Water-soluble azo compounds, a process for their preparation and their use as dyes

US4492654A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Ernst Hoyer · Frankfurt am Main, DE
• Folker Kohlhaas · Hochheim, DE
• Fritz Meininger

Key dates

• Filing date: Jul 20, 1983
• Grant date: Jan 8, 1985
• Expiry date: Jul 20, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B62/513
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disazo compounds corresponding to the general formula (1) ##STR1## as well as their metal salts, in which D.sub.1 denotes the benzene or naphthalene nucleus, which can be further substituted by one or two substituents from the group of fluorine, chlorine, bromine, carboxy, lower alkyl, lower alkoxy and nitro and/or one, two or three sulfo groups, D.sub.2 is the benzene or naphthalene nucleus, which is substituted by the substituent X defined below and, in addition to the group --SO.sub.2 --Y, can be further substituted by one or two substituents from the group of carboxy, lower alkyl and lower alkoxy and/or by one substituent from the group of fluorine, chlorine, bromine and nitro and/or one, two or three sulfo groups, X denotes a fluorine, chlorine or bromine atom, which is necessarily bonded to D.sub.2 in ortho-position to the azo group, Y denotes the vinyl, .beta.-sulfatoethyl, .beta.-chloroethyl, .beta.-thiosulfatoethyl or a .beta.-acyloxyethyl group with the acyl radical of a lower alkanecarboxylic acid or of a benzoic acid or of a benzenesulfonic acid, and a and b each represent the number zero or 1, the sum of (a+b) being equal to 1 or 2. These compounds (1) are very suitabl…