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US 7,732,021 B2Granted
Liquid crystalline medium
AssigneeMerck Patent GmbH
InventorsAtsutaka Manabe, Elvira Montenegro, Detlef Pauluth
Life of this patent
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Abstract
The invention relates to liquid-crystalline compounds of the formula I and to a liquid-crystalline medium based on a mixture of polar compounds, characterised in that it comprises one or more compounds of the formula I in which R1, X, L1, L2 and L3 have the meanings indicated in Claim 1.
Claims20
Liquid-crystalline medium based on a mixture of polar compounds, comprising
- A) one or more compounds of formula I
- in which
- R1 denotes a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, in which optionally one or more CH2 groups are each, independently of one another, replaced by -⋄-, -⋄⋄-, —CH≡CH—, —O—, —CF2O—, —OCF2—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
- X denotes F, Cl, CN, SF5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical having up to 6 C atoms,
- L1 is F, and
- L2 and L3 are H, and
- B) one or more compounds of formula I*
- in which
- R1* and R2* each, independently of one another, denote alkyl, alkoxy, oxaalkyl, fluoroalkyl, alkenyloxy or alkenyl, each having up to 9 C atoms, and
- r* denotes 0 or 1.
7 more elements
A compound of formula I
- in which
- R1 denotes a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, in which optionally one or more CH2 groups are each, independently of one another, replaced by —CH≡CH—, —O—, —CF2O—, —OCF2—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
- X denotes F, Cl, CN, SF5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical having up to 6 C atoms,
- L1 is F, and
- L2 and L3 are H.
2 more elements
A compound of formula I-1, I-2, I-3, I-4, I-5, I-6, I-7, I-8, I-9 or I-10
- in which
- R1 denotes a halogenated or unsubstituted alkyl or alkoxy radical having 1 to 15 C atoms, in which optionally one or more CH2 groups are each, independently of one another, replaced by —CH≡CH—, —CH═CH—, —O—, —CF2O—, —OCF2—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another.
Dependencies are inferred from the claim text.