Process for the preparation of dyestuff compositions

US4061464A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Manfred Hahnke · Kelkheim, DE
• Kurt Hohmann · Ybbs an der Donau, AT
• Theodor Papenfuhs · Frankfurt, DE

Key dates

• Filing date: Oct 7, 1975
• Grant date: Dec 6, 1977
• Expiry date: Oct 7, 1995

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B67/0071
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of new dyestuff compositions which contain one or more basic dyestuffs in the form of dyestuff bases from the series of the triarylmethane, indoldiarylmethane, azine, oxazine, thiazine or xanthene dyestuffs or one or more basic dyestuffs of the series of the azo, anthraquinone, phthalocyanine, styryl, quinophthalone, benzoxanthene, naphthoylene-benzimidazole, naphthalimide or nitro series, carrying a primary, secondary or tertiary amino group or a guanidino or hydrazino group, as well as one or more non-ionic or slightly cationic surface-active agents and, optionally, water and/or an organic solvent miscible with water, which process comprises synthesizing the dyestuff in the surface-active agent optionally containing water and/or an organic solvent miscible with water, and then adding, if necessary, water and/or a solvent miscible with water and a further surface-active agent, this process of the invention having the advantage that an intermediate isolation, drying or grinding of the dyestuffs contained in the dyestuff compositions defined above is not necessary, so that the dyestuffs need not be introduced as substance into the surface-active agent a…