Liquid crystal composition and application thereof

Patent metadata

Field	Value
Publication number	US-10040998-B2
Application number	US-201315035203-A
Country	US
Kind code	B2
Filing date	Nov 15, 2013
Priority date	Nov 7, 2013
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

Disclosed is a liquid crystal composition and use thereof. The liquid crystal composition comprises components a, b and c; wherein component a is selected from one of the compounds represented by formula I; component b is a liquid crystal composition having a dielectric anisotropy of greater than 3; and component c is a liquid crystal composition having a dielectric anisotropy of −3 to 3. The liquid crystal composition has a high contrast ratio property, and has a low change rate at a low temperature, that is, the decrease of contrast ratio at a low temperature (such as −20° C.) is smaller as compared to a normal temperature. The composition has suitable properties with regard to practical applications, including a broader nematic phase range, an appropriate dielectric anisotropy, optical anisotropy and operating voltage, an excellent response time, a high electrical resistivity and voltage holding ratio, a low rotary viscosity, etc.

First claim

The invention claimed is:

1. A liquid crystal composition, comprising components A, B, and C;
wherein said component A is selected from at least one of compounds of formula I;
said component B is a liquid crystal compound having a dielectric anisotropy of greater than 3; and
said component C is a liquid crystal compound having a dielectric anisotropy of −3 to 3;

wherein in said formula I, R 0 is selected from any one of an H atom, C1-C10 alkyls, fluoro-substituted C1-C10 alkyls, C1-C10 alkoxys, fluoro-substituted C1-C10 alkoxys, C2-C10 alkenyls, fluoro-substituted C2-C10 alkenyls, C3-C8 alkenoxys, and fluoro-substituted C3-C8 alkenoxys;
wherein R 1 is
selected from H, Cl, F, —CN, —OCN, —OCF 3 , —CF 3 , —CHF 2 , —CH 2 F, —OCHF 2 , —SCN, —NCS, —SF 5 , C1-C15 alkyls, C1-C15 alkoxys, C2-C15 alkenyls, or C2-C15 alkenoxys;
wherein X 1 and X 2 , which are identical or different, are each selected from either of atoms H and fluorine;
wherein Z 1 and Z 2 , which are identical or different, are each selected from at least one of single bonds, —CH 2 —CH 2 —, —(CH 2 ) 4 —, —CH═CH—, —C≡C—, —COO—, —OOC—, —CF 2 O—, —OCH 2 —, —CH 2 O—, —OCF 2 —, —CF 2 CH 2 —, —CH 2 CF 2 —, —C 2 F 4 —, and —CF═CF—;

is each selected from at least one of single bonds, and the following groups:

wherein both a and b are an integer selected from 0-3; and
wherein c is 1 or 2, and a +b+c≤5.

2. The composition according to claim 1 , wherein said liquid crystal composition is composed of components A, B, and C.

3. The composition according to claim 1 , wherein a mass ratio of said components A, B, to C is 10-70:10-70:5-70.

4. The composition according to claim 1 , wherein the compound as represented by formula I is any one of compounds as represented by I1-I10 and I17 as below:

wherein in said formulas I1-I10 and I17, the definition of R 1 is the same as that of the R 1 in the formula I in claim 1 ;
wherein in said formulas I1-I10 and I17, each —(F) represents —F or —H;
wherein said component B is selected from at least one of compounds as represented by formula II:

wherein in said formula II, the definition of R 4 is the same as that of the R 0 in formula I;
wherein the definitions of

are the same as that of

wherein the definitions of X 3 and X 5 are the same as that of the X 1 in said formula I;
wherein the definition of X 4 is the same as that of the R 1 in said formula I;
wherein e is an integer of 0-3;
wherein the compound as represented by the formula II is any one of compounds as represented by formulas II-1 to II-13 as below:

wherein in said formulas II-1 to II-13, the definitions of R 4 and X 4 are respectively the same as those of the R 4 and X 4 in said formula II;
wherein —(F) represents —F or —H;
wherein said component C is selected from at least one of compounds as represented by formula III:

wherein in said formula III, the definitions of R 2 and R 3 are the same as that of the R 0 in the formula I in claim 1 ;
wherein the definition of

is the same as that of the

in the formula I in claim 1 ;
wherein d is an integer of 0-3;
wherein said compound as represented by the formula III is any one of compounds as represented by formulas III-1 to III-10 as below:

wherein in said formulas III-1 to III-10, the definitions of R 2 and R 3 are both the same as that of the R 0 in the formula I in claim 1 ;
wherein —(F) represents —F or —H.

5. The composition according to claim 1 , wherein said liquid crystal composition further comprises at least one of compounds as represented by formulas IV and V;

wherein in said formulas IV and V, the definitions of R 5 and R 6 are the same as that of the R 0 in the formula I in claim 1 ;
wherein the definition of R 7 is the same as that of the R 1 in the formula I in claim 1 ;
wherein the definitions of

are the same as that of the

in the formula I in claim 1 ;
wherein Z 3 is selected from any least one of —CH 2 —CH 2 —, —CH═CH—, —C≡C—, —COO—, —OOC—, —OCH 2 —, —CH 2 O—, —CF 2 CH 2 —, —CH 2 CF 2 —, —C 2 F 4 —, and —CF═CF—;
wherein the definition of X 6 is the same as that of the X 1 in the formula I in claim 1 ;
wherein the definition of X 7 is the same as that of the X 4 in the formula I in claim 4 ; and
wherein f, g, h, and i are all integers of 0-3.

6. The composition according to claim 5 , wherein a mass ratio of said compound as represented by the formula IV to said compound as represented by the formula V is 0-30:0-40;
wherein a mass ratio of said compound as represented by the formula IV to said compound as represented by the formula III is 0-30:5-70;
and wherein neither a mass of the compound as represented by formula IV nor that of the compound as represented by formula V is 0.

7. The composition according to claim 5 , wherein said compound as represented by the formula IV is any one of compounds as represented by formulas IV-1 to IV-5 as below:

wherein in said formulas IV-1 to IV-5, the definitions of R 5 and R 6 are both the same as that of the R 0 in the formula I in claim 1 ;
wherein —(F) represents —F or —H;
wherein said compound as represented by the formula V is any one of compounds as represented by formulas V-1 to V-17 as below:

wherein in said formulas V-1 to V-17, the definition of R 7 is the same as that of the R 1 in the formula I in claim 1 ; and
wherein —(F) represents —F or —H.

8. A liquid crystal display element or liquid crystal display comprising a liqui

Assignees

• Shijiazhuang Chengzhi Yonghua Display Materials Co Ltd

Inventors

• Yun Guoliang
• Qiao Yunxia
• Hua Ruimao
• Zhang Xing
• Li Ming
• Wang Jin
• Duan Yajie
• Cui Hongmei
• Li Yamin
• Feng Jingyi

Classifications

• C09K19/3068

  chain containing -COO- or -OCO- groups · CPC title

• G02F1/1333

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• C09K19/0208

  Twisted Nematic (T.N.); Super Twisted Nematic (S.T.N.); Optical Mode Interference (O.M.I.) · CPC title

• C09K2019/3096

  Cyclobutane rings · CPC title

• C09K19/44

  containing compounds with benzene rings directly linked · CPC title