Dichroic dye liquid crystal composition containing the dye, and

Details Dichroic dye liquid crystal composition containing the dye, and Dichroic dye liquid crystal composition containing the dye, and

1996-11-27

1999-03-02

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

2522991, 25229961, 25229966, 349182, C09K 1932, C09K 1900, C09K 1934, C09K 1912

Patent

active

058766278

ABSTRACT:
##STR1## wherein D.sup.1 and D.sup.2 each represents an optionally substituted phenyl group or an aromatic heterocyclic group; W represents a connecting group comprising a linear polycyclic aromatic group; X represents a group selected from the group consisting of --OCH.sub.2 --, --CH.sub.2 0--, --OOC--, --COO--, --CH.sub.2 NR--, and --NRCH.sub.2 --, where R represents a hydrogen atom or a methyl group; Z.sup.1 to Z.sup.12 each represents a hydrogen atom, a halogen atom, a methyl group, or a methoxy group, or Z.sup.2 and Z.sup.3, Z.sup.5 and Z.sup.6, Z.sup.8 and Z.sup.9, and Z.sup.11 and Z.sup.12 are bonded to each other to form an aliphatic ring, an aromatic ring, or a nitrogen-containing aromatic ring; and m and n each represents a number of 0 to 2. A liquid-crystal composition containing the above dye and a liquid-crystal element employing the composition are also disclosed.

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