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Blue temporarily water-soluble reactive dye and preparation method thereof

A technology of reactive dyes and blue water, applied in reactive dyes, dyeing methods, azo dyes, etc., can solve the problems of weak van der Waals force and hydrogen bond force, low fastness to wet treatment, etc., to improve dyeing fastness to wet treatment , Improve the effect of dyeing depth

Active Publication Date: 2020-04-21
HANGZHOU TIANMA SIHONG PRINTING & WEAVING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This type of dye can be used for dyeing nylon fiber, but because there is no reactive group in the structure, the dye and nylon fiber are only combined through ionic bond force, weak van der Waals force and hydrogen bond force that are easily affected by water, and are resistant to moisture. Handling fastness is also low

Method used

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  • Blue temporarily water-soluble reactive dye and preparation method thereof
  • Blue temporarily water-soluble reactive dye and preparation method thereof
  • Blue temporarily water-soluble reactive dye and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, a kind of preparation method of blue water temporarily soluble reactive dyestuff, carries out following steps successively:

[0037] 1), after grinding the Indigoidine dye finely with a mortar (can pass through a 300-mesh sieve), add 0.01mol of Indigoidine dye finely ground and 20mL water in a three-necked flask equipped with a stirrer and a thermometer, and stir to form a dispersion (dye Suspension), stand-by;

[0038] 2), according to the molar ratio of Indigoidine dye: cyanuric chloride = 1:2, add 0.2mol (about 18.4g) cyanuric chloride to a 250ml three-necked flask, beat with 80g ice water for 30 minutes at 0°C (beating The rotation speed is controlled at 200 rpm), and then the Indigoidine dye suspension (containing 0.1mol Indigoidine dye) is added, and the first condensation reaction is carried out at 0-5°C and pH 5-6 (the pH value is always maintained during the reaction process) ), the reaction time was about 3 hours. At this time, the spots of cyan...

Embodiment 2

[0042]Embodiment 2, a kind of preparation method of blue water temporarily soluble reactive dye, carry out following steps successively:

[0043] 1), after grinding the Indigoidine dye finely with a mortar (can pass through a 300-mesh sieve), add 0.01mol of Indigoidine dye finely ground and 20mL water in a three-necked flask equipped with a stirrer and a thermometer, and stir to form a dispersion (dye Suspension), stand-by;

[0044] 2) Add 0.2mol (about 18.4g) of cyanuric chloride to a 250ml three-neck flask, beat with 100g of ice water at 0°C for 30 minutes (control the beating speed at 200 rpm), and then add Indigoidine dye suspension (containing 0.1mol Indigoidine dye), carry out the first condensation reaction at 0-5°C, pH 5-6, and the reaction time is about 2 hours. At this time, it is detected by thin-layer chromatography that the spots of cyanuric chloride and Indigoidine dye have disappeared , so as to confirm that the reaction has ended; after the end of the shrinkag...

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Abstract

The invention discloses a blue temporarily water-soluble reactive dye, and also discloses a preparation method of the blue temporarily water-soluble reactive dye. The preparation method comprises thefollowing steps: mixing cyanuric chloride with ice water, pulping, and adding an Indigoidine dye suspension to carry out a primary condensation reaction; adding para-ester / meta-ester into a product obtained by the primary condensation reaction to carry out a secondary condensation reaction; and carrying out salting-out and suction filtration on a product obtained by the secondary condensation reaction to obtain the blue temporarily water-soluble reactive dye. By using the dye, efficient dyeing of polyamide fibers can be realized in a water system, and meanwhile, the dyeing depth and the wet color fastness are improved.

Description

technical field [0001] The invention relates to a blue water temporarily soluble reactive dye and a preparation method thereof. Background technique [0002] In 2015, a group of researchers led by Dr. Jixun Zhan of Utah State University in the United States used E. coli to produce an indigo dye called Indigoidine, and achieved mass production. Indigoidine dye has a pure blue hue and can be used as a coloring agent in food, beverages or cosmetics after further purification. The blue natural dye has attracted more and more attention in the textile industry due to its non-toxic, harmless and non-polluting characteristics. Due to the poor solubility of Indigoidine in solvents and only a small solubility in DMF and DMSO, it is difficult to use aqueous media to achieve dyeing. Therefore, modifying its structure can improve the solubility of dyes and make dyes with practical value. [0003] [0004] Nylon, the scientific name of polyamide fiber, is called nylon internationall...

Claims

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Application Information

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IPC IPC(8): C09B62/04D06P1/382D06P3/24
CPCC09B62/046D06P1/382D06P3/248
Inventor 单树明崔志华
Owner HANGZHOU TIANMA SIHONG PRINTING & WEAVING CO LTD
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