| 摘要 |
1531405 Liquid crystal compositions MERCK PATENT GmbH 12 Aug 1977 [14 Aug 1976] 33929/77 Heading C4X [Also in Division C2] A liquid crystalline dielectric comprises at least two liquid crystalline components, at least one of said components being a compound of the general formula wherein one of the symbols R 1 and R 2 is CN and the other is R, OR, OCOR or OCOOR in which R is (C 1 -C 12 ) alkyl. Further specified components which may be present are selected from azobenzenes, azoxybenzenes, biphenyls, Schiff bases, phenyl benzoates, optionally halogenated stilbenes, diphenyl-acetylene derivatives, diphenyl nitrones and substituted cinnamic acids. They are useful in the production of electro-optical indicator elements. |
