WO2015102076A1 - 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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Definitions
- the present invention relates to a highly reliable nematic liquid crystal composition useful as a liquid crystal display material and a liquid crystal display element 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.
- TN twisted nematic
- STN super twisted nematic
- DS dynamic light scattering
- GH guest / host
- IPS in-plane switching
- OCB Optically compensated birefringence
- ECB voltage controlled birefringence
- VA vertical alignment
- CSH color super homeotropic
- FLC ferrroelectric liquid crystal
- Patent Documents 1 to 6 So far, in order to improve the reliability, it has been studied to purify the liquid crystal composition itself and the compound that is a component of the liquid crystal composition to suppress deterioration due to UV irradiation.
- the problem to be solved by the present invention is that refractive index anisotropy ( ⁇ n) and nematic phase-isotropic liquid phase transition temperature (T ni ) are sufficiently high, viscosity ( ⁇ ) is sufficiently small, rotational viscosity ( ⁇ 1 ) Is sufficiently small, the elastic constant (K 33 ) is large, the dielectric anisotropy ( ⁇ ) is large or the absolute value is negative ⁇ , and the reliability of the liquid crystal composition is lowered after UV irradiation.
- An object of the present invention is to provide a liquid crystal display device having a small liquid crystal composition, and having excellent display quality and high response speed using the composition.
- the polymerizable compound-containing liquid crystal composition of the present invention has sufficiently high refractive index anisotropy ( ⁇ n) and nematic phase-isotropic liquid phase transition temperature (T ni ), sufficiently low viscosity ( ⁇ ), and rotational viscosity.
- ⁇ 1 is sufficiently small, the elastic constant (K 33 ) is large, the dielectric anisotropy ( ⁇ ) is large, or the absolute value is negative ⁇ , and the reliability of the liquid crystal composition after UV irradiation Since the decrease is small, it is possible to provide a liquid crystal display element with excellent display quality and quick response speed.
- the polymerizable compound-containing liquid crystal composition of the present invention is a polymerizable compound-containing liquid crystal composition containing a polymerizable compound and a liquid crystal compound, and the polymerizable compound has the general formula (1)
- Z 11 represents a fluorine atom, a cyano group, a hydrogen atom, an alkyl group having 1 to 15 carbon atoms in which a hydrogen atom may be substituted with a halogen atom, and a hydrogen atom in a halogen atom.
- An optionally substituted alkoxy group having 1 to 15 carbon atoms, a hydrogen atom optionally substituted with a halogen atom, and an alkenyl group having 1 to 15 carbon atoms optionally substituted with a halogen atom Represents an alkenyloxy group having 1 to 15 carbon atoms or —Sp 12 —R 12 ;
- R 11 and R 12 are each independently the following formulas (R-1) to (R-15):
- M 12 represents 1,4-phenylene group, 1,4-cyclohexylene group, anthracene-2,6-diyl group, phenanthrene-2,7-diyl group, pyridine-2,5-diyl group, pyrimidine-2, 5-diyl group, naphthalene-2,6-diyl group, indan-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group or 1,3-dioxane-2,5 -Represents a diyl group, but M 12 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 carbon atom May be substituted with a halogenated alkoxy group of formula 1 to 12, a halogen atom, a cyano group, a
- M 13 represents the following formulas (i-13) to (ix-13):
- m 12 represents 0, 1, 2 or 3
- m 11 and m 13 each independently represents 1, 2 or 3
- a plurality of Z 11 they may be the same or different, and when a plurality of R 11 are present, they may be the same or different, and a plurality of R 12 are present. In some cases, they may be the same or different.
- a plurality of Sp 11 they may be the same or different.
- a plurality of Sp 12 they are the same. They may be the same or different when a plurality of L 11 are present, and they may be the same or different when a plurality of M 12 are present. May be.
- R LC represents an alkyl group having 1 to 15 carbon atoms, and one or more CH 2 groups in the alkyl group are- O—, —CH ⁇ CH—, —CO—, —OCO—, —COO— or —C ⁇ C— may be substituted, and one or more hydrogen atoms in the alkyl group are optionally halogenated May be substituted with atoms
- a LC1 and A LC2 are each independently (A) trans-1,4-cyclohexylene group (one CH 2 group present in this group or two or more CH 2 groups not adjacent to each other may be substituted with an oxygen atom or a sulfur atom) ), (B) 1,4-phenylene group (one CH group present in this group or two or more CH groups not adjacent to each other may be substituted with a nitrogen atom), and (c) 1 , 4-bicyclo (2.2.2) octylene group, naphthalene-2,6-diyl group, de
- One or more hydrogen atoms in the alkyl group may be optionally substituted by halogen atoms; a represents an integer of 1 to 4, but when a represents 2, 3 or 4, and there are a plurality of A LC1 , the plurality of A LC1 may be the same or different, and Z LC is When there are a plurality of Z LCs , the plurality of Z LCs may be the same or different. 1) or 2 or more types of compounds represented by the formula, and the total content of polymerizable compounds in the polymerizable compound-containing liquid crystal composition is 0.41% by mass or more and 10.0% by mass or less. It is a compound-containing liquid crystal composition.
- Z 11 is preferably —Sp 12 —R 12
- R 11 and R 12 are each independently represented by the formulas (R-1) to (R-3): Either is preferable.
- m 11 + m 13 is preferably 3 or more.
- L 11 represents a single bond, —OCH 2 —, —CH 2 O—, —CO—, —C 2 H 4 —, —COO—, —OCO—, —COOC 2.
- z in the above formula is preferably an integer of 1 to 4.
- at least one of L 11 and L 12 in the general formula (1) is — (CH 2 ) z —C ( ⁇ O) —O—, — (CH 2 ) z—O— (C ⁇ O).
- m 12 represents 1, 2 or 3, and when m 12 is 1, L 11 is a single bond, and when m 12 is 2 or 3, at least one of L 11 present in plural numbers. One is preferably a single bond.
- m 12 represents 1, 2 or 3, and when m 12 is 1, M 12 is a 1,4-phenylene group, and when m 12 is 2 or 3, a plurality of M 12 are present.
- M 12 adjacent to the M 11 through at least L 11 of 12 is preferably a 1,4-phenylene group.
- m 12 in the general formula (1) represents 1, 2 or 3, and at least one of M 12 is a 1,4-phenylene group substituted with one or two or more fluorines. preferable.
- preferred examples include polymerizable compounds represented by the following formulas (1a-1) to (1a-31).
- polymerizable compounds represented by the following formulas (1b-1) to (1b-34) are also preferable examples.
- polymerizable compounds represented by the following formulas (1c-1) to (1c-52) are also preferable examples.
- the liquid crystal compound preferably contains a compound represented by the following general formula (LC).
- R LC represents an alkyl group having 1 to 15 carbon atoms, and one or more CH 2 groups in the alkyl group are- O—, —CH ⁇ CH—, —CO—, —OCO—, —COO— or —C ⁇ C— may be substituted, and one or more hydrogen atoms in the alkyl group are optionally halogenated May be substituted with atoms
- a LC1 and A LC2 are each independently (A) trans-1,4-cyclohexylene group (one CH 2 group present in this group or two or more CH 2 groups not adjacent to each other may be substituted with an oxygen atom or a sulfur atom) ), (B) 1,4-phenylene group (one CH group present in this group or two or more CH groups not adjacent to each other may be substituted with a nitrogen atom), and (c) 1 , 4-bicyclo (2.2.2) octylene group, naphthalene-2,6-diyl group, de
- the compound represented by the general formula (LC) includes the following general formula (LC1) and general formula (LC2).
- R LC11 and R LC21 each independently represents an alkyl group having 1 to 15 carbon atoms, and one or more CH 2 groups in the alkyl group are not directly adjacent to each other with an oxygen atom. In addition, it may be substituted with —O—, —CH ⁇ CH—, —CO—, —OCO—, —COO— or —C ⁇ C—, and one or more hydrogen atoms in the alkyl group are optionally may be substituted by a halogen atom, a LC11, and a LC21 each independently either structure:
- one or more CH 2 groups in the cyclohexylene group may be substituted with an oxygen atom, and one or more CH groups in the 1,4-phenylene group may be nitrogen.
- one or more hydrogen atoms in the structure may be substituted with F, Cl, CF 3 or OCF 3
- X LC11 , X LC12, X LC21 ⁇ X LC23 each independently represents a hydrogen atom, Cl, F, and CF 3, or OCF 3
- each Y LC11 and Y LC21 are independently hydrogen, Cl, F, CN, CF 3, OCH 2 F, OCHF 2 or OCF 3
- Z LC11 and Z LC21 each independently represent a single bond, —CH ⁇ CH—, —CF ⁇ CF—, —C ⁇ C— , —CH 2 CH 2 —, — (CH 2) 4 -, - OC 2 -, - CH 2 O - , - OCF 2 -, - CF 2
- R LC11 and R LC21 are each independently preferably an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms, and an alkyl group having 1 to 5 carbon atoms.
- Group, an alkoxy group having 1 to 5 carbon atoms, and an alkenyl group having 2 to 5 carbon atoms are more preferable, and a straight chain is more preferable, and the alkenyl group most preferably represents the following structure.
- a LC11 and A LC21 each independently preferably have the following structure.
- Y LC11 and Y LC21 are each independently preferably F, CN, CF 3 or OCF 3 , F or OCF 3 is preferred, and F is particularly preferred.
- Z LC11 and Z LC21 are preferably a single bond, —CH 2 CH 2 —, —COO—, —OCO— , —OCH 2 —, —CH 2 O—, —OCF 2 — or —CF 2 O— , —CH 2 CH 2 —, —OCH 2 —, —OCF 2 — or —CF 2 O— are preferred, and a single bond, —OCH 2 — or —CF 2 O— is more preferred.
- m LC11 and m LC21 are preferably 1, 2 or 3, preferably 1 or 2 when emphasizing storage stability at low temperature and response speed, and 2 or 3 for improving the upper limit of the nematic phase upper limit temperature. Is preferred.
- LC1 is represented by the following general formula (LC1-a) to general formula (LC1-c)
- R LC11, Y LC11, X LC11 and X LC12 each independently represent the same meaning as R LC11, Y LC11, X LC11 and X LC12 in the general formula (LC1)
- a LC1a1, A LC1a2 and A LC1b1 represents a trans-1,4-cyclohexylene group, a tetrahydropyran-2,5-diyl group, or a 1,3-dioxane-2,5-diyl group
- XLC1b1 , XLC1b2 , XLC1c1 to XLC1c4 Each independently represents a hydrogen atom, Cl, F, CF 3, or OCF 3 ), and is preferably one or more compounds selected from the group consisting of compounds represented by:
- R LC11 is preferably independently an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, an alkyl group having 1 to 5 carbon atoms, carbon An alkoxy group having 1 to 5 atoms and an alkenyl group having 2 to 5 carbon atoms are more preferable.
- X LC11 to X LC1c4 are each independently preferably a hydrogen atom or F.
- Y LC11 is preferably independently F, CF 3 or OCF 3 .
- the general formula (LC1) is changed from the following general formula (LC1-d) to the general formula (LC1-o).
- R LC11, Y LC11, X LC11 and X LC12 each independently represent the same meaning as R LC11, Y LC11, X LC11 and X LC12 in the general formula (LC1), A LC1d1, A LC1f1, A LC1g1 , A LC1j1 , A LC1k1 , A LC1k2 , A LC1m1 to A LC1m3 , A LC1n1 , A LC1n2 , A LC1o1 to A LC1o3 are 1,4-phenylene group, trans-1,4-cyclohexylene group, tetrahydropyran -2,5-diyl group, 1,3-dioxane-2,5-diyl group, XLC1d1 , XLC1d2 , XLC1f1 , XLC1f2 , XLC1g1 , XLC1
- R LC11 is preferably independently an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, an alkyl group having 1 to 5 carbon atoms, carbon An alkoxy group having 1 to 5 atoms and an alkenyl group having 2 to 5 carbon atoms are more preferable.
- X LC11 to X LC1m2 are each independently preferably a hydrogen atom or F.
- Y LC11 is preferably independently F, CF 3 or OCF 3 .
- Z LC1d1 to Z LC1m1 are each independently preferably —CF 2 O— or —OCH 2 —.
- the general formula (LC2) is changed from the following general formula (LC2-a) to the general formula (LC2-i).
- R LC21 , Y LC21 , X LC21 to X LC23 each independently represents the same meaning as R LC21 , Y LC21 , X LC21 to X LC23 in the general formula (LC2), and X LC2d1 to X LC2d4 , X LC2e1 to X LC2e4 , X LC2f1 to X LC2f4 and X LC2g1 to X LC2g4 each independently represent a hydrogen atom, Cl, F, CF 3 or OCF 3 , and A LC2h1 , A LC2h2 , A LC2h1 to A LC2h3 are Represents 1,4-phenylene group, trans-1,4-cyclohexylene group, tetrahydropyran-2,5-diyl group, 1,3-dioxane-2,5-diyl group, Z LC2a1 , Z LC
- R LC21 is preferably independently an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, an alkyl group having 1 to 5 carbon atoms, carbon An alkoxy group having 1 to 5 atoms and an alkenyl group having 2 to 5 carbon atoms are more preferable.
- X LC21 to X LC2g4 are each independently preferably a hydrogen atom or F
- Y LC21 is preferably independently F, CF 3 or OCF 3 .
- Z LC2a1 to Z LC2g4 are each independently preferably —CF 2 O— or —OCH 2 —.
- the compounds represented by the general formula (LC) are represented by the following general formula (LC3) to general formula (LC5).
- R LC31, R LC32, R LC41 , R LC42, R LC51 and R LC52 is 1 to 15 carbon atoms independently, one in the alkyl group or two or more
- the CH 2 group may be substituted with —O—, —CH ⁇ CH—, —CO—, —OCO—, —COO— or —C ⁇ C— so that the oxygen atom is not directly adjacent to the alkyl group.
- one or more hydrogen atoms in may be optionally substituted by a halogen atom, a LC31, a LC32, a LC41, a LC42, a LC51 and a LC52 are independently any of the following Structure of
- Z LC31 , Z LC32, Z LC41, Z LC42, Z LC51 and Z LC51 each independently represent a single bond
- -CH CH -, - C ⁇ C -, - CH 2 CH 2 -, - (CH 2) 4 -, - COO —, —OCH 2 —, —CH 2 O—, —OCF 2 — or —CF 2 O—
- Z 5 represents a CH 2 group or an oxygen atom
- X LC41 represents a hydrogen atom or a fluorine atom, m LC31, m LC32, m LC41, m L 42, m LC51 and m
- R LC31 to R LC52 are each independently preferably an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms. Most preferably,
- a LC31 to A LC52 each independently preferably has the following structure:
- Z LC31 to Z LC51 each independently has a single bond, —CH 2 O—, —COO—, —OCO— , —CH 2 CH 2 —, —CF 2 O—, —OCF 2 — or —OCH 2 —. preferable.
- LC3 is the following general formula (LC3-a) and general formula (LC3-b)
- R LC31 , R LC32 , A LC31 and Z LC31 each independently represent the same meaning as R LC31 , R LC32 , A LC31 and Z LC31 in the general formula (LC3)
- X LC3b1 to X LC3b6 are Represents a hydrogen atom or a fluorine atom, and at least one of X LC3b1 and X LC3b2 or X LC3b3 and X LC3b4 represents a fluorine atom, m LC3a1 is 1, 2 or 3, and m LC3b1 is 0 or 1 and when there are a plurality of A LC31 and Z LC31 , they may be the same or different.) Or one or more compounds selected from the group of compounds represented by Is preferred.
- R LC31 and R LC32 each independently represents an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or an alkenyloxy group having 2 to 7 carbon atoms. Is preferably represented.
- a LC31 preferably represents a 1,4-phenylene group, a trans-1,4-cyclohexylene group, a tetrahydropyran-2,5-diyl group, or a 1,3-dioxane-2,5-diyl group. , 4-phenylene group and trans-1,4-cyclohexylene group are more preferable.
- Z LC31 is a single bond, -CH 2 O -, - COO -, - OCO -, - CH 2 CH 2 - is preferred to represent, and more preferably a single bond.
- the general formula (LC3-a) preferably represents the following general formula (LC3-a1) to general formula (LC3-a6).
- R LC31 and R LC32 each independently represent the same meaning as R LC31 and R LC32 in General Formula (LC3).
- R LC31 and R LC32 are each independently preferably an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms, and R LC31 has 1 carbon atom. More preferably, it represents an alkyl group of ⁇ 7 , and R LC32 represents an alkoxy group of 1 to 7 carbon atoms.
- the general formula (LC3-b) is preferably represented by the following general formula (LC3-b1) to general formula (LC3-b13).
- the general formula (LC3-b1), the general formula (LC3-b6), the general formula (LC3-b8), general formula (LC3-b11) and general formula (LC3-b13) are more preferable, general formula (LC3-b1) and general formula (LC3-b6) are more preferable. Most preferably, it represents the general formula (LC3-b1).
- R LC31 and R LC32 each independently represent the same meaning as R LC31 and R LC32 in General Formula (LC3).
- R LC31 and R LC32 are each independently preferably an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms, and R LC31 has 2 carbon atoms. Or an alkyl group having 3 carbon atoms, and more preferably R LC32 represents an alkyl group having 2 carbon atoms.
- LC4 is general formula (LC4-a) to general formula (LC4-c)
- general formula (LC5) is general formula (LC5-a) to general formula (LC5-c).
- R LC41, R LC42 and X LC41 each independently represent the same meaning as R LC41, R LC42 and X LC41 in the general formula (LC4)
- R LC51 and R LC52 is the general independently It represents the same meaning as R LC51 and R LC52 in formula (LC5)
- R LC41, R LC42, R LC51 and R LC52 each independently represents an alkyl group of 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, the number alkenyl group or a carbon atom of 2 to 7 carbon atoms 2 It preferably represents ⁇ 7 alkenyloxy groups.
- Z LC4a1 to Z LC5c1 each independently preferably represents a single bond, —CH 2 O—, —COO—, —OCO— , —CH 2 CH 2 —, and more preferably represents a single bond.
- R LC61 and R LC62 each independently represents an alkyl group having 1 to 15 carbon atoms, and one or two or more CH 2 groups in the alkyl group are not directly adjacent to oxygen atoms
- R LC61 and R LC62 may be substituted with —O—, —CH ⁇ CH—, —CO—, —OCO—, —COO— or —C ⁇ C—
- one or more hydrogen atoms in the alkyl group are It may be optionally substituted with halogen
- a LC61 to A LC63 are each independently
- one or more CH 2 CH 2 groups in the cyclohexylene group may be substituted with —CH ⁇ CH—, —CF 2 O—, —OCF 2 —
- Z LC61 and Z LC62 each independently represents a single bond, —CH ⁇ CH—, —, wherein one or two or more CH groups in the phenylene group may be substituted with a nitrogen atom.
- C ⁇ C -, - CH 2 CH 2 -, - (CH 2) 4 -, - COO -, - OCH 2 -, - CH 2 O -, - OCF 2 - or -CF 2 O-a represents, m III1 Represents 0-3.
- the compounds represented by the general formulas (LC1) to (LC6) are excluded.
- a liquid crystal composition containing one or more compounds represented by formula (1) is preferred.
- R LC61 and R LC62 are each independently preferably an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, or an alkenyl group having 2 to 7 carbon atoms. Most preferably,
- a LC61 to A LC63 each independently preferably has the following structure:
- Z LC61 and Z LC62 are each independently preferably a single bond, —CH 2 CH 2 —, —COO— , —OCH 2 —, —CH 2 O—, —OCF 2 — or —CF 2 O—.
- the general formula (LC6) is changed from the general formula (LC6-a) to the general formula (LC6-m).
- R LC61 and R LC62 are each independently an alkyl group having 1 to 7 carbon atoms, an alkoxy group having 1 to 7 carbon atoms, an alkenyl group having 2 to 7 carbon atoms, or 2 to 7 carbon atoms) It is more preferable that it is 1 type, or 2 or more types of compounds chosen from the group which consists of a compound represented by this.
- the liquid crystal composition of the present invention may further contain a compound represented by the general formula (Q).
- R Q represents a linear or branched alkyl group having 1 to 22 carbon atoms, and one or two or more non-adjacent CH 2 groups in the group are —O—, —CH ⁇ CH—, —CO—, —OCO—, —COO—, —C ⁇ C—, —CF 2 O—, —OCF 2 — may be substituted.
- MQ represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group or a single bond.
- the compound represented by the general formula (Q) is preferably a compound represented by the following general formula (Qa) to general formula (Qe).
- R Q1 is preferably a linear alkyl group or a branched alkyl group having 1 to 10 carbon atoms.
- R Q2 is preferably a linear alkyl group having 1 to 20 carbon atoms or a branched alkyl group.
- R Q3 is preferably a linear alkyl group having 1 to 8 carbon atoms, a branched alkyl group, a linear alkoxy group, or a branched alkoxy group.
- L Q is preferably a linear alkylene group having 1 to 8 carbon atoms or a branched alkylene group.
- L Q2 is preferably a linear alkylene group having 2 to 12 carbon atoms or a branched alkylene group.
- the liquid crystal composition of the present invention contains one or more compounds represented by formula (Q), preferably 1 to 5 compounds, and more preferably 1 to 3 compounds. It is particularly preferable to contain one kind. Further, the content is preferably 0.001% by mass to 1% by mass, more preferably 0.001% by mass to 0.1% by mass, and particularly preferably 0.001% by mass to 0.05% by mass. .
- the total content of the polymerizable compound of the general formula (1) in the polymerizable compound-containing liquid crystal composition of the present invention is preferably 0.41% by mass to 10% by mass.
- sufficient UV resistance cannot be obtained when the total content of the polymerizable compound of the general formula (1) is less than 0.41% by mass.
- the polymerizable compound plays an important role in improving the UV resistance of the composition in the polymerizable compound-containing liquid crystal composition of the present invention. That is, in the polymerizable compound-containing liquid crystal composition of the present invention, the higher the content of the polymerizable compound, the better the UV resistance of the composition.
- the polymerizable compound and the polymer thereof have a function of protecting the liquid crystal compound from UV.
- This function is achieved by the polymerizable compounds represented by the formulas (1a-1) to (1a-30), the polymerizable compounds represented by the formulas (1b-1) to (1b-34), and the formula (1c -1) to a polymerizable compound represented by formula (1c-52), a polymerizable compound represented by formula (1d-1) to formula (1d-36), and a polymerizable compound similar to these,
- the polymerizable compounds represented by the formulas (1d-1) to (1d-36) and similar polymerizable compounds are strong.
- the polymerizable compound-containing liquid crystal composition of the present invention if the total content of the polymerizable compound of the general formula (1) is too large, refractive index anisotropy ( ⁇ n) or nematic phase-isotropic liquid phase Since physical property values other than UV resistance such as transition temperature (T ni ), viscosity ( ⁇ ), rotational viscosity ( ⁇ 1), elastic constant (K 33 ), or dielectric anisotropy ( ⁇ ) deteriorate, general formula ( The total content of the polymerizable compound 1) is preferably 10% by mass or less.
- the total content of the polymerizable compound of the general formula (1) is more preferably 0.46% by mass to 5% by mass.
- the total content of the polymerizable compound of the general formula (1) is more preferably from 0.51% by mass to 3% by mass, and most preferably from 0.56% by mass to 2% by mass.
- the dielectric anisotropy ( ⁇ ) at 25 ° C. is 2.0 to 20.0. 0.0 to 18.0 is preferable, 4.0 to 16.0 is more preferable, and 4.0 to 14.0 is particularly preferable.
- the dielectric anisotropy ( ⁇ ) at 25 ° C. is from ⁇ 1.5 to ⁇ 8.0.
- -2.0 to -6.0 is preferred, -2.0 to -5.0 is more preferred, and -2.5 to -4.0 is particularly preferred.
- the polymerizable compound-containing 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 from 0.09. 0.12 is 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 polymerizable compound-containing liquid crystal composition of the present invention has a viscosity ( ⁇ ) at 20 ° C. of 10 to 30 mPa ⁇ s, more preferably 10 to 25 mPa ⁇ s, and preferably 10 to 20 mPa ⁇ s. Particularly preferred.
- the polymerizable compound-containing liquid crystal composition of the present invention has a rotational viscosity ( ⁇ 1 ) at 20 ° C. of 50 to 130 mPa ⁇ s, more preferably 50 to 110 mPa ⁇ s, and more preferably 50 to 90 mPa ⁇ s. It is particularly preferred.
- the liquid crystal composition containing a polymerizable compound 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 110 ° C., and more preferably 70 ° C. to 100 ° C. Is particularly preferred.
- T ni nematic phase-isotropic liquid phase transition temperature
- the liquid crystal display device using the polymerizable compound-containing liquid crystal composition of the present invention has a remarkable feature of high UV resistance and high-speed response, and is particularly useful for a liquid crystal display device for driving an active matrix. Applicable for VA mode, PSVA mode, PSA mode, IPS mode or ECB mode.
- the liquid crystal display element using the polymerizable compound-containing liquid crystal composition of the present invention is a liquid crystal display element having a liquid crystal layer formed between a pair of substrates, a transparent electrode, and a polarizing plate, It is a liquid crystal display element in which the polymerizable compound-containing liquid crystal composition of the present invention is accommodated in a space formed between the substrates, and liquid crystal alignment ability is imparted by polymerizing the polymerizable compound in the liquid crystal layer.
- Examples of such a liquid crystal display element include PSVA mode, PSA mode, and PS-IPS mode liquid crystal display elements.
- the two substrates of the liquid crystal cell used in the liquid crystal display element using the polymerizable liquid crystal compound-containing liquid crystal composition of the present invention can be made of a transparent material having flexibility such as glass or plastic, and one of them is silicon.
- An opaque material such as A transparent substrate having a transparent electrode layer can be obtained, for example, by sputtering indium tin oxide (ITO) on a transparent substrate such as a glass plate.
- the color filter can be prepared by, for example, a pigment dispersion method, a printing method, an electrodeposition method, or a dyeing method.
- a method for producing a color filter by a pigment dispersion method will be described as an example.
- a curable coloring composition for a color filter is applied on the transparent substrate, subjected to patterning treatment, and cured by heating or light irradiation. By performing this process for red, green, blue, and / or other colors, a pixel portion for a color filter can be created.
- a pixel electrode provided with an active element such as a TFT, a thin film diode, or a metal insulator metal specific resistance element may be provided on the substrate.
- a normal vacuum injection method or an ODF method can be used as a method for sandwiching the polymerizable compound-containing liquid crystal composition of the present invention between two substrates.
- substrate is made to oppose so that a transparent electrode layer may become an inner side.
- it is preferable to adjust so that the thickness of the obtained light control layer is 1 to 100 ⁇ m. More preferably, the thickness is 1.5 to 10 ⁇ m.
- a polarizing plate it is preferable to adjust the product of the refractive index anisotropy ⁇ n of the liquid crystal and the cell thickness d so that the contrast is maximized.
- the polarizing axis of each polarizing plate can be adjusted so that the viewing angle and contrast are good.
- a retardation film for widening the viewing angle can also be used.
- the spacer include glass particles, plastic particles, alumina particles, and a photoresist material.
- a sealing agent such as a thermosetting or photosensitive composition can be used by an appropriate method according to the injection method, and the substrates can be sealed with a constant spacing.
- a method of polymerizing the polymerizable compound since rapid progress of polymerization is desirable, a method of polymerizing by irradiating active energy rays such as ultraviolet rays or electron beams is preferable.
- active energy rays such as ultraviolet rays or electron beams
- a polarized light source or a non-polarized light source may be used.
- the polymerization is performed in a state where the polymerizable compound-containing liquid crystal composition of the present invention is sandwiched between two substrates, at least the substrate on the irradiation surface side is given appropriate transparency to the active energy rays. It must be done.
- the orientation state of the unpolymerized part is changed by changing conditions such as an electric field, a magnetic field, or temperature, and further irradiation with active energy rays is performed. Then, it is possible to use a means for polymerization.
- a liquid crystal display element of PSVA mode or PSA mode it is preferable to expose the polymerizable compound-containing liquid crystal composition to ultraviolet rays while applying an alternating electric field.
- the alternating electric field to be applied is preferably an alternating current having a frequency of 10 Hz to 10 kHz, more preferably a frequency of 50 Hz to 10 kHz, and the voltage is selected depending on a desired pretilt angle of the liquid crystal display element. That is, the pretilt angle of the liquid crystal display element can be controlled by the applied voltage. In the MVA mode liquid crystal display element, the pretilt angle is preferably controlled from 80 degrees to 89 degrees from the viewpoint of alignment stability and contrast.
- the temperature at the time of irradiation with active energy rays is preferably within a temperature range in which the liquid crystal state of the liquid crystal composition of the present invention is maintained. Polymerization is preferably performed at a temperature close to room temperature, that is, typically at a temperature of 15 to 35 ° C.
- a lamp for generating ultraviolet rays a metal halide lamp, a high-pressure mercury lamp, an ultra-high pressure mercury lamp, or the like can be used.
- a wavelength of the ultraviolet-ray to irradiate it is preferable to cut and use an ultraviolet-ray as needed.
- Intensity of ultraviolet irradiation is preferably from 0.1mW / cm 2 ⁇ 100W / cm 2, 2mW / cm 2 ⁇ 50W / cm 2 is more preferable.
- the amount of energy of ultraviolet rays to be irradiated can be adjusted as appropriate, but is preferably 10 mJ / cm 2 to 500 J / cm 2, and more preferably 100 mJ / cm 2 to 200 J / cm 2 .
- the intensity may be changed.
- the time for irradiation with ultraviolet rays is appropriately selected depending on the intensity of the ultraviolet rays to be irradiated, but is preferably 10 seconds to 3600 seconds.
- 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.
- VHR VHR before UV irradiation
- VHR VHR after UV irradiation
- the cell thickness is 3.5 ⁇ m
- the alignment film is a test cell of JALS2096
- Vsel is 5 V
- Vnsel is 1 V
- the measurement temperature is 20 ° C.
- DTS301 of AUTRONIC-MELCHERS is used.
- VHR was measured using VHR-1 (Toyo Technica) at 1V, 60Hz, 60 ° C.
- VHR values of MLC-A-1 to 3 (Comparative Examples 1-1 to 3) and MLC-1-1 to 3 (Examples 1-1 to 3) before and after UV irradiation are summarized in a graph and shown in FIG. .
- the VHR after UV irradiation of the liquid crystal compositions MLC-1-1 to 3 of the present invention clearly showed a higher value than the comparative examples MLC-A-1 to 3, and showed sufficient UV resistance. .
- the liquid crystal composition of the present invention exhibits high UV resistance regardless of the type of polymerizable compound and the type of polymerizable compound used in combination, as in MLC-1-4 to 15 (Examples 1-4 to 15).
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-B was prepared as a base liquid crystal. The composition of the liquid crystal composition and its physical property values are shown in Table 3.
- Example 2 MLC-B (Comparative Example 2) and MLC-2-1 to 3 (Examples 2-1 to 3) were prepared, and the UV was injected into the test cell. VHR before and after irradiation was measured.
- the composition of the liquid crystal composition and the VHR measurement results are shown in Table 4.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-C was prepared as the base liquid crystal.
- the composition of the liquid crystal composition and its physical property values are shown in Table 5.
- Example 3 MLC-C (Comparative Example 3) and MLC-3-1 to 3 (Examples 3-1 to 3) were prepared, and the UV was injected into the test cell. VHR before and after irradiation was measured.
- the composition of the liquid crystal composition and the VHR measurement results are shown in Table 6.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-D was prepared as the base liquid crystal.
- the composition of the liquid crystal composition and its physical property values are shown in Table 7.
- Example 4 MLC-D (Comparative Example 4) and MLC-4-1 to 4 (Examples 4-1 to 4) were prepared, and the UV was injected into the test cell. VHR before and after irradiation was measured.
- the composition of the liquid crystal composition and the VHR measurement results are shown in Table 8.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-E was prepared as the base liquid crystal. The composition of the liquid crystal composition and its physical property values are shown in Table 9.
- Example 5 MLC-E (Comparative Example 5) and MLC-5-1 to 4 (Examples 5-1 to 4) were prepared, and the UV was injected into the test cell. VHR before and after irradiation was measured. Table 10 shows the composition of the liquid crystal composition and the VHR measurement results. In addition, the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-F was prepared as a base liquid crystal. Table 11 shows the composition of the liquid crystal composition and its physical property values.
- Example 6 MLC-F (Comparative Example 6) and MLC-6-1 to 4 (Examples 6-1 to 4) were prepared.
- VHR before and after irradiation was measured.
- Table 12 shows the composition of the liquid crystal composition and the VHR measurement results.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-G was prepared as a base liquid crystal. Table 13 shows the composition of the liquid crystal composition and its physical property values.
- Example 7 MLC-G (Comparative Example 7) and MLC-7-1 to 4 (Examples 7-1 to 4) were prepared, and the UV was injected into the test cell. VHR before and after irradiation was measured. Table 14 shows the composition of the liquid crystal composition and the VHR measurement results. In addition, the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-H was prepared as a base liquid crystal. Table 15 shows the composition of the liquid crystal composition and its physical property values.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-I was prepared as a base liquid crystal. Table 17 shows the composition of the liquid crystal composition and its physical property values.
- Example 9 MLC-I (Comparative Example 9) and MLC-9-1 to 4 (Examples 9-1 to 4) were prepared, vacuum injected into a test cell, and then UV VHR before and after irradiation was measured.
- Table 18 shows the composition of the liquid crystal composition and the VHR measurement results.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), rotational viscosity ( ⁇ 1 ) And the elastic constant (K 33 ), and the UV resistance is sufficiently high. Therefore, it was confirmed that a liquid crystal display element such as a VA type using the same has excellent display quality.
- LC-J was prepared as the base liquid crystal. Table 19 shows the composition of the liquid crystal composition and its physical property values.
- Example 10 MLC-J (Comparative Example 10) and MLC-10-1 to 4 (Examples 10-1 to 4) were prepared.
- VHR before and after irradiation was measured.
- Table 20 shows the composition of the liquid crystal composition and the VHR measurement results.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), and rotational viscosity ( ⁇ 1 ), And the UV resistance is sufficiently high. Therefore, it has been confirmed that liquid crystal display elements such as TN, IPS, and FFS types using this have excellent display quality. (Comparative Example 11, Examples 11-1 to 4) LC-K was prepared as the base liquid crystal. The composition of the liquid crystal composition and its physical property values are shown in Table 21.
- Example 11 MLC-K (Comparative Example 11) and MLC-11-1 to 4 (Examples 11-1 to 4) were prepared, and the UV was injected into the test cell. VHR before and after irradiation was measured. Table 22 shows the composition of the liquid crystal composition and the VHR measurement results. In addition, the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), and rotational viscosity ( ⁇ 1 ), And the UV resistance is sufficiently high. Therefore, it has been confirmed that liquid crystal display elements such as TN, IPS, and FFS types using this have excellent display quality.
- LC-L was prepared as a base liquid crystal. Table 23 shows the composition and physical property values of the liquid crystal composition.
- Example 12 MLC-L (Comparative Example 12) and MLC-12-1 to 4 (Examples 12-1 to 4) were prepared.
- VHR before and after irradiation was measured.
- Table 24 shows the composition of the liquid crystal composition and the VHR measurement results.
- the liquid crystal composition to which the polymerizable compound was added did not have a large change in physical property value as compared to before the addition of the polymerizable compound.
- the liquid crystal composition of the present invention has a nematic phase-isotropic liquid phase transition temperature (T ni ), refractive index anisotropy ( ⁇ n), dielectric anisotropy ( ⁇ ), and rotational viscosity ( ⁇ 1 ), And the UV resistance is sufficiently high. Therefore, it has been confirmed that liquid crystal display elements such as TN, IPS, and FFS types using this have excellent display quality.
Abstract
Description
R11及びR12はそれぞれ独立して以下の式(R-1)から式(R-15):
Sp11及びSp12はスペーサー基を表し、
L11及びL12はそれぞれ独立して、単結合、-O-、-S-、-CH2-、-OCH2-、-CH2O-、-CO-、-C2H4-、-COO-、-OCO-、-OCOOCH2-、-CH2OCOO-、-OCH2CH2O-、-CO-NRa-、-NRa-CO-、-SCH2-、-CH2S-、-CH=CRa-COO-、-CH=CRa-OCO-、-COO-CRa=CH-、-OCO-CRa=CH-、-COO-CRa=CH-COO-、-COO-CRa=CH-OCO-、-OCO-CRa=CH-COO-、-OCO-CRa=CH-OCO-、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-、-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-、-CH=CH-、-CF=CF-、-CF=CH-、-CH=CF-、-CF2-、-CF2O-、-OCF2-、-CF2CH2-、-CH2CF2-、-CF2CF2-又は-C≡C-(式中、Raはそれぞれ独立して水素原子又は炭素原子数1~4のアルキル基を表し、前記式中、zは1~4の整数を表す。)を表し、
M12は、1,4-フェニレン基、1,4-シクロヘキシレン基、アントラセン-2,6-ジイル基、フェナントレン-2,7-ジイル基、ピリジン-2,5-ジイル基、ピリミジン-2,5-ジイル基、ナフタレン-2,6-ジイル基、インダン-2,5-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1,3-ジオキサン-2,5-ジイル基を表すが、M12は無置換であるか又は炭素原子数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、ハロゲン原子、シアノ基、ニトロ基又は-R11で置換されていても良く、
M11は以下の式(i-11)~(ix-11):
M13は以下の式(i-13)~(ix-13):
m12は0、1、2又は3を表し、m11及びm13はそれぞれ独立して1、2又は3を表すが、
Z11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く、R11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く、R12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く、Sp11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く、Sp12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く、L11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く、M12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1種又は2種以上含有し、
前記液晶化合物として、一般式(LC)で表される化合物
ALC1及びALC2は、それぞれ独立して、
(a)トランス-1,4-シクロヘキシレン基(この基中に存在する1個のCH2基又は隣接していない2個以上のCH2基は酸素原子又は硫黄原子で置換されていてもよい。)、
(b)1,4-フェニレン基(この基中に存在する1個のCH基又は隣接していない2個以上のCH基は窒素原子で置換されていてもよい。)、及び
(c)1,4-ビシクロ(2.2.2)オクチレン基、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、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基、又はクロマン-2,6-ジイル基
からなる群より選ばれる基を表すが、上記の基(a)、基(b)又は基(c)に含まれる1つ又は2つ以上の水素原子はそれぞれ、F、Cl、CF3又はOCF3で置換されていてもよく、
ZLCは単結合、-CH=CH-、-CF=CF-、-C≡C-、-CH2CH2-、-(CH2)4-、-OCH2-、-CH2O-、-OCF2-、-CF2O-、-COO-又は-OCO-を表し、
YLCは、水素原子、フッ素原子、塩素原子、シアノ基、及び炭素原子数1~15のアルキル基を表し、該アルキル基中の1つ又は2つ以上のCH2基は、酸素原子が直接隣接しないように、-O-、-CH=CH-、-CO-、-OCO-、-COO-、-C≡C-、-CF2O-、-OCF2-で置換されてよく、該アルキル基中の1つ又は2つ以上の水素原子は任意にハロゲン原子によって置換されていてもよく、
aは1~4の整数を表すが、aが2、3又は4を表し、ALC1が複数存在する場合、複数存在するALC1は、同一であっても異なっていても良く、ZLCが複数存在する場合、複数存在するZLCは、同一であっても異なっていても良い。)で表される化合物を1種又は2種以上含有し、重合性化合物含有液晶組成物中の重合性化合物の含有量合計値が0.41質量%以上10.0質量%以下である重合性化合物含有液晶組成物である。
また、前記一般式(1)において、L11は、単結合、-OCH2-、-CH2O-、-CO-、-C2H4-、-COO-、-OCO-、-COOC2H4-、-OCOC2H4-、-C2H4OCO-、-C2H4COO-、-CH=CH-、-CF2-、-CF2O-、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-、-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-、-OCF2-又は-C≡C-であり、
L12は、-OCH2CH2O-、-COOC2H4-、-OCOC2H4-、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-、-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-、-C2H4OCO-又は-C2H4COO-であり、前記式中のzは、1~4の整数であることが好ましい。
また、前記一般式(1)のL11およびL12の少なくともいずれかが、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-および-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-からなる群から選択される少なくとも1種であることが好ましい。
また、前記一般式(1)のm12は1、2又は3を表し、m12が1の場合L11は単結合であり、m12が2又は3の場合複数存在するL11の少なくとも1つは単結合であることが好ましい。
また、前記一般式(1)のm12は1、2又は3を表し、m12が1の場合M12は1,4-フェニレン基であり、m12が2又は3の場合複数存在するM12のうち少なくともL11を介してM11と隣接するM12は1,4-フェニレン基であることが好ましい。
更に、前記一般式(1)のm12は1、2又は3を表し、M12の少なくとも1つが、1つ又は2つ以上のフッ素で置換されている1,4-フェニレン基であることが好ましい。
ALC1及びALC2は、それぞれ独立して、
(a)トランス-1,4-シクロヘキシレン基(この基中に存在する1個のCH2基又は隣接していない2個以上のCH2基は酸素原子又は硫黄原子で置換されていてもよい。)、
(b)1,4-フェニレン基(この基中に存在する1個のCH基又は隣接していない2個以上のCH基は窒素原子で置換されていてもよい。)、及び
(c)1,4-ビシクロ(2.2.2)オクチレン基、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、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基、又はクロマン-2,6-ジイル基
からなる群より選ばれる基を表すが、上記の基(a)、基(b)又は基(c)に含まれる1つ又は2つ以上の水素原子はそれぞれ、F、Cl、CF3又はOCF3で置換されていてもよく、
ZLCは単結合、-CH=CH-、-CF=CF-、-C≡C-、-CH2CH2-、-(CH2)4-、-OCH2-、-CH2O-、-OCF2-、-CF2O-、-COO-又は-OCO-を表し、
YLCは、水素原子、フッ素原子、塩素原子、シアノ基、及び炭素原子数1~15のアルキル基を表し、該アルキル基中の1つ又は2つ以上のCH2基は、酸素原子が直接隣接しないように、-O-、-CH=CH-、-CO-、-OCO-、-COO-、-C≡C-、-CF2O-、-OCF2-で置換されてよく、該アルキル基中の1つ又は2つ以上の水素原子は任意にハロゲン原子によって置換されていてもよく、
aは1~4の整数を表すが、aが2、3又は4を表し、ALC1が複数存在する場合、複数存在するALC1は、同一であっても異なっていても良く、ZLCが複数存在する場合、複数存在するZLCは、同一であっても異なっていても良い。)
前記一般式(LC)で表される化合物は、下記一般式(LC1)及び一般式(LC2)
で表される化合物群から選ばれる1種又は2種以上の化合物であることが好ましい。
ALC11及びALC21はそれぞれ独立して下記の構造が好ましい。
一般式(LC2)は、下記一般式(LC2-a)から一般式(LC2-i)
YLC21はそれぞれ独立してF、CF3又はOCF3が好ましい。
ALC31~ALC52はそれぞれ独立して下記の構造が好ましく、
RLC31及びRLC32はそれぞれ独立して炭素原子数1~7のアルキル基、炭素原子数1~7のアルコキシ基、炭素原子数2~7のアルケニル基又は炭素原子数2~7のアルケニルオキシ基を表すことが好ましい。
ALC31は、1,4-フェニレン基、トランス-1,4-シクロヘキシレン基、テトラヒドロピラン-2,5-ジイル基、1,3-ジオキサン-2,5-ジイル基を表すことが好ましく、1,4-フェニレン基、トランス-1,4-シクロヘキシレン基を表すことがより好ましい。
ZLC31は単結合、-CH2O-、-COO-、-OCO-、-CH2CH2-を表すことが好ましく、単結合を表すことがより好ましい。
一般式(LC3-a)としては、下記一般式(LC3-a1)~一般式(LC3-a6)を表すことが好ましい。
RLC31及びRLC32はそれぞれ独立して、炭素原子数1~7のアルキル基、炭素原子数1~7のアルコキシ基、炭素原子数2~7のアルケニル基が好ましく、RLC31が炭素原子数1~7のアルキル基を表し、RLC32が炭素原子数1~7のアルコキシ基を表すことがより好ましい。
RLC31及びRLC32はそれぞれ独立して、炭素原子数1~7のアルキル基、炭素原子数1~7のアルコキシ基、炭素原子数2~7のアルケニル基が好ましく、RLC31が炭素原子数2又は3のアルキル基を表し、RLC32が炭素原子数2のアルキル基を表すことがより好ましい。
ALC61~ALC63はそれぞれ独立して下記の構造が好ましく、
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。なお、nは自然数を表す。
(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
(連結基)
-n- -CnH2n-
-nO- -CnH2n-O-
-On- -O-CnH2n-
-COO- -C(=O)-O-
-OCO- -O-C(=O)-
-CF2O- -CF2-O-
-OCF2- -O-CF2-
(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℃における回転粘度(mPa・s)
K33 :20℃における弾性定数K33(pN)
初期電圧保持率(VHR):UVを照射する前のVHR(%)
UV照射後電圧保持率(VHR):UVを照射した後のVHR(%)
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。
母体液晶としてLC-Aを調製した。液晶組成物の構成とその物性値は表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、ネマチック相-等方性液体相転移温度(Tni)、屈折率異方性(Δn)、誘電率異方性(Δε)、回転粘度(γ1)および弾性定数(K33)を悪化させることがなく、耐UV性が十分に高いため、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ものであることが確認された。
(比較例2、実施例2-1~3)
母体液晶としてLC-Bを調製した。液晶組成物の構成とその物性値は表3のとおりであった。
(比較例3、実施例3-1~3)
母体液晶としてLC-Cを調製した。液晶組成物の構成とその物性値は表5のとおりであった。
(比較例4、実施例4-1~4)
母体液晶としてLC-Dを調製した。液晶組成物の構成とその物性値は表7のとおりであった。
(比較例5、実施例5-1~4)
母体液晶としてLC-Eを調製した。液晶組成物の構成とその物性値は表9のとおりであった。
(比較例6、実施例6-1~4)
母体液晶としてLC-Fを調製した。液晶組成物の構成とその物性値は表11のとおりであった。
(比較例7、実施例7-1~4)
母体液晶としてLC-Gを調製した。液晶組成物の構成とその物性値は表13のとおりであった。
(比較例8、実施例8-1~4)
母体液晶としてLC-Hを調製した。液晶組成物の構成とその物性値は表15のとおりであった。
(比較例9、実施例9-1~4)
母体液晶としてLC-Iを調製した。液晶組成物の構成とその物性値は表17のとおりであった。
(比較例10、実施例10-1~4)
母体液晶としてLC-Jを調製した。液晶組成物の構成とその物性値は表19のとおりであった。
(比較例11、実施例11-1~4)
母体液晶としてLC-Kを調製した。液晶組成物の構成とその物性値は表21のとおりであった。
(比較例12、実施例12-1~4)
母体液晶としてLC-Lを調製した。液晶組成物の構成とその物性値は表23のとおりであった。
Claims (13)
- 重合性化合物と液晶化合物とを含有する重合性化合物含有液晶組成物であって、前記重合性化合物として、一般式(1)
R11及びR12はそれぞれ独立して以下の式(R-1)から式(R-15):
Sp11及びSp12はスペーサー基を表し、
L11及びL12はそれぞれ独立して、単結合、-O-、-S-、-CH2-、-OCH2-、-CH2O-、-CO-、-C2H4-、-COO-、-OCO-、-OCOOCH2-、-CH2OCOO-、-OCH2CH2O-、-CO-NRa-、-NRa-CO-、-SCH2-、-CH2S-、-CH=CRa-COO-、-CH=CRa-OCO-、-COO-CRa=CH-、-OCO-CRa=CH-、-COO-CRa=CH-COO-、-COO-CRa=CH-OCO-、-OCO-CRa=CH-COO-、-OCO-CRa=CH-OCO-、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-、-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-、-CH=CH-、-CF=CF-、-CF=CH-、-CH=CF-、-CF2-、-CF2O-、-OCF2-、-CF2CH2-、-CH2CF2-、-CF2CF2-又は-C≡C-(式中、Raはそれぞれ独立して水素原子又は炭素原子数1~4のアルキル基を表し、前記式中、zは1~4の整数を表す。)を表し、
M12は、1,4-フェニレン基、1,4-シクロヘキシレン基、アントラセン-2,6-ジイル基、フェナントレン-2,7-ジイル基、ピリジン-2,5-ジイル基、ピリミジン-2,5-ジイル基、ナフタレン-2,6-ジイル基、インダン-2,5-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1,3-ジオキサン-2,5-ジイル基を表すが、M12は無置換であるか又は炭素原子数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、ハロゲン原子、シアノ基、ニトロ基又は-R11で置換されていても良く、
M11は以下の式(i-11)~(ix-11):
M13は以下の式(i-13)~(ix-13):
m12は0、1、2又は3を表し、m11及びm13はそれぞれ独立して1、2又は3を表すが、
Z11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く、R11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く、R12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く、Sp11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く、Sp12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く、L11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く、M12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1種又は2種以上含有し、
前記液晶化合物として、一般式(LC)で表される化合物
ALC1及びALC2は、それぞれ独立して、
(a)トランス-1,4-シクロヘキシレン基(この基中に存在する1個のCH2基又は隣接していない2個以上のCH2基は酸素原子又は硫黄原子で置換されていてもよい。)、
(b)1,4-フェニレン基(この基中に存在する1個のCH基又は隣接していない2個以上のCH基は窒素原子で置換されていてもよい。)、及び
(c)1,4-ビシクロ(2.2.2)オクチレン基、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、1,2,3,4-テトラヒドロナフタレン-2,6-ジイル基、又はクロマン-2,6-ジイル基
からなる群より選ばれる基を表すが、上記の基(a)、基(b)又は基(c)に含まれる1つ又は2つ以上の水素原子はそれぞれ、F、Cl、CF3又はOCF3で置換されていてもよく、
ZLCは単結合、-CH=CH-、-CF=CF-、-C≡C-、-CH2CH2-、-(CH2)4-、-OCH2-、-CH2O-、-OCF2-、-CF2O-、-COO-又は-OCO-を表し、
YLCは、水素原子、フッ素原子、塩素原子、シアノ基、及び炭素原子数1~15のアルキル基を表し、該アルキル基中の1つ又は2つ以上のCH2基は、酸素原子が直接隣接しないように、-O-、-CH=CH-、-CO-、-OCO-、-COO-、-C≡C-、-CF2O-、-OCF2-で置換されてよく、該アルキル基中の1つ又は2つ以上の水素原子は任意にハロゲン原子によって置換されていてもよく、
aは1~4の整数を表すが、aが2、3又は4を表し、ALC1が複数存在する場合、複数存在するALC1は、同一であっても異なっていても良く、ZLCが複数存在する場合、複数存在するZLCは、同一であっても異なっていても良い。)で表される化合物を1種又は2種以上含有し、重合性化合物含有液晶組成物中の重合性化合物の含有量合計値が0.41質量%以上10.0質量%以下である重合性化合物含有液晶組成物。 - 一般式(LC)で表される化合物として一般式(LC1)及び一般式(LC2)
- 一般式(LC)で表される化合物として一般式(LC3)~一般式(LC5)
- 一般式(LC)で表される化合物として一般式(LC6)
- 前記一般式(1)において、Z11は-Sp12-R12を表し、R11及びR12はそれぞれ独立して式(R-1)から式(R-3)のいずれかを表す請求項1~4のいずれか1項に記載の重合性化合物含有液晶組成物。
- 前記一般式(1)において、m11+m13が3以上である請求項1~5のいずれか1項に記載の重合性化合物含有液晶組成物。
- 前記一般式(1)において、L11は、単結合、-OCH2-、-CH2O-、-CO-、-C2H4-、-COO-、-OCO-、-COOC2H4-、-OCOC2H4-、-C2H4OCO-、-C2H4COO-、-CH=CH-、-CF2-、-CF2O-、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-、-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-、-OCF2-又は-C≡C-であり、
L12は、-OCH2CH2O-、-COOC2H4-、-OCOC2H4-、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-、-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-、-C2H4OCO-又は-C2H4COO-であり、前記式中のzは、1~4の整数である、請求項1~6のいずれか1項に記載の重合性化合物含有液晶組成物。 - 前記一般式(1)のL11およびL12の少なくともいずれかが、-(CH2)z-C(=O)-O-、-(CH2)z-O-(C=O)-および-O-(C=O)-(CH2)z-、-(C=O)-O-(CH2)z-からなる群から選択される少なくとも1種である、請求項1~7のいずれか1項に記載の重合性化合物含有液晶組成物。
- 前記一般式(1)のm12は1、2又は3を表し、m12が1の場合L11は単結合であり、m12が2又は3の場合複数存在するL11の少なくとも1つは単結合である、請求項1~8のいずれか1項に記載の重合性化合物含有液晶組成物。
- 前記一般式(1)のm12は1、2又は3を表し、m12が1の場合M12は1,4-フェニレン基であり、m12が2又は3の場合複数存在するM12のうち少なくともL11を介してM11と隣接するM12は1,4-フェニレン基である請求項1~9のいずれか1項に記載の重合性化合物含有液晶組成物。
- 前記一般式(1)のm12は1、2又は3を表し、M12の少なくとも1つが、1つ又は2つ以上のフッ素で置換されている1,4-フェニレン基である請求項1~10のいずれか1項に記載の重合性化合物含有液晶組成物。
- 誘電率異方性が負であることを特徴とする請求項1~11のいずれか1項に記載の重合性化合物含有液晶組成物。
- 一対の基板間に形成された液晶層と、透明電極と、偏光板と、を有する液晶表示素子であって、前記一対の基板間に形成された空間内に請求項1~12のいずれか1項に記載の重合性化合物含有液晶組成物を収容し、前記液晶層内で前記重合性化合物を重合することにより液晶配向能を付与した液晶表示素子。
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JP2017031379A (ja) * | 2015-08-06 | 2017-02-09 | 旭硝子株式会社 | 液晶組成物および液晶光学素子 |
KR20170017720A (ko) * | 2015-08-06 | 2017-02-15 | 아사히 가라스 가부시키가이샤 | 액정 조성물 및 액정 광학 소자 |
TWI697550B (zh) * | 2015-08-06 | 2020-07-01 | 日商Agc股份有限公司 | 液晶組成物及液晶光學元件 |
TWI714509B (zh) * | 2015-08-06 | 2020-12-21 | 日商Agc股份有限公司 | 液晶組成物及液晶光學元件 |
KR102630296B1 (ko) | 2015-08-06 | 2024-01-26 | 에이지씨 가부시키가이샤 | 액정 조성물 및 액정 광학 소자 |
WO2018168205A1 (ja) * | 2017-03-14 | 2018-09-20 | Jnc株式会社 | 重合性化合物および液晶表示素子 |
JPWO2018168205A1 (ja) * | 2017-03-14 | 2019-11-07 | Jnc株式会社 | 重合性化合物および液晶表示素子 |
WO2018216605A1 (ja) * | 2017-05-25 | 2018-11-29 | シャープ株式会社 | 液晶組成物、液晶表示装置、及び、液晶表示装置の製造方法 |
WO2019102859A1 (ja) * | 2017-11-21 | 2019-05-31 | Dic株式会社 | 液晶組成物及び液晶表示素子 |
WO2020017622A1 (ja) * | 2018-07-20 | 2020-01-23 | 公立大学法人兵庫県立大学 | 光反応性組成物、光反応性組成物を用いた液晶セル、及び液晶セルの製造方法 |
JP7471577B2 (ja) | 2018-07-20 | 2024-04-22 | 兵庫県公立大学法人 | 光反応性組成物、光反応性組成物を用いた液晶セル、及び液晶セルの製造方法 |
JPWO2020121639A1 (ja) * | 2018-12-12 | 2021-02-15 | Dic株式会社 | 重合性化合物含有液晶組成物及び液晶表示素子ならびに重合性化合物 |
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CN105899644A (zh) | 2016-08-24 |
DE112014006109T5 (de) | 2016-10-06 |
JPWO2015102076A1 (ja) | 2017-03-23 |
KR20180069142A (ko) | 2018-06-22 |
JP6468096B2 (ja) | 2019-02-13 |
US20160319192A1 (en) | 2016-11-03 |
TW201533225A (zh) | 2015-09-01 |
KR101878803B1 (ko) | 2018-07-16 |
CN109054861A (zh) | 2018-12-21 |
DE112014006109B4 (de) | 2018-09-20 |
JP2015206053A (ja) | 2015-11-19 |
JP5885052B2 (ja) | 2016-03-15 |
KR20160095026A (ko) | 2016-08-10 |
TWI656198B (zh) | 2019-04-11 |
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