Liquid crystal 2,3-dicyano-hydroquinone derivatives
AssigneeChisso Corporation
InventorsTakashi Inukai, Hiromichi Inoue, Kenji Furukawa, Hideo Sato, Shigeru Sugimori
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Abstract
Liquid crystal materials for liquid crystal display, having a large negative dielectric anisotropy and maintaining a liquid crystal state at a broad temperature range including room temperature are provided. These materials contain novel compounds expressed by the general formula (I) ##STR1## wherein X represents ##STR2## Y represents ##STR3## R.sup.1 and R.sup.3 each represent an alkyl group or an alkyloxy group of 1-10 carbon atoms; R.sup.2 and R.sup.4 each represent an alkyl group of 1-10 carbon atoms; but compounds wherein ##STR4## are excluded.
Claims10
Compounds expressed by the general formula (I) ##STR42## R.sup.1 and R.sup.3 each represent an alkyl group or an alkyloxy group of 1-10 carbon atoms;
- and
- R.sup.4 represents an alkyl group of 1-10 carbon atoms.
Dependencies are inferred from the claim text.