A kind of preparation method and application of active hydrophilic type formaldehyde-free color fixing agent

A formaldehyde-free color-fixing agent, hydrophilic technology, applied in dyeing, textiles and papermaking, etc., can solve the problems of poor hydrophilicity, poor hydrophilicity, resource consumption, etc., and achieve good color fastness to washing, Good hydrophilic performance, little effect of hydrophilicity

Active Publication Date: 2022-04-29
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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  • A kind of preparation method and application of active hydrophilic type formaldehyde-free color fixing agent
  • A kind of preparation method and application of active hydrophilic type formaldehyde-free color fixing agent
  • A kind of preparation method and application of active hydrophilic type formaldehyde-free color fixing agent

Examples

Experimental program
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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, a) preparation of an intermediate product: S1) stirring concentrated hydrochloric acid and slowly adding a tertiary amine dropwise, keeping warm for reaction, and adjusting the pH of the solution to 3 with the tertiary amine ~4; S2) Heating up to 45°C, slowly adding epichlorohydrin dropwise at a temperature of 45-55°C, keeping the temperature for 1.0-2.5h to reach a homogeneous solution, then adjusting the pH value, and cooling down to obtain an intermediate product; b) Intermediate product , polyethylenimine and deionized water into the reaction bottle, stirring slowly drop epichlorohydrin, 20 ~ 40 ℃, heat preservation reaction 5 ~ 7h, 65 ~ 80 ℃, adjust the pH value to 6 ~ 7, cool down Water color fixing agent. The hydrophilic formaldehyde-free color-fixing agent of the present invention has high cationicity and reactive epoxy groups, and has good hydrophilicity and color-fixing effect. The fastness reaches grades 3-5, and meets the national regulation on hygroscopicity within 5 seconds, which can reduce the finishing of subsequent processes and meet the needs of printing and dyeing factories.

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 Patents(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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