JP2012087165A - Liquid crystal composition containing polymerizable compound and liquid crystal display using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polymerizable compound-containing liquid crystal composition which ensures high liquid crystal alignment restraining force after polymerization and does not cause defects such as image sticking, to provide a polymerizable compound-containing liquid crystal composition in which the polymerizable compound is well compatible with a liquid crystal material and does not cause defects such as deposition, and to provide a liquid crystal display to which liquid crystal alignment capability is imparted by polymerization of a polymerizable compound-containing liquid crystal composition to exhibit excellent display performance.SOLUTION: The liquid crystal composition contains, as a first component, a polymerizable compound represented, e.g., by formula (I-35-a) as a constituent element. The liquid crystal display uses the liquid crystal composition.

Description

  The present invention relates to a liquid crystal composition containing a polymerizable compound, and further to a liquid crystal display device using the liquid crystal composition.

  A PSA (Polymer Sustained Alignment) type liquid crystal display device has a structure in which a polymer structure is formed in a cell in order to control the pretilt angle of liquid crystal molecules, and has been developed as a liquid crystal display element due to its high-speed response and high contrast. Is underway.

  A PSA-type liquid crystal display device is manufactured by injecting a polymerizable composition comprising a liquid crystalline compound and a polymerizable compound between substrates and applying a voltage to polymerize the polymerizable compound in a state in which the liquid crystal molecules are aligned to produce liquid crystal molecules. This is done by fixing the orientation. As a cause of image sticking which is a display defect of this PSA type liquid crystal display element, there are known impurities and changes in alignment of liquid crystal molecules (changes in pretilt angle).

  The seizure due to impurities is caused by a polymerizable compound remaining incompletely and a polymerization initiator added to accelerate the progress of the polymerization. For this reason, it is necessary to minimize the residual amount of the polymerizable compound after completion of the polymerization and to suppress the amount of the polymerization initiator to be added. For example, when a large amount of a polymerization initiator is added in order to cause the polymerization to proceed completely, the voltage holding ratio of the display element is lowered due to the remaining polymerization initiator, and the display quality is adversely affected. In addition, if the amount of the polymerization initiator used in the polymerization is reduced in order to suppress the decrease in voltage holding ratio, the polymerization does not proceed completely, so the polymerizable compound remains, and the occurrence of seizure due to the remaining polymerizable compound. Is inevitable. In addition, in order to completely cure the polymerizable compound with a small addition amount of the polymerization initiator and suppress the residual of the polymerizable compound, there is a method of adding a large amount of energy by irradiating strong ultraviolet rays for a long time in the polymerization. . However, in this case, the manufacturing apparatus is increased in size and the manufacturing efficiency is lowered, and the liquid crystal material is deteriorated by ultraviolet rays. Therefore, in the conventional liquid crystal composition containing a polymerizable compound, it has been difficult to simultaneously reduce the remaining amounts of both the uncured polymerizable compound and the polymerization initiator. Therefore, there has been a demand for a liquid crystal composition containing a polymerizable compound that can be polymerized without using a polymerization initiator.

  On the other hand, the occurrence of image sticking is also known to be caused by a change in the pretilt angle of liquid crystal molecules in a liquid crystal composition containing a polymerizable compound. That is, if the polymer, which is a cured product of the polymerizable compound, is flexible, the structure of the polymer will change if the same pattern is displayed for a long time when the display element is configured, and as a result, the pretilt angle will change. End up. Since the change in the pretilt angle causes burn-in, a polymerizable compound that forms a polymer having a rigid structure in which the polymer structure does not change is required.

  Conventionally, in order to prevent image sticking by improving the rigidity of a polymer, a display element is configured using a polymerizable compound having a ring structure and a structure such as a 1,4-phenylene group having only a polymerizable functional group. (See Patent Document 1) and the construction of a display element using a polymerizable compound having a biaryl structure (see Patent Document 2) have been studied. However, since these polymerizable compounds have low compatibility with the liquid crystal compound, precipitation of the polymerizable compound occurs when the liquid crystal composition is prepared, so that application as a practical liquid crystal composition is difficult. there were.

  Also, in order to prevent seizure by improving the rigidity of the polymer, a mixture of a bifunctional polymerizable compound and a trifunctional or higher functional polymerizable compound such as dipentaerythritol pentaacrylate or dipentaerythritol hexaacrylate It has been proposed to form a display element using a liquid crystal composition (see Patent Document 3). However, since dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate do not have a ring structure in the molecule, their affinity with liquid crystal compounds is weak and their ability to regulate alignment is weak, so sufficient alignment stability There was a problem that could not be obtained. In addition, it is essential to add a polymerization initiator in the polymerization of these polymerizable compounds. If the polymerization initiator is not added, the polymerizable compound remains after the polymerization.

  From the above, characteristics such as seizure characteristics of display elements, alignment stability, stability as a composition that does not cause precipitation, and production efficiency when preparing PSA type liquid crystal display elements, which are required for polymerizable compound-containing liquid crystal compositions. It is difficult to satisfy and needs further improvement.

JP 2003-307720 A JP 2008-116931 A JP 2004-302096 A

  The problem to be solved by the present invention is to provide a polymerizable compound-containing liquid crystal composition that has a high ability to regulate the alignment of liquid crystal after polymerization and does not cause defects such as image sticking. Furthermore, it is providing the liquid crystal display element which the liquid crystal aligning ability was provided by polymerizing the polymeric compound containing liquid crystal composition, and was excellent in display performance.

  As a result of studying various polymerizable compounds and various non-polymerizable liquid crystal compounds, the inventors of the present application have found that a liquid crystal containing a polymerizable compound having a specific structure and a polymerizable compound composed of a non-polymerizable liquid crystal compound. The present inventors have found that the composition can solve the above-mentioned problems and have completed the present invention.

  That is, as the first component, the general formula (I)

(In the formula, R ¹¹ , R ¹² , R ¹³ and R ¹⁴ are each independently the following formulas (R-1) to (R-15):

Any one of
S ¹¹ , S ¹² , S ¹³ and S ¹⁴ each independently represents an alkylene group having 1 to 12 carbon atoms or a single bond, and one —CH ₂ — in the alkylene group or two or more not adjacent to each other —CH ₂ — may be replaced by —O—, —COO—, —OCO— or —OCOO—,
Z ¹¹ and Z ¹² each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a thiocyanato group, a trifluoromethoxy group, a trifluoromethyl group, a difluoromethoxy group, or an alkyl group having 1 to 12 carbon atoms. In the alkyl group, one —CH ₂ — or two or more non-adjacent —CH ₂ — represents an oxygen atom, a sulfur atom, —CO—, —COO—, —OCO—, —OCOO—, — CH = CH— or —C≡C— may be substituted, or Z ¹¹ and Z ¹² may be independently of each other R ¹⁵ —S ¹⁵ — (wherein R ¹⁵ represents the same meaning as R ¹¹ , S ¹⁵ represents the same meaning as ^{S 11, Z 11} and ^{Z 12} are both ^R 15 ^{-S 15} - to represent the can, even if ^{R 15} and / or ^{S 15} there are multiple different be the same Good.)
L ¹¹ , L ¹² and L ¹³ are each independently a single bond, —O—, —S—, —CH ₂ —, —OCH ₂ —, —CH ₂ O—, —CO—, —C ₂ H ₄ —. _{, -COO -, - OCO -,} - OCOOCH 2 -, - CH 2 OCOO -, - CO-NR a -, - NR a -CO -, - SCH 2 -, - CH 2 S -, - CH = CR a ^{-COO -, - CH = CR a} -OCO -, - COO-CR a = CH -, - OCO-CR a = CH -, - COO-CR a = CH-COO -, - COO-CR a = CH- ^{OCO -, - OCO-CR a} = CH-COO -, - OCO-CR a = CH-OCO -, - COOC 2 H 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C 2 _{H 4 COO -, - CH 2} COO -, - CH 2 OCO -, - COOCH _{-, - OCOCH 2 -, -} CH = CH -, - CF = CF -, - CF = CH -, - CH = CF -, - CF 2 -, - CF 2 O -, - OCF 2 -, - CF 2 CH ₂ —, —CH ₂ CF ₂ —, —CF ₂ CF ₂ — or —C≡C— (wherein, R ^a each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms). Wherein at least one of L ¹¹ , L ¹² and L ¹³ present in the molecule is —COO—, —CH═CH—COO—, —CH═CH—OCO—, —CH═CCH ₃ —COO. _{-, - CH = CCH 3 -OCO} -, - C 2 H 4 -COO -, - C 2 H 4 -OCO -, - CH 2 -COO- or an _-CH 2 -OCO-,
M ¹¹ and M ¹² are each independently 1,4-phenylene group, 1,4-cyclohexylene group, pyridine-2,5-diyl group, pyrimidine-2,5-diyl group, naphthalene-2,6-diyl. Group, indane-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or 1,3-dioxane-2,5-diyl group, M ¹¹ and M ¹² Are each independently unsubstituted or an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, and an alkyl group having 1 to 12 carbon atoms. May be substituted with a halogenated alkoxy group, halogen, cyano group or nitro group,
m ¹¹ , m ¹² , m ¹³ and m ¹⁴ each independently represents 0 or 1, but when m ¹¹ , m ¹² , m ¹³ and / or m ¹⁴ represents 0 (R ¹¹ -S ¹¹ ) _{0 ^{-, (R 12 -S 12)}} 0 -, (R 13 -S 13) 0 -, (R 14 -S 14) 0 - and / or _{^{(R 15 -S 15) 0 -}} , represents a hydrogen atom,
^{m 11 + m 12 + m 13} + m 14 each represents 1, 2, 3 or ^{4, Z 11} and ^{Z 12} are both ^R 15 ^{-S 15} - if it represents a ^{non-m 11 + m 12 + m 13} + m 14 is 3 or 4 the ^{stands, Z 11} or only one of ^{Z 12} is ^R 15 ^{-S 15} - if it represents an ^{m 11 + m 12 + m 13} + m 14 represents 2, 3 or ^{4, Z 11} and ^{Z 12} are both ^{R 15} - When representing S ^15-, m ¹¹ + m ¹² + m ¹³ + m ¹⁴ represents 1, 2, 3 or 4;
n ¹¹ and n ¹² each independently represent 0, 1 or 2, but n ¹¹ + n ¹² represents 0, 1 or 2, and when n ¹¹ and / or n ¹² represents 2, a plurality of M ¹¹ , M ¹² , L ¹¹ and / or L ¹³ may be the same or different. ) Containing one or more polymerizable compounds represented by the general formula (II)

(In the formula, R ²¹ and R ²² each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one —CH ₂ — present in these groups. Or two or more non-adjacent —CH ₂ — may be substituted with —O— or —S—, and one or more hydrogen atoms present in these groups are fluorine atoms or chlorine May be substituted with atoms,
M ²¹ , M ²² and M ²³ are each independently (a) a trans-1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more non-adjacent — CH ₂ — may be replaced by —O— or —S—),
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═), 2-fluoro- 1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group and (c) 1,4-cyclohexenylene group, 1,4-bicyclo [2 2.2] Octylene group, piperidine-2,5-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group and 1,2,3,4-tetrahydronaphthalene-2, Represents a group selected from the group consisting of 6-diyl groups,
o represents 0, 1 or 2;
L ²¹ and L ²² are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, —CH═CH—, —CH═N—N═CH— or —C≡C—, when a plurality of L ²² are present, they may be the same or different, and a plurality of M ²³ are present. In some cases, they may be the same or different. 1) or two or more compounds represented by formula (III), and the general formula (IIIa), general formula (IIIb) and general formula (IIIc) are used as the third component.

(Wherein R ³¹ , R ³² and R ³³ each independently represents an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one —CH present in these groups) ₂ or two or more non-adjacent —CH ₂ — may be substituted with —O— or —S—, and one or more hydrogen atoms present in these groups are fluorine atoms. Or it may be substituted with a chlorine atom,
M ³¹ , M ³² , M ³³ , M ³⁴ , M ³⁵ , M ³⁶ , M ³⁷ and M ³⁸ are independent of each other,
(D) trans-1,4-cyclohexylene group (the one present in the group -CH ₂ - or nonadjacent two or more -CH ₂ - is replaced by -O- or -S- May be)
(E) 1,4-phenylene group (one —CH═ present in this group or two or more non-adjacent —CH═ may be replaced by —N═), 3-fluoro- 1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, and
(F) 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-2,5-diyl group, naphthalene-2,6-diyl group, 1,2,3 , 4-tetrahydronaphthalene-2,6-diyl group and decahydronaphthalene-2,6-diyl group are selected from the group consisting of the above group (d), group (e) or group (f). Each hydrogen atom contained may be substituted with a cyano group, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom,
L ³¹ , L ³² , L ³³ , L ³⁴ , L ³⁵ , L ³⁶ , L ³⁷ and L ³⁸ are each independently a single bond, —COO—, —OCO—, —CH ₂ CH ₂ —, — (CH _{2 ) 4 -, - OCH 2 -} , - CH 2 O -, - OCF 2 -, - CF 2 O- or represents ^{-C≡C-, M 32, M 34,} M 35, M 37, M 38, L ^When there are a plurality of ³¹ , L ³³ , L ³⁵ , L ³⁶ and / or L ³⁸ , they may be the same or different,
X ³¹ , X ³² , X ³³ , X ³⁴ , X ³⁵ , X ³⁶ and X ³⁷ each independently represent a hydrogen atom or a fluorine atom,
Y ³¹ , Y ³² and Y ³³ are each independently a fluorine atom, chlorine atom, cyano group, thiocyanato group, trifluoromethoxy group, trifluoromethyl group, 2,2,2-trifluoroethyl group or difluoromethoxy group. Represent,
p, q, r, s and t each independently represent 0, 1 or 2, but q + r and s + t are 2 or less. Or a compound selected from the group consisting of compounds represented by formula (IVa), general formula (IVb) and general formula (IVc)

(Wherein R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ and R ⁴⁶ each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one -CH 2 present in the radical _- or nonadjacent two or more -CH 2 _- may be substituted by -O- or -S-, also present in the group 1 One or more hydrogen atoms may be substituted with fluorine atoms or chlorine atoms,
M ⁴¹ , M ⁴² , M ⁴³ , M ⁴⁴ , M ⁴⁵ , M ⁴⁶ , M ⁴⁷ , M ⁴⁸ and M ⁴⁹ are independent of each other,
(G) trans-1,4-cyclohexylene group (the one present in the group -CH ₂ - or nonadjacent two or more -CH ₂ - is replaced by -O- or -S- May be)
(H) a 1,4-phenylene group (one -CH = present in the group or two or more non-adjacent -CH = may be replaced by -N =), and
(I) 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-2,5-diyl group, naphthalene-2,6-diyl group, 1,2,3 , 4-tetrahydronaphthalene-2,6-diyl group and decahydronaphthalene-2,6-diyl group are selected from the group consisting of the group (g), group (h) or group (i). Each hydrogen atom contained may be substituted with a cyano group, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom,
L ⁴¹ , L ⁴² , L ⁴³ , L ⁴⁴ , L ⁴⁵ , L ⁴⁶ , L ⁴⁷ , L ⁴⁸ and L ⁴⁹ are each independently a single bond, —COO—, —OCO—, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O— or —C≡C— represents M ⁴² , M ⁴³ , M ⁴⁵ , M ⁴⁶ , M ⁴⁸ , M ⁴⁹ , L ⁴¹ , L ⁴³ , L ⁴⁴ , L ⁴⁶ , L ⁴⁷ and / or a plurality of L ⁴⁹ , they may be the same or different,
X ⁴¹ , X ⁴² , X ⁴³ , X ⁴⁴ , X ⁴⁵ , X ⁴⁶ , X ⁴⁷ and X ⁴⁸ each independently represent a hydrogen atom, a trifluoromethyl group, a trifluoromethoxy group, a chlorine atom or a fluorine atom, Any one of X ⁴¹ and X ⁴² represents a fluorine atom, any one of X ⁴³ , X ⁴⁴ and X ⁴⁵ represents a fluorine atom, and any one of X ⁴⁶ , X ⁴⁷ and X ⁴⁸ represents fluorine. X ⁴⁶ and X ⁴⁷ do not represent a fluorine atom at the same time, and X ⁴⁶ and X ⁴⁸ do not represent a fluorine atom at the same time,
G represents —CH ₂ — or —O—;
u, v, w, x, y and z each independently represent 0, 1 or 2, but u + v, w + x and y + z are 2 or less. And a polymerizable compound-containing liquid crystal composition characterized by containing one or more compounds selected from the group consisting of compounds represented by formula (1), and a liquid crystal display device using the liquid crystal composition. provide.

  Since the polymerizable compound that is an essential component of the present invention has excellent compatibility with other non-polymerizable liquid crystal compounds, a stable liquid crystal composition can be obtained. In addition, since this polymerizable compound has a skeleton similar to that of a liquid crystal compound and has three or more functional groups, a polymer having a high crosslinking density and a rigid polymer is formed by a polymerization reaction. Is strong. In addition, the liquid crystal composition containing the polymerizable compound can polymerize the polymerizable compound without using a photopolymerization initiator or with a very small amount of addition, and an unpolymerized polymerizable compound remaining after the polymerization can be obtained. There can be no or very little. In addition, the energy required for polymerization of the polymerizable compound can be greatly reduced. As a result, the display defects of the liquid crystal display element to which orientation is imparted by polymerizing the polymerizable compound in the liquid crystal material can be greatly reduced, and the energy cost for production can be reduced and the production efficiency can be improved. It is useful as a liquid crystal material for liquid crystal display elements.

The polymerizable compound used in the liquid crystal composition containing the polymerizable compound of the present invention is composed of a compound represented by the general formula (I). In the general formula (I), Z ¹¹ and Z ¹² are a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a thiocyanato group, a trifluoromethoxy group, a trifluoromethyl group, a difluoromethoxy group, or one —CH ₂ — or Two or more non-adjacent —CH ₂ — are substituted with an oxygen atom, a sulfur atom, —CO—, —COO—, —OCO—, —OCOO—, —CH═CH— or —C≡C—. It is preferably a good alkyl group having 1 to 12 carbon atoms or R ¹⁵ —S ¹⁵ — (wherein R ¹⁵ represents the same meaning as R ^11, and S ¹⁵ represents the same meaning as S ¹¹ ). Further, a hydrogen atom, a fluorine atom, one —CH ₂ — or two or more non-adjacent —CH ₂ — may be substituted with an oxygen atom, or an alkyl group having 1 to 12 carbon atoms or R ¹⁵ —S ^15. It must be − More preferably, a hydrogen atom, one —CH ₂ — or two or more non-adjacent —CH ₂ — atoms may be substituted with an oxygen atom, or an alkyl group having 1 to 12 carbon atoms or R ¹⁵ —S ^15. -Is preferred.

R ¹¹ , R ¹² , R ¹³ , R ¹⁴ and / or R ¹⁵ represent a polymerizable group, and specific examples of the polymerizable group include the structures shown below.

These polymerizable groups are cured by radical polymerization, radical addition polymerization, cationic polymerization, and anionic polymerization. In particular, when performing ultraviolet polymerization as a polymerization method, the formula (R-1), formula (R-2), formula (R-4), formula (R-5), formula (R-7), formula (R -11), formula (R-13) or formula (R-15) are preferred, and formula (R-1), formula (R-2), formula (R-7), formula (R-11) or formula ( R-13) is more preferred, and formula (R-1) or formula (R-2) is more preferred. When there are a plurality of R ¹¹ , R ¹² , R ¹³ , R ¹⁴ and / or R ¹⁵ in the molecule, they may be the same or different.

S ¹¹ , S ¹² , S ¹³ , S ¹⁴ and / or S ¹⁵ represent a spacer group or a single bond, and the spacer group includes one —CH ₂ — or two or more —CH ₂ not adjacent to each other. An alkylene group having 1 to 12 carbon atoms or a single bond in which-may be replaced by an oxygen atom, -COO-, -OCO-, or -OCOO- is preferable. In order to suppress the amount of change in the pretilt angle, a single bond or one —CH ₂ — or two or more non-adjacent —CH ₂ — is replaced with an oxygen atom, —COO—, —OCO— or —OCOO—. An alkylene group having a carbon chain length of 1 to 4 that may be used is preferred. On the other hand, a methylene group having a certain length is preferable for improving the solubility. However, if the length is too long, the flexibility of the polymer after polymerization is increased, which causes baking. To improve this reason solubility, one -CH ₂ - or nonadjacent two or more -CH ₂ - is an oxygen atom, -COO -, - OCO- or -OCOO- be replaced by A good alkylene group having 1 to 8 carbon atoms is preferred, and an alkylene group having 1 to 6 carbon atoms is more preferred.

L ¹¹ , L ¹² and L ¹³ are each independently a single bond, —O—, —CH ₂ —, —OCH ₂ —, —CH ₂ O—, —CO—, —C ₂ H ₄ —, —COO. _{-, - OCO -, - OCOOCH} 2 -, - CH 2 OCOO -, - CH = CH-COO -, - CH = CH-OCO -, - COO-CH = CH -, - OCO-CH = CH -, - _{CH = CCH 3 -COO -, -} CH = CCH 3 -OCO -, - COO-CCH 3 = CH -, - OCO-CCH 3 = CH -, - COO-CH = CH-COO -, - COO-CH = CH-OCO -, - OCO- CH = CH-COO -, - OCO-CH = CH-OCO -, - COO-CCH 3 = CH-COO -, - COO-CCH 3 = CH-OCO -, - OCO- _{CCH 3 = CH-COO -,} - OCO-CC _{3 = CH-OCO -, -} COOC 2 H 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C 2 H 4 COO -, - CH 2 COO -, - CH 2 OCO -, - COOCH ₂ —, —OCOCH ₂ — or —CH═CH— is preferable, and further a single bond, —O—, —CH ₂ —, —OCH ₂ —, —CH ₂ O—, —CO—, —C ₂ H _{4. -, - COO -, - OCO} -, - OCOOCH 2 -, - CH 2 OCOO -, - CH = CH-COO -, - OCO-CH = CH -, - CH = CCH 3 -COO -, - OCO-CCH _{3 = CH -, - OCO-} CH = CH-COO -, - OCO-CCH 3 = CH-COO -, - COOC 2 H 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C _{2 H 4 COO -, - CH} 2 COO -, - C _{2 OCO -, - COOCH 2 -} , - OCOCH2- or -CH = CH- is more preferable. In the case where importance is attached to the polymerization rate, it is preferable that a structure of —CH═CH— or —CO— is included, and that these are directly bonded to an aromatic ring.

M ¹¹ and M ¹² are unsubstituted or an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, and a halogenated alkoxy having 1 to 12 carbon atoms. 1,4-phenylene group, 1,4-cyclohexylene group, pyridine-2,5-diyl group, pyrimidine-2,5-diyl group, naphthalene which may be substituted with a group, halogen, cyano group or nitro group -2,6-diyl group, indan-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or 1,3-dioxane-2,5-diyl group are preferred, Further, it may be unsubstituted, an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, or a 1,4-phenylene group, 1,4-cyclohexylene group, or The array type-2,6-diyl group is preferred.

M ¹¹ and ^{M 12} is either to improve the compatibility with other components is at least one of trans-1,4-cyclohexylene ^group, at least one or more hydrogen atoms are fluorine in ^{M 11} and ^{M 12} atom, an alkyl group or or substituted at the alkoxy group ^{S 11, S 12, S 13} , S 14 and / or preferably all ^{S 15} is not a single bond, ^{M 11} and M to improve the polymerizable it is preferred that at least one ¹² is an aromatic ^ring, it is preferable that all of the ^{S 11, S 12, S 13} , S 14 and / or ^{S 15} is a single bond. High polymerizability can reduce the irradiation intensity during polymerization and reduce the amount of the remaining polymerizable compound, improving productivity, preventing deterioration of the liquid crystal composition, and preventing image sticking. Defects can be reduced.

n ¹¹ and n ¹² independently represent 0, 1 or 2, but when improvement in compatibility with other components is particularly required, n ¹¹ + n ¹² is preferably 0 or 1. If the compatibility with other components is low, precipitation or the like occurs during transportation or manufacture of the liquid crystal display element, which causes a change in content or a display defect. In addition, when the alignment regulating force is low, the alignment of the liquid crystal molecules is changed, which causes display defects.

  The compound represented by the general formula (I) preferably has 3 to 6 polymer groups in the molecule, preferably 3 to 5, and preferably 3 or 4.

  Of the structures formed by combinations of the above options, —CH═CH—CH═CH—, —C≡C—C≡C— and —CH═CH—C≡C— are preferred from the viewpoint of chemical stability. Absent. Similarly, those in which hydrogen atoms in these structures are replaced by fluorine atoms are also not preferable. Similarly, a structure in which oxygens are combined, a structure in which sulfur atoms are combined, and a structure in which sulfur atoms and oxygen atoms are combined are also not preferable. Similarly, a structure in which nitrogen atoms are bonded to each other, a structure in which nitrogen atoms and oxygen atoms are bonded, and a structure in which nitrogen atoms and sulfur atoms are bonded are also not preferable.

  More specifically, the compounds represented by the general formula (I) are preferably compounds represented by the following general formulas (I-1) to (I-105).

(In the formula, i ¹¹ independently represents an integer of 0 to 12, but when i ¹¹ represents 0, oxygen atoms bonded to the aromatic ring are removed, and X ¹¹ are independently hydrogen atoms. , A fluorine atom, a chlorine atom, an alkyl group having 1 to 4 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, Y ¹¹ independently represents a hydrogen atom or a methyl group, i ¹¹ , X ¹¹ and When a plurality of Y ¹¹ are present, they may be the same or different.) Furthermore, compounds represented by the general formulas (I-1) to (I-100) are preferred.

  In the polymerizable compound-containing liquid crystal composition of the present invention, it contains at least one polymerizable compound represented by the general formula (I), preferably 1 to 5 types, preferably 1 to 3 types. It is particularly preferable to do this. If the content of the compound represented by the general formula (I) is small, the alignment regulating power for the non-polymerizable liquid crystal compound is weak, and if it is too large, the necessary energy during polymerization rises and the polymerization remains without being polymerized. The lower limit value is preferably 0.01% by mass, more preferably 0.03% by mass, and the upper limit value is preferably 2.0% by mass, because the amount of the active compound increases. More preferably, it is 1.0 mass%.

In the compound represented by the general formula (II) used as the second component, R ²¹ and R ²² are each independently an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms (these One —CH ₂ — present in the group or two or more non-adjacent —CH ₂ — substituted with —O— or —S—, and one present in these groups or 2 or more hydrogen atoms include those substituted with a fluorine atom or a chlorine atom.), Preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or 2 to 5 carbon atoms. Are more preferable, and an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms is particularly preferable. More preferably, it is linear.

M ^{21, M 22} and ^{M 23} are independently of one another, are a trans-1,4-cyclohexylene group (the one present in the group -CH ₂ - or two -CH ₂ nonadjacent - is - Including a group substituted with O-), 1,4-phenylene group (one -CH = or two or more non-adjacent -CH = present in this group is replaced with -N =) 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2. 2] Octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl Group is preferred, trans-1,4-cycl Hexylene group, a 1,4-phenylene group or 1,4-bicyclo [2.2.2] octylene group are more preferable, trans-1,4-cyclohexylene group or 1,4-phenylene group is particularly preferred. o is preferably 0, 1 or 2, and more preferably 0 or 1. L ²¹ and L ²² are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, —CH═CH—, —CH═N—N═CH— or —C≡C— are preferred, and a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ — or —CH ₂ is preferred. O-, more preferably a single bond or _-CH 2 CH ₂ - is more preferable.

  Of the structures formed by combinations of the above options, —CH═CH—CH═CH—, —C≡C—C≡C— and —CH═CH—C≡C— are preferred from the viewpoint of chemical stability. Absent. Similarly, those in which hydrogen atoms in these structures are replaced by fluorine atoms are also not preferable. Similarly, a structure in which oxygens are combined, a structure in which sulfur atoms are combined, and a structure in which sulfur atoms and oxygen atoms are combined are also not preferable. Similarly, a structure in which nitrogen atoms are bonded to each other, a structure in which nitrogen atoms and oxygen atoms are bonded, and a structure in which nitrogen atoms and sulfur atoms are bonded are also not preferable.

  More specifically, the general formula (II) is preferably a compound represented by the following general formula (II-A) to general formula (II-P) as a specific structure.

Wherein R ²³ and R ²⁴ are each independently an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkenyloxy group having 3 to 10 carbon atoms. Represents.)
R ²³ and R ²⁴ are each independently preferably an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and an alkyl group or carbon having 1 to 5 carbon atoms An alkoxy group having 1 to 10 is more preferable. More preferably, it is linear.

  Among the compounds represented by general formula (II-A) to general formula (II-P), general formula (II-A), general formula (II-B), general formula (II-C), and general formula (II) -E), general formula (II-H), general formula (II-I), general formula (II-I) or a compound represented by general formula (II-K) is preferred, and general formula (II-A) The compound represented by formula (II-C), formula (II-E), formula (II-H) or formula (II-I) is more preferable.

  In the present invention, it contains at least one compound represented by the general formula (II), preferably 1 to 10 types, more preferably 2 to 8 types, and most preferably the general formula (II). Is preferably 5% by mass, more preferably 10% by mass, still more preferably 20% by mass, and particularly preferably 30% by mass. The upper limit is preferably 80% by mass, more preferably 70% by mass, and still more preferably 60% by mass.

In the compounds represented by the general formula (IIIa), general formula (IIIb) and general formula (IIIc) used as the third component, R ³¹ , R ³² and R ³³ are each independently of 1 to 10 carbon atoms. An alkyl group or an alkenyl group having 2 to 10 carbon atoms, a linear alkyl group having 1 to 15 carbon atoms or an alkenyl group having 2 to 15 carbon atoms (one —CH ₂ — or an adjacent group present in these groups) Two or more —CH ₂ — that are not substituted are substituted with —O— or —S—, and one or more hydrogen atoms present in these groups are fluorine atoms or chlorine atoms. In addition, a substituted alkyl group is also preferable. A linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or an alkenyl group having 2 to 10 carbon atoms is more preferable. ~ 8 linear alk Group or an alkoxy group having 1 to 8 carbon atoms is particularly preferred.

M ³¹ , M ³² , M ³³ , M ³⁴ , M ³⁵ , M ³⁶ , M ³⁷ and M ³⁸ are each independently a trans-1,4-cyclohexylene group (one methylene present in this group). A group or two or more methylene groups not adjacent to each other include those in which -O- or -S- is substituted.), 1,4-phenylene group (one -CH = present in this group) Or two or more non-adjacent —CH═ are replaced by —N═), 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, Groups represented by piperidine-1,4-diyl group, naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group and decahydronaphthalene-2,6-diyl group ( In each group, a hydrogen atom is a cyano group, Including those substituted with a nitrogen atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom.), Trans-1,4-cyclohexylene group, 1,4-phenylene group, 3-fluoro -1,4-phenylene group or 3,5-difluoro-1,4-phenylene group is more preferable, trans-1,4-cyclohexylene group or 1,4-phenylene group is more preferable, and trans-1,4 A cyclohexylene group is particularly preferred.

L ³¹ , L ³² , L ³³ , L ³⁴ , L ³⁵ , L ³⁶ , L ³⁷ and L ³⁸ are each independently a single bond, —OCO—, —COO—, —CH ₂ CH ₂ —, — (CH _{2 ) 4 -, - OCH 2 -} , - CH 2 O -, - OCF 2 -, - CF 2 O- or -C≡C-, more preferably a single _{bond, -CH 2 CH 2 -, -} (CH 2) 4 -Or -C≡C- is more preferable, and a single bond or -CH ₂ CH ₂ -is particularly preferable.

X ³¹ , X ³² , X ³³ , X ³⁴ , X ³⁵ , X ³⁶ and X ³⁷ each independently represent a hydrogen atom or a fluorine atom, preferably X ³¹ is a fluorine atom, and X ³¹ and X ³² are Those which are fluorine atoms are preferred, those wherein X ³³ is a fluorine atom, those wherein X ³³ and X ³⁴ are fluorine atoms are preferred, those where X ³⁶ is a fluorine atom are preferred, and X ³⁶ and X ³⁷ are What is a fluorine atom is preferable.

Y ³¹ , Y ³² and Y ³³ are each independently a hydrogen atom, fluorine atom, chlorine atom, cyano group, thiocyanato group, trifluoromethoxy group, trifluoromethyl group, 2,2,2-trifluoroethyl group, difluoro It preferably represents a methoxy group or an alkyl group having 1 to 12 carbon atoms, a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a trifluoromethoxy group, a trifluoromethyl group, a 2,2,2-trifluoroethyl group. Or it is preferable to represent a C1-C12 alkyl group, and it is especially preferable to represent a fluorine atom.

  p, q, r, s and t each independently represent 0, 1 or 2, but q + r and s + t represent 2 or less.

  Of the structures formed by combinations of the above options, —CH═CH—CH═CH—, —C≡C—C≡C— and —CH═CH—C≡C— are preferred from the viewpoint of chemical stability. Absent. Similarly, those in which hydrogen atoms in these structures are replaced by fluorine atoms are also not preferable. Similarly, a structure in which oxygens are combined, a structure in which sulfur atoms are combined, and a structure in which sulfur atoms and oxygen atoms are combined are also not preferable. Similarly, a structure in which nitrogen atoms are bonded to each other, a structure in which nitrogen atoms and oxygen atoms are bonded, and a structure in which nitrogen atoms and sulfur atoms are bonded are also not preferable.

  Specifically, it is preferable to represent a structure represented by the following general formula (IIIa-1).

(Wherein R ³⁴ represents an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms, and L ³⁹ and L ⁴⁰ are each independently a single group. M ³⁸ represents a bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O— or —C≡C—. represents a 1,4-phenylene group or a trans-1,4-cyclohexylene ^{group, X 32} represents a hydrogen atom or a fluorine atom, _{p 1} represents 0 or ^{1, Y 34} is a cyano group, a fluorine atom, a chlorine atom Represents a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group or a trifluoromethoxy group.)
More specifically, the following general formulas (IIIa-2a) to (IIIa-4d)

(In the formula, R ³⁴ represents an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms, and X ³¹ and X ³² are each independently hydrogen. Y ³¹ represents a cyano group, a fluorine atom, a chlorine atom, a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, or a trifluoromethoxy group.

(In the formula, R ³⁴ represents an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, and Y ³¹ represents a cyano group, a fluorine atom, or a chlorine atom. Represents a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group, or a trifluoromethoxy group).

  General formula (IIIb) has the following general formula as a specific structure:

(In the formula, R ³⁵ represents an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, and Y ³⁵ represents a cyano group, a fluorine atom, or a chlorine atom. Represents a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group or a trifluoromethoxy group).
General formula (IIIc) has the following general formula as a specific structure:

(In the formula, R ³⁶ represents an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, and Y ³⁶ represents a cyano group, a fluorine atom, or a chlorine atom. Represents a trifluoromethyl group, a fluoromethoxy group, a difluoromethoxy group or a trifluoromethoxy group.

  It contains at least one compound selected from the group consisting of compounds represented by general formula (IIIa), general formula (IIIb) and general formula (IIIc), preferably 1 to 10 types. It is particularly preferable to contain 8 to 8 species, and the lower limit of the content of the group consisting of the compounds represented by the general formula (IIIa), general formula (IIIb) and general formula (IIIc) is 5% by mass. Preferably, it is 10% by mass, more preferably 20% by mass, and the upper limit is preferably 80% by mass, preferably 70% by mass, preferably 60% by mass, and further preferably 50% by mass.

In the compounds represented by general formula (IVa), general formula (IVb) and general formula (IVc), R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ and R ⁴⁶ are each independently a carbon atom. An alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, a linear alkyl group having 1 to 15 carbon atoms, or an alkenyl group having 2 to 15 carbon atoms (one- CH ₂ — or two or more non-adjacent —CH ₂ — are substituted by —O— or —S—, and one or more hydrogen atoms present in these groups are fluorine. Including those substituted with an atom or a chlorine atom.), Preferably a linear alkyl group having 1 to 10 carbon atoms, a linear alkoxy group having 1 to 10 carbon atoms, or a linear chain having 2 to 10 carbon atoms. An alkenyl group is more preferable and has 1 to 8 carbon atoms. Linear alkyl group or a linear alkoxy group having 1 to 8 carbon atoms is particularly preferred.

M ⁴¹ , M ⁴² , M ⁴³ , M ⁴⁴ , M ⁴⁵ , M ⁴⁶ , M ⁴⁷ , M ⁴⁸ and M ⁴⁹ are independently of each other a trans-1,4-cyclohexylene group (1 present in this group). number of -CH ₂ - or nonadjacent two or more -CH ₂ -. also include those replaced with -O- or -S-), 1,4-phenylene group (present in the group One -CH = or two or more non-adjacent -CH = are replaced by -N =), 1,4-cyclohexenylene group, 1,4-bicyclo [2. 2.2] Octylene, piperidine-2,5-diyl, naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl and decahydronaphthalene-2,6 -Groups represented by diyl groups (hydrogen atoms contained in each group Including those substituted with a cyano group, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom, respectively), a trans-1,4-cyclohexylene group, a 1,4-phenylene group, A 3-fluoro-1,4-phenylene group or a 2,3-difluoro-1,4-phenylene group is more preferred, a trans-1,4-cyclohexylene group or a 1,4-phenylene group is more preferred, and a trans- A 1,4-cyclohexylene group is particularly preferred.

L ⁴¹ , L ⁴² , L ⁴³ , L ⁴⁴ , L ⁴⁵ , L ⁴⁶ , L ⁴⁷ , L ⁴⁸ and L ⁴⁹ are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, — _{OCO -, - COO -, -} OCH 2 -, - CH 2 O -, - OCF 2 -, - CF 2 O- or -C≡C-, more preferably a single _{bond, -CH 2 CH 2 -, -} (CH _{2) 4 -, - OCH 2} -, - CH 2 O -, - OCF 2 -, - CF 2 O- or -C≡C- is more preferred.

X ⁴¹ , X ⁴² , X ⁴³ , X ⁴⁴ , X ⁴⁵ , X ⁴⁶ , X ⁴⁷ and X ⁴⁸ each independently represent a hydrogen atom, a trifluoromethyl group, a trifluoromethoxy group, a chlorine atom or a fluorine atom, preferably has X ⁴² is a fluorine atom is ^preferably a ^{X 41} and ^{X 42} is a fluorine atom is ^preferably a ^{X 41} is a chlorine atom and ^{X 42} is a fluorine atom ^{and X 43} is a fluorine atom X ⁴³ and X ⁴⁴ are preferably fluorine atoms, X ⁴³ and X ⁴⁵ are preferably fluorine atoms, X ⁴³ , X ⁴⁴ and X ⁴⁵ are preferably fluorine atoms, and X ⁴⁶ Is preferably a fluorine atom, and X ⁴⁷ and X ⁴⁸ are preferably fluorine atoms.

G represents a methylene group or —O—, and —O— is preferable.
u, v, w, x, y and z each independently represent 0, 1 or 2, and u + v, w + x and y + z are preferably 2 or less.

  Of the structures formed by combinations of the above options, —CH═CH—CH═CH—, —C≡C—C≡C— and —CH═CH—C≡C— are preferred from the viewpoint of chemical stability. Absent. Similarly, those in which hydrogen atoms in these structures are replaced by fluorine atoms are also not preferable. Similarly, a structure in which oxygens are combined, a structure in which sulfur atoms are combined, and a structure in which sulfur atoms and oxygen atoms are combined are also not preferable. Similarly, a structure in which nitrogen atoms are bonded to each other, a structure in which nitrogen atoms and oxygen atoms are bonded, and a structure in which nitrogen atoms and sulfur atoms are bonded are also not preferable.

  In the compound represented by the general formula (IVa), specifically, a structure represented by the following general formula (IVa-1) is preferably represented.

(Wherein R ⁴⁷ and R ⁴⁸ each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, L ⁵⁰ , L ⁵¹ and L ⁵² are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O— or — C≡C—, M ⁵⁰ represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group, and u ₁ and v ₁ each independently represent 0 or 1.)
More specifically, the following general formula (IVa-2a) to general formula (IVa-3k)

(Wherein, R ⁴⁷ and R ⁴⁸ each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms). In which R ⁴⁷ and R ⁴⁸ are independently of each other an alkyl group having 1 to 8 carbon atoms or an alkoxyl group having 1 to 8 carbon atoms.

  In the compound represented by the general formula (IVb), specifically, it is preferable to represent a structure represented by the following general formula (IVb-1).

(In the formula, R ⁴⁹ and R ⁵⁰ each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms, L ⁵² , L ⁵³ and L ⁵⁴ are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O— or — C≡C—, M ⁵¹ , M ⁵² and M ⁵³ represent 1,4-phenylene group or trans-1,4-cyclohexylene group, and w1 and x1 independently represent 0, 1 or 2. , W1 + x1 represents 2 or less.)
More specifically, the following general formulas (IVb-2a) to (IVb-3f)

(In the formula, R ⁴⁹ and R ⁵⁰ each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms). The structure is preferable.

  In the compound represented by the general formula (IVc), specifically, it is preferable to represent a structure represented by the following general formula (IVc-1a) and general formula (IVc-1b).

(Wherein R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, L ⁵⁶ , L ⁵⁷ and L ⁵⁸ are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O— or — C≡C—, M ⁵⁴ , M ⁵⁵ and M ^{56 each} represent a 1,4-phenylene group or a trans-1,4-cyclohexylene group, and y 1 and z 1 independently represent 0, 1 or 2. Y1 + z1 represents 2 or less.)
More specifically, the following general formulas (IVc-2a) to (IVc-2g)

(In the formula, R ⁵¹ and R ⁵² each independently represent an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms.)
A compound selected from the group consisting of compounds represented by general formula (IIIa), general formula (IIIb) and general formula (IIIc) used as the third component, or general formula (IVa), general formula (IVb) and general formula It contains at least one compound selected from the group consisting of the compounds represented by (IVc), but preferably contains 2 to 10 types, particularly preferably 2 to 8 types, The lower limit is preferably 5% by mass, more preferably 10% by mass, more preferably 20% by mass, the upper limit is preferably 80% by mass, and is 70% by mass. Is preferable, 60 mass% is preferable, and 50 mass% is preferable.

  Polymerizable compound represented by general formula (I), compound represented by general formula (II), and compounds represented by general formulas (IIIa) to (IIIc) included in the present polymerizable compound-containing liquid crystal composition And the compounds represented by the general formulas (IVa) to (IVc) do not take a partial structure in which heteroatoms such as —O—O—, —O—S—, and —S—S— are directly bonded to each other. .

  In the liquid crystal composition of the present invention, Δn is preferably in the range of 0.08 to 0.25.

  In the liquid crystal composition of the present invention, Δε having a positive or negative Δε can be used depending on the display mode of the liquid crystal display element. In the MVA mode liquid crystal display element, a liquid crystal composition having a negative Δε is used. In that case, Δε is preferably −1 or less, and more preferably −2 or less.

  The liquid crystal composition of the present invention has a wide liquid crystal phase temperature range (absolute value of the difference between the liquid crystal phase lower limit temperature and the liquid crystal phase upper limit temperature), but the liquid crystal phase temperature range is preferably 100 ° C or higher, and 120 ° C or higher. Is more preferable. The upper limit temperature of the liquid crystal phase is preferably 70 ° C. or higher, and more preferably 80 ° C. or higher. Furthermore, the lower limit temperature of the liquid crystal phase is preferably −20 ° C. or lower, and more preferably −30 ° C. or lower.

  The liquid crystal composition of the present invention may contain a normal nematic liquid crystal, a smectic liquid crystal, a cholesteric liquid crystal and the like in addition to the above compounds.

  The liquid crystal composition containing the polymerizable compound of the present invention is polymerized even when no polymerization initiator is present, but may contain a polymerization initiator in order to accelerate the polymerization. Examples of the polymerization initiator include benzoin ethers, benzophenones, acetophenones, benzyl ketals, acylphosphine oxides, and the like.

  In order to improve the storage stability of the liquid crystal composition of the present invention, a stabilizer may be added. Examples of the stabilizer that can be used include hydroquinones, hydroquinone monoalkyl ethers, tert-butylcatechols, pyrogallols, thiophenols, nitro compounds, β-naphthylamines, β-naphthols, nitroso compounds, and the like. It is done. The addition amount in the case of using a stabilizer is preferably in the range of 0.005 to 1% by mass, more preferably 0.02 to 0.5% by mass, and 0.03 to 0.1% by mass with respect to the liquid crystal composition. % Is particularly preferred.

  The liquid crystal composition of the present invention is used for a liquid crystal display element that is provided with liquid crystal alignment ability by polymerization of a polymerizable compound in the liquid crystal composition and controls the amount of light transmitted using the birefringence of the liquid crystal composition. Is done. As liquid crystal display elements, AM-LCD (active matrix liquid crystal display element), TN (nematic liquid crystal display element), STN-LCD (super twisted nematic liquid crystal display element), OCB-LCD and IPS-LCD (in-plane switching liquid crystal display element) However, it is particularly useful for AM-LCDs, and can be used for transmissive or reflective liquid crystal display elements.

  The two substrates of the liquid crystal cell used in the liquid crystal display element can be made of a transparent material having flexibility such as glass or plastic, and one of them can be an opaque material such as silicon. A transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.

  The color filter can be prepared by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method. A method for producing a color filter by a pigment dispersion method will be described as an example. A curable coloring composition for a color filter is applied on the transparent substrate, subjected to patterning treatment, and cured by heating or light irradiation. By performing this process for red, green, blue, and / or other colors, a pixel portion for a color filter can be created. In addition, a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.

  As a method for sandwiching the polymer-stabilized liquid crystal composition between the two substrates, a normal vacuum injection method or an ODF method can be used. First, the said board | substrate is made to oppose so that a transparent electrode layer may become an inner side. In that case, you may adjust the space | interval of a board | substrate through a spacer. At this time, it is preferable to adjust so that the thickness of the light control layer obtained may be set to 1-100 micrometers. More preferably, the thickness is 1.5 to 10 μm. When a polarizing plate is used, it is preferable to adjust the product of the refractive index anisotropy Δn of the liquid crystal and the cell thickness d so that the contrast is maximized. In addition, when there are two polarizing plates, the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good. Furthermore, a retardation film for widening the viewing angle can also be used. Examples of the spacer include glass particles, plastic particles, alumina particles, and a photoresist material. Thereafter, a sealing agent such as a thermosetting or photosensitive composition can be used by an appropriate method according to the injection method, and the substrates can be sealed with a constant spacing.

  As a method for polymerizing a polymerizable compound, since rapid progress of polymerization is desirable, a method of polymerizing by irradiating active energy rays such as ultraviolet rays or electron beams is preferable. When ultraviolet rays are used, a polarized light source or a non-polarized light source may be used. Further, when the polymerization is carried out with the liquid crystal composition sandwiched between two substrates, at least the substrate on the irradiation surface side must be given appropriate transparency to the active energy rays. Moreover, after polymerizing only a specific part using a mask during light irradiation, the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization. In particular, when ultraviolet exposure is performed, it is preferable to perform ultraviolet exposure while applying an alternating electric field to the polymerizable compound-containing liquid crystal composition. The alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 50 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In the MVA mode liquid crystal display element, the pretilt angle is preferably controlled from 80 degrees to 89 degrees from the viewpoint of alignment stability and contrast.

The temperature during irradiation is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically at a temperature of 15 to 35 ° C. As a lamp for generating ultraviolet rays, a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used. Moreover, as a wavelength of the ultraviolet-ray to irradiate, it is preferable to cut and use an ultraviolet-ray as needed. Intensity of ultraviolet irradiation is ^preferably from ^{0.1mW / cm 2 ~100W / cm 2} , 2mW / cm 2 ~50W / cm 2 is more preferable. The amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm ² to 500 J / cm ^{2, and} more preferably 100 mJ / cm ² to 200 J / cm ² . When irradiating with ultraviolet rays, the intensity may be changed. The time for irradiation with ultraviolet rays is appropriately selected depending on the intensity of the ultraviolet rays to be irradiated, but is preferably 10 seconds to 3600 seconds.

  EXAMPLES Hereinafter, although an Example is given and this invention is further explained in full detail, this invention is not limited to these Examples. Further, “%” in the compositions of the following Examples and Comparative Examples means “% by mass”.

The physical properties of the liquid crystal composition are expressed as follows.
T _N-I (° C.): Nematic phase-isotropic liquid phase transition temperature (liquid crystal phase upper limit temperature)
Δε: dielectric anisotropy Δn: refractive index anisotropy Vth (V): applied voltage (threshold voltage) at which the transmittance changes by 10% when a rectangular wave having a frequency of 1 kHz is applied
(Measurement method of residual amount of monomer after UV curing)
After injecting the liquid crystal composition into the liquid crystal cell, UV is irradiated to polymerize the polymerizable compound. Thereafter, the liquid crystal cell is disassembled to obtain an acetonitrile solution of an elution component containing a liquid crystal material, a polymer, and an unpolymerized polymerizable compound. The peak area of each component is measured by high performance liquid chromatography (column: reverse phase nonpolar column, developing solvent: acetonitrile or acetonitrile / water, detector: UV detector). The amount of the remaining polymerizable compound was determined from the peak area ratio of the liquid crystal material as an index and the peak area ratio of the unpolymerized polymerizable compound. The residual monomer amount was determined from this value and the amount of the polymerizable compound initially added. The detection limit of the remaining amount of the polymerizable compound was 500 ppm.
(Burn-in evaluation method)
A voltage was applied to the liquid crystal display element after polymerization so as to form a black and white checker pattern, and a luminance change state was visually observed when a halftone display was performed for each elapsed time.
Example 1
A liquid crystal composition LC-1 containing a compound selected from general formula (II), a compound selected from general formula (IVa), general formula (IVb) and general formula (IVc) was prepared. The constituent compounds and the ratios contained are as follows.

Table 1 shows the physical properties of the liquid crystal composition LC-1.

  For the liquid crystal composition LC-1 99.7%, the formula (I-35-a)

A polymerizable compound-containing liquid crystal composition CLC-1 was prepared by adding 0.3% of the polymerizable compound represented by formula (II) and uniformly dissolving the compound. The physical properties of CLC-1 were not different from those of the above LC-1. For this reason, it turned out that the polymeric compound represented by a formula (I-35-a) does not reduce the liquid crystal property of the liquid crystal composition to add. Further, although this CLC-1 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by the formula (I-35-a) has compatibility with other liquid crystal compounds. I found it excellent.

CLC-1 was injected by a vacuum injection method into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle (crystal rotation method) of this cell, the liquid crystal cell was irradiated with ultraviolet light by a high-pressure mercury lamp through a filter that cuts ultraviolet light of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. . The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. Table 2 shows the pretilt angle of the element before and after UV irradiation and the electro-optical characteristics of the element.

上記のプレチルト角の結果から、重合性化合物が重合することにより液晶組成物に対する配向規制力が生じており、液晶分子が初期状態から２．６度傾いた状態でプレチルト角を固定化された垂直配向性液晶表示素子を得ることがわかった。

From the result of the above pretilt angle, the polymerizable compound is polymerized to produce an alignment regulating force on the liquid crystal composition, and the vertical angle in which the pretilt angle is fixed while the liquid crystal molecules are tilted 2.6 degrees from the initial state. It was found that an alignment liquid crystal display element was obtained.

Further, the content of the polymerizable compound represented by the unpolymerized formula (I-35-a) contained in the element was analyzed by liquid chromatographic analysis, but was not detected. Thereby, it was confirmed that the polymerizable compound represented by the formula (I-35-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is below the detection limit. .
(Comparative Example 1)
For the liquid crystal composition LC-1 99.7%, the formula (A)

A polymerizable compound-containing liquid crystal composition CLC-A was prepared by adding 0.3% of the polymerizable compound represented by formula (II) and uniformly dissolving the compound. CLC-A was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the device was 89.6 degrees, whereas the pretilt angle after the irradiation was 87.4 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. It was. However, as a result of analyzing the content of the polymerizable compound represented by the unpolymerized formula (A) contained in the device by liquid chromatographic analysis, it became 1200 ppm, and the polymerization of the polymerizable compound (A) was completely completed. Was not progressing. Moreover, since precipitation occurred as a result of storing this CLC-A in a cold place (−20 ° C.) for one week, it was found that the polymerizable compound represented by the formula (A) was inferior in compatibility with other liquid crystal compounds. .
(Example 2)
Polymerizable compound-containing liquid crystal composition CLC-2 by adding 0.5% of the polymerizable compound represented by the formula (I-35-a) to 99.5% of the liquid crystal composition LC-1 and uniformly dissolving it. Was prepared. It was found that the polymerizable compound represented by the formula (I-35-a) does not deteriorate the liquid crystal properties of the liquid crystal composition added in the same manner as in Example 1. Further, although this CLC-2 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by (I-35-a) was excellent in compatibility with other liquid crystal compounds. I found out.

CLC-2 was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the device was 89.7 degrees, whereas the pretilt angle after the irradiation was 86.1 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. . The content of the polymerizable compound represented by the unpolymerized formula (I-35-a) contained in the device was analyzed by liquid chromatographic analysis, but was below the detection limit. Thereby, it was confirmed that the polymerizable compound represented by the formula (I-35-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is below the detection limit. .
(Example 3)
With respect to 99.7% of liquid crystal composition LC-1, the formula (I-33-a)

で示される重合性化合物を０．３％添加し均一溶解することにより重合性化合物含有液晶組成物ＣＬＣ−３を調製した。式（Ｉ−３３−ａ）で表される重合性化合物は、実施例１で示した式（Ｉ−３５−ａ）で表される重合性化合物と同様に液晶性を低下させず、相溶性にも優れていることがわかった。また、このＣＬＣ−３を１週間冷所（−２０℃）に保存したが析出等は起こらず、式（Ｉ−３３−ａ）で表される重合性化合物は他の液晶化合物との相溶性が優れていることがわかった。

A polymerizable compound-containing liquid crystal composition CLC-3 was prepared by adding 0.3% of the polymerizable compound represented by formula (II) and uniformly dissolving the compound. The polymerizable compound represented by the formula (I-33-a) is compatible with the polymerizable compound represented by the formula (I-35-a) shown in Example 1 without reducing liquid crystallinity. It was also found to be excellent. Further, although this CLC-3 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by the formula (I-33-a) is compatible with other liquid crystal compounds. Was found to be excellent.

CLC-3 was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the device was 89.6 degrees, whereas the pretilt angle after the irradiation was 86.4 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. It was. The content of the polymerizable compound represented by the unpolymerized formula (I-33-a) contained in the device was analyzed by liquid chromatographic analysis, but was below the detection limit. This confirms that the polymerizable compound represented by the formula (I-33-a) can be polymerized without using a polymerization initiator, and that the unpolymerized product remaining after the polymerization is below the detection limit. did.
Example 4
For the liquid crystal composition LC-1 99.7%, the formula (I-11-a)

で示される重合性化合物を０．３％添加し均一溶解することにより重合性化合物含有液晶組成物ＣＬＣ−４を調製した。式（Ｉ−１１−ａ）で表される重合性化合物は、実施例１で示した式（Ｉ−３５−ａ）で表される重合性化合物と同様に液晶性を低下させず、相溶性にも優れていることがわかった。また、このＣＬＣ−４を１週間冷所（−２０℃）に保存したが析出等は起こらず、式（Ｉ−１１−ａ）で表される重合性化合物は他の液晶化合物との相溶性が優れていることがわかった。

A polymerizable compound-containing liquid crystal composition CLC-4 was prepared by adding 0.3% of the polymerizable compound represented by formula (II) and uniformly dissolving the compound. The polymerizable compound represented by the formula (I-11-a) is compatible with the polymerizable compound represented by the formula (I-35-a) shown in Example 1 without reducing liquid crystallinity. It was also found to be excellent. Further, although this CLC-4 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by the formula (I-11-a) was compatible with other liquid crystal compounds. Was found to be excellent.

CLC-4 was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the device was 89.8 degrees, whereas the pretilt angle after the irradiation was 86.9 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. It was. The content of the polymerizable compound represented by the unpolymerized formula (I-11-a) contained in the element was analyzed by liquid chromatographic analysis, but was below the detection limit. Thereby, the polymerizable compound represented by the formula (I-11-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is confirmed to be below the detection limit. did.
(Example 5)
As an example containing a compound selected from general formula (II), a compound selected from general formula (IVa), general formula (IVb) and general formula (IVc), a liquid crystal composition LC-2 having the following components was used. Prepared.

Table 3 shows the physical properties of the liquid crystal composition LC-2.

  Polymerizable compound-containing liquid crystal composition CLC-5 is obtained by adding 0.3% of the polymerizable compound represented by the formula (I-35-a) to 99.7% of the liquid crystal composition LC-2 and uniformly dissolving it. Was prepared. As in Example 1, it was found that the polymerizable compound represented by the formula (I-35-a) did not deteriorate the liquid crystallinity and was excellent in compatibility. Further, although this CLC-5 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by the formula (I-35-a) has compatibility with other liquid crystal compounds. I found it excellent.

CLC-5 was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the device was 89.7 degrees, whereas the pretilt angle after the irradiation was 86.7 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. It was. The content of the polymerizable compound represented by the unpolymerized formula (I-35-a) contained in the element was analyzed by liquid chromatographic analysis, but was below the detection limit. As a result, it was confirmed that the polymerizable compound represented by the formula (I-35-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is below the detection limit. did.
(Example 6)
As an example containing a compound selected from the general formula (II), a compound selected from the general formula (IVa), the general formula (IVb), and the general formula (IVc), a liquid crystal composition LC-3 having the following components is used. Prepared.

Table 4 shows the physical properties of the liquid crystal composition LC-3.

  A polymerizable compound-containing liquid crystal composition CLC-6 is obtained by adding 0.3% of the polymerizable compound represented by the formula (I-35-a) to 99.7% of the liquid crystal composition LC-3 and uniformly dissolving it. Was prepared. As in Example 1, it was found that the polymerizable compound represented by the formula (I-35-a) did not deteriorate the liquid crystallinity and was excellent in compatibility. Further, although this CLC-6 was stored in a cold place (−20 ° C.) for 1 week, no precipitation or the like occurred, and the polymerizable compound represented by the formula (I-35-a) has compatibility with other liquid crystal compounds. I found it excellent.

CLC-6 was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the device was 89.7 degrees, whereas the pretilt angle after the irradiation was 86.7 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. It was. The content of the polymerizable compound represented by the unpolymerized formula (I-35-a) contained in the element was analyzed by liquid chromatographic analysis, but was below the detection limit. As a result, it was confirmed that the polymerizable compound represented by the formula (I-35-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is below the detection limit. did.
(Example 7)
As an example containing a compound selected from general formula (II), a compound selected from general formula (IVa), general formula (IVb) and general formula (IVc), a liquid crystal composition LC-4 having the following components was used. Prepared.

Table 5 shows the physical properties of the liquid crystal composition LC-4.

  A polymerizable compound-containing liquid crystal composition CLC-7 is obtained by adding 0.3% of the polymerizable compound represented by the formula (I-35-a) to 99.7% of the liquid crystal composition LC-4 and uniformly dissolving the compound. Was prepared. As in Example 1, it was found that the polymerizable compound represented by the formula (I-35-a) did not deteriorate the liquid crystallinity and was excellent in compatibility. Further, although this CLC-7 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by the formula (I-35-a) has compatibility with other liquid crystal compounds. I found it excellent.

CLC-7 was injected by vacuum injection into a cell with ITO coated with a polyimide alignment film that induces homeotropic alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the element was 89.5 degrees, whereas the pretilt angle after the irradiation was 86.5 degrees, and the pretilt angle was fixed while the liquid crystal molecules were tilted from the initial state. It was. The content of the polymerizable compound represented by the unpolymerized formula (I-35-a) contained in the element was analyzed by liquid chromatographic analysis, but was below the detection limit. As a result, it was confirmed that the polymerizable compound represented by the formula (I-35-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is below the detection limit. did.
(Example 8)
Liquid crystal composition having the following components as an example containing a compound selected from general formula (II), a compound selected from general formula (IIIa), general formula (IIIb) and a compound selected from general formula (IIIc) LC-5 was prepared.

Table 6 shows the physical properties of the liquid crystal composition LC-5.

  A polymerizable compound-containing liquid crystal composition CLC-8 is obtained by adding 0.3% of the polymerizable compound represented by the formula (I-35-a) to 99.7% of the liquid crystal composition LC-5 and uniformly dissolving the compound. Was prepared. As in Example 1, it was found that the polymerizable compound represented by the formula (I-35-a) did not deteriorate the liquid crystallinity and was excellent in compatibility. Further, although this CLC-8 was stored in a cold place (−20 ° C.) for 1 week, precipitation or the like did not occur, and the polymerizable compound represented by the formula (I-35-a) has compatibility with other liquid crystal compounds. I found it excellent.

CLC-8 was injected by a vacuum injection method into a cell with ITO coated with a polyimide alignment film that induces parallel alignment with a cell gap of 3.5 μm. After measuring the pretilt angle of this cell, the liquid crystal cell was irradiated with ultraviolet rays by a high-pressure mercury lamp through a filter that cuts ultraviolet rays of 320 nm or less while applying a rectangular wave of 1.8 V at a frequency of 1 kHz. The cell surface was adjusted to have an irradiation intensity of 15 mW / cm ² and irradiated for 600 seconds to obtain a vertically aligned liquid crystal display element in which the polymerizable compound in the polymerizable compound-containing liquid crystal composition was polymerized. The pretilt angle before the ultraviolet irradiation of the element was 0.3 degrees, whereas the pretilt angle after irradiation was 2.9 degrees, and the pretilt angle was given while the liquid crystal molecules were tilted from the initial state. It was fixed. The content of the polymerizable compound represented by the unpolymerized formula (I-35-a) contained in the element was analyzed by liquid chromatographic analysis, but was below the detection limit. As a result, it was confirmed that the polymerizable compound represented by the formula (I-35-a) can be polymerized without using a polymerization initiator, and the unpolymerized product remaining after the polymerization is below the detection limit. did.
(Example 9 and Comparative Example 2)
A voltage was applied to the liquid crystal display elements after polymerization prepared in Examples 1 to 8 and Comparative Example 1, and the elapsed time and the state of image sticking were visually observed. (○ indicates that no change is observed. × indicates burn-in, and the greater the number of ×, the worse the degree.)

比較例１で作製した液晶表示素子は表示後４８時間で焼き付きが発生し、１６８時間後には、ほぼ全面に渡り表示不良が見られた。これに対し実施例１〜８で作製した液晶表示素子では、５００時間経過後でも、良好な表示状態を維持した。これにより、本願発明化合物のように重合性材料がすべて重合し消費された液晶表示素子の高い信頼性が確認でき、また配向規制力の低下も起こらずポリマーが十分大きな剛直性を有していることがわかった。

The liquid crystal display device manufactured in Comparative Example 1 burned in 48 hours after display, and display defects were observed over almost the entire surface after 168 hours. On the other hand, in the liquid crystal display element produced in Examples 1-8, the favorable display state was maintained even after 500 hours passed. As a result, it is possible to confirm the high reliability of the liquid crystal display element in which all the polymerizable material is polymerized and consumed, such as the compound of the present invention, and the polymer has sufficiently high rigidity without causing a decrease in the alignment regulating force. I understood it.

Claims (10)

As the first component, the general formula (I)

(In the formula, R ¹¹ , R ¹² , R ¹³ and R ¹⁴ are each independently the following formulas (R-1) to (R-15):

Any one of
S ¹¹ , S ¹² , S ¹³ and S ¹⁴ each independently represents an alkylene group having 1 to 12 carbon atoms or a single bond, and one —CH ₂ — in the alkylene group or two or more not adjacent to each other —CH ₂ — may be replaced by —O—, —COO—, —OCO— or —OCOO—,
Z ¹¹ and Z ¹² each independently represent a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group, a thiocyanato group, a trifluoromethoxy group, a trifluoromethyl group, a difluoromethoxy group, or an alkyl group having 1 to 12 carbon atoms. In the alkyl group, one —CH ₂ — or two or more non-adjacent —CH ₂ — represents an oxygen atom, a sulfur atom, —CO—, —COO—, —OCO—, —OCOO—, — CH = CH— or —C≡C— may be substituted, or Z ¹¹ and Z ¹² may be independently of each other R ¹⁵ —S ¹⁵ — (wherein R ¹⁵ represents the same meaning as R ¹¹ , S ¹⁵ represents the same meaning as ^{S 11, Z 11} and ^{Z 12} are both ^R 15 ^{-S 15} - to represent the can, even if ^{R 15} and / or ^{S 15} there are multiple different be the same Good.)
L ¹¹ , L ¹² and L ¹³ are each independently a single bond, —O—, —S—, —CH ₂ —, —OCH ₂ —, —CH ₂ O—, —CO—, —C ₂ H ₄ —. _{, -COO -, - OCO -,} - OCOOCH 2 -, - CH 2 OCOO -, - CO-NR a -, - NR a -CO -, - SCH 2 -, - CH 2 S -, - CH = CR a ^{-COO -, - CH = CR a} -OCO -, - COO-CR a = CH -, - OCO-CR a = CH -, - COO-CR a = CH-COO -, - COO-CR a = CH- ^{OCO -, - OCO-CR a} = CH-COO -, - OCO-CR a = CH-OCO -, - COOC 2 H 4 -, - OCOC 2 H 4 -, - C 2 H 4 OCO -, - C 2 _{H 4 COO -, - CH 2} COO -, - CH 2 OCO -, - COOCH _{-, - OCOCH 2 -, -} CH = CH -, - CF = CF -, - CF = CH -, - CH = CF -, - CF 2 -, - CF 2 O -, - OCF 2 -, - CF 2 CH ₂ —, —CH ₂ CF ₂ —, —CF ₂ CF ₂ — or —C≡C— (wherein, R ^a each independently represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms). Wherein at least one of L ¹¹ , L ¹² and L ¹³ present in the molecule is —COO—, —CH═CH—COO—, —CH═CH—OCO—, —CH═CCH ₃ —COO. _{-, - CH = CCH 3 -OCO} -, - C 2 H 4 -COO -, - C 2 H 4 -OCO -, - CH 2 -COO- or an _-CH 2 -OCO-,
M ¹¹ and M ¹² are each independently 1,4-phenylene group, 1,4-cyclohexylene group, pyridine-2,5-diyl group, pyrimidine-2,5-diyl group, naphthalene-2,6-diyl. Group, indane-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or 1,3-dioxane-2,5-diyl group, M ¹¹ and M ¹² Are each independently unsubstituted or an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, and an alkyl group having 1 to 12 carbon atoms. May be substituted with a halogenated alkoxy group, halogen, cyano group or nitro group,
m ¹¹ , m ¹² , m ¹³ and m ¹⁴ each independently represents 0 or 1, but when m ¹¹ , m ¹² , m ¹³ and / or m ¹⁴ represents 0 (R ¹¹ -S ¹¹ ) _{0 ^{-, (R 12 -S 12)}} 0 -, (R 13 -S 13) 0 -, (R 14 -S 14) 0 - and / or _{^{(R 15 -S 15) 0 -}} , represents a hydrogen atom,
^{m 11 + m 12 + m 13} + m 14 each represents 1, 2, 3 or ^{4, Z 11} and ^{Z 12} are both ^R 15 ^{-S 15} - if it represents a ^{non-m 11 + m 12 + m 13} + m 14 is 3 or 4 the ^{stands, Z 11} or only one of ^{Z 12} is ^R 15 ^{-S 15} - if it represents an ^{m 11 + m 12 + m 13} + m 14 represents 2, 3 or ^{4, Z 11} and ^{Z 12} are both ^{R 15} - When representing S ^15-, m ¹¹ + m ¹² + m ¹³ + m ¹⁴ represents 1, 2, 3 or 4;
n ¹¹ and n ¹² each independently represent 0, 1 or 2, but n ¹¹ + n ¹² represents 0, 1 or 2, and when n ¹¹ and / or n ¹² represents 2, a plurality of M ¹¹ , M ¹² , L ¹¹ and / or L ¹³ may be the same or different. ) Containing one or more polymerizable compounds represented by the general formula (II)

(In the formula, R ²¹ and R ²² each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one —CH ₂ — present in these groups. Or two or more non-adjacent —CH ₂ — may be substituted with —O— or —S—, and one or more hydrogen atoms present in these groups are fluorine atoms or chlorine May be substituted with atoms,
M ²¹ , M ²² and M ²³ are each independently (a) a trans-1,4-cyclohexylene group (one —CH ₂ — present in this group or two or more non-adjacent — CH ₂ — may be replaced by —O— or —S—),
(B) a 1,4-phenylene group (one —CH═ present in the group or two or more non-adjacent —CH═ may be replaced by —N═), 2-fluoro- 1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group and (c) 1,4-cyclohexenylene group, 1,4-bicyclo [2 2.2] Octylene group, piperidine-2,5-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group and 1,2,3,4-tetrahydronaphthalene-2, Represents a group selected from the group consisting of 6-diyl groups,
o represents 0, 1 or 2;
L ²¹ and L ²² are each independently a single bond, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O—, —CH═CH—, —CH═N—N═CH— or —C≡C—, when a plurality of L ²² are present, they may be the same or different, and a plurality of M ²³ are present. In some cases, they may be the same or different. 1) or two or more compounds represented by formula (III), and the general formula (IIIa), general formula (IIIb) and general formula (IIIc) are used as the third component.

(Wherein R ³¹ , R ³² and R ³³ each independently represents an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one —CH present in these groups) ₂ or two or more non-adjacent —CH ₂ — may be substituted with —O— or —S—, and one or more hydrogen atoms present in these groups are fluorine atoms. Or it may be substituted with a chlorine atom,
M ³¹ , M ³² , M ³³ , M ³⁴ , M ³⁵ , M ³⁶ , M ³⁷ and M ³⁸ are independent of each other,
(D) trans-1,4-cyclohexylene group (the one present in the group -CH ₂ - or nonadjacent two or more -CH ₂ - is replaced by -O- or -S- May be)
(E) 1,4-phenylene group (one —CH═ present in this group or two or more non-adjacent —CH═ may be replaced by —N═), 3-fluoro- 1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, and
(F) 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-2,5-diyl group, naphthalene-2,6-diyl group, 1,2,3 , 4-tetrahydronaphthalene-2,6-diyl group and decahydronaphthalene-2,6-diyl group are selected from the group consisting of the above group (d), group (e) or group (f). Each hydrogen atom contained may be substituted with a cyano group, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom,
L ³¹ , L ³² , L ³³ , L ³⁴ , L ³⁵ , L ³⁶ , L ³⁷ and L ³⁸ are each independently a single bond, —COO—, —OCO—, —CH ₂ CH ₂ —, — (CH _{2 ) 4 -, - OCH 2 -} , - CH 2 O -, - OCF 2 -, - CF 2 O- or represents ^{-C≡C-, M 32, M 34,} M 35, M 37, M 38, L ^When there are a plurality of ³¹ , L ³³ , L ³⁵ , L ³⁶ and / or L ³⁸ , they may be the same or different,
X ³¹ , X ³² , X ³³ , X ³⁴ , X ³⁵ , X ³⁶ and X ³⁷ each independently represent a hydrogen atom or a fluorine atom,
Y ³¹ , Y ³² and Y ³³ are each independently a fluorine atom, chlorine atom, cyano group, thiocyanato group, trifluoromethoxy group, trifluoromethyl group, 2,2,2-trifluoroethyl group or difluoromethoxy group. Represent,
p, q, r, s and t each independently represent 0, 1 or 2, but q + r and s + t are 2 or less. Or a compound selected from the group consisting of compounds represented by formula (IVa), general formula (IVb) and general formula (IVc)

(Wherein R ⁴¹ , R ⁴² , R ⁴³ , R ⁴⁴ , R ⁴⁵ and R ⁴⁶ each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one -CH 2 present in the radical _- or nonadjacent two or more -CH 2 _- may be substituted by -O- or -S-, also present in the group 1 One or more hydrogen atoms may be substituted with fluorine atoms or chlorine atoms,
M ⁴¹ , M ⁴² , M ⁴³ , M ⁴⁴ , M ⁴⁵ , M ⁴⁶ , M ⁴⁷ , M ⁴⁸ and M ⁴⁹ are independent of each other,
(G) trans-1,4-cyclohexylene group (the one present in the group -CH ₂ - or nonadjacent two or more -CH ₂ - is replaced by -O- or -S- May be)
(H) a 1,4-phenylene group (one -CH = present in the group or two or more non-adjacent -CH = may be replaced by -N =), and
(I) 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-2,5-diyl group, naphthalene-2,6-diyl group, 1,2,3 , 4-tetrahydronaphthalene-2,6-diyl group and decahydronaphthalene-2,6-diyl group are selected from the group consisting of the group (g), group (h) or group (i). Each hydrogen atom contained may be substituted with a cyano group, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group or a chlorine atom,
L ⁴¹ , L ⁴² , L ⁴³ , L ⁴⁴ , L ⁴⁵ , L ⁴⁶ , L ⁴⁷ , L ⁴⁸ and L ⁴⁹ are each independently a single bond, —COO—, —OCO—, —CH ₂ CH ₂ —, — (CH ₂ ) ₄ —, —OCH ₂ —, —CH ₂ O—, —OCF ₂ —, —CF ₂ O— or —C≡C— represents M ⁴² , M ⁴³ , M ⁴⁵ , M ⁴⁶ , M ⁴⁸ , M ⁴⁹ , L ⁴¹ , L ⁴³ , L ⁴⁴ , L ⁴⁶ , L ⁴⁷ and / or a plurality of L ⁴⁹ , they may be the same or different,
X ⁴¹ , X ⁴² , X ⁴³ , X ⁴⁴ , X ⁴⁵ , X ⁴⁶ , X ⁴⁷ and X ⁴⁸ each independently represent a hydrogen atom, a trifluoromethyl group, a trifluoromethoxy group, a chlorine atom or a fluorine atom, Any one of X ⁴¹ and X ⁴² represents a fluorine atom, any one of X ⁴³ , X ⁴⁴ and X ⁴⁵ represents a fluorine atom, and any one of X ⁴⁶ , X ⁴⁷ and X ⁴⁸ represents fluorine. X ⁴⁶ and X ⁴⁷ do not represent a fluorine atom at the same time, and X ⁴⁶ and X ⁴⁸ do not represent a fluorine atom at the same time,
G represents —CH ₂ — or —O—;
u, v, w, x, y and z each independently represent 0, 1 or 2, but u + v, w + x and y + z are 2 or less. A polymerizable compound-containing liquid crystal composition containing one or more compounds selected from the group consisting of compounds represented by formula (1): In the general formula (I), it is assumed that at least one of S ¹¹ , S ¹² , S ¹³ , S ¹⁴ and S ¹⁵ is such that oxygen atoms are not directly bonded to each other, the methylene group in the alkylene group is —O—, —COO— 2. The liquid crystal composition according to claim 1, wherein the liquid crystal composition represents an alkylene group having 2 to 12 carbon atoms which may be replaced by —OCO— or —OCOO—. In general formula (I), R < ¹¹ >, R < ¹² >, R <^13> , R <^14> and R < ¹⁵ > each independently represents formula (R-1) or (R-2). The polymerizable compound-containing liquid crystal composition described. 4. The polymerizable compound-containing liquid crystal composition according to claim 1, wherein the sum of n ¹¹ and n ¹² is 0 or 1 in the general formula (I). In General Formula (I), M ¹¹ and M ¹² are each independently unsubstituted or an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, and 1 carbon atom. Represents a 1,4-phenylene group or a naphthalene-2,6-diyl group, which may be substituted with an alkoxy group of ˜12, a halogenated alkoxy group of 1 to 12 carbon atoms, a halogen, a cyano group or a nitro group. The polymerizable compound-containing liquid crystal composition according to any one of claims 1, 2, 3, or 4. A liquid crystal having a structure in which a liquid crystal is sandwiched between a pair of substrates, having at least a transparent electrode and a polarizing plate, and imparting liquid crystal alignment ability by polymerizing a polymerizable compound contained in the liquid crystal composition. The polymerizable compound-containing liquid crystal composition according to claim 1, which is used for a display element. 0.01 to 2% by mass of a compound selected from general formula (I), 5 to 70% by mass of a compound selected from general formula (II), and general formula (IIIa), general formula (IIIb) or general formula 5 to 70 masses of a compound selected from the group consisting of compounds represented by (IIIc) or a compound selected from the group consisting of compounds represented by general formula (IVa), general formula (IVb) and general formula (IVc) The polymerizable compound-containing liquid crystal composition according to any one of claims 1, 2, 3, 4, 5 and 6. 3. The third component contains one or more compounds selected from the group consisting of compounds represented by general formula (IVa), general formula (IVb) and general formula (IVc). The polymerizable compound-containing liquid crystal composition according to any one of 2, 3, 4, 5, 6 or 7. A polymerizable compound-containing liquid crystal composition according to any one of claims 1, 2, 3, 4, 5, 6, 7, or 8 is used to polymerize a polymerizable compound in the polymerizable compound-containing liquid crystal composition. A liquid crystal display element characterized by imparting liquid crystal alignment ability. The liquid crystal display element according to claim 9, wherein the dielectric anisotropy of the polymerizable compound-containing liquid crystal composition is negative.