Method for making superfine disperse dye

A technology of disperse dyes and dispersants, applied in the direction of organic dyes, etc., can solve the problem of extremely small dissolution of disperse dyes

Inactive Publication Date: 2005-04-20
章浩龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The molecule contains polar groups, but does not contain water-soluble groups such as sulfonic acid groups and carboxylic acid groups. Disperse dyes dissolve very little in water

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The crude disperse dye product obtained by the reaction is filtered by pressure to obtain a dye filter cake (with a solid content of about 50%). Take 100 g of the filter cake and put it into a 500 ml beaker, add 200 g of ethanol to dissolve it, and obtain 300 g of disperse dye.的ethanol solution. Take 50 grams of commercially available MF-2 dispersant, add 100 grams of ethanol solution, stir to obtain 150 grams of ethanol solution of MF-2 dispersant, then mix the alcohol solution of the dispersant in the ethanol solution of the previous disperse dye, and add 300 grams of benzene , Stir for 15 minutes, heat the mixture to 90°C to evaporate, and recover the evaporated ethanol and benzene. The disperse dye slurry is obtained. After measurement, the dye particle size of the disperse dye slurry is 10-100 nanometers.

Embodiment 2

[0011] The crude disperse dye product obtained by the reaction is filtered by pressure to obtain a dye filter cake (with a solid content of about 50%). Take 100 g of the filter cake and put it into a 500 ml beaker, add 200 g of ethanol to dissolve it, and obtain 300 g of disperse dye.的ethanol solution. Take 50 grams of commercially available MF-2 dispersant, add 100 grams of ethanol solution, stir to obtain 150 grams of alcohol solution of MF-2 dispersant, then mix the alcohol solution of the previous disperse dye alcohol solution dispersant, and add 300 grams of benzene , Stir for 15 minutes, heat the mixture to 90°C to evaporate, and recover the evaporated ethanol and benzene. The disperse dye slurry is obtained. After measurement, the dye particle size of the disperse dye slurry is 10-100 nanometers.

Embodiment 3

[0013] The crude disperse dye product obtained by the reaction is filtered by pressure to obtain a dye filter cake (with a solid content of about 50%). Take 100 g of the filter cake and put it into a 500 ml beaker, add 200 g of ethanol to dissolve it, and obtain 300 g of disperse dye.的ethanol solution. Take 50 grams of commercially available MF-2 dispersant, add 100 grams of ethanol solution, stir to obtain 150 grams of alcohol solution of MF-2 dispersant, then mix the alcohol solution of the previous disperse dye alcohol solution dispersant, and add 300 grams of benzene , Stir for 15 minutes, heat the mixture to 90°C to evaporate, and recover the evaporated ethanol and benzene. The disperse dye slurry is obtained. After measurement, the dye particle size of the disperse dye slurry is 10-100 nanometers.

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Abstract

Said invention discloses a method for preparing ultrafine disperse dyes. The disperse unfinished products is made by reaction to obtain filter cake through filter-press, then added with organic solvent A to solve, then added with solution of organic solvent an of dispersant, through stirring to obtain mixer containing dirperse dyes, dispersant and organic solvent A. Adding organic solvent B to replace, removing organic solvent B to obtain paste of disperse dyes, then drying to obtain solid disperse dyes. The above mentioned organic solvent an is alcahol or acetone, organic solvent B is benzene, toluene or xylene, dispersant is dispersant MF or lignosulfonate. The dyes particle cab be dispersed into size of 10-100 nm by said method which can reduce cost, simplify dyeing process and raise dyeing quality.

Description

Technical field [0001] The invention relates to a method for preparing dyes, in particular to a method for preparing ultrafine disperse dyes. Background technique [0002] Disperse dyes refer to a type of dyes that are dispersed in the dye bath in the presence of a dispersant. The molecule contains polar groups, but does not contain water-soluble groups such as sulfonic acid groups and carboxylic acid groups, and disperse dyes are extremely soluble in water. Disperse dyes are used for dyeing and printing of synthetic fibers such as polyester, polypropylene, nylon and spandex. They are a kind of dyes with a wide range of uses. They are mainly used for printing and dyeing of polyester and its blended fabrics. Therefore, the development of disperse dyes and the increasing production of polyester It is closely related and is the most used dye among all dyes. [0003] The original disperse dyes obtained by the reaction usually need to be filtered, sanded and spray-dried to obtain the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/38
Inventor 章浩龙
Owner 章浩龙
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