Liquid crystal composition and use thereof

Patent metadata

Field	Value
Publication number	US-2020339884-A1
Application number	US-201816608577-A
Country	US
Kind code	A1
Filing date	Jun 28, 2018
Priority date	Jun 30, 2017
Publication date	Oct 29, 2020
Grant date	—

Abstract

A liquid crystal composition contains: at least one compound of general formula I and at least one polymerizable compound of general formula II. Such a liquid crystal composition has a suitable optical anisotropy, a suitable dielectric anisotropy, and a better pretilt angle consistency while maintaining a relatively high clearing point, and the drop mura is good. When the liquid crystal composition is applied to a PSA liquid crystal display, the liquid crystal composition has an excellent display effect.

First claim

1 . A liquid crystal composition, wherein, the liquid crystal composition comprises:
at least one compound of general formula I

and
at least one polymerizable compound of general formula II

in which,
R 1 and R 2 each independently represents —H, —F, C 1-12 alkyl or alkoxy, C 2-12 alkenyl or alkenoxy, —OR 5 OR 6 ,

wherein one or more H on the alkyl or alkoxy and the alkenyl or alkenoxy can be substituted by F, and at least one of R 1 and R 2 is —OR 5 OR6;
R 5 and R 6 each independently represents C 1-12 alkyl or C2-12 alkenyl;
Z 1 represents single bond, —COO—, —OCO—, —CH 2 O—, —OCH 2 — or —CH 2 CH 2 —;
L 1 and L 2 each independently represents —F, —Cl, —CN or —NCS;
ring

represents

wherein one or more —CH 2 — in

can be replaced by —O—, one or more H on

can be substituted by halogen;
n represents 0, 1, 2 or 3, and when n is 2 or 3, ring

be same or different, Z 1 can be same or different;
P 1 and P 2 each independently represents

or —SH;
r 1 represents 1, 2 or 3;
r 2 and r 3 each independently represents a positive integer of 0˜6;
r 4 and r 5 each independently represents 0, 1, 2, 3 or 4;
Z 2 represents single bond, —CH 2 CH 2 —, —COO—, —OCO—, —CH 2 O—, —OCH 2 — or —CH=CH—COO—;
Z p1 and Z p2 are same or different and each independently selected from a group consisting of single bond, —O—, —S—, —NH—, —NHCOO—, —OCONH—, —CF 2 O—, —OCF 2 —, —CF 2 S—, —SCF 2 —, —CH 2 CH 2 —, —CF 2 CH 2 —, —CH 2 CF 2 —, —CF 2 CF 2 —, —CF=CH—, —CH=CF—, —CF=CF—, —CO—, —COO—, —OCO—, —OCOO—, —CH 2 —, —OCH 2 —, —SCH 2 —, —CH 2 S—, —CH=CH—, —CC—, —CH=CH—COO— and —OCO—CH=CH—;
Y 1 and Y 2 each independently represents H, halogen, C 1-3 alkyl or alkoxy.

2 . The liquid crystal composition according to claim 1 , wherein the compound of general formula I is selected from a group consisting of the following compounds:

in which,
R 11 and R 21 each independently represents —H, —F, C 1-7 alkyl or alkoxy, C 2-7 alkenyl or alkenoxy, —OR 51 OR 61 ,

wherein one or more H on the alkyl or alkoxy and the alkenyl or alkenoxy can be substituted by F, and at least one of R 11 and R 21 is —OR 51 R 61 ;
R 51 and R 61 each independently represents C 1-10 alkyl or C 2-10 alkenyl.

3 . The liquid crystal composition according to claim 1 , wherein P 1 and P 2 in the general formula II each independently represents

4 . The liquid crystal composition according to claim 3 , wherein the compound of general formula II is selected from a group consisting of the following compounds:

5 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises at least one compound of general formula III

R 3 and R 4 each independently represents —H, —F, C 1-12 alkyl or alkoxy, C 2-12 alkenyl or alkenoxy,

wherein one or more H on the alkyl or alkoxy and the alkenyl or alkenoxy can be substituted by F;
Z 3 represents single bond, —COO—, —OCO—, —CH 2 O—, —OCH 2 — or —CH 2 CH 2 —;
L 3 and L 4 each independently represents —F, —Cl, —CN or —NCS; ring

represents

wherein one or more —CH 2 — in

can be replaced by —O—, one or more H on

can be substituted by halogen;
n1 represent 0, 1, 2 or 3, and when n1 is 2 or 3, ring

can be same or different, Z 3 can be same or different;
n2 represent 0 or 1.

6 . The liquid crystal composition according to claim 1 , wherein the liquid crystal composition further comprises at least one compound of general formula IV

in which,
R 7 and R 8 each independently represents H, C 1-12 alkyl or alkoxy, or C 2-12 alkenyl or alkenoxy;
ring

and ring

each independently represents

r represents 1, 2 or 3.

7 . The liquid crystal composition according to claim 6 , wherein the compound of general formula IV is selected from a group consisting of the following compounds:

in which, R 71 and R 81 each independently represents H, C 1-7 alkyl or alkoxy, or C 2-7 alkenyl or alkenoxy.

8 . The liquid crystal composition according to claim 6 , wherein the compound of general formula I provides 1 to 30% by weight of the total amount of the liquid crystal composition, the compound of general formula II provides 0.001 to 5% by weight of the total amount of the liquid crystal composition, the compound of general formula III provides 0 to 70% by weight of the total amount of the liquid crystal

Assignees

• Jiangsu Hecheng Display Tech

Inventors

• Ma Wenyang
• Wang Liwei
• Xu Haibin
• Han Wenming
• Zhang Wenqi

Classifications

• C09K2019/122

  Ph-Ph · CPC title

• C09K19/3003

  Compounds containing at least two rings in which the different rings are directly linked (covalent bond) · CPC title

• C09K2019/0448

  the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate · CPC title

• C09K2019/3009

  Cy-Ph · CPC title

• C09K2019/3016

  Cy-Ph-Ph · CPC title