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Method for preparing stable-dispersibility pigment/polymer core-shell structure composite granules by using by polymer-wrapped pigment particles

A technology for coating pigments and core-shell structures, which is applied in the treatment of dyed polymer organic compounds, organic dyes, fibrous fillers, etc., can solve the problems of incomplete coating, low coating efficiency, etc. Effect of preventing phase separation, improving dispersibility and dispersion stability

Active Publication Date: 2012-09-12
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies of the prior art, the present invention proposes a method for preparing polymer-coated pigment particles to form stable dispersible pigment / polymer core-shell composite particles, which solves the problem of existing polymer-coated pigment particle surfaces. In the process of improving its dispersibility and dispersion stability, the inhibition effect of pigment particles on free radicals and the low coating efficiency caused by the re-agglomeration of pigment particles have the disadvantages of incomplete coating.

Method used

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  • Method for preparing stable-dispersibility pigment/polymer core-shell structure composite granules by using by polymer-wrapped pigment particles
  • Method for preparing stable-dispersibility pigment/polymer core-shell structure composite granules by using by polymer-wrapped pigment particles
  • Method for preparing stable-dispersibility pigment/polymer core-shell structure composite granules by using by polymer-wrapped pigment particles

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Example 1: Preparation of carbon black / polymer composite particles without emulsifier

[0040] Add 30mL of water, 0.15g of 1,1-diphenylethylene, 0.8g of acrylic acid, and 1.6g of n-butyl acrylate into a 150mL three-necked flask equipped with an electric stirrer, a condenser tube and a thermometer, and mechanically stir at 300r / min Under heating, the temperature was raised to 80° C., and 10 g of 1.5 wt % potassium persulfate aqueous solution was added to initiate the polymerization reaction. Add 0.8g of carbon black to a beaker containing 30mL of water, use the KQ-300DE ultrasonic instrument produced by Kunshan Ultrasonic Instrument Co., Ltd., and ultrasonically disperse for 30min under the condition of output power of 80%, and in the above polymer precursor synthesis system After 40 minutes of reaction, the ultrasonically dispersed carbon black dispersion was slowly added dropwise to the system within 10 minutes, and the reaction was continued at 80°C for 3 hours, and t...

Embodiment 2

[0041] Embodiment 2: Preparation of carbon black / polymer composite particles, using sodium lauryl sulfate as emulsifier

[0042] Add 30mL of water, 0.15g of 1,1-diphenylethylene, 0.6g of acrylic acid, and 1.8g of n-butyl acrylate into a 150mL three-necked flask equipped with an electric stirrer, a condenser tube and a thermometer, and mechanically stir at 300r / min Under heating, the temperature was raised to 80° C., and 10 g of 1.5 wt % potassium persulfate aqueous solution was added to initiate the polymerization reaction. Add 0.8g of carbon black to a beaker containing 30mL of water, use the KQ-300DE ultrasonic instrument produced by Kunshan Ultrasonic Instrument Co., Ltd., and ultrasonically disperse for 30min under the condition of output power of 80%, and in the above polymer precursor synthesis system After 1.5 hours of reaction, the ultrasonically dispersed carbon black dispersion was slowly added dropwise to the system within 10 minutes, and the reaction was continued ...

Embodiment 3

[0043] Embodiment 3: Preparation of carbon black / polymer composite particles, using cetyl ammonium bromide as emulsifier

[0044] Add 30mL of water, 0.15g of 1,1-diphenylethylene, 1.2g of acrylic acid, and 1.2g of n-butyl acrylate into a 150mL three-necked flask equipped with an electric stirrer, a condenser tube and a thermometer, and mechanically stir at 300r / min Under heating, the temperature was raised to 80° C., and 10 g of 1.5 wt % potassium persulfate aqueous solution was added to initiate the polymerization reaction. Add 0.8g of carbon black to a beaker containing 30mL of water, use the KQ-300DE ultrasonic instrument produced by Kunshan Ultrasonic Instrument Co., Ltd., and ultrasonically disperse for 30min under the condition of output power of 80%, and in the above polymer precursor synthesis system After 40 minutes of reaction, the ultrasonically dispersed carbon black dispersion was slowly added dropwise to the system within 10 minutes, and the reaction was continue...

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Abstract

The invention relates to a method for preparing stable-dispersibility pigment / polymer core-shell structure composite granules by using polymer-wrapped pigment particles. The method comprises the following steps of: preparing an amphipathic macromolecular dispersing agent by the soap-free emulsion polymerization in the presence of 1,1-diphenyl ethylene (DPE); adding pigment particle disperse liquid subjected to ultrasonic dispersion into a system; and heating the pigment particle disperse system to the temperature of 80 DEG C again, wherein the surface of the pigment particle disperse system is grafted, and an amphipathic macromolecular dispersing agent is adsorbed to the surface of the pigment particle disperse system, dripping a hard monomer into the system, grafting, and triggering the hard monomer added into the system to perform in-situ polymerization on the surfaces of the pigment particles to form a polymer shell layer by amphipathic macromolecules which are adsorbed to the surfaces of the pigment particles and contain DPE active structures. The appearance and the surface macromolecular shell layer of the pigment / polymer core-shell structure composite granules are subjected to characterization by using a transmission electron microscope, an ultraviolet absorption spectrum, nuclear magnetic resonance hydrogen, a carbon spectrum and a thermogravimetric analyzer.

Description

technical field [0001] The invention relates to a method for preparing pigment / polymer core-shell structure composite particles with stable dispersion by coating pigment particles with polymers. The pigment / polymer core-shell structure composite particles formed by the method have good dispersion stability. And the surface modification of the polymer shell layer can be realized by changing the type of hard monomer to realize the oil or water phase dispersion of the pigment / polymer composite particles. Background technique [0002] Pigment particles are widely used as toners in coatings, inks, toners and other fields to beautify the environment. In recent years, improving the printing fineness and printing efficiency of the printing industry has become the mainstream of industry technology improvement. Due to the smaller size of nanoscale pigments, it is extremely beneficial to improve the fineness of color rendering of pigments. However, nano-pigment particles with an init...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F220/18C08F220/06C08F212/32C08F212/08C08F220/14C08F2/24C09C1/56C09C3/10C09C3/04C09B67/00C09B67/04
Inventor 张秋禹周艳阳张和鹏尹德忠吴寅刘亚莉
Owner NORTHWESTERN POLYTECHNICAL UNIV
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