JPWO2017068875A1 - Liquid crystal composition and liquid crystal display element - Google Patents

Abstract

Provided are a liquid crystal composition capable of achieving vertical alignment of liquid crystal molecules by the action of a polar compound and a polymer, and a liquid crystal display device containing the composition.
Nematic having a negative dielectric anisotropy containing a specific liquid crystalline compound having a large negative dielectric anisotropy as the first component, a polar compound as the first additive, and a polymerizable compound as the second additive This liquid crystal composition contains a specific liquid crystal compound having a high maximum temperature or a small viscosity as a second component, and a specific liquid crystal compound having a large negative dielectric anisotropy as a third component. And a liquid crystal display device containing the composition.

Description

  The present invention relates to a liquid crystal composition, a liquid crystal display device containing the composition, and the like. In particular, a liquid crystal composition containing a polar compound and a polymerizable compound (or a polymer thereof), capable of achieving vertical alignment of liquid crystal molecules by the action of these compounds, and having a negative dielectric anisotropy, and a liquid crystal display It relates to an element.

  In the liquid crystal display element, the classification based on the operation mode of liquid crystal molecules is as follows: PC (phase change), TN (twisted nematic), STN (super twisted nematic), ECB (electrically controlled birefringence), OCB (optically compensated bend), IPS. Modes such as (in-plane switching), VA (vertical alignment), FFS (fringe field switching), and FPA (field-induced photo-reactive alignment). The classification based on the element driving method is PM (passive matrix) and AM (active matrix). PM is classified into static, multiplex, etc., and AM is classified into TFT (thin film transistor), MIM (metal insulator metal), and the like. TFTs are classified into amorphous silicon and polycrystalline silicon. The latter is classified into a high temperature type and a low temperature type according to the manufacturing process. The classification based on the light source includes a reflection type using natural light, a transmission type using backlight, and a semi-transmission type using both natural light and backlight.

  The liquid crystal display element contains a liquid crystal composition having a nematic phase. This composition has suitable properties. By improving the characteristics of the composition, an AM device having good characteristics can be obtained. The relationship between the two characteristics is summarized in Table 1 below. The characteristics of the composition will be further described based on a commercially available AM device. The temperature range of the nematic phase is related to the temperature range in which the device can be used. A preferred maximum temperature of the nematic phase is about 70 ° C. or more, and a preferred minimum temperature of the nematic phase is about −10 ° C. or less. The viscosity of the composition is related to the response time of the device. A short response time is preferred for displaying moving images on the device. A shorter response time is desirable even at 1 millisecond. Therefore, a small viscosity in the composition is preferred. A small viscosity at low temperatures is even more preferred.

  The optical anisotropy of the composition is related to the contrast ratio of the device. Depending on the mode of the device, a large optical anisotropy or a small optical anisotropy, ie an appropriate optical anisotropy is required. The product (Δn × d) of the optical anisotropy (Δn) of the composition and the cell gap (d) of the device is designed to maximize the contrast ratio. The appropriate value for the product depends on the type of operating mode. This value is in the range of about 0.30 μm to about 0.40 μm for the VA mode element and in the range of about 0.20 μm to about 0.30 μm for the IPS mode or FFS mode element. In these cases, a composition having a large optical anisotropy is preferable for a device having a small cell gap. A large dielectric anisotropy in the composition contributes to a low threshold voltage, a small power consumption and a large contrast ratio in the device. Therefore, a large dielectric anisotropy is preferable. A large specific resistance in the composition contributes to a large voltage holding ratio and a large contrast ratio in the device. Therefore, a composition having a large specific resistance not only at room temperature but also at a temperature close to the upper limit temperature of the nematic phase in the initial stage is preferable. A composition having a large specific resistance not only at room temperature but also at a temperature close to the upper limit temperature of the nematic phase after being used for a long time is preferable. The stability of the composition to ultraviolet light and heat is related to the lifetime of the device. When this stability is high, the lifetime of the device is long. Such characteristics are preferable for an AM device used in a liquid crystal projector, a liquid crystal television, and the like.

  In a polymer sustained alignment (PSA) type liquid crystal display element, a liquid crystal composition containing a polymer is used. First, a composition to which a small amount of a polymerizable compound is added is injected into the device. Next, the composition is irradiated with ultraviolet rays while applying a voltage between the substrates of the device. The polymerizable compound polymerizes to form a polymer network in the composition. In this composition, since the alignment of liquid crystal molecules can be controlled by the polymer, the response time of the device is shortened, and image burn-in is improved. Such an effect of the polymer can be expected for a device having modes such as TN, ECB, OCB, IPS, VA, FFS, and FPA.

  In a general-purpose liquid crystal display element, vertical alignment of liquid crystal molecules is achieved by a polyimide alignment film. On the other hand, in a liquid crystal display element having no alignment film, a liquid crystal composition containing a polymer and a polar compound is used. First, a composition to which a small amount of a polymerizable compound and a small amount of a polar compound are added is injected into the device. Here, polar compounds are adsorbed and arranged on the substrate surface. The liquid crystal molecules are aligned according to this arrangement. Next, the composition is irradiated with ultraviolet rays while applying a voltage between the substrates of the device. Here, the polymerizable compound is polymerized to stabilize the alignment of the liquid crystal molecules. In this composition, since the orientation of liquid crystal molecules can be controlled by the polymer and the polar compound, the response time of the device is shortened, and image burn-in is improved. Furthermore, in the element having no alignment film, the step of forming the alignment film is unnecessary. Since there is no alignment film, the electrical resistance of the device does not decrease due to the interaction between the alignment film and the composition. Such an effect by the combination of the polymer and the polar compound can be expected for a device having a mode such as TN, ECB, OCB, IPS, VA, FFS, and FPA.

  In an AM device having a TN mode, a composition having a positive dielectric anisotropy is used. A composition having a negative dielectric anisotropy is used in an AM device having a VA mode. In an AM device having an IPS mode or an FFS mode, a composition having a positive or negative dielectric anisotropy is used. In a polymer-supported orientation type AM device, a composition having positive or negative dielectric anisotropy is used. Examples of liquid crystal compositions having negative dielectric anisotropy are disclosed in the following Patent Documents 1 to 6. In the present invention, a polar compound and a polymerizable compound (or a polymer thereof) are combined with a liquid crystal compound, and this composition is used for a liquid crystal display element having no alignment film.

International Publication No. 2014/090362 Pamphlet International Publication No. 2014/094959 Pamphlet International Publication No. 2013/004372 Pamphlet International Publication No. 2012/104008 Pamphlet International Publication No. 2012/038026 Pamphlet JP 50-35076 A

  One object of the present invention is a liquid crystal composition containing a polar compound and a polymerizable compound (or a polymer thereof), wherein the polar compound has high compatibility with the liquid crystal compound. Another object is a liquid crystal composition capable of achieving vertical alignment of liquid crystal molecules by the action of the polymer. Other objectives are: high maximum temperature of nematic phase, low minimum temperature of nematic phase, small viscosity, appropriate optical anisotropy, negatively large dielectric anisotropy, large specific resistance, high stability against ultraviolet rays, high heat resistance It is a liquid crystal composition satisfying at least one characteristic in characteristics such as high stability. Another object is a liquid crystal composition having an appropriate balance between at least two properties. Another object is a liquid crystal display device containing such a composition. Another object is an AM device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime.

式（１）において、Ｒ^１は、炭素数２から１２のアルケニル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数２から１２のアルケニルであり；Ｒ^２は、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、炭素数２から１２のアルケニル、または炭素数２から１２のアルケニルオキシであり；環Ａおよび環Ｃは独立して、１，４−シクロヘキシレン、１，４−シクロヘキセニレン、テトラヒドロピラン−２，５−ジイル、１，４−フェニレン、少なくとも１つの水素がフッ素または塩素で置き換えられた１，４−フェニレン、ナフタレン−２，６−ジイル、少なくとも１つの水素がフッ素または塩素で置き換えられたナフタレン−２，６−ジイル、クロマン−２，６−ジイル、または少なくとも１つの水素がフッ素または塩素で置き換えられたクロマン−２，６−ジイルであり；環Ｂは、２，３−ジフルオロ−１，４−フェニレン、２−クロロ−３−フルオロ−１，４−フェニレン、２，３−ジフルオロ−５−メチル−１，４−フェニレン、３，４，５−トリフルオロナフタレン−２，６−ジイル、または７，８−ジフルオロクロマン−２，６−ジイルであり；Ｚ^１およびＺ^２は独立して、単結合、−ＣＨ_２ＣＨ_２−、−ＣＨ_２Ｏ−、−ＯＣＨ_２−、−ＣＯＯ−、または−ＯＣＯ−であり；ａは、１、２、または３であり、ｂは、０または１であり、そして、ａとｂとの和は３以下である。The present invention comprises a compound represented by the formula (1) as a first component, a polar compound as a first additive, and a polymerizable compound as a second additive, and having a negative dielectric anisotropy A composition and a liquid crystal display device containing the composition.

In formula (1), R ¹ is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; R ² is having 1 to 12 carbons Or an alkyl having 1 to 12 carbons, an alkenyl having 2 to 12 carbons, or an alkenyloxy having 2 to 12 carbons; ring A and ring C are independently 1,4-cyclohexylene, 1, 4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, at least one Naphthalene-2,6-diyl, chroman-2,6-diyl, in which hydrogen is replaced by fluorine or chlorine, or at least one Chroman-2,6-diyl substituted with fluorine or chlorine; ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2 , 3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl, or 7,8-difluorochroman-2,6-diyl; Z ¹ and Z ² is independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—; a is 1, 2, or 3 , B is 0 or 1, and the sum of a and b is 3 or less.

  One advantage of the present invention is a liquid crystal composition containing a polar compound and a polymerizable compound (or a polymer thereof), wherein the polar compound has high compatibility with the liquid crystal compound. Another advantage is a liquid crystal composition capable of achieving vertical alignment of liquid crystal molecules by the action of the polymer. Another advantage is the high maximum temperature of the nematic phase, the low minimum temperature of the nematic phase, small viscosity, suitable optical anisotropy, negative large dielectric anisotropy, large specific resistance, high stability against ultraviolet light, high heat resistance It is a liquid crystal composition satisfying at least one characteristic in characteristics such as high stability. Another advantage is a liquid crystal composition having an appropriate balance between at least two properties. Another advantage is a liquid crystal display device containing such a composition. Another advantage is an AM device having characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime.

  Terms used in this specification are as follows. The terms “liquid crystal composition” and “liquid crystal display element” may be abbreviated as “composition” and “element”, respectively. “Liquid crystal display element” is a general term for liquid crystal display panels and liquid crystal display modules. “Liquid crystal compound” is a compound having a liquid crystal phase such as a nematic phase and a smectic phase, and a liquid crystal phase, but has a composition for the purpose of adjusting characteristics such as temperature range, viscosity, and dielectric anisotropy of the nematic phase. It is a general term for compounds mixed with products. This compound has a six-membered ring such as 1,4-cyclohexylene and 1,4-phenylene, and its molecular structure is rod-like. The “polymerizable compound” is a compound added for the purpose of forming a polymer in the composition.

  The liquid crystal composition is prepared by mixing a plurality of liquid crystal compounds. Additives such as optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, and polar compounds are added to this liquid crystal composition as necessary. The Liquid crystal compounds and additives are mixed in such a procedure. The ratio (content) of the liquid crystal compound is expressed as a weight percentage (% by weight) based on the weight of the liquid crystal composition not containing the additive even when the additive is added. The ratio (addition amount) of the additive is expressed as a percentage by weight (% by weight) based on the weight of the liquid crystal composition not containing the additive. Weight parts per million (ppm) may be used. The ratio of the polymerization initiator and the polymerization inhibitor is exceptionally expressed based on the weight of the polymerizable compound.

  “Maximum temperature of nematic phase” may be abbreviated as “maximum temperature”. “Lower limit temperature of nematic phase” may be abbreviated as “lower limit temperature”. "High specific resistance" means that the composition has a large specific resistance not only at room temperature but also at a temperature close to the upper limit temperature in the initial stage, and a large specific resistance not only at room temperature but also at a temperature close to the upper limit temperature after long-term use. It means having. "High voltage holding ratio" means that the device has a large voltage holding ratio not only at room temperature but also at a temperature close to the upper limit temperature in the initial stage, and a large voltage not only at room temperature but also at a temperature close to the upper limit temperature after long-term use. It means having a retention rate. In a composition or device, characteristics may be examined before and after a aging test (including an accelerated deterioration test). The expression “increasing dielectric anisotropy” means that when the composition has a positive dielectric anisotropy, the value increases positively, and the composition having a negative dielectric anisotropy When it is a thing, it means that the value increases negatively.

  The compound represented by the formula (1) may be abbreviated as “compound (1)”. At least one compound selected from the group of compounds represented by formula (1) may be abbreviated as “compound (1)”. “Compound (1)” means one compound represented by formula (1), a mixture of two compounds, or a mixture of three or more compounds. The same applies to compounds represented by other formulas. The expression “at least one‘ A ’” means that the number of ‘A’ is arbitrary. The expression “at least one 'A' may be replaced by 'B'” means that when the number of 'A' is one, the position of 'A' is arbitrary and the number of 'A' is 2 Even when there are more than two, their positions can be selected without restriction. This rule also applies to the expression “at least one 'A' is replaced by 'B'".

Expressions such as “at least one —CH ₂ — may be replaced by —O—” are used herein. In this case, —CH ₂ —CH ₂ —CH ₂ — may be converted to —O—CH ₂ —O— by replacing non-adjacent —CH ₂ — with —O—. However, adjacent —CH ₂ — is not replaced by —O—. This replacement is -O-O-CH ₂ - is because (peroxide) is produced. That is, the expression includes both “one —CH ₂ — may be replaced with —O—” and “at least two non-adjacent —CH ₂ — may be replaced with —O—”. means. This rule applies not only to replacement with —O— but also to replacement with a divalent group such as —CH═CH— or —COO—. In alkyl, at least one —CH ₂ — may be replaced by a cycloalkylene having 3 to 8 carbon atoms. The carbon number of such alkyl increases with this type of replacement. In such a case, the maximum carbon number is 30. This rule applies not only to monovalent groups such as alkyl, but also to divalent groups such as alkylene.

In the chemical formulas of the component compounds, the symbol of the terminal group R ² is used for a plurality of compounds. In these compounds, two groups represented by any two R ² may be the same or different. For example, there is a case where R ^{2 of} the compound (1-1) is ethyl and R ² of the compound (1-2) is ethyl. In some cases, R ^{2 of} compound (1-1) is ethyl and R ² of compound (1-2) is propyl. This rule also applies to symbols such as other end groups. In Formula (1), when a is 2, two rings A exist. In this compound, the two rings represented by the two rings A may be the same or different. This rule also applies to any two rings A when a is greater than 2. This rule also applies to other symbols. This rule also applies to the case of two -Sp ¹⁰ -P ⁵ in the compound (6-27).

Symbols such as A, B, C, and D surrounded by hexagons correspond to rings such as ring A, ring B, ring C, and ring D, respectively, and represent rings such as six-membered rings and condensed rings. In the formula (6), oblique lines crossing the hexagon represents that any hydrogen on the ring may be substituted with groups such as -Sp ¹⁰ -P ^5. A subscript such as “v” indicates the number of replaced groups. When the subscript 'v' is 0, there is no such replacement. When the subscript 'v' is 2 or more, a plurality of -Sp ¹⁰ -P ⁵ exists on the ring U. The plurality of groups represented by -Sp ¹⁰ -P ⁵ may be the same or different. In the expression “ring A and ring C are independently X, Y, or Z”, “independently” is used because there are plural subjects. When the subject is “ring A is”, “independently” is not used because the subject is singular. When “Ring A” is used in a plurality of formulas, the rule “may be the same or different” applies to “Ring A”. The same applies to other groups.

2-Fluoro-1,4-phenylene means the following two divalent groups. In the chemical formula, fluorine may be leftward (L) or rightward (R). This rule also applies to asymmetric divalent groups generated by removing two hydrogens from the ring, such as tetrahydropyran-2,5-diyl. This rule also applies to divalent linking groups such as carbonyloxy (—COO— or —OCO—).

  The alkyl of the liquid crystal compound is linear or branched and does not include cyclic alkyl. Linear alkyl is preferred over branched alkyl. The same applies to terminal groups such as alkoxy and alkenyl. In general, trans is preferable to cis for the configuration of 1,4-cyclohexylene.

  The present invention includes the following items.

式（１）において、Ｒ^１は、炭素数２から１２のアルケニル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数２から１２のアルケニルであり；Ｒ^２は、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、炭素数２から１２のアルケニル、または炭素数２から１２のアルケニルオキシであり；環Ａおよび環Ｃは独立して、１，４−シクロヘキシレン、１，４−シクロヘキセニレン、テトラヒドロピラン−２，５−ジイル、１，４−フェニレン、少なくとも１つの水素がフッ素または塩素で置き換えられた１，４−フェニレン、ナフタレン−２，６−ジイル、少なくとも１つの水素がフッ素または塩素で置き換えられたナフタレン−２，６−ジイル、クロマン−２，６−ジイル、または少なくとも１つの水素がフッ素または塩素で置き換えられたクロマン−２，６−ジイルであり；環Ｂは、２，３−ジフルオロ−１，４−フェニレン、２−クロロ−３−フルオロ−１，４−フェニレン、２，３−ジフルオロ−５−メチル−１，４−フェニレン、３，４，５−トリフルオロナフタレン−２，６−ジイル、または７，８−ジフルオロクロマン−２，６−ジイルであり；Ｚ^１およびＺ^２は独立して、単結合、−ＣＨ_２ＣＨ_２−、−ＣＨ_２Ｏ−、−ＯＣＨ_２−、−ＣＯＯ−、または−ＯＣＯ−であり；ａは、１、２、または３であり、ｂは、０または１であり、そして、ａとｂとの和は３以下である。Item 1. A liquid crystal composition comprising a compound represented by formula (1) as a first component, a polar compound as a first additive, and a polymerizable compound as a second additive, and having negative dielectric anisotropy.

In formula (1), R ¹ is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; R ² is having 1 to 12 carbons Or an alkyl having 1 to 12 carbons, an alkenyl having 2 to 12 carbons, or an alkenyloxy having 2 to 12 carbons; ring A and ring C are independently 1,4-cyclohexylene, 1, 4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, at least one Naphthalene-2,6-diyl, chroman-2,6-diyl, in which hydrogen is replaced by fluorine or chlorine, or at least one Chroman-2,6-diyl substituted with fluorine or chlorine; ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2 , 3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl, or 7,8-difluorochroman-2,6-diyl; Z ¹ and Z ² is independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—; a is 1, 2, or 3 , B is 0 or 1, and the sum of a and b is 3 or less.

式（１−１）から式（１−２１）において、Ｒ^１は、炭素数２から１２のアルケニル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数２から１２のアルケニルであり；Ｒ^２は、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、炭素数２から１２のアルケニル、または炭素数２から１２のアルケニルオキシである。Item 2. Item 2. The liquid crystal composition according to item 1, comprising a compound selected from the group of compounds represented by formula (1-1) to formula (1-21) as a first component.

In Formula (1-1) to Formula (1-21), R ¹ is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; R ² is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyloxy having 2 to 12 carbons.

Item 3. Item 3. The liquid crystal composition according to item 1 or 2, wherein the proportion of the first component is in the range of 5% by weight to 85% by weight based on the weight of the liquid crystal composition.

式（２）において、Ｒ^３およびＲ^４は独立して、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、炭素数２から１２のアルケニル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数２から１２のアルケニルであり；環Ｄおよび環Ｅは独立して、１，４−シクロヘキシレン、１，４−フェニレン、２−フルオロ−１，４−フェニレン、または２，５−ジフルオロ−１，４−フェニレンであり；Ｚ^３は、単結合、−ＣＨ_２ＣＨ_２−、−ＣＨ_２Ｏ−、−ＯＣＨ_２−、−ＣＯＯ−、または−ＯＣＯ−であり；ｃは、１、２、または３である。Item 4. Item 4. The liquid crystal composition according to any one of items 1 to 3, comprising a compound represented by formula (2) as a second component.

In Formula (2), R ³ and R ⁴ are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or at least one hydrogen is fluorine or chlorine. Substituted alkenyl having 2 to 12 carbons; ring D and ring E are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5 - be-difluoro-1,4-phenylene; ^{Z 3} is a single _{bond, -CH 2 CH 2 -, -} CH 2 O -, - OCH 2 -, - COO-, or a -OCO-; c is 1, 2, or 3.

式（２−１）から式（２−１３）において、Ｒ^３およびＲ^４は独立して、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、炭素数２から１２のアルケニル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数２から１２のアルケニルである。Item 5. Item 5. The liquid crystal composition according to any one of items 1 to 4, comprising a compound selected from the group of compounds represented by formulas (2-1) to (2-13) as a second component.

In formulas (2-1) to (2-13), R ³ and R ⁴ are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or C2-C12 alkenyl in which at least one hydrogen is replaced by fluorine or chlorine.

Item 6. Item 6. The liquid crystal composition according to item 4 or 5, wherein the ratio of the second component is in the range of 5% by weight to 65% by weight based on the weight of the liquid crystal composition.

式（３）において、Ｒ^５およびＲ^６は独立して、炭素数１から１２のアルキルまたは炭素数１から１２のアルコキシであり；環Ｆおよび環Ｉは独立して、１，４−シクロヘキシレン、１，４−シクロヘキセニレン、テトラヒドロピラン−２，５−ジイル、１，４−フェニレン、少なくとも１つの水素がフッ素または塩素で置き換えられた１，４−フェニレン、ナフタレン−２，６−ジイル、少なくとも１つの水素がフッ素または塩素で置き換えられたナフタレン−２，６−ジイル、クロマン−２，６−ジイル、または少なくとも１つの水素がフッ素または塩素で置き換えられたクロマン−２，６−ジイルであり；環Ｇは、２，３−ジフルオロ−１，４−フェニレン、２−クロロ−３−フルオロ−１，４−フェニレン、２，３−ジフルオロ−５−メチル−１，４−フェニレン、３，４，５−トリフルオロナフタレン−２，６−ジイル、または７，８−ジフルオロクロマン−２，６−ジイルであり；Ｚ^４およびＺ^５は独立して、単結合、−ＣＨ_２ＣＨ_２−、−ＣＨ_２Ｏ−、−ＯＣＨ_２−、−ＣＯＯ−、または−ＯＣＯ−であり；ｄは、１、２、または３であり；ｅは、０または１であり；ｄとｅとの和は３以下である。Item 7. Item 7. The liquid crystal composition according to any one of items 1 to 6, comprising a compound represented by formula (3) as a third component.

In formula (3), R ⁵ and R ⁶ are independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons; ring F and ring I are independently 1,4-cyclohexylene 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, Naphthalene-2,6-diyl, chroman-2,6-diyl, in which at least one hydrogen is replaced by fluorine or chlorine, or chroman-2,6-diyl, in which at least one hydrogen is replaced by fluorine or chlorine Ring G is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-; - methyl-1,4-phenylene, 3,4,5-trifluoro-2,6-diyl or 7,8-be difluorochroman-2,6-diyl; ^{Z 4} and ^{Z 5} are independently , Single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—; d is 1, 2, or 3; e is 0 or 1; the sum of d and e is 3 or less.

式（３−１）から式（３−２１）において、Ｒ^５およびＲ^６は独立して、炭素数１から１２のアルキルまたは炭素数１から１２のアルコキシである。Item 8. Item 8. The liquid crystal composition according to any one of items 1 to 7, comprising a compound selected from the group of compounds represented by formulas (3-1) to (3-21) as a third component.

In formula (3-1) to formula (3-21), R ⁵ and R ⁶ are each independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons.

Item 9. Item 9. The liquid crystal composition according to item 7 or 8, wherein the ratio of the third component is in the range of 5% by weight to 60% by weight based on the weight of the liquid crystal composition.

Item 10. Item 10. The liquid crystal composition according to any one of items 1 to 9, containing a polar compound having a polar group containing a hetero atom selected from nitrogen, oxygen, sulfur, and phosphorus as the first additive.

式（４）において、ＭＥＳは、少なくとも１つの環を有するメソゲン基であり；式（５）において、Ｒ^７は炭素数４から２０のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−ＣＨ＝ＣＨ−、−ＣＦ＝ＣＨ−、−ＣＨ＝ＣＦ−、−Ｃ≡Ｃ−、または炭素数３から８のシクロアルキレンで置き換えられてもよく、これらの基において、少なくとも１つの水素はフッ素または塩素で置き換えられてもよく；式（４）および式（５）において、Ｒ^８は、ＯＨ構造の酸素原子、ＳＨ構造の硫黄原子、および第一級、第二級、または第三級のアミン構造の窒素原子の少なくとも１つを有する極性基であり；ｘは、１または２である。Item 11. Item 11. The liquid crystal composition according to any one of items 1 to 10, comprising a polar compound selected from the group of compounds represented by formula (4) and formula (5) as a first additive.

In Formula (4), MES is a mesogenic group having at least one ring; in Formula (5), R ⁷ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — May be replaced by —CH═CH—, —CF═CH—, —CH═CF—, —C≡C—, or cycloalkylene having 3 to 8 carbon atoms, and in these groups, at least one of Hydrogen may be replaced by fluorine or chlorine; in Formula (4) and Formula (5), R ⁸ is an oxygen atom of OH structure, a sulfur atom of SH structure, and primary, secondary, or primary A polar group having at least one nitrogen atom of a tertiary amine structure; x is 1 or 2.

式（４−１）において、Ｒ^９は、水素、フッ素、塩素、または炭素数１から２５のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−ＮＲ^０−、−Ｏ−、−Ｓ−、−ＣＯ−、−ＣＯ−Ｏ−、−Ｏ−ＣＯ−、−Ｏ−ＣＯ−Ｏ−、または炭素数３から８のシクロアルキレンで置き換えられてもよく、そして少なくとも１つの第三級炭素（＞ＣＨ−）は、窒素（＞Ｎ−）で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく、ここでＲ^０は、水素または炭素数１から１２のアルキルであり；Ｒ^１０は、炭素数１から２５のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−ＮＲ^０−、−Ｏ−、−Ｓ−、−ＣＯ−、−ＣＯＯ−、−ＯＣＯ−、−ＯＣＯＯ−、または炭素数３から８のシクロアルキレンで置き換えられてもよく、少なくとも１つの第三級炭素（＞ＣＨ−）は、窒素（＞Ｎ−）で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく、ここでＲ^０は、水素または炭素数１から１２のアルキルであり、ただしＲ^１０は、ＯＨ構造の酸素原子、ＳＨ構造の硫黄原子、または第一級、第二級、または第三級のアミン構造の窒素原子の少なくとも１つを有し；環Ｊおよび環Ｋは独立して、炭素数６から２５の芳香族基、炭素数５から２５の複素芳香族基、炭素数３から２５の脂環式基、または炭素数４から２５の複素脂環式基であり、これらの基は縮合環であってもよく、これらの基において、少なくとも１つの水素は基Ｔで置き換えられてもよく、ここで基Ｔは、−ＯＨ、−（ＣＨ_２）_ｉ−ＯＨ、フッ素、塩素、−ＣＮ、−ＮＯ_２、−ＮＣＯ、−ＮＣＳ、−ＯＣＮ、−ＳＣＮ、−Ｃ（＝Ｏ）Ｎ（Ｒ^０）_２、−Ｃ（＝Ｏ）Ｒ^０、−Ｎ（Ｒ^０）_２、−（ＣＨ_２）_ｉ−Ｎ（Ｒ^０）_２、炭素数６から２０のアリール、炭素数６から２０のヘテロアリール、炭素数１から２５のアルキル、炭素数１から２５のアルコキシ、炭素数２から２５のアルキルカルボニル、炭素数２から２５のアルコキシカルボニル、炭素数２から２５のアルキルカルボニルオキシ、または炭素数２から２５のアルコキシカルボニルオキシであり、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく、ここでＲ^０は、水素または炭素数１から１２のアルキルであり、そしてｉは、１、２、３、または４であり；Ｚ^６は、−Ｏ−、−Ｓ−、−ＣＯ−、−ＣＯ−Ｏ−、−ＯＣＯ−、−Ｏ−ＣＯ−Ｏ−、−ＯＣＨ_２−、−ＣＨ_２Ｏ−、−ＳＣＨ_２−、−ＣＨ_２Ｓ−、−ＣＦ_２Ｏ−、−ＯＣＦ_２−、−ＣＦ_２Ｓ−、−ＳＣＦ_２−、−（ＣＨ_２）_ｉ−、−ＣＦ_２ＣＨ_２−、−ＣＨ_２ＣＦ_２−、−（ＣＦ_２）_ｉ−、−ＣＨ＝ＣＨ−、−ＣＦ＝ＣＦ−、−Ｃ≡Ｃ−、−ＣＨ＝ＣＨ−ＣＯＯ−、−ＯＣＯ−ＣＨ＝ＣＨ−、−Ｃ（Ｒ^０）_２−、または単結合であり、ここでＲ^０は、水素または炭素数１から１２のアルキルであり、そしてｉは、１、２、３、または４であり；ｆは、０、１、２、３、４、または５である。Item 12. Item 12. The liquid crystal composition according to any one of items 1 to 11, comprising a polar compound represented by formula (4-1) as a first additive.

In Formula (4-1), R ⁹ is hydrogen, fluorine, chlorine, or alkyl having 1 to 25 carbons, and in this alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—. , -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, or cycloalkylene having 3 to 8 carbon atoms, and at least one first The tertiary carbon (> CH—) may be replaced with nitrogen (> N—), in which at least one hydrogen may be replaced with fluorine or chlorine, where R ⁰ is Hydrogen or alkyl having 1 to 12 carbons; R ¹⁰ is alkyl having 1 to 25 carbons, in which at least one —CH ₂ — is —NR ⁰ —, —O—, —S; -, -CO-, -COO , -OCO-, -OCOO-, or cycloalkylene having 3 to 8 carbon atoms, and at least one tertiary carbon (> CH-) may be replaced by nitrogen (> N-) In these groups, at least one hydrogen may be replaced by fluorine or chlorine, where R ⁰ is hydrogen or alkyl having 1 to 12 carbons, provided that R ¹⁰ is an oxygen of OH structure Having at least one atom, a sulfur atom of an SH structure, or a nitrogen atom of a primary, secondary, or tertiary amine structure; ring J and ring K are independently 6 to 25 carbon atoms An aromatic group having 5 to 25 carbon atoms, an alicyclic group having 3 to 25 carbon atoms, or a heteroalicyclic group having 4 to 25 carbon atoms, and these groups are condensed rings. In these groups, Both may be one hydrogen replaced with a group T, wherein the group T _{is, -OH, - (CH 2)} i -OH, fluorine, _{chlorine, -CN, -NO 2, -NCO,} -NCS, - _{^{OCN, -SCN, -C (= O}} ) N (R 0) 2, -C (= O) R 0, -N (R 0) 2, - (CH 2) i -N (R 0) 2, carbon Aryl having 6 to 20 carbon atoms, heteroaryl having 6 to 20 carbon atoms, alkyl having 1 to 25 carbon atoms, alkoxy having 1 to 25 carbon atoms, alkylcarbonyl having 2 to 25 carbon atoms, alkoxycarbonyl having 2 to 25 carbon atoms, an alkoxycarbonyloxy alkylcarbonyloxy or 2 to 25 carbon atoms, from 25 to 2 carbon atoms, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is Alkyl elementary or having 1 to 12 carbon atoms, and i is an 1, 2, 3 or ^{4,; Z} 6 is, -O -, - S -, - CO -, - CO-O -, - _{OCO -, - OCO-O -} , - OCH 2 -, - CH 2 O -, - SCH 2 -, - CH 2 S -, - CF 2 O -, - OCF 2 -, - CF 2 S-, _{-SCF 2 -, - (CH 2} ) i -, - CF 2 CH 2 -, - CH 2 CF 2 -, - (CF 2) i -, - CH = CH -, - CF = CF -, - C≡ C—, —CH═CH—COO—, —OCO—CH═CH—, —C (R ⁰ ) ₂ —, or a single bond, wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbons. And i is 1, 2, 3, or 4; f is 0, 1, 2, 3, 4, or 5.

式（５−１）において、Ｒ^１３は、炭素数４から２０のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−ＣＨ＝ＣＨ−、−ＣＦ＝ＣＨ−、−ＣＨ＝ＣＦ−、−Ｃ≡Ｃ−、または炭素数３から８のシクロアルキレンで置き換えられてもよく、これらの基において、少なくとも１つの水素はフッ素または塩素で置き換えられてもよく；Ｒ^１４は、炭素数１から２５のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−ＮＲ^０−、−Ｏ−、−Ｓ−、−ＣＯ−、−ＣＯＯ−、−ＯＣＯ−、−ＯＣＯＯ−、または炭素数３から８のシクロアルキレンで置き換えられてもよく、少なくとも１つの第三級炭素（＞ＣＨ−）は、窒素（＞Ｎ−）で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく、ここでＲ^０は、水素または炭素数１から１２のアルキルであり、ただしＲ^１４は、ＯＨ構造の酸素原子、ＳＨ構造の硫黄原子、および第一級、第二級、または第三級のアミン構造の窒素原子の少なくとも１つを有する。Item 13. Item 13. The liquid crystal composition according to any one of items 1 to 12, comprising a polar compound represented by formula (5-1) as the first additive.

In Formula (5-1), R ¹³ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — is —CH═CH—, —CF═CH—, —CH═. CF—, —C≡C—, or cycloalkylene having 3 to 8 carbon atoms may be substituted, and in these groups, at least one hydrogen may be replaced with fluorine or chlorine; R ¹⁴ is carbon In the alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—, —S—, —CO—, —COO—, —OCO—, —OCOO—. Or at least one tertiary carbon (> CH-) may be replaced with nitrogen (> N-), and in these groups, Least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbon atoms, provided that R ¹⁴ is an oxygen atom of the OH structure, the sulfur atom of the SH structure And at least one nitrogen atom of a primary, secondary, or tertiary amine structure.

式（Ａ１）から式（Ａ４）において、Ｓｐ^４、Ｓｐ^６、およびＳｐ^７は独立して、単結合または基（−Ｓｐ’’−Ｘ’’−）であり、ここで、Ｓｐ’’は、炭素数１から２０のアルキレンであり、このアルキレンにおいて少なくとも１つの−ＣＨ_２−は、−Ｏ−、−Ｓ−、−ＮＨ−、−Ｎ（Ｒ^０）−、−ＣＯ−、−ＣＯ−Ｏ−、−Ｏ−ＣＯ、−Ｏ−ＣＯ−Ｏ−、−Ｓ−ＣＯ−、−ＣＯ−Ｓ−、−Ｎ（Ｒ^０）−ＣＯ−Ｏ−、−Ｏ−ＣＯ−Ｎ（Ｒ^０）−、−Ｎ（Ｒ^０）−ＣＯ−Ｎ（Ｒ^０）−、−ＣＨ＝ＣＨ−、または−Ｃ≡Ｃ−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素、塩素、または−ＣＮで置き換えられてもよく、そしてＸ’’は、−Ｏ−、−Ｓ−、−ＣＯ−、−ＣＯ−Ｏ−、−Ｏ−ＣＯ−、−Ｏ−ＣＯ−Ｏ−、−ＣＯ−Ｎ（Ｒ^０）−、−Ｎ（Ｒ^０）−ＣＯ−、−Ｎ（Ｒ^０）−ＣＯ−Ｎ（Ｒ^０）−、−ＯＣＨ_２−、−ＣＨ_２Ｏ−、−ＳＣＨ_２−、−ＣＨ_２Ｓ−、−ＣＦ_２Ｏ−、−ＯＣＦ_２−、−ＣＦ_２Ｓ−、−ＳＣＦ_２−、−ＣＦ_２ＣＨ_２−、−ＣＨ_２ＣＦ_２−、−ＣＦ_２ＣＦ_２−、−ＣＨ＝Ｎ−、−Ｎ＝ＣＨ−、−Ｎ＝Ｎ−、−ＣＨ＝ＣＲ^０−、−ＣＹ^２＝ＣＹ^３−、−Ｃ≡Ｃ−、−ＣＨ＝ＣＨ−ＣＯ−Ｏ−、−Ｏ−ＣＯ−ＣＨ＝ＣＨ−、または単結合であり、ここでＲ^０は、水素または炭素数１から１２のアルキルであり、そしてＹ^２およびＹ^３は独立して、水素、フッ素、塩素、または−ＣＮであり；Ｓｐ^５は、＞ＣＨ−、＞ＣＲ^ａ１−、＞Ｎ−、または＞Ｃ＜であり；Ｘ^１は、−ＯＨ、−ＯＲ^ａ１、−ＣＯＯＨ、−ＮＨ_２、−ＮＨＲ^ａ１、−Ｎ（Ｒ^ａ１）_２、−ＳＨ、−ＳＲ^ａ１、

であり、ここでＲ^０は、水素または炭素数１から１２のアルキルであり；Ｘ^２は、−Ｏ−、−ＣＯ−、−ＮＨ−、−ＮＲ^ａ１−、−Ｓ−、または単結合であり；Ｚ^９は、炭素数１から１５のアルキレン、炭素数５または６の脂環式基、またはこれらの組み合わせであり、これらの基において、少なくとも１つの水素は、−ＯＨ、−ＯＲ^ａ１、−ＣＯＯＨ、−ＮＨ_２、−ＮＨＲ^ａ１、−Ｎ（Ｒ^ａ１）_２、フッ素、または塩素で置き換えられてもよく；ここで、Ｒ^ａ１は、炭素数１から１５のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−Ｃ≡Ｃ−、−ＣＨ＝ＣＨ−、−ＣＯＯ−、−ＯＣＯ−、−ＣＯ−、または−Ｏ−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく；環Ｐは、炭素数６から２５の芳香族基または炭素数３から２５の脂環式基であり、これらの基は縮合環であってもよく、これらの基において、１つから３つの水素はＲ^Ｌで置き換えられてもよく、ここでＲ^Ｌは、−ＯＨ、−（ＣＨ_２）_ｒ−ＯＨ、フッ素、塩素、−ＣＮ、−ＮＯ_２、−ＮＣＯ、−ＮＣＳ、−ＯＣＮ、−ＳＣＮ、−Ｃ（＝Ｏ）Ｎ（Ｒ^０）_２、−Ｃ（＝Ｏ）Ｒ^０、−Ｎ（Ｒ^０）_２、−（ＣＨ_２）_ｒ−Ｎ（Ｒ^０）_２、−ＳＨ、−ＳＲ^０、炭素数６から２０のアリール、炭素数６から２０のヘテロアリール、炭素数１から２５のアルキル、炭素数１から２５のアルコキシ、炭素数２から２５のアルキルカルボニル、炭素数２から２５のアルコキシカルボニル、炭素数２から２５のアルキルカルボニルオキシ、または炭素数２から２５のアルコキシカルボニルオキシであり、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく、ここでＲ^０は、水素または炭素数１から１２のアルキルであり、そしてｒは、１、２、３、または４であり；ｐは、０、１、２、または３であり；ｑは、２、３、４、または５である。Item 14. Item 12. The formula (4) and the formula (5) according to item 11, wherein R ⁸ is a monovalent group selected from the group of groups represented by formula (A1) to formula (A4). Liquid crystal composition.

In formula (A1) to formula (A4), Sp ⁴ , Sp ⁶ , and Sp ⁷ are each independently a single bond or a group (—Sp ″ —X ″ —), where Sp ″ is , Alkylene having 1 to 20 carbon atoms, in which at least one —CH ₂ — is —O—, —S—, —NH—, —N (R ⁰ ) —, —CO—, —CO—. O-, -O-CO, -O-CO-O-, -S-CO-, -CO-S-, -N ( ^R0 ) -CO-O-, -O-CO-N ( ^R0 ). -, -N ( ^R0 ) -CO-N ( ^R0 )-, -CH = CH-, or -C≡C-, in which at least one hydrogen is fluorine, May be replaced by chlorine, or —CN, and X ″ represents —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—C. O—O—, —CO—N (R ⁰ ) —, —N (R ⁰ ) —CO—, —N (R ⁰ ) —CO—N (R ⁰ ) —, —OCH ₂ —, —CH ₂ O _{-, - SCH 2 -, -} CH 2 S -, - CF 2 O -, - OCF 2 -, - CF 2 S -, - SCF 2 -, - CF 2 CH 2 -, - CH 2 CF 2 -, - CF ₂ CF ₂ —, —CH═N—, —N═CH—, —N═N—, —CH═CR ⁰ —, —CY ² = CY ³ —, —C≡C—, —CH═CH— CO—O—, —O—CO—CH═CH—, or a single bond, where R ⁰ is hydrogen or alkyl of 1 to 12 carbons, and Y ² and Y ³ are independently hydrogen, fluorine, chlorine or be -CN,; Sp ^{5 is,> CH -,> CR a1} -,> N-, or> is C ^{<; X} 1 is, -OH, -OR ^{a _{, -COOH, -NH 2, -NHR a1}} , -N (R a1) 2, -SH, -SR a1,

Wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbons; X ² is —O—, —CO—, ^—NH— , —NR ^a1 —, —S—, or a single bond Yes; Z ⁹ is an alkylene having 1 to 15 carbons, an alicyclic group having 5 or 6 carbons, or a combination thereof, in which at least one hydrogen is —OH, —OR ^a1 , —COOH, —NH ₂ , —NHR ^a1 , —N (R ^a1 ) ₂ , fluorine, or chlorine may be substituted; where R ^a1 is alkyl having 1 to 15 carbons, , At least one —CH ₂ — may be replaced by —C≡C—, —CH═CH—, —COO—, —OCO—, —CO—, or —O—, At least one hydrogen is fluorine Or may be replaced by chlorine; ring P is an aromatic group having 6 to 25 carbon atoms or an alicyclic group having 3 to 25 carbon atoms, and these groups may be condensed rings, in the group, the three hydrogen from one may be replaced by ^{R L,} where ^R L _{is, -OH, - (CH 2)} r -OH, fluorine, chlorine, -CN, _-NO 2, - NCO, —NCS, —OCN, —SCN, —C (═O) N (R ⁰ ) ₂ , —C (═O) R ⁰ , —N (R ⁰ ) ₂ , — (CH ₂ ) _r —N ( R ⁰ ) ₂ , —SH, —SR ⁰ , aryl having 6 to 20 carbon atoms, heteroaryl having 6 to 20 carbon atoms, alkyl having 1 to 25 carbon atoms, alkoxy having 1 to 25 carbon atoms, and 2 to 25 carbon atoms Alkylcarbonyl, alkoxycarbonyl having 2 to 25 carbon atoms, carbon number 2 to 25 An alkoxycarbonyloxy alkylcarbonyloxy or C 2 to 25, in these groups, at least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is hydrogen or C 1 -C 12 is alkyl, and r is 1, 2, 3, or 4; p is 0, 1, 2, or 3; q is 2, 3, 4, or 5.

式（４−１−１）から式（４−１−４）において、Ｒ^１５は、炭素数１から８のアルキルまたはフッ素であり；環Ｑおよび環Ｒは独立して、１，４−シクロヘキシレン、１，４−フェニレン、２−フルオロ−１，４−フェニレン、２−フルオロ−１，３−フェニレン、２−エチル−１，４−フェニレン、２，６−ジエチル−１，４−フェニレン、２−トリフルオロメチル−１，４−フェニレン、２，３−ジフルオロ−１，４−フェニレン、２，５−ジフルオロ−１，４−フェニレン、２，６−ジフルオロ−１，４−フェニレン、または２，３，５，６−テトラフルオロ−１，４−フェニレンであり；環Ｓは、シクロヘキシルまたはフェニルであり；Ｚ^１０は、単結合、−ＣＨ_２ＣＨ_２−、−ＣＯＯ−、または−ＯＣＯ−であり；Ｚ^１１は、単結合、炭素数１から１５のアルキレン、炭素数５または６の脂環式基、またはこれらの組み合わせであり、これらの基において、少なくとも１つの水素は、−ＯＨ、−ＯＲ^ａ１、−ＣＯＯＨ、−ＮＨ_２、−ＮＨＲ^ａ１、−Ｎ（Ｒ^ａ１）_２、フッ素、または塩素で置き換えられてもよく、ここでＲ^ａ１は、炭素数１から１５のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−Ｃ≡Ｃ−、−ＣＨ＝ＣＨ−、−ＣＯＯ−、−ＯＣＯ−、−ＣＯ−、または−Ｏ−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく；Ｓｐ^４は、単結合、−ＣＨ_２ＣＨ_２−、−ＣＨ_２ＣＨ_２ＣＨ_２−、−ＣＨ_２Ｏ−、または−ＯＣＨ_２−であり；Ｓｐ^７は、単結合、または炭素数１から５のアルキレンであり、このアルキレンにおいて−ＣＨ_２−は−Ｏ−または−ＮＨ−で置き換えられてもよく；ｓは、０、１、２、３、４、または５であり；Ｘ^３は−ＯＨ、−ＣＯＯＨ、−ＳＨ、−ＯＣＨ_３、または−ＮＨ_２であり；Ｘ^４は単結合または−Ｏ−である。Item 15. Item 13. The liquid crystal composition according to item 11 or 12, wherein the first additive is a compound selected from the group of compounds represented by formula (4-1-1) to formula (4-1-4).

In the formula (4-1-1) to the formula (4-1-4), R ¹⁵ is alkyl having 1 to 8 carbons or fluorine; and the ring Q and the ring R are independently 1,4-cyclohexyl. Silene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2-fluoro-1,3-phenylene, 2-ethyl-1,4-phenylene, 2,6-diethyl-1,4-phenylene, 2-trifluoromethyl-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, or 2 , 3,5,6-tetrafluoro-1,4-phenylene; ring S is cyclohexyl or phenyl; Z ¹⁰ is a single bond, —CH ₂ CH ₂ —, —COO—, or —OCO—. Z ¹¹ is A single bond, an alkylene having 1 to 15 carbon atoms, an alicyclic group having 5 or 6 carbon atoms, or a combination thereof, in which at least one hydrogen is —OH, —OR ^a1 , —COOH , —NH ₂ , —NHR ^a1 , —N (R ^a1 ) ₂ , fluorine, or chlorine, where R ^a1 is alkyl having 1 to 15 carbons, and in this alkyl, at least 1 Two —CH ₂ — may be replaced by —C≡C—, —CH═CH—, —COO—, —OCO—, —CO—, or —O—, in which at least one of Hydrogen may be replaced by fluorine or chlorine; Sp ⁴ is a single bond, —CH ₂ CH ₂ —, —CH ₂ CH ₂ CH ₂ —, —CH ₂ O—, or —OCH ₂ —; Sp ⁷ is a single bond or alkylene having 1 to 5 carbon atoms, in which —CH ₂ — may be replaced by —O— or —NH—; s is 0, 1, 2, 3, X ³ is —OH, —COOH, —SH, —OCH ₃ , or —NH ₂ ; X ⁴ is a single bond or —O—.

式（５−１−１）から式（５−１−２９）において、Ｒ^１３は、炭素数４から２０のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−ＣＨ＝ＣＨ−、−ＣＦ＝ＣＨ−、−ＣＨ＝ＣＦ−、−Ｃ≡Ｃ−、または炭素数３から８のシクロアルキレンで置き換えられてもよく、これらの基において、少なくとも１つの水素はフッ素または塩素で置き換えられてもよい。Item 16. Item 14. The liquid crystal composition according to item 11 or 13, wherein the first additive is a compound selected from the group of compounds represented by formulas (5-1-1) to (5-1-29).

In the formulas (5-1-1) to (5-1-29), R ¹³ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — is —CH═CH -, -CF = CH-, -CH = CF-, -C≡C-, or cycloalkylene having 3 to 8 carbon atoms, in which at least one hydrogen is fluorine or chlorine It may be replaced.

Item 17. Item 17. The liquid crystal composition according to any one of items 1 to 16, wherein the ratio of the first additive is in the range of 0.05% by weight to 10% by weight based on the weight of the liquid crystal composition.

式（６）において、環Ｔおよび環Ｖは独立して、シクロヘキシル、シクロヘキセニル、フェニル、１−ナフチル、２−ナフチル、テトラヒドロピラン−２−イル、１，３−ジオキサン−２−イル、ピリミジン−２−イル、またはピリジン−２−イルであり、これらの環において、少なくとも１つの水素は、フッ素、塩素、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数１から１２のアルキルで置き換えられてもよく；環Ｕは、１，４−シクロヘキシレン、１，４−シクロヘキセニレン、１，４−フェニレン、ナフタレン−１，２−ジイル、ナフタレン−１，３−ジイル、ナフタレン−１，４−ジイル、ナフタレン−１，５−ジイル、ナフタレン−１，６−ジイル、ナフタレン−１，７−ジイル、ナフタレン−１，８−ジイル、ナフタレン−２，３−ジイル、ナフタレン−２，６−ジイル、ナフタレン−２，７−ジイル、テトラヒドロピラン−２，５−ジイル、１，３−ジオキサン−２，５−ジイル、ピリミジン−２，５−ジイル、またはピリジン−２，５−ジイルであり、これらの環において、少なくとも１つの水素は、フッ素、塩素、炭素数１から１２のアルキル、炭素数１から１２のアルコキシ、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数１から１２のアルキルで置き換えられてもよく；Ｚ^１２およびＺ^１３は独立して、単結合または炭素数１から１０のアルキレンであり、このアルキレンにおいて、少なくとも１つの−ＣＨ_２−は、−Ｏ−、−ＣＯ−、−ＣＯＯ−、または−ＯＣＯ−で置き換えられてもよく、そして少なくとも１つの−ＣＨ_２ＣＨ_２−は、−ＣＨ＝ＣＨ−、−Ｃ（ＣＨ_３）＝ＣＨ−、−ＣＨ＝Ｃ（ＣＨ_３）−、または−Ｃ（ＣＨ_３）＝Ｃ（ＣＨ_３）−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく；Ｐ^４、Ｐ^５、およびＰ^６は、重合性基であり；Ｓｐ^９、Ｓｐ^１０、およびＳｐ^１１は独立して、単結合または炭素数１から１０のアルキレンであり、このアルキレンにおいて、少なくとも１つの−ＣＨ_２−は、−Ｏ−、−ＣＯＯ−、−ＯＣＯ−、または−ＯＣＯＯ−で置き換えられてもよく、そして少なくとも１つの−ＣＨ_２ＣＨ_２−は、−ＣＨ＝ＣＨ−または−Ｃ≡Ｃ−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく；ｔは０、１、または２であり；ｕ、ｖ、およびｗは独立して、０、１、２、３、または４であり、そしてｕ、ｖ、およびｗの和は、１以上である。Item 18. Item 18. The liquid crystal composition according to any one of items 1 to 17, comprising a polymerizable compound represented by formula (6) as the second additive.

In formula (6), ring T and ring V are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine- 2-yl or pyridin-2-yl, and in these rings, at least one hydrogen is fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or at least one hydrogen. C 1-12 alkyl substituted with fluorine or chlorine may be substituted; ring U may be 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1, 2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1, -Diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5- Diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl, or pyridine-2,5-diyl, in which at least one hydrogen is fluorine, chlorine, carbon number 1 to 12 alkyl, 1 to 12 carbon alkoxy, or at least one hydrogen may be replaced by 1 to 12 carbon alkyl substituted with fluorine or chlorine; Z ¹² and Z ¹³ are independently is a single bond or alkylene having 1 to 10 carbon atoms, in the alkylene, at least one of _-CH 2 -, -O -, - CO- -COO-, or it may be replaced by -OCO-, and at least one _-CH 2 CH ₂ - _{is, -CH = CH -, - C} (CH 3) = CH -, - CH = C (CH 3 ) —, Or —C (CH ₃ ) ═C (CH ₃ ) —, in which at least one hydrogen may be replaced by fluorine or chlorine; P ⁴ , P ⁵ , And P ⁶ are polymerizable groups; Sp ⁹ , Sp ¹⁰ , and Sp ¹¹ are each independently a single bond or alkylene having 1 to 10 carbon atoms, and in the alkylene, at least one —CH ₂ — It is, -O -, - COO -, - OCO-, or may be replaced by -OCOO-, and at least one _-CH 2 CH ₂ - is replaced by -CH = CH- or -C≡C- In these groups, at least one hydrogen may be replaced by fluorine or chlorine; t is 0, 1, or 2; u, v, and w are independently 0, 1, 2, 3, or 4 and the sum of u, v, and w is 1 or greater.

式（Ｐ−１）から式（Ｐ−５）において、Ｍ^１、Ｍ^２、およびＭ^３は独立して、水素、フッ素、炭素数１から５のアルキル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数１から５のアルキルである。Item 19. In formula (6) according to item 18, P ⁴ , P ⁵ and P ⁶ are each independently selected from the group of groups represented by formula (P-1) to formula (P-5) Item 19. The liquid crystal composition according to item 18, which is a group.

In formulas (P-1) to (P-5), M ¹ , M ² , and M ³ are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or at least one hydrogen is fluorine or chlorine 1-5 alkyl substituted with

式（６−１）から式（６−２８）において、Ｐ^４、Ｐ^５、およびＰ^６は独立して、式（Ｐ−１）から式（Ｐ−３）で表される基の群から選択された重合性基であり、

ここでＭ^１、Ｍ^２、およびＭ^３は独立して、水素、フッ素、炭素数１から５のアルキル、または少なくとも１つの水素がフッ素または塩素で置き換えられた炭素数１から５のアルキルであり；Ｓｐ^９、Ｓｐ^１０、およびＳｐ^１１は独立して、単結合または炭素数１から１０のアルキレンであり、このアルキレンにおいて、少なくとも１つの−ＣＨ_２−は、−Ｏ−、−ＣＯＯ−、−ＯＣＯ−、または−ＯＣＯＯ−で置き換えられてもよく、そして少なくとも１つの−ＣＨ_２ＣＨ_２−は、−ＣＨ＝ＣＨ−または−Ｃ≡Ｃ−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよい。Item 20. Item 20. The liquid crystal composition according to any one of items 1 to 19, comprising a polymerizable compound selected from the group of compounds represented by formulas (6-1) to (6-28) as a second additive. object.

In formula (6-1) to formula (6-28), P ⁴ , P ⁵ and P ⁶ are independently from the group of groups represented by formula (P-1) to formula (P-3). A selected polymerizable group;

Wherein M ¹ , M ² , and M ³ are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine. Sp ⁹ , Sp ¹⁰ and Sp ¹¹ are each independently a single bond or alkylene having 1 to 10 carbons, in which at least one —CH ₂ — represents —O—, —COO—, —; OCO—, or —OCOO— may be replaced, and at least one —CH ₂ CH ₂ — may be replaced with —CH═CH— or —C≡C—, and in these groups, at least One hydrogen may be replaced with fluorine or chlorine.

Item 21. Item 21. The liquid crystal composition according to any one of items 18 to 20, wherein the ratio of the second additive is in the range of 0.03% by weight to 10% by weight based on the weight of the liquid crystal composition.

Item 22. Item 22. A liquid crystal display device comprising the liquid crystal composition according to any one of items 1 to 21.

Item 23. Item 23. The liquid crystal display device according to item 22, wherein the operation mode of the liquid crystal display device is an IPS mode, a VA mode, an FFS mode, or an FPA mode, and the driving method of the liquid crystal display device is an active matrix method.

Item 24. Item 22. A liquid crystal display element of a polymer-supported alignment type, comprising the liquid crystal composition according to any one of items 1 to 21, wherein a polymerizable compound in the liquid crystal composition is polymerized.

Item 25. Item 22. A liquid crystal display element having no alignment film, comprising the liquid crystal composition according to any one of items 1 to 21, wherein the polymerizable compound in the liquid crystal composition is polymerized.

Item 26. Item 22. Use of the liquid crystal composition according to any one of items 1 to 21 in a liquid crystal display device.

Item 27. Item 22. Use of the liquid crystal composition according to any one of items 1 to 21 in a polymer-supported alignment type liquid crystal display device.

Item 28. Item 22. Use of the liquid crystal composition according to any one of items 1 to 21 in a liquid crystal display device having no alignment film.

  The present invention also includes the following items. (A) The liquid crystal composition described above is placed between two substrates, light is applied to the composition while voltage is applied, and the polymerizable compound contained in the composition is polymerized, thereby Of manufacturing a liquid crystal display element. (B) The upper limit temperature of the nematic phase is 70 ° C or higher, the optical anisotropy at a wavelength of 589 nm (measured at 25 ° C) is 0.08 or higher, and the dielectric anisotropy at a frequency of 1 kHz (measured at 25 ° C) ) Is −2 or less.

  The present invention also includes the following items. (C) The compounds (5) to (7) described in JP-A-2006-199941 are liquid crystal compounds having a positive dielectric anisotropy, but at least selected from the group of these compounds A composition as described above containing one compound. (D) The above composition comprising at least two of the above polar compounds. (E) The above composition further comprising a polar compound different from the above polar compound. (F) One, two, or at least three of additives such as optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, polar compounds A composition as described above containing one. (G) An AM device containing the above composition. (H) A device containing the above composition and having a TN, ECB, OCB, IPS, FFS, VA, or FPA mode. (I) A transmissive element containing the above composition. (J) The above composition is used as a composition having a nematic phase. (K) Use as an optically active composition by adding an optically active compound to the above composition.

  The composition of the present invention will be described in the following order. First, the composition of the composition will be described. Second, the main characteristics of the component compounds and the main effects of the compounds on the composition will be explained. Third, the combination of components in the composition, the preferred ratio of the components, and the basis thereof will be described. Fourth, a preferred form of the component compound will be described. Fifth, preferred component compounds are shown. Sixth, additives that may be added to the composition will be described. Seventh, a method for synthesizing the component compounds will be described. Finally, the use of the composition will be described.

  First, the composition of the composition will be described. The composition of the present invention is classified into Composition A and Composition B. The composition A may further contain other liquid crystal compounds, additives and the like in addition to the liquid crystal compounds selected from the compound (1), the compound (2), and the compound (3). The “other liquid crystal compound” is a liquid crystal compound different from the compound (1), the compound (2), and the compound (3). Such compounds are mixed into the composition for the purpose of further adjusting the properties. Additives include optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, polar compounds and the like.

  Composition B consists essentially of a liquid crystalline compound selected from compound (1), compound (2), and compound (3). “Substantially” means that the composition may contain an additive but no other liquid crystal compound. Composition B has fewer components than composition A. From the viewpoint of reducing the cost, the composition B is preferable to the composition A. The composition A is preferable to the composition B from the viewpoint that the characteristics can be further adjusted by mixing other liquid crystal compounds.

  Second, the main characteristics of the component compounds and the main effects of the compounds on the characteristics of the composition will be explained. The main characteristics of the component compounds are summarized in Table 2 based on the effects of the present invention. In the symbols in Table 2, L means large or high, M means moderate, and S means small or low. The symbols L, M, and S are classifications based on a qualitative comparison among the component compounds, and the symbol 0 means that the value is zero or close to zero.

  When component compounds are mixed into the composition, the main effects of the component compounds on the properties of the composition are as follows. Compound (1) increases the dielectric anisotropy. Compound (2) decreases the viscosity. Compound (3) increases the dielectric anisotropy and decreases the minimum temperature. The compound (4) or the compound (5) is adsorbed on the substrate surface by the action of the polar group and controls the alignment of the liquid crystal molecules. In order to obtain the desired effect, it is essential that these compounds have high compatibility with liquid crystal compounds. Compound (6) gives a polymer by polymerization. This polymer stabilizes the alignment of the liquid crystal molecules, thereby reducing the response time of the device and improving image burn-in.

  Third, the combination of components in the composition, the preferred ratio of the components, and the basis thereof will be described. A preferred combination of components in the composition is compound (1) + compound (2), compound (1) + compound (2) + compound (3). A more preferred combination is compound (1) + compound (2) + compound (3). By combining such a composition with a polar compound and a polymerizable compound (or a polymer thereof), vertical alignment of liquid crystal molecules is achieved. If the “other liquid crystalline compound” is in a small amount, the same effect can be achieved even if it is added to such a composition.

  A desirable ratio of compound (1) is approximately 5% by weight or more for increasing the dielectric anisotropy, and approximately 85% by weight or less for decreasing the viscosity. A more desirable ratio is in the range of approximately 10% by weight to approximately 80% by weight. A particularly preferred ratio is in the range of approximately 15% by weight to approximately 75% by weight.

  A desirable ratio of compound (2) is approximately 5% by weight or more for increasing the maximum temperature or decreasing the viscosity, and approximately 65% by weight or less for increasing the dielectric anisotropy. A more desirable ratio is in the range of approximately 10% by weight to approximately 60% by weight. A particularly preferred ratio is in the range of approximately 15% by weight to approximately 55% by weight.

  A desirable ratio of compound (3) is approximately 5% by weight or more for increasing the dielectric anisotropy, and approximately 60% by weight or less for decreasing the minimum temperature. A more desirable ratio is in the range of approximately 5% by weight to approximately 50% by weight. A particularly preferred ratio is in the range of approximately 5% by weight to approximately 45% by weight.

  Compound (4) and compound (5) are added to the composition for the purpose of controlling the alignment of the liquid crystal molecules. A desirable ratio of compound (4) or compound (5) is approximately 0.05% by weight or more for aligning liquid crystal molecules, and approximately 10% by weight or less for preventing display defects of the device. A more desirable ratio is in the range of approximately 0.1% by weight to approximately 7% by weight. A particularly desirable ratio is in the range of approximately 0.5% by weight to approximately 5% by weight.

  Compound (6) is added to the composition for the purpose of adapting it to a polymer-supported orientation type device. A desirable ratio of compound (6) is approximately 0.03% by weight or more for improving the long-term reliability of the element, and approximately 10% by weight or less for preventing display defects of the element. A more desirable ratio is in the range of approximately 0.1% by weight to approximately 2% by weight. A particularly preferred ratio is in the range of approximately 0.2% by weight to approximately 1.0% by weight.

Fourth, a preferred form of the component compound will be described. In Formula (1), Formula (2), and Formula (3), R ¹ is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine. is there. R ² is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyloxy having 2 to 12 carbons. Desirable R ² is alkyl having 1 to 12 carbons for increasing the stability, and alkoxy having 1 to 12 carbons for increasing the dielectric anisotropy.

R ³ and R ⁴ are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or carbon 2 having at least one hydrogen replaced with fluorine or chlorine. To 12 alkenyl. Desirable R ³ or R ⁴ is alkyl having 1 to 12 carbons for increasing the stability to ultraviolet light or heat, and alkenyl having 2 to 12 carbons for decreasing the minimum temperature or decreasing the viscosity. . R ⁵ and R ⁶ are independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons. Desirable R ⁵ or R ⁶ is alkyl having 1 to 12 carbons for increasing the stability, and alkoxy having 1 to 12 carbons for increasing the dielectric anisotropy. The alkyl of the liquid crystal compound is linear or branched and does not include cyclic alkyl. Linear alkyl is preferred over branched alkyl. The same applies to terminal groups such as alkoxy and alkenyl.

  Preferred alkyl is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, or octyl. More desirable alkyl is ethyl, propyl, butyl, pentyl, or heptyl for decreasing the viscosity.

  Preferred alkoxy is methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, or heptyloxy. More desirable alkoxy is methoxy or ethoxy for decreasing the viscosity.

  Preferred alkenyl is vinyl, 1-propenyl, 2-propenyl, 1-butenyl, 2-butenyl, 3-butenyl, 1-pentenyl, 2-pentenyl, 3-pentenyl, 4-pentenyl, 1-hexenyl, 2-hexenyl, 3-hexenyl, 4-hexenyl, or 5-hexenyl. More desirable alkenyl is vinyl, 1-propenyl, 3-butenyl or 3-pentenyl for decreasing the viscosity. The preferred configuration of —CH═CH— in these alkenyls depends on the position of the double bond. Trans is preferable in alkenyl such as 1-propenyl, 1-butenyl, 1-pentenyl, 1-hexenyl, 3-pentenyl and 3-hexenyl for decreasing the viscosity. Cis is preferable in alkenyl such as 2-butenyl, 2-pentenyl and 2-hexenyl.

  Preferred alkenyloxy is vinyloxy, allyloxy, 3-butenyloxy, 3-pentenyloxy, or 4-pentenyloxy. More preferable alkenyloxy is allyloxy or 3-butenyloxy for decreasing the viscosity.

  Preferred examples of alkyl in which at least one hydrogen is replaced by fluorine or chlorine are fluoromethyl, 2-fluoroethyl, 3-fluoropropyl, 4-fluorobutyl, 5-fluoropentyl, 6-fluorohexyl, 7-fluoroheptyl. Or 8-fluorooctyl. Further preferred examples are 2-fluoroethyl, 3-fluoropropyl, 4-fluorobutyl or 5-fluoropentyl for increasing the dielectric anisotropy.

  Preferred examples of alkenyl in which at least one hydrogen is replaced by fluorine or chlorine are 2,2-difluorovinyl, 3,3-difluoro-2-propenyl, 4,4-difluoro-3-butenyl, 5,5-difluoro. -4-pentenyl, or 6,6-difluoro-5-hexenyl. Further preferred examples are 2,2-difluorovinyl or 4,4-difluoro-3-butenyl for decreasing the viscosity.

Ring A and Ring C are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, at least one hydrogen is replaced by fluorine or chlorine 1,4-phenylene, naphthalene-2,6-diyl, naphthalene-2,6-diyl, chroman-2,6-diyl, in which at least one hydrogen is replaced by fluorine or chlorine, or at least one hydrogen Chroman-2,6-diyl replaced with fluorine or chlorine. Preferred ring A or ring C is 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2, 3-difluoro-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl, or 7,8-difluorochroman-2,6-diyl. More preferred ring A or ring C is 1,4-cyclohexylene or 1,4-phenylene. Among these rings, preferred ring A or ring C is 1,4-cyclohexylene for decreasing the viscosity, tetrahydropyran-2,5-diyl for increasing the dielectric anisotropy, and optical anisotropy. 1,4-phenylene for increasing the properties. The configuration of 1,4-cyclohexylene is preferably trans rather than cis for increasing the maximum temperature. Tetrahydropyran-2,5-diyl is

  Ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4, 5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl. Preferred ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, or 7,8-difluorochroman-2,6-diyl. More preferred ring B is 2,3-difluoro-1,4-phenylene or 2-chloro-3-fluoro-1,4-phenylene. Particularly preferred ring B is 2,3-difluoro-1,4-phenylene. Among these rings, preferred ring B is 2,3-difluoro-1,4-phenylene for decreasing the viscosity, and 2-chloro-3-fluoro-1,4-phenylene for decreasing the optical anisotropy. And 7,8-difluorochroman-2,6-diyl for increasing the dielectric anisotropy.

  Ring D and ring E are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5-difluoro-1,4-phenylene. Preferred ring D or ring E is 1,4-cyclohexylene for decreasing the viscosity or increasing the maximum temperature, and 1,4-phenylene for decreasing the minimum temperature. The configuration of 1,4-cyclohexylene is preferably trans rather than cis for increasing the maximum temperature.

  Ring F and Ring I are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, at least one hydrogen is replaced by fluorine or chlorine 1,4-phenylene, naphthalene-2,6-diyl, naphthalene-2,6-diyl, chroman-2,6-diyl, in which at least one hydrogen is replaced by fluorine or chlorine, or at least one hydrogen Chroman-2,6-diyl replaced with fluorine or chlorine. Preferred ring F or ring I is 1,4-cyclohexylene, 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2, 3-difluoro-1,4-phenylene, 3,4,5-trifluoronaphthalene, or 7,8-difluorochroman-2,6-diyl. More preferred ring F or ring I is 1,4-cyclohexylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4. -Phenylene or 7,8-difluorochroman-2,6-diyl. Particularly preferred ring F or ring I is 1,4-cyclohexylene or 1,4-phenylene. Among these rings, preferred ring F or ring I is 1,4-cyclohexylene for decreasing the viscosity, tetrahydropyran-2,5-diyl for increasing the dielectric anisotropy, and optical anisotropy. 1,4-phenylene for increasing the properties.

  Ring G is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4, 5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl. Preferred ring G is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, or 7,8-difluorochroman-2,6-diyl. Further preferred ring G is 2,3-difluoro-1,4-phenylene. Among these rings, preferred ring G is 2,3-difluoro-1,4-phenylene for decreasing the viscosity, and 2-chloro-3-fluoro-1,4-phenylene for decreasing the optical anisotropy. And 7,8-difluorochroman-2,6-diyl for increasing the dielectric anisotropy.

Z ¹ and Z ² are each independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—. Desirable Z ¹ or Z ² is a single bond for decreasing the viscosity, —CH ₂ CH ₂ — for decreasing the minimum temperature, and —CH ₂ O— or —OCH for increasing the dielectric anisotropy. _2- . Z ³ is a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—. Desirable Z ³ is a single bond for decreasing the viscosity, —CH ₂ CH ₂ — for decreasing the minimum temperature, and —COO— or —OCO— for increasing the maximum temperature. Z ⁴ and Z ⁵ are each independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—. Preferred Z ⁴ or Z ⁵ is a single bond for decreasing the viscosity, —CH ₂ CH ₂ — for decreasing the minimum temperature, and —CH ₂ O— or —OCH for increasing the dielectric anisotropy. _2- .

  a is 1, 2 or 3, b is 0 or 1, and the sum of a and b is 3 or less. Preferred a is 1 for decreasing the viscosity, and 2 or 3 for increasing the maximum temperature. Preferred b is 0 for decreasing the viscosity, and 1 for decreasing the minimum temperature. c is 1, 2 or 3. Preferred c is 1 for decreasing the viscosity, and 2 or 3 for increasing the maximum temperature. d is 1, 2, or 3; e is 0 or 1; and the sum of d and e is 3 or less. Preferred d is 1 for decreasing the viscosity, and 2 or 3 for increasing the maximum temperature. Preferred e is 0 for decreasing the viscosity, and 1 for decreasing the minimum temperature.

  In the formula (4), MES is a mesogenic group having at least one ring. Mesogenic groups are well known to those skilled in the art. The mesogenic group means a moiety that contributes to the formation of a liquid crystal phase when the compound has a liquid crystal phase (intermediate phase). A preferred example of compound (4) is compound (4-1).

In Formula (5), R ⁷ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — is —CH═CH—, —CF═CH—, —CH═CF—, -C≡C-, or cycloalkylene having 3 to 8 carbon atoms may be substituted, and in these groups, at least one hydrogen may be substituted with fluorine or chlorine. x is 1 or 2, preferably 1.

Preferred R ⁷ is alkyl having 4 to 20 carbons. More desirable R ⁷ is alkyl having 6 to 18 carbons. At least one —CH ₂ — may be replaced by —CH═CH—, —CF═CH—, —CH═CF—, —C≡C—, or —O—, and at least one hydrogen is It may be replaced with fluorine or chlorine.

In Formula (4) and Formula (5), R ⁸ is a polar group. Compound (4) and compound (5) are preferably stable because they are added to the composition. When compound (4) and compound (5) are added to the composition, it is preferable that this compound does not lower the voltage holding ratio of the device. It is preferable that the compound (4) and the compound (5) have low volatility. A preferred molar mass is 130 g / mol or more. A more preferred molar mass is in the range of 150 g / mol to 500 g / mol.

  The polar group has a non-covalent interaction with the surface of the glass substrate or metal oxide film. Preferred polar groups have a heteroatom selected from the group of nitrogen, oxygen, sulfur, and phosphorus. Preferred polar groups have at least one, or at least two of these heteroatoms. Further preferred polar groups include hydrogen from compounds selected from the group of alcohols, primary, secondary, and tertiary amines, ketones, carboxylic acids, thiols, esters, ethers, thioethers, and combinations thereof. It is a monovalent group derived by removing. The structure of these groups may be linear, branched, cyclic, or a combination thereof. Particularly preferred polar groups have at least one oxygen atom of OH structure or nitrogen atom of a primary, secondary or tertiary amine structure. The most preferred polar group is a hydroxy group (carbon-OH).

Examples of polar groups ^{R 8} is a group represented by the formula (A1) in formula (A4).

In formula (A1) to formula (A4), Sp ⁴ , Sp ⁶ , and Sp ⁷ are independently a single bond or a group (—Sp ″ -X ″ —), and X ″ is a ring It binds to P. Sp ″ is alkylene having 1 to 20 carbons, and preferably alkylene having 1 to 12 carbons, in which at least one —CH ₂ — is —O—, —S—, —NH—. , —N (R ⁰ ) —, —CO—, —CO—O—, —O—CO, —O—CO—O—, —S—CO—, —CO—S—, —N (R ⁰ ). Replaced by —CO—O—, —O—CO—N (R ⁰ ) —, —N (R ⁰ ) —CO—N (R ⁰ ) —, —CH═CH—, or —C≡C—. In these groups, at least one hydrogen may be replaced by fluorine, chlorine, or —CN, and X ″ represents —O—, —S—, —CO—, —CO—O—. ^{, -O-CO -, - O} -CO-O -, - CO-N (R 0) -, - N (R 0) -CO -, - N (R 0) -CO-N (R _{) -, - OCH 2 -,} - CH 2 O -, - SCH 2 -, - CH 2 S -, - CF 2 O -, - OCF 2 -, - CF 2 S -, - SCF 2 -, - CF 2 _{CH 2 -, - CH 2 CF} 2 -, - CF 2 CF 2 -, - CH = N -, - N = CH -, - N = N -, - CH = CR 0 -, - CY 2 = CY 3 - , —C≡C—, —CH═CH—CO—O—, —O—CO—CH═CH—, or a single bond, wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbons. , Y ² and Y ³ are independently hydrogen, fluorine, chlorine, or —CN. Preferred X ″ is —O—, —S—, —CO—, —COO—, —OCO—, —O—COO—, —CO—NR ⁰ —, —NR ⁰ —CO—, —NR ⁰ —. CO—NR ⁰ — or a single bond. Sp ⁵ is>CH-,> CR ^a1 -,> N-, or> C <. That is, Sp ⁵ in formula (A2) is>CH-,> CR ^a1- , or> N-, and Sp ⁵ in formula (A3) means> C <.

Preferred Sp ″ is — (CH ₂ ) _p1 —, — (CH ₂ CH ₂ O) _{q 1} —CH ₂ CH ₂ —, —CH ₂ CH ₂ —S—CH ₂ CH ₂ —, or —CH ₂ CH _2. —NHCH ₂ CH ₂ —, where p1 is an integer from 1 to 12 and q1 is an integer from 1 to 3. Preferred groups (—Sp ″ —X ″ —) are — (CH ₂ ) _p1 —, — (CH ₂ ) _p1 —O—, — (CH ₂ ) _p1 —O—CO—, — (CH ₂ ). _p1- O-CO-O-, where p1 and q1 have the meanings indicated above. Further preferred groups Sp ″ are ethylene, propylene, butylene, pentylene, hexylene, heptylene, octylene, nonylene, decylene, undecylene, dodecylene, octadecylene, ethyleneoxyethylene, methyleneoxybutylene, ethylenethioethylene, ethylene-N-methylimino. Ethylene, 1-methylalkylene, ethenylene, propenylene, and butenylene.

であり、ここでＲ^ａ１は、炭素数１から１５のアルキルであり、このアルキルにおいて、少なくとも１つの−ＣＨ_２−は、−Ｃ≡Ｃ−、−ＣＨ＝ＣＨ−、−ＣＯＯ−、−ＯＣＯ−、−ＣＯ−、または−Ｏ−で置き換えられてもよく、これらの基において、少なくとも１つの水素は、フッ素または塩素で置き換えられてもよく、Ｒ^０は、水素または炭素数１から１２のアルキルである。X ¹ is —NH ₂ , —NHR ^a1 , —N (R ^a1 ) ₂ , —OR ^a1 , —OH, —COOH, —SH, —SR ^a1 ,

Where R ^a1 is alkyl having 1 to 15 carbons, and in this alkyl, at least one —CH ₂ — is —C≡C—, —CH═CH—, —COO—, —OCO. -, -CO-, or -O-, in which at least one hydrogen may be replaced by fluorine or chlorine, and R ⁰ is hydrogen or C ^1-12 Alkyl.

X ² is, -O -, - CO -, - NH -, - NR a1 -, - S-, or a single bond, ^{Z 9} is fat alkylene 1 to 15 carbon atoms, from 5 to 6 carbon atoms Represents a cyclic group or a combination of at least one ring and alkylene, in which at least one hydrogen is —OH, —OR ^a1 , —COOH, —NH ₂ , —NHR ^a1 , —N ( R ^a1 ) ₂ , fluorine, or chlorine may be substituted, and R ^a1 has the meaning indicated above. p is 0, 1, 2, or 3. q is 2, 3, 4, or 5.

Ring P is an aromatic group having 6 to 25 carbon atoms or an alicyclic group having 3 to 25 carbon atoms, and these groups may be condensed rings, and in these groups, 1 to 3 hydrogen atoms ^May be replaced by R ^L. R ^L is —OH, — (CH ₂ ) _r —OH, fluorine, chlorine, —CN, —NO ₂ , —NCO, —NCS, —OCN, —SCN, —C (═O) N (R ⁰ ). ₂ , —C (═O) R ⁰ , —N (R ⁰ ) ₂ , — (CH ₂ ) _r —N (R ⁰ ) ₂ , —SH, —SR ⁰ , aryl having 6 to 20 carbon atoms, carbon number 6 to 20 heteroaryl, C1 to C25 alkyl, C1 to C25 alkoxy, C2 to C25 alkylcarbonyl, C2 to C25 alkoxycarbonyl, C2 to C25 alkylcarbonyloxy Or alkoxycarbonyloxy having 2 to 25 carbons, in which at least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is hydrogen or an alkyl having 1 to 12 carbons. It is a kill.

Particularly preferred nitrogen-containing groups R ⁸ are —NH ₂ , —NH— (CH ₂ ) _{n 3} H, — (CH ₂ ) _n —NH ₂ , — (CH ₂ ) _n —NH— (CH ₂ ) _{n 3} H, — _{NH- (CH 2) n -NH 2} , -NH- (CH 2) n -NH- (CH 2) n3 H, - (CH 2) n1 -NH- (CH 2) n2 -NH 2, - (CH _{2) n1 -NH- (CH 2)} n2 -NH- (CH 2) n3 H, -O- (CH 2) n -NH 2, - (CH 2) n1 -O- (CH 2) n -NH 2 _{, - (CH 2) n1 -NH-} (CH 2) n2 -OH, -O- (CH 2) n1 -NH- (CH 2) n2 -NH 2, -O- (CH 2) n1 -NH- ( CH _{2) n2} -OH, or _{- (CH 2) n1 -NH- (} CH 2) n2 -NH- (C ₂₎ an _n3 H, wherein n, n1, n2, and n3 are independently integers of 1 to 12, preferably 1, 2, 3 or 4,.

Particularly preferred nitrogen-free groups R ⁸ are —OH, — (CH ₂ ) _n —OH, —O— (CH ₂ ) _n —OH, — [O— (CH ₂ ) _n1 —] _n2 —OH, —COOH. , — (CH ₂ ) _n —COOH, —O— (CH ₂ ) _n —COOH, or — [O— (CH ₂ ) _n1 —] _n2 —COOH, where n, n1, and n2 are independently And an integer of 1 to 12, preferably 1, 2, 3, or 4.

From the viewpoint of high solubility in the liquid crystal composition, R ⁸ is particularly preferably —OH or —NH ₂ . -OH is preferable to -O-, -CO-, or -COO- because -OH has a high anchoring force. Groups having a plurality of heteroatoms (nitrogen, oxygen) are particularly preferred. The compound having such a polar group is effective even at a low concentration.

In Formula (4-1), R ⁹ is hydrogen, fluorine, chlorine, or alkyl having 1 to 25 carbons, and in this alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, or cycloalkylene having 3 to 8 carbon atoms may be substituted, and at least one third The secondary carbon (> CH—) may be replaced with nitrogen (> N—), in which at least one hydrogen may be replaced with fluorine or chlorine, where R ⁰ is hydrogen Or alkyl having 1 to 12 carbons.

R ¹⁰ is alkyl having 1 to 25 carbons, and in this alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—, —S—, —CO—, —COO—, —OCO. -, -OCOO-, or cycloalkylene having 3 to 8 carbon atoms, where R ⁰ is hydrogen or alkyl having 1 to 12 carbon atoms, and at least one tertiary carbon (> CH -) May be replaced by nitrogen (> N-) and at least one hydrogen may be replaced by fluorine or chlorine, provided that R ¹⁰ is an oxygen atom of OH structure, a sulfur atom of SH structure Or having at least one nitrogen atom of a primary, secondary, or tertiary amine structure.

Ring J and Ring K are independently an aromatic group having 6 to 25 carbon atoms, a heteroaromatic group having 5 to 25 carbon atoms, an alicyclic group having 3 to 25 carbon atoms, or a complex having 4 to 25 carbon atoms. Alicyclic groups, these groups may be fused rings, in which at least one hydrogen may be replaced by a group T, wherein the group T is —OH, — (CH _{2) i} -OH, fluorine, _{chlorine, -CN, -NO 2, -NCO,} -NCS, -OCN, -SCN, -C (= O) N (R 0) 2, -C (= O) R 0 , —N (R ⁰ ) ₂ , — (CH ₂ ) _i —N (R ⁰ ) ₂ , aryl having 6 to 20 carbon atoms, heteroaryl having 6 to 20 carbon atoms, alkyl having 1 to 25 carbon atoms, carbon number 1 to 25 alkoxy, 2 to 25 carbon alkylcarbonyl, 2 to 25 carbon Aryloxycarbonyl, an alkoxycarbonyloxy alkylcarbonyloxy or C 2 to 25, from 2 to 25 carbon atoms, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine, where R ⁰ is hydrogen or alkyl having 1 to 12 carbons, and i is 1, 2, 3, or 4.

Z ⁶ represents —O—, —S—, —CO—, —CO—O—, —OCO—, —O—CO—O—, —OCH ₂ —, —CH ₂ O—, —SCH ₂ —, _{-CH 2 S -, - CF 2} O -, - OCF 2 -, - CF 2 S -, - SCF 2 -, - (CH 2) i -, - CF 2 CH 2 -, - CH 2 CF 2 -, — (CF ₂ ) _i —, —CH═CH—, —CF═CF—, —C≡C—, —CH═CH—COO—, —OCO—CH═CH—, —C (R ⁰ ) ₂ — , Or a single bond, wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbons, and i is 1, 2, 3, or 4.

  f is 0, 1, 2, 3, 4, or 5.

In Formula (5-1), R ¹³ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — is —CH═CH—, —CF═CH—, —CH═. It may be replaced by CF-, -C≡C-, or cycloalkylene having 3 to 8 carbon atoms, and in these groups, at least one hydrogen may be replaced by fluorine or chlorine.

R ¹⁴ is alkyl having 1 to 25 carbons, and in this alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—, —S—, —CO—, —COO—, —OCO. -, -OCOO-, or cycloalkylene having 3 to 8 carbon atoms, where R ⁰ is hydrogen or alkyl having 1 to 12 carbon atoms, and at least one tertiary carbon (> CH -) May be replaced by nitrogen (> N-) and at least one hydrogen may be replaced by fluorine or chlorine, provided that R ¹⁴ is an oxygen atom of OH structure, a sulfur atom of SH structure And at least one nitrogen atom of a primary, secondary, or tertiary amine structure.

In the formulas (4-1-1) to (4-1-4), R ¹⁵ is alkyl having 1 to 8 carbons or fluorine. Ring Q and Ring R are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2-fluoro-1,3-phenylene, 2-ethyl-1,4. -Phenylene, 2,6-diethyl-1,4-phenylene, 2-trifluoromethyl-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene 2,6-difluoro-1,4-phenylene or 2,3,5,6-tetrafluoro-1,4-phenylene. Ring S is cyclohexyl or phenyl.

Z ¹⁰ is a single bond, —CH ₂ CH ₂ —, —COO—, or —OCO—. Z ¹¹ is a single bond, alkylene having 1 to 15 carbons, alicyclic group having 5 or 6 carbons, or a combination thereof, and in these groups, at least one hydrogen is —OH, —OR ^a1 , —COOH, —NH ₂ , —NHR ^a1 , —N (R ^a1 ) ₂ , fluorine, or chlorine; R ^a1 is alkyl having 1 to 15 carbons, in which at least One —CH ₂ — may be replaced by —C≡C—, —CH═CH—, —COO—, —OCO—, —CO—, or —O—, and in these groups, at least 1 One hydrogen may be replaced with fluorine or chlorine.

Sp ⁴ is a single bond, —CH ₂ CH ₂ —, —CH ₂ CH ₂ CH ₂ —, —CH ₂ O—, or —OCH ₂ —. Sp ⁷ is a single bond or alkylene having 1 to 5 carbon atoms, and in this alkylene, —CH ₂ — may be replaced by —O— or —NH—. X ³ is —OH, —COOH, —SH, —OCH ₃ , or —NH ₂ . X ⁴ is a single bond or —O—. s is 0, 1, 2, 3, 4, or 5.

  An aromatic group refers to aryl or substituted aryl. Heteroaryl represents an aromatic group having at least one heteroatom. Aryl and heteroaryl may be monocyclic or polycyclic. That is, these groups have at least one ring, which may be fused (eg, naphthyl), the two rings may be covalently linked (eg, biphenyl), or the fused ring and linked It may have a combination of rings. Preferred heteroaryls have at least one heteroatom selected from the group of nitrogen, oxygen, sulfur, and phosphorus.

  Preferred aryl or heteroaryl has 6 to 25 carbon atoms and may be a 5-membered, 6-membered or 7-membered ring. Preferred aryl or heteroaryl may be monocyclic, bicyclic or tricyclic. These groups may be condensed rings or may be substituted.

  Preferred aryls are benzene, biphenyl, terphenyl, [1,1 ′: 3 ′, 1 ″] terphenyl, naphthalene, anthracene, binaphthyl, phenanthrene, pyrene, dihydropyrene, chrysene, perylene, tetracene, pentacene, benzopyrene, fluorene. , A monovalent group derived by removing one hydrogen from indene, indenofluorene, spirobifluorene.

  Preferred heteroaryls are pyrrole, pyrazole, imidazole, 1,2,3-triazole, 1,2,4-triazole, tetrazole, furan, thiophene, selenophene, oxazole, isoxazole, 1,2-thiazole, 1,3-thiazole. 1,2,3-oxadiazole, 1,2,4-oxadiazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, 1,2,3-thiadiazole, , 2,4-thiadiazole, 1,2,5-thiadiazole, 1,3,4-thiadiazole and the like, or pyridine, pyridazine, pyrimidine, pyrazine, 1,3,5-triazine, 1,2, 4-triazine, 1,2,3-triazine, 1,2,4,5-tetrazine, 1,2,3,4-tetrazine, 1,2, 3,5 tetrazine a monovalent group derived by removing one hydrogen from a six-membered ring compounds such as.

  Preferred heteroaryls are indole, isoindole, indolizine, indazole, benzimidazole, benzotriazole, purine, naphthaimidazole, phenanthrimidazole, pyridaimidazole, pyrazineimidazole, quinoxaline imidazole, benzoxazole, naphthoxazole, anthroxax Sol, phenanthroxazole, isoxazole, benzothiazole, benzofuran, isobenzofuran, dibenzofuran, quinoline, isoquinoline, pteridine, benzo-5,6-quinoline, benzo-6,7-quinoline, benzo-7,8-quinoline, Benzisoquinoline, acridine, phenothiazine, phenoxazine, benzopyridazine, benzopyrimidine, quinoxaline, phenazine, naphthyridine, azaka One of fused ring compounds such as azole, benzocarboline, phenanthridine, phenanthroline, thieno [2,3b] thiophene, thieno [3,2b] thiophene, dithienothiophene, isobenzothiophene, dibenzothiophene, benzothiadiazothiophene It is also a monovalent group derived by removing hydrogen. Preferred heteroaryl is also a monovalent group derived by removing one hydrogen from a ring formed by combining two groups selected from these five-membered, six-membered and condensed rings. These heteroaryls may be substituted with alkyl, alkoxy, thioalkyl, fluorine, fluoroalkyl, aryl, or heteroaryl.

  The alicyclic group may be saturated or unsaturated. That is, these groups may have only a single bond or a combination of a single bond and multiple bonds. Saturated rings are preferred over unsaturated rings.

The alicyclic group may be a single ring or a plurality of rings. Preferable examples of these groups are monocyclic, bicyclic or tricyclic having 3 to 25 carbon atoms, and these groups may be condensed rings or may be substituted. Preferred examples of these groups are five-membered rings, six-membered rings, seven-membered rings, or eight-membered rings, in which at least one carbon may be replaced by silicon, and at least one> CH - it is> may be replaced by N-, and at least one -CH ₂ - may be replaced by -O- or -S-.

  Preferred alicyclic groups are five-membered rings such as cyclopentane, tetrahydrofuran, tetrahydrothiofuran and pyrrolidine, six-membered rings such as cyclohexane, cyclohexene, tetrahydropyran, tetrahydrothiopyran, 1,3-dioxane, 1,3-dithiane and piperidine. 7-membered ring such as cycloheptane, tetrahydronaphthalene, decahydronaphthalene, indane, bicyclo [1.1.1] pentane, bicyclo [2.2.2] octane, spiro [3.3] heptane, octahydro- It is a divalent group derived by removing two hydrogens from a condensed ring such as 4,7-methanoindane.

In the formula (6), P ⁴ , P ⁵ and P ⁶ are independently a polymerizable group. Preferred P ⁴ , P ⁵ , or P ⁶ is a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-5). More desirable P ⁴ , P ⁵ or P ⁶ is a group represented by the formula (P-1), the formula (P-2) or the formula (P-3). Particularly preferred P ⁴ , P ⁵ or P ⁶ is a group represented by the formula (P-1) or the formula (P-2). Most preferred P ⁴ , P ⁵ or P ⁶ is a group represented by the formula (P-1). A preferred group represented by the formula (P-1) is —OCO—CH═CH ₂ or —OCO—C (CH ₃ ) ═CH ₂ . The wavy line from formula (P-1) to formula (P-5) indicates the site to be bound.

In formulas (P-1) to (P-5), M ¹ , M ² , and M ³ are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or at least one hydrogen is fluorine or chlorine 1-5 alkyl substituted with Preferred M ¹ , M ² or M ³ is hydrogen or methyl for increasing the reactivity. More preferred M ¹ is hydrogen or methyl, and more preferred M ² or M ³ is hydrogen.

Sp ⁹ , Sp ¹⁰ , and Sp ¹¹ are each independently a single bond or alkylene having 1 to 10 carbon atoms, and in this alkylene, at least one —CH ₂ — is —O—, —COO—, —OCO. -, or it may be replaced by -OCOO-, and at least one _-CH 2 CH ₂ - may be replaced by -CH = CH- or -C≡C-, and in the groups, at least 1 One hydrogen may be replaced with fluorine or chlorine. Preferred Sp ⁹ , Sp ¹⁰ or Sp ¹¹ is a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, —OCO—, —CO—CH═CH—, or -CH = CH-CO-. Further preferred Sp ⁹ , Sp ¹⁰ , or Sp ¹¹ is a single bond.

  Ring T and Ring V are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxan-2-yl, pyrimidin-2-yl, or pyridine -2-yl, and in these rings, at least one hydrogen is fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or at least one hydrogen is replaced by fluorine or chlorine. Further, it may be substituted with alkyl having 1 to 12 carbons. Preferred ring T or ring V is phenyl. Ring U is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene -1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2 , 7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl, or pyridine-2,5-diyl, At least one hydrogen is fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or at least one hydrogen is fluorine or chlorine. From the obtained 1 carbon atoms may be replaced by alkyl of 12. Preferred ring U is 1,4-phenylene or 2-fluoro-1,4-phenylene.

Z ¹² and Z ¹³ are each independently a single bond or alkylene having 1 to 10 carbon atoms, in which at least one —CH ₂ — is —O—, —CO—, —COO—, or — It may be replaced by OCO-, and at least one _-CH 2 CH ₂ - _{is, -CH = CH -, - C} (CH 3) = CH -, - CH = C (CH 3) -, or -C (CH ₃ ) ═C (CH ₃ ) — may be replaced, and in these groups at least one hydrogen may be replaced with fluorine or chlorine. Preferred Z ¹² or Z ¹³ is a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—. Further preferred Z ¹² or Z ¹³ is a single bond.

  t is 0, 1, or 2. Preferred t is 0 or 1. u, v, and w are independently 0, 1, 2, 3, or 4, and the sum of u, v, and w is 1 or greater. Preferred u, v, or w is 1 or 2.

  Fifth, preferred component compounds are shown. Desirable compound (1) is the compound (1-1) to the compound (1-21) according to item 2. In these compounds, at least one of the first components is compound (1-1), compound (1-3), compound (1-4), compound (1-6), compound (1-8), or compound (1-10) is preferred. At least two of the first components are compound (1-1) and compound (1-6), compound (1-1) and compound (1-10), compound (1-3) and compound (1-6), The compound (1-3) and the compound (1-10), the compound (1-4) and the compound (1-6), or a combination of the compound (1-4) and the compound (1-8) is preferable.

  Desirable compound (2) is the compound (2-1) to the compound (2-13) according to item 5. In these compounds, at least one of the second components is compound (2-1), compound (2-3), compound (2-5), compound (2-6), compound (2-8), or compound (2-9) is preferred. At least two of the second components are the compound (2-1) and the compound (2-3), the compound (2-1) and the compound (2-5), or the compound (2-1) and the compound (2-6). A combination is preferred.

  Desirable compound (3) is the compound (3-1) to the compound (3-21) according to item 8. In these compounds, at least one of the third components is a compound (3-1), a compound (3-3), a compound (3-4), a compound (3-6), a compound (3-8), or a compound It is preferable that it is (3-10). At least two of the third components are compound (3-1) and compound (3-6), compound (3-1) and compound (3-10), compound (3-3) and compound (3-6), The compound (3-3) and the compound (3-10), the compound (3-4) and the compound (3-6), or a combination of the compound (3-4) and the compound (3-8) is preferable.

  Desirable compound (4) is the compound (4-1-1) to the compound (4-1-4) according to Item 15. In these compounds, it is preferable that at least one of the first additives is the compound (4-1-1). It is preferable that at least two of the first additives are a combination of the compound (4-1-1) and the compound (4-1-2).

  Desirable compounds (5) are the compounds (5-1-1) to (5-1-29) according to item 16. In general, the compound (4) is preferable to the compound (5).

  Particularly preferred compound (4-1) is selected from the following compounds.

式（４−１−１−１）から式（４−１−４−４）において、Ｒ^１５は炭素数１から８のアルキルまたはフッ素である。

In the formula (4-1-1-1) to the formula (4-1-4-4), R ¹⁵ is alkyl having 1 to 8 carbons or fluorine.

  Particularly preferred compound (5-1) is selected from the following compounds (5-1-1-1) to compounds (5-1-29-1).

  Desirable compound (6) is the compound (6-1) to the compound (6-28) according to item 20. In these compounds, at least one of the second additives is compound (6-1), compound (6-2), compound (6-24), compound (6-25), compound (6-26), or It is preferable that it is a compound (6-27). At least two of the second additives are compound (6-1) and compound (6-2), compound (6-1) and compound (6-18), compound (6-2) and compound (6-24). , Compound (6-2) and Compound (6-25), Compound (6-2) and Compound (6-26), Compound (6-25) and Compound (6-26), or Compound (6-18) And a combination of the compound (6-24).

  Sixth, additives that may be added to the composition will be described. Such additives are optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, polar compounds and the like. An optically active compound is added to the composition for the purpose of inducing a helical structure of liquid crystal molecules to give a twist angle. Examples of such a compound are the compound (7-1) to the compound (7-5). A desirable ratio of the optically active compound is approximately 5% by weight or less. A more desirable ratio is in the range of approximately 0.01% by weight to approximately 2% by weight.

In order to prevent a decrease in specific resistance due to heating in the atmosphere or to maintain a large voltage holding ratio not only at room temperature but also at a temperature close to the upper limit temperature after using the device for a long time, an antioxidant is composed. Added to the product. A preferred example of the antioxidant is a compound (8) wherein n is an integer of 1 to 9.

  In the compound (8), preferred n is 1, 3, 5, 7, or 9. Further preferred n is 7. Since the compound (8) in which n is 7 has low volatility, it is effective for maintaining a large voltage holding ratio not only at room temperature but also at a temperature close to the upper limit temperature after the device has been used for a long time. A desirable ratio of the antioxidant is approximately 50 ppm or more for achieving its effect, and is approximately 600 ppm or less for avoiding a decrease in the maximum temperature or avoiding an increase in the minimum temperature. A more desirable ratio is in the range of approximately 100 ppm to approximately 300 ppm.

  Preferred examples of the ultraviolet absorber include benzophenone derivatives, benzoate derivatives, triazole derivatives and the like. Also preferred are light stabilizers such as sterically hindered amines. A desirable ratio of these absorbers and stabilizers is approximately 50 ppm or more for achieving the effect thereof, and approximately 10,000 ppm or less for avoiding a decrease in the maximum temperature or avoiding an increase in the minimum temperature. A more desirable ratio is in the range of approximately 100 ppm to approximately 10,000 ppm.

  A dichroic dye such as an azo dye or an anthraquinone dye is added to the composition in order to adapt to a GH (guest host) mode device. A preferred ratio of the dye is in the range of approximately 0.01% by weight to approximately 10% by weight. In order to prevent foaming, an antifoaming agent such as dimethyl silicone oil or methylphenyl silicone oil is added to the composition. A desirable ratio of the antifoaming agent is approximately 1 ppm or more for obtaining the effect thereof, and approximately 1000 ppm or less for preventing a display defect. A more desirable ratio is in the range of approximately 1 ppm to approximately 500 ppm.

  A polymerizable compound is used to adapt to a polymer support alignment (PSA) type device. Compound (6) is suitable for this purpose. Other polymerizable compounds different from the compound (6) may be added to the composition together with the compound (6). Preferable examples of other polymerizable compounds are compounds such as acrylate, methacrylate, vinyl compound, vinyloxy compound, propenyl ether, epoxy compound (oxirane, oxetane), vinyl ketone and the like. Further preferred examples are acrylate or methacrylate. A desirable ratio of compound (6) is approximately 10% by weight or more based on the total weight of the polymerizable compound. A more desirable ratio is about 50% by weight or more. A particularly desirable ratio is approximately 80% by weight or more. A particularly desirable ratio is also 100% by weight. The reactivity of the polymerizable compound and the pretilt angle of the liquid crystal molecules can be adjusted by changing the type of the compound (6) or combining the compound (6) with another polymerizable compound in an appropriate ratio. By optimizing the pretilt angle, a short response time of the element can be achieved. Since the alignment of the liquid crystal molecules is stabilized, a large contrast ratio and a long lifetime can be achieved.

  The polymerizable compound is polymerized by ultraviolet irradiation. The polymerization may be performed in the presence of a suitable initiator such as a photopolymerization initiator. Appropriate conditions for polymerization, the appropriate type of initiator, and the appropriate amount are known to those skilled in the art and are described in the literature. For example, Irgacure 651 (registered trademark; BASF), Irgacure 184 (registered trademark; BASF), or Darocur 1173 (registered trademark; BASF), which are photoinitiators, are suitable for radical polymerization. A desirable ratio of the photopolymerization initiator is in the range of approximately 0.1% by weight to approximately 5% by weight based on the total weight of the polymerizable compound. A more desirable ratio is in the range of approximately 1% by weight to approximately 3% by weight.

  When storing the polymerizable compound, a polymerization inhibitor may be added in order to prevent polymerization. The polymerizable compound is usually added to the composition without removing the polymerization inhibitor. Examples of the polymerization inhibitor include hydroquinone, hydroquinone derivatives such as methylhydroquinone, 4-t-butylcatechol, 4-methoxyphenol, phenothiazine and the like.

The polar compound is an organic compound having polarity. Here, a compound having an ionic bond is not included. Atoms such as oxygen, sulfur, and nitrogen are more electronegative and tend to have partial negative charges. Carbon and hydrogen tend to be neutral or have a partial positive charge. Polarity arises from the fact that partial charges are not evenly distributed among different types of atoms in a compound. For example, the polar compound has at least one of partial structures such as —OH, —COOH, —SH, —NH ₂ ,> NH, and> N—.

  Seventh, a method for synthesizing the component compounds will be described. These compounds can be synthesized by known methods. The synthesis method is illustrated. Compound (1-6) is synthesized by the method described in Japanese Patent Application Laid-Open No. 2000-053602. Compound (2-1) is synthesized by the method described in JP-A-59-176221. Compound (3-1) is synthesized by the method described in JP-T-2-503441. Compound (4-1) is synthesized by the method described in International Publication No. 2012-038026. A part of the compound (5) is commercially available. Compound (6-18) is synthesized by the method described in JP-A-7-101900. A part of the compound (8) is commercially available. A compound of formula (8) where n is 1 is available from Sigma-Aldrich Corporation. Compound (8) or the like in which n is 7 is synthesized by the method described in US Pat. No. 3,660,505.

  Compounds that have not been described as synthetic methods include Organic Synthesis (John Wiley & Sons, Inc.), Organic Reactions (John Wiley & Sons, Inc.), Comprehensive Organic Synthesis ( Comprehensive Organic Synthesis, Pergamon Press), New Experimental Chemistry Course (Maruzen), etc. The composition is prepared from the compound thus obtained by known methods. For example, the component compounds are mixed and dissolved in each other by heating.

  Finally, the use of the composition will be described. Most compositions have a minimum temperature of about −10 ° C. or lower, a maximum temperature of about 70 ° C. or higher, and an optical anisotropy in the range of about 0.07 to about 0.20. A composition having an optical anisotropy in the range of about 0.08 to about 0.25 may be prepared by controlling the ratio of the component compounds or by mixing other liquid crystal compounds. Furthermore, a composition having optical anisotropy in the range of about 0.10 to about 0.30 may be prepared by trial and error. A device containing this composition has a large voltage holding ratio. This composition is suitable for an AM device. This composition is particularly suitable for a transmissive AM device. This composition can be used as a composition having a nematic phase, or can be used as an optically active composition by adding an optically active compound.

  This composition can be used for an AM device. Further, it can be used for PM elements. This composition can be used for an AM device and a PM device having modes such as PC, TN, STN, ECB, OCB, IPS, FFS, VA, and FPA. Use for an AM device having a mode such as TN, OCB, IPS, or FFS is particularly preferable. In an AM device having an IPS mode or an FFS mode, when no voltage is applied, the alignment of liquid crystal molecules may be parallel to or perpendicular to the glass substrate. These elements may be reflective, transmissive, or transflective. Use in a transmissive element is preferred. It can also be used for an amorphous silicon-TFT device or a polycrystalline silicon-TFT device. It can also be used for an NCAP (nematic curvilinear aligned phase) type device produced by microencapsulating this composition, or a PD (polymer dispersed) type device in which a three-dimensional network polymer is formed in the composition.

  An example of a method for producing a conventional polymer-supported orientation type device is as follows. An element having two substrates called an array substrate and a color filter substrate is assembled. This substrate has an alignment film. At least one of the substrates has an electrode layer. A liquid crystal compound is prepared by mixing a liquid crystal compound. A polymerizable compound is added to the composition. You may add an additive further as needed. This composition is injected into the device. The device is irradiated with light with a voltage applied. Ultraviolet light is preferred. The polymerizable compound is polymerized by light irradiation. By this polymerization, a composition containing a polymer is generated. The polymer-supported orientation type element is manufactured by such a procedure.

  In this procedure, when a voltage is applied, liquid crystal molecules are aligned by the action of an electric field. According to this orientation, the molecules of the polymerizable compound are also oriented. In this state, the polymerizable compound is polymerized by ultraviolet rays, so that a polymer maintaining this orientation is formed. The effect of this polymer shortens the response time of the device. Since image sticking is a malfunction of the liquid crystal molecules, the effect of this polymer also improves the image sticking. It is also possible to polymerize a polymerizable compound in the composition in advance and place the composition between the substrates of the liquid crystal display element.

  An example of a method for manufacturing an element having no alignment film is as follows. A mixture of a liquid crystal compound, a polymerizable compound, and a polar compound is injected into an element having no alignment film. The device is irradiated with light with a voltage applied. The polymerizable compound is polymerized by light irradiation. By this polymerization, a layer of a composition containing a polymer and a polar compound is formed on the substrate.

  In this procedure, polar compounds are arranged on the substrate because polar groups interact with the substrate surface. This polar compound aligns the liquid crystal molecules. When a voltage is applied, the alignment of liquid crystal molecules is further promoted, and the polymerizable compound is also aligned according to this alignment. In this state, the polymerizable compound is polymerized by ultraviolet rays, so that a polymer maintaining this orientation is formed. The effect of this polymer additionally stabilizes the orientation of the liquid crystal molecules and shortens the response time of the device. Since image sticking is a malfunction of the liquid crystal molecules, the effect of this polymer also improves the image sticking.

  The invention is explained in more detail by means of examples. The invention is not limited by these examples. The present invention includes a mixture of the composition (M1) and the composition (M2). The invention also includes a mixture of at least two of the example compositions. The synthesized compound was identified by a method such as NMR analysis. The characteristics of the compound, composition and device were measured by the following methods.

NMR analysis: For measurement, DRX-500 manufactured by Bruker BioSpin Corporation was used. ^In the measurement of ¹ H-NMR, the sample was dissolved in a deuterated solvent such as CDCl _3, and the measurement was performed at room temperature under conditions of 500 MHz and 16 integrations. Tetramethylsilane was used as an internal standard. ^{For 19} F-NMR measurement, CFCl ₃ was used as an internal standard, and the number of integrations was 24. In the description of the nuclear magnetic resonance spectrum, s is a singlet, d is a doublet, t is a triplet, q is a quartet, quint is a quintet, sex is a sextet, m is a multiplet, and br is broad.

  Gas chromatographic analysis: A GC-14B gas chromatograph manufactured by Shimadzu Corporation was used for measurement. The carrier gas is helium (2 mL / min). The sample vaporization chamber was set at 280 ° C, and the detector (FID) was set at 300 ° C. For separation of the component compounds, capillary column DB-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 μm; stationary liquid phase is dimethylpolysiloxane; nonpolar) manufactured by Agilent Technologies Inc. was used. The column was held at 200 ° C. for 2 minutes and then heated to 280 ° C. at a rate of 5 ° C./min. A sample was prepared in an acetone solution (0.1% by weight), and 1 μL thereof was injected into the sample vaporization chamber. The recorder is a C-R5A type Chromatopac manufactured by Shimadzu Corporation or an equivalent thereof. The obtained gas chromatogram showed the peak retention time and peak area corresponding to the component compounds.

  As a solvent for diluting the sample, chloroform, hexane or the like may be used. In order to separate the component compounds, the following capillary column may be used. HP-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 μm) manufactured by Agilent Technologies Inc., Rtx-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 μm) manufactured by Restek Corporation, BP-1 made by SGE International Pty. Ltd (length 30 m, inner diameter 0.32 mm, film thickness 0.25 μm). In order to prevent compound peaks from overlapping, a capillary column CBP1-M50-025 (length 50 m, inner diameter 0.25 mm, film thickness 0.25 μm) manufactured by Shimadzu Corporation may be used.

  The ratio of the liquid crystal compound contained in the composition may be calculated by the following method. The mixture of liquid crystal compounds is analyzed by gas chromatography (FID). The area ratio of peaks in the gas chromatogram corresponds to the ratio of liquid crystal compounds. When the capillary column described above is used, the correction coefficient of each liquid crystal compound may be regarded as 1. Therefore, the ratio (% by weight) of the liquid crystal compound can be calculated from the peak area ratio.

  Measurement sample: When measuring the characteristics of the composition and the device, the composition was used as it was as a sample. When measuring the characteristics of the compound, a sample for measurement was prepared by mixing this compound (15% by weight) with mother liquid crystals (85% by weight). The characteristic value of the compound was calculated from the value obtained by the measurement by extrapolation. (Extrapolated value) = {(Measured value of sample) −0.85 × (Measured value of mother liquid crystal)} / 0.15. When the smectic phase (or crystal) is precipitated at 25 ° C. at this ratio, the ratio of the compound and the mother liquid crystal is 10% by weight: 90% by weight, 5% by weight: 95% by weight, 1% by weight: 99% by weight in this order changed. By this extrapolation method, the maximum temperature, optical anisotropy, viscosity, and dielectric anisotropy values for the compound were determined.

The following mother liquid crystals were used. The ratio of the component compounds is shown by weight%.

  Measuring method: The characteristics were measured by the following method. Many of these are the methods described in the JEITA standard (JEITA ED-2521B) established by the Japan Electronics and Information Technology Industries Association (JEITA), or a modified method thereof. Met. No thin film transistor (TFT) was attached to the TN device used for the measurement.

(1) Maximum temperature of nematic phase (NI; ° C.): A sample was placed on a hot plate of a melting point measuring apparatus equipped with a polarizing microscope and heated at a rate of 1 ° C./min. The temperature was measured when a part of the sample changed from a nematic phase to an isotropic liquid. The upper limit temperature of the nematic phase may be abbreviated as “upper limit temperature”.

(2) Minimum Temperature of a Nematic Phase _{(T C;} ° C.): A sample having a nematic phase was put in a glass bottle, 0 ℃, -10 ℃, -20 ℃, -30 ℃, and -40 ℃ for 10 days in a freezer After storage, the liquid crystal phase was observed. For example, when the sample remained in the nematic phase at −20 ° C. and changed to a crystalline or smectic phase at −30 ° C., the _TC was described as <−20 ° C. The lower limit temperature of the nematic phase may be abbreviated as “lower limit temperature”.

(3) Viscosity (bulk viscosity; η; measured at 20 ° C .; mPa · s): An E-type viscometer manufactured by Tokyo Keiki Co., Ltd. was used for the measurement.

(4) Viscosity (rotational viscosity; γ1; measured at 25 ° C .; mPa · s): The measurement was performed according to the method described in M. Imai et al., Molecular Crystals and Liquid Crystals, Vol. 259, 37 (1995). I followed. A sample was injected into a VA device having a distance (cell gap) between two glass substrates of 20 μm. This element was applied stepwise in increments of 1 volt within a range of 39 to 50 volts. After no application for 0.2 seconds, the application was repeated under the condition of only one rectangular wave (rectangular pulse; 0.2 seconds) and no application (2 seconds). The peak current and peak time of the transient current generated by this application were measured. These measurements and M.I. The value of rotational viscosity was obtained from the paper by Imai et al., Calculation formula (8) on page 40. The dielectric anisotropy necessary for this calculation was measured by the method described in measurement (6).

(5) Optical anisotropy (refractive index anisotropy; Δn; measured at 25 ° C.): The measurement was performed with an Abbe refractometer using a light having a wavelength of 589 nm and a polarizing plate attached to an eyepiece. After rubbing the surface of the main prism in one direction, the sample was dropped on the main prism. The refractive index n‖ was measured when the polarization direction was parallel to the rubbing direction. The refractive index n⊥ was measured when the polarization direction was perpendicular to the rubbing direction. The value of optical anisotropy was calculated from the equation: Δn = n∥−n⊥.

(6) Dielectric Anisotropy (Δε; measured at 25 ° C.): The value of dielectric anisotropy was calculated from the equation: Δε = ε∥−ε⊥. The dielectric constants (ε‖ and ε⊥) were measured as follows.
1) Measurement of dielectric constant (ε‖): A solution of octadecyltriethoxysilane (0.16 mL) in ethanol (20 mL) was applied to a well-cleaned glass substrate. The glass substrate was rotated with a spinner and then heated at 150 ° C. for 1 hour. A sample was put in a VA element in which the distance between two glass substrates (cell gap) was 4 μm, and the element was sealed with an adhesive that was cured with ultraviolet rays. Sine waves (0.5 V, 1 kHz) were applied to the device, and after 2 seconds, the dielectric constant (ε‖) in the major axis direction of the liquid crystal molecules was measured.
2) Measurement of dielectric constant (ε⊥): A polyimide solution was applied to a well-cleaned glass substrate. After baking this glass substrate, the obtained alignment film was rubbed. A sample was injected into a TN device in which the distance between two glass substrates (cell gap) was 9 μm and the twist angle was 80 degrees. Sine waves (0.5 V, 1 kHz) were applied to the device, and after 2 seconds, the dielectric constant (ε⊥) in the minor axis direction of the liquid crystal molecules was measured.

(7) Threshold voltage (Vth; measured at 25 ° C .; V): An LCD5100 luminance meter manufactured by Otsuka Electronics Co., Ltd. was used for the measurement. The light source was a halogen lamp. A sample is placed in a normally black mode VA element in which the distance between two glass substrates (cell gap) is 4 μm and the rubbing direction is anti-parallel, and an adhesive that cures the element with ultraviolet rays is used. And sealed. The voltage (60 Hz, rectangular wave) applied to this element was increased stepwise from 0V to 20V by 0.02V. At this time, the device was irradiated with light from the vertical direction, and the amount of light transmitted through the device was measured. A voltage-transmittance curve was created in which the transmittance was 100% when the light amount reached the maximum and the transmittance was 0% when the light amount was the minimum. The threshold voltage was expressed as a voltage when the transmittance reached 10%.

(8) Voltage holding ratio (VHR-1; measured at 25 ° C .;%): The TN device used for the measurement had a polyimide alignment film, and the distance between two glass substrates (cell gap) was 5 μm. . This element was sealed with an adhesive that was cured by ultraviolet rays after the sample was injected. The TN device was charged by applying a pulse voltage (60 microseconds at 5 V). The decaying voltage was measured for 16.7 milliseconds with a high-speed voltmeter, and the area A between the voltage curve and the horizontal axis in a unit cycle was determined. Area B was the area when it was not attenuated. The voltage holding ratio was expressed as a percentage of area A with respect to area B.

(9) Voltage holding ratio (VHR-2; measured at 80 ° C .;%): The voltage holding ratio was measured in the same procedure as above except that it was measured at 80 ° C. instead of 25 ° C. The obtained value was represented by VHR-2.

(10) Voltage holding ratio (VHR-3; measured at 25 ° C .;%): After irradiation with ultraviolet rays, the voltage holding ratio was measured to evaluate the stability against ultraviolet rays. The TN device used for the measurement had a polyimide alignment film, and the cell gap was 5 μm. A sample was injected into this element and irradiated with light for 20 minutes. The light source was an ultra-high pressure mercury lamp USH-500D (made by USHIO Inc.), and the distance between the element and the light source was 20 cm. In the measurement of VHR-3, a decaying voltage was measured for 16.7 milliseconds. A composition having a large VHR-3 has a large stability to ultraviolet light. VHR-3 is preferably 90% or more, and more preferably 95% or more.

(11) Voltage holding ratio (VHR-4; measured at 25 ° C .;%): The TN device into which the sample was injected was heated in a thermostatic bath at 80 ° C. for 500 hours, and then the voltage holding ratio was measured and stability against heat. Evaluated. In the measurement of VHR-4, a decaying voltage was measured for 16.7 milliseconds. A composition having a large VHR-4 has a large stability to heat.

(12) Response time (τ; measured at 25 ° C .; ms): An LCD5100 luminance meter manufactured by Otsuka Electronics Co., Ltd. was used for measurement. The light source was a halogen lamp. The low-pass filter was set to 5 kHz. A sample was put in a VA device in which the distance between two glass substrates (cell gap) was 3.5 μm and no alignment film was provided. This element was sealed with an adhesive that was cured by ultraviolet rays. The device was irradiated with ultraviolet light of 78 mW / cm ² (405 nm) for 449 seconds (35 J) while applying a voltage of 30V. For irradiation with ultraviolet rays, an ultraviolet curing multimetal lamp M04-L41 manufactured by Eye Graphics Co., Ltd. was used. A rectangular wave (120 Hz) was applied to this element. At this time, the device was irradiated with light from the vertical direction, and the amount of light transmitted through the device was measured. It was considered that the transmittance was 100% when the light amount was the maximum, and the transmittance was 0% when the light amount was the minimum. The maximum voltage of the rectangular wave was set so that the transmittance was 90%. The minimum voltage of the rectangular wave was set to 2.5 V at which the transmittance was 0%. The response time was expressed as the time required to change the transmittance from 10% to 90% (rise time; millisecond).

(13) Elastic constant (K11: spread elastic constant, K33: bend elastic constant; measured at 25 ° C .; pN): For measurement, an EC-1 type elastic constant measuring instrument manufactured by Toyo Corporation was used. Using. A sample was injected into a vertical alignment element in which the distance between two glass substrates (cell gap) was 20 μm. A 20 to 0 volt charge was applied to the device, and the capacitance and applied voltage were measured. Fitting the measured values of capacitance (C) and applied voltage (V) using “Liquid Crystal Device Handbook” (Nikkan Kogyo Shimbun), formulas (2.98) and (2.101) on page 75 The value of the elastic constant was obtained from the formula (2.100).

(14) Specific resistance (ρ; measured at 25 ° C .; Ωcm): 1.0 mL of a sample was placed in a container equipped with electrodes. A DC voltage (10 V) was applied to the container, and the DC current after 10 seconds was measured. The specific resistance was calculated from the following equation. (Resistivity) = {(Voltage) × (Capacity of container)} / {(DC current) × (Dielectric constant of vacuum)}.

(15) Pretilt angle (degree): A spectroscopic ellipsometer M-2000U (manufactured by JA Woollam Co., Inc.) was used for measurement of the pretilt angle.

(16) Alignment stability (liquid crystal alignment axis stability): Changes in the liquid crystal alignment axis on the electrode side of the liquid crystal display element were evaluated. Measure the liquid crystal alignment angle φ (before) on the electrode before applying stress, and then apply a rectangular wave of 4.5 V and 60 Hz to the device for 20 minutes, then short for 1 second, and then reapply the electrode after 1 second and 5 minutes. The liquid crystal alignment angle φ (after) on the side was measured. From these values, the change Δφ (deg.) In the liquid crystal alignment angle after 1 second and after 5 minutes was calculated using the following equation.
Δφ (deg.) = Φ (after) −φ (before) (Formula 2)
These measurements were made with reference to J. Hilfiker, B. Johs, C. Herzinger, JF Elman, E. Montbach, D. Bryant, and PJ Bos, Thin Solid Films, 455-456, (2004) 596-600. . It can be said that the smaller the Δφ, the smaller the change rate of the liquid crystal alignment axis and the better the stability of the liquid crystal alignment axis.

  Examples of the compositions are shown below. The component compounds were represented by symbols based on the definitions in Table 3 below. In Table 3, the configuration regarding 1,4-cyclohexylene is trans. The number in parentheses after the symbol represents the chemical formula to which the compound belongs. The symbol (−) means other liquid crystal compounds. The ratio (percentage) of the liquid crystal compound is a weight percentage (% by weight) based on the weight of the liquid crystal composition containing no additive. Finally, the characteristic values of the composition are summarized.

Example 1 of device A composition containing a polar compound was injected into an element having no raw material alignment film. After irradiating with ultraviolet rays, the vertical alignment of liquid crystal molecules in this device was examined. First, the raw materials will be explained. The raw materials are compositions (M1) to (M16), polar compounds (PC-1) to (PC-33), and polymerizable compounds (RM-1) to (RM-11), which are listed in this order.

[Composition (M1)]
V-HB (2F, 3F) -O2 (1-1) 10%
V2-HB (2F, 3F) -O2 (1-1) 7%
V-BB (2F, 3F) -O2 (1-4) 7%
V2-BB (2F, 3F) -O2 (1-4) 7%
V2-B (2F, 3F) B (2F, 3F) -O2
(1-5) 3%
V-HHB (2F, 3F) -O2 (1-6) 5%
V2-HHB (2F, 3F) -O2 (1-6) 10%
V2-HBB (2F, 3F) -O2 (1-10) 8%
V-HBB (2F, 3F) -O2 (1-10) 10%
2-HH-3 (2-1) 14%
3-HB-O1 (2-2) 5%
3-HHB-1 (2-5) 3%
3-HHB-O1 (2-5) 3%
3-HHB-3 (2-5) 4%
2-BB (F) B-3 (2-7) 4%
NI = 78.4 ° C .; Tc <−20 ° C .; Δn = 0.124; Δε = −3.8; Vth = 2.20 V; η = 21.0 mPa · s.

[Composition (M2)]
V2-H2B (2F, 3F) -O2 (1-2) 8%
V2-H1OB (2F, 3F) -O4 (1-3) 4%
V-HH2B (2F, 3F) -O2 (1-7) 6%
V2-HBB (2F, 3F) -O2 (1-10) 5%
V-HBB (2F, 3F) -O2 (1-10) 5%
V-HBB (2F, 3F) -O4 (1-10) 6%
2-HH-3 (2-1) 12%
1-BB-5 (2-3) 12%
3-HHB-1 (2-5) 4%
3-HHB-O1 (2-5) 3%
3-HBB-2 (2-6) 3%
3-BB (2F, 3F) -O2 (3-4) 7%
2-HHB (2F, 3F) -O2 (3-6) 7%
3-HHB (2F, 3F) -O2 (3-6) 7%
3-HH2B (2F, 3F) -O2 (3-7) 7%
5-HH2B (2F, 3F) -O2 (3-7) 4%
NI = 89.9 ° C .; Tc <−20 ° C .; Δn = 0.122; Δε = −4.2; Vth = 2.16 V; η = 23.4 mPa · s.

[Composition (M3)]
V-HB (2F, 3F) -O2 (1-1) 3%
V2-HB (2F, 3F) -O2 (1-1) 5%
V2-BB (2F, 3F) -O2 (1-4) 3%
1V2-BB (2F, 3F) -O2 (1-4) 3%
V-HHB (2F, 3F) -O2 (1-6) 6%
V-HHB (2F, 3F) -O4 (1-6) 5%
V2-HHB (2F, 3F) -O2 (1-6) 4%
V2-BB (2F, 3F) B-1 (1-9) 4%
V2-HBB (2F, 3F) -O2 (1-10) 5%
V-HBB (2F, 3F) -O2 (1-10) 4%
V-HBB (2F, 3F) -O4 (1-10) 5%
V-HHB (2F, 3Cl) -O2 (1-12) 3%
3-HH-V (2-1) 27%
3-HH-V1 (2-1) 6%
V-HHB-1 (2-5) 3%
3-HB (2F, 3F) -O2 (3-1) 3%
5-H2B (2F, 3F) -O2 (3-2) 5%
3-HHB (2F, 3F) -O2 (3-6) 6%
NI = 77.1 ° C .; Tc <−20 ° C .; Δn = 0.101; Δε = −3.0; Vth = 2.04 V; η = 13.9 mPa · s.

[Composition (M4)]
V-HB (2F, 3F) -O2 (1-1) 10%
V2-HB (2F, 3F) -O2 (1-1) 10%
V2-BB (2F, 3F) -O2 (1-4) 8%
V2-HHB (2F, 3F) -O2 (1-6) 5%
V-HBB (2F, 3F) -O2 (1-10) 6%
V-HBB (2F, 3F) -O4 (1-10) 8%
V-HHB (2F, 3Cl) -O2 (1-12) 7%
3-HH-4 (2-1) 14%
V-HHB-1 (2-5) 10%
3-HBB-2 (2-6) 7%
2-H1OB (2F, 3F) -O2 (3-3) 3%
3-H1OB (2F, 3F) -O2 (3-3) 3%
2O-BB (2F, 3F) -O2 (3-4) 3%
2-HBB (2F, 3F) -O2 (3-10) 3%
3-HBB (2F, 3F) -O2 (3-10) 3%
NI = 75.9 ° C .; Tc <−20 ° C .; Δn = 0.114; Δε = −3.9; Vth = 2.20 V; η = 24.7 mPa · s.

[Composition (M5)]
V-HB (2F, 3F) -O2 (1-1) 5%
V-HB (2F, 3F) -O4 (1-1) 6%
V2-H2B (2F, 3F) -O2 (1-2) 7%
V2-BB (2F, 3F) -O2 (1-4) 10%
V-HHB (2F, 3F) -O1 (1-6) 6%
V-HHB (2F, 3F) -O2 (1-6) 7%
V2-HHB (2F, 3F) -O2 (1-6) 3%
1V-HHB (2F, 3F) -O2 (1-6) 6%
V-HH2B (2F, 3F) -O2 (1-7) 5%
V-HH2B (2F, 3F) -O4 (1-7) 4%
V-HBB (2F, 3F) -O2 (1-10) 6%
V-HBB (2F, 3F) -O4 (1-10) 6%
3-HH-O1 (2-1) 5%
1-BB-5 (2-3) 4%
V-HHB-1 (2-5) 4%
5-HB (F) BH-3 (2-12) 5%
5-HB (2F, 3F) -O2 (3-1) 3%
3-B (2F, 3F) B (2F, 3F) -O2 (3-5) 3%
5-HHB (2F, 3F) -O2 (3-6) 5%
NI = 75.9 ° C .; Tc <−20 ° C .; Δn = 0.118; Δε = −4.5; Vth = 1.68 V; η = 28.3 mPa · s.

[Composition (M6)]
V-HB (2F, 3F) -O4 (1-1) 15%
V2-HHB (2F, 3F) -O2 (1-6) 5%
V-HBB (2F, 3F) -O4 (1-10) 8%
V-chB (2F, 3F) -O2 (1-18) 5%
V-HchB (2F, 3F) -O2 (1-19) 7%
5-HH-V (2-1) 18%
7-HB-1 (2-2) 5%
V-HHB-1 (2-5) 7%
V2-HHB-1 (2-5) 7%
3-HBB (F) B-3 (2-13) 8%
2-HHB (2F, 3F) -O2 (3-6) 5%
3-HHB (2F, 3F) -O2 (3-6) 5%
3-HH1OB (2F, 3F) -O2 (3-8) 5%
NI = 95.5 ° C .; Tc <−20 ° C .; Δn = 0.099; Δε = −3.2; Vth = 2.45 V; η = 21.7 mPa · s.

[Composition (M7)]
V2-H2B (2F, 3F) -O2 (1-2) 5%
V-H1OB (2F, 3F) -O2 (1-3) 4%
V-HHB (2F, 3F) -O2 (1-6) 4%
V2-HHB (2F, 3F) -O2 (1-6) 6%
3-HH-V (2-1) 11%
3-HH-VFF (2-1) 7%
3-HHEH-3 (2-4) 4%
3-HB (F) HH-2 (2-10) 4%
3-HHEBH-3 (2-11) 4%
3-HB (2F, 3F) -O4 (3-1) 3%
3-H2B (2F, 3F) -O2 (3-2) 3%
2-HHB (2F, 3F) -1 (3-6) 3%
3-HHB (2F, 3F) -1 (3-6) 3%
2-HH1OB (2F, 3F) -O2 (3-8) 4%
2-BB (2F, 3F) B-3 (3-9) 3%
2-BB (2F, 3F) B-4 (3-9) 3%
2-HBB (2F, 3F) -O2 (3-10) 4%
3-HBB (2F, 3F) -O2 (3-10) 5%
4-HBB (2F, 3F) -O2 (3-10) 4%
5-HBB (2F, 3F) -O2 (3-10) 3%
3-HEB (2F, 3F) B (2F, 3F) -O2
(3-11) 3%
F3-HH-V (-) 10%
NI = 92.0 ° C .; Tc <−20 ° C .; Δn = 0.104; Δε = −2.7; Vth = 2.44 V; η = 21.7 mPa · s.

[Composition (M8)]
V-HB (2F, 3F) -O2 (1-1) 7%
V2-HB (2F, 3F) -O2 (1-1) 10%
V-BB (2F, 3F) -O2 (1-4) 7%
V2-BB (2F, 3F) -O2 (1-4) 7%
V2-B (2F, 3F) B (2F, 3F) -O2
(1-5) 3%
V-HHB (2F, 3F) -O1 (1-6) 5%
V-HHB (2F, 3F) -O2 (1-6) 10%
V2-HBB (2F, 3F) -O2 (1-10) 8%
V-HBB (2F, 3F) -O2 (1-10) 10%
V-HBB (2F, 3F) -O4 (1-10) 3%
3-HH-V (2-1) 11%
1-BB-5 (2-3) 5%
3-HHB (2F, 3F) -O2 (3-6) 4%
5-HHB (2F, 3F) -O2 (3-6) 4%
3-HHB (2F, 3Cl) -O2 (3-12) 3%
3-HBB (2F, 3Cl) -O2 (3-13) 3%
NI = 70.6 ° C .; Tc <−20 ° C .; Δn = 0.131; Δε = −4.7; Vth = 1.65 V; η = 27.7 mPa · s.

[Composition (M9)]
V-HB (2F, 3F) -O4 (1-1) 15%
V2-H1OB (2F, 3F) -O4 (1-3) 4%
V2-BB (2F, 3F) -O2 (1-4) 8%
1V2-BB (2F, 3F) -O2 (1-4) 5%
V-HHB (2F, 3F) -O1 (1-6) 3%
V-HHB (2F, 3F) -O2 (1-6) 7%
1V-HH1OB (2F, 3F) -O2 (1-8) 5%
V-HBB (2F, 3F) -O2 (1-10) 4%
V-HBB (2F, 3F) -O4 (1-10) 3%
3-HH-V (2-1) 14%
1-BB-3 (2-3) 3%
3-HHB-1 (2-5) 4%
3-HHB-O1 (2-5) 4%
V-HBB-2 (2-6) 4%
1-BB (F) B-2V (2-7) 6%
3-HH1OCro (7F, 8F) -5 (3-15) 3%
5-HDhB (2F, 3F) -O2 (3-16) 4%
5-HBBH-1O1 (-) 4%
NI = 88.2 ° C .; Tc <−20 ° C .; Δn = 0.122; Δε = −4.1; Vth = 2.26 V; η = 29.7 mPa · s.

[Composition (M10)]
V2-H2B (2F, 3F) -O2 (1-2) 8%
V2-H1OB (2F, 3F) -O4 (1-3) 5%
V2-BB (2F, 3F) -O2 (1-4) 10%
1V2-BB (2F, 3F) -O2 (1-4) 3%
V-HHB (2F, 3F) -O2 (1-6) 6%
V2-HHB (2F, 3F) -O2 (1-6) 5%
V-HBB (2F, 3F) -O2 (1-10) 4%
V-HBB (2F, 3F) -O4 (1-10) 7%
1V-HHB (2F, 3Cl) -O2 (1-12) 6%
3-HH-V (2-1) 11%
1-BB-3 (2-3) 6%
3-HHB-1 (2-5) 4%
3-HHB-O1 (2-5) 4%
3-HBB-2 (2-6) 4%
3-B (F) BB-2 (2-8) 4%
3-HBB (2F, 3F) -O2 (3-10) 3%
5-HBB (2F, 3F) -O2 (3-10) 4%
3-H1OCro (7F, 8F) -5 (3-14) 3%
3-HDhB (2F, 3F) -O2 (3-16) 3%
NI = 92.3 ° C .; Tc <−20 ° C .; Δn = 0.134; Δε = −4.5; Vth = 2.25 V; η = 28.6 mPa · s.

[Composition (M11)]
V2-H2B (2F, 3F) -O2 (1-2) 8%
V2-H1OB (2F, 3F) -O4 (1-3) 4%
V2-BB (2F, 3F) -O2 (1-4) 7%
V-HHB (2F, 3F) -O1 (1-6) 5%
V-HHB (2F, 3F) -O2 (1-6) 10%
V-HHB (2F, 3F) -O4 (1-6) 6%
V-HBB (2F, 3F) -O2 (1-10) 7%
V-HBB (2F, 3F) -O4 (1-10) 5%
V2-HHB (2F, 3Cl) -O2 (1-12) 5%
2-HH-3 (2-1) 12%
1-BB-3 (2-3) 6%
3-HHB-1 (2-5) 3%
3-HHB-O1 (2-5) 4%
3-HBB-2 (2-6) 6%
3-B (F) BB-2 (2-8) 3%
3-dhBB (2F, 3F) -O2 (3-17) 5%
3-chB (2F, 3F) -O2 (3-18) 4%
NI = 91.1 ° C .; Tc <−20 ° C .; Δn = 0.129; Δε = −4.4; Vth = 2.24; η = 26.9 mPa · s.

[Composition (M12)]
V-HB (2F, 3F) -O2 (1-1) 7%
V2-HB (2F, 3F) -O2 (1-1) 7%
V2-BB (2F, 3F) -O2 (1-4) 8%
V-HHB (2F, 3F) -O2 (1-6) 4%
V-HHB (2F, 3F) -O4 (1-6) 5%
1V-HH1OB (2F, 3F) -O2 (1-8) 5%
V2-BB (2F, 3F) B-1 (1-9) 4%
V-HBB (2F, 3F) -O2 (1-10) 3%
V-HBB (2F, 3F) -O4 (1-10) 8%
3-HH-V (2-1) 33%
V-HHB-1 (2-5) 3%
3-HHB (2F, 3F) -O2 (3-6) 7%
2-HchB (2F, 3F) -O2 (3-19) 6%
NI = 71.7 ° C .; Tc <−20 ° C .; Δn = 0.099; Δε = −3.1; Vth = 2.10 V; η = 13.5 mPa · s.

[Composition (M13)]
V-H1OB (2F, 3F) -O4 (1-3) 6%
V2-H1OB (2F, 3F) -O4 (1-3) 4%
V2-BB (2F, 3F) -O2 (1-4) 3%
V-HH1OB (2F, 3F) -O2 (1-8) 14%
V-HBB (2F, 3F) -O2 (1-10) 7%
V-HBB (2F, 3F) -O4 (1-10) 11%
2-HH-3 (2-1) 5%
3-HH-VFF (2-1) 30%
1-BB-3 (2-3) 5%
3-HHB-1 (2-5) 3%
3-HBB-2 (2-6) 3%
3-HBB (2F, 3F) -O2 (3-10) 6%
5-BB (2F) B (2F, 3F) -O2 (3-20) 3%
NI = 76.4 ° C .; Tc <−20 ° C .; Δn = 0.108; Δε = −3.1; Vth = 2.18 V; η = 18.0 mPa · s.

[Composition (M14)]
V-HB (2F, 3F) -O2 (1-1) 5%
V2-HB (2F, 3F) -O2 (1-1) 7%
V2-BB (2F, 3F) -O2 (1-4) 8%
V-HHB (2F, 3F) -O2 (1-6) 5%
V-HHB (2F, 3F) -O4 (1-6) 4%
1V-HH1OB (2F, 3F) -O2 (1-8) 5%
V2-BB (2F, 3F) B-1 (1-9) 4%
V-HBB (2F, 3F) -O2 (1-10) 3% V-HBB (2F, 3F) -O4 (1-10) 9%
3-HH-V (2-1) 27%
3-HH-V1 (2-1) 6%
V-HHB-1 (2-5) 5%
3-HBB (2F, 3F) -O2 (3-10) 5%
5-HBB (2F, 3Cl) -O2 (3-13) 4%
3-BB (F) B (2F, 3F) -O2 (3-21) 3%
NI = 76.3 ° C .; Tc <−20 ° C .; Δn = 0.112; Δε = −3.1; Vth = 2.13 V; η = 16.6 mPa · s.

[Composition (M15)]
V2-H2B (2F, 3F) -O2 (1-2) 5%
V2-BB (2F, 3F) -O2 (1-4) 8%
V-HHB (2F, 3F) -O2 (1-6) 10%
V2-BB (2F, 3F) B-1 (1-9) 5%
V2-HBB (2F, 3F) -O2 (1-10) 7%
V-dhBB (2F, 3F) -O2 (1-17) 4%
V2-dhBB (2F, 3F) -O2 (1-17) 3%
4-HH-V (2-1) 15%
3-HH-V1 (2-1) 6%
1-HH-2V1 (2-1) 6%
3-HH-2V1 (2-1) 4%
V2-BB-1 (2-3) 5%
1V2-BB-1 (2-3) 5%
3-HHB-1 (2-5) 6%
3-HB (F) BH-3 (2-12) 4%
2-BB (2F, 3F) -O2 (3-4) 3%
2-BB (2F, 3F) B-3 (3-9) 4%
NI = 73.0 ° C .; Tc <−20 ° C .; Δn = 0.124; Δε = −2.0; Vth = 2.80 V; η = 15.5 mPa · s.

[Composition (M16)]
V-HB (2F, 3F) -O4 (1-1) 6%
V2-H2B (2F, 3F) -O2 (1-2) 8%
V-H1OB (2F, 3F) -O2 (1-3) 5%
V2-BB (2F, 3F) -O2 (1-4) 10%
V-HHB (2F, 3F) -O2 (1-6) 6%
V2-HHB (2F, 3F) -O2 (1-6) 6%
1V-HHB (2F, 3F) -O2 (1-6) 6%
V2-HBB (2F, 3F) -O2 (1-10) 4%
V-HBB (2F, 3F) -O2 (1-10) 7%
V-HBB (2F, 3F) -O4 (1-10) 6%
V-HDhB (2F, 3F) -O2 (1-16) 3%
3-HH-V (2-1) 11%
1-BB-3 (2-3) 6%
3-HHB-1 (2-5) 4%
3-HHB-O1 (2-5) 4%
V2-BB2B-1 (2-9) 4%
1-BB2B-2V (2-9) 4%
NI = 83.4 ° C .; Tc <−20 ° C .; Δn = 0.131; Δε = −4.5; Vth = 2.20 V; η = 24.1 mPa · s.

The following polar compounds (PC-1) to (PC-33) were used as the first additive.

The following polymerizable compounds (RM-1) to (RM-11) were used as the second additive.

2. Example 1 of vertical alignment of liquid crystal molecules
The polar compound (PC-1) was added to the composition (M1) at a ratio of 5% by weight, and the polymerizable compound (RM-1) was added at a ratio of 0.5% by weight. This mixture was injected into a device having an alignment film having a gap (cell gap) of 4.0 μm between two glass substrates on a hot stage at 100 ° C. The polymerizable compound was polymerized by irradiating this element with ultraviolet rays (28J) using an ultra-high pressure mercury lamp USH-250-BY (manufactured by Ushio Inc.). This element was set in a polarizing microscope in which a polarizer and an analyzer were arranged so as to be orthogonal, and the element was irradiated with light from below, and the presence or absence of light leakage was observed. When the liquid crystal molecules were sufficiently aligned and light did not pass through the device, the vertical alignment was judged as “good”. When light passing through the element was observed, it was indicated as “defective”.

Examples 2 to 33 and Comparative Example 1
A device having no alignment film was manufactured using a mixture of the composition, the polar compound, and the polymerizable compound. The presence or absence of light leakage was observed in the same manner as in Example 1. The results are summarized in Table 4. In Comparative Example 1, no polymerizable compound was added for comparison.

  As can be seen from Table 4, in Examples 1 to 33, the type of the composition, polar compound or polymerizable compound was changed, but no light leakage was observed. This result shows that the vertical alignment is good even when the element does not have an alignment film, and the liquid crystal molecules are stably aligned. On the other hand, in Comparative Example 1, light leakage was observed. This result indicates that the vertical alignment was not good. Therefore, it can be seen that the polymer formed from the polymerizable compound plays an important role in the vertical alignment of the liquid crystal molecules. It is estimated that there is some contribution of polar compounds.

  The liquid crystal composition of the present invention can control the alignment of liquid crystal molecules in an element having no alignment film. A liquid crystal display element containing this composition has characteristics such as a short response time, a large voltage holding ratio, a low threshold voltage, a large contrast ratio, and a long lifetime, and thus can be used for a liquid crystal projector, a liquid crystal television, and the like. .

Claims (28)

A liquid crystal composition comprising a compound represented by formula (1) as a first component, a polar compound as a first additive, and a polymerizable compound as a second additive, and having negative dielectric anisotropy.

In formula (1), R ¹ is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; R ² is having 1 to 12 carbons Or an alkyl having 1 to 12 carbons, an alkenyl having 2 to 12 carbons, or an alkenyloxy having 2 to 12 carbons; ring A and ring C are independently 1,4-cyclohexylene, 1, 4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, at least one Naphthalene-2,6-diyl, chroman-2,6-diyl, in which hydrogen is replaced by fluorine or chlorine, or at least one Chroman-2,6-diyl substituted with fluorine or chlorine; ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2 , 3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl, or 7,8-difluorochroman-2,6-diyl; Z ¹ and Z ² is independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—; a is 1, 2, or 3 , B is 0 or 1, and the sum of a and b is 3 or less. The liquid crystal composition according to claim 1, comprising a compound selected from the group of compounds represented by formula (1-1) to formula (1-21) as a first component.

In Formula (1-1) to Formula (1-21), R ¹ is alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; R ² is alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyloxy having 2 to 12 carbons.   The liquid crystal composition according to claim 1 or 2, wherein the proportion of the first component is in the range of 5 wt% to 85 wt% based on the weight of the liquid crystal composition. The liquid crystal composition according to any one of claims 1 to 3, comprising a compound represented by formula (2) as a second component.

In Formula (2), R ³ and R ⁴ are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or at least one hydrogen is fluorine or chlorine. Substituted alkenyl having 2 to 12 carbons; ring D and ring E are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5 - be-difluoro-1,4-phenylene; ^{Z 3} is a single _{bond, -CH 2 CH 2 -, -} CH 2 O -, - OCH 2 -, - COO-, or a -OCO-; c is 1, 2, or 3. 5. The liquid crystal composition according to claim 1, comprising a compound selected from the group of compounds represented by formula (2-1) to formula (2-13) as the second component.

In formulas (2-1) to (2-13), R ³ and R ⁴ are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or C2-C12 alkenyl in which at least one hydrogen is replaced by fluorine or chlorine.   The liquid crystal composition according to claim 4 or 5, wherein the proportion of the second component is in the range of 5 wt% to 65 wt% based on the weight of the liquid crystal composition. The liquid crystal composition according to any one of claims 1 to 6, comprising a compound represented by formula (3) as a third component.

In formula (3), R ⁵ and R ⁶ are independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons; ring F and ring I are independently 1,4-cyclohexylene 1,4-cyclohexenylene, tetrahydropyran-2,5-diyl, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, naphthalene-2,6-diyl, Naphthalene-2,6-diyl, chroman-2,6-diyl, in which at least one hydrogen is replaced by fluorine or chlorine, or chroman-2,6-diyl, in which at least one hydrogen is replaced by fluorine or chlorine Ring G is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-; - methyl-1,4-phenylene, 3,4,5-trifluoro-2,6-diyl or 7,8-be difluorochroman-2,6-diyl; ^{Z 4} and ^{Z 5} are independently , Single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, or —OCO—; d is 1, 2, or 3; e is 0 or 1; the sum of d and e is 3 or less. The liquid crystal composition according to any one of claims 1 to 7, comprising a compound selected from the group of compounds represented by formulas (3-1) to (3-21) as a third component.

In formula (3-1) to formula (3-21), R ⁵ and R ⁶ are each independently alkyl having 1 to 12 carbons or alkoxy having 1 to 12 carbons.   The liquid crystal composition according to claim 7 or 8, wherein the ratio of the third component is in the range of 5 wt% to 60 wt% based on the weight of the liquid crystal composition.   10. The liquid crystal composition according to claim 1, comprising a polar compound having a polar group containing a hetero atom selected from nitrogen, oxygen, sulfur, and phosphorus as the first additive. The liquid crystal composition according to any one of claims 1 to 10, comprising a polar compound selected from the group of compounds represented by formula (4) and formula (5) as a first additive.

In Formula (4), MES is a mesogenic group having at least one ring; in Formula (5), R ⁷ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — May be replaced by —CH═CH—, —CF═CH—, —CH═CF—, —C≡C—, or cycloalkylene having 3 to 8 carbon atoms, and in these groups, at least one of Hydrogen may be replaced by fluorine or chlorine; in Formula (4) and Formula (5), R ⁸ is an oxygen atom of OH structure, a sulfur atom of SH structure, and primary, secondary, or primary A polar group having at least one nitrogen atom of a tertiary amine structure; x is 1 or 2. The liquid crystal composition according to any one of claims 1 to 11, comprising a polar compound represented by formula (4-1) as a first additive.

In Formula (4-1), R ⁹ is hydrogen, fluorine, chlorine, or alkyl having 1 to 25 carbons, and in this alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—. , -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O-, or cycloalkylene having 3 to 8 carbon atoms, and at least one first The tertiary carbon (> CH—) may be replaced with nitrogen (> N—), in which at least one hydrogen may be replaced with fluorine or chlorine, where R ⁰ is Hydrogen or alkyl having 1 to 12 carbons; R ¹⁰ is alkyl having 1 to 25 carbons, in which at least one —CH ₂ — is —NR ⁰ —, —O—, —S; -, -CO-, -COO , -OCO-, -OCOO-, or cycloalkylene having 3 to 8 carbon atoms, and at least one tertiary carbon (> CH-) may be replaced by nitrogen (> N-) In these groups, at least one hydrogen may be replaced by fluorine or chlorine, where R ⁰ is hydrogen or alkyl having 1 to 12 carbons, provided that R ¹⁰ is an oxygen of OH structure Having at least one atom, a sulfur atom of an SH structure, or a nitrogen atom of a primary, secondary, or tertiary amine structure; ring J and ring K are independently 6 to 25 carbon atoms An aromatic group having 5 to 25 carbon atoms, an alicyclic group having 3 to 25 carbon atoms, or a heteroalicyclic group having 4 to 25 carbon atoms, and these groups are condensed rings. In these groups, Both may be one hydrogen replaced with a group T, wherein the group T _{is, -OH, - (CH 2)} i -OH, fluorine, _{chlorine, -CN, -NO 2, -NCO,} -NCS, - _{^{OCN, -SCN, -C (= O}} ) N (R 0) 2, -C (= O) R 0, -N (R 0) 2, - (CH 2) i -N (R 0) 2, carbon Aryl having 6 to 20 carbon atoms, heteroaryl having 6 to 20 carbon atoms, alkyl having 1 to 25 carbon atoms, alkoxy having 1 to 25 carbon atoms, alkylcarbonyl having 2 to 25 carbon atoms, alkoxycarbonyl having 2 to 25 carbon atoms, an alkoxycarbonyloxy alkylcarbonyloxy or 2 to 25 carbon atoms, from 25 to 2 carbon atoms, and in the groups, at least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is Alkyl elementary or having 1 to 12 carbon atoms, and i is an 1, 2, 3 or ^{4,; Z} 6 is, -O -, - S -, - CO -, - CO-O -, - _{OCO -, - OCO-O -} , - OCH 2 -, - CH 2 O -, - SCH 2 -, - CH 2 S -, - CF 2 O -, - OCF 2 -, - CF 2 S-, _{-SCF 2 -, - (CH 2} ) i -, - CF 2 CH 2 -, - CH 2 CF 2 -, - (CF 2) i -, - CH = CH -, - CF = CF -, - C≡ C—, —CH═CH—COO—, —OCO—CH═CH—, —C (R ⁰ ) ₂ —, or a single bond, wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbons. And i is 1, 2, 3, or 4; f is 0, 1, 2, 3, 4, or 5. The liquid crystal composition according to any one of claims 1 to 12, comprising a polar compound represented by formula (5-1) as the first additive.

In Formula (5-1), R ¹³ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — is —CH═CH—, —CF═CH—, —CH═. CF—, —C≡C—, or cycloalkylene having 3 to 8 carbon atoms may be substituted, and in these groups, at least one hydrogen may be replaced with fluorine or chlorine; R ¹⁴ is carbon In the alkyl, at least one —CH ₂ — is —NR ⁰ —, —O—, —S—, —CO—, —COO—, —OCO—, —OCOO—. Or at least one tertiary carbon (> CH-) may be replaced with nitrogen (> N-), and in these groups, Least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbon atoms, provided that R ¹⁴ is an oxygen atom of the OH structure, the sulfur atom of the SH structure And at least one nitrogen atom of a primary, secondary, or tertiary amine structure. The formula (4) and the formula (5) according to claim 11, wherein R ⁸ is a monovalent group selected from the group of groups represented by formula (A1) to formula (A4). The liquid crystal composition described.

In formula (A1) to formula (A4), Sp ⁴ , Sp ⁶ , and Sp ⁷ are each independently a single bond or a group (—Sp ″ —X ″ —), where Sp ″ is , Alkylene having 1 to 20 carbon atoms, in which at least one —CH ₂ — is —O—, —S—, —NH—, —N (R ⁰ ) —, —CO—, —CO—. O-, -O-CO, -O-CO-O-, -S-CO-, -CO-S-, -N ( ^R0 ) -CO-O-, -O-CO-N ( ^R0 ). -, -N ( ^R0 ) -CO-N ( ^R0 )-, -CH = CH-, or -C≡C-, in which at least one hydrogen is fluorine, May be replaced by chlorine, or —CN, and X ″ represents —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—C. O—O—, —CO—N (R ⁰ ) —, —N (R ⁰ ) —CO—, —N (R ⁰ ) —CO—N (R ⁰ ) —, —OCH ₂ —, —CH ₂ O _{-, - SCH 2 -, -} CH 2 S -, - CF 2 O -, - OCF 2 -, - CF 2 S -, - SCF 2 -, - CF 2 CH 2 -, - CH 2 CF 2 -, - CF ₂ CF ₂ —, —CH═N—, —N═CH—, —N═N—, —CH═CR ⁰ —, —CY ² = CY ³ —, —C≡C—, —CH═CH— CO—O—, —O—CO—CH═CH—, or a single bond, where R ⁰ is hydrogen or alkyl of 1 to 12 carbons, and Y ² and Y ³ are independently hydrogen, fluorine, chlorine or be -CN,; Sp ^{5 is,> CH -,> CR a1} -,> N-, or> is C ^{<; X} 1 is, -OH, -OR ^{a _{, -COOH, -NH 2, -NHR a1}} , -N (R a1) 2, -SH, -SR a1,

Wherein R ⁰ is hydrogen or alkyl having 1 to 12 carbons; X ² is —O—, —CO—, ^—NH— , —NR ^a1 —, —S—, or a single bond Yes; Z ⁹ is an alkylene having 1 to 15 carbons, an alicyclic group having 5 or 6 carbons, or a combination thereof, in which at least one hydrogen is —OH, —OR ^a1 , —COOH, —NH ₂ , —NHR ^a1 , —N (R ^a1 ) ₂ , fluorine, or chlorine may be substituted; where R ^a1 is alkyl having 1 to 15 carbons, , At least one —CH ₂ — may be replaced by —C≡C—, —CH═CH—, —COO—, —OCO—, —CO—, or —O—, At least one hydrogen is fluorine Or may be replaced by chlorine; ring P is an aromatic group having 6 to 25 carbon atoms or an alicyclic group having 3 to 25 carbon atoms, and these groups may be condensed rings, in the group, the three hydrogen from one may be replaced by ^{R L,} where ^R L _{is, -OH, - (CH 2)} r -OH, fluorine, chlorine, -CN, _-NO 2, - NCO, —NCS, —OCN, —SCN, —C (═O) N (R ⁰ ) ₂ , —C (═O) R ⁰ , —N (R ⁰ ) ₂ , — (CH ₂ ) _r —N ( R ⁰ ) ₂ , —SH, —SR ⁰ , aryl having 6 to 20 carbon atoms, heteroaryl having 6 to 20 carbon atoms, alkyl having 1 to 25 carbon atoms, alkoxy having 1 to 25 carbon atoms, and 2 to 25 carbon atoms Alkylcarbonyl, alkoxycarbonyl having 2 to 25 carbon atoms, carbon number 2 to 25 An alkoxycarbonyloxy alkylcarbonyloxy or C 2 to 25, in these groups, at least one hydrogen may be replaced by fluorine or chlorine, wherein R ⁰ is hydrogen or C 1 -C 12 is alkyl, and r is 1, 2, 3, or 4; p is 0, 1, 2, or 3; q is 2, 3, 4, or 5. The liquid crystal composition according to claim 11 or 12, wherein the first additive is a compound selected from the group of compounds represented by formula (4-1-1) to formula (4-1-4).

In the formula (4-1-1) to the formula (4-1-4), R ¹⁵ is alkyl having 1 to 8 carbons or fluorine; and the ring Q and the ring R are independently 1,4-cyclohexyl. Silene, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2-fluoro-1,3-phenylene, 2-ethyl-1,4-phenylene, 2,6-diethyl-1,4-phenylene, 2-trifluoromethyl-1,4-phenylene, 2,3-difluoro-1,4-phenylene, 2,5-difluoro-1,4-phenylene, 2,6-difluoro-1,4-phenylene, or 2 , 3,5,6-tetrafluoro-1,4-phenylene; ring S is cyclohexyl or phenyl; Z ¹⁰ is a single bond, —CH ₂ CH ₂ —, —COO—, or —OCO—. Z ¹¹ is A single bond, an alkylene having 1 to 15 carbon atoms, an alicyclic group having 5 or 6 carbon atoms, or a combination thereof, in which at least one hydrogen is —OH, —OR ^a1 , —COOH , —NH ₂ , —NHR ^a1 , —N (R ^a1 ) ₂ , fluorine, or chlorine, where R ^a1 is alkyl having 1 to 15 carbons, and in this alkyl, at least 1 Two —CH ₂ — may be replaced by —C≡C—, —CH═CH—, —COO—, —OCO—, —CO—, or —O—, in which at least one of Hydrogen may be replaced by fluorine or chlorine; Sp ⁴ is a single bond, —CH ₂ CH ₂ —, —CH ₂ CH ₂ CH ₂ —, —CH ₂ O—, or —OCH ₂ —; Sp ⁷ is a single bond or alkylene having 1 to 5 carbon atoms, in which —CH ₂ — may be replaced by —O— or —NH—; s is 0, 1, 2, 3, X ³ is —OH, —COOH, —SH, —OCH ₃ , or —NH ₂ ; X ⁴ is a single bond or —O—. The liquid crystal composition according to claim 11 or 13, wherein the first additive is a compound selected from the group of compounds represented by formula (5-1-1) to formula (5-1-29).

In the formulas (5-1-1) to (5-1-29), R ¹³ is alkyl having 4 to 20 carbons, and in this alkyl, at least one —CH ₂ — is —CH═CH -, -CF = CH-, -CH = CF-, -C≡C-, or cycloalkylene having 3 to 8 carbon atoms, in which at least one hydrogen is fluorine or chlorine It may be replaced.   The liquid crystal composition according to any one of claims 1 to 16, wherein the proportion of the first additive is in the range of 0.05 wt% to 10 wt% based on the weight of the liquid crystal composition. The liquid crystal composition according to claim 1, which contains a polymerizable compound represented by formula (6) as the second additive.

In formula (6), ring T and ring V are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-2-yl, pyrimidine- 2-yl or pyridin-2-yl, and in these rings, at least one hydrogen is fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or at least one hydrogen. C 1-12 alkyl substituted with fluorine or chlorine may be substituted; ring U may be 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1, 2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1, -Diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5- Diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl, or pyridine-2,5-diyl, in which at least one hydrogen is fluorine, chlorine, carbon number 1 to 12 alkyl, 1 to 12 carbon alkoxy, or at least one hydrogen may be replaced by 1 to 12 carbon alkyl substituted with fluorine or chlorine; Z ¹² and Z ¹³ are independently is a single bond or alkylene having 1 to 10 carbon atoms, in the alkylene, at least one of _-CH 2 -, -O -, - CO- -COO-, or it may be replaced by -OCO-, and at least one _-CH 2 CH ₂ - _{is, -CH = CH -, - C} (CH 3) = CH -, - CH = C (CH 3 ) —, Or —C (CH ₃ ) ═C (CH ₃ ) —, in which at least one hydrogen may be replaced by fluorine or chlorine; P ⁴ , P ⁵ , And P ⁶ are polymerizable groups; Sp ⁹ , Sp ¹⁰ , and Sp ¹¹ are each independently a single bond or alkylene having 1 to 10 carbon atoms, and in the alkylene, at least one —CH ₂ — It is, -O -, - COO -, - OCO-, or may be replaced by -OCOO-, and at least one _-CH 2 CH ₂ - is replaced by -CH = CH- or -C≡C- In these groups, at least one hydrogen may be replaced by fluorine or chlorine; t is 0, 1, or 2; u, v, and w are independently 0, 1, 2, 3, or 4 and the sum of u, v, and w is 1 or greater. The polymerization according to claim 18, wherein P ⁴ , P ⁵ and P ⁶ are independently selected from the group of groups represented by formula (P-1) to formula (P-5). The liquid crystal composition according to claim 18, which is a functional group.

In formulas (P-1) to (P-5), M ¹ , M ² , and M ³ are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or at least one hydrogen is fluorine or chlorine 1-5 alkyl substituted with The liquid crystal according to any one of claims 1 to 19, comprising a polymerizable compound selected from the group of compounds represented by formulas (6-1) to (6-28) as a second additive. Composition.

In formula (6-1) to formula (6-28), P ⁴ , P ⁵ and P ⁶ are independently from the group of groups represented by formula (P-1) to formula (P-3). A selected polymerizable group;

Wherein M ¹ , M ² , and M ³ are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine. Sp ⁹ , Sp ¹⁰ and Sp ¹¹ are each independently a single bond or alkylene having 1 to 10 carbons, in which at least one —CH ₂ — represents —O—, —COO—, —; OCO—, or —OCOO— may be replaced, and at least one —CH ₂ CH ₂ — may be replaced with —CH═CH— or —C≡C—, and in these groups, at least One hydrogen may be replaced with fluorine or chlorine.   21. The liquid crystal composition according to any one of claims 18 to 20, wherein the ratio of the second additive is in the range of 0.03% to 10% by weight based on the weight of the liquid crystal composition.   The liquid crystal display element containing the liquid-crystal composition of any one of Claim 1 to 21.   The liquid crystal display element according to claim 22, wherein an operation mode of the liquid crystal display element is an IPS mode, a VA mode, an FFS mode, or an FPA mode, and a driving method of the liquid crystal display element is an active matrix method.   A liquid crystal display element of a polymer-supported alignment type, comprising the liquid crystal composition according to any one of claims 1 to 21, wherein a polymerizable compound in the liquid crystal composition is polymerized.   A liquid crystal display element comprising the liquid crystal composition according to any one of claims 1 to 21, wherein the polymerizable compound in the liquid crystal composition is polymerized and does not have an alignment film.   Use of the liquid crystal composition according to any one of claims 1 to 21 in a liquid crystal display device.   Use of the liquid crystal composition according to any one of claims 1 to 21 in a polymer supported alignment type liquid crystal display device.   Use of the liquid crystal composition according to any one of claims 1 to 21 in a liquid crystal display device having no alignment film.