dimethylamino group, a diethylamino group, a diisopropylamino group, or a linear or branched alkyl group having 1 to 20 carbon atoms in which any hydrogen atom may be substituted with a fluorine atom and one -CH ₂ - or two or more non-adjacent -CH ₂ - groups may each be independently replaced with a group selected from -O-, -S-, -CO-, _-COO- , -OCO-, -O-CO-O-, -CH═CH-, -CF═CF- or _-C≡C- ; Each - more preferably represents a linear or branched alkyl group having 1 to 12 carbon atoms which may be replaced by a group selected from -O-, -COO-, or -OCO-, and each - is independently a fluorine atom, a chlorine atom, or any hydrogen atom is further preferably a linear or branched alkyl group or alkoxy group having 1 to 12 carbon atoms which may be replaced by a fluorine atom, and particularly preferably a fluorine atom, a chlorine atom, or a linear alkyl group or alkoxy group having 1 to 8 carbon atoms.
In addition, as the substituent E which may substitute ^A1 and ^A2 , particularly as the substituent E which may substitute ^A1 and ^A2 to which ^L3 and ^R3 are bonded, respectively, a group represented by -L ^E -R ^spE -Z ^E is also preferred.

In general formula (II-1), specific examples of -(L ¹ -A ¹ ) _m1 -L ³ -R ^sp1 -Z ¹ include, but are not limited to, groups represented by the following (L1-1) to (L1-184).

In the groups represented by (L1-1) to (L1-184), n in R ^sp1 represents 1 to 20, and among these, n in R ^sp1 is preferably 2 or more, more preferably 4 or more, and on the other hand, is preferably 12 or less, more preferably 10 or less. Furthermore, in Z ¹ , R ^z in formula (Z-1) is each independently preferably a hydrogen atom or a methyl group, more preferably a hydrogen atom.

In general formula (II-2), specific examples of -(L ² -A ² ) _m2 -R ³ include, but are not limited to, the groups represented by the following (L2-1) to (L2-52). In R ³ of the groups represented by the following (L2-1) to (L2-52), R represents a linear or branched alkyl group having 1 to 20 carbon atoms in which any hydrogen atom may be substituted with a fluorine atom, -OR represents an alkoxy group, -OCOR represents an acyloxy group, and -OCOOR represents an alkoxycarbonyloxy group.

The polymerizable liquid crystal compound used in this embodiment is preferably soluble in at least one solvent selected from the group consisting of methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, and cyclohexanone at a concentration of 20% by mass or more, since this improves the solvent solubility of the polymerizable liquid crystal composition. When the solvent solubility of the polymerizable liquid crystal composition is improved, it is easier to form a uniform coating film when forming a coating film using the polymerizable liquid crystal composition, and the load on the manufacturing process and manufacturing equipment for drying the solvent is reduced, the options for usable substrates are expanded, and the liquid crystal phase transition temperature of the composition is expanded, the process margin during alignment is expanded, and the alignment is more uniform and better.

The polymerizable liquid crystal compound used in the present embodiment may be used alone or in combination of two or more kinds.
The content ratio of the polymerizable liquid crystal compound used in this embodiment may be appropriately adjusted in order to adjust the desired retardation, etc., and is not limited thereto. However, it is preferably 70 parts by mass or more and 99 parts by mass or less, more preferably 70 parts by mass or more and 95 parts by mass or less, and even more preferably 72 parts by mass or more and 90 parts by mass or less, relative to 100 parts by mass of the solid content of the polymerizable liquid crystal composition.

3. Photopolymerization initiator In this embodiment, the photopolymerization initiator can be appropriately selected from conventionally known ones and used. Specific examples of such photopolymerization initiators include aromatic ketones including thioxanthone, α-aminoalkylphenones, α-hydroxyketones, acylphosphine oxides, oxime esters, aromatic onium salts, organic peroxides, thio compounds, hexaarylbiimidazole compounds, ketoxime ester compounds, borate compounds, azinium compounds, metallocene compounds, active ester compounds, compounds having a carbon-halogen bond, and alkylamine compounds. Among them, at least one selected from the group consisting of acylphosphine oxide-based polymerization initiators, α-aminoalkylphenone-based polymerization initiators, α-hydroxyketone-based polymerization initiators, and oxime ester-based polymerization initiators is preferred because it hardens to the inside of the coating film and improves durability.

Examples of acylphosphine oxide polymerization initiators include bis(2,4,6-trimethylbenzoyl)-phenyl-phosphine oxide (e.g., trade name: Irgacure 819, manufactured by BASF), bis(2,6-dimethoxybenzoyl)-2,4,4-trimethyl-pentylphenylphosphine oxide, and 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide (trade name: Lucirin TPO, manufactured by BASF, etc.).

Examples of α-aminoalkylphenone polymerization initiators include 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one (e.g., Irgacure 907, manufactured by BASF), 2-benzyl-2-(dimethylamino)-1-(4-morpholinophenyl)-1-butanone (e.g., Irgacure 369, manufactured by BASF), and 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4-morpholinyl)phenyl]-1-butanone (Irgacure 379EG, manufactured by BASF).

Examples of α-hydroxyketone polymerization initiators include 2-hydroxy-1-{4-[4-(2-hydroxy-2-methyl-propionyl)-benzyl]-phenyl}-2-methyl-propan-1-one (e.g., trade name: Irgacure 127, manufactured by BASF, etc.), 2-hydroxy-4'-hydroxyethoxy-2-methylpropiophenone (e.g., trade name: Irgacure 2959, manufactured by BASF, etc.), 1-hydroxy-cyclohexyl-phenyl-ketone (e.g., trade name: Irgacure 184, manufactured by BASF, etc.), and oligo{2-hydroxy-2-methyl-1-[4-(1-methylvinyl)phenyl]propanone} (e.g., trade name: ESACURE ONE, manufactured by Lamberti, etc.).

Examples of oxime ester polymerization initiators include 1,2-octanedione, 1-[4-(phenylthio)-, 2-(O-benzoyloxime)] (product name: Irgacure OXE-01, manufactured by BASF), ethanone, 1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-, 1-(o-acetyloxime) (product name: Irgacure OXE-02, manufactured by BASF), methanone, ethanone, 1-[9-ethyl-6-(1,3-dioxolane, 4-(2-methoxyphenoxy)-9H-carbazol-3-yl]-, 1-(o-acetyloxime) (product name: ADEKA OPT-N-1919, manufactured by ADEKA Corporation).

In the present embodiment, the photopolymerization initiator may be used alone or in combination of two or more.
In this embodiment, the content ratio of the photopolymerization initiator is preferably 0.1 parts by mass or more and 10 parts by mass or less, and more preferably 1 part by mass or more and 8 parts by mass or less, relative to 100 parts by mass of the solid content of the polymerizable liquid crystal composition, in order to promote the curing of the polymerizable compound.

4. Liquid Crystal Compound Having No Polymerizable Functional Group The polymerizable liquid crystal composition of the present embodiment may contain a liquid crystal compound having no polymerizable functional group within a range that does not impair the effect.
As the liquid crystal compound having no polymerizable functional group, a conventionally known liquid crystal compound can be used.
From the viewpoint of compatibility, a side-chain type liquid crystal polymer may be contained.
The side chain liquid crystal polymer contains a mesogen moiety that exhibits liquid crystallinity in the side chain of the polymer. As the side chain liquid crystal polymer, for example, a side chain liquid crystal polymer described in International Publication No. 2018/003498, JP-A 2020-034622, etc. can be appropriately selected and used.

In the present embodiment, the liquid crystal compound having no polymerizable functional group may be used alone or in combination of two or more.
In this embodiment, when a liquid crystal compound not having a polymerizable functional group is contained in the polymerizable liquid crystal composition, the content ratio is preferably 1 part by mass or more and 60 parts by mass or less, and more preferably 5 parts by mass or more and 50 parts by mass or less, relative to 100 parts by mass of the total amount of the polymerizable liquid crystal compound and the liquid crystal compound not having a polymerizable functional group.
In this embodiment, when a liquid crystal compound having no polymerizable functional group is contained in the polymerizable liquid crystal composition, the content ratio thereof is preferably 50 parts by mass or less, and more preferably 45 parts by mass or less, per 100 parts by mass of the solid content of the polymerizable liquid crystal composition.

5. Other Components The polymerizable liquid crystal composition of the present embodiment may further contain other components within a range that does not impair the effect. Specifically, the polymerizable liquid crystal composition may contain a leveling agent, an antioxidant, a polymerization inhibitor, a sensitizer, an antistatic agent, or a solvent from the viewpoint of coatability. In addition, the polymerizable liquid crystal composition may contain a polymerizable compound that does not show liquid crystallinity alone but can adjust retardation, reverse wavelength dispersion, phase transition temperature, hardness, and durability by using it together with a polymerizable liquid crystal compound. These may be appropriately selected from conventionally known materials.

In order to improve the hardness and durability of the coating film, it is preferable to further contain a polymerizable compound having two or more polymerizable functional groups in one molecule. As the polymerizable compound having two or more polymerizable functional groups in one molecule, in addition to the above-mentioned polymerizable liquid crystal compounds, a polymerizable compound having no liquid crystallinity can be used.
As the polymerizable compound having two or more polymerizable functional groups in one molecule, so-called polyfunctional monomers can be used. For example, trimethylolpropane tri(meth)acrylate, tripropylene glycol di(meth)acrylate, diethylene glycol di(meth)acrylate, dipropylene glycol di(meth)acrylate, pentaerythritol tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, 1,6-hexanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate, trimethylolpropane tri(meth)acrylate, ditrimethylolpropane ... Examples of the acrylates include pentaerythritol penta(meth)acrylate, tripentaerythritol octa(meth)acrylate, tetrapentaerythritol deca(meth)acrylate, isocyanuric acid tri(meth)acrylate, isocyanuric acid di(meth)acrylate, polyester tri(meth)acrylate, polyester di(meth)acrylate, bisphenol di(meth)acrylate, diglycerin tetra(meth)acrylate, adamantyl di(meth)acrylate, isobornyl di(meth)acrylate, dicyclopentane di(meth)acrylate, tricyclodecane di(meth)acrylate, ditrimethylolpropane tetra(meth)acrylate, and those modified with PO, EO, or the like. Since the crosslinking reaction proceeds and the durability of the coating film is improved, polymerizable compounds having three or more polymerizable functional groups in one molecule, such as pentaerythritol triacrylate (PETA), dipentaerythritol hexaacrylate (DPHA), pentaerythritol tetraacrylate (PETTA), dipentaerythritol pentaacrylate (DPPA), and trimethylolpropane triacrylate (TMPTA), are preferred.
In the case where a polymerizable compound that does not have liquid crystal properties is used in this embodiment, the content ratio thereof is preferably 40 parts by mass or less, more preferably 30 parts by mass or less, and even more preferably 20 parts by mass or less, relative to 100 parts by mass of the solid content of the polymerizable liquid crystal composition.
In the present embodiment, as the polymerizable compound different from the polymerizable liquid crystal compound of the present disclosure, it is preferable that the polymerizable compound is soluble in at least one solvent selected from the group consisting of methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, and cyclohexanone at a concentration of 20 mass % or more, because the solvent solubility of the polymerizable liquid crystal composition is improved, and when a coating film is formed using the polymerizable liquid crystal composition, a uniform coating film is easily formed, the load on the production process and production equipment for drying the solvent is reduced, and the options for usable substrates are expanded.

As the leveling agent, it is preferable to use a fluorine-based or silicone-based leveling agent. Specific examples of the leveling agent include the Megafac series manufactured by DIC Corporation, the TSF series manufactured by Momentive Performance Materials Japan, and the Futergent series manufactured by Neos Corporation, which are described in JP-A-2010-122325. When a leveling agent is used in this embodiment, the content ratio thereof is preferably 0.001 parts by mass or more and 5 parts by mass or less per 100 parts by mass of the solid content of the polymerizable liquid crystal composition.

The polymerizable liquid crystal composition of this embodiment may contain a solvent as necessary from the viewpoint of coatability. The solvent may be appropriately selected from among conventionally known solvents capable of dissolving or dispersing each component contained in the polymerizable liquid crystal composition. Specific examples include hydrocarbon solvents such as hexane, cyclohexane, and toluene; ketone solvents such as methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, and cyclohexanone; ether solvents such as tetrahydrofuran, 1,3-dioxolane, and propylene glycol monoethyl ether (PGME); halogenated alkyl solvents such as chloroform and dichloromethane; ester solvents such as ethyl acetate and propylene glycol monomethyl ether acetate; amide solvents such as N,N-dimethylformamide and N-methylpyrrolidone; sulfoxide solvents such as dimethyl sulfoxide; and alcohol solvents such as methanol, ethanol, and propanol. In this embodiment, the solvent can be used alone or in combination as a mixed solvent of two or more types.

The polymerizable liquid crystal composition of this embodiment has good heat resistance and alignment properties, and is therefore suitable for use in a variety of applications. The polymerizable liquid crystal composition of this embodiment is suitable for use as a liquid crystal composition, for example, in retardation films and various optical components, as described below.

B. Polymer The polymer of the present disclosure is obtained by polymerizing the polymerizable liquid crystal composition of the present disclosure. The polymerization method can be appropriately selected according to the polymerizable functional group contained in the polymerizable liquid crystal compound of the present disclosure.
A polymer obtained by polymerizing the polymerizable liquid crystal composition of the present disclosure without alignment can be used as, for example, a light scattering plate, a depolarizing plate, or a moire fringe prevention plate.
Furthermore, a polymer obtained by aligning the polymerizable liquid crystal composition of the present disclosure and then polymerizing it has optical anisotropy and is suitably used for retardation films and various optical members described below.

C. Retardation Film The retardation film of the present disclosure is a retardation film having a retardation layer, and the retardation layer is made of a cured product of the polymerizable liquid crystal composition of the present disclosure.
In the retardation film of the present embodiment, the retardation layer is made of a cured product of the polymerizable liquid crystal composition, and therefore, as described above, the deterioration of the alignment is suppressed while the heat resistance is improved.

The layer structure of the retardation film will be described with reference to the drawings. Each of FIGS. 1 to 3 shows an embodiment of the retardation film of the present disclosure. In the example of FIG. 1, an embodiment of the retardation film 10 is a retardation film in which an alignment film 3 and a retardation layer 1 are laminated in this order on a substrate 2. In the example of FIG. 2, an embodiment of the retardation film 10 is a retardation film consisting of only a retardation layer 1. In the example of FIG. 3, an embodiment of the retardation film 10 is a retardation film in which the retardation layer 1 is formed directly on the substrate 2'. The retardation film shown in the example of FIG. 3 may be provided with a means for exerting an alignment regulating force on the surface of the substrate 2' on the side of the retardation layer 1. Here, in the present disclosure, the alignment regulating force refers to the action of aligning the alignment component in the retardation layer in a specific direction.

1. Retardation Layer The retardation layer 1 of the embodiment of the present disclosure is made of a cured product of the polymerizable liquid crystal composition of the present disclosure.
Here, the polymerizable liquid crystal composition of the present disclosure may be similar to that described in the polymerizable liquid crystal composition of the embodiment of the present disclosure, and therefore a description thereof will be omitted here.

The retardation layer is preferably a retardation layer in which the main chain portion having an orientation property of the polymerizable liquid crystal compound contained in the polymerizable liquid crystal composition of the present disclosure is cured in a state in which it is substantially horizontally aligned with respect to the film surface. The cured product of the polymerizable liquid crystal composition of the embodiment of the present disclosure contains a structure in which at least a portion of the polymerizable functional group of the polymerizable liquid crystal compound is polymerized. Since the cured product contains a structure in which at least a portion of the polymerizable functional group of the polymerizable liquid crystal compound is polymerized, the retardation layer of the present embodiment is a retardation layer with improved durability.

The phase difference can be measured using an automatic birefringence measuring device (for example, Oji Scientific Instruments, product name: KOBRA-WR). By irradiating the measurement light perpendicularly or obliquely to the surface of the phase difference layer, the anisotropy that increases or decreases the phase difference of the phase difference layer and the degree of orientation of the liquid crystal in the perpendicular (thickness) direction can be confirmed from a chart of the optical phase difference and the incidence angle of the measurement light.

The fact that the retardation layer contains a structure in which at least a portion of the polymerizable functional group of the polymerizable liquid crystal compound contained in the polymerizable liquid crystal composition of the present disclosure is polymerized can be confirmed by collecting and analyzing material from the retardation layer. NMR, IR, GC-MS, XPS, TOF-SIMS, and combinations of these methods can be used as analytical methods.

The retardation layer may contain other components such as a photopolymerization initiator, a leveling agent, an antioxidant, a polymerization inhibitor, a sensitizer, and an antistatic agent. Components such as a photopolymerization initiator that may be completely decomposed when irradiated with light to cause a reaction of the polymerizable functional group of the polymerizable liquid crystal compound may not be contained in the retardation layer.

The thickness of the retardation layer may be appropriately set depending on the application.
When the retardation film of the present disclosure is used as, for example, a broadband ¼ wavelength plate, the film thickness may be adjusted so that the Re(550) of the obtained retardation film is 113 nm or more and 163 nm or less, preferably 135 nm or more and 140 nm or less, and particularly preferably about 137.5 nm. When the retardation film of the present disclosure is used as a ½ wavelength plate, the film thickness may be adjusted so that the Re(550) of the obtained optical film is 250 nm or more and 300 nm or less, preferably 273 nm or more and 277 nm or less, and particularly preferably about 275 nm.

2. Alignment Film In this specification, the alignment film refers to a layer for aligning the liquid crystal component contained in the retardation layer in a certain direction.
The alignment film used in the embodiment of the present disclosure may be appropriately selected in accordance with the alignment property of the polymerizable liquid crystal compound contained in the polymerizable liquid crystal composition of the embodiment of the present disclosure.
For example, when the polymerizable liquid crystal composition of the embodiment of the present disclosure is to be horizontally aligned, it is preferable to use a horizontal alignment film.
The horizontal alignment film may be any film that, when provided as a coating film, aligns the major axis of the mesogen of the liquid crystal component contained in the retardation layer substantially horizontally with respect to the horizontal alignment film surface (film surface).
As the horizontal alignment film, any of those known in the art can be appropriately selected and used, and examples thereof include alignment films to which an alignment control force has been imparted by a rubbing method, a photo-alignment method, a molding method, etc., and among these, horizontal alignment films to which an alignment control force has been imparted by a rubbing method, a photo-alignment method, or a molding method are preferred.

When the alignment control force is imparted by the rubbing method, a polymer that exerts an alignment control force by rubbing is used for the horizontal alignment film. Examples of such polymers include polyvinyl alcohol, polyimide, polyamide, and derivatives of these, and among these, polyvinyl alcohol is preferred.

The method for forming the horizontal alignment film by the rubbing method may be appropriately selected from conventionally known methods. For example, a coating film containing the above polymer is formed on the transparent substrate, and then the coating film is rubbed with a known rubbing roller or the like to obtain a horizontal alignment film.

When forming a horizontal alignment film by a photo-alignment method, a photo-alignment composition containing a photo-alignment material that exerts an alignment control force by irradiating polarized light is used as the alignment film composition. The photo-alignment material may be a photodimerization type material or a photoisomerization type material. Specifically, for example, cinnamate, coumarin, benzylidenephthalimidine, benzylideneacetophenone, diphenylacetylene, stilbazole, uracil, quinolinone, maleimide, or a polymer having a cinnamylidene acetic acid derivative can be mentioned, and among them, a polymer having at least one of cinnamate and coumarin, and their derivatives are preferably used. Specific examples of such photodimerization materials include the compounds described in JP-A-9-118717, JP-T-10-506420, JP-T-2003-505561, WO2010/150748, and JP-A-2015-151548.

The method for forming a photo-alignment film by the photo-alignment method may be appropriately selected from conventionally known methods. For example, the photo-alignment composition is uniformly applied to the transparent substrate, and the substrate is irradiated with polarized light, and then the entire surface of the coating is irradiated with light to obtain a photo-alignment film.

When the horizontal alignment film is formed by a molding method, the composition for the alignment film may be appropriately selected from those capable of forming the desired fine uneven shape. For example, a molding composition containing an ultraviolet-curable resin, a thermosetting resin, an electron beam curable resin, or the like may be used. Among them, it is preferable to use an ultraviolet-curable resin because it is easy to form the alignment film. Specific examples of ultraviolet-curable resins include the above-mentioned polymerizable monomers and polymerizable oligomers, as well as urethane acrylate, epoxy acrylate, polyester acrylate, polyether acrylate, melamine acrylate, and the like. One type may be used alone, or two or more types may be used in combination.

The method for forming a horizontal alignment film by the mold transfer method may be appropriately selected from conventionally known methods. For example, the mold transfer composition is uniformly applied to the transparent substrate, and the coating film is brought into contact with a mold on which a desired fine unevenness is formed, followed by applying pressure and irradiating with ultraviolet light, thereby obtaining an alignment film imparted with a desired fine unevenness.

The horizontal alignment film may be patterned, and the parts having alignment properties may be arranged in a pattern. As the horizontal alignment film that has been patterned, any known film may be used, and is not particularly limited. Examples of such films include a rubbing alignment film that has been patterned by mask rubbing, a photoalignment film that has been patterned by exposure to light using a mask, and an alignment film that has been patterned by printing or the like.

The thickness of the horizontal alignment film may be appropriately set as long as it can align the polymerizable rod-like liquid crystal compound in the horizontal direction, and is not particularly limited. However, it is usually 1 nm or more, preferably 60 nm or more, and from the viewpoint of thinning, it is 15 μm or less, preferably 10 μm or less, more preferably 1 μm or less, and even more preferably 0.3 μm or less.

3. Substrate In this embodiment, the substrate may be a glass substrate, a metal foil, a resin substrate, or the like. Among them, the substrate is preferably transparent, and may be appropriately selected from conventionally known transparent substrates. Examples of the transparent substrate include glass substrates, acetylcellulose-based resins such as triacetylcellulose, polyester-based resins such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polylactic acid, olefin-based resins such as polypropylene, polyethylene, and polymethylpentene, acrylic resins, polyurethane-based resins, polyethersulfone, polycarbonate, polysulfone, polyether, polyether ketone, acrylonitrile, methacrylonitrile, cycloolefin polymer, and cycloolefin copolymer.

The transparent substrate preferably has a transmittance of 80% or more in the visible light region, and more preferably 90% or more. Here, the transmittance of the transparent substrate can be measured according to JIS K7361-1 (Test method for total light transmittance of plastic transparent materials).

In addition, when the retardation layer is formed by a roll-to-roll method, the transparent base material is preferably a flexible material having flexibility that allows it to be wound into a roll.
Examples of such flexible materials include cellulose derivatives, norbornene-based polymers, cycloolefin-based polymers, polymethyl methacrylate, polyvinyl alcohol, polyimide, polyarylate, polyethylene terephthalate, polysulfone, polyethersulfone, amorphous polyolefin, modified acrylic polymers, polystyrene, epoxy resins, polycarbonate, and polyesters. Among them, in this embodiment, it is preferable to use cellulose derivatives and polyethylene terephthalate. This is because cellulose derivatives are particularly excellent in optical isotropy and can be made to have excellent optical properties. In addition, polyethylene terephthalate is preferable because it has high transparency and excellent mechanical properties.

The thickness of the substrate used in this embodiment is not particularly limited as long as it is within a range that can impart the necessary self-supporting property depending on the application of the retardation film, but is usually within a range of about 10 μm or more and 1000 μm or less.
In particular, the thickness of the substrate is preferably in the range of 25 μm to 125 μm, and more preferably in the range of 30 μm to 100 μm. If the thickness is greater than the above range, for example, when a long retardation film is formed and then cut into a sheet of retardation film, processing waste may increase or the cutting blade may wear quickly.

The configuration of the base material used in this embodiment is not limited to a single layer, and may have a laminated configuration of multiple layers. When multiple layers are laminated, layers of the same composition may be laminated, or multiple layers of different compositions may be laminated.
For example, when the alignment film used in this embodiment contains an ultraviolet curable resin, a primer layer for improving the adhesion between the transparent substrate and the ultraviolet curable resin may be formed on the substrate. This primer layer may be any layer that has adhesion to both the substrate and the ultraviolet curable resin, is optically transparent in the visible light, and transmits ultraviolet light. For example, a vinyl chloride/vinyl acetate copolymer, a urethane-based layer, or the like may be appropriately selected and used.

An anchor coat layer may also be laminated on the substrate. The strength of the substrate can be improved by the anchor coat layer. Metal alkoxides, particularly metal silicon alkoxide sols, can be used as the anchor coat material. Metal alkoxides are usually used as alcohol-based solutions. The anchor coat layer needs to be a uniform and flexible film, so the thickness of the anchor coat layer is preferably about 0.04 μm or more and 2 μm or less, more preferably about 0.05 μm or more and 0.2 μm or less.
When the substrate has an anchor coat layer, the adhesion between the substrate and the anchor coat layer may be improved by further laminating a binder layer between the substrate and the anchor coat layer, or by making the anchor coat layer contain a material that strengthens the adhesion with the substrate. The binder material used to form the binder layer can be any material that can improve the adhesion between the substrate and the anchor coat layer without any particular limitation. Examples of the binder material include a silane coupling agent, a titanium coupling agent, and a zirconium coupling agent.

4. Method for Producing Retardation Film The method for producing a retardation film according to an embodiment of the present disclosure includes the steps of:
A step of forming a film from the polymerizable liquid crystal composition according to the embodiment of the present disclosure (film formation step);
a step of at least aligning the polymerizable liquid crystal compound in the polymerizable liquid crystal composition formed into a film (alignment step);
After the alignment step, a step of at least polymerizing the polymerizable liquid crystal compound (polymerization step) is performed to form a retardation layer.
As the polymerizable liquid crystal composition, the same one as in the above "A. Polymerizable liquid crystal composition" can be used, and therefore the description thereof will be omitted here.

(1) Film Forming Step of Polymerizable Liquid Crystal Composition The polymerizable liquid crystal composition is uniformly applied onto a support to form a film.
As described above, the coating amount of the polymerizable liquid crystal composition and the concentration of the polymerizable liquid crystal compound are appropriately adjusted to adjust the film thickness so as to give a desired retardation. The support here may be the substrate or the alignment film of the substrate provided with the alignment film.

The coating method may be selected as appropriate as long as it can form a film with the desired thickness with high accuracy. Examples include gravure coating, reverse coating, knife coating, dip coating, spray coating, air knife coating, spin coating, roll coating, printing, immersion and pulling, curtain coating, die coating, casting, bar coating, extrusion coating, and E-type coating.

(2) Orientation Step Next, the polymerizable liquid crystal compound in the polymerizable liquid crystal composition formed into a film is at least aligned. The film is heated at a temperature at which the polymerizable liquid crystal compound in the polymerizable liquid crystal composition can be aligned. This heat treatment allows the main chain portion of the polymerizable liquid crystal compound having an alignment property to be aligned and dried, and the polymerizable liquid crystal compound can be fixed while maintaining the aligned state.
The temperature at which alignment can be achieved varies depending on the substances in the polymerizable liquid crystal composition, and therefore needs to be appropriately adjusted. For example, the alignment is preferably performed within a range of 60° C. to 200° C., more preferably 60° C. to 100° C.
As the heating means, known heating and drying means can be appropriately selected and used.
The heating time may be appropriately selected, for example, within the range of 10 seconds to 2 hours, and preferably 20 seconds to 30 minutes.

(3) Polymerization step After the alignment step, the polymerizable liquid crystal compound is at least polymerized. In the alignment step, the coating film fixed while maintaining at least the alignment state of the polymerizable liquid crystal compound is irradiated with light, for example, to polymerize the polymerizable liquid crystal compound, and a retardation layer made of a cured product of the polymerizable liquid crystal composition can be obtained. When the morpholine compound contains a polymerizable functional group, it can react in the coating film fixed while maintaining the alignment state.
As the light irradiation, ultraviolet irradiation is preferably used. For the ultraviolet irradiation, ultraviolet rays emitted from light rays of an ultra-high pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, a metal halide lamp, etc. can be used. The irradiation amount of the energy ray source may be appropriately selected, and it is preferable that the cumulative exposure amount at an ultraviolet wavelength of 365 nm is, for example, within the range of 10 mJ/ ^cm2 to 10,000 mJ/ ^cm2 .

5. Uses The retardation film of the present disclosure is suitably used, for example, as an anti-reflection quarter-wave plate, and is suitably used as an optical member for various display devices as described below.

D. Transfer Laminate The transfer laminate of the present disclosure includes a retardation layer and a support that supports the retardation layer in a peelable manner,
The retardation layer is made of a cured product of the polymerizable liquid crystal composition of the present disclosure.
This is a transfer laminate to be used for transferring a retardation layer.

The transfer laminate of the present embodiment has a retardation layer made of the cured product of the polymerizable liquid crystal composition, and therefore has good alignment and heat resistance and excellent optical properties. According to the transfer laminate of the present embodiment, the retardation layer of the present disclosure, which is a thin film that does not include a substrate, can be transferred to any other optical member or the like.
According to the transfer laminate of the present embodiment, for example, a retardation film 10 consisting of only the retardation layer 1 as shown in the example of Fig. 2, or a retardation film consisting of a laminate 26 in which an alignment film 23 and a retardation layer 21 are laminated without including a substrate as shown in the example of Fig. 5 can be provided. That is, as long as the retardation layer is at least peelable, an alignment film or the like may be laminated on the retardation layer to be transferred from the transfer laminate.
The configuration of such a transfer laminate will be described below, but since the polymerizable liquid crystal composition according to the embodiment of the present disclosure is as described above, a description thereof will be omitted here.

The layer structure of the transfer laminate will be described with reference to the drawings. Figures 4 and 5 each show an embodiment of the transfer laminate of the present disclosure.
One embodiment of the transfer laminate 20 shown in the example of Figure 4 is a transfer laminate in which an alignment film 13 and a retardation layer 11 are laminated in this order on a second substrate 12 as a retardation layer 16 to be transferred and a support 15 that supports the retardation layer in a peelable manner. In the transfer laminate shown in the example of Figure 4, the peel strength between the second substrate 12 and the alignment film 13 is greater than the peel strength between the alignment film 13 and the retardation layer 11, so that the alignment film is peeled off at the interface 17 between the alignment film and the retardation layer, and the retardation layer 11 (16) can be transferred.
One embodiment of the transfer laminate 30 shown in the example of Figure 5 is a transfer laminate in which an alignment film 23 and a retardation layer 21 are laminated in this order on a second substrate 22 as a retardation layer 26 to be transferred and a support 25 that supports the retardation layer in a peelable manner. In the transfer laminate shown in the example of Figure 5, the peel strength between the second substrate 22 and the alignment film 23 is smaller than the peel strength between the alignment film 23 and the retardation layer 21, so that the second substrate 22 and the alignment film 23 are peeled off at the interface 27, and the retardation layer 26 to be transferred is an example of a transfer laminate to which the retardation layer 21 and the alignment film 23 can be transferred.

For example, whether the peel strength between the second substrate and the alignment film is greater or smaller than the peel strength between the alignment film and the retardation layer can be confirmed by peeling the retardation layer and checking at which interface peeling occurs. At which interface peeling occurs can be analyzed, for example, by IR or the like.

In addition, one embodiment of the transfer laminate 40 shown in the example of Figure 6 is a transfer laminate in which a retardation layer 36 to be transferred and a retardation layer 31 are laminated in this order on a second substrate 32 as a support 35 that supports the retardation layer in a peelable manner.

Hereinafter, this embodiment will be described, but the retardation layer may be the same as the retardation layer described in "C. Retardation film" above, so the description thereof will be omitted here.
The alignment film and the substrate may be the same as those described in "C. Retardation film". The peel strength may be adjusted by the following method.

In order to obtain the transfer laminate 20 shown in the example of FIG. 4, in order to make the peel strength between the second substrate 12 and the alignment film 13 greater than the peel strength between the alignment film 13 and the retardation layer 11, for example, a method can be used in which the solvent contained in the composition for forming the alignment film is capable of dissolving the second substrate. It is preferable to use a resin substrate as the second substrate, and the substrate surface may be subjected to a surface treatment to improve adhesion. In such a case, the adhesion between the resin substrate and the alignment film can be improved.
In addition, it is also preferable to make the solvent resistance of the alignment film relatively high in order to reduce the peel strength between the alignment film and the retardation layer so that the peel strength between the substrate and the alignment film is greater than the peel strength between the alignment film and the retardation layer. When the solvent resistance of the alignment film is relatively high, the alignment film is less likely to dissolve in the solvent in the polymerizable liquid crystal composition when the retardation layer is formed by applying the polymerizable liquid crystal composition onto the alignment film, so that the adhesion between the alignment film and the retardation layer can be reduced.

On the other hand, in order to obtain the transfer laminate 30 shown in the example of Fig. 5, in order to make the peel strength between the second substrate 22 and the alignment film 23 smaller than the peel strength between the alignment film 23 and the retardation layer 21, for example, a release treatment may be applied to the surface of the substrate, or a release layer may be formed. This can increase the releasability of the substrate, and the peel strength between the substrate and the alignment layer can be smaller than the peel strength between the alignment layer and the retardation layer.
The release treatment may be, for example, a surface treatment such as a fluorine treatment or a silicone treatment.
Examples of materials for the release layer include fluorine-based release agents, silicone-based release agents, wax-based release agents, etc. Examples of methods for forming the release layer include a method of applying a release agent by a coating method such as dip coating, spray coating, or roll coating.
Furthermore, in order to obtain the transfer laminate 40 shown in the example of Figure 6, if necessary, a release treatment may be applied to the surface of the substrate, or a release layer may be formed.

The substrate used in the transfer laminate may or may not have flexibility, but it is preferable for the substrate to have flexibility since this makes it easier to peel off.
The thickness of the substrate used in the transfer laminate is preferably within the range of 20 μm or more and 200 μm or less for sheets of the above materials, in order to balance sufficient self-supporting strength with flexibility that is adaptable to the manufacturing and transfer processes of the transfer laminate of this embodiment.

The retardation layer that can be provided from the transfer laminate of the present disclosure is suitable for use in the same applications as the retardation film, for example, as an anti-reflection quarter-wave plate, can be transferred to optical components for various display devices, and is suitable for use in providing thin-film optical components.

E. Optical Member The optical member of the present disclosure includes a polarizing plate on the retardation film of the present disclosure.

The optical member of this embodiment will be described with reference to the drawings. Fig. 7 is a schematic cross-sectional view showing one embodiment of the optical member.
In the example of the optical member 60 in Fig. 7, a polarizing plate 50 is disposed on the retardation film 10 of the present disclosure. An adhesive layer (bonding layer) may be provided between the retardation film 10 and the polarizing plate 50, if necessary (not shown).

In the present embodiment, the polarizing plate is a plate-like plate that transmits only light that vibrates in a specific direction, and can be appropriately selected from conventionally known polarizing plates. For example, a polyvinyl alcohol film, a polyvinyl formal film, a polyvinyl acetal film, an ethylene-vinyl acetate copolymer saponified film, or the like that is dyed with iodine or a dye and stretched can be used.
In addition, in this embodiment, the pressure-sensitive adhesive or adhesive for the adhesive layer (bonding layer) may be appropriately selected from conventionally known adhesives, and any adhesive form such as a pressure-sensitive adhesive (pressure-sensitive adhesive), a two-component curing adhesive, an ultraviolet-curing adhesive, a heat-curing adhesive, or a hot-melt adhesive may be suitably used.

The optical member of this embodiment may further include, in addition to the polarizing plate, other layers that are included in known optical members. Examples of such other layers include, but are not limited to, a retardation layer different from the retardation layer of this embodiment, an anti-reflection layer, a diffusion layer, an anti-glare layer, an antistatic layer, a protective film, and the like.

The optical member of this embodiment can be suitably used, for example, as an optical member that suppresses external light reflection, or as a wide-viewing angle polarizing plate for various display devices.

The manufacturing method of the optical member of the present disclosure is not particularly limited, and any method of laminating a polarizing plate on the retardation film of the present disclosure can be appropriately selected and used. For example, a manufacturing method of laminating a polarizing plate on the retardation film of the present disclosure via an adhesive layer or a bonding layer can be mentioned.

In addition, a method for producing an optical member according to an embodiment of the present disclosure includes the steps of:
A transfer laminate preparation step of preparing the transfer laminate of the present disclosure;
a transfer step of placing a transferee including at least a polarizing plate and the retardation layer of the transfer laminate opposite each other and transferring the transfer laminate onto the transferee;
and peeling the support from the transfer laminate transferred onto the transfer recipient.

According to the method for producing an optical member of one embodiment of the present disclosure using the transfer laminate, an optical member including a polarizing plate and only the retardation layer of the retardation film of the present disclosure can be obtained.
The transfer laminate used in the manufacturing method of the optical member of one embodiment of the present disclosure can be similar to that described above in "D. Transfer laminate," and therefore will not be described here.
Furthermore, the transferred object used in the manufacturing method of the optical member of one embodiment of the present disclosure typically includes, but is not limited to, an object having an adhesive layer and a polarizing plate, and may further have layers similar to other layers that may be included in the optical member of one embodiment of the present disclosure described above.

F. Display Device A display device according to the present disclosure is characterized by including the retardation film of the present embodiment or the optical member of the present embodiment.
Examples of the display device include, but are not limited to, a light-emitting display device and a liquid crystal display device.

In particular, since the retardation film or the optical member of the present embodiment is provided, the viewing angle is improved while suppressing external light reflection, particularly in a light-emitting display device such as an organic light-emitting display device having a transparent electrode layer, a light-emitting layer, and an electrode layer in this order.

An example of a light emitting display device according to an embodiment will be described with reference to the drawings. Fig. 8 is a schematic cross-sectional view showing an embodiment of an optical member.
In the example of the organic light-emitting display device 100 in FIG. 8, a polarizing plate 50 is disposed on the light output surface side of the retardation film 10, and the opposite surface has a transparent electrode layer 71, a light-emitting layer 72, and an electrode layer 73 in this order.
The light-emitting layer 72 may have a structure in which a hole injection layer, a hole transport layer, a light-emitting layer, and an electron injection layer are laminated in this order from the transparent electrode layer 71 side. In this embodiment, the transparent electrode layer, the hole injection layer, the hole transport layer, the light-emitting layer, the electron injection layer, the electrode layer, and other structures may be appropriately selected from known structures. The light-emitting display device thus manufactured may be applied to, for example, both passively driven organic EL displays and actively driven organic EL displays.
The display device of this embodiment is not limited to the above configuration, but may have any appropriately selected known configuration.

The chemical structure of each of the produced compounds was confirmed by ¹ H NMR measurement using a JEOL JNM-LA400WB manufactured by JEOL Ltd.
The phase transition temperatures of the produced liquid crystal compounds were confirmed by observing the texture with a polarizing microscope (Olympus, BX51) equipped with a temperature control stage during heating. C stands for crystal, N for nematic phase, Sm for smectic phase, and I for isotropic liquid. For example, "C 130 N 180 I" indicates that the phase transitioned from crystal to nematic phase at 130°C, and from nematic phase to isotropic liquid at 180°C.

[Synthesis Example 1: Synthesis of polymerizable liquid crystal compound (A-1)]
The polymerizable liquid crystal compound (A-1) shown below was synthesized in the same manner as in the compound 1 represented by formula (1-1) of Japanese Patent No. 6,473,537.
Phase transition temperature (when heating): C 130 N 180 I

[Synthesis Example 2: Synthesis of polymerizable liquid crystal compound (A-2)]
The polymerizable liquid crystal compound (A-2) shown below was synthesized in the same manner as in compound 3 represented by formula (1-3) in Japanese Patent No. 6,473,537.
Phase transition temperature (when heating): C 147 N 241 I

[Synthesis Example 3: Synthesis of polymerizable liquid crystal compound (A-3)]
With reference to the synthesis of compound 4 in Example 4 of Japanese Patent No. 5,962,760, the polymerizable liquid crystal compound (A-3) shown below was synthesized.
Phase transition temperature (when heating): C 96 N >250 I

[Synthesis Example 4: Synthesis of polymerizable liquid crystal compound (A-4)]
The polymerizable liquid crystal compound (A-4) shown below was synthesized in the same manner as in the compound (A11-1) of Example 5 of Japanese Patent No. 5,899,607.
Phase transition temperature (when heating): C 105 N >180 I

[Synthesis Example 5: Synthesis of polymerizable liquid crystal compound (A-5)]
The polymerizable liquid crystal compound (A-5) shown below was synthesized in the same manner as the compound (1-4) in Example 4 of Japanese Patent No. 6,363,566. The polymerizable liquid crystal compound (A-5) represents a mixture of positional isomers having different positions of the methyl group.
Phase transition temperature (when heated): C 109 Sm133 N 154 I

[Preparation of polymerizable liquid crystal compound (A-6)]
The following polymerizable liquid crystal compound (A-6) (LC-242, manufactured by BASF) was prepared.
Phase transition temperature (when heated): C65N118I

[Synthesis Example 6: Synthesis of Side Chain Liquid Crystal Polymer (A-7)]
A side chain liquid crystal polymer (A-7) was synthesized in the same manner as in Example 1 of WO 2018/003498 using the liquid crystal monomer shown below, non-liquid crystal monomer (a) and non-liquid crystal monomer (b) (non-liquid crystal monomer (a):non-liquid crystal monomer (b)=20:80 (molar ratio)).

[Synthesis Example 7: Synthesis of morpholine compound (B-1)]
Trimethylolpropane triacrylate (1.50 g, 5.06 mmol) and morpholine (1.32 g, 15.2 mmol) were dissolved in tetrahydrofuran (7.60 ml) and stirred at room temperature for 9 hours. After the reaction was completed, the solvent was distilled off and the residue was purified by silica gel chromatography to obtain 1.89 g (3.39 mmol, yield 67%) of morpholine compound (B-1) represented by formula (B-1).

¹ H NMR (CDCl ₃ ; δppm): 4.06 (s, 6H), 3.69-3.66 (m, 12H), 2.66 (t, 6H), 2.51 (t, 6H), 2.47-2.43 (m, 12H), 1.50 (q, 2H), 0.90 (t, 3H).

[Preparation of morpholine compound (B-2)]
A morpholine compound (B-2) represented by the following formula (B-2) (2-morpholinoethyl methacrylate, manufactured by Tokyo Chemical Industry Co., Ltd.) was prepared.

[Synthesis Example 8: Synthesis of morpholine compound (B-3)]
Pentaerythritol tetraacrylate (12.1 g, 34.4 mmol) was dissolved in methanol (10.0 ml) and stirred in an ice-water bath, and amylamine (1.00 g, 11.5 mmol) dissolved in methanol (5.00 ml) was slowly added. After stirring for 15 hours, the reaction solution was warmed to room temperature, and morpholine (18.0 g, 0.207 mol) dissolved in methanol (40.0 ml) was added dropwise, and the mixture was stirred at room temperature for 15 hours. After the reaction was completed, the solvent was distilled off and the residue was purified by silica gel chromatography to obtain 6.03 g (4.59 mmol, yield 40%) of morpholine compound (B-3) represented by formula (B-3).

^1H NMR (CDCl ₃ ; δppm): 4.07-4.05 (m, 16H), 3.76 (t, 4H), 3.69-3.66 (m, 24H), 3.01 (t , 2H), 2.66 (t, 12H), 2.52-2.42 (m, 40H), 1.37-1.27 (m, 6H), 0.90 (t, 3H).

[Synthesis Example 9: Synthesis of morpholine compound (B-4)]
Trimethylolpropane triacrylate (12.2 g, 41.3 mmol) was dissolved in methanol (7.0 ml) and stirred in an ice-water bath, and 1,6-diaminohexane (0.800 g, 6.89 mmol) dissolved in methanol (3.00 ml) was slowly added. After stirring for 15 hours, the reaction solution was warmed to room temperature, and morpholine (14.4 g, 0.165 mol) dissolved in methanol (25.0 ml) was added dropwise and stirred at room temperature for 15 hours. After the reaction was completed, the solvent was distilled off and the residue was purified by silica gel chromatography to obtain 4.95 g (2.48 mmol, yield 36%) of morpholine compound (B-4) represented by formula (B-4).

¹ H NMR (CDCl ₃ ; δppm): 4.08-4.04 (m, 24H), 3.76-3.68 (m, 40H), 3.01 (t, 4H), 2.66 (t , 16H), 2.52-2.43 (m, 56H), 1.50 (q, 8H), 1.38-1.27 (m, 8H), 0.90 (t, 12H).

[Synthesis Example 10: Synthesis of morpholine compound (B-5)]
9,9-Bis(4-hydroxyphenyl)fluorene (5.0 g, 14.3 mmol) and dimethylaniline (1.73 g, 14.3 mmol) were dissolved in chloroform (25.0 mL) and stirred for 30 minutes. After that, acryloyl chloride (6.46 g, 71.3 mmol) was added dropwise in an ice-water bath, and the mixture was stirred at room temperature for 4 hours. After the reaction was completed, the reaction solution was diluted with 100 ml of water, extracted with 100 ml of chloroform, and the solvent was distilled off. The obtained crude product was purified by a recrystallization method using a mixed solvent of chloroform and methanol. The obtained crystals were dried to obtain 1.64 g (3.57 mmol, 25% yield) of intermediate compound b5 represented by formula (b5).
Intermediate b5 (1.50 g, 3.27 mmol) was dissolved in methanol (1.5 ml), and morpholine (2.85 g, 32.7 mmol) dissolved in methanol (12.0 ml) was added dropwise and stirred at room temperature for 15 hours. After completion of the reaction, the solvent was distilled off and the residue was purified by silica gel chromatography to obtain 0.414 g (0.654 mmol, 20% yield) of morpholine compound (B-5) represented by formula (B-5).

¹ H NMR (CDCl ₃ ; δppm): 7.92-7.88 (m, 2H), 7.57-7.53 (m, 2H), 7.40-7.36 (m, 2H), 7 .30-7.26 (m, 2H), 7.19-7.16 (m, 8H), 3.69 (t, 8H), 2.66 (t, 4H), 2.51 (t, 4H) ), 2.45 (t, 8H).

[Synthesis Example 11: Synthesis of morpholine compound (B-6)]
2-Isocyanatoethyl methacrylate (5.0 g, 32.2 mmol) was dissolved in tetrahydrofuran (10.0 ml) and the temperature was raised to 40°C. 4-(2-hydroxyethyl)morpholine was slowly added thereto, and the mixture was stirred for 6 hours. After completion of the reaction, the solvent was distilled off and the resulting residue was purified by silica gel chromatography to obtain 1.11 g (3.87 mmol, 12% yield) of morpholine compound (B-6) represented by formula (B-6).

¹ H NMR (CDCl ₃ ; δppm): 6.76 (s, 1H), 6.49 (s, 1H), 6.41 (s, 1H), 4.58 (t, 2H), 3.69 ( t, 4H), 3.15 (t, 2H), 2.66 (t, 2H), 2.51 (t, 2H), 2.45 (t, 4H), 2.01 (t, 3H).

[Example 1]
(1) Production of Polymerizable Liquid Crystal Composition Polymerizable liquid crystal composition 1 was produced by dissolving 99 parts by mass of a polymerizable liquid crystal compound (compound (A-1)), 5 parts by mass of a morpholine compound (compound (B-1)), and 4 parts by mass of a photoinitiator (Irgacure 369, manufactured by Ciba Specialty Chemicals) in 900 parts by mass of cyclopentanone.

(2) Manufacture of retardation film or transfer laminate (2-1) Preparation of composition for photo-alignment film According to the description of Manufacture Example 1 of Japanese Patent No. 5626493, 1.30 g of hydroxyethyl methacrylate, 3.95 g of a photo-alignment monomer represented by the following chemical formula, and 50 mg of α,α'-azobisisobutyronitrile (AIBN) as a polymerization catalyst were dissolved in 25 ml of dioxane and reacted for 6 hours at 90° C. After completion of the reaction, the product was purified by a reprecipitation method to obtain a copolymer 1 in which the photo-alignment monomer represented by the following chemical formula and hydroxyethyl methacrylate were copolymerized.
A composition for a photo-alignment film having the composition shown below was prepared.
Copolymer 1: 0.1 parts by weight Hexamethoxymethylmelamine (HMM): 0.01 parts by weight p-Toluenesulfonic acid monohydrate (PTSA): 0.0015 parts by weight Propylene glycol monomethyl ether (PGME): 2.1 parts by weight

(2-2) Formation of horizontal alignment film The composition for photoalignment film was applied by bar coating onto one side of a PET substrate (Toyobo Co., Ltd., E5100, thickness 38 μm) so that the film thickness after curing would be 0.2 μm, and the composition was dried and thermally cured by heating in an oven at 120° C. for 1 minute to form a cured coating film. Thereafter, the surface of the cured coating film was irradiated with polarized ultraviolet light containing a 313 nm emission line using a Hg-Xe lamp and a Glan-Taylor prism in a direction perpendicular to the substrate normal at an exposure dose of 100 mJ/cm ² to form a horizontal alignment film.

(2-3) Preparation of Retardation Film or Laminate for Transfer The polymerizable liquid crystal composition 1 was applied onto the formed alignment film so that the film thickness after curing would be 1 μm, forming a film of the polymerizable liquid crystal composition. After that, the film was dried in an oven for 120 seconds at a temperature 10° C. higher than the solid-liquid crystal phase transition temperature of the polymerizable liquid crystal compound contained therein, and then irradiated with ultraviolet (UV) rays at an irradiation dose of 400 mJ/cm ² using an H bulb manufactured by Fusion, to form a retardation layer, thereby obtaining a retardation film or a laminate for transfer.

[Examples 2 to 14, Comparative Examples 1 to 4]
(1) Preparation of polymerizable liquid crystal composition Polymerizable liquid crystal compositions 2 to 14 and comparative polymerizable liquid crystal compositions 1 to 4 were obtained in the same manner as in Example 1, except that the composition of each component in Example 1 was changed according to Table 6 below.
(2) Production of Retardation Films and Laminates for Transfer [0133] Except for using polymerizable liquid crystal compositions 2 to 14 and comparative polymerizable liquid crystal compositions 1 to 4 instead of the polymerizable liquid crystal composition 1 in Example 1, retardation films and laminates for transfer 2 to 14 and comparative retardation films and laminates for transfer 1 to 4 were obtained in the same manner as in Example 1.
As comparative additives, the following compounds (C-1) and (C-2) were used.

[evaluation]
<Sample Creation>
The PET substrate of the retardation film obtained in each of the Examples and Comparative Examples was peeled off, and the retardation layer and the horizontal alignment film were transferred onto adhesive glass to prepare samples.

<Orientation>
The alignment of the retardation layer was evaluated on a four-level scale by observation with a polarizing microscope.
(Criteria for evaluating orientation)
A: Uniform orientation is observed visually, and 95% or more is oriented when observed under a polarizing microscope.
B: Uniform orientation is observed with the naked eye, and the oriented area under polarizing microscope observation is 90% or more and less than 95%. C: The orientation is not as good as that under A and B with the naked eye, and the oriented area under polarizing microscope observation is 50% or more and less than 90%. D: No orientation is observed with the naked eye, and the oriented area under polarizing microscope observation is also less than 50%.

<Heat resistance test>
The sample in which the retardation layer and the horizontal alignment film were transferred to the adhesive glass was heated in an oven at 100° C. for 1 hour.
(Phase difference fluctuation measurement)
The in-plane retardation Re at a wavelength of 550 nm was evaluated for its variation before and after the heat resistance test using a retardation measuring device (KOBRA-WR, manufactured by Oji Scientific Instruments Co., Ltd.).
(Evaluation Criteria for Phase Difference Fluctuation)
A: Fluctuation value less than 4.5 nm B: Fluctuation value 4.5 nm or more and less than 6 nm C: Fluctuation value 6 nm or more

[Example 15]
(1) Preparation of Polymerizable Liquid Crystal Composition Polymerizable liquid crystal composition 15 was prepared by dissolving 50 parts by mass of a polymerizable liquid crystal compound represented by the following formula (A-8), 50 parts by mass of the side chain type liquid crystal polymer (A-7) synthesized in Synthesis Example 6, 11.6 parts by mass of a morpholine compound (compound (B-1)), and 4 parts by mass of a photoinitiator (Irgacure 907, manufactured by Ciba Specialty Chemicals) in 400 parts by mass of cyclopentanone.

(2) Production of Retardation Film or Transfer Laminate A PET substrate having a thickness of 38 μm was used, and one side of the substrate was coated with a composition for a vertical alignment film (Finecure PXV-18 manufactured by Sanyo Chemical Industries, Ltd.) to a thickness of 3 μm, and the substrate was irradiated with polarized ultraviolet light of 20 mJ/cm to produce an alignment film.
Next, the polymerizable liquid crystal composition was applied onto the alignment film by a die head coating method, and then dried at a drying temperature of 85° C. for 60 seconds. After that, the composition was irradiated with ultraviolet (UV) rays to form a retardation layer, thereby obtaining a retardation film or a transfer laminate.

[Comparative Example 5]
(1) Production of Polymerizable Liquid Crystal Composition Comparative polymerizable liquid crystal composition 5 was obtained in the same manner as in Example 15, except that the morpholine compound (compound (B-1)) in Example 15 was not used.
(2) Production of Retardation Film and Transfer Laminate A comparative retardation film and transfer laminate 5 were obtained in the same manner as in Example 15, except that the comparative polymerizable liquid crystal composition 5 was used instead of the polymerizable liquid crystal composition 15 in Example 15.

[evaluation]
<Sample Creation>
The PET substrate was peeled off from the retardation films obtained in Example 15 and Comparative Example 5, and the retardation layer and the alignment film were transferred onto adhesive glass to prepare samples.

<Orientation>
The alignment of the retardation layer was evaluated on a three-level scale by observing the in-plane uniformity described below with a polarizing microscope.
(In-plane uniformity)
The retardation value Rth of the sample obtained above was measured for light with a wavelength of 550 nm using KOBRA-WR manufactured by Oji Scientific Instruments Co., Ltd. A 10 cm square area was set on the surface of the optical film, and measurements were taken at 10 points within the area. The in-plane uniformity was evaluated based on the difference (ΔRth) between the maximum and minimum retardation values obtained.
(Evaluation criteria for in-plane uniformity)
A: ΔRth was 2 nm or less.
B: ΔRth was more than 2 nm and 3 nm or less.
C: ΔRth exceeded 3 nm.

<Heat resistance test>
The sample in which the retardation layer and the horizontal alignment film were transferred to the adhesive glass was heated in an oven at 100° C. for 1 hour.
(Phase difference fluctuation measurement)
The in-plane retardation Rth at a wavelength of 550 nm was evaluated for its variation before and after the heat resistance test using a retardation measuring device (KOBRA-WR, manufactured by Oji Scientific Instruments Co., Ltd.).
(Evaluation Criteria for Phase Difference Fluctuation)
A: Fluctuation value less than 10 nm B: Fluctuation value 10 nm or more and less than 15 nm C: Fluctuation value 15 nm or more

[Summary of results]
As shown in Comparative Examples 1 and 5, when the morpholine compound was not added, the retardation before and after the heat resistance test varied, indicating that the heat resistance was insufficient.
As in Comparative Example 2, even when a relatively small amount of the additive (compound (C-1)) of the prior art was added, the retardation before and after the heat resistance test changed, indicating that the heat resistance was insufficient.
On the other hand, when the content of the additive (compound (C-1)) of the conventional technology was increased to improve the heat resistance as in Comparative Example 3, the alignment property of the polymer (cured product) of the polymerizable liquid crystal composition was decreased, and the retardation fluctuation could not be evaluated.
Furthermore, even when a morpholine compound not containing the bond specified in the present invention (compound (C-2)) was added, the phase difference changed before and after the heat resistance test, indicating that the heat resistance was insufficient.
In contrast, in Examples 1 to 15, it was shown that when the morpholine compound of the present disclosure was added to a polymerizable liquid crystal compound, a polymerizable liquid crystal composition having improved heat resistance while suppressing the decrease in alignment property could be obtained, and the decrease in retardation value before and after the heat resistance test could be suppressed.

1 Retardation layer 2, 2' Substrate 3 Alignment film 10 Retardation film 11, 21, 31 Retardation layer 12, 22, 32 Second substrate 13, 23, 33 Alignment film 15, 25, 35 Peelable support 16, 26, 36 Retardation layer 17 to be transferred Interface between alignment film and retardation layer 27 Interface between second substrate and alignment film 20, 30, 40 Laminate for transfer 50 Polarizing plate 60 Optical member 71 Transparent electrode layer 72 Light-emitting layer 73 Electrode layer 100 Light-emitting display device

Claims (12)

The liquid crystal composition according to the present invention comprises a polymerizable liquid crystal compound and a morpholine compound having at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate bond, a phosphate bond, and an amide bond ,
The polymerizable liquid crystal composition , wherein the morpholine compound is at least one selected from the group consisting of compounds represented by the following general formula (B) and the following general formula (B') :

(In general formulae (B) and (B'), R ^a is an aliphatic hydrocarbon group which may contain a heteroatom in the carbon chain and has at least one substituent selected from the group consisting of a halogen atom, an amino group which may be substituted with an alkyl group, a nitro group, a cyano group, an isocyano group, a hydroxy group, a mercapto group, and a polymerizable functional group, and represents a monovalent group which contains at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate ester bond, a phosphate ester bond, and an amide bond; Q is an n-valent group which may contain at least one substituent selected from the group consisting of a halogen atom, an amino group which may be substituted with an alkyl group, a nitro group, a cyano group, an isocyano group, a hydroxy group, a mercapto group, and a polymerizable functional group, and may contain a heteroatom in the carbon chain and contains at least one bond selected from the group consisting of an ester bond, a thioester bond, a carbonate ester bond, a phosphate ester bond, and an amide bond, and n morpholine rings in the parentheses are connected; n is an integer of 2 or more.) The polymerizable liquid crystal composition according to claim 1, containing the morpholine compound in an amount of 1 part by mass or more and 25 parts by mass or less relative to 100 parts by mass of the total amount of the polymerizable liquid crystal compound and the morpholine compound. The polymerizable liquid crystal composition according to claim 1 or 2, wherein the morpholine compound contains at least one of a partial structure represented by the following (b-1) or a partial structure represented by the following (b-2):

(In the formula, * indicates the bonding position of the partial structure.) The polymerizable liquid crystal composition according to any one of claims 1 to 3, wherein the morpholine compound comprises at least one selected from the group consisting of the following (i) and (iv):
(i) Hydrogen-bonding group
(iv) Three or more morpholine rings in one molecule The polymerizable liquid crystal composition according to any one of claims 1 to 3, wherein the morpholine compound includes at least one selected from the group consisting of compounds represented by the following (B-1) to (B-6):

A polymer obtained by polymerizing the polymerizable liquid crystal composition according to any one of claims 1 to 5 . A retardation film having a retardation layer, the retardation layer comprising a cured product of the polymerizable liquid crystal composition according to any one of claims 1 to 5 . A step of forming a film from the polymerizable liquid crystal composition according to any one of claims 1 to 5 ;
a step of at least aligning the polymerizable liquid crystal compound in the formed film of the polymerizable liquid crystal composition;
A method for producing a retardation film, comprising a step of forming a retardation layer by at least polymerizing the polymerizable liquid crystal compound after the alignment step. A retardation layer and a support supporting the retardation layer in a peelable manner,
The retardation layer contains a cured product of the polymerizable liquid crystal composition according to any one of claims 1 to 5 .
A transfer laminate used for transferring a retardation layer. An optical member comprising a polarizing plate on the retardation film according to claim 7 . A step of preparing a transfer laminate to be used for transferring a retardation layer, the transfer laminate comprising a retardation layer and a support supporting the retardation layer in a peelable manner, the retardation layer containing a cured product of the polymerizable liquid crystal composition according to any one of claims 1 to 5 ;
a transfer step of placing a transferee including at least a polarizing plate and the retardation layer of the transfer laminate opposite each other and transferring the transfer laminate onto the transferee;
a peeling step of peeling the support from the transfer laminate transferred onto the transfer recipient;
The method for producing an optical member comprising the steps of: A display device comprising the retardation film according to claim 7 or an optical member comprising a polarizing plate on the retardation film.

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