A kind of leveling agent and its preparation method and application

A technology of leveling agent and solvent, which is applied in the field of textile printing and dyeing, and can solve problems such as the inability to achieve dyeing uniformity

Active Publication Date: 2020-06-23
SUZHOU TANGHUA NANO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But, when this chitosan derivative dispersant is added in the dyestuff and carries out large-scale continuous dyeing under normal temperature and pressure, because the contact time of dyestuff and fabric is very short, only 10~20s, and the area of ​​fabric expands, even if Grinding disperse dyes to the nanometer range under the action of dispersants still cannot achieve the uniformity of dyeing, and it is impossible to avoid the difference in front and back colors caused by migration during drying and color development.

Method used

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  • A kind of leveling agent and its preparation method and application
  • A kind of leveling agent and its preparation method and application
  • A kind of leveling agent and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Step 1: Preparation of halogenated crosslinking agent

[0072] Under ice-water bath conditions, add oleic acid, hydrogen bromide, and chloroform in a three-necked flask at a certain mass ratio, reflux with a straight condenser, stir, and after reacting for 30-50 minutes, wash the product with water until it is neutral and add distillation The solvent chloroform and unreacted hydrogen bromide are distilled out in a constant temperature water bath at 70-75°C to obtain a yellow product A.

[0073] The mass ratio of oleic acid, hydrogen bromide and chloroform is 1:0.28~0.35:1.78~2.14.

[0074] The reaction equation is:

[0075]

[0076] Step 2: Chitosan modification

[0077] Chitosan, sodium hydroxide and product A are added to carbon tetrachloride in a certain proportion, stirred at 80-100°C, reacted for 3 to 4 hours, and then distilled under reduced pressure at 40°C to obtain product B. Among them, the chitosan is water-soluble chitosan with a relative molecular mass of 1000-1200...

Embodiment 2

[0094] The overall idea of ​​embodiment 2 is carried out according to embodiment 1, and the specific parameters are as follows:

[0095] The mass ratio of oleic acid, hydrogen bromide, and chloroform in step one is set as 1:0.28:1.78, and the product A is distilled at 70°C, and then the chitosan, sodium hydroxide, product A, and tetrachloride in step two The mass ratio of carbonized carbon is set as: 1:0.50:2.30:5.00, reacted at 80°C for 3 hours to obtain product B, and then the mass ratio of glycerin, product B, catalyst and toluene in step 3 is set as 1:16.50 : 0.07: 4.00, react at 140°C for 4 hours to obtain product C.

[0096] In step four, disperse red 3B, sodium lauryl sulfate, glycerin, and dispersant were ground with mass fractions of 2wt%, 3wt%, 2wt%, and 1wt% to prepare nano dyes, and then 1.0g / L After adding product C, adding acetic acid to adjust the pH value of the dyeing slurry to 5.5, select 190T, 58g / m 2 The polyester taffeta, according to step four dyeing method 1...

Embodiment 3

[0097] The overall idea of ​​embodiment 3 is carried out according to embodiment 1, and the specific parameters are as follows:

[0098] The mass ratio of oleic acid, hydrogen bromide, and chloroform in step 1 is set as 1:0.31:2.00, and the product A is distilled at 73°C. Then, the chitosan, sodium hydroxide, product A, and tetrachloro The mass ratio of carbonized carbon is set as 1:0.55:2.35:5.50, and reacted at 90°C for 3.5 hours to obtain product B. Then, the mass ratio of glycerin, product B, catalyst, and toluene in step 3 is set as 1:17.00 :0.08:4.10, reacted at 145°C for 4.5 hours to obtain product C.

[0099] In step four, disperse yellow G, sodium lauryl sulfate, glycerin, and dispersant were ground at 3.5wt%, 4wt%, 2.5wt%, 1.5wt% to prepare nano-dye, and then 1.5g / After adding solid C to the amount of L, adding acetic acid to adjust the pH value of the dyeing slurry to 6.0, select 300T, 63g / m 2 According to step four dyeing method 1, set the fabric running speed to 90m / ...

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Abstract

The invention relates to a leveling agent, a preparation method and an application thereof. The structural formula of the leveling agent is: n is a number between 5 and 10. The leveling agent of the present invention has good film-forming properties, and contains abundant ester groups, which can be combined with dyes through hydrogen bonds, and then can carry the dyes to the surface of the fabric evenly and form a film with uniform thickness, so that the dyes can be evenly Adhesion to the fabric to prevent uneven dispersion caused by the short contact time between the dye and the fabric. At the same time, the film can also prevent the migration and sublimation of the dye during the drying and color development process, and prevent the color difference between the warp direction, weft direction and front and back of the fabric . The leveling agent of the present invention is suitable for continuous pad dyeing and coating dyeing. Compared with dyeing vat dyeing under high temperature and high pressure, it can reduce energy consumption, improve dyeing efficiency, improve product quality, and improve fabric color fastness and color. The uniformity of the product reaches the grade A grade stipulated by the national standard, making it possible to replace the high-temperature and high-pressure dyeing vat dyeing with continuous dyeing under normal temperature and pressure.

Description

Technical field [0001] The invention belongs to the technical field of textile printing and dyeing, and particularly relates to a leveling agent suitable for continuous padding or coating dyeing of polyester fabrics under normal temperature and pressure, and a preparation method and application thereof. Background technique [0002] The textile industry has made a huge contribution to my country's economic development, and the textile printing and dyeing industry employs more than 50 million people, and it has been facing very serious environmental pollution and energy shortages. The daily discharge of printing and dyeing wastewater reaches 6 million tons. Not only the composition is complex and changeable, but also the concentration is high, the color is deep, the COD value, and the Cr value are large. At the same time, it also contains a variety of toxic and hazardous substances, which brings greater waste to wastewater treatment and discharge standards. Difficulty. At the sam...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06P1/48C08B37/08D06P1/16D06P3/54
CPCD06P1/16D06P1/48D06P3/54C08B37/003D06P2001/0092
Inventor 陈艳珍王鹏陈精明曾桂香张仁海黄海彬
Owner SUZHOU TANGHUA NANO TECH
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