Navy blue reactive dye and preparation method thereof

The invention discloses a navy blue reactive dye and a preparation method thereof. The structural formula of the navy blue reactive dye is shown in the formula (I): in the formula (I), R1 is-OH, R2 is-NH2; R3 and R4 are independently selected from the specification, where X is selected from-SO2CH2CH2OSO3M or-SO2CH=CH2, Y is selected from-SO3M or-OCH3, Z is selected from-CH3 or-OCH3, and M is selected from H or an alkali metal. The navy blue reactive dye has the advantages of high fixation rate and dye uptake, and good dye fastness. 本发明公开了一种藏青色活性染料及其制备方法。藏青色活性染料的结构式如(I)所示：式(I)中R为-OH，R为-NH；R，R分别独立选自其中X选自-SOCHCHOSOM或-SOCH＝CH，Y选自-SOM或-OCH，Z选自-CH或-OCH，M选自H或碱金属。本发明的藏青色活性染料具有固色率和上染率高，且具有较好的染色牢度的优点。