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Ceramic pigment waterborne dispersant and preparation method thereof

A technology of water-based dispersants and ceramic pigments, which is applied in the field of inkjet inks and organic/inorganic composite functional materials, can solve the problems of molecular structure, inability to adapt to size, different charged properties of nanoparticles, inability to effectively repel and disperse, etc., to achieve The effect of improving anchoring ability, good homogeneity, and strong surface binding ability

Inactive Publication Date: 2018-03-13
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Common inorganic dispersants do not have steric hindrance, limited repulsion ability, and cannot effectively repel dispersion; while common polymer dispersants are mostly used in other industries, their molecular structure and size cannot adapt to the application system of ceramic pigment nanoparticles; In addition, according to the Zeta potential measurement, the chargeability of the ceramic pigment nanoparticles is different, and the anion and cation zwitterions can be used to anchor on the surface, and the electrostatic repulsion and steric hindrance are used to disperse, and the dispersion adaptability is effectively improved.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Prepare ether amphoteric polycarboxylate dispersant, the semi-finished product mass fraction is 40%, the preparation method is as follows:

[0040] 1. Mix 360 parts of allyl polyoxyethylene ether polyether macromonomer with a molecular weight of 3600~5000, 1.0 parts of sodium hypophosphite monohydrate, and 3.0 parts of vinyl with a mass ratio of double bond-containing silane coupling agent of 1:1. The composition of trimethylsilane and γ-methacryloxypropyltrimethoxysilane and 300 parts of water are added to the reaction kettle, and stirred to dissolve it;

[0041] 2. Measure the temperature in the kettle and control the temperature at 25°C. After the temperature is stable, add 3.5 parts of ammonium persulfate at one time;

[0042] 3. After adding ammonium persulfate for 5 minutes, start to drop the initiator and the small monomer solution in sequence. After the initiator is added, start to add the small monomer solution dropwise within 10 minutes. The small mono...

Embodiment 2

[0053] Step 1: Prepare ether amphoteric polycarboxylate dispersant, the semi-finished product mass fraction is 40%, the preparation method is as follows:

[0054] 1. Mix 361 parts of methallyl polyoxyethylene ether polyether macromonomer, 1.6 parts of sodium hypophosphite monohydrate, and 1.2 parts of vinyltrimethyl silane coupling agent containing double bonds in a mass ratio of 1:1 The composition of silane and γ-methacryloxypropyltrimethoxysilane and 200 parts of water are added to the reaction kettle, stirred to dissolve;

[0055] 2. Measure the temperature in the kettle and control the temperature at 22°C. After the temperature is stable, add 2.5 parts of ammonium persulfate at one time;

[0056] 3. After adding ammonium persulfate for 5 minutes, start to drop the initiator and the small monomer solution in sequence. After the initiator is added, start to add the small monomer solution dropwise within 10 minutes. The small monomer solution is added for 3 hours. The dripp...

Embodiment 3

[0067] Step 1: Prepare ether amphoteric polycarboxylate dispersant, the semi-finished product mass fraction is 40%, the preparation method is as follows:

[0068] 1. Mix 363 parts of vinyl butyl ether polyoxyethylene ether polyether macromonomer, 2.1 parts of sodium hypophosphite monohydrate, and 1.5 parts of vinyl trimethyl with double bond-containing silane coupling agent in a mass ratio of 1:1 The composition of silane and γ-methacryloxypropyl trimethoxysilane and 250 parts of water are added to the reaction kettle, stirred to dissolve;

[0069] 2. Measure the temperature in the kettle and control the temperature at 19°C. After the temperature is stable, add 2.0 parts of ammonium persulfate at one time;

[0070] 3. After adding ammonium persulfate for 5 minutes, start to drop the initiator and the small monomer solution in sequence. After the initiator is added, start to add the small monomer solution dropwise within 10 minutes. The small monomer solution is added for 3 hou...

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PUM

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Abstract

The invention provides a ceramic pigment waterborne dispersant and a preparation method thereof. The dispersant comprises, by weight, 60-85 parts of ether amphoteric polycarboxylate-type dispersant, 5-15 parts of wetting agent, 10-20 parts of suspending agent, 0.2-0.5 part of pH value buffering agent, 0.05-0.3 part of viscosity modifier and water. The preparation method includes following steps: mixing and stirring the ether amphoteric polycarboxylate-type dispersant, the wetting agent, the suspending agent, the pH value buffering agent and the viscosity modifier proportionally; sufficiently homogenizing to obtain the dispersant of 40% in mass percent. The ceramic pigment waterborne dispersant is adsorbed on the surfaces of ceramic pigment particles under assistance of the wetting agent through phosphate group, isocyanate end group and silane coupling agent hydrolysis oligomer and under action of ion bond, covalent bond, hydrogen bond and Van der Waals' force by means of single-point or multiple-point anchoring, and when distance between particle surfaces is smaller than two times of length of a long chain branch, steric-hindrance effect is generated between two adsorption layers.

Description

Technical field: [0001] The invention relates to the technical field of organic / inorganic composite functional materials, in particular to the technical field of inkjet inks, and in particular to a ceramic pigment water-based dispersant and a preparation method thereof. Background technique: [0002] Using inkjet printing technology and computer technology, first prepare ceramic pigments into ceramic ink, and then use nozzles with a diameter of about tens of microns to eject small ink droplets from the nozzles and deposit them on the carrier at high speed, similar to the principle of printing. In this way, any complex design and color can be printed on the surface of glass and ceramics, thereby arbitrarily decorating the surface of inorganic materials such as glass ceramics. Compared with roller printing and screen printing, inkjet printing has the characteristics of high precision and high definition. The core part of inkjet printing is ceramic ink, and the core part of ce...

Claims

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Application Information

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IPC IPC(8): C09D11/38C08F283/06C08F230/08C08F220/06C08F226/04C08F220/34
CPCC09D11/38C08F283/065C08F230/08C08F220/34
Inventor 柯凯文帅涛常鹰
Owner HUBEI UNIV OF TECH