Active green dye

[0044] Example 1

[0045] 38.3 parts of 2-naphthylamine-3,6,8-trisulfonic acid were slurried in 200 parts of water and 100 parts of crushed ice for 1 hour, keeping the temperature at 0~5℃, adding 6.9 parts of sodium nitrite (dissolved in 20 Parts of water), carry out diazotization reaction at 5~8℃ for 1 hour, add sulfamic acid to destroy excess nitrous acid, then add 15.1 parts of m-ureidoaniline, adjust pH 5.1 with 120 parts of 15% sodium carbonate solution ~5.8 Coupling reaction for 3 hours is the end point, and the following dye precursors (3-1) are obtained

[0046]

[0047] Examples 2~19

[0048] Using a similar method, the following yellow dye precursors 3-2~19 can be obtained:

[0049]

[0050]

[0051]

[0052]

[0053] Example 20

[0054] Add 100 parts of water and 38.2 parts of bromamine into the beaker, stir, and after the temperature rises to 70°C, add 45.1 parts of 2,4-diaminobenzenesulfonic acid and 40 parts of baking soda, and add 2 at 60~65°C. Part of cuprous chloride is reacted. After 5 hours of reaction, the end point is reached. Add 150 parts of water, heat to 85~95℃, keep for 1 hour, filter, collect the filtrate, neutralize with 100 parts of 30% hydrochloric acid, and adjust the temperature 15~20℃, make all the materials separate out, filter, collect the filter cake, add 200 parts of water to dissolve, adjust pH 6~6.5 with soda ash to obtain the following dye aqueous solution.

[0055]

[0056] Examples 21~27

[0057] The blue dye precursor can be synthesized in the usual way.

[0058]

[0059]

[0060] Example 28

[0061] In a 1000 ml beaker, add 100 parts of crushed ice, 50 parts of water, 19.2 parts of cyanuric chloride, and 0.1 parts of dispersant, stir for 30 to 45 minutes, add the blue precursor (4-1) of Example 20, at pH =5.5~6.5, react at 8~12℃ for 3 hours, add the yellow precursor (3-1) of Example 1 after the end point, heat to 40~45℃, react for 6 hours, neutralize the reaction product with acid binding agent Hydrogen chloride, the solution turns green after the pH is stable, and the following dark green dye is obtained by directly spraying dry.

[0062]