Nematic liquid crystal composition and liquid crystal display element using same

1. A liquid crystal composition containing:

a polymerizable compound as a first component selected from the group consisting of compounds represented by a general formula (I-21) and a general formula (I-22),

wherein in the formulae (I-21) and (I-22), each of R 101 to R 106 independently represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an alkoxyl group having 1 to 12 carbon atoms, P 11 —S 11 —, or P 12 —S 12 —, three or four of R 101 to R 106 represent P 11 —S 11 — or P 12 —S 12 —, at least one of included S 11 and S 12 is a single bond, each of A 11 and B 11 independently represents a 1,4-phenylene group, a 1,4-cyclohexylene group, a naphthalene-2,6-diyl group, or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, in which the group may be unsubstituted or be substituted with an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, or a halogen, and L 13 represents —OCH 2 —, —CH 2 O—, —C 2 H 4 —, —COO—, —OCO—, —CH═CR a —COO—, —CH═CR a —OCO—, —COO—CR a ═CH—, —OCO—CR a ═CH—, —(CH 2 ) z —COO—, —(CH 2 ) z —OCO—, —OCO—(CH 2 ) z —, —COO—(CH 2 ) z —, —CH═CH—, —CF 2 O—, —OCF 2 —, or —C≡C— wherein in the formulae, each R a independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and in the formulae, z represents an integer of 1 to 4;

and

at least one liquid crystal compound having an alkenyl side chain group as a second component, wherein the liquid crystal compound having the alkenyl side chain group is a compound represented by a general formula (II),

wherein in the formula (II), R 21 represents an alkenyl group having 2 to 10 carbon atoms, R 22 represents an alkyl group having 1 to 10 carbon atoms, an alkoxyl 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, one —CH 2 — or each of a plurality of —CH 2 — that do not adjoin, which is present in R 22 , may be independently substituted with —O— and/or —S—, each of at least one hydrogen atom present in R 22 may be independently substituted with a fluorine atom or a chlorine atom, and n 21 represents 0 or 1.

2. The liquid crystal composition according to claim 1 , comprising at least one compound selected from the compound group represented by a general formula (III-1) and a general formula (III-2) as a third component,

wherein in the formulae (III-1) and (III-2), each of R 31 to R 34 independently represents an alkyl group having 1 to 10 carbon atoms, an alkoxyl 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, one —CH 2 — or each of a plurality of —CH 2 — that do not adjoin, present in R 31 to R 34 , may be independently substituted with —O— and/or —S—, each of at least one hydrogen atom present in R 31 to R 34 may be independently substituted with a fluorine atom or a chlorine atom, each of ring A 32 , ring B 31 , and ring B 32 represents a trans-1,4-cyclohexylene group, a 1,4-phenylene group, a 2-fluoro-1,4-phenylene group, a 3-fluoro-1,4-phenylene group, a 3,5-difluoro-1,4-phenylene group, a 2,3-difluoro-1,4-phenylene group, a 1,4-cyclohexenylene group, a 1,4-bicyclo[2.2.2]octylene group, a piperidine-1,4-diyl group, a naphthalene-2,6-diyl group, decahydronaphthalene-2,6-diyl group, or a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, and each of Z 31 and Z 32 independently represents —OCH 2 —, —CH 2 O—, —CF 2 O—, —OCF 2 —, —CH 2 CH 2 —, —CF 2 CF 2 —, or a single bond.

3. The liquid crystal composition according to claim 1 , comprising at least one compound selected from the compound group represented by a general formula (IV-A) to a general formula (IV-J) as another component,

wherein in the formulae (IV-A) to (IV-J), each of R 41 and R 42 independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms, X 41 represents an alkyl group having 1 to 3 carbon atoms, alkoxy group having 1 to 3 carbon atoms, a fluorine atom, or a hydrogen atom.

4. The liquid crystal composition according to claim 1 , further comprising at least one compound selected from the compound group represented by a general formula (I-31) and a general formula (I-32),

wherein in the formulae (I-31) and (I-32), R 107 represents P 107 —S 107 —, R 110 represents P 110 —S 110 —, each of P 107 and P 110 independently represents any one of formula (R-1) to formula (R-15), each of S 107 and S 107 independently represents a single bond or an alkylene group having 1 to 15 carbon atoms, at least one —CH 2 — in the alkylene group may be substituted with —O—, —OCO—, or —COO— such that oxygen atoms do not directly adjoin, each of R 108 , R 109 , R 111 , and R 112 independently represents any one of formula (R-1) to formula (R-15), an alkyl group having 1 to 3 carbon atoms, an alkoxy group having 1 to 3 carbon atoms, a fluorine atom, or a hydrogen atom, A 12 represents a 1,4-phenylene group, a 1,4-cyclohexylene group, a pyridine-2,5-diyl group, a pyrimidine-2,5-diyl group, a naphthalene-2,6-diyl group, an indan-2,5-diyl group, a 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, or a 1,3-dioxane-2,5-diyl group, in which the group may be unsubstituted or may be substituted with an alkyl group having 1 to 12 carbon atoms, an alkoxyl group having 1 to 12 carbon atoms, a halogen, a cyano group, or a nitro group, and L 14 represents a single bond, —OCH 2 —, —CH 2 O—, —C 2 H 4 —, —COO—, —OCO—, —CH═CR a —COO—, —CH═CR a —OCO—, —COO—CR a ═CH—, —OCO—CR a ═CH—, —(CH 2 ) z —COO—, —(CH 2 ) z —OCO—, —OCO—(CH 2 ) z —, —COO—(CH 2 ) z —, —CH═CH—, —CF 2 O—, —OCF 2 —, or —C≡C— wherein each R a independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and z represents an integer of 1 to 4.

5. A liquid crystal display element comprising the liquid crystal composition according to claim 1 .

6. An active-matrix-drive liquid crystal display element comprising the liquid crystal composition according to claim 1 .

7. A liquid crystal display element of PSA mode, PSVA mode, PS-IPS mode, or PS-FSS mode, comprising the liquid crystal composition according to claim 1 .

8. The liquid crystal composition according to claim 1 , wherein a liquid crystal display element comprising the liquid crystal composition has a voltage holding rate of 77-86, the voltage holding rate being after radiation of 12 (J) of UV with high-pressure mercury lamp.

9. The liquid crystal composition according to claim 1 , wherein said at least one of L 11 and L 12 represents —(CH 2 ) z —C(═O)—O—, —(CH 2 ) z —O—(C═O)—, —O—(C═O)—(CH 2 ) z —, —(C═O)—O—(CH 2 ) z —.