Cationic thiadiazole dyestuffs

US5580964A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Uwe Claussen · Leverkusen, DE
• Werner Hartwich
• Peter Wild · Odenthal, DE

Key dates

• Filing date: Mar 23, 1995
• Grant date: Dec 3, 1996
• Expiry date: Mar 23, 2015

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B5/3033
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Cationic 1,3,4-thiadiazole dyestuffs of the formula ##STR1## in which the symbols used have the meaning given in the description, corresponding anhydrobases, processes for the preparation of the cationic 1,3,4-thiadiazole dyestuffs, their use for dyeing and printing various materials and as dichroic dyestuffs in polarizing films, and various materials which comprise such dyestuffs.