Liquid crystal composition and liquid crystal display element
Provided are a polymerizable compound represented by formula I and a liquid crystal composition comprising the polymerizable compound, particularly a PSVA liquid crystal composition for displays or TV applications and a PSA-IPS liquid crystal composition for an IPS mode; in particular, the polymerizable compound has a faster polymerization rate, and a “material system” formed from the selected polymerizable component and liquid crystal component has a lower rotary viscosity and better photoelectric properties, and has a high VHR after (UV) photoradiation, this avoiding the problem of the occurrence of residual images to final displays.
1. A polymerizable liquid crystal compound represented by formulas I-1 to I-23:
wherein
each S independently represents H, a C1-C5 alkyl group, a C1-C5 alkoxy group, a fluorine-substituted C1-C5 alkyl group, a fluorine-substituted C1-C5 alkoxy group, F or Cl, wherein any one or more unconnected CH 2 may be independently replaced by —O—, —S—, —CO—, —CH 2 O—, —OCH 2 —, —COO—, —OOC— or an acrylate group or a methacrylate group;
each P independently represents
each Sp independently represents a single bond, a C1-C5 alkyl group, a C1-C5 alkenyl group, wherein any one or more unconnected CH 2 may be replaced by —O—, —S—, —CO—, —CH 2 O—, —OCH 2 —, —COO—, —OOC— or an acrylate group;
and each o independently represents 0, 1, 2 or 3.
2. The polymerizable liquid crystal compound according to claim 1 , wherein the compound represented by formula I-1 to I-23 is a compound represented by formulas I-1-1 to I-23-4:
3. A liquid crystal composition, comprising one or more compounds represented by formula I-1 to I-23 of claim 1 as a first component, one or more compounds represented by formula II as a second component, and one or more compounds represented by formula III as a third component:
wherein
R 1 , R 2 , R 3 , and R 4 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more unconnected CH 2 in the groups represented by R 3 and R 4 may be substituted with cyclopentyl, cyclobutyl or cyclopropyl;
Z 1 and Z 2 each independently represent a single bond, —CH 2 CH 2 — or —CH 2 O—;
each independently represent
each independently represent one or more of
m represents 1 or 2; and
n represents 0, 1 or 2.
4. The liquid crystal composition according to claim 3 , wherein in said liquid crystal composition, a total mass content of the compounds represented by formula I-1 to I-23 is 0.01-1%, a total mass content of the compounds represented by formula II is 15-60%, and a total mass content of the compounds represented by formula III is 20-60%.
5. The liquid crystal composition according to claim 3 , wherein said one or more compounds represented by formula II are one or more compounds represented by formulas II-1 to II-15; and said one or more compounds represented by formula III are one or more compounds represented by formulas III-1 to III-12:
wherein
R 3 and R 4 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more unconnected CH 2 in the groups represented by R 3 and R 4 may be substituted with cyclopentyl, cyclobutyl or cyclopropyl.
6. The liquid crystal composition according to claim 3 , wherein said liquid crystal composition is a negative liquid crystal composition, and further comprises one or more compounds represented by formula IV:
wherein
R 5 and R 6 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluorine-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more CH 2 in the groups represented by R 5 and R 6 may be substituted with cyclopentyl, cyclobutyl or cyclopropyl;
and W represents O, S or —CH 2 O—.
7. The liquid crystal composition according to claim 3 , wherein said liquid crystal composition is a negative liquid crystal composition, and further comprises one or more compounds represented by formula V:
wherein
R 7 and R 8 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or an fluorine-substituted alkenoxy group having a carbon atom number of 3-8;
and
each independently represent 1,4-phenylene, 1,4-cyclohexylene or 1,4-cyclohexenylene.
8. The liquid crystal composition according to claim 3 , wherein said liquid crystal composition is a negative liquid crystal composition, and further comprises one or more compounds represented by formula VI,
wherein
R 9 and R 10 each independently represent an alkyl group having a carbon atom number of 1-10, a fluorine-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluorine-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluorine-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or an fluorine-substituted alkenoxy group having a carbon atom number of 3-8;
represents 1,4-phenylene, 1,4-cyclohexylene or 1,4-cyclohexenylene;
and each (F) independently represents H or F.
9. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 3 , wherein said display element or display is an active matrix display element or display or a passive matrix display element or display.
10. The liquid crystal display element or liquid crystal display according to claim 9 , wherein said active matrix display element or display is a PSVA-TFT liquid crystal display element or display.