Copper complexes of sulpho groups containing disazo dyestuffs

US5233027A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rolf Hinrichs · Hamburg, DE
• Klaus Kunde · Dessau, DE

Key dates

• Filing date: May 23, 1991
• Grant date: Aug 3, 1993
• Expiry date: May 23, 2011

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/919
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The new disazo dyestuffs of the formula (I) ##STR1## in which the substituents and indices have the meaning given in the description, and salts thereof are outstandingly suitable for dyeing cellulose-containing materials and leather in blue shades having good wet- and light-fastnesses.