Derivatives of hydroxynaphthalenecarboxylic acid and azo colorants made therefrom

摘要

A coupling component for use in the synthesis of azo colorants, selected from compounds having the formula: I II wherein R1 is Y or arylene-(Y)n, where n is an integer from 1-4; R2 is H, C1-C8 alkyl, C3-C8 cycloalkyl, aryl, or Y; provided that if R1 is arylene-(Y)n, then R2 is not aryl; R3 is C1-C4 alkyl, C1-C4 alkoxy, SO3H, Br, Cl, OH, or NO2 and m is an integer from 0-3; and Y is a poly(oxyalkylene) substituent having from 4-200 oxyalkylene units which are the addition products of compounds selected from the group consisting of ethylene oxide and propylene oxide.