Dichroic azo-azomethine dyes for liquid crystal compositions

US12122919B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Leonhard Feiler · Givisiez, CH
• Thomas Ruch · Delémont, CH
• Frank Bachmann · Glückstadt, DE
• Marie-Pascale Perritaz · Basel, CH
• Gerardus De Keyzer · Riehen, CH

Key dates

• Filing date: Jan 17, 2020
• Grant date: Oct 22, 2024
• Expiry date: May 16, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K19/601
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo-azomethine dyes, a dichroic dye mixture including azo-azomethine dyes, a liquid crystal composition with the azo-azomethine dyes, and methods for producing the dyes and dye compositions. The dyes can be used in liquid crystal systems, transmissive displays, and smart windows.