P-Sulphophenoxy-phenylazo indoles

US4248774A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Herbert Hugl
• Gerhard Wolfrum · Waldershof, DE

Key dates

• Filing date: Apr 3, 1978
• Grant date: Feb 3, 1981
• Expiry date: Apr 3, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B29/3613
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Synthetic fibre materials, especially polyester fibres, are dyed in yellowish to orange-red shades with good fastness to light and washing if dyestuffs of the formula ##STR1## wherein K denotes the radical of a coupling component of the indole series, PA1 R denotes alkyl, cycloalkyl, aralkyl or aryl and the ring A can contain further non-ionic substituents which are customary in dyestuff chemistry, are used for dyeing.