Alkali-clearable azo disperse dyes containing fluorosulfonyl group and preparing method thereof and dyeing method thereby

摘要

PURPOSE: Provided are an azo-based alkali-clearable disperse dye containing fluorosulfone, which has clearing ability under a weak alkali condition after dyeing polyester fiber material, and a method for dyeing the polyester fiber material by using the alkali-clearable dispersing dye, which can omit a reduction clearing process. CONSTITUTION: The azo-based alkali-clearable disperse dye containing the fluorosulfone is an azobenzene-based monoazo compound(formula I) and is produced by coupling-reacting a diazonium salt(formula II) of an aromatic amine compound with an aromatic aniline-substituted monoazo intermediate compound (formula III) as a coupling component, wherein X1, X2, and X3 are hydrogen, nitro, chloro, bromo, or cyano, Y1 and Y2 are hydrogen, methyl, methoxy, or acetylamino, and R1 and R2 are substituted or unsubstituted alkyl. And the method for dyeing the polyester fiber material uses the disperse dye(formula I) and performs an alkali clearing instead of the reduction clearing.