Disperse dyestuff microcapsule and preparation method thereof

A technology of disperse dyes and microcapsules, which is applied in the direction of organic dyes, etc., can solve the problems of reducing the solvent resistance of dye microcapsules, large voids in melamine resin, and leakage of core materials, so as to avoid dye leakage, low cost, and easy operation Effect

Active Publication Date: 2018-07-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the melamine resin prepared by this method has large voids, so when the melamine resin is used as a microcapsule wall material, its compactness is poor, which easily leads to leakage of the core material and reduces the solvent resistance of the dye microcapsules

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of disperse dye microcapsules:

[0043] (1) 12.6g melamine and 20.27g concentration are 37%wt% formaldehyde solution (density 1.09~1.11g / ml, purity is 37 ± 2%) are placed in three-necked flask (the molar ratio of melamine and formaldehyde is 1: 2.5), mix evenly to obtain a mixed solution, heat in a water bath to 70°C, keep warm, add 10% sodium carbonate solution dropwise, so that the mixed solution always maintains a weak alkalinity with a pH value of 8-9, and maintain the reaction for 5 minutes until the melamine is completely dissolved After that, a clear and transparent aqueous solution of melamine resin was obtained.

[0044] (2) Dissolve 2g of Disperse Blue 2BLN in 40g of toluene solvent to obtain a dye toluene solution, and then slowly add the dye toluene solution dropwise into 800ml of distilled water under stirring at a high speed (3000rpm) of an emulsifier to make the fine particles The dye is recrystallized in distilled water, filtered, and the fi...

Embodiment 2

[0048] Preparation of disperse dye microcapsules:

[0049] (1) 12.6g melamine and 24.32g concentration are 37%wt% formaldehyde solution (density 1.09~1.11g / ml, purity is 37 ± 2%) are placed in three-necked flask (the molar ratio of melamine and formaldehyde is 1: 3.0), mix evenly to obtain a mixed solution, heat in a water bath to 70°C, keep warm, add 10% sodium carbonate solution dropwise, so that the mixed solution always maintains a weak alkalinity with a pH value of 8-9, and maintain the reaction for 40 minutes until the melamine is completely dissolved After that, a clear and transparent aqueous solution of melamine resin was obtained.

[0050](2) Dissolve 2 g of Disperse Violet 93 in 300 g of toluene solvent to obtain a dye toluene solution, and then slowly add the dye toluene solution dropwise into 2000 ml of distilled water under stirring at a high speed (10,000 rpm) of an emulsifier to make the fine particles The dye is recrystallized in distilled water, filtered, an...

Embodiment 3

[0054] Preparation of disperse dye microcapsules:

[0055] (1) 12.6g melamine and 28.38g concentration are 37%wt% formaldehyde solution (density 1.09~1.11g / ml, purity is 37 ± 2%) are placed in three-necked flask (the molar ratio of melamine and formaldehyde is 1: 3.5), mix evenly to obtain a mixed solution, heat in a water bath to 70°C, keep warm, add 10% sodium carbonate solution dropwise, so that the mixed solution always maintains a weak alkalinity with a pH value of 8-9, and maintain the reaction for 25 minutes until the melamine is completely dissolved After that, a clear and transparent aqueous solution of melamine resin was obtained.

[0056] (2) Dissolve 2 g of Disperse Yellow 104 in 160 g of toluene solvent to obtain a dye toluene solution, and then slowly add the dye toluene solution dropwise into 1000 ml of distilled water under stirring at a high speed (4000 rpm) of an emulsifier to make the fine particles The dye is recrystallized in distilled water, filtered, an...

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PUM

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Abstract

The invention belongs to the technical field of microcapsules, and in particular relates to a disperse dyestuff microcapsule and a preparation method thereof. The method provided by the invention firstly takes a fine-particle disperse dyestuff as a core material and takes melamine resin obtained by taking melamine and formaldehyde to react as a wall material to prepare the disperse dyestuff microcapsule; then the wall material melamine resin is subjected to silazane treatment to remove hydroxyl on the melamine resin, and the melamine resin wall material is further sealed, so that a condition that the dyestuff of the disperse dyestuff microcapsule in a solvent is leaked is avoided and the solvent resistance of the dyestuff microcapsule is enhanced. The method has the advantages of no pollution, few auxiliary agents, low cost and convenience for operation, and the obtained dyestuff microcapsule has high stability.

Description

technical field [0001] The invention belongs to the technical field of microcapsules, and in particular relates to a disperse dye microcapsule and a preparation method thereof. Background technique [0002] Disperse dyes are non-ionic dyes with strong hydrophobicity, which are mainly used for dyeing polyester fibers. At present, there are more than 2,000 kinds of disperse dyes, and they are one of the fastest-growing dye varieties in modern times. However, disperse dyes have the disadvantage of being intolerant to solvents, which greatly affects the storage and use of dyes. Microcapsule technology is a technology that completely encapsulates dispersed solid, liquid or gas core materials in a dense film, isolates the core material from the outside, protects its original performance, and releases the core material during use. Applying the microcapsule technology to the field of disperse dyes, encapsulating the dyes can greatly improve the defect of the dye itself that is not ...

Claims

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Application Information

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IPC IPC(8): C09B67/02C09B67/38
CPCC09B67/008C09B67/0097
Inventor 潘朝群
Owner SOUTH CHINA UNIV OF TECH
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