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Preparation method of liquid ultra-fine dispersion dye

A disperse dye, liquid technology, applied in the fields of fine chemicals and material science, can solve the problems of irregular particle shape, large particle size of dyes, poor commercial quality, etc., and achieve stable product quality, simple production process, and small equipment investment Effect

Inactive Publication Date: 2011-05-04
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although my country's disperse dyes are developing rapidly, the overall quality is not high enough, and the commercialization quality is poor.
The more prominent problems are that the particle size of the dye is large, the particle size distribution range is wide, the particle shape is irregular, the crystal form of the dye is unstable, and the dispersion stability is poor, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0017] 2g of naphthalenesulfonic acid formaldehyde condensate polymer dispersant, 20g of disperse dye RRL was dissolved in 200g of tetrahydrofuran, mechanically stirred for 10min, the mixture was transferred to a sand mill and ground at a speed of 1800r / min for 1h, then 7mL / min The speed starts to continuously add 160g of phase separation agent toluene dropwise, after the dropwise addition, take out the sample, centrifuge at a high speed for 30min, pour off the supernatant liquid, wash the lower layer solid with methanol several times, and dry it in an oven to obtain disperse dye powder.

[0018] Disperse the disperse dye powder directly in water, adjust the pH to 8.0, and process it with high-speed mechanical stirring for 20 minutes. The particle size of the obtained product is 178.9 nm.

example 2

[0020] 6g of polyacrylic acid-methyl methacrylate polymer dispersant, 30g of disperse dye dianix blueKB-FS were dissolved in 200g of acetone, mechanically stirred for 10min, the mixture was transferred to a sand mill and ground at a speed of 2000r / min for 1h, Then start to drop 200g of phase separation agent xylene continuously at a speed of 8mL / min. After the dropwise addition, take out the sample, centrifuge at a high speed for 30min, pour off the supernatant, and wash the lower solid with ethanol for several times, then dry it in an oven. Obtain disperse dye powder.

[0021] Disperse the disperse dye powder directly in water, adjust the pH to 8.0, and process it with high-speed mechanical stirring for 20 minutes. The particle size of the obtained product is 165.9 nm.

example 3

[0023] 12g of polystyrene polymer dispersant, 40g of Cuilan HBF were dissolved in 200g of pyrrolidone, mechanically stirred for 10min, the mixture was transferred to a sand mill and ground at a speed of 2100r / min for 1h, and then started at a speed of 9mL / min Continuously add 300 g of phase separation agent benzene dropwise. After the dropwise addition, take out the sample, centrifuge at high speed for 30 minutes, pour off the supernatant liquid, wash the lower layer solid with isobutanol several times, and dry it in an oven to obtain disperse dye powder.

[0024] Disperse the disperse dye powder directly in water, adjust the pH to 8.0, and process it with high-speed mechanical stirring for 20 minutes. The particle size of the obtained product is 158.6 nm.

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Abstract

The invention provides a preparation method of a liquid ultra-fine dispersion dye, belonging to the field of fine chemical engineering and material science. The preparation method provided by the invention comprises the following steps of subjecting a dispersion dye into surface modification by means of microcapsule technology, so that the surface of the dispersion dye which is modified is coated with a polymer, the agglomeration of particles of the dispersion dye is prevented, and the dispersion dye with good flowability, easy dispersibility and stability is obtained; and when the dispersion dye is dispersed in a solvent, the liquid ultra-fine dispersion dye of which is particle size is less than 180 nm can be obtained. The method provided by the invention is suitable for the surface modification and the nanocrystallization of various dispersion dyes and is characterized by low device investment, simple preparation process and stable product quality and etc.

Description

technical field [0001] The invention belongs to the fields of fine chemical industry and material science, and specifically relates to the method of phase separation to deposit one or more layers of polymers on the surface of disperse dyes to obtain a stable liquid superfine disperse dye. technical background [0002] The particle size of disperse dyes affects the cost and quality of dyeing. Disperse dyes with small particle size and narrow distribution can significantly improve high-temperature dispersibility, dyeing uptake, and lifting power. At the same time, with the development of fine denier synthetic fibers and new composite fibers, the requirements for the fineness of disperse dye particles are gradually increasing. Although my country's disperse dyes are developing rapidly, the overall quality is not high enough, and the commercialization quality is poor. The more prominent problems are that the particle size of the dye is large, the particle size distribution rang...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/40C09B67/08C09B67/10
Inventor 付少海丁磊王春霞田安丽王潮霞
Owner JIANGNAN UNIV
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