JPWO2015012341A1 - Polymer, polymer composition, and liquid crystal alignment film for lateral electric field drive type liquid crystal display device - Google Patents

Abstract

The present invention provides a lateral electric field drive type liquid crystal display element that is imparted with high efficiency and orientation control ability and is excellent in image sticking characteristics. The present invention is a photosensitive side chain polymer that exhibits liquid crystallinity in a predetermined temperature range, and is represented by the following formula (0) [wherein G represents the following formula (G-1), (G- 2), (G-3) and (G-4) (wherein the broken line represents a bond, R50 represents a group selected from a hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, and a phenyl group). A plurality of R50s may be the same or different from each other, J represents O, S, NH or NR51, and R51 represents a group selected from an alkyl group having 1 to 3 carbon atoms and a phenyl group). This problem is solved by a side chain polymer further having a side chain represented by [Chemical 1] [Selection] Figure 1

Description

  The present invention relates to a novel polymer, a composition containing the polymer, a liquid crystal alignment film for a lateral electric field drive type liquid crystal display device using the polymer, and a method for producing a substrate having the alignment film. Furthermore, the present invention relates to a novel method for producing a liquid crystal display device having excellent image sticking characteristics.

  The liquid crystal display element is known as a light, thin and low power consumption display device, and has been remarkably developed in recent years. The liquid crystal display element is configured, for example, by sandwiching a liquid crystal layer between a pair of transparent substrates provided with electrodes. In the liquid crystal display element, an organic film made of an organic material is used as the liquid crystal alignment film so that the liquid crystal is in a desired alignment state between the substrates.

  That is, the liquid crystal alignment film is a constituent member of the liquid crystal display element, and is formed on a surface of the substrate that holds the liquid crystal in contact with the liquid crystal, and plays a role of aligning the liquid crystal in a certain direction between the substrates. The liquid crystal alignment film may be required to play a role of controlling the pretilt angle of the liquid crystal in addition to the role of aligning the liquid crystal in a certain direction such as a direction parallel to the substrate. In such a liquid crystal alignment film, the ability to control the alignment of liquid crystal (hereinafter referred to as alignment control ability) is given by performing an alignment treatment on the organic film constituting the liquid crystal alignment film.

  A rubbing method is conventionally known as an alignment treatment method for a liquid crystal alignment film for imparting alignment control ability. The rubbing method is a method of rubbing (rubbing) the surface of an organic film such as polyvinyl alcohol, polyamide or polyimide on a substrate with a cloth such as cotton, nylon or polyester in the rubbing direction (rubbing direction). This is a method of aligning liquid crystals. Since this rubbing method can easily realize a relatively stable alignment state of liquid crystals, it has been used in the manufacturing process of conventional liquid crystal display elements. As an organic film used for the liquid crystal alignment film, a polyimide-based organic film excellent in reliability such as heat resistance and electrical characteristics has been mainly selected.

  However, in the rubbing method of rubbing the surface of the liquid crystal alignment film made of polyimide or the like, generation of dust or static electricity may be a problem. In addition, due to the high definition of the liquid crystal surface element in recent years and the unevenness caused by the corresponding electrodes on the substrate and the switching active element for driving the liquid crystal, the surface of the liquid crystal alignment film cannot be uniformly rubbed with a cloth. In some cases, alignment of the liquid crystal could not be realized.

  Therefore, a photo-alignment method has been actively studied as another alignment treatment method for a liquid crystal alignment film that is not rubbed.

  There are various photo alignment methods. Anisotropy is formed in the organic film constituting the liquid crystal alignment film by linearly polarized light or collimated light, and the liquid crystal is aligned according to the anisotropy.

  A decomposition type photo-alignment method is known as a main photo-alignment method. For example, the polyimide film is irradiated with polarized ultraviolet rays, and anisotropic decomposition is caused by utilizing the polarization direction dependence of the ultraviolet absorption of the molecular structure. Then, the liquid crystal is aligned by the polyimide remaining without being decomposed (see, for example, Patent Document 1).

  In addition, photocrosslinking type and photoisomerization type photo-alignment methods are also known. For example, polyvinyl cinnamate is used and irradiated with polarized ultraviolet rays to cause a dimerization reaction (crosslinking reaction) at the double bond portion of two side chains parallel to the polarized light. Then, the liquid crystal is aligned in a direction perpendicular to the polarization direction (see, for example, Non-Patent Document 1). In addition, when a side chain polymer having azobenzene in the side chain is used, irradiation with polarized ultraviolet light causes an isomerization reaction at the azobenzene portion of the side chain parallel to the polarized light, and the liquid crystal is aligned in a direction perpendicular to the polarization direction. Align (for example, see Non-Patent Document 2).

  As in the above example, the liquid crystal alignment film alignment treatment method by the photo alignment method eliminates the need for rubbing, and there is no fear of generation of dust or static electricity. An alignment process can be performed even on a substrate of a liquid crystal display element having an uneven surface, which is a method for aligning a liquid crystal alignment film suitable for an industrial production process.

Japanese Patent No. 3893659

M. Shadt et al., Jpn. J. Appl. Phys. 31, 2155 (1992) K. Ichimura et al., Chem. Rev. 100, 1847 (2000)

  As described above, the photo-alignment method does not require a rubbing process as compared with a rubbing method that has been industrially used as an alignment treatment method for liquid crystal display elements, and thus has a great advantage. And compared with the rubbing method in which the alignment control ability becomes almost constant by rubbing, the photo alignment method can control the alignment control ability by changing the irradiation amount of polarized light. However, in the photo-alignment method, in order to achieve the same degree of alignment control ability as in the rubbing method, a large amount of polarized light irradiation may be required or stable liquid crystal alignment may not be realized. .

  For example, in the decomposition type photo-alignment method described in Patent Document 1, it is necessary to irradiate the polyimide film with ultraviolet light from a high-pressure mercury lamp with an output of 500 W for 60 minutes. Become. Even in the case of a dimerization type or photoisomerization type photo-alignment method, a large amount of ultraviolet irradiation of about several J (joule) to several tens of J may be required. Furthermore, in the case of the photo-crosslinking type or photoisomerization type photo-alignment method, since the thermal stability and light stability of the liquid crystal alignment are inferior, there is a problem that alignment failure or display burn-in occurs when a liquid crystal display element is used. was there. In particular, in a horizontal electric field drive type liquid crystal display element, since liquid crystal molecules are switched in a plane, alignment misalignment of liquid crystal after liquid crystal driving is likely to occur, and display burn-in caused by AC driving is a major issue.

  Therefore, in the photo-alignment method, there is a demand for higher efficiency of alignment treatment and realization of stable liquid crystal alignment, and liquid crystal alignment films and liquid crystals that can impart high alignment control ability to the liquid crystal alignment film with high efficiency. There is a need for aligning agents.

The present invention provides a substrate having a liquid crystal alignment film for a horizontal electric field drive type liquid crystal display element which is provided with high efficiency and orientation control ability and has excellent image sticking characteristics, and a horizontal electric field drive type liquid crystal display element having the substrate. With the goal.
In addition to the above object, an object of the present invention is to provide a lateral electric field drive type liquid crystal element having an improved voltage holding ratio and a liquid crystal alignment film for the element.

As a result of intensive studies to achieve the above problems, the present inventors have found the following invention.
<1> A photosensitive side-chain polymer that exhibits liquid crystallinity within a predetermined temperature range, which is represented by the following formula (0):

[Wherein, A and B are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O. -Represents-or -O-CO-CH = CH-;
S is an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced by a halogen group;
T is a single bond or an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced with a halogen group;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
P and Q are each independently selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. Provided that when X is —CH═CH—CO—O— or —O—CO—CH═CH—, P or Q on the side to which —CH═CH— is bonded is an aromatic ring; When the number of P is 2 or more, the Ps may be the same or different, and when the number of Q is 2 or more, the Qs may be the same or different;
l1 is 0 or 1;
l2 is an integer from 0 to 2;
when l1 and l2 are both 0, A represents a single bond when T is a single bond;
when l1 is 1, B represents a single bond when T is a single bond;
G represents the following formulas (G-1), (G-2), (G-3) and (G-4).

(Wherein the dashed line represents a bond, R ⁵⁰ represents a group selected from hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, a phenyl group, if R ⁵⁰ is more mutually the same or different T is an integer of 1 to 7, J represents O, S, NH or NR ⁵¹ , and R ⁵¹ represents a group selected from an alkyl group having 1 to 3 carbon atoms and a phenyl group)
Is a group selected from
A side chain polymer further having a side chain represented by the formula:

  <2> In the above item <1>, the side chain polymer preferably has a photosensitive side chain that causes photocrosslinking, photoisomerization, or photofleece transition.

  <3> In the above item <1> or <2>, the side chain polymer may have any one photosensitive side chain selected from the group consisting of the following formulas (1) to (6).

In the formula, A, B, and D are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—. Represents O— or —O—CO—CH═CH—;
S is an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced by a halogen group;
T is a single bond or an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced with a halogen group;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
Y ₂ is a group selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof, The hydrogen atoms bonded to each independently represent —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or 1 to 5 carbon atoms. May be substituted with an alkyloxy group of
R represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, or the same definition as Y ₁ ;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
Cou represents coumarin-6-yl group or a coumarin-7-yl group, _-NO 2 are each a hydrogen atom bonded to them _{independently, -CN, -CH = C (CN} ) 2, -CH = CH- May be substituted with CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms;
one of q1 and q2 is 1 and the other is 0;
q3 is 0 or 1;
P and Q are each independently selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. Provided that when X is —CH═CH—CO—O— or —O—CO—CH═CH—, P or Q on the side to which —CH═CH— is bonded is an aromatic ring; When the number of P is 2 or more, the Ps may be the same or different, and when the number of Q is 2 or more, the Qs may be the same or different;
l1 is 0 or 1;
l2 is an integer from 0 to 2;
when l1 and l2 are both 0, A represents a single bond when T is a single bond;
when l1 is 1, B represents a single bond when T is a single bond;
H and I are each independently a group selected from a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, and combinations thereof.

<4> In the above item <1> or <2>, the side chain polymer may have any one photosensitive side chain selected from the group consisting of the following formulas (7) to (10).
In which A, B, D, Y ₁ , X, Y ₂ and R have the same definition as above;
l represents an integer of 1 to 12;
m represents an integer of 0 to 2, and m1 and m2 represent an integer of 1 to 3;
n represents an integer of 0 to 12 (however, when n = 0, B is a single bond).

<5> In the above item <1> or <2>, the side chain polymer may have any one photosensitive side chain selected from the group consisting of the following formulas (11) to (13).
In the formula, A, X, l, m, m1 and R have the same definition as above.

<6> In the above item <1> or <2>, the side chain polymer preferably has a photosensitive side chain represented by the following formula (14) or (15).
In the formula, A, Y ₁ , l, m1 and m2 have the same definition as above.

<7> In the above item <1> or <2>, the side chain polymer may have a photosensitive side chain represented by the following formula (16) or (17).
In the formula, A, X, l and m have the same definition as above.

<8> In the above item <1> or <2>, the side chain polymer may have a photosensitive side chain represented by the following formula (18) or (19).
In the formula, A, B, Y ₁ , q1, q2, m1, and m2 have the same definition as above.
R ₁ is a hydrogen atom, —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. Represents an oxy group.

<9> In the above item <1> or <2>, the side chain polymer preferably has a photosensitive side chain represented by the following formula (20).
In the formula, A, Y ₁ , X, l and m have the same definition as above.

<10> In any one of the above items <1> to <9>, the side chain polymer has any one liquid crystalline side chain selected from the group consisting of the following formulas (21) to (31). Is good.
In which A and B have the same definition as above;
Y ₃ is a group selected from the group consisting of a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, nitrogen-containing heterocycle, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. And each hydrogen atom bonded thereto may be independently substituted with —NO ₂ , —CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms;
R ₃ is a hydrogen atom, —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, halogen group, monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, nitrogen-containing A heterocyclic ring, an alicyclic hydrocarbon having 5 to 8 carbon atoms, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms;
one of q1 and q2 is 1 and the other is 0;
l represents an integer of 1 to 12, m represents an integer of 0 to 2, provided that in formulas (23) to (24), the sum of all m is 2 or more, and formulas (25) to (26 ), The sum of all m is 1 or more, and m1, m2 and m3 each independently represents an integer of 1 to 3;
R ₂ is a hydrogen atom, —NO ₂ , —CN, a halogen group, a monovalent benzene ring, a naphthalene ring, a biphenyl ring, a furan ring, a nitrogen-containing heterocyclic ring, and an alicyclic hydrocarbon having 5 to 8 carbon atoms, And represents an alkyl group or an alkyloxy group;
Z ₁ and Z _{2 each} represents a single bond, —CO—, —CH ₂ O—, —CH═N—, or —CF ₂ —.

  <11> (A) A polymer composition comprising the side chain polymer according to any one of <1> to <10>, and (B) an organic solvent.

  <12> In the above item <11>, the polymer composition further has (C) one primary amino group and a nitrogen-containing aromatic heterocyclic ring in the molecule, and the primary amino group is aliphatic carbonized. It is preferable to contain an amine compound bonded to a hydrogen group or a non-aromatic cyclic hydrocarbon group.

<13> In the above <12>, the component (C) is represented by the following formula A- [1] (wherein Y ₁₁ is a divalent organic group having an aliphatic hydrocarbon group or a non-aromatic cyclic hydrocarbon group. And Y ₁₂ is a nitrogen-containing aromatic heterocyclic ring).

<14> A step of applying a composition according to any one of the above <11> to <13> onto a substrate having a conductive film for driving a lateral electric field to form a coating film;
[II] a step of irradiating the coating film obtained in [I] with polarized ultraviolet rays; and [III] a step of heating the coating film obtained in [II];
The manufacturing method of the board | substrate which has the said liquid crystal aligning film which obtains the liquid crystal aligning film for horizontal electric field drive type liquid crystal display elements by which orientation control ability was provided by having.

<15> A substrate having a liquid crystal alignment film for a lateral electric field drive type liquid crystal display device produced by the method of <14>.
<16> A lateral electric field drive type liquid crystal display device having the substrate of <15> above.

<17> a step of preparing a substrate (first substrate) of <15>above;
[I ′] A step of applying a polymer composition according to any one of <11> to <13> above to form a coating film on a second substrate;
[II ′] a step of irradiating the coating film obtained in [I ′] with polarized ultraviolet rays; and [III ′] a step of heating the coating film obtained in [II ′];
Obtaining a liquid crystal alignment film imparted with alignment control ability by having a second substrate having the liquid crystal alignment film; and [IV] liquid crystal alignment films of the first and second substrates via liquid crystal The liquid crystal display element is obtained by disposing the first and second substrates so as to face each other;
A method for producing a liquid crystal display element, comprising obtaining a lateral electric field drive type liquid crystal display element.

  <18> A lateral electric field drive type liquid crystal display device manufactured according to the above <17>.

According to the present invention, there are provided a substrate having a liquid crystal alignment film for a horizontal electric field drive type liquid crystal display element which is provided with high efficiency and orientation control ability and has excellent image sticking characteristics, and a horizontal electric field drive type liquid crystal display element having the substrate. Can do.
Since the lateral electric field drive type liquid crystal display device manufactured by the method of the present invention is provided with the alignment control ability with high efficiency, the display characteristics are not impaired even when continuously driven for a long time.
Further, according to the present invention, in addition to the above effect, a lateral electric field drive type liquid crystal element having an improved voltage holding ratio by adsorbing ionic impurities in the liquid crystal at the liquid crystal alignment film interface and a liquid crystal alignment film for the element are provided. Can be provided.

It is a figure of one example which illustrates typically the introduction process of the anisotropy in the manufacturing method of the liquid crystal aligning film used for this invention, using the crosslinkable organic group for the photosensitive side chain, and introduced the anisotropic It is a figure when property is small. It is a figure of one example which illustrates typically the introduction process of the anisotropy in the manufacturing method of the liquid crystal aligning film used for this invention, using the crosslinkable organic group for the photosensitive side chain, and introduced the anisotropic It is a figure when the property is large. It is a figure of one example which illustrates typically the introduction processing of anisotropy in the manufacturing method of the liquid crystal aligning film used for the present invention, using the organic group which causes fleece transition or isomerization to the photosensitive side chain, and is introduced. It is a figure in case the anisotropy made is small. It is a figure of one example which illustrates typically the introduction processing of anisotropy in the manufacturing method of the liquid crystal aligning film used for the present invention, using the organic group which causes fleece transition or isomerization to the photosensitive side chain, and is introduced. It is a figure in case the anisotropy made is large.

As a result of intensive studies, the inventor has obtained the following knowledge and completed the present invention.
The polymer composition used in the production method of the present invention has a photosensitive side chain polymer that can exhibit liquid crystallinity (hereinafter, also simply referred to as a side chain polymer), and the polymer composition The coating film obtained by using the product is a film having a photosensitive side chain polymer that can exhibit liquid crystallinity. This coating film is subjected to orientation treatment by irradiation with polarized light without being rubbed. And after polarized light irradiation, it will become the coating film (henceforth a liquid crystal aligning film) to which the orientation control ability was provided through the process of heating the side chain type polymer film. At this time, the slight anisotropy developed by the irradiation of polarized light becomes a driving force, and the liquid crystalline side chain polymer itself is efficiently reoriented by self-organization. As a result, a highly efficient alignment process can be realized as a liquid crystal alignment film, and a liquid crystal alignment film with high alignment control ability can be obtained.

Hereinafter, embodiments of the present invention will be described in detail.
<Manufacturing method of substrate having liquid crystal alignment film> and <Manufacturing method of liquid crystal display element>
The method for producing a substrate having the liquid crystal alignment film of the present invention is as follows.
[I] (A) A photosensitive side chain polymer that exhibits liquid crystallinity in a predetermined temperature range, and further having a side chain represented by the above formula (0), and B) The process of apply | coating the polymer composition containing an organic solvent on the board | substrate which has a conductive film for a horizontal electric field drive, and forming a coating film;
[II] a step of irradiating the coating film obtained in [I] with polarized ultraviolet rays; and [III] a step of heating the coating film obtained in [II];
Have
Through the above steps, a liquid crystal alignment film for a lateral electric field drive type liquid crystal display element to which alignment control ability is imparted can be obtained, and a substrate having the liquid crystal alignment film can be obtained.

Further, by preparing a second substrate in addition to the obtained substrate (first substrate), a lateral electric field drive type liquid crystal display element can be obtained.
The second substrate is replaced with a substrate having no lateral electric field driving conductive film instead of a substrate having no lateral electric field driving conductive film, except that the above steps [I] to [III] (lateral electric field driving For the sake of convenience, the substrate having no conductive film is sometimes referred to as processes [I ′] to [III ′] in some cases for the sake of convenience. Two substrates can be obtained.

The manufacturing method of the horizontal electric field drive type liquid crystal display element is:
[IV] A step of obtaining a liquid crystal display element by arranging the first and second substrates obtained above so that the liquid crystal alignment films of the first and second substrates face each other with liquid crystal interposed therebetween;
Have Thereby, a horizontal electric field drive type liquid crystal display element can be obtained.

Hereinafter, each process of [I]-[III] and [IV] which the manufacturing method of this invention has is demonstrated.
<Process [I]>
Step [I] is a photosensitive side-chain polymer that exhibits liquid crystallinity in a predetermined temperature range on a substrate having a conductive film for driving a lateral electric field, and is represented by the above formula (0). A side chain polymer further having a side chain, an organic solvent, and optionally, one primary amino group and a nitrogen-containing aromatic heterocyclic ring in the molecule, and the primary amino group is aliphatic carbonized A polymer composition containing an amine compound bonded to a hydrogen group or a non-aromatic cyclic hydrocarbon group is applied to form a coating film.

<Board>
Although it does not specifically limit about a board | substrate, When the liquid crystal display element manufactured is a transmission type, it is preferable that a highly transparent board | substrate is used. In that case, there is no particular limitation, and a glass substrate or a plastic substrate such as an acrylic substrate or a polycarbonate substrate can be used.
In consideration of application to a reflective liquid crystal display element, an opaque substrate such as a silicon wafer can also be used.

<Conductive film for driving lateral electric field>
The substrate has a conductive film for driving a lateral electric field.
Examples of the conductive film include, but are not limited to, ITO (Indium Tin Oxide) and IZO (Indium Zinc Oxide) when the liquid crystal display element is a transmission type.
In the case of a reflective liquid crystal display element, examples of the conductive film include a material that reflects light such as aluminum, but are not limited thereto.
As a method for forming a conductive film on a substrate, a conventionally known method can be used.

<Polymer composition>
A polymer composition is applied on a substrate having a conductive film for driving a lateral electric field, particularly on the conductive film.
The polymer composition used in the production method of the present invention comprises: (A) a photosensitive side chain polymer that exhibits liquid crystallinity in a predetermined temperature range; (B) an organic solvent; and, if desired, (C) a molecule having one primary amino group and a nitrogen-containing aromatic heterocyclic ring, and the primary amino group is bonded to an aliphatic hydrocarbon group or a non-aromatic cyclic hydrocarbon group; Containing amine compounds.

<< (A) Side chain polymer >>
The component (A) is a photosensitive side chain polymer that exhibits liquid crystallinity in a predetermined temperature range, and further has a side chain represented by the above formula (0).
(A) The side chain polymer preferably reacts with light in the wavelength range of 250 nm to 400 nm and exhibits liquid crystallinity in the temperature range of 100 ° C to 300 ° C.
The (A) side chain polymer preferably has a photosensitive side chain that reacts with light in the wavelength range of 250 nm to 400 nm.
The (A) side chain polymer preferably has a mesogenic group in order to exhibit liquid crystallinity in the temperature range of 100 ° C to 300 ° C.

  (A) The side chain type polymer has a photosensitive side chain bonded to the main chain, and can react with light to cause a crosslinking reaction, an isomerization reaction, or a light fleece rearrangement. The structure of the side chain having photosensitivity is not particularly limited, but a structure that undergoes a crosslinking reaction or photofleece rearrangement in response to light is desirable, and a structure that causes a crosslinking reaction is more desirable. In this case, even if exposed to external stress such as heat, the achieved orientation control ability can be stably maintained for a long period of time. The structure of the photosensitive side chain polymer film capable of exhibiting liquid crystallinity is not particularly limited as long as it satisfies such characteristics, but it is preferable to have a rigid mesogenic component in the side chain structure. In this case, stable liquid crystal alignment can be obtained when the side chain polymer is used as a liquid crystal alignment film.

  (A) The side chain type polymer has a group represented by the above formula (0), thereby giving a highly reliable liquid crystal alignment film such as a voltage holding ratio (VHR). This is because when the liquid crystal alignment film is used, the group represented by the above formula (0) acts like a crosslinking agent, so that the film density is improved and elution of ionic impurities into the liquid crystal is reduced. This is probably because of this.

  The polymer structure has, for example, a main chain and a side chain bonded to the main chain, and the side chain includes a mesogenic component such as a biphenyl group, a terphenyl group, a phenylcyclohexyl group, a phenylbenzoate group, and an azobenzene group, and a tip. A structure having a photosensitive group bonded to a moiety, which undergoes a crosslinking reaction or an isomerization reaction in response to light, or a main chain and a side chain bonded to the main chain, and the side chain also serves as a mesogenic component, and A structure having a phenylbenzoate group that undergoes a photo-Fries rearrangement reaction can be obtained.

  More specific examples of the structure of the photosensitive side chain polymer film that can exhibit liquid crystallinity include hydrocarbon, (meth) acrylate, itaconate, fumarate, maleate, α-methylene-γ-butyrolactone, styrene, A main chain composed of at least one selected from the group consisting of radically polymerizable groups such as vinyl, maleimide, norbornene and siloxane, a group represented by the above formula (0), and the following formula (1) ( The structure having a side chain comprising at least one kind of 6) is preferred.

In the formula, A, B, and D are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—. Represents O— or —O—CO—CH═CH—;
S is an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced by a halogen group;
T is a single bond or an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced with a halogen group;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
Y ₂ is a group selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof, The hydrogen atoms bonded to each independently represent —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or 1 to 5 carbon atoms. May be substituted with an alkyloxy group of
R represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, or the same definition as Y ₁ ;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
Cou represents coumarin-6-yl group or a coumarin-7-yl group, _-NO 2 are each a hydrogen atom bonded to them _{independently, -CN, -CH = C (CN} ) 2, -CH = CH- May be substituted with CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms;
one of q1 and q2 is 1 and the other is 0;
q3 is 0 or 1;
P and Q are each independently selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. Provided that when X is —CH═CH—CO—O— or —O—CO—CH═CH—, P or Q on the side to which —CH═CH— is bonded is an aromatic ring; When the number of P is 2 or more, the Ps may be the same or different, and when the number of Q is 2 or more, the Qs may be the same or different;
l1 is 0 or 1;
l2 is an integer from 0 to 2;
when l1 and l2 are both 0, A represents a single bond when T is a single bond;
when l1 is 1, B represents a single bond when T is a single bond;
H and I are each independently a group selected from a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, and combinations thereof.

The side chain may be any one type of photosensitive side chain selected from the group consisting of the following formulas (7) to (10).
In which A, B, D, Y ₁ , X, Y ₂ and R have the same definition as above;
l represents an integer of 1 to 12;
m represents an integer of 0 to 2, and m1 and m2 represent an integer of 1 to 3;
n represents an integer of 0 to 12 (however, when n = 0, B is a single bond).

The side chain may be any one type of photosensitive side chain selected from the group consisting of the following formulas (11) to (13).
In the formula, A, X, l, m, m1 and R have the same definition as above.

The side chain may be a photosensitive side chain represented by the following formula (14) or (15).
In the formula, A, Y ₁ , l, m1 and m2 have the same definition as above.

The side chain may be a photosensitive side chain represented by the following formula (16) or (17).
In the formula, A, X, l and m have the same definition as above.

The side chain is preferably a photosensitive side chain represented by the following formula (18) or (19).
In the formula, A, B, Y ₁ , q1, q2, m1, and m2 have the same definition as above.
R ₁ is a hydrogen atom, —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. Represents an oxy group.

The side chain is preferably a photosensitive side chain represented by the following formula (20).
In the formula, A, Y ₁ , X, l and m have the same definition as above.

The (A) side chain polymer preferably has any one liquid crystalline side chain selected from the group consisting of the following formulas (21) to (31).
In which A and B have the same definition as above;
Y ₃ is a group selected from the group consisting of a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, nitrogen-containing heterocycle, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. And each hydrogen atom bonded thereto may be independently substituted with —NO ₂ , —CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms;
R ₃ is a hydrogen atom, —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, halogen group, monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, nitrogen-containing A heterocyclic ring, an alicyclic hydrocarbon having 5 to 8 carbon atoms, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms;
one of q1 and q2 is 1 and the other is 0;
l represents an integer of 1 to 12, m represents an integer of 0 to 2, provided that in formulas (23) to (24), the sum of all m is 2 or more, and formulas (25) to (26 ), The sum of all m is 1 or more, and m1, m2 and m3 each independently represents an integer of 1 to 3;
R ₂ is a hydrogen atom, —NO ₂ , —CN, a halogen group, a monovalent benzene ring, a naphthalene ring, a biphenyl ring, a furan ring, a nitrogen-containing heterocyclic ring, and an alicyclic hydrocarbon having 5 to 8 carbon atoms, And represents an alkyl group or an alkyloxy group;
Z ₁ and Z _{2 each} represents a single bond, —CO—, —CH ₂ O—, —CH═N—, or —CF ₂ —.

<< Production Method of Photosensitive Side Chain Polymer >>
The photosensitive side chain polymer capable of exhibiting the above liquid crystallinity can be obtained by polymerizing the photoreactive side chain monomer having the above photosensitive side chain and the liquid crystalline side chain monomer.

[Monomer having side chain represented by formula (0)]
Specific examples of the monomer having a side chain represented by the formula (0) include hydrocarbon, (meth) acrylate, itaconate, fumarate, maleate, α-methylene-γ-butyrolactone, styrene, vinyl, and maleimide. It is preferably a structure having a polymerizable group composed of at least one selected from the group consisting of radical polymerizable groups such as norbornene and siloxane, and a side chain represented by the above formula (0).

  Among such monomers, specific examples of the monomer having an epoxy group include compounds such as glycidyl (meth) acrylate, (3,4-epoxycyclohexyl) methyl (meth) acrylate, and allyl glycidyl ether. Among them, glycidyl (meth) acrylate, (3,4-epoxycyclohexyl) methyl (meth) acrylate, 3-ethenyl-7-oxabicyclo [4.1.0] heptane, 1,2-epoxy-5 Examples include hexene and 1,7-octadiene monoepoxide.

  Specific examples of the monomer having thiirane include those in which the epoxy structure of the monomer having the epoxy group is replaced with thiirane.

  Specific examples of the monomer having an aziridine include those in which the epoxy structure of the monomer having an epoxy group is replaced with aziridine or 1-methylaziridine.

  Examples of the monomer having an oxetane group include (meth) acrylic acid ester having an oxetane group. Among such monomers, 3- (methacryloyloxymethyl) oxetane, 3- (acryloyloxymethyl) oxetane, 3- (methacryloyloxymethyl) -3-ethyl-oxetane, 3- (acryloyloxymethyl) -3- Ethyl-oxetane, 3- (methacryloyloxymethyl) -2-trifluoromethyloxetane, 3- (acryloyloxymethyl) -2-trifluoromethyloxetane, 3- (methacryloyloxymethyl) -2-phenyl-oxetane, 3- (Acryloyloxymethyl) -2-phenyl-oxetane, 2- (methacryloyloxymethyl) oxetane, 2- (acryloyloxymethyl) oxetane, 2- (methacryloyloxymethyl) -4-trifluoromethyloxetane, 2- (acryloyl) Oxymethyl) -4-trifluoromethyl oxetane are preferable, 3- (methacryloyloxy) -3-ethyl - oxetane, 3- (acryloyloxy-methyl) -3-ethyl - oxetane, and the like.

  As the monomer having a thietane group, for example, a monomer in which the oxetane group of the monomer having an oxetane group is replaced with a thietane group is preferable.

  As the monomer having an azetan group, for example, a monomer in which an oxetane group of a monomer having an oxetane group is replaced with an azetan group is preferable.

  Among the above, a monomer having an epoxy group and a monomer having an oxetane group are preferable from the viewpoint of availability and the like, and a monomer having an epoxy group is more preferable. Among these, glycidyl (meth) acrylate is preferable from the viewpoint of availability.

[Photoreactive side chain monomer]
The photoreactive side chain monomer is a monomer capable of forming a polymer having a photosensitive side chain at the side chain portion of the polymer when the polymer is formed.
As the photoreactive group possessed by the side chain, the following structures and derivatives thereof are preferred.

  More specific examples of the photoreactive side chain monomer include radical polymerizable groups such as hydrocarbon, (meth) acrylate, itaconate, fumarate, maleate, α-methylene-γ-butyrolactone, styrene, vinyl, maleimide and norbornene. And a polymerizable side group composed of at least one selected from the group consisting of siloxane and a photosensitive side chain consisting of at least one of the above formulas (1) to (6), preferably, for example, the above formula (7 ) To (10), a photosensitive side chain comprising at least one of the above formulas (11) to (13), and a photosensitivity represented by the above formula (14) or (15). A photosensitive side chain, a photosensitive side chain represented by the above formula (16) or (17), a photosensitive side chain represented by the above formula (18) or (19), and a photosensitivity represented by the above formula (20). Has sex side chain It is preferable that the structure be

The present application relates to photoreactive and / or liquid crystalline side chain monomers as novel compounds (1) to (11) represented by the following formulas (1) to (11); and the following formulas (12) to (17). The compounds (12) to (17) represented by:
In the formula, R represents a hydrogen atom or a methyl group; S represents an alkylene group having 2 to 10 carbon atoms; R ¹⁰ represents Br or CN; S represents an alkylene group having 2 to 10 carbon atoms; u represents Represents 0 or 1; and Py represents a 2-pyridyl group, a 3-pyridyl group or a 4-pyridyl group. V represents 1 or 2.

[Liquid crystal side chain monomer]
The liquid crystalline side chain monomer is a monomer in which a polymer derived from the monomer exhibits liquid crystallinity and the polymer can form a mesogenic group at a side chain site.
As a mesogenic group having a side chain, even if it is a group having a mesogen structure alone such as biphenyl or phenylbenzoate, or a group having a mesogen structure by hydrogen bonding between side chains such as benzoic acid Good. As the mesogenic group possessed by the side chain, the following structure is preferable.

  More specific examples of the liquid crystalline side chain monomer include hydrocarbon, (meth) acrylate, itaconate, fumarate, maleate, α-methylene-γ-butyrolactone, styrene, vinyl, maleimide, norbornene and other radical polymerizable groups. A structure having a polymerizable group composed of at least one selected from the group consisting of siloxanes and a side chain composed of at least one of the above formulas (21) to (31) is preferable.

  (A) The side chain polymer can be obtained by the polymerization reaction of the above-described photoreactive side chain monomer exhibiting liquid crystallinity. Further, it can be obtained by copolymerization of a photoreactive side chain monomer that does not exhibit liquid crystallinity and a liquid crystalline side chain monomer, or by copolymerization of a photoreactive side chain monomer that exhibits liquid crystallinity and a liquid crystalline side chain monomer. it can. Furthermore, it can be copolymerized with other monomers as long as the liquid crystallinity is not impaired.

Examples of other monomers include industrially available monomers capable of radical polymerization reaction.
Specific examples of the other monomer include unsaturated carboxylic acid, acrylic ester compound, methacrylic ester compound, maleimide compound, acrylonitrile, maleic anhydride, styrene compound and vinyl compound.

  Specific examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid and the like.

  Examples of the acrylate compound include methyl acrylate, ethyl acrylate, isopropyl acrylate, benzyl acrylate, naphthyl acrylate, anthryl acrylate, anthryl methyl acrylate, phenyl acrylate, 2,2,2-trifluoroethyl acrylate, and tert-butyl. Acrylate, cyclohexyl acrylate, isobornyl acrylate, 2-methoxyethyl acrylate, methoxytriethylene glycol acrylate, 2-ethoxyethyl acrylate, tetrahydrofurfuryl acrylate, 3-methoxybutyl acrylate, 2-methyl-2-adamantyl acrylate, 2- Propyl-2-adamantyl acrylate, 8-methyl-8-tricyclodecyl acrylate, and , Etc. 8-ethyl-8-tricyclodecyl acrylate.

  Examples of the methacrylic acid ester compound include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, benzyl methacrylate, naphthyl methacrylate, anthryl methacrylate, anthryl methyl methacrylate, phenyl methacrylate, 2,2,2-trifluoroethyl methacrylate, tert-butyl. Methacrylate, cyclohexyl methacrylate, isobornyl methacrylate, 2-methoxyethyl methacrylate, methoxytriethylene glycol methacrylate, 2-ethoxyethyl methacrylate, tetrahydrofurfuryl methacrylate, 3-methoxybutyl methacrylate, 2-methyl-2-adamantyl methacrylate, 2- Propyl-2-adamantyl methacrylate, 8-methyl 8 tricyclodecyl methacrylate, and, 8-ethyl-8-tricyclodecyl methacrylate.

  Examples of the vinyl compound include vinyl ether, methyl vinyl ether, benzyl vinyl ether, 2-hydroxyethyl vinyl ether, phenyl vinyl ether, and propyl vinyl ether.

  Examples of the styrene compound include styrene, methylstyrene, chlorostyrene, bromostyrene, and the like.

  Examples of maleimide compounds include maleimide, N-methylmaleimide, N-phenylmaleimide, and N-cyclohexylmaleimide.

  The content of the side chain represented by the formula (0) in the side chain type polymer of the present invention is preferably 0.1 mol% to 20 mol% from the viewpoints of improvement in reliability and influence on liquid crystal orientation. 0.5 mol% to 10 mol% is more preferable, and 1 mol% to 5 mol% is still more preferable.

  The content of the photoreactive side chain in the side chain polymer of the present invention is preferably 20 mol% to 99.9 mol%, more preferably 30 mol% to 95 mol%, from the viewpoint of liquid crystal alignment. More preferred is mol% to 90 mol%.

  The content of the liquid crystalline side chain in the side chain polymer of the present invention is preferably 80 mol% or less, more preferably 10 mol% to 70 mol%, and more preferably 20 mol% to 60 mol% from the viewpoint of liquid crystal alignment. Is more preferable.

  The side chain type polymer of the present invention may contain other side chains other than the side chain represented by the above formula (0), the photoreactive side chain, and the liquid crystalline side chain. The content is the remaining portion when the total content of the side chain, photoreactive side chain and liquid crystalline side chain represented by the above formula (0) is less than 100%.

  The method for producing the side chain polymer of the present embodiment is not particularly limited, and a general-purpose method that is handled industrially can be used. Specifically, it can be produced by cationic polymerization, radical polymerization, or anionic polymerization using a vinyl group of a liquid crystalline side chain monomer or photoreactive side chain monomer. Among these, radical polymerization is particularly preferable from the viewpoint of ease of reaction control.

  As the polymerization initiator for radical polymerization, a known compound such as a radical polymerization initiator or a reversible addition-cleavage chain transfer (RAFT) polymerization reagent can be used.

The radical thermal polymerization initiator is a compound that generates radicals by heating to a decomposition temperature or higher. Examples of such radical thermal polymerization initiators include ketone peroxides (methyl ethyl ketone peroxide, cyclohexanone peroxide, etc.), diacyl peroxides (acetyl peroxide, benzoyl peroxide, etc.), hydroperoxides (peroxidation). Hydrogen, tert-butyl hydride peroxide, cumene hydroperoxide, etc.), dialkyl peroxides (di-tert-butyl peroxide, dicumyl peroxide, dilauroyl peroxide, etc.), peroxyketals (dibutyl peroxy cyclohexane) Etc.), alkyl peresters (peroxyneodecanoic acid-tert-butyl ester, peroxypivalic acid-tert-butyl ester, peroxy 2-ethylcyclohex Sanic acid-tert-amyl ester, etc.), persulfates (potassium persulfate, sodium persulfate, ammonium persulfate, etc.), azo compounds (azobisisobutyronitrile, and 2,2'-di (2-hydroxyethyl) And azobisisobutyronitrile). Such radical thermal polymerization initiators can be used singly or in combination of two or more.

The radical photopolymerization initiator is not particularly limited as long as it is a compound that initiates radical polymerization by light irradiation. Examples of such radical photopolymerization initiators include benzophenone, Michler's ketone, 4,4′-bis (diethylamino) benzophenone, xanthone, thioxanthone, isopropylxanthone, 2,4-diethylthioxanthone, 2-ethylanthraquinone, acetophenone, 2-hydroxy 2-methylpropiophenone, 2-hydroxy-2-methyl-4′-isopropylpropiophenone, 1-hydroxycyclohexyl phenyl ketone, isopropyl benzoin ether, isobutyl benzoin ether, 2,2-diethoxyacetophenone, 2,2 -Dimethoxy-2-phenylacetophenone, camphorquinone, benzanthrone, 2-methyl-1- [4- (methylthio) phenyl]
2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone-1, ethyl 4-dimethylaminobenzoate, isoamyl 4-dimethylaminobenzoate, 4, 4′-di (t-butylperoxycarbonyl) benzophenone, 3,4,4′-tri (t-butylperoxycarbonyl) benzophenone, 2,4,6-trimethylbenzoyldiphenylphosphine oxide, 2- (4′-methoxy) Styryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (3 ′, 4′-dimethoxystyryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (2 ′, 4'-dimethoxystyryl) -4,6-bis (trichloromethyl) -s-triazine, 2- (2'-methoxystyryl) 4,6-bis (trichloromethyl) -s-triazine, 2- (4′-pentyloxystyryl) -4,6-bis (trichloromethyl) -s-triazine, 4- [pN, N-di ( Ethoxycarbonylmethyl)]-2,6-di (trichloromethyl) -s-triazine, 1,3-bis (trichloromethyl) -5- (2′-chlorophenyl) -s-triazine, 1,3-bis (trichloro Methyl) -5- (4′-methoxyphenyl) -s-triazine, 2- (p-dimethylaminostyryl) benzoxazole, 2- (p-dimethylaminostyryl) benzthiazole, 2-mercaptobenzothiazole, 3,3 '-Carbonylbis (7-diethylaminocoumarin), 2- (o-chlorophenyl) -4,4', 5,5'-tetraphenyl-1,2'-biimi Sol, 2,2′-bis (2-chlorophenyl) -4,4 ′, 5,5′-tetrakis (4-ethoxycarbonylphenyl) -1,2′-biimidazole, 2,2′-bis (2, 4-dichlorophenyl) -4,4 ′, 5,5′-tetraphenyl-1,2′-biimidazole, 2,2′bis (2,4-dibromophenyl) -4,4 ′, 5,5′- Tetraphenyl-1,2'-biimidazole, 2,2'-bis (2,4,6-trichlorophenyl) -4,4 ', 5,5'-tetraphenyl-1,2'-biimidazole, 3 -(2-methyl-2-dimethylaminopropionyl) carbazole, 3,6-bis (2-methyl-2-morpholinopropionyl) -9-n-dodecylcarbazole, 1-hydroxycyclohexyl phenyl ketone, bis (5-2, 4-cyclopentadi N-1-yl) -bis (2,6-difluoro-3- (1H-pyrrol-1-yl) -phenyl) titanium, 3,3 ′, 4,4′-tetra (t-butylperoxycarbonyl) benzophenone 3,3 ′, 4,4′-tetra (t-hexylperoxycarbonyl) benzophenone, 3,3′-di (methoxycarbonyl) -4,4′-di (t-butylperoxycarbonyl) benzophenone, 3,4 '-Di (methoxycarbonyl) -4,3'-di (t-butylperoxycarbonyl) benzophenone, 4,4'-di (methoxycarbonyl) -3,3'-di (t-butylperoxycarbonyl) benzophenone, 2, -(3-Methyl-3H-benzothiazol-2-ylidene) -1-naphthalen-2-yl-ethanone or 2- (3-methyl-1,3-benzothi Tetrazole -2 (3H) - ylidene) -1- (2-benzoyl) ethanone, and the like. These compounds may be used alone or in combination of two or more.

  The radical polymerization method is not particularly limited, and an emulsion polymerization method, suspension polymerization method, dispersion polymerization method, precipitation polymerization method, bulk polymerization method, solution polymerization method and the like can be used.

  The organic solvent used for the polymerization reaction of the photosensitive side chain polymer capable of exhibiting liquid crystallinity is not particularly limited as long as the generated polymer is soluble. Specific examples are given below.

  N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-methylcaprolactam, dimethyl sulfoxide, tetramethyl urea, pyridine, dimethyl sulfone, hexamethyl sulfoxide , Γ-butyrolactone, isopropyl alcohol, methoxymethylpentanol, dipentene, ethyl amyl ketone, methyl nonyl ketone, methyl ethyl ketone, methyl isoamyl ketone, methyl isopropyl ketone, methyl cellosolve, ethyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, butyl Carbitol, ethyl carbitol, ethylene glycol, ethylene glycol monoacetate, ethylene glycol monoisopropyl ether, ethyl Glycol monobutyl ether, propylene glycol, propylene glycol monoacetate, propylene glycol monomethyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monomethyl ether, diethylene glycol, diethylene glycol monoacetate, diethylene glycol dimethyl ether, dipropylene glycol monoacetate monomethyl ether, dipropylene glycol Monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoacetate monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monoacetate monopropyl ether, 3-methyl-3-methoxybutyl acetate, tripropylene Glycol methyl ether, 3-methyl-3-methoxybutanol, diisopropyl ether, ethyl isobutyl ether, diisobutylene, amyl acetate, butyl butyrate, butyl ether, diisobutyl ketone, methylcyclohexene, propyl ether, dihexyl ether, dioxane, n- Hexane, n-pentane, n-octane, diethyl ether, cyclohexanone, ethylene carbonate, propylene carbonate, methyl lactate, ethyl lactate, methyl acetate, ethyl acetate, n-butyl acetate, propylene glycol monoethyl ether, methyl pyruvate, Ethyl pyruvate, methyl 3-methoxypropionate, methyl ethyl 3-ethoxypropionate, ethyl 3-methoxypropionate, 3-ethoxypropion , 3-methoxypropionic acid, propyl 3-methoxypropionate, butyl 3-methoxypropionate, diglyme, 4-hydroxy-4-methyl-2-pentanone, 3-methoxy-N, N-dimethylpropanamide, 3-ethoxy -N, N-dimethylpropanamide, 3-butoxy-N, N-dimethylpropanamide and the like can be mentioned.

These organic solvents may be used alone or in combination. Furthermore, even if it is a solvent which does not dissolve the polymer | macromolecule to produce | generate, you may mix and use the above-mentioned organic solvent in the range which the polymer | macromolecule produced | generated does not precipitate.
In radical polymerization, oxygen in the organic solvent becomes a cause of inhibiting the polymerization reaction. Therefore, it is preferable to use an organic solvent that has been deaerated to the extent possible.

  The polymerization temperature during radical polymerization can be selected from 30 ° C. to 150 ° C., but is preferably in the range of 50 ° C. to 100 ° C. The reaction can be carried out at any concentration, but if the concentration is too low, it is difficult to obtain a high molecular weight polymer, and if the concentration is too high, the viscosity of the reaction solution becomes too high and uniform stirring is difficult. Therefore, the monomer concentration is preferably 1% by mass to 50% by mass, more preferably 5% by mass to 30% by mass. The initial stage of the reaction is carried out at a high concentration, and then an organic solvent can be added.

  In the above-mentioned radical polymerization reaction, the molecular weight of the obtained polymer is decreased when the ratio of the radical polymerization initiator is large relative to the monomer, and the molecular weight of the obtained polymer is increased when the ratio is small, the ratio of the radical initiator is It is preferable that it is 0.1 mol%-10 mol% with respect to the monomer to superpose | polymerize. Further, various monomer components, solvents, initiators and the like can be added during the polymerization.

[Recovery of polymer]
When recovering the produced polymer from the reaction solution of the photosensitive side chain polymer capable of exhibiting liquid crystallinity obtained by the above reaction, the reaction solution is put into a poor solvent, The coalescence can be precipitated. Examples of the poor solvent used for precipitation include methanol, acetone, hexane, heptane, butyl cellosolve, heptane, methyl ethyl ketone, methyl isobutyl ketone, ethanol, toluene, benzene, diethyl ether, methyl ethyl ether, and water. The polymer deposited in a poor solvent and precipitated can be recovered by filtration and then dried at normal temperature or under reduced pressure at room temperature or by heating. Moreover, when the polymer which carried out precipitation collection | recovery is re-dissolved in an organic solvent and the operation which carries out reprecipitation collection | recovery is repeated 2 to 10 times, the impurity in a polymer can be decreased. Examples of the poor solvent at this time include alcohols, ketones, hydrocarbons and the like, and it is preferable to use three or more kinds of poor solvents selected from these because purification efficiency is further improved.

  The molecular weight of the (A) side chain polymer of the present invention is measured by the GPC (Gel Permeation Chromatography) method in consideration of the strength of the obtained coating film, workability during coating film formation, and coating film uniformity. The weight average molecular weight is preferably 2000 to 1000000, more preferably 5000 to 200000.

[Preparation of polymer composition]
The polymer composition used in the present invention is preferably prepared as a coating solution so as to be suitable for forming a liquid crystal alignment film. That is, the polymer composition used in the present invention is preferably prepared as a solution in which a resin component for forming a resin film is dissolved in an organic solvent. Here, the resin component is a resin component containing a photosensitive side chain polymer capable of exhibiting the liquid crystallinity already described. In that case, the content of the resin component is preferably 1% by mass to 20% by mass, more preferably 3% by mass to 15% by mass, and particularly preferably 3% by mass to 10% by mass.

In the polymer composition of the present embodiment, the resin component described above may be a photosensitive side chain polymer that can all exhibit the above-described liquid crystallinity, but does not impair the liquid crystal developing ability and the photosensitive performance. Other polymers may be mixed within the range. In that case, content of the other polymer in a resin component is 0.5 mass%-80 mass%, Preferably it is 1 mass%-50 mass%.
Examples of such other polymers include polymers that are made of poly (meth) acrylate, polyamic acid, polyimide, and the like and are not a photosensitive side chain polymer that can exhibit liquid crystallinity.

<Amine compound>
The polymer composition used in the present invention has a specific amine compound, specifically, one primary amino group and a nitrogen-containing aromatic heterocyclic ring in the molecule, and the primary amino group is a fatty acid. It is preferable to have an amine compound bonded to an aromatic hydrocarbon group or a non-aromatic cyclic hydrocarbon group. By including such an amine compound, it is possible to reduce elution of ionic impurities and promote the cross-linking reaction of the group represented by the above formula (0) when the liquid crystal alignment film is used. A liquid crystal alignment film having a high thickness can be obtained.

  The specific amine compound is not particularly limited as long as it exhibits the following effects i) and / or ii) when the polymer composition used in the present invention forms a liquid crystal alignment film. i) Adsorbs ionic impurities in the liquid crystal at the liquid crystal alignment film interface and / or ii) exhibits improved voltage holding ratio.

  The amount of the specific amine compound is not particularly limited as long as the above-described effect is obtained, but is 0.01 to 10 parts by mass, preferably 0.1 to 5 parts in 100 parts by mass of the polymer composition used in the present invention. It is good that it is a mass part.

  Specific examples of the aliphatic hydrocarbon group include a linear alkylene group, an alkylene group having a branched structure, and a divalent hydrocarbon group having an unsaturated bond. The number of carbon atoms of the aliphatic hydrocarbon group is preferably 1-20, more preferably 1-15, and still more preferably 1-10.

  Specific examples of the divalent non-aromatic cyclic hydrocarbon group include cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane ring, cycloheptane ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane Ring, cyclotridecane ring, cyclotetradecane ring, cyclopentadecane ring, cyclohexadecane ring, cycloheptadecane ring, cyclooctadecane ring, cyclononadecane ring, cycloicosane ring, tricycloeicosan ring, tricyclodecosan ring, bicycloheptane ring, Examples include a decahydronaphthalene ring, a norbornene ring, an adamantane ring, and the like. Preferably, it is a ring having 3 to 20 carbon atoms, more preferably a ring having 3 to 15 carbon atoms, and still more preferably a non-aromatic cyclic hydrocarbon group having 3 to 10 carbon atoms. It is.

The nitrogen-containing aromatic heterocycle contained in the amine compound is represented by the following formula [20a], formula [20b] and formula [20c] (wherein Z ₂ is a linear or branched alkyl group having 1 to 5 carbon atoms. It is good that it is an aromatic cyclic hydrocarbon containing at least 1, preferably 1 to 4 structures selected from the group consisting of:

  Specifically, pyrrole ring, imidazole ring, oxazole ring, thiazole ring, pyrazole ring, pyridine ring, pyrimidine ring, quinoline ring, pyrazoline ring, isoquinoline ring, carbazole ring, purine ring, thiadiazole ring, pyridazine ring, pyrazoline ring, List triazine ring, pyrazolidine ring, triazole ring, pyrazine ring, benzimidazole ring, benzimidazole ring, thionoline ring, phenanthroline ring, indole ring, quinoxaline ring, benzothiazole ring, phenothiazine ring, oxadiazole ring, acridine ring, etc. Can do. Furthermore, the carbon atom of these nitrogen-containing aromatic heterocycles may have a substituent containing a heteroatom.

More preferred amine compounds are those represented by the following formula A- [1] (wherein Y ₁₁ is a divalent organic group having an aliphatic hydrocarbon group or a non-aromatic cyclic hydrocarbon group, and Y ₁₂ is nitrogen-containing). It is preferable that the amine compound be an aromatic heterocyclic ring. In Formula A- [1], Y ₁₂ is not particularly limited as long as Y ₁₂ is a divalent organic group having an aliphatic hydrocarbon group or a non-aromatic cyclic hydrocarbon group.

Preferred Y ₁₁ in Formula A- [1] is a divalent organic group having one kind selected from an aliphatic hydrocarbon group having 1 to 20 carbon atoms and a non-aromatic cyclic hydrocarbon group having 3 to 20 carbon atoms. It is good to be. Examples of the non-aromatic cyclic hydrocarbon group include the above-described structures. Y ₁₁ is more preferably an aliphatic hydrocarbon group having 1 to 15 carbon atoms, cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane ring, cycloheptane ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring. , Cyclododecane ring, cyclotridecane ring, cyclotetradecane ring, norbornene ring, adamantane ring and the like. Y ₁₁ is particularly preferably a linear or branched alkylene group having 1 to 10 carbon atoms.

In addition, —CH ₂ — in any aliphatic hydrocarbon group or non-aromatic cyclic hydrocarbon group that is not adjacent to the amino group contained in Y ₁₁ is —O—, —NH—, —CO—O—. , -O-CO -, - CO -NH -, - NH-CO -, - CO -, - S -, - S (O) 2 -, - CF 2 -, - C (CF 3) 2 -, - _{C (CH 3) 2 -,} - Si (CH 3) 2 -, - O-Si (CH 3) 2 -, - Si (CH 3) 2 -O -, - O-Si (CH 3) 2 -O -It may be replaced by a divalent cyclic hydrocarbon group or a heterocyclic ring. Further, the hydrogen atom bonded to any carbon atom is a linear or branched alkylene group having 1 to 20 carbon atoms, a cyclic hydrocarbon group, a fluorine-containing alkyl group having 1 to 10 carbon atoms, a heterocyclic ring, a fluorine atom, It may be replaced with a hydroxyl group.

  Specific examples of the divalent cyclic hydrocarbon group include benzene ring, naphthalene ring, tetrahydronaphthalene ring, azulene ring, indene ring, fluorene ring, anthracene ring, phenanthrene ring, phenalene ring, cyclopropane ring, cyclobutane ring, cyclopentane ring , Cyclohexane ring, cycloheptane ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane ring, cyclotridecane ring, cyclotetradecane ring, cyclopentadecane ring, cyclohexadecane ring, cycloheptadecane ring, cyclooctadecane ring Ring, cyclononadecane ring, cycloicosane ring, tricycloeicosane ring, tricyclodecosan ring, bicycloheptane ring, decahydronaphthalene ring, norbornene ring, adamantane ring and the like.

  Specific examples of the divalent heterocyclic ring include pyrrole ring, imidazole ring, oxazole ring, thiazole ring, pyrazole ring, pyridine ring, pyrimidine ring, quinoline ring, pyrazoline ring, isoquinoline ring, carbazole ring, purine ring, thiadiazole ring. , Pyridazine ring, pyrazoline ring, triazine ring, pyrazolidine ring, triazole ring, pyrazine ring, benzimidazole ring, benzimidazole ring, thionoline ring, phenanthroline ring, indole ring, quinoxaline ring, benzothiazole ring, phenothiazine ring, oxadiazole ring And acridine ring.

Y ₁₂ in Formula A- [1] is a nitrogen-containing aromatic heterocycle, and, as described above, at least one selected from the group consisting of Formula [20a], Formula [20b], and Formula [20c] An aromatic cyclic hydrocarbon containing the structure Specific examples thereof include the structure described above. Among these, pyrrole ring, imidazole ring, pyrazole ring, pyridine ring, pyrimidine ring, pyridazine ring, triazine ring, triazole ring, pyrazine ring, benzimidazole ring, benzimidazole ring, quinoxaline ring, azepine ring, diazepine ring, naphthyridine ring , A phenazine ring and a phthalazine ring are preferable.

From the viewpoint of ease of electrostatic interaction such as salt formation and hydrogen bonding between the nitrogen-containing aromatic heterocycle and the carboxyl group in the specific polyimide, Y ₁₁ is a formula [20a], a formula included in Y ₁₂ It is preferably bonded to a substituent not adjacent to [20b] and formula [20c].
Further, the carbon atom of the nitrogen-containing aromatic heterocyclic ring which is Y ₁₂ in the formula A- [1] may have a halogen atom and / or a substituent of an organic group, and the organic group is an oxygen atom, sulfur You may contain hetero atoms, such as an atom and a nitrogen atom.

A preferable combination of Y ₁₁ and Y ₁₂ in Formula A- [1] is a group in which Y ₁₁ is an aliphatic hydrocarbon group having 1 to 20 carbon atoms and a non-aromatic cyclic hydrocarbon group having 3 to 20 carbon atoms. Y ₁₂ is a pyrrole ring, imidazole ring, pyrazole ring, pyridine ring, pyrimidine ring, pyridazine ring, triazine ring, triazole ring, pyrazine ring, benzimidazole ring, A benzimidazole ring, a quinoxaline ring, an azepine ring, a diazepine ring, a naphthyridine ring, a phenazine ring, or a phthalazine ring. In addition, the carbon atom of the nitrogen-containing aromatic heterocycle of Y ₁₂ may have a halogen atom and / or a substituent of an organic group, and the organic group is a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom. It may contain.
As a more preferred amine compound, the following formula A- [2] (wherein Y ₁₃ is a divalent aliphatic hydrocarbon group having 1 to 10 carbon atoms or a non-aromatic cyclic hydrocarbon group, and Y ₁₄ Is a single bond, or —O—, —NH—, —S—, —SO ₂ — or a divalent organic group having 1 to 19 carbon atoms, and the total of carbon atoms of Y ₁₃ and Y ₁₄ . Is an amine compound represented by Y ₁₅ is a nitrogen-containing aromatic heterocyclic ring.

Y ₁₃ in Formula A- [2] is a C 1-10 divalent aliphatic hydrocarbon group or non-aromatic cyclic hydrocarbon group. Specific examples thereof include a linear or branched alkylene group having 1 to 10 carbon atoms, an unsaturated alkylene group having 1 to 10 carbon atoms, a cyclopropane ring, a cyclobutane ring, a cyclopentane ring, a cyclohexane ring, a cycloheptane ring, a cyclo Octane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane ring, cyclotridecane ring, cyclotetradecane ring, cyclopentadecane ring, cyclohexadecane ring, cycloheptadecane ring, cyclooctadecane ring, cyclononadecane ring, cycloicosane ring, trio A cycloeicosane ring, a tricyclodecosan ring, a bicycloheptane ring, a decahydronaphthalene ring, a norbornene ring, an adamantane ring, and the like. More preferably, a linear or branched alkylene group having 1 to 10 carbon atoms, cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane ring, cycloheptane ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane And a ring, a cyclotridecane ring, a cyclotetradecane ring, a norbornene ring, and an adamantane ring. Particularly preferred is a linear or branched alkylene group having 1 to 10 carbon atoms.

—CH ₂ — in any aliphatic hydrocarbon group or non-aromatic cyclic hydrocarbon group that is not adjacent to the amino group included in Y ₁₃ is —O—, —NH—, —CO—O—, — O—CO—, —CO—NH—, —NH—CO—, —CO—, —S—, —S (O) ₂ —, —CF ₂ —, —C (CF ₃ ) ₂ —, —C ( _{CH 3) 2 -, - Si} (CH 3) 2 -, - O-Si (CH 3) 2 -, - Si (CH 3) 2 -O -, - O-Si (CH 3) 2 -O-, It may be replaced with a divalent cyclic hydrocarbon group or a heterocyclic ring. Further, the hydrogen atom bonded to any carbon atom is a linear or branched alkyl group having 1 to 20 carbon atoms, a cyclic hydrocarbon group, a fluorine-containing alkyl group having 1 to 10 carbon atoms, a heterocyclic ring, a fluorine atom, It may be replaced with a hydroxyl group. The cyclic hydrocarbon group and the heterocyclic ring referred to here have the same meaning as defined for Y ₁₁ in Formula A- [1].

Y ₁₄ in Formula A- [2] is a single bond, or —O—, —NH—, —S—, —SO ₂ — or a divalent organic group having 1 to 19 carbon atoms. The divalent organic group having 1 to 19 carbon atoms is a divalent organic group having 1 to 19 carbon atoms, and may contain an oxygen atom, a nitrogen atom, a sulfur atom, a silicon atom, or the like. Specific examples of such Y ₁₄ are given below.

For example, a single bond, —O—, —NH—, —S—, —SO ₂ —, a hydrocarbon group having 1 to 19 carbon atoms, —CO—O—, —O—CO—, —CO—NH—, _{-NH-CO -, - CO -} , - CF 2 -, - C (CF 3) 2 -, - CH (OH) -, - C (CH 3) 2 -, - Si (CH 3) 2 -, - O—Si (CH ₃ ) ₂ —, —Si (CH ₃ ) ₂ —O—, —O—Si (CH ₃ ) ₂ —O—, cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane ring, cycloheptane Ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane ring, cyclotridecane ring, cyclotetradecane ring, cyclopentadecane ring, cyclohexadecane ring, cycloheptadecane ring, cyclooctadecane ring, cyclononadecane Ring, cycloicosane ring, tricycloeicosane ring, tricyclodecosan ring, bicycloheptane ring, decahydronaphthalene ring, norbornene ring, adamantane ring, benzene ring, naphthalene ring, tetrahydronaphthalene ring, azulene ring, indene ring, fluorene ring , Anthracene ring, phenanthrene ring, phenalene ring, pyrrole ring, imidazole ring, oxazole ring, thiazole ring, pyrazole ring, pyridine ring, pyrimidine ring, quinoline ring, pyrazoline ring, isoquinoline ring, carbazole ring, purine ring, thiadiazole ring, pyridazine Ring, triazine ring, pyrazolidine ring, triazole ring, pyrazine ring, benzimidazole ring, benzimidazole ring, thionoline ring, phenanthroline ring, indole ring, quinoxaline ring, benzothiazole ring, Phenothiazine ring, an oxadiazole ring, an acridine ring, an oxazole ring, piperazine ring, piperidine ring, dioxane ring, morpholine ring and the like. Y ₁₄ may contain two or more of these.

Specific examples including two or more of these include —NH—CH ₂ —, —NH—C ₂ H ₄ —, —NH—C ₃ H ₆ —, —NH—C ₄ H ₈ —, —S—CH _{2. -, - S-C 2 H} 4 -, - S-C 3 H 6 -, - S-C 4 H 8 -, - O-CH 2 -, - O-C 2 H 4 -, - O-C 3 _{H 6 -, - O-C} 4 H 8 -, - NH-CO-CH 2 -, - NH-CO-C 2 H 4 -, - NH-CO-C 3 H 6 -, - NH-CO-C _{4 H 8 -, - CO-} CH 2 -, - CO-C 2 H 4 -, - CO-C 3 H 6 -, - CO-C 4 H 8 -, - CO-NH-CH 2 -, - CO _{-NH-C 2 H 4 -,} - CO-NH-C 3 H 6 -, - CO-NH-C 4 H 8 -, - NH-CH 2 -CH (CH 3) -, - NH-C 2 H ₄ -CH _(CH 3) - , —NH—C ₃ H ₆ —CH (CH ₃ ) —, —NH—C ₄ H ₈ —CH (CH ₃ ) —, —S—CH ₂ —CH (CH ₃ ) —, —S—C ₂ H _{4 -CH (CH 3) -,} - S-C 3 H 6 -CH (CH 3) -, - S-C 4 H 8 -CH (CH 3) -, - O-CH 3 -CH (CH 3) _{-, - O-C 2 H} 4 -CH (CH 3) -, - O-C 3 H 6 -CH (CH 3) -, - O-C 4 H 8 -CH (CH 3) -, - NH- _{CO-CH 2 -CH (CH 3} ) -, - NH-CO-C 2 H 4 -CH (CH 3) -, - NH-CO-C 3 H 6 -CH (CH 3) -, - NH-CO _{-C 4 H 8 -CH (CH 3} ) -, - CH (OH) -CH 2 -, - CH (OH) -C 2 H 4 -, - CH (OH) -C 3 H 6 -, - CH ( OH) -C _{4 H 8 -, - CH (} CH 2 OH) -CH 2 -, - CH (CH 2 OH) -C 2 H 4 -, - CH (CH 2 OH) -C 3 H 6 -, - CH (CH 2 _{OH) -C 4 H 8 -,} - NH-CH (CH 2 OH) -CH 2 -, - CO-NH-CH (CH 2 OH) -CH 2 -, - NH-CO-CH (CH 2 OH) _{-CH 2 -, - CO-CH} (CH 2 OH) -CH 2 -, - S-CH (CH 2 OH) -CH 2 -, - O-CH (CH 2 OH) -CH 2 -, - CH ( _{N (CH 3) 2) -} , - C 6 H 4 -O -, - C 6 H 4 -NH -, - C 6 H 4 -CO-NH -, - C 6 H 4 -NH-CO -, - _{C 6 H 4 -CO -, -} C 6 H 4 -CH 2 -, - C 6 H 4 -S- , and the like.

Y ₁₅ in the formula A- [2] is a nitrogen-containing aromatic heterocyclic ring, and is the same as the definition of Y _{12 in} the formula A- [1]. Specific examples may include the same structure as Y ₁₂ described above. Among these, pyrrole ring, imidazole ring, pyrazole ring, pyridine ring, pyrimidine ring, pyridazine ring, triazine ring, triazole ring, pyrazine ring, benzimidazole ring, benzimidazole ring, quinoxaline ring, azepine ring, diazepine ring, naphthyridine ring , A phenazine ring, or a phthalazine ring is preferable.

From the viewpoint of ease of electrostatic interaction such as salt formation and hydrogen bonding between the nitrogen-containing aromatic heterocycle and the carboxyl group in the specific polyimide, Y ₁₄ is a formula [20a] or formula included in Y _15. It is preferably bonded to a carbon atom that is not adjacent to [20b] or formula [20c].
Furthermore, the carbon atom of the nitrogen-containing aromatic heterocyclic ring which is Y ₁₅ in Formula A- [2] may have a halogen atom and / or a substituent of an organic group, and the organic group is an oxygen atom or a sulfur atom. And may contain a hetero atom such as a nitrogen atom.

In a preferred combination of Y ₁₃ , Y ₁₄ and Y ₁₅ in Formula A- [2], Y ₁₃ is a linear or branched alkylene group having 1 to 10 carbon atoms, cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane ring , Cycloheptane ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane ring, cyclotridecane ring, cyclotetradecane ring, norbornene ring or adamantane ring, and Y ₁₄ is a single bond, having 1 carbon atom To 10 linear or branched alkylene groups, —O—, —NH—, —CO—O—, —O—CO—, —CO—NH—, —NH—CO—, —CO—, —S—, _{-SO 2 -, - CF 2 -} , - C (CF 3) 2 -, - Si (CH 3) 2 -, - O-Si (CH 3) 2 -, - Si (CH 3) 2 -O _{, -O-Si (CH 3)} 2 -O -, - CH (OH) -, - NH-CH 2 -, - NH-C 2 H 4 -, - NH-C 3 H 6 -, - NH-C _{4 H 8 -, - S-} CH 2 -, - S-C 2 H 4 -, - S-C 3 H 6 -, - S-C 4 H 8 -, - O-CH 2 -, - O-C _{2 H 4 -, - O-} C 3 H 6 -, - O-C 4 H 8 -, - NH-CO-CH 2 -, - NH-CO-C 2 H 4 -, - NH-CO-C 3 _{H 6 -, - NH-CO} -C 4 H 8 -, - CO-CH 2 -, - CO-C 2 H 4 -, - CO-C 3 H 6 -, - CO-C 4 H 8 -, - _{CO-NH-CH 2 -,} - CO-NH-C 2 H 4 -, - CO-NH-C 3 H 6 -, - CO-NH-C 4 H 8 -, - NH-CH 2 -CH (CH _{3) -, - NH-C} 2 H 4 - _{CH (CH 3) -, -} NH-C 3 H 6 -CH (CH 3) -, - NH-C 4 H 8 -CH (CH 3) -, - S-CH 2 -CH (CH 3) -, —S—C ₂ H ₄ —CH (CH ₃ ) —, —S—C ₃ H ₆ —CH (CH ₃ ) —, —S—C ₄ H ₈ —CH (CH ₃ ) —, —O—CH _{3 -CH (CH 3) -, -} O-C 2 H 4 -CH (CH 3) -, - O-C 3 H 6 -CH (CH 3) -, - O-C 4 H 8 -CH (CH 3 _{) -, - NH-CO-} CH 2 -CH (CH 3) -, - NH-CO-C 2 H 4 -CH (CH 3) -, - NH-CO-C 3 H 6 -CH (CH 3) _{-, - NH-CO-C} 4 H 8 -CH (CH 3) -, - CH (OH) -CH 2 -, - CH (OH) -C 2 H 4 -, - CH (OH) -C 3 H ₆ -, _{CH (OH) -C 4 H 8} -, - CH (CH 2 OH) -CH 2 -, - CH (CH 2 OH) -C 2 H 4 -, - CH (CH 2 OH) -C 3 H 6 - _{, -CH (CH 2 OH) -C} 4 H 8 -, - NH-CH (CH 2 OH) -CH 2 -, - CO-NH-CH (CH 2 OH) -CH 2 -, - NH-CO- _{CH (CH 2 OH) -CH 2} -, - CO-CH (CH 2 OH) -CH 2 -, - S-CH (CH 2 OH) -CH 2 -, - O-CH (CH 2 OH) -CH _{2 -, - CH (N (} CH 3) 2) -, - C 6 H 4 -O -, - C 6 H 4 -NH -, - C 6 H 4 -CO-NH -, - C 6 H 4 - _{NH-CO -, - C 6} H 4 -CO -, - C 6 H 4 -CH 2 -, - C 6 H 4 -S-, cyclopropane ring, cyclobutane ring, Clopentane ring, cyclohexane ring, cycloheptane ring, cyclooctane ring, cyclononane ring, cyclodecane ring, cycloundecane ring, cyclododecane ring, norbornene ring, adamantane ring, benzene ring, naphthalene ring, tetrahydronaphthalene ring, azulene ring, indene ring, Fluorene ring, anthracene ring, phenanthrene ring, phenalene ring, and Y ₁₅ is a pyrrole ring, imidazole ring, pyrazole ring, pyridine ring, pyrimidine ring, pyridazine ring, triazine ring, triazole ring, pyrazine ring, benzimidazole ring, benzoimidazole ring An imidazole ring, a quinoxaline ring, an azepine ring, a diazepine ring, a naphthyridine ring, a phenazine ring, or a phthalazine ring. In addition, the carbon atom of the nitrogen-containing aromatic heterocyclic ring of Y ₁₅ may have a halogen atom and / or a substituent of an organic group, and the organic group is a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom. It may contain.

In a more preferable combination of Y ₁₃ , Y ₁₄ and Y ₁₅ in Formula A- [2], Y ₁₃ is a linear or branched alkylene group having 1 to 5 carbon atoms, cyclopropane ring, cyclobutane ring, cyclopentane ring, cyclohexane. A ring, a cycloheptane ring, a norbornene ring, or an adamantane ring, and Y ₁₄ is a single bond, a linear or branched alkylene group having 1 to 5 carbon atoms, —O—, —NH—, —CO—O—, — O—CO—, —CO—NH—, —NH—CO—, —CO—, —S—, —S (O) ₂ —, —CH (OH) —, —NH—CH ₂ —, —S—. _{CH 2 -, - O-CH} 2 -, - O-C 2 H 4 -, - NH-CO-CH 2 -, - CO-CH 2 -, - CO-NH-CH 2 -, - NH-CH 2 _{-CH (CH 3) -, -} S-CH 2 -CH (CH 3) -, - O _{CH 3 -CH (CH 3) -} , - NH-CO-CH 2 -CH (CH 3) -, - CH (OH) -CH 2 -, - CH (OH) -C 2 H 4 -, - CH ( _{CH 2 OH) -CH 2 -,} - NH-CH (CH 2 OH) -CH 2 -, - CO-NH-CH (CH 2 OH) -CH 2 -, - NH-CO-CH (CH 2 OH) _{-CH 2 -, - CO-CH} (CH 2 OH) -CH 2 -, - S-CH (CH 2 OH) -CH 2 -, - O-CH (CH 2 OH) -CH 2 -, - CH ( _{N (CH 3) 2) -} , - C 6 H 4 -O -, - C 6 H 4 -NH -, - C 6 H 4 -CO-NH -, - C 6 H 4 -NH-CO -, - _{C 6 H 4 -CO -, -} C 6 H 4 -CH 2 -, - C 6 H 4 -S-, cyclopropane ring, cyclobutane ring, cyclopentane , Cyclohexane ring, cycloheptane ring, norbornene ring, adamantane ring, a benzene ring, a naphthalene ring, tetrahydronaphthalene ring, azulene ring, an indene ring, a fluorene ring, an anthracene ring, phenanthrene ring, or phenalene ring, Y ₁₅ is a pyrrole Ring, imidazole ring, pyrazole ring, pyridine ring, pyrimidine ring, pyridazine ring, triazine ring, triazole ring, pyrazine ring, benzimidazole ring, benzimidazole ring, quinoxaline ring, azepine ring, diazepine ring, naphthyridine ring, phenazine ring, or It is a phthalazine ring. In addition, the carbon atom of the nitrogen-containing aromatic heterocyclic ring of Y ₁₅ may have a halogen atom and / or a substituent of an organic group, and the organic group is a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom. It may contain.

In a more preferable combination of Y ₁₃ , Y ₁₄ and Y ₁₅ in Formula A- [2], Y ₁₃ is a linear or branched alkylene group having 1 to 5 carbon atoms, a cyclopropane ring, a cyclobutane ring, a cyclopentane ring, or A cyclohexane ring, and Y ₁₄ is a single bond, a linear or branched alkylene group having 1 to 5 carbon atoms, —O—, —NH—, —CO—O—, —O—CO—, —CO—NH—. , -NH-CO -, - CO -, - CH (OH) -, - NH-CH 2 -, - S-CH 2 -, - O-CH 2 -, - NH-CO-CH 2 -, - CO _{-CH 2 -, - CO-NH} -CH 2 -, - NH-CH 2 -CH (CH 3) -, - S-CH 2 -CH (CH 3) -, - O-CH 3 -CH (CH 3 _{) -, - NH-CO-} CH 2 -CH (CH 3) -, - CH (OH) -CH _{-, - CH (OH) -C} 2 H 4 -, - CH (CH 2 OH) -CH 2 -, - NH-CH (CH 2 OH) -CH 2 -, - CO-NH-CH (CH 2 OH _{) -CH 2 -, - NH-} CO-CH (CH 2 OH) -CH 2 -, - CO-CH (CH 2 OH) -CH 2 -, - S-CH (CH 2 OH) -CH 2 -, _{-O-CH (CH 2 OH)} -CH 2 -, - CH (N (CH 3) 2) -, - C 6 H 4 -O -, - C 6 H 4 -NH -, - C 6 H 4 - _{CO-NH -, - C 6} H 4 -NH-CO -, - C 6 H 4 -CO -, - C 6 H 4 -CH 2 -, - C 6 H 4 -S-, cyclopropane ring, cyclobutane ring , Cyclopentane ring, cyclohexane ring, cycloheptane ring, norbornene ring, adamantane ring, benzene ring, naphthalene A tetrahydronaphthalene ring, fluorene ring, or an anthracene ring, Y ₁₅ is a pyrrole ring, an imidazole ring, a pyrazole ring, a pyridine ring, a pyrimidine ring, a pyridazine ring, a triazine ring, a triazole ring, a pyrazine ring, a benzimidazole ring, or It is a benzimidazole ring. In addition, the carbon atom of the nitrogen-containing aromatic heterocyclic ring of Y ₁₅ may have a halogen atom and / or a substituent of an organic group, and the organic group is a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom. It may contain.

A particularly preferred combination of Y ₁₃ , Y ₁₄ and Y ₁₅ in Formula A- [2] is that Y ₁₃ is a linear or branched alkylene group having 1 to 5 carbon atoms, a cyclobutane ring, or a cyclohexane ring, and Y ₁₄ is , Single bond, —O—, —CO—O—, —O—CO—, —CO—NH—, —NH—CO—, —CH (OH) —, benzene ring, naphthalene ring, fluorene ring, or anthracene Y ₁₅ is a pyrrole ring, an imidazole ring, a pyrazole ring, a pyridine ring, or a pyrimidine ring. In addition, the carbon atom of the nitrogen-containing aromatic heterocyclic ring of Y ₁₅ may have a halogen atom and / or a substituent of an organic group, and the organic group is a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom. It may contain.

  Specific examples of the specific amine compound of the component (B) of the present invention include compounds M1 to M156.

  More preferable compounds include M6 to M8, M10, M16 to M21, M31 to M36, M40 to M45, M47 to M57, M59 to M63, M68, M69, M72 to M82, M95 to M98, M100 to M103, M108 to M125, M128-M137, M139-M143, M149-M156 are mentioned. More preferable are M6 to M8, M16 to M20, M32 to M36, M40, M41, M44, M49 to M54, M59 to M62, M68, M69, M75 to M82, M100 to M103, M108 to M112, M114 to M116. M118 to M121, M125, M134 to M136, M139, M140, M143, M150, and M152 to M156.

<Organic solvent>
The organic solvent used for the polymer composition used in the present invention is not particularly limited as long as it is an organic solvent that dissolves the resin component. Specific examples are given below.
N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, N-methylcaprolactam, 2-pyrrolidone, N-ethylpyrrolidone, N-vinylpyrrolidone, dimethylsulfoxide, tetramethylurea, pyridine, Dimethylsulfone, hexamethylsulfoxide, γ-butyrolactone, 3-methoxy-N, N-dimethylpropanamide, 3-ethoxy-N, N-dimethylpropanamide, 3-butoxy-N, N-dimethylpropanamide, 1,3 -Dimethyl-imidazolidinone, ethyl amyl ketone, methyl nonyl ketone, methyl ethyl ketone, methyl isoamyl ketone, methyl isopropyl ketone, cyclohexanone, ethylene carbonate, propylene carbonate, diglyme, 4-hydroxy-4 Methyl-2-pentanone, propylene glycol monoacetate, propylene glycol monomethyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monomethyl ether, diethylene glycol, diethylene glycol monoacetate, diethylene glycol dimethyl ether, dipropylene glycol monoacetate monomethyl ether, dipropylene glycol monomethyl Ether, dipropylene glycol monoethyl ether, dipropylene glycol monoacetate monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monoacetate monopropyl ether, 3-methyl-3-methoxybutyl acetate, tripropylene glycol methyl ether, etc. Is mentioned. These may be used alone or in combination.

  The polymer composition used for this invention may contain components other than the said (A), (B) and (C) component. Examples thereof include solvents and compounds that improve the film thickness uniformity and surface smoothness when the polymer composition is applied, and compounds that improve the adhesion between the liquid crystal alignment film and the substrate. However, the present invention is not limited to this.

The following are mentioned as a specific example of the solvent (poor solvent) which improves the uniformity of film thickness and surface smoothness.
For example, isopropyl alcohol, methoxymethylpentanol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, butyl carbitol, ethyl carbitol, ethyl carbitol acetate, ethylene glycol, ethylene glycol monoacetate, ethylene glycol monoacetate Isopropyl ether, ethylene glycol monobutyl ether, propylene glycol, propylene glycol monoacetate, propylene glycol monomethyl ether, propylene glycol-tert-butyl ether, dipropylene glycol monomethyl ether, diethylene glycol, diethylene glycol monoacetate, diethylene glycol dimethyl ether, dipro Lenglycol monoacetate monomethyl ether, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol monoacetate monoethyl ether, dipropylene glycol monopropyl ether, dipropylene glycol monoacetate monopropyl ether, 3-methyl-3 -Methoxybutyl acetate, tripropylene glycol methyl ether, 3-methyl-3-methoxybutanol, diisopropyl ether, ethyl isobutyl ether, diisobutylene, amyl acetate, butyl butyrate, butyl ether, diisobutyl ketone, methylcyclohexene, propyl ether, dihexyl Ether, 1-hexanol, n-hexane, n-pentane, n-octane Diethyl ether, methyl lactate, ethyl lactate, methyl acetate, ethyl acetate, n-butyl acetate, propylene glycol monoethyl ether, methyl pyruvate, ethyl pyruvate, methyl 3-methoxypropionate, methyl ethyl 3-ethoxypropionate, Ethyl 3-methoxypropionate, 3-ethoxypropionic acid, 3-methoxypropionic acid, propyl 3-methoxypropionate, butyl 3-methoxypropionate, 1-methoxy-2-propanol, 1-ethoxy-2-propanol, 1 -Butoxy-2-propanol, 1-phenoxy-2-propanol, propylene glycol monoacetate, propylene glycol diacetate, propylene glycol-1-monomethyl ether-2-acetate, propylene glycol- Low 1-monoethyl ether-2-acetate, dipropylene glycol, 2- (2-ethoxypropoxy) propanol, lactate methyl ester, lactate ethyl ester, lactate n-propyl ester, lactate n-butyl ester, lactate isoamyl ester Examples include solvents having surface tension.

  These poor solvents may be used alone or in combination. When using the solvent as described above, it is preferably 5% by mass to 80% by mass of the total solvent, more preferably so as not to significantly reduce the solubility of the entire solvent contained in the polymer composition. Is 20% by mass to 60% by mass.

Examples of the compound that improves film thickness uniformity and surface smoothness include fluorine-based surfactants, silicone-based surfactants, and nonionic surfactants.
More specifically, for example, Ftop (registered trademark) 301, EF303, EF352 (manufactured by Tochem Products), MegaFac (registered trademark) F171, F173, R-30 (manufactured by DIC), Florard FC430, FC431 (Manufactured by Sumitomo 3M), Asahi Guard (registered trademark) AG710 (manufactured by Asahi Glass Company), Surflon (registered trademark) S-382, SC101, SC102, SC103, SC104, SC105, SC106 (manufactured by AGC Seimi Chemical Co., Ltd.) It is done. The use ratio of these surfactants is preferably 0.01 parts by mass to 2 parts by mass, more preferably 0.01 parts by mass to 1 part with respect to 100 parts by mass of the resin component contained in the polymer composition. Part by mass.

Specific examples of the compound that improves the adhesion between the liquid crystal alignment film and the substrate include the following functional silane-containing compounds.
For example, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 2-aminopropyltrimethoxysilane, 2-aminopropyltriethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, 3-ureidopropyltrimethoxysilane, 3-ureidopropyltriethoxysilane, N-ethoxycarbonyl-3-aminopropyltrimethoxysilane, N-ethoxy Carbonyl-3-aminopropyltriethoxysilane, N-triethoxysilylpropyltriethylenetriamine, N-trimethoxysilylpropyltriethylenetriamine, 10-trimethoxysilyl-1,4,7-triazadecane, 10-to Ethoxysilyl-1,4,7-triazadecane, 9-trimethoxysilyl-3,6-diazanonyl acetate, 9-triethoxysilyl-3,6-diazanonyl acetate, N-benzyl-3-aminopropyltri Methoxysilane, N-benzyl-3-aminopropyltriethoxysilane, N-phenyl-3-aminopropyltrimethoxysilane, N-phenyl-3-aminopropyltriethoxysilane, N-bis (oxyethylene) -3-amino Examples thereof include propyltrimethoxysilane, N-bis (oxyethylene) -3-aminopropyltriethoxysilane.

  Furthermore, in addition to improving the adhesion between the substrate and the liquid crystal alignment film, the addition of the following phenoplasts and epoxy group-containing compounds for the purpose of preventing the deterioration of electrical characteristics due to the backlight when the liquid crystal display element is constructed An agent may be contained in the polymer composition. Specific phenoplast additives are shown below, but are not limited to this structure.

  Specific epoxy group-containing compounds include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, 1, 6-hexanediol diglycidyl ether, glycerin diglycidyl ether, 2,2-dibromoneopentylglycol diglycidyl ether, 1,3,5,6-tetraglycidyl-2,4-hexanediol, N, N, N ′, N ′,-tetraglycidyl-m-xylenediamine, 1,3-bis (N, N-diglycidylaminomethyl) cyclohexane, N, N, N ′, N ′,-tetraglycidyl-4 4'-diaminodiphenylmethane and the like.

  When using the compound which improves adhesiveness with a board | substrate, it is preferable that the usage-amount is 0.1 mass part-30 mass parts with respect to 100 mass parts of the resin component contained in a polymer composition. More preferably, it is 1 mass part-20 mass parts. If the amount used is less than 0.1 parts by mass, the effect of improving the adhesion cannot be expected, and if it exceeds 30 parts by mass, the orientation of the liquid crystal may deteriorate.

A photosensitizer can also be used as an additive. Colorless and triplet sensitizers are preferred.
As photosensitizers, aromatic nitro compounds, coumarins (7-diethylamino-4-methylcoumarin, 7-hydroxy-4-methylcoumarin), ketocoumarins, carbonyl biscoumarins, aromatic 2-hydroxyketones, and amino substituted Aromatic 2-hydroxyketone (2-hydroxybenzophenone, mono- or di-p- (dimethylamino) -2-hydroxybenzophenone), acetophenone, anthraquinone, xanthone, thioxanthone, benzanthrone, thiazoline (2-benzoylmethylene-3 -Methyl-β-naphthothiazoline, 2- (β-naphthoylmethylene) -3-methylbenzothiazoline, 2- (α-naphthoylmethylene) -3-methylbenzothiazoline, 2- (4-biphenoylmethylene)- 3-methylbenzothia Phosphorus, 2- (β-naphthoylmethylene) -3-methyl-β-naphthothiazoline, 2- (4-biphenoylmethylene) -3-methyl-β-naphthothiazoline, 2- (p-fluorobenzoylmethylene)- 3-methyl-β-naphthothiazoline), oxazoline (2-benzoylmethylene-3-methyl-β-naphthoxazoline, 2- (β-naphthoylmethylene) -3-methylbenzoxazoline, 2- (α-naphthoylmethylene) ) -3-methylbenzoxazoline, 2- (4-biphenoylmethylene) -3-methylbenzoxazoline, 2- (β-naphthoylmethylene) -3-methyl-β-naphthoxazoline, 2- (4-biphenoyl) Methylene) -3-methyl-β-naphthoxazoline, 2- (p-fluorobenzoylmethylene) -3-methyl-β- Ftoxazoline), benzothiazole, nitroaniline (m- or p-nitroaniline, 2,4,6-trinitroaniline) or nitroacenaphthene (5-nitroacenaphthene), (2-[(m-hydroxy-p -Methoxy) styryl] benzothiazole, benzoin alkyl ether, N-alkylated phthalone, acetophenone ketal (2,2-dimethoxyphenylethanone), naphthalene, anthracene (2-naphthalenemethanol, 2-naphthalenecarboxylic acid, 9-anthracenemethanol And 9-anthracenecarboxylic acid), benzopyran, azoindolizine, melocoumarin and the like.
Aromatic 2-hydroxyketone (benzophenone), coumarin, ketocoumarin, carbonyl biscoumarin, acetophenone, anthraquinone, xanthone, thioxanthone, and acetophenone ketal are preferred.

  In the polymer composition, in addition to the above-described ones, a dielectric, a conductive substance, or the like for the purpose of changing the electrical properties such as the dielectric constant and conductivity of the liquid crystal alignment film, as long as the effects of the present invention are not impaired. Furthermore, a crosslinkable compound may be added for the purpose of increasing the hardness and density of the liquid crystal alignment film.

The method for applying the polymer composition described above onto a substrate having a conductive film for driving a lateral electric field is not particularly limited.
In general, the application method is generally performed by screen printing, offset printing, flexographic printing, an inkjet method, or the like. Other coating methods include a dipping method, a roll coater method, a slit coater method, a spinner method (rotary coating method), or a spray method, and these may be used depending on the purpose.

After the polymer composition is applied onto the substrate having the conductive film for driving the transverse electric field, it is 50 to 200 ° C., preferably 50 to 200 ° C. by a heating means such as a hot plate, a thermal circulation oven or an IR (infrared) oven. The solvent can be evaporated at 150 ° C. to obtain a coating film. The drying temperature at this time is preferably lower than the liquid crystal phase expression temperature of the side chain polymer.
If the thickness of the coating film is too thick, it is disadvantageous in terms of power consumption of the liquid crystal display element, and if it is too thin, the reliability of the liquid crystal display element may be lowered. Therefore, it is preferably 5 nm to 300 nm, more preferably 10 nm to 150 nm. It is.
In addition, it is also possible to provide the process of cooling the board | substrate with which the coating film was formed to room temperature after the [I] process and before the following [II] process.

<Process [II]>
In step [II], the coating film obtained in step [I] is irradiated with polarized ultraviolet rays. When irradiating the surface of the coating film with polarized ultraviolet rays, the substrate is irradiated with polarized ultraviolet rays through a polarizing plate from a certain direction. As the ultraviolet rays to be used, ultraviolet rays having a wavelength in the range of 100 nm to 400 nm can be used. Preferably, the optimum wavelength is selected through a filter or the like depending on the type of coating film to be used. For example, ultraviolet rays having a wavelength in the range of 290 nm to 400 nm can be selected and used so that the photocrosslinking reaction can be selectively induced. As the ultraviolet light, for example, light emitted from a high-pressure mercury lamp can be used.

  The irradiation amount of polarized ultraviolet rays depends on the coating film used. The amount of irradiation is polarized ultraviolet light that realizes the maximum value of ΔA (hereinafter also referred to as ΔAmax), which is the difference between the ultraviolet light absorbance in a direction parallel to the polarization direction of polarized ultraviolet light and the ultraviolet light absorbance in a direction perpendicular to the polarization direction of the polarized ultraviolet light. The amount is preferably in the range of 1% to 70%, more preferably in the range of 1% to 50%.

<Step [III]>
In step [III], the ultraviolet-irradiated coating film polarized in step [II] is heated. An orientation control ability can be imparted to the coating film by heating.
For heating, a heating means such as a hot plate, a heat circulation type oven, or an IR (infrared) type oven can be used. The heating temperature can be determined in consideration of the temperature at which the liquid crystallinity of the coating film used is developed.

The heating temperature is preferably within the temperature range of the temperature at which the side chain polymer exhibits liquid crystallinity (hereinafter referred to as liquid crystal expression temperature). In the case of a thin film surface such as a coating film, the liquid crystal expression temperature on the coating film surface is expected to be lower than the liquid crystal expression temperature when a photosensitive side chain polymer that can exhibit liquid crystallinity is observed in bulk. The Therefore, the heating temperature is more preferably within the temperature range of the liquid crystal expression temperature on the coating film surface. That is, the temperature range of the heating temperature after irradiation with polarized ultraviolet rays is 10 ° C. lower than the lower limit of the temperature range of the liquid crystal expression temperature of the side chain polymer used, and 10 ° C. lower than the upper limit of the liquid crystal temperature range. It is preferable that it is the temperature of the range which makes an upper limit. If the heating temperature is lower than the above temperature range, the anisotropic amplification effect due to heat in the coating film tends to be insufficient, and if the heating temperature is too higher than the above temperature range, the state of the coating film Tends to be close to an isotropic liquid state (isotropic phase), and in this case, self-organization may make it difficult to reorient in one direction.
The liquid crystal expression temperature is not less than the glass transition temperature (Tg) at which the side chain polymer or coating film surface undergoes a phase transition from the solid phase to the liquid crystal phase, and from the liquid crystal phase to the isotropic phase (isotropic phase). It means a temperature below the isotropic phase transition temperature (Tiso) that causes a phase transition.

  The thickness of the coating film formed after heating is preferably 5 nm to 300 nm, more preferably 50 nm to 150 nm, for the same reason described in the step [I].

  By having the above steps, the production method of the present invention can realize highly efficient introduction of anisotropy into the coating film. And a board | substrate with a liquid crystal aligning film can be manufactured highly efficiently.

<Process [IV]>
The step [IV] is performed in the same manner as the above [I ′] to [III ′] in the same manner as the substrate (first substrate) obtained in [III] and having a liquid crystal alignment film on the conductive film for driving a horizontal electric field. The obtained liquid crystal alignment film-attached substrate (second substrate) having no conductive film is placed oppositely so that both liquid crystal alignment films face each other through liquid crystal, and a liquid crystal cell is formed by a known method. This is a step of manufacturing a lateral electric field drive type liquid crystal display element. The steps [I ′] to [III ′] are the same as the steps [I] except that a substrate having no lateral electric field driving conductive film is used instead of the substrate having the lateral electric field driving conductive film. It can carry out similarly to process [I]-[III]. Since the difference between the steps [I] to [III] and the steps [I ′] to [III ′] is only the presence or absence of the conductive film, the description of the steps [I ′] to [III ′] is omitted. To do.

  To give an example of the production of a liquid crystal cell or a liquid crystal display element, the first and second substrates described above are prepared, spacers are dispersed on the liquid crystal alignment film of one substrate, and the liquid crystal alignment film surface is on the inside. In this way, the other substrate is bonded and the liquid crystal is injected under reduced pressure, or the liquid crystal is dropped on the liquid crystal alignment film surface on which the spacers are dispersed, and then the substrate is bonded and sealed. , Etc. can be illustrated. At this time, it is preferable to use a substrate having an electrode having a structure like a comb for driving a horizontal electric field as the substrate on one side. The spacer diameter at this time is preferably 1 μm to 30 μm, more preferably 2 μm to 10 μm. This spacer diameter determines the distance between the pair of substrates that sandwich the liquid crystal layer, that is, the thickness of the liquid crystal layer.

The manufacturing method of the board | substrate with a coating film of this invention irradiates the polarized ultraviolet-ray, after apply | coating a polymer composition on a board | substrate and forming a coating film. Next, by heating, high-efficiency anisotropy is introduced into the side chain polymer film, and a substrate with a liquid crystal alignment film having a liquid crystal alignment control ability is manufactured.
The coating film used in the present invention realizes the introduction of highly efficient anisotropy into the coating film by utilizing the principle of molecular reorientation induced by the side chain photoreaction and liquid crystallinity. . In the production method of the present invention, in the case of a structure having a photocrosslinkable group as a photoreactive group in the side chain polymer, after forming a coating film on the substrate using the side chain polymer, polarized ultraviolet rays are formed. After irradiation and then heating, a liquid crystal display element is formed.

  Hereinafter, an embodiment using a side chain type polymer having a structure having a photocrosslinkable group as a photoreactive group is the first embodiment, a structure having a photofleece rearrangement group or a group causing isomerization as a photoreactive group An embodiment using the side chain type polymer will be referred to as a second embodiment.

  FIG. 1 schematically shows an anisotropic introduction process in a method for producing a liquid crystal alignment film using a side chain polymer having a structure having a photocrosslinkable group as a photoreactive group in the first embodiment of the present invention. It is a figure of one example demonstrated to. FIG. 1 (a) is a diagram schematically showing the state of the side chain polymer film before irradiation with polarized light, and FIG. 1 (b) is a schematic diagram showing the state of the side chain polymer film after irradiation with polarized light. FIG. 1 (c) is a diagram schematically showing the state of the side-chain polymer film after heating, and particularly when the introduced anisotropy is small, that is, the first aspect of the present invention. In 1 form, it is a schematic diagram in case the ultraviolet irradiation amount of a [II] process exists in the range of 1%-15% of the ultraviolet irradiation amount which makes (DELTA) A the maximum.

  FIG. 2 is a schematic illustration of anisotropy introduction treatment in a method for producing a liquid crystal alignment film using a side chain polymer having a structure having a photocrosslinkable group as a photoreactive group in the first embodiment of the present invention. It is a figure of one example demonstrated to. FIG. 2A is a diagram schematically showing the state of the side chain polymer film before irradiation with polarized light, and FIG. 2B is a schematic diagram showing the state of the side chain polymer film after irradiation with polarized light. FIG. 2 (c) is a diagram schematically showing the state of the side-chain polymer film after heating, and particularly when the introduced anisotropy is large, that is, the first aspect of the present invention. In 1 form, it is a schematic diagram in case the ultraviolet irradiation amount of a [II] process exists in the range of 15%-70% of the ultraviolet irradiation amount which makes (DELTA) A the maximum.

  FIG. 3 shows a side chain polymer having a structure having a photo-isomerizable group as a photoreactive group or a photo-Fleece rearrangement group represented by the above formula (18) in the second embodiment of the present invention. It is a figure of one example which illustrates typically the introduction process of anisotropy in the manufacturing method of the used liquid crystal aligning film. FIG. 3A is a diagram schematically showing the state of the side chain polymer film before polarized light irradiation, and FIG. 3B is a schematic diagram of the state of the side chain polymer film after polarized light irradiation. FIG. 3 (c) is a diagram schematically showing the state of the side-chain polymer film after heating, and particularly when the introduced anisotropy is small, that is, the first aspect of the present invention. In 2 aspect, it is a schematic diagram in case the ultraviolet irradiation amount of a [II] process exists in the range of 1%-70% of the ultraviolet irradiation amount which makes (DELTA) A the maximum.

  FIG. 4 shows the production of a liquid crystal alignment film using a side chain polymer having a structure having a photo-Fleece rearrangement group represented by the above formula (19) as a photoreactive group in the second embodiment of the present invention. It is a figure of one example which illustrates typically the introduction processing of anisotropy in a method. FIG. 4A is a diagram schematically showing the state of the side chain polymer film before irradiation with polarized light, and FIG. 4B is a schematic diagram of the state of the side chain polymer film after irradiation with polarized light. FIG. 4 (c) is a diagram schematically showing the state of the side-chain polymer film after heating. In particular, when the introduced anisotropy is large, that is, In 2 aspect, it is a schematic diagram in case the ultraviolet irradiation amount of a [II] process exists in the range of 1%-70% of the ultraviolet irradiation amount which makes (DELTA) A the maximum.

  In the first embodiment of the present invention, in the treatment for introducing anisotropy into the coating film, the ultraviolet irradiation amount in the step [II] is in the range of 1% to 15% of the ultraviolet irradiation amount that maximizes ΔA. In the case, first, the coating film 1 is formed on the substrate. As shown to Fig.1 (a), in the coating film 1 formed on the board | substrate, it has a structure where the side chain 2 arranges at random. According to the random arrangement of the side chain 2 of the coating film 1, the mesogenic component and the photosensitive group of the side chain 2 are also randomly oriented, and the coating film 1 is isotropic.

  In the first embodiment of the present invention, in the treatment for introducing anisotropy into the coating film, the ultraviolet irradiation amount in the step [II] is in the range of 15% to 70% of the ultraviolet irradiation amount that maximizes ΔA. In the case, first, the coating film 3 is formed on the substrate. As shown in FIG. 2A, the coating film 3 formed on the substrate has a structure in which the side chains 4 are randomly arranged. According to the random arrangement of the side chains 4 of the coating film 3, the mesogenic components and the photosensitive groups of the side chains 4 are also randomly oriented, and the coating film 2 is isotropic.

  In the second embodiment of the present invention, a side chain type having a structure having a photo-isomerizable group or a photo-Fleece rearrangement group represented by the above formula (18) in the treatment for introducing anisotropy into the coating film. In the case of using a liquid crystal alignment film using a polymer, when the ultraviolet irradiation amount in the step [II] is within the range of 1% to 70% of the ultraviolet irradiation amount that maximizes ΔA, first, on the substrate The coating film 5 is formed. As shown in FIG. 3A, the coating film 5 formed on the substrate has a structure in which the side chains 6 are randomly arranged. According to the random arrangement of the side chain 6 of the coating film 5, the mesogenic component and the photosensitive group of the side chain 6 are also randomly oriented, and the side chain type polymer film 5 is isotropic.

  In the second embodiment of the present invention, liquid crystal alignment using a side chain type polymer having a structure having a light Fleece rearrangement group represented by the above formula (19) in the treatment for introducing anisotropy into the coating film In the case of using a film, when the ultraviolet irradiation amount in the step [II] is in the range of 1% to 70% of the ultraviolet irradiation amount that maximizes ΔA, first, the coating film 7 is formed on the substrate. . As shown in FIG. 4A, the coating film 7 formed on the substrate has a structure in which the side chains 8 are arranged at random. According to the random arrangement of the side chains 8 of the coating film 7, the mesogenic components and the photosensitive groups of the side chains 8 are also randomly oriented, and the coating film 7 is isotropic.

  In the first embodiment of the present invention, when the ultraviolet irradiation amount in the step [II] is within the range of 1% to 15% of the ultraviolet irradiation amount that maximizes ΔA, the isotropic coating film 1 is formed. On the other hand, polarized ultraviolet rays are irradiated. Then, as shown in FIG. 1B, the photosensitive group of the side chain 2a having the photosensitive group among the side chains 2 arranged in a direction parallel to the polarization direction of the ultraviolet rays is preferentially subjected to dimerization reaction or the like. Causes a photoreaction. As a result, the density of the side chain 2a that has undergone photoreaction becomes slightly higher in the polarization direction of the irradiated ultraviolet light, and as a result, very small anisotropy is imparted to the coating film 1.

  In the first embodiment, when the ultraviolet irradiation amount in the step [II] is in the range of 15% to 70% of the ultraviolet irradiation amount that maximizes ΔA, the isotropic coating film 3 is formed. On the other hand, polarized ultraviolet rays are irradiated. Then, as shown in FIG. 2B, the photosensitive group of the side chain 4a having the photosensitive group among the side chains 4 arranged in a direction parallel to the polarization direction of the ultraviolet rays is preferentially subjected to dimerization reaction or the like. Causes a photoreaction. As a result, the density of the side chain 4a that has undergone photoreaction increases in the polarization direction of the irradiated ultraviolet light, and as a result, a small anisotropy is imparted to the coating film 3.

  In the second embodiment of the present invention, using a liquid crystal alignment film using a photoisomerizable group or a side chain polymer having a structure having a photo-Fleece rearrangement group represented by the above formula (18), [II] When the ultraviolet irradiation amount in the step is in the range of 1% to 15% of the ultraviolet irradiation amount that maximizes ΔA, the isotropic coating film 5 is irradiated with polarized ultraviolet rays. Then, as shown in FIG. 3 (b), the photosensitive group of the side chain 6a having the photosensitive group among the side chains 6 arranged in a direction parallel to the polarization direction of the ultraviolet rays is preferentially subjected to light fleece rearrangement or the like. Causes a photoreaction. As a result, the density of the side chain 6a subjected to photoreaction becomes slightly higher in the polarization direction of the irradiated ultraviolet rays, and as a result, very small anisotropy is imparted to the coating film 5.

  In the second embodiment of the present invention, the amount of ultraviolet irradiation in the step [II] is obtained using a coating film using a side chain polymer having a structure having a photo-Fleece rearrangement group represented by the above formula (19). Is within the range of 1% to 70% of the amount of UV irradiation that maximizes ΔA, the isotropic coating film 7 is irradiated with polarized UV light. Then, as shown in FIG. 4 (b), the photosensitive group of the side chain 8a having the photosensitive group among the side chains 8 arranged in a direction parallel to the polarization direction of the ultraviolet rays is preferentially subjected to light fleece rearrangement or the like. Causes a photoreaction. As a result, the density of the side chain 8a that has undergone photoreaction increases in the polarization direction of the irradiated ultraviolet light, and as a result, small anisotropy is imparted to the coating film 7.

  Next, in the first embodiment, in the case where the ultraviolet irradiation amount in the step [II] is within the range of 1% to 15% of the ultraviolet irradiation amount that maximizes ΔA, the coating film 1 after polarized light irradiation Is heated to a liquid crystal state. Then, as shown in FIG.1 (c), in the coating film 1, the amount of the generated crosslinking reaction differs between the direction parallel to the polarization direction of the irradiated ultraviolet rays and the direction perpendicular thereto. In this case, since the amount of the crosslinking reaction generated in the direction parallel to the polarization direction of the irradiated ultraviolet ray is very small, this crosslinking reaction site functions as a plasticizer. Therefore, the liquid crystallinity in the direction perpendicular to the polarization direction of the irradiated ultraviolet light is higher than the liquid crystallinity in the parallel direction, and the side chain 2 containing the mesogenic component is reoriented by self-organizing in the direction parallel to the polarization direction of the irradiated ultraviolet light. As a result, the very small anisotropy of the coating film 1 induced by the photocrosslinking reaction is amplified by heat, and a larger anisotropy is imparted to the coating film 1.

  Similarly, in the first embodiment, when the ultraviolet irradiation amount in the step [II] is within the range of 15% to 70% of the ultraviolet irradiation amount that maximizes ΔA, the coating film after polarized light irradiation 3 is heated to a liquid crystal state. Then, as shown in FIG. 2C, in the side chain type polymer film 3, the amount of the generated crosslinking reaction differs between the direction parallel to the polarization direction of the irradiated ultraviolet rays and the direction perpendicular thereto. Therefore, the side chain 4 containing the mesogenic component is reoriented by self-organizing in a direction parallel to the polarization direction of the irradiated ultraviolet light. As a result, the small anisotropy of the coating film 3 induced by the photocrosslinking reaction is amplified by heat, and a larger anisotropy is imparted to the coating film 3.

  Similarly, in the second embodiment, a coating film using a side-chain polymer having a structure having a photo-isomerizable group or a photo-Fleece rearrangement group represented by the above formula (18) is used. Then, when the ultraviolet irradiation amount in the step [II] is in the range of 1% to 70% of the ultraviolet irradiation amount that maximizes ΔA, the coating film 5 after the polarized light irradiation is heated to be in a liquid crystal state. Then, as shown in FIG.3 (c), in the coating film 5, the quantity of the produced | generated light fleece rearrangement reaction differs between the direction parallel to the polarization direction of irradiation ultraviolet rays, and a perpendicular | vertical direction. In this case, since the liquid crystal alignment force of the light fleece rearrangement generated in the direction perpendicular to the polarization direction of the irradiated ultraviolet light is stronger than the liquid crystal alignment force of the side chain before the reaction, it is self-organized in the direction perpendicular to the polarization direction of the irradiated ultraviolet light. The side chain 6 containing the mesogenic component is reoriented. As a result, the very small anisotropy of the coating film 5 induced by the photofleece rearrangement reaction is amplified by heat, and a larger anisotropy is imparted to the coating film 5.

  Similarly, in the second embodiment, a coating film using a side chain type polymer having a structure having a photofleece rearrangement group represented by the above formula (19) is used. When the ultraviolet irradiation amount is in the range of 1% to 70% of the ultraviolet irradiation amount that maximizes ΔA, the coating film 7 after irradiation with polarized light is heated to a liquid crystal state. Then, as shown in FIG. 4 (c), in the side chain polymer film 7, the amount of the generated light fleece rearrangement reaction differs between the direction parallel to the polarization direction of the irradiated ultraviolet light and the direction perpendicular thereto. . Since the anchoring force of the optical fleece rearrangement 8 (a) is stronger than that of the side chain 8 before the rearrangement, when a certain amount or more of the optical fleece rearrangement occurs, it is self-assembled in a direction parallel to the polarization direction of the irradiated ultraviolet light. The side chain 8 containing the mesogenic component is reoriented. As a result, the small anisotropy of the coating film 7 induced by the photofleece rearrangement reaction is amplified by heat, and a larger anisotropy is imparted to the coating film 7.

  Therefore, the coating film used in the method of the present invention is a liquid crystal alignment film having anisotropy introduced with high efficiency and excellent alignment control ability by sequentially performing irradiation of polarized ultraviolet rays on the coating film and heat treatment. can do.

  And in the coating film used for the method of this invention, the irradiation amount of the polarized ultraviolet-ray to a coating film, and the heating temperature in heat processing are optimized. Thereby, introduction of anisotropy into the coating film with high efficiency can be realized.

  The optimum irradiation amount of polarized ultraviolet rays for introducing highly efficient anisotropy into the coating film used in the present invention is such that the photosensitive group undergoes photocrosslinking reaction, photoisomerization reaction, or photofries rearrangement reaction in the coating film. Corresponds to the irradiation amount of polarized ultraviolet rays to optimize the amount. As a result of irradiating the coating film used in the present invention with polarized ultraviolet rays, if the photo-crosslinking reaction, photoisomerization reaction, or photo-fleece rearrangement reaction has few photosensitive groups in the side chain, the amount of photoreaction will not be sufficient. . In that case, sufficient self-organization does not proceed even after heating. On the other hand, as a result of irradiating polarized ultraviolet rays to the structure having a photocrosslinkable group in the coating film used in the present invention, the crosslinking reaction between the side chains is caused when the photosensitive group of the side chain undergoing the crosslinking reaction becomes excessive. Too much progress. In that case, the resulting film may become rigid and hinder the progress of self-assembly by subsequent heating. In addition, when the coating film used in the present invention is irradiated with polarized ultraviolet rays to the structure having the light Fleece rearrangement group, if the photosensitive group of the side chain that undergoes the light Fleece rearrangement reaction becomes excessive, the liquid crystallinity of the coating film Will drop too much. In that case, the liquid crystallinity of the obtained film is also lowered, which may hinder the progress of self-assembly by subsequent heating. Furthermore, when irradiating polarized ultraviolet light to a structure having a photo-fleece rearrangement group, if the amount of ultraviolet light irradiation is too large, the side-chain polymer is photodegraded, preventing the subsequent self-organization by heating. It may become.

  Therefore, in the coating film used in the present invention, the optimum amount of the photopolymerization reaction, photoisomerization reaction, or photofleece rearrangement reaction of the side chain photosensitive group by irradiation with polarized ultraviolet rays is the side chain polymer film. It is preferable to make it 0.1 mol%-40 mol% of the photosensitive group which has, and it is more preferable to set it as 0.1 mol%-20 mol%. By making the amount of the photo-reactive side chain photosensitive group within such a range, the self-organization in the subsequent heat treatment proceeds efficiently, and the formation of highly efficient anisotropy in the film is possible. Become.

  In the coating film used in the method of the present invention, by optimizing the irradiation amount of polarized ultraviolet rays, photocrosslinking reaction or photoisomerization reaction of photosensitive groups or photofleece rearrangement reaction in the side chain of the side chain polymer film Optimize the amount of. Then, in combination with the subsequent heat treatment, highly efficient introduction of anisotropy into the coating film used in the present invention is realized. In that case, a suitable amount of polarized ultraviolet rays can be determined based on the evaluation of ultraviolet absorption of the coating film used in the present invention.

  That is, the ultraviolet absorption in the direction parallel to the polarization direction of polarized ultraviolet light and the ultraviolet absorption in the vertical direction after irradiation with polarized ultraviolet light are measured for the coating film used in the present invention. From the measurement result of ultraviolet absorption, ΔA, which is the difference between the ultraviolet absorbance in the direction parallel to the polarization direction of polarized ultraviolet rays and the ultraviolet absorbance in the direction perpendicular to the polarization direction of the polarized ultraviolet rays, is evaluated. Then, the maximum value of ΔA (ΔAmax) realized in the coating film used in the present invention and the irradiation amount of polarized ultraviolet light that realizes it are obtained. In the production method of the present invention, a preferable amount of polarized ultraviolet rays to be irradiated in the production of the liquid crystal alignment film can be determined on the basis of the amount of polarized ultraviolet rays to realize this ΔAmax.

  In the production method of the present invention, the irradiation amount of polarized ultraviolet rays on the coating film used in the present invention is preferably in the range of 1% to 70% of the amount of polarized ultraviolet rays realizing ΔAmax. More preferably, it is within the range of 50%. In the coating film used in the present invention, the irradiation amount of polarized ultraviolet rays within the range of 1% to 50% of the amount of polarized ultraviolet rays realizing ΔAmax is 0. 0% of the entire photosensitive group of the side chain polymer film. 1 mol% to 20 mol% corresponds to the amount of polarized ultraviolet light that undergoes a photocrosslinking reaction.

  From the above, in the production method of the present invention, in order to achieve highly efficient anisotropy introduction into the coating film, a suitable heating temperature as described above is set based on the liquid crystal temperature range of the side chain polymer. It is good to decide. Therefore, for example, when the liquid crystal temperature range of the side chain polymer used in the present invention is 100 ° C. to 200 ° C., the heating temperature after irradiation with polarized ultraviolet light is desirably 90 ° C. to 190 ° C. By doing so, greater anisotropy is imparted to the coating film used in the present invention.

  By doing so, the liquid crystal display element provided by the present invention exhibits high reliability against external stresses such as light and heat.

  As described above, the lateral electric field drive type liquid crystal display element substrate manufactured by the method of the present invention or the lateral electric field drive type liquid crystal display element having the substrate has excellent reliability, large screen and high definition. It can be suitably used for LCD TVs.

  EXAMPLES Hereinafter, although this invention is demonstrated using an Example, this invention is not limited to this Example.

  The methacrylic monomers MA1 and MA2 used in the examples, GMA, HBAGE, G1 and the additive T1 are shown below as monomers having an epoxy side chain.

MA1 and M2 were synthesized as follows. That is, MA1 was synthesized by a synthesis method described in a patent document (WO2011-084546). MA2 was synthesized by a synthesis method described in a patent document (Japanese Patent Laid-Open No. 9-118717).
G1 was synthesized by the synthesis method described in Synthesis Example 1 below.
GMA (glycidyl methacrylate), HBAGE (hydroxybutyl acrylate glycidyl ether), and additive T1 (3-aminomethylpyridine) were commercially available.

<Synthesis Example 1>
Synthesis of specific glycidyl compound (G1)

Carboxylic acid derivative (MA2) (18.4 g, 60 mmol) in THF (tetrahydrofuran) solution (184 g) was mixed with (COCl) ₂ (oxalyl chloride) (11.4 g, 90 mmol) and DMF (dimethylformamide). The solution was added dropwise and reacted at room temperature for 2 hours. The solid obtained by concentrating this solution was dissolved in THF (350 g). This solution was added dropwise to a THF solution (88 g) of glycidol (8.89 g, 120 mmol) and triethylamine (13.4 g, 132 mmol) over 1 hour and allowed to react for 18 hours. Thereafter, ethyl acetate (500 g) was added, and the organic phase was washed three times with water (300 g) and dried over magnesium sulfate. After removing magnesium sulfate by filtration, the concentrate was concentrated to obtain a crude product. The obtained crude product was subjected to silica gel chromatography using ethyl acetate and hexane to obtain G1 as a white solid. (Yield: 14.9 g, 69%).

Glycidyl derivative (G1):
¹ H-NMR (CDCl ₃ , δ ppm): 8.01 (d, 2H), 7.01 (d, 2H), 6.01 (s, 1H), 5.56 (s, 1H), 4.65 -4.61 (m, 1H), 4.18-4.12 (m, 3H), 4.02 (t, 2H), 3.36-3.32 (m, 1H), 2.91-2 .89 (m, 1H), 2.74-2.72 (m, 1H), 1.95-1.94 (m, 3H), 1.86-1.79 (m, 2H), 1.76 -1.69 (m, 2H), 1.57-1.44 (m, 4H).

<Synthesis Example 2>
Synthesis of specific oxetane compound (G2)

  Carboxylic acid derivative (M2) (21.4 g, 70 mmol), dimethylaminopyridine (0.85 g, 7 mmol), 1-ethyl-3- (3-dimethylaminopropyl) carbodiimide hydrochloride (14, 8 g, 77 mmol) in THF To the (tetrahydrofuran) solution (107 g), 3-ethyl-3-oxetanemethanol (8.58 g, 73.5 mmol) was added and reacted at room temperature for 18 hours. Then, the precipitated insoluble matter was removed by filtration, ethyl acetate (500 g) was added, washed three times with water (200 g), and dried over magnesium sulfate. Magnesium sulfate was removed by filtration and then concentrated to obtain G2 as a colorless liquid (yield 27.3 g, yield 96%).

Oxetane compound (G2):
¹ H-NMR (CDCl ₃ , δ ppm): 7.97 (d, 2H), 6.91 (d, 2H), 6.10 (s, 1H), 5.55 (s, 1H), 4.60 (D, 2H), 4.48 (d, 2H), 4.43 (s, 2H), 4.16 (t, 2H), 4,02 (t, 2H), 1.94 (s, 3H) 1.8-1.79 (m, 4H), 1.76-1.69 (m, 2H), 1.57-1.43 (m, 4H), 0.97 (t, 3H).

<Synthesis Example 3>
Synthesis of Specific Oxetane Compound (G3) The following oxetane compound (G3) was synthesized in the same manner as in the above synthesis example.

Oxetane compound (G3):
¹ H-NMR (CDCl ₃ , δ ppm): 7.98 (d, 2H), 6.90 (d, 2H), 6.10 (s, 1H), 5.55 (s, 1H), 4.45 (D, 2H), 4.39 (d, 2H), 4.31 (t, 2H), 4.16 (t, 2H), 4,01 (t, 2H), 4.01 (t, 2H) , 3.54-3.50 (m, 4H), 1.87-1.66 (m, 10H) 1.56-1.44 (m, 4H), 0.89 (t, 3H).

In addition, the abbreviations of the reagents used in this example are shown below.
(Organic solvent)
THF: tetrahydrofuran.
NMP: N-methyl-2-pyrrolidone.
BC: Butyl cellosolve.
(Polymerization initiator)
AIBN: 2,2′-azobisisobutyronitrile.

<Polymer synthesis example 1>
MA1 (9.67 g, 29.1 mmol) and GMA (0.13 g, 0.9 mmol) were dissolved in THF (56.3 g), deaerated with a diaphragm pump, and then AIBN (0.15 g, 3 mmol). ) And deaerated again. Thereafter, the mixture was reacted at 60 ° C. for 12 hours to obtain a polymer solution of methacrylate. This polymer solution was added dropwise to diethyl ether (1000 ml), and the resulting precipitate was filtered. This precipitate was washed with diethyl ether and dried under reduced pressure in an oven at 40 ° C. to obtain methacrylate polymer powder P1.

<Polymer synthesis examples 2 to 6>
The composition shown in Table 1 was synthesized using the same method as in Polymer Synthesis Example 1.

<Example 1>
NMP (54.0 g) was added to the methacrylate polymer powder P1 (6.0 g) obtained in Polymer Synthesis 1, and dissolved by stirring for 5 hours at room temperature. Polymer solution A1 was obtained by adding BC (40.0g) to this solution and stirring. This polymer solution was used as a liquid crystal aligning agent for forming a liquid crystal alignment film as it was.

<Examples 2 to 12>
The composition shown in Table 2 was adjusted using the same method as in Example 1, and liquid crystal aligning agents A2 to A12 of Examples 2 to 12 were obtained.

<Control polymer synthesis example 1>
MA1 (9.97 g, 30 mmol) was dissolved in THF (57.5 g) and degassed with a diaphragm pump, and then AIBN (0.15 g, 3 mmol) was added to degas again. Thereafter, the mixture was reacted at 60 ° C. for 12 hours to obtain a polymer solution of methacrylate. This polymer solution was added dropwise to diethyl ether (1000 ml), and the resulting precipitate was filtered. This precipitate was washed with diethyl ether and dried under reduced pressure in an oven at 40 ° C. to obtain methacrylate polymer powder CP1.

<Control polymer synthesis example 2>
Using a method similar to Control 1 with the composition of MA1 (5.9 g, 18 mmol), MA2 (3.7 g, 12 mmol), THF (55.5 g), AIBN (0.15 g, 3 mmol), methacrylate polymer powder CP2 Got.

<Controls 1 and 2>
Control 1 liquid crystal aligning agent B1 was obtained in the same manner as in Example 1 using CP1. Similarly, Control 2 liquid crystal aligning agent B2 was obtained using CP2.

<< Preparation of liquid crystal cell >>
Using the liquid crystal aligning agent A1 obtained in Example 1, a liquid crystal cell was prepared according to the procedure shown below. The substrate used was a glass substrate having a size of 30 mm × 40 mm and a thickness of 0.7 mm, on which comb-like pixel electrodes formed by patterning an ITO film were arranged.

  The pixel electrode had a comb-like shape formed by arranging a plurality of dog-shaped electrode elements having a bent central portion. The width of each electrode element in the short direction was 10 μm, and the distance between the electrode elements was 20 μm. Since the pixel electrode forming each pixel is formed by arranging a plurality of bent-shaped electrode elements in the central portion, the shape of each pixel is not rectangular, but in the central portion like the electrode elements. It has a shape that bends and resembles a bold-faced koji.

  Each pixel was divided vertically with a central bent portion as a boundary, and had a first region on the upper side of the bent portion and a second region on the lower side. When the first region and the second region of each pixel are compared, the formation directions of the electrode elements of the pixel electrodes constituting them are different. That is, when the alignment processing direction of the liquid crystal alignment film described later is used as a reference, the electrode element of the pixel electrode is formed to form an angle of + 15 ° (clockwise) in the first region of the pixel, and in the second region of the pixel. The electrode elements of the pixel electrode are formed so as to form an angle of −15 ° (clockwise). That is, in the first region and the second region of each pixel, the directions of the rotation operation (in-plane switching) of the liquid crystal induced by the voltage application between the pixel electrode and the counter electrode are mutually in the substrate plane. It was configured to be in the opposite direction.

The liquid crystal aligning agent A1 obtained in Example 1 was spin-coated on the prepared substrate with electrodes. Subsequently, it dried for 90 second with a 70 degreeC hotplate, and formed the liquid crystal aligning film with a film thickness of 100 nm. Next, the coating film surface was irradiated with 20 mJ / cm ^{2 of} 313 nm ultraviolet rays via a polarizing plate and then heated on a hot plate at 150 ° C. for 10 minutes to obtain a substrate with a liquid crystal alignment film. Further, a coating film was similarly formed on a glass substrate having a columnar spacer having a height of 4 μm on which no electrode was formed as a counter substrate, and an orientation treatment was performed. A sealant (XN-1500T manufactured by Kyoritsu Chemical Co., Ltd.) was printed on the liquid crystal alignment film of one substrate. Next, the other substrate was bonded so that the liquid crystal alignment film faces each other and the alignment direction was 0 °, and then the sealing agent was thermally cured to produce an empty cell. A liquid crystal cell having a configuration of an IPS (In-Plane Switching) mode liquid crystal display element is injected into the empty cell by a reduced pressure injection method by injecting liquid crystal MLC-2041 (Merck Co., Ltd.), sealing the injection port. Obtained.

  A liquid crystal cell was similarly prepared using the liquid crystal aligning agents A2 to A12 obtained in Examples 2 to 12 and the liquid crystal aligning agents B1 and B2 obtained in Controls 1 and 2, respectively.

<< Evaluation of voltage holding ratio (VHR) >>
Using the liquid crystal cell produced above, a voltage of 5 V was applied for 60 μs at a temperature of 70 ° C., the voltage after 16.67 ms was measured, and how much the voltage could be held was calculated as the voltage holding ratio (VHR1). . Further, a 16 Vpp AC voltage was applied to the measured cell at a frequency of 30 Hz in a constant temperature environment of 70 ° C. for 168 hours. Thereafter, the pixel electrode and the counter electrode of the liquid crystal cell were short-circuited and left as it was at room temperature for 1 hour. The obtained cell was measured under the same conditions as VHR1, and how much voltage could be held was calculated as voltage holding ratio (VHR2). The voltage holding ratio was measured using a voltage holding ratio measuring device VHR-1 manufactured by Toyo Technica.

  The results of VHR are shown in Table 3 together with the compositions of the examples and the control liquid crystal aligning agent.

  From Table 3, it can be seen that in Examples 1 to 12, VHR1 is improved by copolymerizing a monomer having an epoxy group as compared with Controls 1 and 2 which are not copolymerized. Moreover, it turns out that the result of VHR2 is favorable by adding additive T1 further in Examples 5-8, 11 and 12.

<Afterimage evaluation>
The liquid crystal cell for IPS mode prepared in Examples 1 to 8 is installed between two polarizing plates arranged so that the polarization axes are orthogonal to each other, and the backlight is turned on with no voltage applied, and the transmitted light is transmitted. The arrangement angle of the liquid crystal cell was adjusted so that the luminance of the liquid crystal cell was minimized. Then, the rotation angle when the liquid crystal cell was rotated from the angle at which the second region of the pixel was darkest to the angle at which the first region was darkest was calculated as the initial orientation azimuth.
Next, an alternating voltage of 16 V _PP was applied in a 60 ° C. oven at a frequency of 30 Hz for 168 hours. Thereafter, the pixel electrode and the counter electrode of the liquid crystal cell were short-circuited and left as it was at room temperature for 1 hour. After standing, the orientation azimuth was measured in the same manner, and the difference in orientation azimuth before and after AC driving was calculated as an angle Δ (deg.).
The same measurement was performed in other examples.

As a result, in all the examples, the angle Δ was 0.1 or less.
The long-chain polymer film that exhibits liquid crystallinity is irradiated with ultraviolet rays and then heated in the liquid crystal expression temperature range, so that the liquid crystal alignment ability is imparted to the entire polymer by self-organization. Even after AC driving, the alignment azimuth was hardly observed.

FIG.
1 Side chain polymer membrane 2, 2a Side chain Fig. 2
3 Side chain polymer membrane 4, 4a Side chain Fig. 3
5 Side chain polymer membrane 6, 6a Side chain Fig. 4
7 Side chain polymer membrane 8, 8a Side chain

Claims (18)

A photosensitive side-chain polymer that exhibits liquid crystallinity in a predetermined temperature range, which has the following formula (0)

[Wherein, A and B are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O. -Represents-or -O-CO-CH = CH-;
S is an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced by a halogen group;
T is a single bond or an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced with a halogen group;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
P and Q are each independently selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. Provided that when X is —CH═CH—CO—O— or —O—CO—CH═CH—, P or Q on the side to which —CH═CH— is bonded is an aromatic ring; When the number of P is 2 or more, the Ps may be the same or different, and when the number of Q is 2 or more, the Qs may be the same or different;
l1 is 0 or 1;
l2 is an integer from 0 to 2;
when l1 and l2 are both 0, A represents a single bond when T is a single bond;
when l1 is 1, B represents a single bond when T is a single bond;
G represents the following formulas (G-1), (G-2), (G-3) and (G-4).

(Wherein the dashed line represents a bond, R ⁵⁰ represents a group selected from hydrogen atom, a halogen atom, an alkyl group having 1 to 3 carbon atoms, a phenyl group, if R ⁵⁰ is more mutually the same or different T is an integer of 1 to 7, J represents O, S, NH or NR ⁵¹ , and R ⁵¹ represents a group selected from an alkyl group having 1 to 3 carbon atoms and a phenyl group)
Is a group selected from
A side chain polymer further having a side chain represented by the formula:   The side chain polymer according to claim 1, which has a photosensitive side chain that undergoes photocrosslinking, photoisomerization, or photofleece transition. Following formula (1)-(6)

(In the formula, A, B and D are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO; Represents —O— or —O—CO—CH═CH—;
S is an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced by a halogen group;
T is a single bond or an alkylene group having 1 to 12 carbon atoms, and a hydrogen atom bonded thereto may be replaced with a halogen group;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
Y ₂ is a group selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof, The hydrogen atoms bonded to each independently represent —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or 1 to 5 carbon atoms. May be substituted with an alkyloxy group of
R represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, or the same definition as Y ₁ ;
Cou represents coumarin-6-yl group or a coumarin-7-yl group, _-NO 2 are each a hydrogen atom bonded to them _{independently, -CN, -CH = C (CN} ) 2, -CH = CH- May be substituted with CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms;
one of q1 and q2 is 1 and the other is 0;
q3 is 0 or 1;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
P and Q are each independently selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. Provided that when X is —CH═CH—CO—O— or —O—CO—CH═CH—, P or Q on the side to which —CH═CH— is bonded is an aromatic ring; When the number of P is 2 or more, the Ps may be the same or different, and when the number of Q is 2 or more, the Qs may be the same or different;
l1 is 0 or 1;
l2 is an integer from 0 to 2;
when l1 and l2 are both 0, A represents a single bond when T is a single bond;
when l1 is 1, B represents a single bond when T is a single bond;
H and I are each independently a group selected from a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, and combinations thereof)
The side chain type polymer according to claim 1, which has any one type of photosensitive side chain selected from the group consisting of The following formulas (7) to (10)
(In the formula, A, B and D are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO; Represents —O— or —O—CO—CH═CH—;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
l represents an integer of 1 to 12;
m represents an integer of 0 to 2, and m1 and m2 represent an integer of 1 to 3;
n represents an integer of 0 to 12 (provided that when n = 0, B is a single bond);
Y ₂ is a group selected from the group consisting of a divalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof, The hydrogen atoms bonded to each independently represent —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or 1 to 5 carbon atoms. May be substituted with an alkyloxy group of
R represents a hydroxy group, an alkoxy group having 1 to 6 carbon atoms, or the same definition as Y ₁ ).
The side chain type polymer according to any one of claims 1 to 3, which has any one type of photosensitive side chain selected from the group consisting of:

The following formulas (11) to (13)
(In the formula, each A is independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, Or -O-CO-CH = CH-;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
l represents an integer of 1 to 12, m represents an integer of 0 to 2, and m1 represents an integer of 1 to 3;
R represents a ring selected from a monovalent benzene ring, a naphthalene ring, a biphenyl ring, a furan ring, a pyrrole ring, and an alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or a phase selected from those substituents. A group in which different 2 to 6 rings are bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently -COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5). represents an alkyl _{group), - NO 2, -CN,} -CH = C (CN) 2, -CH = CH-CN, a halogen group, an alkyl group of 1 to 5 carbon atoms, or alkyl of 1 to 5 carbon atoms (It may be substituted with an oxy group, or represents a hydroxy group or an alkoxy group having 1 to 6 carbon atoms)
The side chain type polymer according to any one of claims 1 to 3, which has any one type of photosensitive side chain selected from the group consisting of:

Following formula (14) or (15)
(In the formula, each A is independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, Or -O-CO-CH = CH-;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
l represents an integer of 1 to 12, and m1 and m2 represent an integer of 1 to 3)
The side chain type polymer according to any one of claims 1 to 3, which has a photosensitive side chain represented by formula (1).

Following formula (16) or (17)
(In the formula, A represents a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, or —O—. Represents CO—CH═CH—;
X is a single bond, —COO—, —OCO—, —N═N—, —C═C—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
l represents an integer of 1 to 12, and m represents an integer of 0 to 2)
The side chain type polymer according to any one of claims 1 to 3, which has a photosensitive side chain represented by formula (1).

Following formula (18) or (19)
(In the formula, A and B are each independently a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O; -Represents-or -O-CO-CH = CH-;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
one of q1 and q2 is 1 and the other is 0;
l represents an integer of 1 to 12, and m1 and m2 represent an integer of 1 to 3;
R ₁ is a hydrogen atom, —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. The side chain type polymer according to any one of claims 1 to 3, which has any one kind of photosensitive side chain selected from the group consisting of: an oxy group.

Following formula (20)
(In the formula, A represents a single bond, —O—, —CH ₂ —, —COO—, —OCO—, —CONH—, —NH—CO—, —CH═CH—CO—O—, or —O; Represents —CO—CH═CH—;
Y ₁ represents a ring selected from a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, pyrrole ring and alicyclic hydrocarbon having 5 to 8 carbon atoms, or the same or selected from those substituents. 2 to 6 different rings are groups bonded through a bonding group B, and the hydrogen atoms bonded to them are each independently —COOR ₀ (wherein R ₀ is a hydrogen atom or a carbon number of 1 to 5 represents an alkyl group), —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. May be substituted with an alkyloxy group;
X is a single bond, —COO—, —OCO—, —N═N—, —CH═CH—, —C≡C—, —CH═CH—CO—O—, or —O—CO—CH═. When CH is 2 and the number of X is 2, X may be the same or different;
The side chain type polymer according to any one of claims 1 to 3, which has a photosensitive side chain represented by the following formula: l represents an integer of 1 to 12, and m represents an integer of 0 to 2.

The following formulas (21) to (31)
Wherein A and B have the same definition as above;
Y ₃ is a group selected from the group consisting of a monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, nitrogen-containing heterocycle, alicyclic hydrocarbon having 5 to 8 carbon atoms, and combinations thereof. And each hydrogen atom bonded thereto may be independently substituted with —NO ₂ , —CN, a halogen group, an alkyl group having 1 to 5 carbon atoms, or an alkyloxy group having 1 to 5 carbon atoms;
R ₃ is a hydrogen atom, —NO ₂ , —CN, —CH═C (CN) ₂ , —CH═CH—CN, halogen group, monovalent benzene ring, naphthalene ring, biphenyl ring, furan ring, nitrogen-containing A heterocyclic ring, an alicyclic hydrocarbon having 5 to 8 carbon atoms, an alkyl group having 1 to 12 carbon atoms, or an alkoxy group having 1 to 12 carbon atoms;
one of q1 and q2 is 1 and the other is 0;
l represents an integer of 1 to 12, m represents an integer of 0 to 2, provided that in formulas (23) to (24), the sum of all m is 2 or more, and formulas (25) to (26 ), The sum of all m is 1 or more, and m1, m2 and m3 each independently represents an integer of 1 to 3;
R ₂ is a hydrogen atom, —NO ₂ , —CN, a halogen group, a monovalent benzene ring, a naphthalene ring, a biphenyl ring, a furan ring, a nitrogen-containing heterocyclic ring, and an alicyclic hydrocarbon having 5 to 8 carbon atoms, And represents an alkyl group or an alkyloxy group;
Z ₁ and Z ₂ represent a single bond, —CO—, —CH ₂ O—, —CH═N—, —CF ₂ —)
The side chain polymer according to any one of claims 1 to 9, which has any one liquid crystalline side chain selected from the group consisting of:

  (A) A polymer composition comprising the side chain polymer according to any one of claims 1 to 10, and (B) an organic solvent.   The polymer composition further has (C) one primary amino group and a nitrogen-containing aromatic heterocyclic ring in the molecule, and the primary amino group is an aliphatic hydrocarbon group or a non-aromatic cyclic group. The composition according to claim 11, comprising an amine compound bonded to a hydrocarbon group. The component (C) is represented by the following formula A- [1] (wherein Y ₁₁ is a divalent organic group having an aliphatic hydrocarbon group or a non-aromatic cyclic hydrocarbon group, and Y ₁₂ contains nitrogen. The composition according to claim 12, which is an amine compound represented by an aromatic heterocyclic ring.

[I] The process of apply | coating the composition of any one of Claims 11-13 on the board | substrate which has a conductive film for a horizontal electric field drive, and forming a coating film;
[II] a step of irradiating the coating film obtained in [I] with polarized ultraviolet rays; and [III] a step of heating the coating film obtained in [II];
The manufacturing method of the board | substrate which has the said liquid crystal aligning film which obtains the liquid crystal aligning film for horizontal electric field drive type liquid crystal display elements by which orientation control ability was provided by having.   The board | substrate which has the liquid crystal aligning film for horizontal electric field drive type liquid crystal display elements manufactured by the method of Claim 14.   A lateral electric field drive type liquid crystal display device comprising the substrate according to claim 15. Preparing a substrate (first substrate) according to claim 15;
[I '] The process of apply | coating the polymer composition of any one of Claims 11-13 on a 2nd board | substrate, and forming a coating film;
[II ′] a step of irradiating the coating film obtained in [I ′] with polarized ultraviolet rays; and [III ′] a step of heating the coating film obtained in [II ′];
Obtaining a liquid crystal alignment film imparted with alignment control capability by having a second substrate having the liquid crystal alignment film; and [IV] liquid crystal alignment of the first and second substrates via liquid crystal A step of obtaining a liquid crystal display element by arranging the first and second substrates to face each other so that the films face each other;
A method for producing a liquid crystal display element, comprising obtaining a lateral electric field drive type liquid crystal display element. A lateral electric field drive type liquid crystal display device manufactured by the method according to claim 17.

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