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EP0144020A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Azodyes and liquid crystalline materials containing these dyes

Assignee: BASF SE
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Filing: 1984-11-14
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Granted: —
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Expires: 2004-11-14
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Abstract

Abstract Translated from German Die Erfindung betrifft Verbindungen der allgemeinen Formel I <IMAGE> in der R¹ und R² unabhängig voneinander C6- bis C24-Alkyl oder gegebenenfalls durch Alkyl oder Cycloalkyl substituiertes Benzyl, einer der Reste auch Wasserstoff sind und die Ringe A, B, C und D noch durch Chlor, Methyl oder Methoxy substituiert sein können, wobei die Verbindung der Formel <IMAGE> ausgenommen ist. Die erfindungsgemäßen Verbindungen eignen sich als Farbstoffe in elektro-optischen Flüssigkristallanzeigen oder zur Herstellung von Polarisationsfolien. The invention relates to compounds of the general formula I <IMAGE> in which R¹ and R² independently of one another are C6- to C24-alkyl or optionally substituted by alkyl or cycloalkyl, one of the radicals are also hydrogen and the rings A, B, C and D still can be substituted by chlorine, methyl or methoxy, with the exception of the compound of the formula <IMAGE>. The compounds according to the invention are suitable as dyes in electro-optical liquid crystal displays or for the production of polarizing films.

Inventors

  • 👤 Karl-Heinz Dr. Etzbach
  • 👤 Werner Dr. Juenemann
  • 👤 Johannes Dr. Dehnert

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 11:55
CPC Classifications
C; C09; C09K; C09K19/00; C09K19/52; C09K19/60; C09K19/601; C09B; C09B35/00; C09B35/35

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