Dispersion blue dye composition

[0030] With the dyestuff A of 60 grams of formula (Ia), the dyestuff B of 16 grams of formula (IIb), the dyestuff C of 24 grams of formula (IIIa), the sodium lignosulfonate of 195 grams, after adding water and blending, grind and disperse with grinder , and spray-dry to obtain the finished product. The dye can provide bright blue color to the fabric.

[0031]

[0033] According to the preparation method of Example 1, the structures of dye A, dye B, and dye C defined by each substituent are as shown in Table 1, and the described composite dye is dye A, dye B, Dye C was blended.

[0034] Table 1

[0035]

[0036] C2

[0037] Example name

[0039] Take 0.5 grams of the disperse dyes prepared in Examples 1 to 14 and disperse them in 500 milliliters of water, absorb 20 milliliters and mix them with 60 milliliters of water, adjust the pH of the dyeing bath to 5 with acetic acid, heat up to 70°C and put 2 grams of poly The ester fiber is dyed, the temperature is raised from 70°C to 130°C within 30 minutes, the temperature is kept for 30 minutes, and the sampling starts when it is cooled to 90°C. Observe the color and light of the sample cloth, and use the national standard GB / T3921-1997, GB / T3920-1997, GB / T3922-1997, GB / T8427-1998 to test its fastness to washing, rubbing, perspiration and sunlight respectively. The results are shown in table 3.