	US 12,215,267 B2
	Liquid crystalline medium and electro-optical device
Matthias Bremer, Darmstadt (DE); Atsutaka Manabe, Darmstadt (DE); and Martin Kraska, Darmstadt (DE)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 18/039,870
Filed by MERCK PATENT GMBH, Darmstadt (DE)
PCT Filed Nov. 30, 2021, PCT No. PCT/EP2021/083540 § 371(c)(1), (2) Date Jun. 1, 2023, PCT Pub. No. WO2022/117551, PCT Pub. Date Jun. 9, 2022.
Claims priority of application No. 20211314 (EP), filed on Dec. 2, 2020; application No. 21173651 (EP), filed on May 12, 2021; and application No. 21189410 (EP), filed on Aug. 3, 2021.
Prior Publication US 2024/0052242 A1, Feb. 15, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1333 (2006.01); C09K 19/02 (2006.01); C09K 19/20 (2006.01); C09K 19/30 (2006.01); C09K 19/34 (2006.01); C09K 19/04 (2006.01); C09K 19/12 (2006.01)

CPC C09K 19/2007 (2013.01) [C09K 19/0225 (2013.01); C09K 19/3098 (2013.01); C09K 19/3402 (2013.01); C09K 19/3458 (2013.01); C09K 2019/0466 (2013.01); C09K 2019/123 (2013.01); C09K 2019/2035 (2013.01); C09K 2019/2042 (2013.01); C09K 2019/3422 (2013.01)]

17 Claims

1. A liquid crystalline medium comprising 80% by weight or more of one or more compounds selected from the group of compounds of formulae IA, IB and IC,

in which

X^1A, X^1Band X^1Cindependently of each other denote —F, —OCF₃, —Cl, —NCS, or —CN,

Z^1A, Z^1Band Z^1Cindependently of each other denote —(C═O)—O— or —CF₂—O—,

L^1A, L^1Band L^1Cindependently of each other denote H or CH₃,

A^1Adenotes

A^1Bdenotes

A^1Cdenotes

R^1A, R^1Band R^1Cindependently of one another denote an alkyl radical having 1 to 15 C atoms, in which one or more CH₂groups may in each case be replaced, independently of one another, by —C═C—, —CF₂O—, —OCF₂—, —CH═CH—,

—O—, —S—, —CO—O— or —O—CO— in such a way that O/S atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen, or denotes H.