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US 8,551,359 B2Granted
Liquid-crystalline compounds and liquid-crystalline media
AssigneeMerck Patent GmbH
InventorsAxel Jansen, Helmut Haensel, Malgorzata Rillich
Life of this patent
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Abstract
The present invention relates to liquid-crystalline compounds having two fluorinated biphenyl units, a terminal trifluoromethyl or trifluoromethoxy group and a —CF2O— bridge between the two fluorinated biphenyl units. The invention also relates to liquid-crystalline media prepared therewith and to liquid-crystal display devices (LC displays) containing these media.
Claims20
A compound of formula I
- in which
- L1 denotes H or F,
- R1 denotes an unsubstituted alkyl radical having 1 to 15 C atoms, in which one or more CH2 groups are each optionally replaced, independently of one another, by —C≡C—, —CH═CH—, —CF═CF—, —CF═CH—, —CH═CF—, —(CO)O—, —O(CO)—, —(CO)— or —O— in such a way that O atoms are not linked directly to one another,
- and
- R2 denotes CF3 or OCF3.
2 more elements
Dependencies are inferred from the claim text.