WO2017002790A1 - 液晶組成物及びこれを用いた液晶表示素子 - Google Patents
液晶組成物及びこれを用いた液晶表示素子 Download PDFInfo
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- WO2017002790A1 WO2017002790A1 PCT/JP2016/069096 JP2016069096W WO2017002790A1 WO 2017002790 A1 WO2017002790 A1 WO 2017002790A1 JP 2016069096 W JP2016069096 W JP 2016069096W WO 2017002790 A1 WO2017002790 A1 WO 2017002790A1
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- group
- liquid crystal
- ring
- independently
- diyl
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- 0 *C1CCC(*C=C)CC1 Chemical compound *C1CCC(*C=C)CC1 0.000 description 12
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- 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
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- 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
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- 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
- C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
- C09K19/16—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon double bonds, e.g. stilbenes
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- 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
- C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
- C09K19/18—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
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- 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
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
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- C09K19/00—Liquid crystal materials
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- 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
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
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- 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
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- 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)
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- 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
- C09K19/3059—Cyclohexane rings in which at least two rings are linked by a carbon chain containing carbon to carbon triple bonds
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
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- C09K19/00—Liquid crystal materials
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
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- C09K19/00—Liquid crystal materials
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- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/34—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring
- C09K19/3441—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom
- C09K19/345—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having nitrogen as hetero atom the heterocyclic ring being a six-membered aromatic ring containing two nitrogen atoms
- C09K19/3458—Uncondensed pyrimidines
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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
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- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133526—Lenses, e.g. microlenses or Fresnel lenses
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- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/13363—Birefringent elements, e.g. for optical compensation
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- 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
- C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
- C09K2019/123—Ph-Ph-Ph
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- 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
- C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
- C09K19/18—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
- C09K2019/181—Ph-C≡C-Ph
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- C09K19/00—Liquid crystal materials
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- 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
- C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
- C09K19/18—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain the chain containing carbon-to-carbon triple bonds, e.g. tolans
- C09K2019/183—Ph-Ph-C≡C-Ph
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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
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
- C09K2019/2035—Ph-COO-Ph
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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
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- C09K19/00—Liquid crystal materials
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- 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)
- C09K2019/301—Cy-Cy-Ph
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- 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)
- C09K2019/3025—Cy-Ph-Ph-Ph
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- 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)
- C09K2019/3027—Compounds comprising 1,4-cyclohexylene and 2,3-difluoro-1,4-phenylene
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- 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
- C09K19/3059—Cyclohexane rings in which at least two rings are linked by a carbon chain containing carbon to carbon triple bonds
- C09K2019/3063—Cy-Ph-C≡C-Ph
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- 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
- C09K2019/3078—Cy-Cy-COO-Ph-Cy
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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
- C09K19/3402—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom
- C09K2019/3422—Non-steroidal liquid crystal compounds containing at least one heterocyclic ring having oxygen as hetero atom the heterocyclic ring being a six-membered ring
Definitions
- the present invention relates to a composition having a positive dielectric anisotropy ( ⁇ ) useful as an organic electronic material, medical pesticide, particularly a liquid crystal material for electro-optical liquid crystal display and a liquid crystal material for liquid crystal lens, and a liquid crystal using the composition
- ⁇ a positive dielectric anisotropy
- the present invention relates to a display element.
- Liquid crystal display elements are used in various measuring instruments, automobile panels, word processors, electronic notebooks, printers, computers, televisions, watches, advertisement display boards, etc., including clocks and calculators.
- Typical liquid crystal display methods include TN (twisted nematic) type, STN (super twisted nematic) type, vertical alignment type using TFT (thin film transistor), and IPS (in-plane switching) type. Etc.
- TN twisted nematic
- STN super twisted nematic
- TFT thin film transistor
- IPS in-plane switching
- liquid crystal lens using birefringence of a liquid crystal material.
- Liquid crystal lenses are used as 2D and 3D switching lenses, lenses for adjusting the focus of cameras, and the like.
- All of these are encapsulated between glass and film substrates, and a voltage is applied to the liquid crystal composition subjected to the alignment treatment by the alignment film to cause alignment deformation of the liquid crystal composition, and the lens function is changed by changing the refractive index of the liquid crystal material. It is what you want to have.
- the substrate in which the liquid crystal material is encapsulated includes a general flat pair of substrates, and one substrate is processed into a lens shape.
- both of the pair of substrates are planar, by applying an electric field such that liquid crystal molecules sealed between the substrates are aligned in a lens shape by devising the electrode arrangement, the incident light passing through the substrate is not flat. It is refracted by the liquid crystal layer aligned in a lens shape (Patent Document 1).
- the left and right images can be visually recognized by the left and right eyes by using the refraction of light by the liquid crystal lens and binocular parallax, and can be recognized as a three-dimensional image. .
- Such a liquid crystal lens has no conventional lens liquid crystal composition because a desired lens effect can be obtained in a thin cell if the refractive index change accompanying the change in the orientation of the liquid crystal composition used in the liquid crystal lens is large.
- a high birefringence ( ⁇ n) is required.
- ⁇ n birefringence
- the liquid crystal composition exhibits a practical value for other physical property values such as a liquid crystal phase temperature range and a viscosity after setting ⁇ n as a required value. It is extremely difficult to develop.
- the problem to be solved by the present invention is to achieve a high ⁇ n, a liquid crystal phase in a wide temperature range, low viscosity, good solubility at low temperature, high specific resistance and high voltage holding ratio, A liquid crystal composition excellent in lens effect and chemical stability by using this, and a liquid crystal display element and a liquid crystal lens using the liquid crystal composition are provided. There is to do.
- the inventors of the present invention have studied the synthesis of various compounds, and as a result, found that the problems can be effectively solved by combining specific compounds, and have completed the present invention.
- the present invention has the general formula (i)
- R i1 represents an alkyl group having 1 to 12 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently —CH ⁇ CH—, — C ⁇ C—, —O—, —CO—, —COO— or OCO— may be substituted, and one or two or more hydrogen atoms present in R i1 are each independently fluorine.
- Y i1 represents a hydrogen atom, a fluorine atom, a chlorine atom, a cyano group or an alkyl group having 1 to 12 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently May be substituted by —CH ⁇ CH—, —C ⁇ C—, —O—, —CO—, —COO— or OCO—, and may be one or more present in Y i1
- Each hydrogen atom may be independently substituted with a fluorine atom
- X i1 to X i7 each independently represents a hydrogen atom or a fluorine atom, but X i1 and X i2 do not both represent a fluorine atom, and X i3 and X i4 both do not represent a fluorine atom, i5 and Xi6 do not both represent a fluorine atom
- a i1 is (
- the group (a), the group (b) and the group (c) may be independently substituted with a halogen atom or a cyano group
- Z i1 represents —OCH 2 —, —CH 2 O—, —C 2 H 4 —, —C 4 H 8 —, —COO—, —OCO—, —CH ⁇ CH—, —CF ⁇ CF—, —CF 2 O—, —OCF 2 —, —CF 2 CF 2 —, —C ⁇ C— or a single bond
- Z i2 represents a single bond or —C ⁇ C—
- m i1 represents 0 or 1;
- R ii1 and R ii2 each independently represents an alkyl group having 1 to 12 carbon atoms, and one or two or more non-adjacent —CH 2 — in the alkyl group are each independently Optionally substituted by —CH ⁇ CH— , —C ⁇ C— , —O—, —CO— , —COO— or OCO—, and one or two present in R ii1 and R ii2
- the above hydrogen atoms may be independently substituted with fluorine atoms, A ii1 and A ii2 each independently (a) 1,4-cyclohexylene group (this is present in the group one -CH 2 - or nonadjacent two or more -CH 2 - is -O - May be replaced with-).
- a 1,4-phenylene group (one —CH ⁇ present in the group or two or more non-adjacent —CH ⁇ may be replaced by —N ⁇ ) and (c) Naphthalene-2,6-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or decahydronaphthalene-2,6-diyl group (naphthalene-2,6-diyl group or 1,2 , 3,4-tetrahydronaphthalene-2,6-diyl group, one —CH ⁇ or two or more non-adjacent —CH ⁇ may be substituted with —N ⁇ .
- the group (a), the group (b) and the group (c) may be independently substituted with a halogen atom or a cyano group
- the liquid crystal composition containing the compounds represented by the general formulas (i) and (ii) provided by the present invention is stable against heat, light and the like, and can be easily produced industrially.
- ⁇ n is extremely large, has low viscosity, and exhibits a wide liquid crystal phase temperature range.
- one kind may be used, or two or more kinds may be used in combination.
- the lower limit value in the composition is 1% by mass (hereinafter,% in the composition is mass). % Is preferred), 2% is preferred, 5% is preferred, 7% is preferred, 9% is preferred, 10% is preferred, 12% is preferred, 15% is preferred, 17% is preferred, 20% Is preferred. Moreover, since it will cause problems, such as precipitation, if there is much content, as an upper limit, 50% is preferable, 40% is more preferable, 30% is more preferable, 25% is preferable, 20% is preferable, 18% is Preferably, 15% is preferable, 13% is preferable, and 10% is preferable.
- R i1 represents an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or alkenyloxy having 2 to 8 carbon atoms.
- a group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms or an alkenyloxy group having 2 to 5 carbon atoms is preferable.
- An alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferable, and an alkenyl group having 3 carbon atoms. (Propenyl group) is particularly preferred.
- R i1 is preferably an alkyl group, and when importance is placed on a decrease in viscosity, it is preferably an alkenyl group.
- the ring structure to which it is bonded is a phenyl group (aromatic)
- An alkenyl group having 4 to 5 atoms is preferable
- the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane
- a straight-chain alkoxy group having 1 to 4 carbon atoms and a straight-chain alkenyl group having 2 to 5 carbon atoms are preferred.
- the total of carbon atoms and oxygen atoms, if present is preferably 5 or less, and is preferably linear.
- the alkenyl group is preferably selected from groups represented by any of the formulas (R1) to (R5). (The black dots in each formula represent carbon atoms in the ring structure.)
- Y i1 is preferably a fluorine atom, a cyano group, a trifluoromethyl group or a trifluoromethoxy group when the compound represented by formula (i) is a so-called p-type compound having a positive ⁇ .
- An atom or a cyano group is preferred.
- Y i1 represents the same meaning as R i1 , but Y i1 and R i1 may be the same. , May be different.
- a i1 is preferably aromatic when it is required to increase ⁇ n, and is preferably aliphatic for improving the response speed, and each independently represents trans-1,4-cyclohexane.
- it represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group.
- Z i1 is preferably a single bond.
- Z i2 is preferably a single bond when importance is attached to the stability of the liquid crystal composition, and —C ⁇ C— is preferred when importance is attached to ⁇ n.
- m i1 is preferably 0 when emphasizing solubility in the liquid crystal composition, and 1 is preferred when emphasizing ⁇ n and Tni.
- X i1 to X i7 are all hydrogen atoms when the compound represented by the general formula (i) is a so-called nonpolar compound having ⁇ of almost 0, or one is a fluorine atom and the other is a hydrogen atom. It is preferable that
- the compound represented by the general formula (i) is preferably each compound represented by the following general formula (ia) to general formula (ig).
- R i1, X i2, X i4, X i6, X i7, A i1 and Y i1 are in the general formula (i) and R i1, X i2, X i4 , X i6, X i7 and Y i1 It represents the same meaning.) More preferable are the following compounds.
- one type may be used, or two or more types may be used in combination.
- the lower limit in the composition is 1% by mass (hereinafter,% in the composition is mass). % Is preferred), 2% is preferred, 5% is preferred, 7% is preferred, 9% is preferred, 10% is preferred, 12% is preferred, 15% is preferred, 17% is preferred, 20% Is preferred. Moreover, since it will cause problems, such as precipitation, if there is much content, as an upper limit, 50% is preferable, 40% is more preferable, 30% is more preferable, 25% is preferable, 20% is preferable, 18% is Preferably, 15% is preferable, 13% is preferable, and 10% is preferable.
- R ii1 and R ii2 are each independently an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or the number of carbon atoms
- An alkenyloxy group having 2 to 8 carbon atoms is preferable, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms
- An alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms is more preferable, and an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms is more preferable.
- an alkyl group is preferable, and in the case where importance is placed on a decrease in viscosity, an alkenyl group is preferable.
- the ring structure to which it is bonded is a phenyl group (aromatic)
- An alkenyl group having 4 to 5 atoms is preferable
- the ring structure to which the alkenyl group is bonded is a saturated ring structure such as cyclohexane, pyran and dioxane
- a straight-chain alkoxy group having 1 to 4 carbon atoms and a straight-chain alkenyl group having 2 to 5 carbon atoms are preferred.
- the total of carbon atoms and oxygen atoms, if present is preferably 5 or less, and is preferably linear.
- the alkenyl group is preferably selected from groups represented by any of the formulas (R1) to (R5). (The black dots in each formula represent carbon atoms in the ring structure.)
- a ii1 and A ii2 are preferably aromatic when it is required to independently increase ⁇ n, and are preferably aliphatic for improving the response speed, and are each independently trans.
- it represents a trans-1,4-cyclohexylene group or a 1,4-phenylene group.
- Z ii1 and Z ii2 are preferably each independently a single bond.
- m ii1 and m ii2 are preferably 0 or 1, and both m ii1 and m ii2 are preferably 0, m ii1 is 0, m ii2 is 1, m ii1 is 1, and m ii2 is 0.
- R ii1 , A i1 and Y ii1 represent the same meaning as R i1 , X i2 , X i4 , X i6 , X i7 and Y i1 in the general formula (i)). More preferable are the following compounds.
- the lower limit in the composition is 1% by mass (hereinafter referred to as composition) % In the product represents mass%.) Is preferred, 2% is preferred, 5% is preferred, 7% is preferred, 9% is preferred, 10% is preferred, 12% is preferred, 15% is preferred, 17 % Is preferable, and 20% is preferable.
- a compound having no liquid crystal phase can be added as necessary in order to adjust the physical property values of the liquid crystal composition.
- the general formula (A1) To (A3), (B1) to (B3), and (C1) to (C3) can be exemplified, and at least one of these compounds is preferably contained.
- the compounds represented by the general formulas (A1) to (A3) are so-called fluorine-based (halogen-based) p-type compounds.
- R b represents an alkyl group having 1 to 12 carbon atoms, which may be linear or have a methyl or ethyl branch, and has a 3- to 6-membered cyclic structure.
- Any —CH 2 — present in the group may be —O—, —CH ⁇ CH—, —CH ⁇ CF—, —CF ⁇ CH—, —CF ⁇ CF— or —C ⁇ C
- Any hydrogen atom present in the group may be substituted by a fluorine atom or a trifluoromethoxy group, a linear alkyl group having 1 to 7 carbon atoms, a carbon atom
- Alkyl groups are preferred. Further, when asymmetric carbon is generated by branching, the compound may be
- Ring A, Ring B and Ring C may each independently be substituted with a trans-1,4-cyclohexylene group, a transdecahydronaphthalene-trans-2,6-diyl group, or one or more fluorine atoms.
- the alkylene-2,6-diyl group or one to two fluorine atoms may be substituted 1,4-phenylene group is preferred.
- ring A when ring B is a trans-1,4-cyclohexylene group or a transdecahydronaphthalene-trans-2,6-diyl group, ring A may be a trans-1,4-cyclohexylene group.
- ring C when ring C is a trans-1,4-cyclohexylene group or a transdecahydronaphthalene-trans-2,6-diyl group, ring B and ring A are trans-1,4-cyclohexylene groups.
- ring A3 is preferably a trans-1,4-cyclohexylene group.
- L a , L b and L c are each a linking group and each independently represents a single bond, an ethylene group (—CH 2 CH 2 —), a 1,2-propylene group (—CH (CH 3 ) CH 2 — and —CH 2 CH (CH 3 ) —), 1,4-butylene group, —COO—, —OCO—, —OCF 2 —, —CF 2 O—, —CH ⁇ CH—, —CH ⁇ CF—, — CF ⁇ CH—, —CF ⁇ CF—, —C ⁇ C— or —CH ⁇ NN ⁇ CH—, each represents a single bond, ethylene group, 1,4-butylene group, —COO—, —OCF 2 —, —CF 2 O—, —CF ⁇ CF— or —C ⁇ C— is preferable, and a single bond or an ethylene group is particularly preferable. Further, it is preferable that at least one of (A2) represents a single bond and at least two of (A3) represent
- Ring Z is an aromatic ring and can be represented by the following general formulas (La) to (Lc).
- Y a to Y j each independently represent a hydrogen atom or a fluorine atom.
- at least one of Y a and Y b is preferably a fluorine atom
- at least one of Y d to Y f is preferably a fluorine atom
- Y d is more preferably a fluorine atom.
- Terminal group P a represents a fluorine atom, a chlorine atom, trifluoromethoxy group, difluoromethoxy group, trifluoromethyl group or difluoromethyl group or 2 or more carbon atoms substituted by fluorine atoms 2 or 3 of the alkoxyl group
- the lower limit of the preferable content of the compounds represented by the general formulas (A1) to (A3) with respect to the total amount of the composition of the present invention is 1%, 2%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
- the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
- the viscosity of the composition of the present invention is kept low and a composition having a high response speed is required, it is preferable to increase the upper limit value while increasing the lower limit value. Furthermore, when the composition of the present invention is required to maintain a high Tni and hardly burn-in, it is preferable to lower the lower limit and lower the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
- More preferable forms in the general formulas (A1) to (A3) can be represented by the following general formulas (A1a) to (A3c).
- A, B, C, Y a and Y b are A in the general formulas (A1) (A3), B , C, the same meaning as Y a and Y b) More preferably, they are the following compounds.
- the compounds represented by the general formulas (B1) to (B3) are so-called cyano p-type compounds.
- R c represents an alkyl group having 1 to 12 carbon atoms, which may be linear or have a methyl or ethyl branch and have a 3- to 6-membered cyclic structure.
- Any —CH 2 — present in the group may be —O—, —CH ⁇ CH—, —CH ⁇ CF—, —CF ⁇ CH—, —CF ⁇ CF— or —C ⁇ C
- Any hydrogen atom present in the group may be substituted by a fluorine atom or a trifluoromethoxy group, but a linear alkyl group having 1 to 7 carbon atoms, a carbon atom
- a linear 1-alkenyl group having 2 to 7 carbon atoms, a linear 3-alkenyl group having 4 to 7 carbon atoms, and a terminal group having 1 to 5 carbon atoms substituted with an alkoxyl group having 1 to 3 carbon atoms Alkyl groups are preferred. Further, when asymmetric carbon is generated by branching, the compound may be optically active or race
- Ring D, Ring E and Ring F may be each independently substituted with a trans-1,4-cyclohexylene group, a transdecahydronaphthalene-trans-2,6-diyl group, or one or more fluorine atoms.
- ring E is a trans-1,4-cyclohexylene group or a transdecahydronaphthalene-trans-2,6-diyl group
- ring D may be a trans-1,4-cyclohexylene group.
- Ring F is a trans-1,4-cyclohexylene group or a transdecahydronaphthalene-trans-2,6-diyl group
- Ring D and Ring E are trans-1,4-cyclohexylene groups.
- ring D is preferably a trans-1,4-cyclohexylene group.
- L d , L e and L f each independently represent a single bond, an ethylene group (—CH 2 CH 2 —), a 1,2-propylene group (—CH (CH 3 ) CH 2 — and ) —CH 2 CH (CH 3 ) —), 1,4-butylene group, —COO—, —OCO—, —OCF 2 —, —CF 2 O—, —CH ⁇ CH—, —CH ⁇ CF—, —CF ⁇ CH—, —CF ⁇ CF—, —C ⁇ C—, —OCH 2 —, —CH 2 O— or —CH ⁇ NN ⁇ CH— represents a single bond, an ethylene group, —COO—, —OCF 2 —, —CF 2 O—, —CF ⁇ CF— or —C ⁇ C— are preferred, and a single bond, an ethylene group or —COO— is particularly preferred. Further, it is preferable that at least one of them in (B2) represents a single bond in (B
- Ring Y is an aromatic ring and can be represented by the following general formulas (L d ) to (L f ).
- Y k to Y q each independently represents a hydrogen atom or a fluorine atom.
- Y m is preferably a fluorine atom.
- Terminal group P b is a cyano group (-CN), represents a cyanato group (-OCN) or -C ⁇ CCN, cyano group is preferable.
- the lower limit of the preferable content of the compounds represented by the general formulas (B1) to (B3) with respect to the total amount of the composition of the present invention is 1%, 2%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
- the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
- the viscosity of the composition of the present invention is kept low and a composition having a high response speed is required, it is preferable to lower the lower limit value and raise the upper limit value. Furthermore, when the composition of the present invention is required to maintain a high Tni and hardly cause seizure, it is preferable to lower the lower limit and increase the upper limit. Further, when it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to increase the upper limit value while increasing the lower limit value.
- More preferable forms in the general formulas (B1) to (B3) can be represented by the following general formulas (B1a) to (B2c).
- the compounds represented by the general formulas (C1) to (C3) are so-called nonpolar compounds having a dielectric anisotropy of about 0.
- R d and R e each independently represents an alkyl group having 1 to 12 carbon atoms, which may be linear or have a methyl or ethyl branch, and 3 to 6 Any —CH 2 — present in the group may be —O—, —CH ⁇ CH—, —CH ⁇ CF—, —CF ⁇ CH—, —CF ⁇ Any hydrogen atom present in the group may be replaced by CF- or -C ⁇ C-, and may be substituted by a fluorine atom or a trifluoromethoxy group.
- Ring G, Ring H, Ring I and Ring J are each independently a trans-1,4-cyclohexylene group, a transdecahydronaphthalene-trans-2,6-diyl group, 1 to 2 fluorine atoms or 1,4-phenylene group optionally substituted by a methyl group, naphthalene-2,6-diyl group optionally substituted by one or more fluorine atoms, substituted by 1 or 2 fluorine atoms
- L g , L h and Li are each a linking group and each independently represents a single bond, an ethylene group (—CH 2 CH 2 —), a 1,2-propylene group (—CH (CH 3 ) CH 2 — and ) —CH 2 CH (CH 3 ) —), 1,4-butylene group, —COO—, —OCO—, —OCF 2 —, —CF 2 O—, —CH ⁇ CH—, —CH ⁇ CF—, —CF ⁇ CH—, —CF ⁇ CF—, —C ⁇ C— or —CH ⁇ NN ⁇ CH—, each represents a single bond, ethylene group, 1,4-butylene group, —COO—, —OCO—, —OCF 2 —, —CF 2 O—, —CF ⁇ CF—, —C ⁇ C— or —CH ⁇ NN ⁇ CH— are preferred, and at least one of them in (C2) and that in (C3) It is preferable that at least two of them represent a single
- the lower limit of the preferable content of the compounds represented by the general formulas (C1) to (C3) with respect to the total amount of the composition of the present invention is 1%, 2%, 5%, 8 %, 10%, 13%, 15%, 18%, 20%, 22%, 25%, 30%.
- the upper limit of the preferred content is 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10% 8% and 5%.
- the viscosity of the composition of the present invention is kept low and a composition having a high response speed is required, it is preferable to lower the lower limit value and raise the upper limit value. Furthermore, when the composition of the present invention is required to maintain a high Tni and prevent the occurrence of seizure, it is preferable to increase the above lower limit value and the upper limit value. When it is desired to increase the dielectric anisotropy in order to keep the driving voltage low, it is preferable to lower the lower limit value and lower the upper limit value.
- More preferable forms in (C1) can be represented by the following general formulas (C1a) to (C1h).
- R f and R g are each independently a linear alkyl group having 1 to 7 carbon atoms, a linear 1-alkenyl group having 2 to 7 carbon atoms, or a group having 4 to 7 carbon atoms.
- at least one of them represents a linear alkyl group having 1 to 7 carbon atoms, a linear 1-alkenyl group having 2 to 7 carbon atoms, or a linear 3-alkenyl group having 4 to 7 carbon atoms.
- the corresponding R f excludes the 1-alkenyl group and alkoxyl group
- the corresponding R g is 1-alkenyl group and alkoxyl. Excluding groups.
- Ring G1 and Ring H1 are each independently substituted with a trans-1,4-cyclohexylene group, a transdecahydronaphthalene-trans-2,6-diyl group, 1 to 2 fluorine atoms or a methyl group.
- Ring G2 and Ring H2 are each independently substituted with a trans-1,4-cyclohexylene group, a transdecahydronaphthalene-trans-2,6-diyl group, 1 to 2 fluorine atoms or a methyl group.
- 1,4-phenylene group naphthalene-2,6-diyl group optionally substituted by one or more fluorine atoms, tetrahydronaphthalene-2 optionally substituted by 1 to 2 fluorine atoms, Represents a 6-diyl group, but in each compound, a transdecahydronaphthalene-trans-2,6-diyl group, a naphthalene-2,6-diyl group optionally substituted by one or more fluorine atoms, 1 to
- the number of tetrahydronaphthalene-2,6-diyl groups which may be substituted by two fluorine atoms is preferably 1 or less.
- the other ring is a trans-1,4-cyclohexylene group or a 1,4-phenylene group optionally substituted by 1 to 2 fluorine atoms or a methyl group.
- Ring G3 and Ring H3 are each independently a 1,4-phenylene group optionally substituted by 1 to 2 fluorine atoms or a methyl group, and naphthalene-2 optionally substituted by one or more fluorine atoms , 6-diyl group, tetrahydronaphthalene-2,6-diyl group optionally substituted by 1 or 2 fluorine atoms, naphthalene optionally substituted by one or more fluorine atoms in each compound
- the number of the -2,6-diyl group and the number of tetrahydronaphthalene-2,6-diyl group which may be substituted by 1 or 2 fluorine atoms is preferably 1 or less.
- More preferable forms in (C2) can be represented by the following general formulas (C2a) to (C2m).
- ring G1, ring G2, ring G3, ring H1, ring H2, and ring H3 have the same meanings as described above, ring I1 is the same as ring G1, ring I2 is the same as ring G2, and ring I3 is the same as ring G3. Represents meaning.
- the number of pyrimidine-2,5-diyl groups or pyridine-2,5-diyl groups is preferably one or less, and the other ring in this case is a trans-1,4-cyclohexylene group or 1 to 2 groups.
- ring G1, ring G2, ring H1, ring H2, ring I1 and ring I2 represent the above-mentioned meanings
- ring J1 represents the same meaning as ring G1 or ring J2, respectively.
- a transdecahydronaphthalene-trans-2,6-diyl group, a naphthalene-2,6-diyl group optionally substituted by one or more fluorine atoms, and 1 to 2 fluorine atoms A tetrahydronaphthalene-2,6-diyl group optionally substituted by 1, a 1,4-cyclohexenylene group optionally substituted by a fluorine atom, a 1,3-dioxane-trans-2,5-diyl group
- the number of pyrimidine-2,5-diyl groups or pyridine-2,5-diyl groups is preferably one or less, and the other ring in this case is
- composition of the present invention preferably does not contain a compound having a structure in which heteroatoms such as oxygen atoms such as a peracid (—CO—OO—) structure are bonded in the molecule.
- the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less with respect to the total mass of the composition. Preferably, it is more preferably 1% or less, and most preferably not substantially contained.
- the content of the compound substituted with chlorine atoms is preferably 15% or less, preferably 10% or less, based on the total mass of the composition. % Or less, preferably 5% or less, more preferably 3% or less, and still more preferably substantially not contained.
- the content of a compound in which all the ring structures in the molecule are 6-membered rings is 80% relative to the total mass of the composition. % Or more, more preferably 90% or more, still more preferably 95% or more, and the composition is composed only of a compound in which all of the ring structures in the molecule are all 6-membered rings. Most preferably.
- the content of the compound having a cyclohexenylene group as a ring structure, and the content of the compound having a cyclohexenylene group as the total mass of the composition is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, and still more preferably not contained.
- the content of a compound having a 2-methylbenzene-1,4-diyl group in the molecule, in which a hydrogen atom may be substituted with a halogen may be reduced.
- the content of the compound having a 2-methylbenzene-1,4-diyl group in the molecule is preferably 10% or less, more preferably 8% or less, based on the total mass of the composition. It is more preferably 5% or less, further preferably 3% or less, and still more preferably substantially not contained.
- substantially not contained in the present application means that it is not contained except for an unintentionally contained product.
- the alkenyl group when the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, when the alkenyl group is bonded to cyclohexane, the alkenyl group has 2 to 5 carbon atoms.
- the alkenyl group is bonded to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, and the unsaturated bond of the alkenyl group and benzene are directly bonded. Preferably not.
- an antioxidant In order to increase the stability of the liquid crystal composition in the present invention, it is preferable to add an antioxidant.
- the antioxidant include hydroquinone derivatives, nitrosamine polymerization inhibitors, hindered phenol antioxidants, and more specifically, tert-butyl hydroquinone, methyl hydroquinone, manufactured by Wako Pure Chemical Industries, Ltd.
- IRGANOX1010 “IRGANOX1035”, “IRGANOX1076”, “IRGANOX1098”, “IRGANOX1135”, “IRGANOX1330”, “IRGANOX1425”, “IRGANOX1520”, “IRGANOX1726”, BASF Corporation “IRGANOX245”, “IRGANOX259”, “IRGANOX3114”, “IRGANOX3790”, “IRGANOX5057”, “IRGANOX565”, etc. Is given.
- the addition amount of the antioxidant is preferably 0.01 to 2.0% by mass and more preferably 0.05 to 1.0% by mass with respect to the polymerizable liquid crystal composition.
- a UV absorber In order to enhance the stability of the liquid crystal composition in the present invention, it is preferable to add a UV absorber.
- a UV absorber those having excellent absorption ability of ultraviolet rays having a wavelength of 370 nm or less and little absorption of visible light having a wavelength of 400 nm or more are preferable from the viewpoint of good liquid crystal display properties.
- hindered phenol compounds hydroxybenzophenone compounds, benzotriazole compounds, salicylic acid ester compounds, benzophenone compounds, cyanoacrylate compounds, nickel complex compounds, triazine compounds, and hinders
- dephenol-based compounds include 2,6-di-tert-butyl-p-cresol, pentaerythrityl-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexamethylenebis (3,5-di-tert-butyl-4-hydroxy-hydrocinnamide), 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl- 4-hydroxybenzyl) benzene, tris- (3,5-di-) ert- butyl-4-hydroxybenzyl) - isocyanurate.
- benzotriazole compounds include 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2,2-methylenebis (4- (1,1,3,3-tetramethylbutyl) -6- (2H -Benzotriazol-2-yl) phenol), (2,4-bis- (n-octylthio) -6- (4-hydroxy-3,5-di-tert-butylanilino) -1,3,5-triazine, Triethylene glycol-bis [3- (3-tert-butyl-5-methyl-4-hydroxyphenyl) propionate], N, N′-hexamethylenebis (3,5-di-tert-butyl-4-hydroxy- Hydrocinnamide), 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene, (2′-hydroxy-3 ′, 5′-di-tert-butylphenyl) -5-chlorobenzotri
- the measured characteristics are as follows.
- T NI Nematic phase-isotropic liquid phase transition temperature
- T ⁇ N Phase transition temperature to become a nematic phase
- ⁇ n Refractive index anisotropy at 298K no:
- ⁇ Dielectric anisotropy at 298K
- Vth Voltage in which liquid crystal is sealed in a TN cell having a thickness of 8.5 microns, and the transmittance changes by 10% under a 298K crossed Nicol polarizing plate.
- VHR Voltage holding ratio (%) at 333 K under conditions of frequency 60 Hz and applied voltage 5 V
- VHR TEG (test element group) for evaluation of electro-optical properties in which a composition sample was sealed was held in a thermostatic bath at 130 ° C. for 1 hour, and then measured under the same conditions as in the VHR measurement method described above.
- the liquid crystal composition was vacuum-injected into a liquid crystal cell for TN (cell gap 8.3 ⁇ m) and sealed with a UV curable resin (Three Bond 3026) to prepare a liquid crystal cell.
- initial The sample whose current value was measured immediately after the liquid crystal cell was created was taken as an initial sample (hereinafter abbreviated as initial).
- UV UV irradiation sample
- heating A sample obtained by heating the liquid crystal cell at 80 ° C. for 350 hours using an oven was used as a heated sample (hereinafter abbreviated as heating).
- the current value was calculated by At this time, three liquid crystal cells were prepared under each condition, the current values were measured, and the current values obtained from the three cells were averaged to obtain a current value. did.
- Burn-in The burn-in evaluation of the liquid crystal display element is performed until the afterimage of the fixed pattern reaches an unacceptable afterimage level when displaying the predetermined fixed pattern in the display area for an arbitrary test time and then displaying the entire screen uniformly.
- the test time was measured. 1) The test time referred to here indicates the display time of the fixed pattern, and the longer this time is, the more the afterimage is suppressed and the higher the performance. 2)
- the unacceptable afterimage level is a level at which an afterimage that is rejected in the shipment acceptance / rejection determination is observed.
- Sample A 1000 hours
- Sample B 500 hours
- Sample C 200 hours
- Sample D 100 hours Performance is A>B>C> D.
- Drop marks The evaluation of the drop marks of the liquid crystal display device was performed by visual observation of the drop marks that appeared white when the entire surface was displayed in black by the following five-step evaluation.
- Process suitability is determined by dropping a liquid crystal 50pL at a time, "0 to 100 times, 101 to 200 times, 201 to 300 times, " 100 times at a time using a constant volume metering pump in the ODF process. The mass of the liquid crystal for each 100 drops was measured and evaluated by the number of drops at which the mass variation reached a size that could not be adapted to the ODF process.
- Low temperature storage For storage stability evaluation at low temperature, after preparing the composition, 0.5 g of the composition was weighed into a 1 mL sample bottle and stored in a temperature controlled test tank at -25 ° C. for 240 hours. Generation
- Examples 1 to 4 and Comparative Examples 1 to 2 A liquid crystal composition of the present invention and a liquid crystal display device using the composition were prepared and measured for physical properties.
- composition of Comparative Example 1 that does not contain the compound represented by the formula (i) has a slightly lower ⁇ n value than the composition of Example 1, but the Vth value is increased. all right.
- composition of Comparative Example 2 that does not contain the compound represented by the general formula (ii) can have substantially the same ⁇ n and Vth value as compared with the composition of Example 1, but T ⁇ N was found to be significantly worse.
- liquid crystal composition of the present invention has extremely excellent characteristics.
- Examples 5 to 8 Liquid crystal lenses were prepared using the liquid crystal compositions shown as Examples 1 to 4, and it was confirmed that excellent lens characteristics were exhibited.
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Abstract
Description
Yi1は水素原子、フッ素原子、塩素原子、シアノ基又は炭素原子数1~12のアルキル基を表し、該アルキル基中の1個又は非隣接の2個以上の-CH2-はそれぞれ独立して-CH=CH-、-C≡C-、-O-、-CO-、-COO-又はOCO-によって置換されていてもよく、また、Yi1中に存在する1個又は2個以上の水素原子はそれぞれ独立してフッ素原子に置換されていてもよく、
Xi1~Xi7はそれぞれ独立して水素原子又はフッ素原子を表すが、Xi1とXi2がともにフッ素原子を表すことはなく、Xi3とXi4がともにフッ素原子を表すことはなく、Xi5とXi6がともにフッ素原子を表すことはなく、
Ai1は
(a) 1,4-シクロヘキシレン基(この基中に存在する1個の-CH2-又は隣接していない2個以上の-CH2-は-O-に置き換えられてもよい。)、
(b) 1,4-フェニレン基(この基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置き換えられてもよい。)及び
(c) ナフタレン-2,6-ジイル基、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基又はデカヒドロナフタレン-2,6-ジイル基(ナフタレン-2,6-ジイル基又は1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置換されていてもよい。)
からなる群より選ばれる基を表し、上記の基(a)、基(b)及び基(c)はそれぞれ独立してハロゲン原子又はシアノ基で置換されていてもよく、
Zi1は-OCH2-、-CH2O-、-C2H4-、-C4H8-、-COO-、-OCO-、-CH=CH-、-CF=CF-、-CF2O-、-OCF2-、-CF2CF2-、-C≡C-又は単結合を表し、
Zi2は単結合又は-C≡C-を表し、
mi1は0又は1を表す。)
で表される化合物を1種又は2種以上と、
一般式(ii)
Aii1及びAii2はそれぞれ独立して
(a) 1,4-シクロヘキシレン基(この基中に存在する1個の-CH2-又は隣接していない2個以上の-CH2-は-O-に置き換えられてもよい。)、
(b) 1,4-フェニレン基(この基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置き換えられてもよい。)及び
(c) ナフタレン-2,6-ジイル基、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基又はデカヒドロナフタレン-2,6-ジイル基(ナフタレン-2,6-ジイル基又は1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置換されていてもよい。)
からなる群より選ばれる基を表し、上記の基(a)、基(b)及び基(c)はそれぞれ独立してハロゲン原子又はシアノ基で置換されていてもよく、
Zii1及びZii2はそれぞれ独立して単結合、-OCH2-、-CH2O-、-C2H4-、-C4H8-、-COO-、-OCO-、-CH=CH-、-CF=CF-、-CF2O-、-OCF2-、-CF2CF2-又は-C≡C-を表し、
mii1及びmii2はそれぞれ独立しては0、1又は2を表すが、mii1+mii2は0、1又は2を表し、mii1が2であってAii1が複数存在する場合は、それらは同一であっても異なっていてもよく、mii1が2であってZii1が複数存在する場合は、それらは同一であっても異なっていてもよく、mii2が2であってAii2が複数存在する場合は、それらは同一であっても異なっていてもよく、mii2が2であってZii2が複数存在する場合は、それらは同一であっても異なっていてもよい。)
で表される化合物を1種又は2種以上含有する液晶組成物、当該液晶組成物を用いた液晶表示素子、当該液晶組成物を用いた液晶レンズ及び当該液晶組成物を用いた立体画像表示用複屈折レンズを提供する。
さらに好ましくは下記の化合物である。
さらに好ましくは下記の化合物である。
La、Lb及びLcは連結基であって、それぞれ独立的に単結合、エチレン基(-CH2CH2-)、1,2-プロピレン基(-CH(CH3)CH2-及び-CH2CH(CH3)-)、1,4-ブチレン基、-COO-、-OCO-、-OCF2-、-CF2O-、-CH=CH-、-CH=CF-、-CF=CH-、-CF=CF-、-C≡C-又は-CH=NN=CH-を表すが、単結合、エチレン基、1,4-ブチレン基、-COO-、-OCF2-、-CF2O-、-CF=CF-又は-C≡C-が好ましく、単結合又はエチレン基が特に好ましい。また、(A2)においてはその少なくとも1個が、(A3)においてはその少なくとも2個が単結合を表すことが好ましい。
さらに好ましくは、下記化合物である。
さらに好ましくは、下記化合物である。
T→N :ネマチック相となる相転移温度
Δn :298Kにおける屈折率異方性
no :
Δε :298Kにおける誘電率異方性
ε⊥ :
γ1 :298Kにおける回転粘度
Vth :厚さ8.5ミクロンのTNセルに液晶を封入し、298K、クロスニコル偏光板下において透過率が10%変化する電圧。
耐熱試験後VHR:組成物サンプルを封入した電気光学特性評価用TEG(テスト・エレメント・グループ)を130℃の恒温槽中に1時間保持した後、上述のVHR測定方法と同条件で測定した。
液晶組成物を、TN用液晶セル(セルギャップ8.3μm)に真空注入し、UV硬化性樹脂(スリーボンド社製、Three Bond 3026)で封止し、液晶セルを作製した。
液晶表示素子の焼き付き評価は、表示エリア内に所定の固定パターンを任意の試験時間表示させた後に、全画面均一な表示を行ったときの固定パターンの残像が、許容できない残像レベルに達するまでの試験時間を計測した。
1)ここで言う試験時間とは固定パターンの表示時間を示し、この時間が長いほど残像の発生が抑制されており、性能が高いことを示している。
2)許容できない残像レベルとは、出荷合否判定で不合格となる残像が観察されるレベルである。
例)
サンプルA:1000時間
サンプルB:500時間
サンプルC:200時間
サンプルD:100時間
性能は、A>B>C>Dである。
液晶表示装置の滴下痕の評価は、全面黒表示した場合における白く浮かび上がる滴下痕を目視にて以下の5段階評価で行った。
4:滴下痕ごく僅かに有るも許容できるレベル(良)
3:滴下痕僅かに有り、合否判定のボーダーラインレベル(条件付で可)
2:滴下痕有り許容できないレベル(不可)
1:滴下痕有りかなり劣悪(悪)
プロセス適合性 :
プロセス適合性は、ODFプロセスにおいて、定積計量ポンプを用いて、液晶を1回に50pLずつ「0~100回、101~200回、201~300回、・・・・」と100回ずつ滴下したときの各100回滴下分の液晶の質量を計測し、質量のバラつきがODFプロセスに適合できない大きさに達した滴下回数で評価した。
滴下回数が多いほど長時間にわたって安定的に滴下可能であり、プロセス適合性が高いといえる。
例)
サンプルA:95000回
サンプルB:40000回
サンプルC:100000回
サンプルD:10000回
性能は、C>A>B>Dである。
低温での保存性評価は、組成物を調製後、1mLのサンプル瓶に組成物を0.5g秤量し、これを-25℃の温度制御式試験槽の中で240時間保存して目視にて組成物からの析出物の発生を観察し、析出物が観察されたときの試験時間を計測した。析出発生までの試験時間が長いほど低温での保存性が良好であるといえる。
液晶材料の揮発性評価は、真空攪拌脱泡ミキサーの運転状態をストロボスコープを用いて観察し、液晶材料の発泡を目視により観察することによって行った。具体的には、容量2.0Lの真空攪拌脱泡ミキサーの専用容器に組成物を0.8kg入れ、4kPaの脱気下、公転速度15S-1、自転速度7.5S-1で真空攪拌脱泡ミキサーを運転し、発泡が始まるまでの時間を計測した。
発泡が始まるまでの時間が長いほど揮発しにくく、製造装置を汚染する可能性が低いので、高性能であることを示す。
例)
サンプルA:200秒
サンプルB:45秒
サンプルC:60秒
サンプルD:15秒
性能は、A>C>B>Dである。
尚、実施例において化合物の記載について以下の略号を用いる。
(環構造)
(側鎖構造及び連結構造)
本願発明の液晶組成物及び該組成物を使用した液晶表示素子を作製し、その物性値を測定した。
ほぼ同程度とできたが、T→Nが大幅に悪化していることがわかった。
実施例1~4として示した液晶組成物を使用して液晶レンズを作成し、優れたレンズ特性を示すことが確認できた。
Claims (15)
- 一般式(i)
Yi1は水素原子、フッ素原子、塩素原子、シアノ基又は炭素原子数1~12のアルキル基を表し、該アルキル基中の1個又は非隣接の2個以上の-CH2-はそれぞれ独立して-CH=CH-、-C≡C-、-O-、-CO-、-COO-又はOCO-によって置換されていてもよく、また、Yi1中に存在する1個又は2個以上の水素原子はそれぞれ独立してフッ素原子に置換されていてもよく、
Xi1~Xi7はそれぞれ独立して水素原子又はフッ素原子を表すが、Xi1とXi2がともにフッ素原子を表すことはなく、Xi3とXi4がともにフッ素原子を表すことはなく、Xi5とXi6がともにフッ素原子を表すことはなく、
Ai1は
(a) 1,4-シクロヘキシレン基(この基中に存在する1個の-CH2-又は隣接していない2個以上の-CH2-は-O-に置き換えられてもよい。)、
(b) 1,4-フェニレン基(この基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置き換えられてもよい。)及び
(c) ナフタレン-2,6-ジイル基、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基又はデカヒドロナフタレン-2,6-ジイル基(ナフタレン-2,6-ジイル基又は1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置換されていてもよい。)
からなる群より選ばれる基を表し、上記の基(a)、基(b)及び基(c)はそれぞれ独立してハロゲン原子又はシアノ基で置換されていてもよく、
Zi1は-OCH2-、-CH2O-、-C2H4-、-C4H8-、-COO-、-OCO-、-CH=CH-、-CF=CF-、-CF2O-、-OCF2-、-CF2CF2-、-C≡C-又は単結合を表し、
Zi2は単結合又は-C≡C-を表し、
mi1は0又は1を表す。)
で表される化合物を1種又は2種以上と、
一般式(ii)
Aii1及びAii2はそれぞれ独立して
(a) 1,4-シクロヘキシレン基(この基中に存在する1個の-CH2-又は隣接していない2個以上の-CH2-は-O-に置き換えられてもよい。)、
(b) 1,4-フェニレン基(この基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置き換えられてもよい。)及び
(c) ナフタレン-2,6-ジイル基、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基又はデカヒドロナフタレン-2,6-ジイル基(ナフタレン-2,6-ジイル基又は1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基中に存在する1個の-CH=又は隣接していない2個以上の-CH=は-N=に置換されていてもよい。)
からなる群より選ばれる基を表し、上記の基(a)、基(b)及び基(c)はそれぞれ独立してハロゲン原子又はシアノ基で置換されていてもよく、
Zii1及びZii2はそれぞれ独立して単結合、-OCH2-、-CH2O-、-C2H4-、-C4H8-、-COO-、-OCO-、-CH=CH-、-CF=CF-、-CF2O-、-OCF2-、-CF2CF2-又は-C≡C-を表し、
mii1及びmii2はそれぞれ独立しては0、1又は2を表すが、mii1+mii2は0、1又は2を表し、mii1が2であってAii1が複数存在する場合は、それらは同一であっても異なっていてもよく、mii1が2であってZii1が複数存在する場合は、それらは同一であっても異なっていてもよく、mii2が2であってAii2が複数存在する場合は、それらは同一であっても異なっていてもよく、mii2が2であってZii2が複数存在する場合は、それらは同一であっても異なっていてもよい。)
で表される化合物を1種又は2種以上含有する液晶組成物。 - 一般式(i)において、Yi1がフッ素原子、塩素原子、シアノ基、トリフルオロメチル基、フルオロメトキシ基、ジフルオロメトキシ基、トリフルオロメトキシ基又は2,2,2-トリフルオロエチル基である請求項1に記載の液晶組成物。
- 一般式(i)において、Xi1~Xi7のいずれか一つがフッ素原子である請求項1又は2に記載の液晶組成物。
- 一般式(i)において、Zi2が単結合であり、Xi4がフッ素原子であり、且つYi1がシアノ基である請求項1から3のいずれか一項に記載の液晶組成物。
- 一般式(i)においてZi2が-C≡C-である請求項1から3のいずれか一項に記載の液晶組成物。
- 一般式(ii)において、Aii1及びAii2がトランス-1,4-シクロへキシレン基である請求項1から5のいずれか一項に記載の液晶組成物。
- 一般式(ii)において、mii1が0又は1であり、mii2が0である請求項1から6のいずれか一項に記載の液晶組成物。
- 更に、一般式(A1)から(A3)
環A、環B及び環Cはそれぞれ独立的にトランス-1,4-シクロへキシレン基、トランスデカヒドロナフタレン-トランス-2,6-ジイル基、1個以上のフッ素原子により置換されていてもよい1,4-フェニレン基、1個以上のフッ素原子により置換されていてもよいナフタレン-2,6-ジイル基、1個以上のフッ素原子により置換されていてもよいテトラヒドロナフタレン-2,6-ジイル基、フッ素原子により置換されていてもよい1,4-シクロヘキセニレン基、1,3-ジオキサン-トランス-2,5-ジイル基、ピリミジン-2,5-ジイル基またはピリジン-2,5-ジイル基を表し、
La、Lb及びLcはそれぞれ独立的に単結合、エチレン基(-CH2CH2-)、1,2-プロピレン基(-CH(CH3)CH2-及び-CH2CH(CH3)-)、1,4-ブチレン基、-COO-、-OCO-、-OCF2-、-CF2O-、-CH=CH-、-CH=CF-、-CF=CH-、-CF=CF-、-C≡C-又は-CH=NN=CH-を表し、
環Zは一般式(La)~(Lc)で表される置換基を表し、
Paはフッ素原子、塩素原子、トリフルオロメトキシ基、ジフルオロメトキシ基、トリフルオロメチル基又はジフルオロメチル基あるいは2個以上のフッ素原子により置換された炭素原子数2又は3のアルコキシル基、アルキル基、アルケニル基又はアルケニルオキシ基を表し、
一般式(A1)から(A3)で表される化合物を組み合わせて使用する場合、異なる分子中の同一の選択肢(環AやLa等)は同一の置換基を表しても、異なる置換基を表してもよい。
なお、一般式(A1)から(A3)においては本発明の一般式(i)及び(ii)を除く。)
で表される化合物を1種又は2種以上含有する請求項1から7のいずれか一項に記載の液晶組成物。 - 更に、一般式(B1)から(B3)
環D、環E及び環Fはそれぞれ独立的にトランス-1,4-シクロへキシレン基、トランスデカヒドロナフタレン-トランス-2,6-ジイル基、1個以上のフッ素原子により置換されていてもよい1,4-フェニレン基、1個以上のフッ素原子により置換されていてもよいナフタレン-2,6-ジイル基、1個以上のフッ素原子により置換されていてもよいテトラヒドロナフタレン-2,6-ジイル基、フッ素原子により置換されていてもよい1,4-シクロヘキセニレン基、1,3-ジオキサン-トランス-2,5-ジイル基、ピリミジン-2,5-ジイル基又はピリジン-2,5-ジイル基を表し、
Ld、Le及びLfはそれぞれ独立的に単結合、エチレン基(-CH2CH2-)、1,2-プロピレン基(-CH(CH3)CH2-及び)-CH2CH(CH3)-)、1,4-ブチレン基、-COO-、-OCO-、-OCF2-、-CF2O-、-CH=CH-、-CH=CF-、-CF=CH-、-CF=CF-、-C≡C-、-OCH2-、-CH2O-又は-CH=NN=CH-を表し、
環Yは芳香環であり以下の一般式(Ld)~(Lf)で表される置換基を表し、
末端基Pbはシアノ基(-CN)、シアナト基(-OCN)又は-C≡CCNを表し、
一般式(B1)から(B3)で表される化合物を組み合わせて使用する場合、異なる分子中の同一の選択肢(環DやLd等)は同一の置換基を表しても、異なる置換基を表してもよく、
一般式(B1)から(B3)においては本発明の一般式(i)及び(ii)を除く。)
で表される化合物を1種又は2種以上含有する請求項1から8のいずれか一項に記載の液晶組成物。 - 更に、一般式(C1)から(C3)
環G、環H、環I及び環Jはそれぞれ独立的に、トランス-1,4-シクロへキシレン基、トランスデカヒドロナフタレン-トランス-2,6-ジイル基、1~2個のフッ素原子あるいはメチル基により置換されていてもよい1,4-フェニレン基、1個以上のフッ素原子により置換されていてもよいナフタレン-2,6-ジイル基、1~2個のフッ素原子により置換されていてもよいテトラヒドロナフタレン-2,6-ジイル基、1~2個のフッ素原子により置換されていてもよい1,4-シクロヘキセニレン基、1,3-ジオキサン-トランス-2,5-ジイル基、ピリミジン-2,5-ジイル基又はピリジン-2,5-ジイル基を表し、
Lg、Lh及びLiはそれぞれ独立的に単結合、エチレン基(-CH2CH2-)、1,2-プロピレン基(-CH(CH3)CH2-及び)-CH2CH(CH3)-)、1,4-ブチレン基、-COO-、-OCO-、-OCF2-、-CF2O-、-CH=CH-、-CH=CF-、-CF=CH-、-CF=CF-、-C≡C-又は-CH=NN=CH-を表し、
なお一般式(C1)から(C3)で表される化合物を組み合わせて使用する場合、異なる分子中の同一の選択肢(環GやLg等)は同一の置換基を表しても、異なる置換基を表してもよく、
一般式(C1)から(C3)においては本発明の一般式(A1)から(A3)、(B1)から(B3)、(i)及び(ii)を除く。)
で表される化合物を1種又は2種以上含有する請求項1から9のいずれか一項に記載の液晶組成物。 - 屈折率異方性が0.15以上である請求項1から10のいずれか1項に記載の液晶組成物。
- 酸化防止剤、紫外線防止剤、カイラル剤、帯電防止剤及び二色性色素の少なくともいずれか1つを1種又は2種以上含有する請求項1から11のいずれか1項に記載の液晶組成物。
- 請求項1から12のいずれか1項に記載の液晶組成物を用いた液晶表示素子。
- 請求項1から12のいずれか1項に記載の液晶組成物を用いた液晶レンズ。
- 請求項1から12のいずれか1項に記載の液晶組成物を用いた立体画像表示用複屈折レンズ。
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