A kind of scarlet reactive dye and its application
A technology of reactive dyes and dyes, applied in the field of scarlet reactive dyes and its applications, can solve the problems of unsatisfactory color fastness, low water solubility of orange, unsatisfactory color fixing rate and level dyeing property, etc., and achieve good color fixing ability, High solubility, stable direct effect
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[0044] The preparation method of formula (3) dyestuff comprises the steps:
[0045] 1) beating 2-amino-4-acetamidobenzenesulfonic acid, adjusting pH=7.0 with liquid caustic soda to dissolve, set aside;
[0046] 2) Add water to para-ester, hydrochloric acid, and make ice for 30 minutes, add 30% aqueous sodium nitrite solution, maintain temperature T=0-5°C, and use sulfamic acid to eliminate excess sodium nitrite after 1 hour of reaction; when starch potassium iodide The test paper is colorless, the Congo red test paper is blue, the end point is reached, and the diazo liquid is obtained;
[0047] 3) adding the diazo liquid prepared in step 2) to the 2-amino-4-acetamidobenzenesulfonic acid liquid prepared in step 1), adjusting pH=7.0-7.5, maintaining temperature T=8-15°C, After 6 hours of reaction, the end point is reached, and a coupling solution is obtained; the coupling solution is filtered to remove insoluble matter, and spray drying is performed to obtain the dye of formula...
Embodiment 1
[0049] 50g of formula (1-1) dye, 20g of formula (2-1) dye and 30g of formula (3) dye were fully mechanically mixed to obtain the bright red reactive dye of this embodiment.
[0050]Take 4g of the scarlet reactive dye prepared above to fully dissolve it with an appropriate amount of water, then set the volume in a 500ml volumetric flask, absorb 10ml of dye solution and mix it with 50ml of water, then add 4g of cotton cloth, 1.8g of sodium sulfate, 0.4g of DG- 170, then rise to 60°C at a heating rate of 1°C / min, add 1g of sodium carbonate after holding for 30 minutes, and then keep at 60°C for dyeing for 30 minutes, then take out the dyed cotton cloth, and boil it with non-ionic detergent boiling soap for 15 minutes, then washed with water and dried at about 70 ℃, the dye can dye cotton into red with deep color, good levelness, good reproducibility and good color fastness.
Embodiment 2
[0052] An aqueous solution containing 50 g of the dye of formula (1-2), an aqueous solution containing 20 g of a dye of formula (2-1) and an aqueous solution containing 30 g of a dye of formula (3) were fully mechanically mixed to obtain the scarlet reactive dye of this embodiment.
[0053] Take 4g of the scarlet reactive dye prepared above to make it fully dissolved with an appropriate amount of water, then set the volume in a 500ml volumetric flask, absorb 10ml of dye solution and mix with 50ml of water, then add 4g of cotton cloth, 1.8g of sodium sulfate, 0.4g of DG -170, then rise to 60°C at a heating rate of 1°C / min, add 1g of sodium carbonate after holding for 30 minutes, and then keep at 60°C for dyeing for 30 minutes, then take out the dyed cotton cloth and boil it with non-ionic detergent boiling soap 15 minutes, then washed with water and dried at about 70 ℃, the dye can dye cotton into red with deep color, good levelness, good reproducibility and good color fastness....
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