Dyeing auxiliary agent and application thereof in polyester dyeing
A technology of dyeing auxiliaries and dosage ratio, which is applied in the field of dyeing and finishing, can solve the problems of unsatisfactory dyeing rate of hydrophobic fibers, irritating odor of glacial acetic acid, and high cost of use, and achieves low dyeing cost and strong color fastness. , the effect of high dyeing rate
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Embodiment 1
[0059]The preparation method of diacid compound includes the following steps:
[0060](1) Add 1,3-acetone dicarboxylate diethyl (0.50mol), triethyl orthoformate (1.00mol), and urea (0.75mol) to xylene (300mL), stir and reflux at 150℃ After 5 hours of reaction, a large amount of yellow product precipitates; vacuum rotary evaporation to remove the ethanol generated during the reaction, continue to stir and reflux for 1 hour to make the reaction complete. After cooling to room temperature, the crude product obtained by filtration is fully washed with dichloromethane for more than 3 times to The lotion is colorless; then it is dried under vacuum at 60°C to obtain compound a as a pale yellow powder;
[0061]The result of the proton nuclear magnetic resonance spectrum of compound a is:1H NMR (500MHz, DMSO-d6) δ 11.18 (s, 1H), 8.19 (s, 2H), 4.18 (q, J = 7.3 Hz, 4H), 1.25 (t, J = 7.3 Hz, 6H).
[0062](2) Compound a (11.95g), 1-bromohexadecane (18.25g) and anhydrous potassium carbonate (9.66g) were a...
Embodiment 2
[0071]A method for preparing a dyeing auxiliary agent includes the following steps:
[0072]According to the mass ratio of mixed acid and sodium acetate of 1:1, the mass ratio of formic acid, citric acid, sulfuric acid, DL-malic acid and the diacid compound of Example 1 in the mixed acid is 10:2:1:2:1, The components are mixed together, and stirred for 10 minutes at a stirring speed of 1000 rpm at 25° C. to mix evenly to obtain a dyeing auxiliary.
Embodiment 3
[0074]The mass ratios of the formic acid, citric acid, sulfuric acid, DL-malic acid and the bisacid compound of Example 1 in Example 2 are adjusted as shown in Table 1, and the others are the same as Example 2, to obtain a dyeing auxiliary.
[0075]Use the dyeing auxiliaries obtained in Examples 2 and 3 for polyester dyeing, such asimage 3 As shown, specifically:
[0076]Dissolve the Disperse Scarlet GS (1% owf) in water, add dyeing auxiliaries to adjust the pH to 5.3, mix well to obtain the dye liquor; then put the polyester fabric into the dye liquor, control the bath ratio to 1:30, and set the high temperature The high-pressure dyeing machine is heated from room temperature to 75°C at a rate of 3°C / min, and then from 75°C to 125°C at a rate of 2°C / min. After dyeing at 125°C for 30 minutes, the temperature is reduced to below 80°C at full speed. Dyeing, reduction cleaning after dyeing (reducing cleaning solution formula is: sodium dithionite (sodium hydroxide) 2g / L, sodium hydroxide 2g / ...
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