Liquid crystal medium, useful as a component in high frequency technology, preferably microwave array antennas and phase shifters, comprises a combination of cycloaryl compounds and optionally further compounds

摘要

Liquid crystal medium comprises at least a combination of cycloaryl compounds (I) and (II), or (I) and a cycloaryl compound of formula (III), or (II) and (III), or (I), (II) and (III); and optionally one or more further compounds. Liquid crystal medium comprises at least a combination of cycloaryl compounds of formula (I) and (II), or (I) and at least a cycloaryl compound of formula (III), or (II) and (III), or (I), (II) and (III); and optionally one or more further compounds. L 1 1R 1 1or X 1 1; L 1 2R 1 2or X 1 2; R 1 1, R 1 2H, unfluorinated 1-15C-alkyl, unfluorinated 1-15C-alkoxy, unfluorinated 2-15C-alkenyl, unfluorinated 2-15C-alkenyloxy or unfluorinated 2-15C-alkoxyalkyl; X 1 1, X 1 2H, F, Cl, CN, NCS, SF 5, fluorinated 1-7C-alkyl, fluorinated 1-7C-alkoxy, fluorinated 2-7C-alkenyl, unfluorinated 2-7C-alkenyloxy or unfluorinated 2-7C-alkoxyalkyl; ring A 1 1-ring A 1 3, ring A 2 1-ring A 2 3, ring A 3 1-ring A 3 4benzen-1,4-yl, 2-fluoro-benzen-1,4-yl, 2,3-difluoro-benzen-1,4-yl, 1,3-difluoro-benzen-2,5-yl, or 2,5-difluoro-benzen-1,4-yl; L 2 1R 2 1or X 2 1(when Z 2 1and/or Z 2 2is trans CH=CH or trans CF=CF); L 2 2R 2 2or X 2 2(when Z 2 1and/or Z 2 2is trans CH=CH or trans CF=CF); R 2 1, R 2 2H, unfluorinated 1-17C, preferably 3-10C-alkyl, unfluorinated 1-17C, preferably 3-10C-alkoxy, unfluorinated 2-15C-preferably 3-10C-alkenyl, optionally fluorinated 2-15C-preferably 3-10C-alkenyloxy or optionally fluorinated 2-15C-preferably 3-10C-alkoxyalkyl; X 2 1, X 2 2F, Cl, CN, NCS, SF 5, fluorinated 1-17C-alkyl, fluorinated 1-17C-alkoxy, fluorinated 2-7C-alkenyl, fluorinated 2-7C-alkenyloxy or fluorinated 2-7C-alkoxyalkyl; Z 2 1, Z 2 2, Z 3 1-Z 3 3trans-CH=CH-, trans-CF=CF-, -C-C-, trans-CH=CH-, trans-CF=CF- or a single bond; L 3 1R 3 1or X 3 1; L 3 2R 3 1or X 3 2; R 3 1, R 3 2H, unfluorinated 1-17C-alkyl, unfluorinated 1-17C-alkoxy, unfluorinated 2-15C-alkenyl, 2-15C-alkenyloxy or 2-15C-alkoxyalkyl; and X 3 1, X 3 2H, F, Cl, CN, NCS, SF 5, fluorinated 1-17C-alkyl, fluorinated 1-17C-alkoxy, fluorinated 2-7C-alkenyl, optionally fluorinated 2-7C-alkenyloxy or optionally fluorinated 2-7C-alkoxyalkyl. An independent claim is included for the preparation of the liquid crystal medium comprising mixing (I)-(III) with optionally further connections and/or additives. [Image]