Liquid-crystalline medium and high-frequency components comprising same

摘要

The present invention relates to liquid-crystalline media comprising
one or more compounds selected from the group of compounds of formulae I, II and III,;
in which the parameters R1-R3, Z21, Z31, Z32 and rings A11, A12, A13, A21, A22, A31, and A32 are as defined herein, and to components comprising these media for high-frequency technology, in particular phase shifters and microwave array antennas.

主权项

1. A liquid-crystal medium comprising:
one or more compounds selected from formula III-1in which
R3 denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms, and  independently of one another, denotealternatively independently denotes eand
optionally one or more compounds selected from formulae I and IIin which
R1 denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms, n denotes 0 or 1, and  independently of one another, denote  alternatively denotesin which
R2 denotes H, unfluorinated alkyl or unfluorinated alkoxy having 1 to 17 C atoms or unfluorinated alkenyl, unfluorinated alkenyloxy or unfluorinated alkoxyalkyl having 2 to 15 C atoms, Z21 denotes trans-CH═CH—, trans-CF═CF— or —C≡C—, and independently of one another, denote and
optionally one or more polymerizable compounds.