A Dyeing Auxiliary and Its Application in Polyester Dyeing
A technology of dyeing auxiliaries and dosage ratio, which is applied in the field of dyeing and finishing, and can solve the problems of unsatisfactory dyeing rate of hydrophobic fibers, strong pungent smell of glacial acetic acid, and high cost of use, so as to achieve low dyeing cost and strong color fastness , the effect of high dyeing rate
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Embodiment 1
[0059] The preparation method of bis-acid compound comprises the steps:
[0060] (1) Add diethyl 1,3-acetonedicarboxylate (0.50mol), triethyl orthoformate (1.00mol), and urea (0.75mol) into xylene (300mL), stir and reflux at 150°C After reacting for 5 hours, a large amount of yellow product precipitates were generated; the ethanol generated in the reaction process was removed by rotary evaporation under reduced pressure, and the reaction was continued to stir and reflux for 1 hour to make the reaction fully, and the crude product obtained by filtering after cooling to room temperature was fully washed more than 3 times with dichloromethane to The lotion was colorless; then vacuum-dried at 60°C to obtain light yellow powder compound a;
[0061] The proton nuclear magnetic resonance spectrum result of compound a is: 1 H NMR (500 MHz, 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) Add compound a (11.95g), 1-bromohexadeca...
Embodiment 2
[0071] A preparation method of dyeing auxiliary agent, comprising the steps of:
[0072] According to the mass ratio of mixed acid and sodium acetate is 1:1, the mass ratio of formic acid, citric acid, sulfuric acid, DL-malic acid and the bis-acid compound of Example 1 in the mixed acid is 10:2:1:2:1, All the components were mixed together, stirred at 25° C. at a stirring speed of 1000 rpm for 10 minutes, and mixed evenly to obtain a dyeing auxiliary.
Embodiment 3
[0074] Adjust the quality of formic acid, citric acid, sulfuric acid, DL-malic acid and the bis-acid compound in Example 1 as shown in Table 1 in Example 2, and keep the others consistent with Example 2 to obtain dyeing auxiliaries.
[0075] The dyeing auxiliaries that embodiment 2 and 3 are obtained are used for polyester dyeing, as image 3 As shown, specifically:
[0076] Dissolve Disperse Scarlet GS (1% owf) in water, add dyeing auxiliaries to adjust the pH to 5.3, and mix well to obtain a dye liquor; then put the polyester fabric into the dye liquor, control the bath ratio to 1:30, and set high temperature The high-pressure dyeing machine raises the temperature from room temperature to 75°C at a rate of 3°C / min, and then raises the temperature from 75°C to 125°C at a rate of 2°C / min. After dyeing at 125°C for 30 minutes, it cools down to below 80°C at full speed. Dyeing, reduction cleaning after dyeing (the formula of reduction cleaning solution is: sodium dithionite (su...
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