Cyclopropyl-bearing liquid crystal compounds and mixtures

Patent metadata

Field	Value
Publication number	US-9404038-B2
Application number	US-201514719700-A
Country	US
Kind code	B2
Filing date	May 22, 2015
Priority date	Dec 12, 2014
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

The present invention is directed to compounds of the following General Formula I. The cyclopropyl-bearing liquid crystal compounds of Formula I of the present invention have a positive or negative dielectric anisotropy (Δ∈), an appropriate optical anisotropy (Δn), an appropriate clearing point (CP), good low-temperature miscibility with other liquid crystals, a low rotary viscosity, and good UV stability and high-temperature thermal stability, and therefore have good use value. The compounds of the present invention can be used for preparing positive and negative liquid crystal compositions and can also be employed in passive and active matrix displays.

First claim

What is claimed is:

1. A liquid crystal compound of Formula I:

wherein, R is H or a C1-C5 alkyl;
m, e, n each is 0, 1 or 2;
Z is a single bond, —CF 2 O—, —CH 2 CH 2 —, —CH 2 O—, —C≡C—, —OCH 2 —, or —OCF 2 —;
X is F, CI, OCF 3 , CF 3 , CN, H, a C1-C5 alkyl, a C1-C5 alkoxy, a C2-C5 alkenoxy, a C2-C5 alkenyl, or a C2-C5 fluoro-substituted alkenyloxy;

each is phenylene, or fluoro-substituted phenylene.

2. A compound selected from a group consisting of:

wherein
R is H or a C1-C5 alkyl;
n is 1 or 2;
X is F, CI, OCF 3 , CF 3 , CN, H, a C1-C5 alkyl, a C1-C5 alkoxy, a C2-C5 alkenoxy, a C2-C5 alkenyl, or a C2-C5 fluoro-substituted alkenyloxy;
(F) is F or H; and
X 1 is a C1-C5 alkyl or a C1-C5 alkoxy.

3. A liquid crystal composition comprising component A, wherein component A comprises a compound of claim 1 .

4. The liquid crystal composition of claim 3 , further comprising components B and C, wherein component B comprises at least one compound of Formula VII, and component C comprises at least one compound of Formula VIII:

wherein
R 1 and R 2 each is a C1-C6 alkyl, or a C2-C6 alkenyl;
R 3 is H, F, a C2-C6 alkenoxy, or a C2-C6 fluoro-substituted alkenyloxy;

is one or more of 1,4-cyclohexylidene, 1,4-phenylene, or fluoro-1,4-phenylene;
p is 2 or 3; and
(F) is H or F.

5. The liquid crystal composition of claim 4 , wherein a mass ratio of component A, B and C is 1-40:5-50:5-80.

6. The liquid crystal composition of claim 5 , wherein the mass ratio of component A, B and C is 10-35:15-45:25-75.

7. The liquid crystal composition of claim 4 , wherein the compound of Formula VII is selected from a compound of Formulas VII 1-VII 10:

8. The liquid crystal composition of claim 4 , wherein the compound of Formula VIII is selected from a compound of Formulas VIII 1-VIII 12:

and wherein in the Formula VIII 1-VIII 12, R 1 and R 2 each is a C1-C6 alkyl or a C2-C6 alkenyl.

9. An electro-optical display comprising the liquid crystal compound of claim 1 .

10. An electro-optical display comprising the liquid crystal composition of claim 4 .

11. An electro-optical display of claim 9 , wherein the electro-optical display is a VA display, IPS display, TN display, STN display or OCB display.

Assignees

• Shijiazhuang Chengzhi Yonghua Display Materials Co Ltd

Inventors

• Yuan Guoliang
• Deng Jia
• Li Ming
• Zhang Hu-Bo
• Qiao yun-xia
• Meng jin-song
• Hua Rui-Mao

Classifications

• C09K2019/3016

  Cy-Ph-Ph · CPC title

• C09K19/3402

  having oxygen as hetero atom (sugars C09K19/0422) · CPC title

• C09K2019/122

  Ph-Ph · CPC title

• C09K19/12 Primary

  at least two benzene rings directly linked, e.g. biphenyls · CPC title

• C09K2019/3019

  Cy-Cy-Ph-Ph · CPC title