WO2015034018A1 - ネマチック液晶組成物及びこれを用いた液晶表示素子 - Google Patents
ネマチック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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- WO2015034018A1 WO2015034018A1 PCT/JP2014/073384 JP2014073384W WO2015034018A1 WO 2015034018 A1 WO2015034018 A1 WO 2015034018A1 JP 2014073384 W JP2014073384 W JP 2014073384W WO 2015034018 A1 WO2015034018 A1 WO 2015034018A1
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- PNPSEDPZIUBVEM-UHFFFAOYSA-N CCC/[O]=C(/C(C(F)(F)F)=C)\OC Chemical compound CCC/[O]=C(/C(C(F)(F)F)=C)\OC PNPSEDPZIUBVEM-UHFFFAOYSA-N 0.000 description 1
- SEEYREPSKCQBBF-UHFFFAOYSA-N CN(C(C=C1)=O)C1=O Chemical compound CN(C(C=C1)=O)C1=O SEEYREPSKCQBBF-UHFFFAOYSA-N 0.000 description 1
- JUBOISWHAUYTDY-UHFFFAOYSA-N COCC1CC2OC2CC1 Chemical compound COCC1CC2OC2CC1 JUBOISWHAUYTDY-UHFFFAOYSA-N 0.000 description 1
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- 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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- C07C69/88—Esters of carboxylic acids having a carboxyl group bound to a carbon atom of a six-membered aromatic ring of monocyclic hydroxy carboxylic acids, the hydroxy groups and the carboxyl groups of which are bound to carbon atoms of a six-membered aromatic ring with esterified carboxyl groups
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- C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
- C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D213/78—Carbon atoms having three bonds to hetero atoms, with at the most one bond to halogen, e.g. ester or nitrile radicals
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- C07D305/04—Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms not condensed with other rings having no double bonds between ring members or between ring members and non-ring members
- C07D305/06—Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms not condensed with other rings having no double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring atoms
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- 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
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- 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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- C09K2019/0407—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit the structure containing one or more specific, optionally substituted ring or ring systems containing a carbocyclic ring, e.g. dicyano-benzene, chlorofluoro-benzene or cyclohexanone
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- C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
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- 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-)
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- C09K19/3001—Cyclohexane rings
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Definitions
- the present invention relates to a nematic liquid crystal composition having a negative dielectric anisotropy ( ⁇ ) useful as a liquid crystal display material, and a liquid crystal display device using the same.
- Liquid crystal display elements are used in clocks, calculators, various household electrical devices, measuring devices, automotive panels, word processors, electronic notebooks, printers, computers, televisions, and the like.
- Typical liquid crystal display methods include TN (twisted nematic), STN (super twisted nematic), DS (dynamic light scattering), GH (guest / host), and IPS (in-plane switching).
- Type OCB (optical compensation birefringence) type, ECB (voltage controlled birefringence) type, VA (vertical alignment) type, CSH (color super homeotropic) type, FLC (ferroelectric liquid crystal), etc.
- Examples of the driving method include static driving, multiplex driving, simple matrix method, active matrix (AM) method driven by TFT (thin film transistor), TFD (thin film diode), and the like.
- the IPS type, ECB type, VA type, CSH type, and the like have a feature that a liquid crystal material having a negative value of ⁇ is used.
- the VA type display method by AM driving is used for a display element that requires a high speed and a wide viewing angle, such as a television.
- a nematic liquid crystal composition used for a display method such as a VA type is required to have a low voltage drive, a high-speed response, and a wide operating temperature range. That is, ⁇ is negative, the absolute value is large, the viscosity is low, and a high nematic phase-isotropic liquid phase transition temperature (T ni ) is required. Further, from the setting of ⁇ n ⁇ d, which is the product of refractive index anisotropy ( ⁇ n) and cell gap (d), it is necessary to adjust ⁇ n of the liquid crystal material to an appropriate range according to the cell gap. In addition, when applying a liquid crystal display element to a television or the like, since high-speed response is important, a liquid crystal material having a low viscosity ( ⁇ ) is required.
- a liquid crystal composition using the following compounds (A) and (B) having a 2,3-difluorophenylene skeleton (see Patent Document 1) as a liquid crystal material having a negative ⁇ is disclosed.
- This liquid crystal composition uses the compounds (C) and (D) as compounds having ⁇ of almost 0, but this liquid crystal composition is sufficient for a liquid crystal composition that requires a high-speed response such as a liquid crystal television. Has not yet achieved a low viscosity.
- liquid crystal composition using a compound represented by the formula (G) has been disclosed (see Patent Document 4), but this liquid crystal composition also includes an alkenyl compound like the above compound (F). Therefore, there is a problem that display defects such as image sticking and display unevenness are likely to occur.
- Patent Documents 6 and 7 have already disclosed liquid crystal compositions using a compound having a fluorine-substituted terphenyl structure.
- Patent Document 8 discloses that the response speed of a homeotropic liquid crystal cell is improved by using a liquid crystal material having a large index (FoM) represented by (Equation 1), which is described in the specification. The improvement in the response speed of the liquid crystal composition used has not been sufficient.
- JP-A-8-104869 European Patent Application No. 0474402 JP 2006-37054 A JP 2001-354967 A JP 2008-144135 A WO2007 / 077872 JP 2003-327965 A JP 2006-301643 A
- the problem to be solved by the present invention is that the solid phase-nematic phase transition temperature (T cn ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ).
- T cn solid phase-nematic phase transition temperature
- T ni nematic phase-isotropic liquid phase transition temperature
- the present inventor has studied various compounds having a difluorobenzene skeleton, and found that the above problems can be solved by combining specific compounds, and has completed the present invention.
- R 11 and R 12 represent an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, and —CH 2 — in the group or two not adjacent to each other
- the above —CH 2 — may be independently substituted with —O— or —S—, and one or more hydrogen atoms present in the group are each independently a fluorine atom or chlorine. May be substituted with atoms,
- L 11 represents —OCH 2 —, —CH 2 O—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 — or a single bond, and a plurality of L 11 are present.
- Ring A1 represents a 1,4-phenylene group
- each ring B1 independently represents a trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3- Fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [ 2.2.2] Octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2 , 6-diyl group, and when there are a plurality of rings B1, they may be the same or different, and ring B1 is an alkyl group having 1 to 12 carbon atoms or
- the liquid crystal composition containing 1 type, or 2 or more types of compounds represented by this is provided, and the liquid crystal display element using the same is also provided.
- the liquid crystal composition of the present invention has a sufficient solid phase-nematic phase transition temperature (T cn ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ).
- the liquid crystal composition of the present invention is particularly effective for a liquid crystal display device having a thin cell thickness that requires high ⁇ n.
- the liquid crystal composition of the present invention has the formula (I)
- R 11 and R 12 represent an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, and —CH 2 — in the group or two or more —CH 2 not adjacent to each other - May be each independently substituted with -O- or -S-, and one or more hydrogen atoms present in the group are each independently substituted with a fluorine atom or a chlorine atom.
- R 11 is preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyl group having 2 to 8 carbon atoms, and an alkyl group having 1 to 5 carbon atoms or An alkenyl group having 2 to 5 carbon atoms is more preferable, and R 12 is 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 2 carbon atoms.
- an oxy group is preferred, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms is more preferred, and an alkoxy group having 1 to 5 carbon atoms, Alternatively, an alkenyloxy group having 2 to 5 carbon atoms is more preferable.
- R 11 and R 12 represent an alkenyl group
- examples of the alkenyl group include the following formulas (Alkenyl-1) to (Alkenyl-4)
- L 11 represents —OCH 2 —, —CH 2 O—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 — or a single bond, but —CH 2 CH 2 -Or a single bond is preferable, and a single bond is more preferable. Further, when a plurality of L 11 are present, they may be the same or different.
- n 11 represents 0, 1 or 2, with 0 or 1 being preferred.
- Ring A1 represents a 1,4-phenylene group.
- Ring B1 is trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1 , 4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, piperidine-1,4-diyl Group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, but trans-1,4-cyclo Hexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, and 2,3-d
- Trang 1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group and 3-fluoro-1,4-phenylene group are more preferable, and trans-1,4 More preferred are -cyclohexylene group and 1,4-phenylene group.
- rings B1 When a plurality of rings B1 are present, they may be the same or different.
- Ring B1 is unsubstituted or an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, Optionally substituted with halogen, cyano group or nitro group, but unsubstituted or alkyl group having 1 to 12 carbon atoms, halogenated alkyl group having 1 to 12 carbon atoms, alkoxy group having 1 to 12 carbon atoms A halogenated alkoxy group having 1 to 12 carbon atoms, preferably substituted with halogen, unsubstituted or an alkyl group having 1 to 12 carbon atoms, a halogenated alkyl group having 1 to 12 carbon atoms, halogen More preferably, it is more preferably substituted with an unsubstituted or halogen.
- one or more compounds represented by the formula (I) are contained, and the content thereof is 1 to 100% by mass, preferably 2 to 80% by mass, and 3 to 50% by mass. % Is more preferable, and 3 to 30% by mass is particularly preferable.
- the content of the compound represented by formula (I) in which R 11 or R 12 is an alkenyl group or an alkenyloxy group is an alkenyl group or an alkenyloxy group.
- the lower limit is preferably 2% by mass, more preferably 5% by mass, more preferably 10% by mass, and more preferably 15% by mass.
- the content of the compound represented by formula (I) in which R 11 or R 12 is an alkenyl group or an alkenyloxy group may be reduced.
- the upper limit is preferably 15% by mass, more preferably 10% by mass, and still more preferably 5% by mass or less.
- the compound represented by the general formula (I) includes, for example, the general formulas (IA), (IB), (IC), (ID), (IE), (IF) ) Or (IG), and the compounds represented by the general formulas (IA), (IB) and (IC) are preferred, and the compounds represented by the general formula (IB) ) And (IC) are more preferred, and compounds represented by the general formula (IB) are more preferred.
- R 11 and R 12 are as described above.
- the liquid crystal composition of the present invention is a non-polar compound having a dielectric anisotropy ( ⁇ ) value of approximately 0, from the compounds represented by general formula (IV-1) to general formula (IV-3). It is preferable to contain a selected compound.
- the compound selected from the group of compounds represented by general formula (IV-1) to general formula (IV-3) is preferably contained in one or more kinds, preferably 1 to 10 kinds, preferably 1 to Five are more preferable. Further, the total content is preferably 5 to 70% by mass, more preferably 5 to 50% by mass, and particularly preferably 5 to 40% by mass.
- R 5 is an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms
- R 6 is an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, carbon
- An alkenyl group having 2 to 5 atoms or an alkenyloxy group having 2 to 5 carbon atoms is represented.
- One —CH 2 — present in the group or two or more non-adjacent —CH 2 — may be each independently substituted with —O— or —S—, and may be present in the group.
- R 5 is an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 4 carbon atoms.
- R 6 is preferably an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, or an alkenyl group having 2 to 4 carbon atoms, and an alkyl group having 1 to 5 carbon atoms. More preferably, it is an alkenyl group having 2 to 4 carbon atoms.
- the compound represented by the general formula (IV-1) is contained in the compound group represented by the general formula (IV-1) to the general formula (IV-3).
- the content of the compound represented by the general formula (IV-1) is preferably 5 to 50% by mass, and more preferably 10 to 40% by mass.
- the liquid crystal composition of the present invention includes other properties such as a nematic phase-isotropic liquid phase transition temperature without affecting ⁇ by including a dielectrically nearly neutral compound in the liquid crystal composition. (T NI ), liquid crystal phase temperature range, phase transition temperature viscosity ( ⁇ ), rotational viscosity ( ⁇ 1 ), and refractive index anisotropy ( ⁇ n) can be adjusted to preferable ranges.
- T NI liquid crystal phase temperature range
- phase transition temperature viscosity ( ⁇ ) can be adjusted to preferable ranges.
- R p and R q each independently represent an alkyl group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms, and one —CH 2 — or adjacent group present in these groups. Or two or more —CH 2 — substituted with —O— or —S—, and one or more hydrogen atoms present in these groups are substituted with fluorine atoms or chlorine atoms. Or 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 an alkenyloxy group having 2 to 8 carbon atoms.
- 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 3 to 6 carbon atoms.
- carbon Alkyl group or an alkoxy group or an alkenyl group having a carbon number of 2 to 4 from 1 to 5 carbon atoms, 5 from the child number 1 is particularly preferred. More preferably, it is linear.
- R p and R q represent an alkenyl group
- examples of the alkenyl group include the following formulas (Alkenyl-1) to (Alkenyl-4)
- Ring J, Ring F and Ring K are independently of each other; Ring J, Ring F and Ring K are each independently a trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1, 4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] Octylene group, piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group Represented by trans-1,4-cyclohexylene group, 1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 1,4-cyclohexeni Len group,
- Z 11 and Z 12 each independently represent —OCH 2 —, —CH 2 O—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 — or a single bond.
- the general formula (N3) is preferably a compound represented by the following general formula (N3-1) to general formula (N3-9) as a specific structure.
- R p and R q are as described above.
- the compound represented by the general formula (N-3) is preferably contained in 1 to 10 types, more preferably 2 to 8 types, and the general formula (N—
- the content of the compound represented by 3) is preferably 0 to 70% by mass, more preferably 0 to 60% by mass, and particularly preferably 5 to 50% by mass.
- the liquid crystal composition of the present invention can contain a compound having a negative ⁇ and an absolute value larger than 3. Specifically, it is preferably a compound represented by the general formula (II). However, the compound represented by the formula (II) does not include the compound represented by the formula (I).
- R 21 and R 22 represent an alkyl group having 1 to 8 carbon atoms or an alkenyl group having 2 to 8 carbon atoms, and —CH 2 — in the group or not adjacent 2
- Two or more —CH 2 — may be independently substituted with —O— or —S—, and one or more hydrogen atoms present in the group are each independently a fluorine atom or a chlorine atom. May be substituted, but a straight chain is preferable, and unsubstituted is preferable.
- R 21 and R 22 are each independently an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or a group having 2 to 5 carbon atoms. More preferably, it is an alkenyloxy group.
- R 21 and R 22 represent an alkenyl group
- examples of the alkenyl group include the following formulas (Alkenyl-1) to (Alkenyl-4)
- L 21 and L 22 represent —OCH 2 —, —CH 2 O—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 — or a single bond, 2 O -, - it is preferable to represent a CF 2 O-or a single bond, more preferably represents -CH 2 O-or a single bond.
- L 11 and L 22 may be the same or different.
- n 21 and n 21 each independently represent 0, 1 or 2.
- m 21 + n 21 represents 1, 2 or 3, and is preferably 1 or 2.
- Ring A2 and Ring B2 are each independently a trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,4-phenylene group, 2,3-difluoro-1,4-phenylene group, 1,4-cyclohexenylene group, 1,4-bicyclo [2.2.2] octylene group, Represents a piperidine-1,4-diyl group, naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group or 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, Trans-1,4-cyclohexylene group, 1,4-phenylene group, 2-fluoro-1,4-phenylene group, 3-fluoro-1,4-phenylene group, 3,5-difluoro-1,
- Ring A2 and ring B2 are each independently an alkyl group having 1 to 12 carbon atoms, or a group having 1 to 12 carbon atoms. It may be substituted with a halogenated alkyl group, an alkoxy group having 1 to 12 carbon atoms, a halogenated alkoxy group having 1 to 12 carbon atoms, a halogen, a cyano group or a nitro group. It is preferably substituted with an alkyl group of ⁇ 12, an alkoxy group of 1 to 12 carbon atoms or halogen.
- Specific examples of the compound represented by the general formula (II) include those represented by the general formula (II-A1) to the general formula (II-A5) and the general formula (II-B1) to the general formula (II-B5).
- compounds of general formula (II-A1) to general formula (II-A5) are more preferable, and compounds of general formula (II-A1) or general formula (II-A3) are preferred. It is particularly preferred that
- each of R 3 and R 4 independently represents an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and one —CH 2 — or adjacent group present in the group Two or more —CH 2 — that are not present may be independently substituted with —O— or —S—.
- one or two or more hydrogen atoms present in the group may be independently substituted with fluorine atoms.
- the compound represented by general formula (II) is a compound represented by general formula (V). In this case, it is preferable to contain one or more compounds represented by the general formula (V), and the content is preferably 2 to 30% by mass, more preferably 2 to 25% by mass, and 3 to 20 Mass% is particularly preferred.
- each of R 51 and R 52 independently represents an alkyl group having 1 to 8 carbon atoms, an alkoxyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkyl group having 2 to 8 carbon atoms.
- alkenyloxy group represents alkenyloxy group, one -CH 2 present in the radical - or nonadjacent two or more -CH 2 - may be substituted each independently -O- or -S-,
- one or two or more hydrogen atoms present in the group may be each independently substituted with a fluorine atom, but 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 1 to 3 carbon atoms is more preferable.
- the compound represented by the general formula (V) is also preferably a compound of the formula (V-55).
- the liquid crystal composition preferably further contains one or more compounds represented by the general formula (Np-1) or the general formula (Np-2).
- R Np1 and R Np2 each independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkyl group having 2 to 5 carbon atoms. Although it represents an alkenyloxy group, it is preferably an alkyl group having 1 to 5 carbon atoms.
- one of the -CH 2 that is present in the radical - or nonadjacent two or more -CH 2 - may be substituted each independently -O- or -S-, also, in the radical
- One or two or more hydrogen atoms present in may be each independently substituted with a fluorine atom.
- X Np1 , X Np2 , X Np3 , X Np4 and X Np5 each independently represent a hydrogen atom or a fluorine atom, but preferably at least one is a fluorine atom, and at least two are fluorine atoms. Further preferred.
- the total content of the compounds represented by general formula (V), general formula (Np-1) and general formula (Np-2) is preferably 80% by mass or more, and 85% by mass or more.
- the liquid crystal composition of the present invention has a dielectric anisotropy ( ⁇ ) at ⁇ 25 ° C. of ⁇ 2.0 to ⁇ 8.0, preferably ⁇ 2.0 to ⁇ 6.0, -5.0 is more preferable, and -2.0 to -4.0 is particularly preferable.
- the liquid crystal composition of the present invention has a refractive index anisotropy ( ⁇ n) at 20 ° C. of 0.08 to 0.14, more preferably 0.09 to 0.13, and 0.09 to 0.12. Particularly preferred. More specifically, it is preferably 0.10 to 0.13 when dealing with a thin cell gap, and preferably 0.08 to 0.10 when dealing with a thick cell gap.
- the liquid crystal composition of the present invention has a viscosity ( ⁇ ) at 20 ° C. of 5 to 30 mPa ⁇ s, more preferably 10 to 25 mPa ⁇ s, and particularly preferably 10 to 22 mPa ⁇ s.
- the liquid crystal composition of the present invention has a rotational viscosity ( ⁇ 1 ) at 20 ° C. of 50 to 150 mPa ⁇ s, more preferably 60 to 120 mPa ⁇ s, and particularly preferably 60 to 100 mPa ⁇ s. .
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ) of 60 ° C. to 120 ° C., more preferably 70 ° C. to 100 ° C., and particularly preferably 70 ° C. to 85 ° C.
- T ni nematic phase-isotropic liquid phase transition temperature
- the liquid crystal composition of the present invention may contain a normal nematic liquid crystal, a smectic liquid crystal, a cholesteric liquid crystal, an antioxidant, an ultraviolet absorber and the like in addition to the above-described compounds.
- the liquid crystal composition of the present invention can also contain a polymerizable compound. Thereby, it can be used as a liquid crystal composition for PSA mode, PSVA mode, PS mode and the like.
- the polymerizable compound is preferably contained in an amount of 0.01 to 2% by mass. More specifically, the liquid crystal composition of the present invention preferably contains one or more polymerizable compounds represented by the general formula (RM-1).
- Z M1 and Z M2 are each independently
- X M1 to X M5 represent hydrogen, fluorine or
- S M1 represents an alkyl group having 1 to 12 carbon atoms or a single bond, and the methylene group in the alkyl group is an oxygen atom, —COO—, —OCO—, or — It may be replaced with OCOO-.
- R M1 represents the following formulas (R-1) to (R-15)
- M M1 present represents a 1,4-phenylene group, a 1,4-cyclohexylene group, a naphthalene-2,6-diyl group, and a hydrogen atom contained in these groups is a fluorine atom, a chlorine atom, or a carbon atom.
- M M1 when there are a plurality of M M1, they may be the same or different, but are preferably 1,4-phenylene groups which are unsubstituted or in these groups Are preferably substituted with a fluorine atom, an alkyl group having 1 to 8 carbon atoms or an alkoxy group. In that case, when there are a plurality of M M1 , they may be the same or different.
- m M1 represents 0, 1 or 2, with 0 or 1 being preferred. More specifically, examples of the compound represented by the general formula (RM-1) which is a polymerizable compound include compounds represented by the following general formula (RM-1A).
- R M1 and S M1 of the general formula (RM-1) represents the same meaning as R M1 and S M1 in, X M1 ⁇ X M8 is hydrogen, fluorine or,
- the structure of the biphenyl skeleton is preferably unsubstituted or represented by the formula (IV-11) to the formula (IV-14). (IV-11) is preferred.
- liquid crystal display device such as a PSA mode, a PSVA mode, and a PS mode
- a liquid crystal display device such as a PSA mode, a PSVA mode, and a PS mode
- the orientation regulating force is optimal, and a good orientation state can be obtained.
- examples of the compound represented by the general formula (RM-1) include a compound represented by the general formula (RM-1B).
- R M1, S M1, L M1 , L M2, M M1 and m M1 includes a general formula (RM-1) in R M1, S M1, L M1 , L M2, M M1 and m M1 X M1 to X M5 represent the same meaning, hydrogen, fluorine or
- RM-1 polymerizable compound represented by the general formula (RM-1)
- M1-13 polymerizable compound represented by the general formula (RM-1)
- M2-1 polymerizable compound represented by the general formula (M2-8)
- M4-1) to (M4-7) Compounds represented by (M4-1) to (M4-7) and (I-1) to (I-40) are preferred.
- (M1-1) to (M1-8) (M1-10) to (M1-13), (M2-2) to (M2-5), (M3-1), (M3-4), ( M3-5), (M4-1), (M4-2), (M4-4), (M4-6), (M4-7), (I-1) to (I-11), (I ⁇ 22) to (I-25) and (I-28) to (I-40) are preferred,
- the compounds represented by (M3-1), (M3-5), (M4-2), (M4-6), (M4-7) and (I-33) to (I-37) are preferred.
- the polymerizable compound-containing liquid crystal composition containing the compound represented by the general formula (I) and the compound represented by the general formula (RM-1), which is a polymerizable compound has a low viscosity ( ⁇ ) and a low rotational viscosity. Since ( ⁇ 1 ), a large elastic constant (K 33 ), and a high VHR can be obtained, a PSA mode or PSVA mode liquid crystal display device using the same can be realized at the same time because both high-speed response and high reliability can be realized. It is more preferable that the compound represented by the general formula (I), the compound represented by the general formula (N-3) and the general formula (RM-1) which is a polymerizable compound are simultaneously contained.
- the general formula (I), the general formula (N -3), represented by general formula (II) It is further preferable to simultaneously contain a compound selected from the group consisting of general formulas (IV-1) to (IV-3) and a general formula (RM-1) which is a polymerizable compound.
- a compound represented by general formula (N-3), general formula (II), compound represented by general formula (V), a compound selected from the group consisting of general formulas (IV-1) to (IV-3), and a polymerizable compound It is further preferable to simultaneously contain the general formula (RM-1), and the general formula (I), general formula (N-3), general formula (II), general formula (Np-1), (Np-2) And a compound selected from the group consisting of general formulas (IV-1) to (IV-3) and a general formula (RM-1) which is a polymerizable compound are more preferable.
- Formula (I), Formula (N-3), Formula (II), Formula (V), One A compound represented by general formula (Np-1), (Np-2), a compound selected from the group consisting of general formulas (IV-1) to (IV-3), and a general formula (RM-) which is a polymerizable compound It is further preferable to contain 1) simultaneously.
- the liquid crystal display device using the liquid crystal composition of the present invention has a remarkable feature of high-speed response, and is particularly useful for a liquid crystal display device for active matrix driving, and includes VA mode, PSVA mode, PSA mode, IPS. Applicable for mode or ECB mode.
- the measured characteristics are as follows.
- T ni Nematic phase-isotropic liquid phase transition temperature (° C.)
- T cn Solid phase-nematic phase transition temperature (° C)
- ⁇ n Refractive index anisotropy at 20 ° C.
- ⁇ Dielectric anisotropy at 20 ° C.
- Viscosity at 20 ° C. (mPa ⁇ s) ⁇ 1 rotational viscosity at 20 ° C. (mPa ⁇ s) K 33 : Elastic constant at 20 ° C.
- Pretilt angle before polymerization Pretilt angle (°) before UV irradiation
- Pretilt angle after polymerization Pretilt angle after UV irradiation (°)
- UV was irradiated at 60 J (365 nm) while applying a 10 V, 100 Hz, rectangular wave voltage to the test cell. USHIO multi-light was used as the UV light source.
- the cell thickness is 3.5 ⁇ m
- the alignment film is a test cell of JALS2096
- Vsel is 5 V
- Vnsel 1 V
- the measurement temperature is 20 ° C. Using.
- LC-A (Comparative Example 1), LC-1 (Example 1), LC-2 (Example 2), LC-3 (Example 3), LC-4 (Example 4), LC-5 (Example) Liquid crystal compositions of Example 5) and LC-6 (Example 6) were prepared and their physical properties were measured.
- the composition of the liquid crystal composition and the results of its physical properties are shown in Table 1.
- the liquid crystal compositions LC-1, LC-2, LC-3, LC-4, LC-5 and LC-6 of the present invention have a small viscosity ( ⁇ ), a small rotational viscosity ( ⁇ 1 ), and an elastic constant ( K 33 ) was large, and ⁇ 1 / K 33 was smaller than that of LC-A as a comparative example.
- the liquid crystal composition of the present invention has a sufficiently small viscosity ( ⁇ ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ). Since the liquid crystal display element using VA type or the like has a negative dielectric anisotropy ( ⁇ ) having a sufficiently small rotational viscosity ( ⁇ 1), a large elastic constant (K 33 ), and a large absolute value, It was confirmed that the display quality was excellent and the response speed was fast.
- liquid crystal compositions MLC-1-1 to 4 and MLC-2 to 6 of the present invention were given appropriate pretilt angles by UV irradiation as in the case of MLC-A.
- MLC-1-1 to 4 and MLC-2 to 6 had sufficiently high-speed responses, and were 5% or more faster than MLC-A.
- the liquid crystal composition of the present invention has a sufficiently small viscosity ( ⁇ ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ).
- the liquid crystal compositions LC-7 and LC-8 of the present invention have small viscosity ( ⁇ ), small rotational viscosity ( ⁇ 1 ), large elastic constant (K 33 ), and ⁇ 1 / K 33 in the comparative example. The value was smaller than that of some LC-B.
- the liquid crystal composition of the present invention has a sufficiently small viscosity ( ⁇ ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ). Since the liquid crystal display element using VA type or the like has a negative dielectric anisotropy ( ⁇ ) having a sufficiently small rotational viscosity ( ⁇ 1), a large elastic constant (K 33 ), and a large absolute value, It was confirmed that the display quality was excellent and the response speed was fast.
- liquid crystal compositions MLC-7 and MLC-8 of the present invention were given an appropriate pretilt angle by UV irradiation as in the case of MLC-B.
- MLC-7 and MLC-8 were sufficiently high-speed responses, and were 8% or more faster than MLC-B. From the above, the liquid crystal composition of the present invention has a sufficiently small viscosity ( ⁇ ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ).
- the liquid crystal compositions LC-9, LC-10 and LC-11 of the present invention have a small viscosity ( ⁇ ), a small rotational viscosity ( ⁇ 1 ), a large elastic constant (K 33 ), and a ⁇ 1 / K 33 of The value was smaller than that of the comparative example LC-C.
- the liquid crystal composition of the present invention has a sufficiently small viscosity ( ⁇ ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ). Since the liquid crystal display element using VA type or the like has a negative dielectric anisotropy ( ⁇ ) having a sufficiently small rotational viscosity ( ⁇ 1), a large elastic constant (K 33 ), and a large absolute value, It was confirmed that the display quality was excellent and the response speed was fast.
- the liquid crystal compositions MLC-9-1, MLC-9-2, MLC-9-3, MLC-10, and MLC-11 of the present invention are given an appropriate pretilt angle by UV irradiation as in MLC-C. It was. When the response speed of the liquid crystal display device using these was measured, MLC-9-1, MLC-9-2, MLC-9-3, MLC-10 and MLC-11 had sufficiently high response, and MLC- It was 3% faster than B. From the above, the liquid crystal composition of the present invention has a sufficiently small viscosity ( ⁇ ) without lowering the refractive index anisotropy ( ⁇ n) and the nematic phase-isotropic liquid phase transition temperature (T ni ).
- the rotational viscosity ( ⁇ 1) is sufficiently small, the elastic constant (K 33 ) is large, and the absolute value has a large negative dielectric anisotropy ( ⁇ ), the VA type, PSA type, and PSVA type using the same It was confirmed that the liquid crystal display elements such as those with excellent display quality and quick response speed.
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Abstract
Description
また、式(A)及び式(G)にΔεがほぼゼロである式(III-F31)を組み合わせた液晶組成物(特許文献6参照)が開示されている。しかし、液晶表示素子の製造工程では液晶組成物を液晶セルに注入する際の極低圧で、蒸気圧が低い化合物は揮発してしまうため、その含有量を増やすことが出来ないと考えられていた。このため、該液晶組成物は式(III-F31)の含有量を限定してしまっており、大きなΔnを示すものの、粘度が著しく高いという問題があった。
また、特許文献8において、(式1)で示される指数(FoM)が大きい液晶材料を使用することでホメオトロピック液晶セルの応答速度を向上させることが開示されているが、明細書中に記載されている液晶組成物の応答速度の改善は十分とは言えるものではなかった。
L11は-OCH2-、-CH2O-、-CF2O-、-OCF2-、-CH2CH2-、-CF2CF2-又は単結合を表し、L11が複数存在する場合はそれらは同一でも異なっていてもよく、
m11は0、1又は2を表し、
環A1は1,4-フェニレン基を表し、環B1はそれぞれ独立的にトランス-1,4-シクロへキシレン基、1,4-フェニレン基、2-フルオロ-1,4-フェニレン基、3-フルオロ-1,4-フェニレン基、3,5-ジフルオロ-1,4-フェニレン基、2,3-ジフルオロ-1,4-フェニレン基、1,4-シクロヘキセニレン基、1,4-ビシクロ[2.2.2]オクチレン基、ピペリジン-1,4-ジイル基、ナフタレン-2,6-ジイル基、デカヒドロナフタレン-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-ジイル基を表すが、環B1が複数存在する場合はそれらは同一でも異なっていてもよく、環B1は炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲン、シアノ基又はニトロ基で置換されていても良い。)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を提供し、また、これを用いた液晶表示素子を提供する。
R11およびR12がアルケニル基を表す場合アルケニル基としては次に記載する式(Alkenyl-1)~式(Alkenyl-4)
で表される置換基が好ましい。L11は-OCH2-、-CH2O-、-CF2O-、-OCF2-、-CH2CH2-、-CF2CF2-又は単結合を表すが、-CH2CH2-又は単結合であることが好ましく、単結合であることがより好ましい。
また、L11が複数存在する場合はそれらは同一でも異なっていてもよい。
環B1が複数存在する場合はそれらは同一でも異なっていてもよい。
環B1は無置換か炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲン、シアノ基又はニトロ基で置換されていてもよいが、無置換か炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲンで置換されていていることが好ましく、無置換か炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、ハロゲンで置換されていていることがより好ましく、無置換かハロゲンで置換されていていることが更に好ましい。
本発明では式(I)で表される化合物を1種又は2種以上含有し、その含有量は1から100質量%であるが、2から80質量%であることが好ましく、3から50質量%であることが更に好ましく、3から30質量%であることが特に好ましい。
本発明の液晶組成物は、誘電的にほぼ中性の化合物を液晶組成物に含むことにより、Δεに影響を及ぼすことなく、その他の諸物性、例えば、ネマチック相-等方性液体相転移温度(TNI)、液晶相温度範囲、相転移温度粘度(η)、回転粘度(γ1)、屈折率異方性(Δn)を好ましい範囲に調整することができる。そのような化合物としては例えば下記一般式(N3)で表される化合物を含有することが好ましい。
で表される構造が好ましい。
R21およびR22がアルケニル基を表す場合、アルケニル基としては次に記載する式(Alkenyl-1)~式(Alkenyl-4)
で表される構造が好ましい。
環A2及び/又は環B2が複数存在する場合はそれらは同一でも異なっていてもよく、環A2及び環B2はそれぞれ独立して炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲン、シアノ基又はニトロ基で置換されていても良いが、無置換か炭素原子数1~12のアルキル基、炭素原子数1~12のアルコキシ基又はハロゲンで置換されていることが好ましい。
一般式(II)で表される化合物が、一般式(V)で表される化合物であることも好ましい。この場合、一般式(V)で表される化合物を1種又は2種以上含有することが好ましく、その含有量は2から30質量%が好ましく、2から25質量%が更に好ましく、3から20質量%が特に好ましい。
一般式(RM-1A)で表される化合物において、上記のビフェニル骨格の構造は、無置換であるか式(IV-11)から式(IV-14)であることが好ましく、無置換または式(IV-11)であることが好ましい。
重合性化合物である一般式(RM-1)で表される化合物として、具体的に以下の構造式(M1-1)~(M1-13)、(M2-1)~(M2-8)、(M3-1)~(M3-6)、(M4-1)~(M4-7)および(I-1)~(I-40)で表される化合物が好ましい。
特に、(M1-1)、(M1-3)、(M1-6)~(M1-8)、(M1-11)、(M1-12)、(M2-2)、(M2-4)、(M3-1)、(M3-5)、(M4-2)、(M4-6)、(M4-7)および(I-33)~(I-37)で表される化合物が好ましい。
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。
(側鎖)
-n -CnH2n+1 炭素原子数nの直鎖状のアルキル基
n- CnH2n+1- 炭素原子数nの直鎖状のアルキル基
-On -OCnH2n+1 炭素原子数nの直鎖状のアルコキシル基
nO- CnH2n+1O- 炭素原子数nの直鎖状のアルコキシル基
-V -CH=CH2
V- CH2=CH-
-V1 -CH=CH-CH3
1V- CH3-CH=CH-
-2V -CH2-CH2-CH=CH3
V2- CH3=CH-CH2-CH2-
-2V1 -CH2-CH2-CH=CH-CH3
1V2- CH3-CH=CH-CH2-CH2
(環構造)
Tcn :固体相-ネマチック相転移温度(℃)
Δn :20℃における屈折率異方性
Δε :20℃における誘電率異方性
η :20℃における粘度(mPa・s)
γ1 :20℃における回転粘性(mPa・s)
K33 :20℃における弾性定数K33(pN)
重合前プレチルト角 :UVを照射する前のプレチルト角(°)
重合後プレチルト角 :UVを照射した後のプレチルト角(°)
テストセルにプレチルト角形成させる場合は、テストセルに10V、100Hz、矩形波電圧を印加しながら、UVを60J(365nm)照射した。UV光源としてUSHIO社のマルチライトを使用した。
試料の応答速度を測定する場合は、セル厚は3.5μm、配向膜はJALS2096のテストセルを使用し、Vselは5V、Vnselは1V、測定温度は20℃で、AUTRONIC-MELCHERS社のDMS301を用いた。
(比較例1、実施例1~6)
LC-A(比較例1)、LC-1(実施例1)、LC-2(実施例2)、LC-3(実施例3)、LC-4(実施例4)、LC-5(実施例5)及びLC-6(実施例6)の液晶組成物を調製し、その物性値を測定した。液晶組成物の構成とその物性値の結果は表1のとおりであった。
以上のことから、本発明の液晶組成物は、屈折率異方性(Δn)及びネマチック相-等方性液体相転移温度(Tni)を低下させることなく、粘度(η)が十分に小さく、回転粘性(γ1)が十分に小さく、弾性定数(K33)が大きく、絶対値が大きな負の誘電率異方性(Δε)を有するため、これを用いたVA型等の液晶表示素子は表示品位の優れた応答速度の速いものであることが確認された。
(比較例2、実施例7~15)
MLC-A(比較例2)、MLC-1-1(実施例7)、MLC-1-2(実施例8)、MLC-1-3(実施例9)、MLC-1-4(実施例10)、MLC-2(実施例11)、MLC-3(実施例12)、MLC-4(実施例13)、MLC-5(実施例14)及びMLC-6(実施例15)の液晶組成物を調製し、テストセルに真空注入したのち、そのUV照射前後のプレチルト角を測定した。液晶組成物の構成とそのプレチルト角の測定結果は表2のとおりであった。
以上のことから、本発明の液晶組成物は、屈折率異方性(Δn)及びネマチック相-等方性液体相転移温度(Tni)を低下させることなく、粘度(η)が十分に小さく、回転粘性(γ1)が十分に小さく、弾性定数(K33)が大きく、絶対値が大きな負の誘電率異方性(Δε)を有するため、これを用いたVA型やPSA型、PSVA型等の液晶表示素子は表示品位の優れた応答速度の速いものであることが確認された。
(比較例3、実施例16、実施例17)
LC-B(比較例3)、LC-7(実施例16)及びLC-8(実施例17)の液晶組成物を調製し、その物性値を測定した。液晶組成物の構成とその物性値の結果は表3のとおりであった。
以上のことから、本発明の液晶組成物は、屈折率異方性(Δn)及びネマチック相-等方性液体相転移温度(Tni)を低下させることなく、粘度(η)が十分に小さく、回転粘性(γ1)が十分に小さく、弾性定数(K33)が大きく、絶対値が大きな負の誘電率異方性(Δε)を有するため、これを用いたVA型等の液晶表示素子は表示品位の優れた応答速度の速いものであることが確認された。
(比較例4、実施例18~19)
MLC-B(比較例4)、MLC-7(実施例18)及びMLC-8(実施例19)の液晶組成物を調製し、テストセルに真空注入したのち、そのUV照射前後のプレチルト角を測定した。液晶組成物の構成とそのプレチルト角の測定結果は表4のとおりであった。
以上のことから、本発明の液晶組成物は、屈折率異方性(Δn)及びネマチック相-等方性液体相転移温度(Tni)を低下させることなく、粘度(η)が十分に小さく、回転粘性(γ1)が十分に小さく、弾性定数(K33)が大きく、絶対値が大きな負の誘電率異方性(Δε)を有するため、これを用いたVA型やPSA型、PSVA型等の液晶表示素子は表示品位の優れた応答速度の速いものであることが確認された。
(比較例5、実施例20~22)
LC-C(比較例5)、LC-9(実施例20)、LC-10(実施例21)及びLC-11(実施例22)の液晶組成物を調製し、その物性値を測定した。液晶組成物の構成とその物性値の結果は表5のとおりであった。
以上のことから、本発明の液晶組成物は、屈折率異方性(Δn)及びネマチック相-等方性液体相転移温度(Tni)を低下させることなく、粘度(η)が十分に小さく、回転粘性(γ1)が十分に小さく、弾性定数(K33)が大きく、絶対値が大きな負の誘電率異方性(Δε)を有するため、これを用いたVA型等の液晶表示素子は表示品位の優れた応答速度の速いものであることが確認された。
(比較例6、実施例23~27)
MLC-C(比較例6)、MLC-9-1(実施例23)、MLC-9-2(実施例24)、MLC-9-3(実施例25)、MLC-10(実施例26)及びMLC-11(実施例27)の液晶組成物を調製し、テストセルに真空注入したのち、そのUV照射前後のプレチルト角を測定した。液晶組成物の構成とそのプレチルト角の測定結果は表6のとおりであった。
以上のことから、本発明の液晶組成物は、屈折率異方性(Δn)及びネマチック相-等方性液体相転移温度(Tni)を低下させることなく、粘度(η)が十分に小さく、回転粘性(γ1)が十分に小さく、弾性定数(K33)が大きく、絶対値が大きな負の誘電率異方性(Δε)を有するため、これを用いたVA型やPSA型、PSVA型等の液晶表示素子は表示品位の優れた応答速度の速いものであることが確認された。
Claims (14)
- 一般式(I)
L11は-OCH2-、-CH2O-、-CF2O-、-OCF2-、-CH2CH2-、-CF2CF2-又は単結合を表し、L11が複数存在する場合はそれらは同一でも異なっていてもよく、
m11は0、1又は2を表し、
環A1は1,4-フェニレン基を表し、環B1はそれぞれ独立的にトランス-1,4-シクロへキシレン基、1,4-フェニレン基、2-フルオロ-1,4-フェニレン基、3-フルオロ-1,4-フェニレン基、3,5-ジフルオロ-1,4-フェニレン基、2,3-ジフルオロ-1,4-フェニレン基、1,4-シクロヘキセニレン基、1,4-ビシクロ[2.2.2]オクチレン基、ピペリジン-1,4-ジイル基、ナフタレン-2,6-ジイル基、デカヒドロナフタレン-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-ジイル基を表すが、環B1が複数存在する場合はそれらは同一でも異なっていてもよく、環B1は炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲン、シアノ基又はニトロ基で置換されていても良い。)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)中のm11が1である請求項1に記載の液晶組成物。
- 一般式(I)中の環B1が無置換又は炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲン、シアノ基又はニトロ基で置換された1,4-フェニレン基である請求項2に記載の液晶組成物。
- 更に一般式(N3)
- 更に一般式(II)
L21及びL22は-OCH2-、-CH2O-、-CF2O-、-OCF2-、-CH2CH2-、-CF2CF2-又は単結合を表し、L11及びL22が複数存在する場合はそれらは同一でも異なっていてもよく、
m21は及びn21はそれぞれ独立的に0、1又は2を表すが、m21+n21は1、2又は3を表し、
環A2及び環B2はそれぞれ独立的にトランス-1,4-シクロへキシレン基、1,4-フェニレン基、2-フルオロ-1,4-フェニレン基、3-フルオロ-1,4-フェニレン基、3,5-ジフルオロ-1,4-フェニレン基、2,3-ジフルオロ-1,4-フェニレン基、1,4-シクロヘキセニレン基、1,4-ビシクロ[2.2.2]オクチレン基、ピペリジン-1,4-ジイル基、ナフタレン-2,6-ジイル基、デカヒドロナフタレン-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-ジイル基を表すが、環A2及び/又は環B2が複数存在する場合はそれらは同一でも異なっていてもよく、環A2及び環B2はそれぞれ独立して炭素原子数1~12のアルキル基、炭素原子数1~12のハロゲン化アルキル基、炭素原子数1~12のアルコキシ基、炭素原子数1~12のハロゲン化アルコキシ基、ハロゲン、シアノ基又はニトロ基で置換されていても良い。ただし、式(I)で表される化合物は含まない。)
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5いずれか1項に記載の液晶組成物。 - 25℃における誘電率異方性(Δε)が-2.0から-8.0の範囲であり、20℃における屈折率異方性(Δn)が0.08から0.14の範囲であり、20℃における粘度(η)が5から30mPa・sの範囲であり、20℃における回転粘性(γ1)が50から150mPa・sの範囲であり、ネマチック相-等方性液体相転移温度(Tni)が60℃から120℃の範囲である請求項1から8いずれか1項に記載の液晶組成物。
- 更に重合性化合物を1種又は2種以上含有する請求項1から9のいずれか1項に記載の液晶組成物。
- 重合性化合物が一般式(RM-1)
SM1は、炭素原子数1~12のアルキレン基、又は単結合を表し、該アルキレン基中の-CH2-は酸素原子同士が直接結合しないものとして酸素原子、-COO-、-OCO-、又は-OCOO-に置き換えられても良く、
RM1は以下の式(R-1)から式(R-15)
LM1及びLM2はお互い独立して、単結合、-O-、-CH2-、-OCH2-、-CH2O-、-CO-、-C2H4-、―COO-、-OCO-、―CH=CH-COO-、-COO―CH=CH-、-OCO-CH=CH-、-CH=CH-OCO-、―COOC2H4-、―OCOC2H4-、―C2H4OCO-、―C2H4COO-、-OCOCH2-、―CH2COO-、-CH=CH-、-CF=CH-、-CH=CF-、-CF=CF-、-CF2-、-CF2O-、-OCF2-、-CF2CH2-、-CH2CF2-、-CF2CF2-又は-C≡C-を表し、LM2が複数存在する場合はそれらは同一でも異なっていてもよく、
存在するMM1は、1,4-フェニレン基、1,4-シクロヘキシレン基、ナフタレン-2,6-ジイル基を表すが、これらの基中に含まれる水素原子がフッ素原子、塩素原子、又は炭素原子数1~8のアルキル基、ハロゲン化アルキル基、ハロゲン化アルコキシ基、アルコキシ基、ニトロ基、又は
mM1は0、1又は2を表すが、
XM1~XM5、SM1、RM1、LM2及び/又はMM1が複数存在する場合にはそれらは同一であっても異なっていてもよい。)で表される化合物である請求項10に記載の液晶組成物。 - 請求項1から11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11のいずれか1項に記載の液晶組成物を用いたアクティブマトリックス駆動用液晶表示素子。
- 請求項1から11のいずれか1項に記載の液晶組成物を用いたVAモード、PSAモード、PSVAモード、IPSモード又はECBモード用液晶表示素子。
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KR102026510B1 (ko) | 2016-03-31 | 2019-09-27 | 주식회사 엘지화학 | 화합물, 이를 이용한 고분자 및 이를 이용한 전해질막 |
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JP6369663B1 (ja) * | 2016-11-22 | 2018-08-08 | Dic株式会社 | 液晶組成物及び液晶表示素子 |
CN111234844A (zh) * | 2016-11-22 | 2020-06-05 | Dic株式会社 | 液晶组合物和液晶显示元件 |
CN111234844B (zh) * | 2016-11-22 | 2023-03-14 | Dic株式会社 | 液晶组合物和液晶显示元件 |
Also Published As
Publication number | Publication date |
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US20160215215A1 (en) | 2016-07-28 |
EP3029126B1 (en) | 2019-02-27 |
TW201522580A (zh) | 2015-06-16 |
JPWO2015034018A1 (ja) | 2017-03-02 |
JP5790899B2 (ja) | 2015-10-07 |
EP3029126A4 (en) | 2017-03-29 |
CN105518105B (zh) | 2017-06-16 |
KR20160036629A (ko) | 2016-04-04 |
EP3029126A1 (en) | 2016-06-08 |
CN105518105A (zh) | 2016-04-20 |
KR101687596B1 (ko) | 2016-12-19 |
TWI640606B (zh) | 2018-11-11 |
US10040997B2 (en) | 2018-08-07 |
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