WATER-SOLUBLE MONOAZO COLORING MATTER AND DYEING METHOD USING SAID COLORING MATTER

摘要

NEW MATERIAL:A compound in the form of a free acid expressed by formula I [R1 is H or methyl; R2 and R4 are H or (substituted) lower alkyl; R3 and R5 are H, lower alkyl, lower alkoxy or halogen, provided that R3 and R4 are not H when R2 is H or methyl; Y is -CH=CH2 or -CH2CH2OSO3H]. EXAMPLE:A compound expressed by formula II. USE:A dye, capable of dyeing cellulose and nitrogen-containing fibers to a bluish red color and suitable for dyeing by a dip dyeing or cold pad batch method. PREPARATION:For example, 1-hydroxy-3,6-disulfo-8-aminonaphthalene is successively condensed with cyanuric chloride and an aniline compound expressed by formula III in an aqueous medium to give a compound expressed by formula IV, which is then condensed with a compound expressed by formula V to synthesize a coupling component expressed by formula VI. On the other hand, a compound expressed by formula VII is diazotized and coupled with the compound expressed by formula VI.