Copper complex formazan compounds, process for their manufacture and their use as dyestuffs

US4336190A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Gunther Schwaiger · Frankfurt, DE
• Ernst Hoyer · Frankfurt am Main, DE

Key dates

• Filing date: Nov 7, 1980
• Grant date: Jun 22, 1982
• Expiry date: Nov 7, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S8/918
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

This invention relates to novel copper complex formazan compounds of the formula ##STR1## in which M is hydrogen or the equivalent of a metal and R is hydrogen or chlorine. The invention also relates to a process for their manufacture. The compounds can be used as dyestuffs, in particular fiber reactive dyestuffs for dyeing cellulose fiber materials, wool, or synthetic polyamide fiber materials for example, on which they exhibit intense blue dyeings having good fastness properties.