Disazo pigments derived from 3,8-diamino-phenanthridone-(10)

US4082741A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Klaus Hunger · Kelkheim, DE
• Dieter Weber · Leonberg, DE

Key dates

• Filing date: Dec 16, 1976
• Grant date: Apr 4, 1978
• Expiry date: Dec 16, 1996

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B35/34
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The compounds obtained by bis-diazotizing 3,8-diamino-phenanthridone-(10) and coupling it onto one or a mixture of enolizable ketomethylene coupling components having no solubilizing groups are pigments of high tinctorial strength and fastness to migration, heat, light and chemicals.