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EP0110205A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Coloured liquid crystal mixtures containing phenyl ethanes

Assignee: F Hoffmann La Roche AG
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Filing: 1983-11-09
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Granted: —
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Expires: 2003-11-09
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Abstract

Abstract Translated from German Ein flüssigkristallines Gemisch, enthaltend Verbindungen der Formel worin R' Alkyl, Alkoxy, p-Alkylphenyl, p-Alkoxyphenyl, trans-4-Alkylcyclohexyl, 4'-Alkyl-4-biphenylyl, p-(trans-4-Al- kylcyclohexyl)phenyl, 2-(trans-4-Alkylcyclohexyl)äthyl oder p-[2-(trans-4-Alkylcyclohexyl)äthyl]phenyl und R 2 trans-4-Alkylcyclohexyl bedeuten, oder R' trans-4-Alkylcyclohexyl und R 2 p-(trans-4-Alkylcyclohexyl)phenyl, p-[2-(trans-4-Al- kylcyclohexyl)äthyl]phenyl oder 4'-(trans-4-Alkylcyclohe- xyl)-4-biphenylyl bedeuten, oder R' p-Alkylphenyl und R 2 p-[2-(trans-4-Alkylcyclohexyl)äthyl]phenyl bedeuten, und Farbstoffe der Formeln worin R 3 geradkettiges C 1 -C 12 -Alkyl und R 4 geradkettiges C 1 -C 4 -Alkyl darstellen, Z' Wasserstoff oder Chlor bezeichnet, eine der Gruppen Z 2 , Z 3 und Z 4 Chlor und die beiden ändern Wasserstoff bedeuten, und Y' Wasserstoff, Y 2 Amino und Y 3 Methyl bezeichnen oder Y' Hydroxy und Y 2 und Y 3 Wasserstoff bezeichnen, sowie dessen Verwendung für elektro-optische Zwecke werden beschrieben. A liquid crystalline mixture containing compounds of the formula wherein R 'is alkyl, alkoxy, p-alkylphenyl, p-alkoxyphenyl, trans-4-alkylcyclohexyl, 4'-alkyl-4-biphenylyl, p- (trans-4-alkylcyclohexyl) phenyl, 2- (trans-4- Alkylcyclohexyl) ethyl or p- [2- (trans-4-alkylcyclohexyl) ethyl] phenyl and R 2 signify trans-4-alkylcyclohexyl, or R 'trans-4-alkylcyclohexyl and R 2 p- (trans-4-alkylcyclohexyl) phenyl , p- [2- (trans-4-alkylcyclohexyl) ethyl] phenyl or 4 '- (trans-4-alkylcyclohexyl) -4-biphenylyl, or R' p-alkylphenyl and R 2 p- [2 - (Trans-4-alkylcyclohexyl) ethyl] phenyl, and dyes of the formulas in which R 3 represents straight-chain C 1 -C 12 alkyl and R 4 represents straight-chain C 1 -C 4 alkyl, Z 'denotes hydrogen or chlorine, one of the groups Z 2 , Z 3 and Z 4 denotes chlorine and the two other groups represent hydrogen, and Y 'denote hydrogen, Y 2 amino and Y 3 denote methyl or Y' hydroxy and Y 2 and Y 3 denote hydrogen, and their use for electro-optical purposes are described.

Inventors

  • 👤 Arthur Dr. Boller
  • 👤 Martin Dr. Petrzilka
  • 👤 Alfred Germann
  • 👤 Martin Dr. Schadt

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-28 11:14
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/60; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/22; C09B1/50; C09B1/503; C09B29/00; C09B35/00; C09B35/02; C09B35/039; C09B35/04; C09K19/04; C09K19/06

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