Water-soluble phenylazoaminonaphthol sulphonic acid dyestuffs

US4218373A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Wolfrum · Waldershof, DE
• Erich Klauke
• Hans Otten · London, CA

Key dates

• Filing date: Jun 21, 1978
• Grant date: Aug 19, 1980
• Expiry date: Jun 21, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B43/24
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A water-soluble monoazo dyestuff which, in the form of the free acid, corresponds to the formula ##STR1## wherein R.sub.1 denotes alkyl which can be mono-substituted by chlorine, hydroxyl, C.sub.1 to C.sub.4 alkoxy, cyano, phenyl or tolyl, cyclohexyl which can be optionally substituted by C.sub.1 -C.sub.4 alkyl, phenyl, C.sub.1 -C.sub.4 -alkyl phenyl, chlorophenyl, bromophenyl, trifluoromethylphenyl or naphthyl, alkenyl or benzenesulphonyl which can be substituted by fluorine, chlorine, bromine, trifluoromethyl, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, PA1 R.sub.2 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl which can be substituted by hydroxyl, cyano, formylamino, C.sub.1 -C.sub.4 alkylcarbonylamino or benzoylamino which in turn can be substituted by methyl, chlorine, bromine or trifluoromethyl; cyclohexyl or phenyl which can be substituted by C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 -alkoxy, chlorine, bromine or trifluoromethyl and PA1 R.sub.3 denotes hydrogen or C.sub.1 -C.sub.4 -alkyl and a process for the preparation of such water-soluble mono-azo dyestuff. The dyestuffs according to the invention are suitable for dyeing natural and synthetic fibre materials, for exam…