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A method for improving the dispersing performance of nonionic dispersants to organic pigments

A technology of non-ionic dispersants and organic pigments, applied in the field of textile printing and dyeing, can solve the problems of low molecular weight and low binding energy of non-ionic dispersants

Active Publication Date: 2019-03-26
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular weight of non-ionic dispersants is low, the number of adsorption points on the surface of the pigment is small, and the binding energy between the two is low. Only the steric hindrance effect prevents the aggregation of pigment particles, so there will be certain problems in the stability of the dispersion system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add cellulase and amylase with a mass ratio of 1:1 in water, stir to dissolve; add a non-ionic dispersant with a mass ratio of 8:1:1 to cellulase and amylase, and stir to fully dissolve; add Organic pigment blue solid, its mass ratio with non-ionic dispersant, cellulase and amylase is 10:8:1:1, adjust the amount of water, make the final mass ratio of water and organic pigment blue be 20:1, in ultrasonic pulverization Under the condition of treatment for 60min to prepare the organic pigment dispersion. The particle diameter of the organic pigment blue was determined to be 158nm.

Embodiment 2

[0019] Add cellulase and amylase with a mass ratio of 1:1 in water, stir to dissolve; add a non-ionic dispersant with a mass ratio of 8:1:1 to cellulase and amylase, and stir to fully dissolve; add Organic pigment yellow solid, its mass ratio with non-ionic dispersant, cellulase and amylase is 10:8:1:1, adjust the amount of water, make the final mass ratio of water and organic pigment yellow be 10:1, in ultrasonic pulverization Under the condition of treatment for 40min to prepare the organic pigment dispersion. The particle diameter of organic pigment yellow was determined to be 196nm.

Embodiment 3

[0024] Add cellulase and amylase with a mass ratio of 1:1 in water, stir to dissolve; add a non-ionic dispersant with a mass ratio of 8:1:1 to cellulase and amylase, and stir to fully dissolve; add Organic pigment red solid, its mass ratio with non-ionic dispersant, cellulase and amylase is 10:8:1:1, adjust the amount of water, make the final mass ratio of water and organic pigment red be 5:1, in ultrasonic pulverization The organic pigment dispersion was prepared by treating for 50 minutes under the same conditions. The particle diameter of organic pigment red was determined to be 174nm.

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Abstract

Belonging to the technical field of textile printing and dyeing, the invention relates to a method for improving the dispersibility of a nonionic dispersant to an organic pigment. The method adopts the following process of: adding cellulase and amylase in a mass ratio of 1:1 into water, performing stirring to dissolve the substances fully; adding a nonionic dispersant in a mass ratio of 8:1:1 to the cellulase and amylase, performing stirring for full dissolution; adding an organic pigment solid in a mass ratio of 10:8:1:1 to the nonionic dispersant, cellulase and amylase, adjusting the water amount to reach a water-organic pigment final mass ratio of 20:1-5:1, and performing treatment under an ultrasonic crushing condition for 40-60min, thus obtaining the organic pigment dispersion. The method provided by the invention makes use of the synergistic effect generated by the complementary structural properties of cellulase, amylase and the nonionic dispersant to improve the dispersibility to the organic pigment.

Description

technical field [0001] The invention relates to a method for improving the dispersing performance of a nonionic dispersant on an organic pigment, in particular a method for synergistically improving the dispersing performance of a nonionic dispersing agent on an organic pigment by using cellulase and amylase, and belongs to the technical field of textile printing and dyeing. Background technique [0002] Organic pigments are crystals formed by stacking non-polar molecules with aromatic rings as the skeleton. Most of the pigment particles are bonded to each other during the drying process in the production process to form aggregates. Direct use can affect the application properties of pigments such as coloring strength. , hiding power, transparency, etc. will have a serious impact. Therefore, it is necessary to adopt physical or chemical methods to effectively disperse the pigment, so that its particle size and particle size distribution become a stable dispersion system that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B67/46
CPCC09B67/0084C09B67/0091
Inventor 郝龙云杨超王蕊房宽峻蔡玉青
Owner QINGDAO UNIV