Process and intermediates for preparing fiber-reactive phthalocyanine dyes

US4204056A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Rolf Muller · Karben, DE
• Joachim Ribka · Offenbach am Main, DE

Key dates

• Filing date: Sep 21, 1978
• Grant date: May 20, 1980
• Expiry date: Sep 21, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B56/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Process for preparing fiber-reactive water-soluble phthalocyanine azo dyes, using the following conversion stages ##STR1## followed by the diazonium coupling of the fiber-reactive group to the pyrazole ring. The novel intermediates are desirable products.