Liquid crystal composition containing polymerizable compound and liquid crystal display element manufactured using the same
A liquid crystal composition containing a polymerizable compound contains one or two or more polymerizable compounds having the general formula (I) as a first component and one or two or more non-polymerizable liquid crystal compounds having an alkenyl group as a second component. A liquid crystal display element is manufactured using the liquid crystal composition.
1. A liquid crystal composition containing a polymerizable compound, comprising a first component and a second component, wherein
the first component includes one or two or more compounds selected from the group consisting of polymerizable compounds having the general formula (I), and
(wherein S 11 and S 12 independently denote an alkylene group having 1 to 12 carbon atoms or a single bond, and one —CH 2 — or nonadjacent two or more —CH 2 — in the alkylene group may be substituted by —O—, —COO—, —OCO—, or —OCOO—,
L 11 and L 12 independently denote a single bond, —O—, —CO—, —COO—, —OCO—, or —C≡C—,
m denotes 0 or 1, and
X 11 to X 22 independently denote an alkyl group having 1 to 3 carbon atoms, a trifluoromethyl group, a trifluoromethoxy group, a fluorine atom, a chlorine atom, or a hydrogen atom)
the second component includes one or two or more non-polymerizable liquid crystal compounds having an alkenyl group.
2. The liquid crystal composition containing a polymerizable compound according to claim 1 , wherein the second component includes one or two or more compounds having the general formula (II)
(wherein R 21 and R 22 independently denote an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms, at least one of R 21 and R 22 denotes an alkenyl group having 2 to 10 carbon atoms or an alkenyloxy group having 2 to 10 carbon atoms, one —CH 2 — or nonadjacent two or more —CH 2 — in R 21 and R 22 may be substituted by —O— or —S—, and one or two or more hydrogen atoms in R 21 and R 22 may be substituted by a fluorine atom or a chlorine atom,
Z 21 and Z 22 independently denote a single bond, —CH 2 CH 2 —, —(CH 2 ) 4 —, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 O—, —CH═CH—, or —C≡C—, and
A 21 , B 21 , and C 21 independently denote a 1,4-phenylene group, a 1,4-cyclohexenylene group, a 1,4-bicyclo(2.2.2)octylene group, a naphthalene-2,6-diyl group, a decahydronaphthalene-2,6-diyl group, a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, or a 1,4-cyclohexylene group, A 21 , B 21 , and C 21 may be independently unsubstituted, or a hydrogen atom in A 2 , B 2 , and C 21 may be substituted by a fluorine atom, a chlorine atom, a cyano group, an alkyl group having 1 to 8 carbon atoms, a halogenated alkyl group having 1 to 8 carbon atoms, a halogenated alkoxy group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or a nitro group, and m denotes 0 or 1).
3. The liquid crystal composition containing a polymerizable compound according to claim 1 , wherein at least one of X 11 to X 22 in the general formula (I) denotes a fluorine atom or a methyl group.
4. The liquid crystal composition containing a polymerizable compound according to claim 2 , wherein the second component includes at least one compound selected from compounds having the general formulae (II-1) to (II-4)
(wherein R 21 and R 22 independently denote an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an alkenyloxy group having 2 to 10 carbon atoms, a fluorine atom, a trifluoromethyl group, a trifluoromethoxy group, or a chlorine atom, at least one of R 21 and R 22 denotes an alkenyl group having 2 to 10 carbon atoms or an alkenyloxy group having 2 to 10 carbon atoms, one —CH 2 — or nonadjacent two or more —CH 2 — in R 21 and R 22 may be substituted by —O— or —S—, and one or two or more hydrogen atoms in R 21 and R 22 may be substituted by a fluorine atom or a chlorine atom).
5. The liquid crystal composition containing a polymerizable compound according to claim 2 , wherein the second component includes at least one compound selected from compounds having the general formulae (II-5) to (II-10)
(wherein R 21 and R 22 independently denote an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, or an alkenyloxy group having 2 to 10 carbon atoms, at least one of R 21 and R 22 denotes an alkenyl group having 2 to 10 carbon atoms or an alkenyloxy group having 2 to 10 carbon atoms, one —CH 2 — or nonadjacent two or more —CH 2 — in R 21 and R 22 may be substituted by —O— or —S—, and one or two or more hydrogen atoms in R 21 and R 22 may be substituted by a fluorine atom or a chlorine atom).
6. The liquid crystal composition containing a polymerizable compound according to claim 2 , further comprising a third component and a fourth component, wherein
the third component includes one or two or more compounds selected from the group consisting of compounds having the general formulae (III-1) to (III-4), and
(wherein R 31 and R 32 independently denote an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms, one —CH 2 — or nonadjacent two or more —CH 2 — in R 31 and R 32 may be substituted by —O— or —S—, and one or two or more hydrogen atoms in R 31 and R 32 may be substituted by a fluorine atom or a chlorine atom)
the fourth component includes one or two or more compounds selected from compounds having the general formulae (III-5) to (III-8)
(wherein R 31 and R 32 independently denote an alkyl group having 1 to 10 carbon atoms or an alkoxy group having 1 to 10 carbon atoms, one —CH 2 — or nonadjacent two or more —CH 2 — in R 31 and R 32 may be substituted by —O— or —S—, and one or two or more hydrogen atoms in R 31 and R 32 may be substituted by a fluorine atom or a chlorine atom).
7. The liquid crystal composition containing a polymerizable compound according to claim 1 , wherein the one or two or more compounds having the general formula (I) constitute 0.01% to 2.0% by mass.
8. The liquid crystal composition containing a polymerizable compound according to claim 4 , wherein the at least one compound having the general formulae (II-1) to (II-4) constitutes 5% to 40% by mass.
9. The liquid crystal composition containing a polymerizable compound according to claim 1 , wherein the anisotropy of dielectric constant Δε at 25° C. is in the range of −2.0 to −6.0, the anisotropy of reflective index Δn at 25° C. is in the range of 0.08 to 0.13, and the nematic phase-isotropic liquid phase transition temperature (T ni ) is in the range of 60° C. to 120° C.
10. The liquid crystal composition containing a polymerizable compound according to claim 1 , wherein the liquid crystal composition is used in a liquid crystal display element that contains liquid crystals between a pair of substrates, the substrate including a transparent electrode and a polarizer, and the polymerizable compound(s) in the liquid crystal composition is polymerized to impart liquid crystal orientation ability to the liquid crystal display element.
11. A liquid crystal display element manufactured using a liquid crystal composition containing a polymerizable compound according to claim 1 , wherein the polymerizable compound(s) in the liquid crystal composition is polymerized to impart liquid crystal orientation ability to the liquid crystal display element.
12. An active-matrix liquid crystal display element, manufactured using a liquid crystal composition containing a polymerizable compound according to claim 1 .
13. A VA-mode, PSVA-mode, IPS-mode, or ECB-mode liquid crystal display element, manufactured using a liquid crystal composition containing a polymerizable compound according to claim 1 .