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Preparation method of water reducer used for electronic ceramic spray granulation slurry

A technology of spray granulation and electronic ceramics, which is applied in the field of preparation of water reducer for slurry of electronic ceramic spray granulation. performance effect

Inactive Publication Date: 2014-01-22
CHINA XD ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main problem is that the molecular weight of the control adjustment is not suitable, which causes the dispersion of the water reducing agent to be unstable.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of the water reducer for the electronic ceramic spray granulation slurry comprises the following steps:

[0022] 1) Weigh 7.0% acrylic acid, 10.8% concentrated ammonia water, 1.02% hydrogen peroxide solution, 79.1% water, 2.0779% isopropanol and 0.0021% hydroquinone according to mole percentage;

[0023] 2) adding acrylic acid into the reaction kettle, and then adding a part of concentrated ammonia water into the reaction kettle to obtain a neutralizing solution;

[0024] 3) Add isopropanol, water and a part of hydrogen peroxide solution into the neutralizing solution, stir evenly and heat to 60°C, then add the remaining hydrogen peroxide solution dropwise, and then heat to 90°C and keep warm for 5 hour, to get the polymerization solution wherein, the remaining hydrogen peroxide solution was added dropwise for 1.5 hours;

[0025] 4) After reducing the temperature of the polymerization solution to 20°C, add hydroquinone while stirring, and then ad...

Embodiment 2

[0031] The preparation method of the water reducer for the electronic ceramic spray granulation slurry comprises the following steps:

[0032] 1) Weigh 7.2% acrylic acid, 10.2277% concentrated ammonia water, 1.07% hydrogen peroxide solution, 79.5% water, 2.0% isopropanol and 0.0023% hydroquinone according to mole percentage;

[0033] 2) adding acrylic acid into the reaction kettle, and then adding a part of concentrated ammonia water into the reaction kettle to obtain a neutralizing solution;

[0034] 3) Add isopropanol, water and a part of hydrogen peroxide solution into the neutralizing solution, stir evenly and heat to 64°C, then add the remaining hydrogen peroxide solution dropwise, and then heat to 94°C and keep warm for 3 hour, to get the polymerization solution wherein, the remaining hydrogen peroxide solution was added dropwise for 1.2 hours;

[0035] 4) After lowering the temperature of the polymerization solution to 25°C, add hydroquinone while stirring, and then ad...

Embodiment 3

[0041] The preparation method of the water reducer for the electronic ceramic spray granulation slurry comprises the following steps:

[0042] 1) Weigh 7.1% of acrylic acid, 10.548% of concentrated ammonia water, 1.05% of hydrogen peroxide solution, 79.4% of water, 1.9% of isopropanol and 0.002% of hydroquinone according to mole percentage;

[0043] 2) adding acrylic acid into the reaction kettle, and then adding a part of concentrated ammonia water into the reaction kettle to obtain a neutralizing solution;

[0044] 3) Add isopropanol, water and a part of hydrogen peroxide solution into the neutralizing solution, stir evenly and heat to 65°C, then add the remaining hydrogen peroxide solution dropwise, and then heat to 93°C and keep warm for 4 hour, to get the polymerization solution wherein, the remaining hydrogen peroxide solution was added dropwise for 1 hour;

[0045] 4) After reducing the temperature of the polymerization solution to 23°C, add hydroquinone while stirring...

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Abstract

The invention discloses a preparation method of a water reducer used for electronic ceramic spray granulation slurry. The method comprises steps of: 1) weighing 7.0-7.2% of acrylic acid, 10.2-10.8% of concentrated aqueous ammonia, 1.02-1.07% of a hydrogen dioxide solution, 79.0-79.5% of water, 1.9-2.1% of isopropanol and 0.0021-0.0023% of hydroquinone according to a molar ratio; 2) adding the acrylic acid into a reactor, and adding a portion of the concreted aqueous ammonia to obtain a neutralized solution; 3) adding the isopropanol, the water, and a portion of the hydrogen dioxide solution into the neutralized solution, stirring uniformly, heating to 60-65 DEG C, then adding dropwise the rest of the hydrogen dioxide solution, and heating to 90-94 DEG C after the addition of the hydrogen dioxide solution is finished, and maintaining the temperature to obtain a polymerization solution; and 4) after the temperature of the polymerization solution is lowered to 20-25 DEG C, adding the hydroquinone dropwise under stirring, then adding dropwise the rest of the concentrated aqueous ammonia, and stirring uniformly after the addition of the concentrated aqueous ammonia is finished to obtain the water reducer used for the electronic ceramic spray granulation slurry. The water reducer prepared by the method is strong in dispersion force.

Description

technical field [0001] The invention relates to a preparation method of a water reducer, in particular to a preparation method of a water reducer for electronic ceramic spray granulation slurry. Background technique [0002] The production of modern technical ceramics, such as sensitive components such as zinc oxide varistors, thermistors, ceramic capacitors, magnetic components, alumina fine ceramics, etc., adopts advanced spray drying granulation and dry pressing or isostatic pressing at home and abroad. Molding process to improve product quality and save energy. First of all, spray-drying granulation needs to use micropowder raw materials with particles of about 1μ to prepare an aqueous solution mixture slurry with a solid content higher than about 65% and good fluidity and stability. If such substances as water reducers are not used, generally only slurry with a solid content of about 35% and a moisture content of more than 60% can be prepared. This not only consumes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F120/06C08F4/30C04B35/634
Inventor 侯建峰戴洁梅岳功轩刘德建潘劼
Owner CHINA XD ELECTRIC CO LTD
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