Dichroic dye composition

US11939512B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Michael Junge · Munich, DE
• Ewa Ptak · Weiterstadt, DE
• Christoph Wetzel · Ehingen, DE

Key dates

• Filing date: Nov 21, 2019
• Grant date: Mar 26, 2024
• Expiry date: Nov 21, 2039

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3422
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to compositions comprising a combination of benzothiadiazole and thiadiazoloquinoxaline derivatives, to liquid-crystalline media containing the compositions, and to the use of the compositions and the media in optical, electronic and electro-optical devices, in particular in devices for regulating the passage of energy from an outside space into an inside space, for example in switchable windows.