Liquid crystal composition and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-10442993-B2
Application number	US-201715808846-A
Country	US
Kind code	B2
Filing date	Nov 9, 2017
Priority date	Nov 10, 2016
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy and large dielectric anisotropy, or having a suitable balance regarding at least two of the characteristics. The liquid crystal composition contains a quencher as a first additive, and may contain a specific compound having large negative dielectric anisotropy as a first component, a specific compound having high maximum temperature or small viscosity as a second component, or a specific compound having a polymerizable group as a second additive.

First claim

What is claimed is:

1. A liquid crystal composition that contains a compound represented by formula (1) as a first additive and at least one compound represented by formula (2) as a first component, and has a nematic phase and negative dielectric anisotropy:

wherein, in formula (2), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring A and ring C are independently 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, 1,4-phenylene in which at least one hydrogen is replaced by fluorine or chlorine, or tetrahydropyran-2,5-diyl; ring B is 2,3-difluoro-1,4-phenylene, 2-chloro-3-fluoro-1,4-phenylene, 2,3-difluoro-5-methyl-1,4-phenylene, 3,4,5-trifluoronaphthalene-2,6-diyl or 7,8-difluorochroman-2,6-diyl; Z 1 and Z 2 are independently a single bond, ethylene, methyleneoxy or carbonyloxy; a is 1, 2 or 3, and b is 0 or 1; and a sum of a and b is 3 or less.

2. The liquid crystal composition according to claim 1 , wherein a proportion of the first additive is in the range of 0.005% by weight to 2% by weight.

3. The liquid crystal composition according to claim 1 , containing at least one compound selected from the group of compounds represented by formula (2-1) to formula (2-22) as the first component:

wherein, in formula (2-1) to formula (2-22), R 1 and R 2 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, alkenyloxy having 2 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

4. The liquid crystal composition according to claim 1 , wherein a proportion of the first component is in the range of 10% by weight to 90% by weight.

5. The liquid crystal composition according to claim 1 , containing at least one compound represented by formula (3) as a second component:

wherein, in formula (3), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; ring D and ring E are independently 1,4-cyclohexylene, 1,4-phenylene, 2-fluoro-1,4-phenylene or 2,5-difluoro-1,4-phenylene; Z 3 is a single bond, ethylene or carbonyloxy; and c is 1, 2 or 3.

6. The liquid crystal composition according to claim 5 , containing at least one compound selected from the group of compounds represented by formula (3-1) to formula (3-13) as the second component:

wherein, in formula (3-1) to formula (3-13), R 3 and R 4 are independently alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, alkenyl having 2 to 12 carbons, or alkenyl having 2 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

7. The liquid crystal composition according to claim 5 , wherein a proportion of the second component is in the range of 10% by weight to 90% by weight.

8. The liquid crystal composition according to claim 1 , containing at least one compound represented by formula (4) as a second additive:

wherein, in formula (4), ring F and ring I are independently cyclohexyl, cyclohexenyl, phenyl, 1-naphthyl, 2-naphthyl, tetrahydropyran-2-yl or 1,3-dioxane-2-yl, pyrimidine-2-yl or pyridine-2-yl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which one hydrogen is replaced by fluorine or chlorine; ring G is 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,4-phenylene, naphthalene-1,2-diyl, naphthalene-1,3-diyl, naphthalene-1,4-diyl, naphthalene-1,5-diyl, naphthalene-1,6-diyl, naphthalene-1,7-diyl, naphthalene-1,8-diyl, naphthalene-2,3-diyl, naphthalene-2,6-diyl, naphthalene-2,7-diyl, tetrahydropyran-2,5-diyl, 1,3-dioxane-2,5-diyl, pyrimidine-2,5-diyl or pyridine-2,5-diyl, and in the rings, at least one hydrogen may be replaced by fluorine, chlorine, alkyl having 1 to 12 carbons, alkoxy having 1 to 12 carbons, or alkyl having 1 to 12 carbons in which at least one hydrogen is replaced by fluorine or chlorine; Z 4 and Z 5 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one —CH 2 — may be replaced by —O—, —CO—, —COO— or —OCO—, and at least one —CH 2 —CH 2 — may be replaced by —CH═CH—, —C(CH 3 )═CH—, —CH═C(CH 3 )— or —C(CH 3 )═C(CH 3 )—, and in these groups, at least one hydrogen may be replaced by fluorine or chlorine; P 1 , P 2 and P 3 are independently a polymerizable group; Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in these groups, at least one hydrogen may be replaced by fluorine or chlorine; d is 0, 1 or 2; e, f and g are independently 0, 1, 2, 3 or 4; and a sum of e, f and g is 1 or more.

9. The liquid crystal composition according to claim 8 , wherein, in formula (4), P 1 , P 2 and P 3 are independently a group selected from the group of polymerizable groups represented by formula (P-1) to formula (P-5):

wherein, in formula (P-1) to formula (P-5), M 1 , M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine.

10. The liquid crystal composition according to claim 8 , containing at least one compound selected from the group of polymerizable compounds represented by formula (4-1) to formula (4-27) as the second additive:

wherein, in formula (4-1) to formula (4-27), P 4 , P 5 and P 6 are independently a polymerizable group selected from the group of groups represented by formula (P-1) to formula (P-3), in which M 1 , M 2 and M 3 are independently hydrogen, fluorine, alkyl having 1 to 5 carbons, or alkyl having 1 to 5 carbons in which at least one hydrogen is replaced by fluorine or chlorine:

wherein, Sp 1 , Sp 2 and Sp 3 are independently a single bond or alkylene having 1 to 10 carbons, and in the alkylene, at least one —CH 2 — may be replaced by —O—, —COO—, —OCO— or —OCOO—, and at least one —CH 2 —CH 2 — may be replaced by —CH═CH— or —C≡C—, and in these groups, at least one hydrogen may be replaced by fluorine or chlorine.

11. The liquid crystal composition according to claim 8 , wherein a proportion of the second additive is in the range of 0.03% by weight to 10% by wei

Assignees

• Jnc Corp
• Jnc Petrochemical Corp

Inventors

• Saito Masayuki

Classifications

• C09K2019/548

  stabilizing the alignment; Polymer stabilized alignment · CPC title

• C09K2019/3425

  Six-membered ring with oxygen(s) in fused, bridged or spiro ring systems · CPC title

• C09K19/54

  Additives having no specific mesophase {characterised by their chemical composition} · CPC title

• C09K19/3066

  in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers · CPC title

• G02F1/1362

  Active matrix addressed cells {(G02F1/134336, G02F1/134363 take precedence)} · CPC title