WO2018123180A1 - Composition de cristaux liquides, et élément d'affichage à cristaux liquides - Google Patents

Composition de cristaux liquides, et élément d'affichage à cristaux liquides Download PDF

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Publication number
WO2018123180A1
WO2018123180A1 PCT/JP2017/035623 JP2017035623W WO2018123180A1 WO 2018123180 A1 WO2018123180 A1 WO 2018123180A1 JP 2017035623 W JP2017035623 W JP 2017035623W WO 2018123180 A1 WO2018123180 A1 WO 2018123180A1
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liquid crystal
carbons
compound
diyl
hydrogen
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PCT/JP2017/035623
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English (en)
Japanese (ja)
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将之 齋藤
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Jnc株式会社
Jnc石油化学株式会社
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Priority to KR1020197013745A priority Critical patent/KR102462887B1/ko
Priority to JP2018558825A priority patent/JP6988829B2/ja
Publication of WO2018123180A1 publication Critical patent/WO2018123180A1/fr

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    • C—CHEMISTRY; METALLURGY
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    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C—CHEMISTRY; METALLURGY
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    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
    • C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
    • C09K2019/3004—Cy-Cy
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
    • C09K2019/3009—Cy-Ph
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3028—Cyclohexane rings in which at least two rings are linked by a carbon chain containing carbon to carbon single bonds
    • C09K2019/3036—Cy-C2H4-Ph
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
    • C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
    • C09K2019/3071—Cy-Cy-COO-Cy

Definitions

  • the present invention relates to a liquid crystal composition containing a piperidine derivative, a liquid crystal display device containing the composition, and the like.
  • the present invention relates to a liquid crystal composition having a negative dielectric anisotropy and a device containing the composition and having a mode such as IPS, VA, FFS, and FPA.
  • the present invention also relates to a polymer-supported orientation type element.
  • the classification based on the operation mode of the 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. (In-plane switching), VA (vertical alignment), FFS (fringe field switching), FPA (field-induced photo-reactive alignment) mode.
  • the classification based on the element drive system is PM (passive matrix) and AM (active matrix). PM is classified into static, multiplex, etc., and AM is classified into TFT (thin film insulator), MIM (metal film insulator), 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 relationships in these properties are 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 upper limit temperature of the nematic phase is about 70 ° C. or more, and a preferred lower limit 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 ( ⁇ n ⁇ d) of the optical anisotropy ( ⁇ n) 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 ⁇ m to about 0.40 ⁇ m for the VA mode element and in the range of about 0.20 ⁇ m to about 0.30 ⁇ m for the IPS mode or FFS mode element.
  • 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 in the initial stage is preferable.
  • a composition having a large specific resistance after being used for a long time is preferred.
  • the stability of the composition against ultraviolet rays 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.
  • a polymer-supported alignment (PSA) type liquid crystal display element In a general-purpose liquid crystal display element, vertical alignment of liquid crystal molecules is achieved by a specific polyimide alignment film.
  • PSA polymer-supported alignment
  • a polymer is combined with an alignment film.
  • a composition to which a small amount of a polymerizable compound is added is injected into the device.
  • 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.
  • 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.
  • a composition having a positive dielectric anisotropy is used for an AM device having a TN mode.
  • a composition having a negative dielectric anisotropy is used in an AM device having a VA mode.
  • a composition having a positive or negative dielectric anisotropy is used in an AM device having an IPS mode or an FFS mode.
  • a composition having positive or negative dielectric anisotropy is used in a polymer-supported orientation type AM device.
  • a composition containing a compound similar to the compound (1) of the present invention is disclosed in Patent Documents 1 and 2.
  • One object of the present invention is to provide a high maximum temperature of the nematic phase, a low minimum temperature of the nematic phase, a small viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a large specific resistance, and a high stability to ultraviolet light.
  • Another object of the present invention is to provide a liquid crystal composition satisfying at least one of characteristics such as high stability against heat and suppression of display failure such as afterimage.
  • Another object is to provide a liquid crystal composition having an appropriate balance between at least two of these properties.
  • Another object is to provide a liquid crystal display device containing such a composition.
  • Another object is to provide 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.
  • the present invention provides at least one compound selected from the group of compounds represented by formula (1) as the first additive and at least one selected from the group of compounds represented by formula (2) as the first component
  • the present invention relates to a liquid crystal composition containing two compounds and having a negative dielectric anisotropy, and a liquid crystal display device containing this composition.
  • R 1 and R 2 are independently hydrogen, hydroxy, oxy radical, alkyl having 1 to 12 carbons, or alkoxy having 1 to 12 carbons;
  • R 3 and R 4 is independently 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;
  • One advantage of the present invention is that the upper limit temperature of the nematic phase, the lower limit temperature of the nematic phase, the small viscosity, the appropriate optical anisotropy, the negative dielectric constant anisotropy, the large specific resistance, and the high stability to ultraviolet rays.
  • Another object of the present invention is to provide a liquid crystal composition satisfying at least one of characteristics such as high stability against heat and suppression of display failure such as afterimage.
  • Another advantage is to provide a liquid crystal composition having an appropriate balance between at least two of these properties.
  • Another advantage is to provide a liquid crystal display device containing such a composition.
  • Another advantage is to provide 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.
  • 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.
  • a liquid crystalline compound having alkenyl is not polymerizable in that sense.
  • 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 ratio of the liquid crystal compound is represented by a mass percentage (% by mass) based on the mass of the liquid crystal composition not containing the additive even when the additive is added.
  • the ratio of the additive is expressed as a mass percentage (% by mass) based on the mass of the liquid crystal composition not containing the additive. That is, the ratio of the liquid crystal compound and the additive is calculated based on the total mass of the liquid crystal compound. Mass parts per million (ppm) may be used.
  • the ratio of the polymerization initiator and the polymerization inhibitor is exceptionally expressed based on the mass of the polymerizable compound.
  • the upper limit temperature of the nematic phase may be abbreviated as “the upper limit 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 in the initial stage and a large specific resistance after long-term use.
  • “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 use. It means having a retention rate.
  • the characteristics of the composition and the device may be examined by a aging test.
  • 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.
  • Expressions such as “at least one —CH 2 — may be replaced by —O—” are used herein.
  • —CH 2 —CH 2 —CH 2 — may be converted to —O—CH 2 —O— by replacing non-adjacent —CH 2 — with —O—.
  • adjacent —CH 2 — is not replaced by —O—.
  • —O—O—CH 2 — (peroxide) is formed by this replacement. That is, this 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—.
  • the symbol of the terminal group R 1 is used for a plurality of compounds.
  • two groups represented by two arbitrary R 1 may be the same or different.
  • R 1 of the compound (1-1) is ethyl and R 1 of the compound (1-2) is ethyl.
  • R 1 of compound (1-1) is ethyl and R 1 of compound (1-2) is propyl.
  • This rule also applies to other symbols.
  • the formula (2) when the subscript 'a' is 2, there are two rings A. 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 the subscript 'a' is greater than 2. This rule also applies to other symbols. This rule also applies when a compound has a substituent represented by the same symbol.
  • 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.
  • the diagonal line across one side of the hexagon represents that any hydrogen on the ring may be replaced with a group such as —Sp 1 —P 1 .
  • a subscript such as 'e' indicates the number of groups replaced. When the subscript 'e' is 0 (zero), there is no such replacement. When the subscript 'e' is 2 or more, a plurality of -Sp 1 -P 1 exists on the ring F.
  • the plurality of groups represented by —Sp 1 —P 1 may be the same or different.
  • ring A and ring B are independently X, Y, or Z”, since there are plural subjects, “independently” is used. When the subject is “ring A”, since the subject is singular, “independently” is not used.
  • 2-Fluoro-1,4-phenylene means the following two divalent groups.
  • fluorine may be leftward (L) or rightward (R).
  • This rule also applies to bilaterally asymmetric groups produced 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. As the configuration of 1,4-cyclohexylene, trans is preferable to cis for increasing the maximum temperature.
  • the present invention includes the following items.
  • Item 1 Containing at least one compound selected from the group of compounds represented by formula (1) as the first additive and at least one compound selected from the group of compounds represented by formula (2) as the first component And a liquid crystal composition having negative dielectric anisotropy.
  • R 1 and R 2 are independently hydrogen, hydroxy, oxy radical, alkyl having 1 to 12 carbons, or alkoxy having 1 to 12 carbons;
  • R 3 and R 4 is independently 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;
  • 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, naphthalene-2,6-d
  • Item 2. The liquid crystal composition according to item 1, containing at least one compound selected from the group of compounds represented by formulas (1-1) to (1-3) as a first additive.
  • R 1 and R 2 are independently hydrogen, hydroxy, oxy radical, alkyl having 1 to 12 carbons, or alkoxy having 1 to 12 carbons. .
  • Item 3. The liquid crystal composition according to item 1 or 2, wherein R 1 is hydrogen, and R 2 is hydroxy, oxy radical, alkyl having 1 to 12 carbons, or alkoxy having 1 to 12 carbons.
  • Item 4. The liquid crystal composition according to any one of items 1 to 3, comprising at least one compound selected from the group of compounds represented by formulas (2-1) to (2-22) as a first component: object.
  • 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 It is alkenyloxy having 2 to 12 carbon atoms.
  • Item 5 The liquid crystal composition according to any one of items 1 to 4, wherein the ratio of the first additive is in the range of 0.005% by mass to 1% by mass.
  • Item 6. The liquid crystal composition according to any one of items 1 to 5, wherein the ratio of the first component is in the range of 10% by mass to 90% by mass.
  • Item 7. The liquid crystal composition according to any one of items 1 to 6, comprising at least one compound selected from the group of compounds represented by formula (3) as the second component.
  • R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, and at least one hydrogen is replaced by fluorine or chlorine Or alkyl having 1 to 12 carbon atoms or alkenyl having 2 to 12 carbon atoms in which at least one hydrogen is replaced by fluorine or chlorine;
  • Ring D and Ring E are each independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene, or 2,5-difluoro-1,4-phenylene;
  • Z 4 is a single bond, ethylene, or carbonyloxy;
  • c is 1 2, or 3.
  • Item 8. The liquid crystal composition according to any one of items 1 to 7, comprising at least one compound selected from the group of compounds represented by formulas (3-1) to (3-13) as a second component: object.
  • R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, It is alkyl having 1 to 12 carbons in which one hydrogen is replaced with fluorine or chlorine, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced with fluorine or chlorine.
  • Item 9. The liquid crystal composition according to item 7 or 8, wherein the ratio of the second component is in the range of 10% by mass to 90% by mass.
  • Item 10 The liquid crystal composition according to any one of items 1 to 9, comprising at least one compound selected from the group of polymerizable compounds represented by formula (4) as the second additive.
  • ring F and ring I 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 is fluorine.
  • ring G 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-diylene
  • At least one hydrogen may be replaced by fluorine or chlorine; d is 0, 1, or 2; e, f, and g are independently 0, 1, 2, 3 or 4, and the sum of e, f, and g is 1 or greater.
  • P 1 , P 2 , and P 3 are groups independently selected from the group of polymerizable groups represented by formula (P-1) to formula (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
  • Item 12. The item according to any one of Items 1 to 11, comprising at least one compound selected from the group of polymerizable compounds represented by Formula (4-1) to Formula (4-27) as the second additive. Liquid crystal composition.
  • P 4 , P 5 , and P 6 are each independently a polymerizable group represented by formula (P-1) to formula (P-3).
  • 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 1 , Sp 2 , and Sp 3 are each independently a single bond or alkylene having 1 to 10 carbons, in which at least one —CH 2 — is —O—, —COO—, —OCO—, or —OCOO— may be substituted, and at least one —CH 2 CH 2 — may be substituted with —CH ⁇ CH— or —C ⁇ C—, and in these groups, at least One hydrogen may be replaced with fluorine or chlorine.
  • Item 13 The liquid crystal composition according to any one of items 10 to 12, wherein the ratio of the second additive is in the range of 0.03% by mass to 10% by mass.
  • Item 14 A liquid crystal display device comprising the liquid crystal composition according to any one of items 1 to 13.
  • Item 15 The liquid crystal display element according to item 14, wherein the operation mode of the liquid crystal display element is an IPS mode, a VA mode, an FFS mode, or an FPA mode, and the driving method of the liquid crystal display element is an active matrix method.
  • Item 16 A polymer-supported alignment type liquid crystal display device comprising the liquid crystal composition according to any one of items 10 to 13, wherein a second additive contained in the liquid crystal composition is polymerized.
  • Item 17. Use of a liquid crystal composition according to any one of items 1 to 13 in a liquid crystal display device.
  • Item 18. Use of the liquid crystal composition according to any one of items 1 to 13 in a polymer supported alignment type liquid crystal display element.
  • the present invention includes the following items.
  • A The above-mentioned further containing at least one of an additive such as an optically active compound, an antioxidant, an ultraviolet absorber, a dye, an antifoaming agent, a polymerizable compound, a polymerization initiator, a polymerization inhibitor, and a polar compound Composition.
  • B An AM device containing the above composition.
  • C A polymer-supported orientation (PSA) type AM device containing the above composition further containing a polymerizable compound.
  • D A polymer-supported orientation (PSA) type AM device comprising the above-described composition, wherein the polymerizable compound in the composition is polymerized.
  • (E) A device containing the above composition and having a mode of PC, TN, STN, ECB, OCB, IPS, VA, FFS, or FPA.
  • (F) A transmissive device containing the above composition.
  • (G) Use of the above composition as a composition having a nematic phase.
  • (H) Use as an optically active composition by adding an optically active compound to the above composition.
  • the brightness may decrease partially.
  • An example is a line afterimage, which is a phenomenon in which the luminance between the electrodes decreases in a streak-like manner when different voltages are repeatedly applied to two adjacent electrodes. This phenomenon is caused by accumulation of ionic impurities contained in the liquid crystal composition on the alignment film near the electrode. Therefore, in order to suppress the line afterimage, it is effective to prevent the ionic impurities from being localized on the alignment film.
  • the surface of the alignment film is coated with an additive such as a polar compound, and ionic impurities are adsorbed on the additive. It is important that such an additive has high solubility in the liquid crystal composition in order to obtain the desired effect.
  • the liquid crystal composition is injected from the injection port into the device under reduced pressure.
  • the device is filled with the composition without changing the proportion of its components.
  • additives such as polar compounds may be adsorbed on the alignment film. When the adsorption speed is high, the additive may not reach the back of the device. The additive is left behind because the rate of adsorption is greater than the rate of injection. In order to prevent this phenomenon, an additive having an appropriate adsorptivity to the alignment film is preferable. Therefore, it is also important to select an additive having an appropriate polarity.
  • Compound (1) is suitable for this purpose.
  • 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 and the device will be described. 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.
  • This composition contains a plurality of liquid crystal compounds.
  • the composition may contain additives. Additives include optically active compounds, antioxidants, ultraviolet absorbers, dyes, antifoaming agents, polymerizable compounds, polymerization initiators, polymerization inhibitors, polar compounds and the like.
  • This composition is classified into a composition A and a composition B from the viewpoint of a liquid crystal compound.
  • the composition A may further contain other liquid crystal compounds, additives and the like in addition to the liquid crystal compound selected from the compound (2) and the compound (3).
  • the “other liquid crystal compound” is a liquid crystal compound different from the compound (2) and the compound (3). Such compounds are mixed into the composition for the purpose of further adjusting the properties.
  • Composition B consists essentially of a liquid crystalline compound selected from compound (2) and compound (3). “Substantially” means that the composition B may contain an additive but does not contain any 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.
  • the main characteristics of the component compounds and the main effects of the compounds on the composition and the device will be explained.
  • the main characteristics of the component compounds are summarized in Table 2 based on the effects of the present invention.
  • L means large or high
  • M means moderate
  • S means small or low.
  • L, M, and S are classifications based on a qualitative comparison among the component compounds, and 0 (zero) means extremely small.
  • Compound (1) contributes to suppression of display defects. Since compound (1) is added in an extremely small amount, in many cases it does not affect properties such as the maximum temperature, optical anisotropy, and dielectric anisotropy.
  • Compound (2) increases the dielectric anisotropy and decreases the minimum temperature.
  • Compound (3) decreases the viscosity or increases the maximum temperature. Since the compound (4) is polymerizable, it 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.
  • Preferred combinations of the components in the composition are compound (1) + compound (2), compound (1) + compound (3), compound (1) + compound (2) + compound (3), compound (1) + compound (2) + Compound (4), Compound (1) + Compound (3) + Compound (4), or Compound (1) + Compound (2) + Compound (3) + Compound (4).
  • a further preferred combination is compound (1) + compound (2) + compound (3) or compound (1) + compound (2) + compound (3) + compound (4).
  • a desirable ratio of compound (1) is approximately 0.005% by mass or more for suppressing poor display, and approximately 1% by mass or less for decreasing the minimum temperature.
  • a more desirable ratio is in the range of approximately 0.02% by mass to approximately 0.5% by mass.
  • a particularly desirable ratio is in the range of approximately 0.12% by mass to approximately 0.3% by mass.
  • a desirable ratio of the compound (2) is approximately 10% by mass or more for increasing the dielectric anisotropy, and approximately 90% by mass or less for decreasing the minimum temperature.
  • a more desirable ratio is in the range of approximately 20% by mass to approximately 80% by mass.
  • a particularly desirable ratio is in the range of approximately 30% by mass to approximately 75% by mass.
  • a desirable ratio of compound (3) is approximately 10% by mass or more for increasing the maximum temperature or decreasing the viscosity, and approximately 90% by mass or less for increasing the dielectric anisotropy.
  • a more desirable ratio is in the range of approximately 20% by mass to approximately 80% by mass.
  • a particularly desirable ratio is in the range of approximately 30% by mass to approximately 70% by mass.
  • Compound (4) is added to the composition for the purpose of adapting to a polymer-supported orientation type device.
  • a desirable ratio of compound (4) is approximately 0.03% by mass or more for aligning liquid crystal molecules, and approximately 10% by mass or less for preventing display defects of the device.
  • a more desirable ratio is in the range of approximately 0.1% by mass to approximately 2% by mass.
  • a particularly desirable ratio is in the range of approximately 0.2% by mass to approximately 1.0% by mass.
  • R 1 and R 2 are independently hydrogen, hydroxy, oxy radical, alkyl having 1 to 12 carbons, or alkoxy having 1 to 12 carbons. is there.
  • a preferable combination of R 1 and R 2 is both hydrogen for increasing the stability to ultraviolet rays and heat, and one is hydrogen and the other is hydroxy in order to suppress poor display and lower the minimum temperature. It is an oxy radical or alkyl having 1 to 12 carbons.
  • 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 alkenyloxy having 2 to 12 carbons.
  • Desirable R 3 or R 4 is alkyl having 1 to 12 carbons for increasing the stability to ultraviolet light or heat, and alkoxy having 1 to 12 carbons for increasing the dielectric anisotropy.
  • R 5 and R 6 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or 1 to 1 carbons in which at least one hydrogen is replaced by fluorine or chlorine. 12 alkyls or alkenyls having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.
  • Desirable R 5 or R 6 is alkenyl having 2 to 12 carbons for decreasing the viscosity, and alkyl having 1 to 12 carbons for increasing the stability to ultraviolet light or heat.
  • Preferred alkyl is methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl or octyl. More desirable alkyl is methyl, ethyl, propyl, butyl or pentyl 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 preferred for 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.
  • 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.
  • alkenyl in which at least one hydrogen is replaced by fluorine 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 for decreasing the viscosity, tetrahydropyran-2,5-diyl for increasing the dielectric anisotropy, and for increasing the optical anisotropy.
  • 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 for decreasing the viscosity, and 2-chloro-3-fluoro-1,4-phenylene for decreasing the optical anisotropy.
  • 7,8-difluorochroman-2,6-diyl In order to increase the anisotropy, 7,8-difluorochroman-2,6-diyl. Tetrahydropyran-2,5-diyl is Or And preferably It is.
  • 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. Desirable 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.
  • Z 1 is alkylene having 1 to 7 carbons. Desirable Z 1 is alkylene having 2 carbons for increasing the stability to ultraviolet light or heat, and alkylene having 4 or 6 carbons for decreasing the minimum temperature.
  • Z 2 and Z 3 are independently a single bond, ethylene, carbonyloxy, or methyleneoxy. Desirable Z 2 or Z 3 is a single bond for decreasing the viscosity, ethylene for decreasing the minimum temperature, and methyleneoxy for increasing the dielectric anisotropy.
  • Z 4 is a single bond, ethylene, or carbonyloxy. Desirable Z 4 is a single bond for increasing the stability to ultraviolet light and heat.
  • 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.
  • P 1 , P 2 , and P 3 are independently a polymerizable group.
  • Preferred P 1, P 2 or P 3 is a polymerizable group selected from the group of radicals represented by the formula (P-1) by the formula (P-5). More desirable P 1 , P 2 , or P 3 is a group (P-1) or a group (P-2).
  • a particularly preferred group (P-1) is —OCO—CH ⁇ CH 2 or —OCO—C (CH 3 ) ⁇ CH 2 .
  • the wavy line from the group (P-1) to the group (P-5) indicates the site to be bound.
  • 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 methyl, and more preferred M 2 or M 3 is hydrogen.
  • P 4 , P 5 , and P 6 are independently groups represented by formulas (P-1) to (P-3).
  • Preferable P 4 , P 5 or P 6 is a group (P-1) or a group (P-2).
  • Further preferred group (P-1) is —OCO—CH ⁇ CH 2 or —OCO—C (CH 3 ) ⁇ CH 2 .
  • the wavy line from the group (P-1) to the group (P-3) indicates a bonding site.
  • Sp 1 , Sp 2 , and Sp 3 are each independently a single bond or alkylene having 1 to 10 carbons, in which at least one —CH 2 — is —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—
  • at least one hydrogen may be replaced by fluorine or chlorine.
  • Ring F and Ring I are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl, 1,3-dioxane-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 F or ring I is phenyl.
  • Ring G 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,
  • Z 5 and Z 6 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 — OCO— may be substituted, and at least one —CH 2 CH 2 — may be —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.
  • Preferred Z 5 or Z 6 is a single bond, -CH 2 CH 2 -, - CH 2 O -, - OCH 2 -, - COO-, or -OCO-. Further preferred Z 5 or Z 6 is a single bond.
  • D is 0, 1, or 2.
  • Preferred d is 0 or 1.
  • e, f, and g are independently 0, 1, 2, 3, or 4, and the sum of e, f, and g is 1 or greater.
  • Preferred e, f, or g is 1 or 2.
  • Desirable compounds (1) are the compounds (1-1) to (1-3) described in item 2.
  • Desirable compound (2) is the compound (2-1) to the compound (2-22) according to item 4.
  • at least one of the first components is the compound (2-1), the compound (2-3), the compound (2-4), the compound (2-6), the compound (2-8), or the compound (2-10) is preferred.
  • At least two of the first components are compound (2-1) and compound (2-6), compound (2-1) and compound (2-10), compound (2-3) and compound (2-6), The compound (2-3) and the compound (2-10), the compound (2-4) and the compound (2-6), or a combination of the compound (2-4) and the compound (2-8) is preferable.
  • Desirable compound (3) is the compound (3-1) to the compound (3-13) according to item 8.
  • at least one of the second components is the compound (3-1), the compound (3-3), the compound (3-5), the compound (3-6), the compound (3-8), or the compound (3-9) is preferred.
  • At least two of the second components are the compound (3-1) and the compound (3-3), the compound (3-1) and the compound (3-5), or the compound (3-1) and the compound (3-6). It is preferable that it is the combination of these.
  • Desirable compound (4) is the compound (4-1) to the compound (4-27) according to item 12.
  • at least one of the second additives is compound (4-1), compound (4-2), compound (4-24), compound (4-25), compound (4-26), or The compound (4-27) is preferable.
  • At least two of the second additives are compound (4-1) and compound (4-2), compound (4-1) and compound (4-18), compound (4-2) and compound (4-24).
  • 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 to give a twist angle.
  • Examples of such compounds are compound (5-1) to compound (5-5).
  • a desirable ratio of the optically active compound is approximately 5% by mass or less.
  • a more desirable ratio is in the range of approximately 0.01% by mass to approximately 2% by mass.
  • an antioxidant is composed. Added to the product.
  • a preferred example of the antioxidant is a compound (6) wherein n is an integer of 1 to 9.
  • n 1, 3, 5, 7, or 9. Further preferred n is 7. Since the compound (6) 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 using the device 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.
  • the ultraviolet absorber examples 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 it to a GH (guest host) mode element.
  • a preferred ratio of the dye is in the range of approximately 0.01% by mass to approximately 10% by mass.
  • 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 (4) is suitable for this purpose.
  • a polymerizable compound different from the compound (4) may be added to the composition together with the compound (4).
  • a polymerizable compound different from the compound (4) may be added to the composition.
  • Preferable examples of such a polymerizable compound 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 derivatives.
  • the polymerization reactivity and the pretilt angle of the liquid crystal molecules are adjusted. can do.
  • the pretilt angle 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.
  • Polymerizable compound is polymerized by ultraviolet irradiation.
  • the polymerization may be performed in the presence of an initiator such as a photopolymerization initiator.
  • an initiator such as a photopolymerization initiator.
  • Appropriate conditions for polymerization and the appropriate type and amount of initiator are known to the person skilled in the art and are described in the literature.
  • Irgacure 651 registered trademark; BASF
  • Irgacure 184 registered trademark; BASF
  • Darocur 1173 registered trademark; BASF
  • a desirable ratio of the photopolymerization initiator is in the range of approximately 0.1% by mass to approximately 5% by mass based on the mass of the polymerizable compound.
  • a more desirable ratio is in the range of approximately 1% by mass to approximately 3% by mass.
  • a polymerization inhibitor When storing the polymerizable compound, a polymerization inhibitor may be added to prevent polymerization.
  • the polymerizable compound is usually added to the composition without removing the polymerization inhibitor.
  • 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.
  • 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.
  • the polar compound has at least one of partial structures such as —OH, —COOH, —SH, —NH 2 ,>NH,> N—.
  • compositions are prepared from the compound thus obtained by known methods. For example, the component compounds are mixed and dissolved in each other by heating.
  • 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.
  • 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 VA, OCB, IPS mode or FFS mode is particularly preferable.
  • 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.
  • NCAP non-curvilinear-aligned-phase
  • PD polymer-dispersed
  • An example of a method for producing a polymer-supported orientation type element 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.
  • the present invention will be described in more detail with reference to examples. The invention is not limited by these examples.
  • the present invention includes a mixture of the composition of Example 1 and the composition of Example 2.
  • the present invention also includes a mixture in which at least two of the compositions of the composition examples are mixed.
  • the synthesized compound was identified by a method such as NMR analysis. The characteristics of the compound, composition and device were measured by the methods described below.
  • NMR analysis DRX-500 manufactured by Bruker BioSpin Corporation was used for measurement.
  • the sample was dissolved in a deuterated solvent such as CDCl 3, and the measurement was performed at room temperature, 500 MHz, and 16 times of integration.
  • Tetramethylsilane was used as an internal standard.
  • CFCl 3 was used as an internal standard and the number of integrations was 24.
  • 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
  • br is broad.
  • 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.
  • capillary column DB-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m; 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 mass), and 1 ⁇ L thereof was injected into the sample vaporization chamber.
  • the recorder is a C-R5A Chromatopac manufactured by Shimadzu Corporation, or an equivalent product.
  • the obtained gas chromatogram showed the peak retention time and peak area corresponding to the component compounds.
  • capillary column As a solvent for diluting the sample, chloroform, hexane or the like may be used.
  • the following capillary column may be used.
  • HP-1 from Agilent Technologies Inc. (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m), Rtx-1 from Restek Corporation (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m), BP-1 (length 30 m, inner diameter 0.32 mm, film thickness 0.25 ⁇ m) manufactured by SGE International Pty.
  • a capillary column CBP1-M50-025 length 50 m, inner diameter 0.25 mm, film thickness 0.25 ⁇ m
  • 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 crystalline compounds is analyzed by gas chromatography (FID).
  • the area ratio of peaks in the gas chromatogram corresponds to the ratio (mass ratio) of liquid crystal compounds.
  • the correction coefficient of each liquid crystal compound may be regarded as 1. Therefore, the ratio (% by mass) of the liquid crystal compound can be calculated from the peak area ratio.
  • Measurement sample When measuring the characteristics of the composition or the device, the composition was used as it was as a sample.
  • a sample for measurement was prepared by mixing this compound (15% by mass) with the mother liquid crystal (85% by mass). 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.
  • the ratio of the compound and the mother liquid crystal is 10% by mass: 90% by mass, 5% by mass: 95% by mass, and 1% by mass: 99% by mass in this order. changed.
  • 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 compound is indicated by mass%.
  • Measurement method The characteristics were measured by the following method. Many of these are the methods described in the JEITA standard (JEITA ED-2521B) deliberated and established by the Japan Electronics and Information Industry Association (JEITA), or a modified method thereof. Met. No thin film transistor (TFT) was attached to the TN device used for the measurement.
  • JEITA Japan Electronics and Information Industry Association
  • 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”.
  • T C Minimum temperature of nematic phase
  • a sample having a nematic phase is placed in a glass bottle and placed in a freezer at 0 ° C., ⁇ 10 ° C., ⁇ 20 ° C., ⁇ 30 ° C. and ⁇ 40 ° C. for 10 days. After storage, the liquid crystal phase was observed. For example, when the sample remained in a 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”.
  • Viscosity Bulk viscosity; ⁇ ; measured at 20 ° C .; mPa ⁇ s: An E-type viscometer manufactured by Tokyo Keiki Co., Ltd. was used for the measurement.
  • Viscosity (rotational viscosity; ⁇ 1; 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 put in a VA device having a distance (cell gap) between two glass substrates of 20 ⁇ m. 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 dielectric constants ( ⁇ and ⁇ ) were measured as follows. 1) Measurement of dielectric constant ( ⁇ ): An ethanol (20 mL) solution of octadecyltriethoxysilane (0.16 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 ⁇ m, 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 ( ⁇ ) in the major axis direction of the liquid crystal molecules was measured.
  • 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 ⁇ m 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.
  • 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%.
  • VHR-1 Voltage holding ratio
  • the TN device used for the measurement had a polyimide alignment film, and the distance between two glass substrates (cell gap) was 5 ⁇ m. . This element was sealed with an adhesive that was cured with ultraviolet rays after the sample was placed.
  • the TN device was charged by applying a pulse voltage (60 microseconds at 1 V).
  • the decaying voltage was measured with a high-speed voltmeter for 166.7 milliseconds, 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.
  • VHR-2 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 expressed as VHR-2.
  • VHR-3 Voltage holding ratio
  • the TN device used for the measurement had a polyimide alignment film, and the cell gap was 5 ⁇ m.
  • a sample was injected into this element and irradiated with light for 167 minutes.
  • the light source was black light (peak wavelength: 369 nm), and the distance between the element and the light source was 5 mm.
  • a voltage decaying for 166.7 milliseconds was measured.
  • a composition having a large VHR-3 has a large stability to ultraviolet light.
  • VHR-4 Voltage holding ratio
  • the TN device injected with the sample was heated in a thermostatic chamber at 120 ° C. for 20 hours, then the voltage holding ratio was measured, and stability against heat Evaluated. In the measurement of VHR-4, a decaying voltage was measured for 166.7 milliseconds. A composition having a large VHR-4 has a large stability to heat.
  • the response time was expressed as the time required for the change from 90% transmittance to 10% transmittance (fall time; millisecond).
  • Line afterimage (Line Image Sticking Parameter; LISP;%): A line afterimage was generated by applying electrical stress to the liquid crystal display element. The brightness of the area with the line afterimage and the brightness of the remaining area were measured. The rate at which the luminance decreased due to the line afterimage was calculated, and the size of the line afterimage was represented by this rate.
  • a sample is put into an FFS element (16 cells of 4 vertical cells ⁇ 4 horizontal cells) having a cell gap of 3.5 ⁇ m and having a matrix structure, and an adhesive that cures the element with ultraviolet rays is used. And sealed. Polarizers were arranged on the upper and lower surfaces of the element so that the polarization axes were orthogonal.
  • the device was irradiated with light and a voltage (rectangular wave, 60 Hz) was applied.
  • the voltage was increased stepwise by 0.1V in the range of 0V to 7.5V, and the brightness of transmitted light at each voltage was measured.
  • the voltage when the luminance reached the maximum was abbreviated as V255.
  • the voltage when the luminance was 21.6% of V255 (that is, 127 gradations) was abbreviated as V127.
  • V255 rectangular wave, 30 Hz
  • 0.5 V rectangular wave, 30 Hz
  • V127 rectangular wave, 0.25 Hz
  • the spreadability of the additive was qualitatively evaluated by applying a voltage to the device and measuring the luminance. The measurement of luminance was performed in the same manner as in the above item 14a. The voltage (V127) was set in the same manner as in the above item 14b. However, a VA element was used instead of the FFS element. The luminance was measured as follows. First, a DC voltage (2 V) was applied to the device for 2 minutes. Next, V127 (rectangular wave, 0.05 Hz) was applied, and the luminance was measured under the condition of an exposure time of 4000 milliseconds. The spreadability was evaluated from this result.
  • compositions examples are shown below.
  • the component compounds were represented by symbols based on the definitions in Table 3 below.
  • Table 3 the configuration regarding 1,4-cyclohexylene is trans.
  • the number in parentheses after the symbolized compound 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 mass percentage (% by mass) based on the mass of the liquid crystal composition containing no additive.
  • V-HB (2F, 3F) -O2 (2-1) 7% V2-BB (2F, 3F) -O2 (2-4) 10% V-HHB (2F, 3F) -O1 (2-6) 7% V-HHB (2F, 3F) -O2 (2-6) 9% V2-HHB (2F, 3F) -O2 (2-6) 8% 3-HH2B (2F, 3F) -O2 (2-7) 9% V-HBB (2F, 3F) -O2 (2-10) 7% V-HBB (2F, 3F) -O4 (2-10) 7% 2-HH-3 (3-1) 9% 3-HH-4 (3-1) 3% 3-HH-V (3-1) 15% 3-HH-V1 (3-1) 6% 1V2-HH-3 (3-1) 3%
  • the compound (1-1-1) was added to the composition at a ratio of 0.10% by mass, and the voltage holding ratio (VHR-3) was measured.
  • VHR-3 84.2%.
  • the line afterimage of the composition of Comparative Example 1 was 6.5%.
  • the line afterimages of the compositions of Example 1 and Example 2 were 3.0% and 2.1%, respectively. From this, it can be seen that the composition of the present invention has a higher effect of suppressing the line afterimage.
  • the voltage holding ratio of the composition of Comparative Example 2 was 75.4%.
  • the voltage holding ratio of the composition of Example 3 was 84.2%. The characteristic that the effect of suppressing the line afterimage is high and the characteristic that the voltage holding ratio is large are characteristics required for the use of the element for a long time. Therefore, it is concluded that the composition of the present invention has excellent properties.
  • the liquid crystal composition of the present invention can be used for a liquid crystal monitor, a liquid crystal television and the like.

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

L'invention a pour objet de fournir une composition de cristaux liquides qui satisfait au moins une des caractéristiques parmi des caractéristiques telles qu'une température limite supérieure élevée, une température limite inférieure basse, une viscosité faible, une anisotropie optique adéquate, une anisotropie de constante diélectrique négative importante, une résistance spécifique élevée, une stabilité élevée face aux rayons ultraviolets, une stabilité élevée face à la chaleur, ou similaire, ou qui présente un équilibre approprié concernant au moins deux de ces caractéristiques. En termes d'avantage, la composition de cristaux liquides de l'invention comprend, en tant que premier additif, un composé possédant une solubilité élevée par rapport à la composition de cristaux liquides, et présentant un effet inhibant les défauts d'affichage d'un élément d'affichage à cristaux liquides, et en tant que premier composant, un composé spécifique possédant une anisotropie de constante diélectrique négative importante, et possède une anisotropie de constante diélectrique négative. Enfin, cette composition peut comprendre, en tant que second composé, un composé spécifique possédant une température limite supérieure élevée ou une viscosité faible, et en tant que second additif, un composé spécifique possédant un groupe polymérisable.
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JP6489397B1 (ja) * 2017-06-23 2019-03-27 Dic株式会社 液晶組成物及びそれを使用した液晶表示素子
CN110872521A (zh) * 2018-08-30 2020-03-10 捷恩智株式会社 液晶组合物、液晶显示元件及用于液晶显示元件的用途
JP2020037671A (ja) * 2018-08-30 2020-03-12 Jnc株式会社 液晶組成物および液晶表示素子
JP2020041014A (ja) * 2018-09-06 2020-03-19 Jnc株式会社 液晶組成物および液晶表示素子
KR20200116037A (ko) * 2019-03-29 2020-10-08 스자좡 청즈 용화 디스플레이 메테리얼즈 씨오., 엘티디. 액정 조성물, 액정 디스플레이 소자, 액정 디스플레이 장치

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JP6489397B1 (ja) * 2017-06-23 2019-03-27 Dic株式会社 液晶組成物及びそれを使用した液晶表示素子
CN110872521A (zh) * 2018-08-30 2020-03-10 捷恩智株式会社 液晶组合物、液晶显示元件及用于液晶显示元件的用途
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CN110872521B (zh) * 2018-08-30 2023-09-26 捷恩智株式会社 液晶组合物、液晶显示元件及用于液晶显示元件的用途
TWI819069B (zh) * 2018-08-30 2023-10-21 日商捷恩智股份有限公司 液晶組成物、液晶顯示元件及用於液晶顯示元件的用途
JP2020041014A (ja) * 2018-09-06 2020-03-19 Jnc株式会社 液晶組成物および液晶表示素子
JP7268312B2 (ja) 2018-09-06 2023-05-08 Jnc株式会社 液晶組成物および液晶表示素子
KR20200116037A (ko) * 2019-03-29 2020-10-08 스자좡 청즈 용화 디스플레이 메테리얼즈 씨오., 엘티디. 액정 조성물, 액정 디스플레이 소자, 액정 디스플레이 장치
KR102346467B1 (ko) * 2019-03-29 2021-12-31 스자좡 청즈 용화 디스플레이 메테리얼즈 씨오., 엘티디. 액정 조성물, 액정 디스플레이 소자, 액정 디스플레이 장치

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