US 12,305,103 B2
Liquid-crystal medium
Harald Hirschmann, Darmstadt (DE); and Ewgenij Wakaresko, Darmstadt (DE)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Filed by MERCK PATENT GMBH, Darmstadt (DE)
Filed on Jan. 6, 2021, as Appl. No. 17/142,835.
Claims priority of application No. 20150435 (EP), filed on Jan. 7, 2020.
Prior Publication US 2021/0222067 A1, Jul. 22, 2021
Int. Cl. G02F 1/1333 (2006.01); C09K 19/06 (2006.01); C09K 19/30 (2006.01); C09K 19/34 (2006.01); C09K 19/04 (2006.01)
CPC C09K 19/3405 (2013.01) [C09K 19/065 (2013.01); C09K 19/3003 (2013.01); C09K 19/3028 (2013.01); C09K 19/3491 (2013.01); C09K 2019/0466 (2013.01); C09K 2019/301 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3037 (2013.01); C09K 2019/3408 (2013.01)] 13 Claims
 
1. A liquid crystal (LC) medium having negative dielectric anisotropy and comprising
one or more compounds of formula C1 and one or more compounds of formula G

OG Complex Work Unit Chemistry
in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meanings:

OG Complex Work Unit Chemistry
denotes

OG Complex Work Unit Chemistry
R0, R1 and R2 denote a straight chain alkyl or alkoxy radical having 1 to 15 C atoms or a branched alkyl or alkoxy radical having 3 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another, by

OG Complex Work Unit Chemistry
—C≡C-, —CF2O-, —OCF2-, —CH═CH—, —O—, —CO—O— or —O-CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen
X0 denotes F, CI, CN, SF5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical having 1 to 6 C atoms, and
Z0 denotes a single bond, —C2H4-, —CH2O-, —CF2O-, or —CH═CH-;
and
one or more compounds selected from formulae ZK and DK

OG Complex Work Unit Chemistry
in which the individual radicals on each occurrence, identically or differently, have the following meanings:

OG Complex Work Unit Chemistry
denotes

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry
denotes

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry
denotes

OG Complex Work Unit Chemistry
and
R3 and R4 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH-CH—, —CO—, —O—CO— or —CO—O— in such a way that O atoms are not linked directly to one another,
Zy denotes —CH2CH2-, —CH═CH—, —CF2O-, —OCF2-, —CH2O—, —OCH2-, —COO—, —OCO-, —C2F4-, —CF═CF— or a single bond,
R5 and R6 each, independently of one another, denote alkyl having 1 to 12 C atoms, in which one or two non-adjacent CH2 groups may be replaced by —O—, —CH═CH—, —CO—, —OCO— or —COO— in such a way that O atoms are not linked directly to one another, and
e denotes 1 or 2.