Preparation method and application of active hydrophilic formaldehyde-free color fixing agent

An aldehyde-free color-fixing agent, hydrophilic technology, applied in the direction of dyeing, textile and paper making, etc., can solve the problems of poor hydrophilicity, poor hydrophilicity, waste of resources, etc., and achieve good color fastness to washing, The effect of good hydrophilic performance and good color fixing performance

Active Publication Date: 2020-05-12
DYMATIC CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the polymer is formed into a film on the surface of cotton fibers, the hydrophilicity becomes poor, so it is difficult to meet the national regulation on hygroscopicity within 5 seconds, which affects the finishing process of the subsequent process.
Especially for towel fabric and package yarn, the hygroscopicity of the towel fabric itself will become worse after the color fixing treatment; the hydrophilicity of the package yarn will also deteriorate after the color fixing treatment, resulting in poor sizing effect
Therefore, many printing and dyeing factories only add antistatic agent or hydrophilic softener after fixing the color to carry out the subsequent process, which is a waste of time and resources
[0003] The existing color fixing agents either have good color fixing effect but poor hydrophilicity; or good hydrophilicity but poor color fixing effect, and it is difficult to meet the requirements of printing and dyeing factories for color fastness to washing and hydrophilicity at the same time

Method used

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  • Preparation method and application of active hydrophilic formaldehyde-free color fixing agent
  • Preparation method and application of active hydrophilic formaldehyde-free color fixing agent
  • Preparation method and application of active hydrophilic formaldehyde-free color fixing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of intermediate products:

[0025] Add 28 parts of concentrated hydrochloric acid (37%) into the reaction flask, stir, slowly add 50 parts of trimethylamine solution (33%) dropwise, and control the temperature at 20-30°C; Finally, use trimethylamine solution to adjust the pH of the solution to 3~4; then raise the temperature to 45°C, slowly add 22 parts of epichlorohydrin (ECH) dropwise, control the temperature at 45~55°C, and keep the temperature for 1.0~2.5h after dropping Until it becomes a homogeneous solution, finally adjust the pH value to 7-8 with a trimethylamine solution, and cool down to obtain an intermediate product with a solid content of 48% for later use.

[0026] (2) Preparation of hydrophilic formaldehyde-free color fixing agent: add 16 parts of intermediate product of step (1), 12 parts of polyethyleneimine (linear type, molecular weight 600) and 56 parts of deionized water, stirred, and slowly dropwise added 16 parts of epichlorohydri...

Embodiment 2

[0028] (1) preparation of intermediate product: same as example 1;

[0029] (2) Preparation of hydrophilic formaldehyde-free color fixing agent: add 34 parts of intermediate products of step (1), 7.5 parts of polyethyleneimine (linear type, molecular weight 600) and 52 parts of deionized Water, stirred, and slowly added dropwise 6.5 parts of epichlorohydrin (ECH), and the temperature was controlled at 20-40°C. After dripping and keeping warm for 5-7 hours, the temperature is controlled at 65-80°C, and finally the pH value is adjusted to 6-7 with glacial acetic acid, and the temperature is lowered to obtain a hydrophilic formaldehyde-free color-fixing agent.

Embodiment 3

[0031] (1) preparation of intermediate product: same as example 1;

[0032] (2) Preparation of hydrophilic formaldehyde-free color fixing agent: add 33 parts of intermediate product of step (1), 8 parts of polyethyleneimine (linear type, molecular weight 10000) and 52.4 parts of deionized Water, stirred, slowly added 6.6 parts of epichlorohydrin (ECH) dropwise, and the temperature was controlled at 20-40°C. After dripping and keeping warm for 5-7 hours, the temperature is controlled at 65-80°C, and finally the pH value is adjusted to 6-7 with glacial acetic acid, and the temperature is lowered to obtain a hydrophilic formaldehyde-free color-fixing agent.

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Abstract

The invention relates to a preparation method of an active hydrophilic formaldehyde-free color fixing agent. The preparation method comprises the following steps: S1) stirring concentrated hydrochloric acid, slowly dropwise adding tertiary amine, carrying out a heat-preserved reaction, and regulating the pH value of the obtained solution to 3-4 by using tertiary amine; S2) carrying out heating to45 DEG C, slowly and dropwise adding epoxy chloropropane, keeping a temperature at 45-55 DEG C, conducting a reaction for 1.0-2.5 hours under a heat preservation condition so as to obtain a homogeneous solution, regulating the pH value, and performing cooling to obtain an intermediate product; and b) adding the intermediate product, polyethyleneimine and deionized water into a reaction bottle, slowly and dropwise adding epoxy chloropropane while stirring, carrying out a heat-preserved reaction at 20-40 DEG C for 5-7 hours, regulating the pH value to 6-7, and performing cooling to obtain the hydrophilic color fixing agent. The hydrophilic formaldehyde-free color fixing agent disclosed by the invention has a relatively high cation degree and reactive epoxy groups, and also has good hydrophilicity and color fixing effect; and after a cotton fabric is subjected to color fixing treatment with the agent, the washing fastness of the fabric reaches level 3-5 and accords with the national regulation that hygroscopicity is within 5 seconds in China, the finishing of a subsequent procedure can be reduced, and the use requirements of printing and dyeing plants are met.

Description

technical field [0001] The invention belongs to the technical field of fabric finishing, and in particular relates to a preparation method and application of an active hydrophilic formaldehyde-free color fixing agent. Background technique [0002] Color fixing agents for reactive dyes can be divided into polycation color fixing agents, dicyandiamide resin color fixing agents, polyamine resin color fixing agents and reactive color fixing agents from the chemical structure. The principle of color fixation is: the cationic group reacts with the dye to form a water-insoluble salt, which is attached to the fabric, and forms a layer of polymer film on the surface of the cotton fiber, covering the dye firmly, thereby improving the dyeing fastness. Spend. Although the traditional color fixing agent has a good color fixing effect, it can meet the requirements of Oeko-Tex Standard 100 for the washing fastness of fabrics to reach grades 3 to 4. However, after the polymer is formed in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/04D06P5/08D06P3/66
CPCC08G73/0206C08G73/0213D06P5/08D06P3/66
Inventor 祝小华陈玉珍黄尚东陈祖芬
Owner DYMATIC CHEM
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