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Preparation method and application of a dendritic polyamine cationic modifier with multiple active centers

A cationic modifier and dendritic technology, applied in the field of textile printing and dyeing, can solve the problems of high cost, large amount of cationic modifier, and inability to apply in large quantities.

Active Publication Date: 2021-09-14
绍兴九沐兰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally speaking, because the existing cationic modifiers contain relatively few active groups, and the usual epoxy active groups are easily hydrolyzed in alkaline aqueous solution and become ineffective, so there are large amounts of cationic modifiers and high cost. , cannot be applied in large quantities to the processing of cotton yarn and cotton cloth

Method used

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  • Preparation method and application of a dendritic polyamine cationic modifier with multiple active centers
  • Preparation method and application of a dendritic polyamine cationic modifier with multiple active centers
  • Preparation method and application of a dendritic polyamine cationic modifier with multiple active centers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 18.2 parts of trichloro-s-triazine to a three-necked flask placed in an ice-water bath where a stirrer, a thermometer, and a reflux condensing tube are housed; , n=1, M.W.=600, 50% content) aqueous solution is slowly added in the trichloro-s-triazine solution, the molar ratio of trichloro-s-triazine and polyamine compound is 5:1, with 10% Na 2 CO 3 The pH value of the solution was adjusted to 5, and stirred for 3 hours until the pH of the reaction solution remained at 5 to prepare dichloro-s-triazine dendritic polyamine derivatives. Then drip epichlorohydrin, the molar ratio of epichlorohydrin and polyamine compounds is 5:1, after the dropwise addition is completed, the temperature is raised to 50 degrees, and it is incubated for 6 hours to obtain the dendritic polyamine with multiple active centers of formula III cationic modifier.

Embodiment 2

[0036] Add 18.2 parts of trichloro-s-triazine to a three-necked flask placed in an ice-water bath where agitator, thermometer, and reflux condenser are housed; Dendrimer, 1.0G PAMAM, R 1 is ethyl, M.W.=500, 50% content) aqueous solution is slowly added to trichloro-s-triazine solution, the molar ratio of trichloro-s-triazine to polyamine compound is 5:1, and 10% Na 2 CO 3 The pH value of the solution was adjusted to 6, and stirred for 3 hours until the pH of the reaction solution remained at 6 to prepare dichloro-s-triazine dendritic polyamine derivatives. Then drip epichlorohydrin, the molar ratio of epichlorohydrin and polyamine compound is 5:1, after the addition is completed, the temperature is raised to 50 degrees, and the insulation is kept for 6 hours to obtain the dendritic polyamine with multiple active centers of formula IV cationic modifier.

Embodiment 3

[0038]Add 18.2 parts of trichloro-s-triazine to a there-necked flask placed in an ice-water bath where a stirrer, a thermometer, and a reflux condenser are equipped; , n=2, M.W.=1000, 50% content) aqueous solution is slowly added in the trichloro-s-triazine solution, the molar ratio of trichloro-s-triazine and polyamine compound is 10:1, with 10% Na 2 CO 3 The pH value of the solution was adjusted to 6, and stirred for 3 hours until the pH of the reaction solution remained at 6 to prepare dichloro-s-triazine dendritic polyamine derivatives. Then drip epichlorohydrin, the molar ratio of epichlorohydrin and polyamine compound is 10:1, after the addition is completed, the temperature is raised to 60 degrees, and it is incubated for 5 hours to obtain the dendritic polyamine with multiple active centers of formula III cationic modifier.

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Abstract

The invention discloses a preparation method of a multi-active center dendritic polyamine cationic modifier: (1) using trichloro-s-triazine and dendritic polyamine compounds to react under acidic conditions to generate dichloro-s-triazine (2) adding epichlorohydrin to the dichloro-s-triazine dendritic polyamine derivative, and heating and reacting to generate a multi-active center dendritic polyamine cationic modifier. The dendritic polyamine cationic modifier prepared by the invention is used for the modification of cotton fabrics, realizes the efficient cationization of cotton fibers, significantly improves the dyeing rate and fastness of reactive dyes, and realizes the salt-free, salt-free, high-efficiency effects of reactive dyes on cotton fibers. Low-alkali, efficient and environmentally friendly dyeing.

Description

technical field [0001] The invention belongs to the technical field of textile printing and dyeing, in particular to a preparation method and application of a dendritic polyamine cationic modifier with multiple active centers. Background technique [0002] As we all know, reactive dyes have become the main dyes for cotton fiber dyeing because of their advantages such as simple structure, complete color spectrum, low cost and high fastness. During the dyeing process, the cotton fiber is negatively charged and has weak adsorption to anionic reactive dye molecules, resulting in low dye uptake and fixation rates. Therefore, a large amount of inorganic salts need to be added to the traditional dyeing process to promote dyeing. Improve the dye uptake rate and color fixation rate. The dosage of salt is generally 30-200g / L. The discharge of a large amount of inorganic salts in printing and dyeing wastewater has caused serious environmental pollution. On the other hand, since the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/02C08G83/00C07D251/44D06P1/38D06P1/52D06P1/66D06P3/66
CPCC07D251/44C08G73/0293C08G83/004D06P1/38D06P1/5264D06P1/66D06P3/66
Inventor 吴起袁平
Owner 绍兴九沐兰科技有限公司