US 11,873,438 B2
Liquid-crystal medium
Rachel Tuffin, Chandlers Ford (GB); Matthias Bremer, Darmstadt (DE); and Marcus Reuter, Darmstadt (DE)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Appl. No. 17/415,833
Filed by MERCK PATENT GMBH, Darmstadt (DE)
PCT Filed Dec. 18, 2019, PCT No. PCT/EP2019/086015
§ 371(c)(1), (2) Date Jun. 18, 2021,
PCT Pub. No. WO2020/127528, PCT Pub. Date Jun. 25, 2020.
Claims priority of application No. 18214399 (EP), filed on Dec. 20, 2018; and application No. 19176694 (EP), filed on May 27, 2019.
Prior Publication US 2022/0081617 A1, Mar. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 19/34 (2006.01); C09K 19/54 (2006.01); G02F 1/137 (2006.01)
CPC C09K 19/3491 (2013.01) [C09K 19/542 (2013.01); C09K 2019/548 (2013.01); G02F 1/13712 (2021.01)] 13 Claims
 
1. A liquid-crystalline medium, comprising one or more compounds of formula IA

OG Complex Work Unit Chemistry
in which
R11 and R12 identically or differently, denote H, an alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH2 groups in these radicals are optionally replaced, independently of one another, by —C≡C—, —CF2O—, —OCF2—, —CH═CH—,

OG Complex Work Unit Chemistry
—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,
one or more compounds of formula BS

OG Complex Work Unit Chemistry
in which
alkyl and alkyl* identically or differently, denote alkyl having 1 to 7 C atoms, in which one or more CH2 groups may be replaced by

OG Complex Work Unit Chemistry
and
one or more compounds selected from the group of the compounds of the formulae T-1 to T-21,

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry
in which
R denotes a straight-chain alkyl or alkoxy radical having 1 to 6 C atoms,
(O) denotes —O— or a single bond,
m is 0, 1, 2, 3, 4, 5 or 6 and
n is 0, 1, 2, 3 or 4.