Anti-flocculating agent, preparation method and application thereof

A technology of deflocculants and initiators, applied in the field of deflocculants and their preparation, can solve problems such as poor fluidity and increased viscosity of concrete, and achieve the effects of improved fluidity, stable structure, and unfavorable performance

Active Publication Date: 2021-12-10
JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome defects such as increased viscosity and poor fluidi

Method used

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  • Anti-flocculating agent, preparation method and application thereof
  • Anti-flocculating agent, preparation method and application thereof
  • Anti-flocculating agent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a preparation method of a deflocculant, comprising the following steps,

[0047] Introduce nitrogen into the reaction kettle, dry the water in the reaction kettle, add 446.26kg epichlorohydrin, control the temperature of the material at 50±2°C; mix 132.61kg deionized water, 1.21kg potassium hydroxide and 285.72kg acrylamide Mix and stir to dissolve to form a mixed solution A for later use; control the rate of addition, so that the mixed solution A is evenly added dropwise to the reactor, the dropping time is 60 minutes, and react at 55±5°C for 60 minutes after the dropping; then add Adjust the pH to 4-5 with 4.02L of hydrochloric acid, add 549.12kg of 33% dimethylamine aqueous solution evenly in the reaction kettle, the time of dropping is 60min, react at 65±5℃ for 60min after the addition, and then add 12.20L of hydrochloric acid Stir evenly, and adjust the pH to obtain a cationic monomer-containing solution. The solid content of the cationic m...

Embodiment 2

[0050] This embodiment provides a kind of preparation method of deflocculant, and the preparation method of cationic monomer is the same as embodiment 1, comprises the following steps,

[0051] Add 127.27kg of deionized water into a reaction kettle, and control its temperature at 50±2°C; mix 142.54kg of deionized water and 52.43kg of ammonium persulfate, and stir to dissolve it to form a uniform mixed solution B; Ionized water, 323.19kg of cationic monomer solution, 264.33kg of methacryloyloxyethyltrimethylammonium chloride, 14.64kg of mercaptopropionic acid and 11.96kg of sodium bisulfite were mixed and stirred to dissolve to form a uniform mixed solution C: Add the mixed solution B and the mixed solution C in the reaction kettle dropwise, and the dropping time is 120 minutes. After the dropping, react at 55±5°C for 2 hours to obtain the deflocculant.

Embodiment 3

[0053] This embodiment provides a kind of preparation method of deflocculant, and the preparation method of cationic monomer is the same as embodiment 1, comprises the following steps,

[0054] Add 134.83kg of deionized water into a reaction kettle, and control its temperature at 50±2°C; mix 151.00kg of deionized water and 55.55kg of ammonium persulfate, and stir to dissolve it to form a uniform mixed solution B; Ionized water, 171.23kg cationic monomer solution, 14.02kg styrene, 140.02kg methacryloxyethyltrimethylammonium chloride, 181.68kg dimethyl diallyl ammonium chloride solution (dimethyl diallyl The solid content of allyl ammonium chloride is 60%), 15.50kg mercaptopropionic acid and 12.67kg sodium bisulfite mix, stir and make it dissolve to form uniform mixed solution C; In reactor, drop mixed solution B and mix For solution C, the dropping time is 120 minutes. After the dropping, react at 55±5°C for 2 hours to obtain the deflocculant.

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Abstract

The invention belongs to the technical field of preparation of building material admixtures, and particularly relates to an anti-flocculating agent, a preparation method and application thereof. According to the invention, when the anti-flocculating agentis used in concrete, the problems that the viscosity of the concrete becomes large and the fluidity becomes poor after a flocculating agent is added into the concrete can be solved, the addition of the anti-flocculating agenthas no influence on the performance of the concrete, and in the use process, crystals cannot be separated out in the using process, the water solubility is good, and the structure is stable; and when silt in concrete is settled by a flocculating agent, the flocculating agent in the water phase of the concrete can be removed by the anti-flocculating agent, so that the problem that the flocculating agent is unfavorable for the performance of the concrete is fundamentally solved.

Description

technical field [0001] The invention belongs to the technical field of preparation of building material admixtures, and in particular relates to a deflocculant and its preparation method and application. Background technique [0002] With the rapid development of my country's infrastructure industry, a large number of natural sand resources have been exhausted. In recent years, the government has increasingly strengthened the protection of the environment, and illegal mining of river sand by individuals is strictly prohibited. At present, sand mining in China's rivers is composed of two parts. One is to specify the area where sand can be mined, setting the recoverable area, recoverable period and recoverable volume; the other is to dredge and dredge river channels. To be formulated as a supplementary sand source for natural sand. This is undoubtedly a drop in the bucket for my country's annual sand demand of tens of billions of tons. [0003] The use of machine-made sand ...

Claims

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Application Information

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IPC IPC(8): C08F220/60C08F226/04C08F220/34C08F212/08C04B24/26
CPCC08F220/603C04B24/2652C04B24/2688C08F226/04C08F220/34C08F212/08Y02W30/91
Inventor 仝浩胜何新耀李玉博
Owner JIAHUA CHEM TECH DEV SHANGHAI CO LTD
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