Liquid crystal medium and high-frequency components comprising same

Patent metadata

Field	Value
Publication number	US-9493703-B2
Application number	US-201214347784-A
Country	US
Kind code	B2
Filing date	Sep 7, 2012
Priority date	Sep 27, 2011
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

The present invention relates to liquid crystal media and to high-frequency components comprising same, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, in particular for microwave phased-array antennas.

First claim

The invention claimed is:

1. A liquid crystal medium, comprising three or more compounds of formula I

wherein
R 11 denotes C n H 2n+1 or CH 2 ═CH—(CH 2 ) Z , and
R 12 denotes C m H 2m+1 , O—C m H 2m+1 or (CH 2 ) Z —CH═CH 2 ,

n and m, independently of one another, denote an integer in the range from 1 to 9 and
z denotes 0, 1, 2, 3 or 4,
in a total concentration of ≧95% and wherein three of the compounds of formula I are:
48 to 65% of a compound of formula Ia

a compound of formula Ib

and
a compound of formula Ic

2. The liquid crystal medium according to claim 1 , consisting of three or more compounds of formula I.

3. The liquid crystal medium according to claim 1 , additionally comprising one or more compounds of formula IIa to IId

wherein
R 21 has the meaning of R 11 and R 12 given in formula I.

4. The liquid crystal medium according to claim 1 , additionally comprising one or more compounds of formula III-1a

wherein
R 31 has the meaning of R 11 and R 12 given in formula I, and
X 32 denotes H, F, Cl, —CN, —NCS, —SF 5 , fluorinated alkyl or fluorinated alkoxy having 1 to 7 C atoms or fluorinated alkenyl, unfluorinated or fluorinated alkenyloxy or unfluorinated or fluorinated alkoxyalkyl having 2 to 7 C atoms.

5. The liquid crystal medium according to claim 1 , additionally comprising one or more compounds of formulae IV

wherein
R 41 to R 43 independently of one another, denote unfluorinated alkyl or unfluorinated alkoxy, each having 1 to 15 C atoms, unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl, each having 2 to 15 C atoms, or cycloalkyl, alkylcycloalkyl, cycloalkenyl, alkylcycloalkenyl, alkylcycloalkylalkyl or alkylcycloalkenylalkyl, each having up to 15 C atoms.

6. The liquid crystal medium according to claim 1 , additionally comprising one or more compounds of formulae V

wherein
R 51 and R 52 independently of one another, denote F or Cl, unfluorinated alkyl or fluorinated alkyl or unfluorinated alkoxy or fluorinated alkoxy, each having 1 to 15 C atoms, or unfluorinated alkenyl or fluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl or fluorinated alkoxyalkyl, each having 2 to 15 C atoms, in which, in addition, one or more “—CH 2 —” groups may be replaced, independently of one another, by cycloalkyl having 3 to 6 C atoms, or one of R 51 and R 52 or both R 51 and R 52 denote H,
L 51 to L 54 on each appearance, in each case independently of one another, denote H, alkyl having 1 to 15 C atoms, F or Cl, and
i denotes an integer in the range from 5 to 15.

7. A high-frequency technology component, comprising a liquid crystal medium according to claim 1 .

8. The component according to claim 7 , suitable for operation in the microwave range.

9. The component according to claim 8 , that is a phase shifter.

10. A microwave device, comprising one or more components according to claim 7 .

Assignees

• Manabe Atsutaka
• Jasper Christian
• Reiffenrath Volker
• Brocke Constanze
• Pauluth Detlef
• Klass Dagmar
• Merck Patent Gmbh

Inventors

• Manabe Atsutaka
• Jasper Christian
• Reiffenrath Volker
• Brocke Constanze
• Pauluth Detlef
• Klass Dagmar

Classifications

• C09K19/18 Primary

  the chain containing carbon-to-carbon triple bonds, e.g. tolans · CPC title

• C09K2019/3025

  Cy-Ph-Ph-Ph · CPC title

• C09K19/44

  containing compounds with benzene rings directly linked · CPC title

• C09K2019/123

  Ph-Ph-Ph · CPC title

• C09K2219/11

  used in the High Frequency technical field · CPC title