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High-polymer water reducing agent for ceramic concentrated suspension as well as preparation method and application of high-polymer water reducing agent

A suspension and polymer technology, applied in the field of ceramic additives, can solve the problems of slurry stability decline, narrow decondensation range, easy coagulation and sedimentation, etc., and achieve the effect of low equipment requirements, wide decondensation range, and less dosage

Inactive Publication Date: 2013-09-18
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects of the existing inorganic water reducing agent such as narrow decondensation range, high dosage, easy to reduce the stability of the slurry and easy to coagulate, the primary purpose of the present invention is to provide a low dosage, high water reducing rate and suspending High molecular weight superplasticizer for good ceramic concentrated suspension, the superplasticizer has wide decondensation range, stable slurry and good fluidity

Method used

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  • High-polymer water reducing agent for ceramic concentrated suspension as well as preparation method and application of high-polymer water reducing agent
  • High-polymer water reducing agent for ceramic concentrated suspension as well as preparation method and application of high-polymer water reducing agent
  • High-polymer water reducing agent for ceramic concentrated suspension as well as preparation method and application of high-polymer water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A polymer water reducer for ceramic concentrated suspension, prepared by the following method:

[0031] Weigh 158g of acrylic acid, 52g of 2-acrylamide-2-methylpropanesulfonic acid and 19.5g of maleic anhydride into a three-necked flask, dissolve with 300g of distilled water, and then add dropwise a 50% sodium hydroxide solution to mix The pH value of the solution is 7, add 36.7g of chain transfer agent sodium bisulfite, and keep stirring to raise the temperature. When the temperature rises to 80°C, dissolve 2.98g of ammonium persulfate with distilled water and pour it into a constant pressure dropping funnel and slowly add Put it into a three-necked flask and react at constant temperature for 3 hours to obtain a polymer water reducer.

[0032] After the obtained polymer water reducer is separated and purified, its infrared spectrum is measured by the method of KBr pressing, IR (KBr) (wavenumber, cm -1 ):3436(-OH),

[0033] 2946(-CH 2 ), 1660(C=O), 1568, 1458(-COO -...

Embodiment 2

[0039] A polymer water reducer for ceramic concentrated suspension, prepared by the following method:

[0040] Weigh 168g of acrylic acid, 28g of 2-acrylamide-2-methylpropanesulfonic acid and 14g of maleic anhydride into a three-necked flask, dissolve with 300g of distilled water, and dropwise add a 40% sodium hydroxide solution to make the mixture The pH value of the solution is 8, add 25.2g of chain transfer agent sodium bisulfite, and keep stirring to raise the temperature. When the temperature rises to 100°C, dissolve 2.98g of ammonium persulfate with distilled water and pour it into a constant pressure dropping funnel and slowly add it to In the three-necked flask, after constant temperature reaction for 4 hours, the polymer water reducer was obtained.

[0041] After the obtained polymer water reducer is separated and purified, its infrared spectrum is measured by the method of KBr pressing, IR (KBr) (wavenumber, cm -1 ):3439(-OH),

[0042] 2944(-CH 2 ),1660(C=O),1565,...

Embodiment 3

[0047] A polymer water reducer for ceramic concentrated suspension, prepared by the following method:

[0048] Weigh 160g of acrylic acid, 40g of 2-acrylamide-2-methylpropanesulfonic acid and 20g of maleic anhydride into a three-neck flask, dissolve with 400g of distilled water, and dropwise add a 40% mass fraction of sodium hydroxide solution to make the mixture The pH value of the solution is 8, add 22g of chain transfer agent sodium bisulfite, and keep stirring to raise the temperature. When the temperature rises to 80°C, dissolve 1.98g of ammonium persulfate with distilled water and pour it into a constant pressure dropping funnel and slowly drop it into the three In the flask, after constant temperature reaction for 5 hours, the polymer water reducer was obtained.

[0049] After the obtained polymer water reducer is separated and purified, its infrared spectrum is measured by the method of KBr pressing, IR (KBr) (wavenumber, cm -1 ):3437(-OH),

[0050] 2946(-CH 2 ), 1660...

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Abstract

The invention discloses a high-polymer water reducing agent for a ceramic concentrated suspension as well as a preparation method and application of the high-polymer water reducing agent. The structure of the water reducing agent is as shown in a formula. The water reducing agent is prepared through the following steps of: dissolving acrylic acid, maleic anhydride and 2-acrylamide-2-methylpropane sulfonic acid in distilled water to form a mixed solution; adjusting the pH value of the mixed solution to be 7-8; adding an inorganic chain transfer agent and then heating to 80-100 DEG C; dropwise adding an initiating agent; reacting for 3-5 hours to obtain the high-polymer water reducing agent for the ceramic concentrated suspension. By adopting the high-polymer water reducing agent, under the condition that the added amount is low and the fluidity of ceramic slurry is good, so that the water reducing agent can meet requirements for ceramic production and processing. The high-polymer water reducing agent prepared by the method has the advantage of high water reducing rate, and not only ensures that the water content of the slurry is less than 30%, but also can keep good fluidity of the slurry.

Description

technical field [0001] The invention belongs to the field of ceramic additives, and in particular relates to a high-molecular water reducer for ceramic concentrated suspensions, a preparation method and application thereof. Background technique [0002] Ceramic superplasticizer is a kind of ceramic additive widely used at present. After use, it can reduce the water content of the slurry as much as possible and achieve the required fluidity. In the process of ceramic production and manufacturing, although the required fluidity can be achieved with an increase in water consumption, the suspension of the ceramic slurry will be deteriorated, and it will be unstable and easy to settle. Therefore, the use of excellent water reducer can increase the fluidity of the ceramic slurry and also increase the stability of the slurry. [0003] At present, the common water reducers commonly used in the ceramic industry are mostly inorganic salts or compounds of inorganic salts and small org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/634C08F220/06C08F222/06C08F220/58
Inventor 庞浩黄清泉廖兵黄健恒计红果邓理
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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