REACTIVE DYES FOR POLYAMIDE FIBER AND ITS MANUFACTURING METHOD

摘要

A novel reactive dye for dyeing polyamide fiber, and a method for preparing the reactive dye are provided to improve the purity of a dye by lowering water solubility and to enhance fixation, dyeing uniformity and washing fastness. A reactive dye is represented by the formula I, wherein A1 and A2 are independently H, a methyl A reactive dye, a methoxy group, Br, Cl, a cyano group, a nitro group, a hydroxysulfonyl group, a C1-C2 alkyl sulfonyl group or a vinyl sulfonyl group; L is an amino group or an azo group; and D is a dye mother material represented by the formula VIII, IX or X. In the formula VIII, R1 is H, a C1-C2 alkyl group, an acetyl group, a benzyl group or a benzoyl group; and M is H or an alkali metal. In the formula IX, R3 is a methyl group or a hydroxycarbonyl group; X1 and X2 is H or Cl; and M is H or an alkali metal.