Gypsum particle dispersing agent and preparation method thereof

A dispersant and granule technology, applied in the field of gypsum particle dispersant and its preparation, can solve the problems of cumbersome operation and achieve the effect of low energy consumption, high efficiency and long-lasting structural stability

Inactive Publication Date: 2009-11-11
SHANGHAI SUNRISE CHEMISTRY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process requires the use of dispersant and auxiliary dispersant in the application process, and the operation is cumbersome

Method used

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  • Gypsum particle dispersing agent and preparation method thereof
  • Gypsum particle dispersing agent and preparation method thereof
  • Gypsum particle dispersing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Add 120g of GE-1 and 120g of deionized water into a 500ml four-necked flask equipped with a stirrer, a thermometer, and a dropping device, and stir to raise the temperature to 80°C. Add dropwise the monomer aqueous solution that is mixed with 19.4g maleic anhydride, 3.6g p-styrene sulfonate, 1.3g 2-mercaptopropionic acid, 90g deionized water and 10g of potassium persulfate aqueous solution 10wt%, dropwise time control In about 90 minutes, the reaction temperature was controlled at 78-85°C. After the dropwise addition, the temperature was kept for 45 minutes to complete the polymerization. Add 28.6g of 28wt% ammonia water to neutralize to about pH 6.5. The gypsum particle dispersant of the present invention is obtained, which is designated as PG-1.

Embodiment 2

[0033]Add 120g of GE-2 and 120g of deionized water into a 500ml four-necked flask equipped with a stirrer, a thermometer, and a dropping device, and stir to raise the temperature to 80°C. At the same time, 10 g of monomer aqueous solution and 10 wt % ammonium persulfate aqueous solution mixed with 25.6 g maleic anhydride, 1.2 g mercaptoethanol, 70 g deionized water and 10 g of ammonium persulfate aqueous solution were added dropwise, the dropping time was controlled at about 90 minutes, and the reaction temperature was controlled at 78-85 ℃. After the dropwise addition, the temperature was kept for 45 minutes to complete the polymerization. Add 30 g of 28 wt % ammonia water to neutralize to about pH 6.5. The polycarboxylate gypsum dispersant of the present invention is obtained, which is designated as PG-2.

Embodiment 3

[0035] Add 120g of GE-3 and 120g of deionized water into a 500ml four-neck flask equipped with a stirrer, a thermometer, and a dropping device, and stir to raise the temperature to 85°C. Simultaneously add dropwise the monomer aqueous solution that is mixed with 14.3g maleic anhydride, 0.8g mercaptoacetic acid, 70g deionized water and 10g of the potassium persulfate aqueous solution of 7.8g and 20wt%, and dropwise time is controlled at about 120 minutes, and reaction temperature Control at 83-88°C. After the dropwise addition was completed, the insulation was kept for 30 minutes to complete the polymerization. Add 19.5 g of 28 wt % ammonia water to neutralize to about pH 6.5. The gypsum particle dispersant of the present invention is obtained, which is designated as PG-3.

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Abstract

The invention discloses a gypsum particle dispersing agent and a preparation method thereof. The dispersing agent is obtained by copolymerizing unsaturated polyoxyalkylene ether monomer, unsaturated carboxylic acids and derivative monomers thereof and other monomers which can be copolymerized with the monomers under a radical polymerization system. The gypsum particle dispersing agent has the advantages of high water-reducing rate, stable structure, delayed coagulation and the like; and the preparation method thereof has low energy consumption, high efficiency and good repeat stability.

Description

technical field [0001] The invention relates to a dispersant and a preparation method thereof, in particular to a gypsum particle dispersant and a preparation method thereof. Background technique [0002] Gypsum raw materials are divided into natural gypsum and industrial by-product gypsum. With the development of industry and science and technology, according to the characteristics and application methods of gypsum. The use of gypsum can be roughly divided into two categories: the first gypsum is directly used without satin firing, mainly used to adjust cement condensation, nickel smelting, tofu solidification, optical instruments, gypsum casting molds, etc.; Mature gypsum, used in the production of building materials, ceramic models, dental materials, chalk, handicrafts, grinding glass, tofu solidification, etc. Among them, gypsum cementitious material is one of the three traditional cementitious materials. Its raw materials can be natural gypsum and industrial by-produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/24C08F283/06
Inventor 郑柏存冯中军傅乐峰张毅邓最亮
Owner SHANGHAI SUNRISE CHEMISTRY CO LTD
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