Polycyclic dyestuffs

US4024144A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Groll · Leverkusen, DE
• Volker Hederich
• Hans-Samuel Bien

Key dates

• Filing date: May 19, 1975
• Grant date: May 17, 1977
• Expiry date: May 19, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B57/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Polycyclic dyestuffs free from sulphonic acid groups of the formula ##STR1## in which A denotes an arylene radical and PA1 B--so.sub.2 --or denotes an arylene radical substituted by an aryloxysulphonyl group, Are suitable for dyeing organic materials, especially for dyeing and printing hydrophobic fibre materials and for bulk-dyeing synthetic materials.