Optionally substituted sulfophenyl-azo-naphthylene-azo-para-alkoxyphenyl dyes

Abstract

Compounds of the formula ##STR1## wherein A is 1,4-naphthylene, substituted 1,4-naphthylene, 1,4-(5,6,7,8-tetrahydronaphthylene) or substituted 1,4-(5,6,7,8-tetrahydronaphthylene), Wherein each substituent of substituted 1,4-naphthylene and substituted 1,4-(5,6,7,8-tetrahydronaphthylene) is independently lower alkyl, lower alkoxy or halo, D is sulfophenyl or substituted sulfophenyl wherein each substituent is independently lower alkyl, lower alkoxy, nitro or halo, Each R is independently lower alkyl, and n is 0 to 2, And mixtures thereof, Are useful for dyeing and printing natural polyamides such as wool and silk, synthetic polyamides such as nylon, polyacrylonitrile, acrylonitrile copolymers and polyvinyl alcohol on which they build-up well. The dyeings are fast to light and wet treatments.

Dependencies are inferred from the claim text.