Benzoisothiazole azo dyestuffs

US4681932A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Winfried Kruckenberg · Leverkusen, DE
• Klaus Leverenz · Leverkusen, DE
• Hans Otten · London, CA

Key dates

• Filing date: Jun 27, 1985
• Grant date: Jul 21, 1987
• Expiry date: Jun 27, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/922
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Azo dyestuffs of the formula ##STR1## wherein R.sub.1 denotes hydrogen, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.4 -alkoxyethoxy and PA0 X denotes acyl, are distinguished by good levelling properties and good allround fastness properties. They dye polyester fibres in a bright blue shade.