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Preparation method of phenolic ether polycarboxylate concrete slushing agent

A concrete water-reducing agent and polycarboxylic acid-based technology, which is applied in the field of concrete water-reducing agent preparation, can solve the problems of toxicity of the starting agent, easy gasification, overpressure of the reactor, etc., and achieves wide product adaptability and cement adaptability. Good performance and stable product performance

Inactive Publication Date: 2015-05-06
贵阳格瑞林建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Lipid polycarboxylate superplasticizers have disadvantages such as complicated process and difficult quality control, and are gradually replaced by ether polycarboxylate superplasticizers.
In the polyether-based polycarboxylate superplasticizer, in the polyether synthesis step, the polyether initiator monomer has a low boiling point and is easy to gasify, which may easily cause rapid overpressure and overheating of the reactor, and production accidents may easily occur. The starting agent also has certain toxicity and is harmful to health.
And in the synthesis of polyether, the distribution is not easy to control, which has a great influence on the follow-up

Method used

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  • Preparation method of phenolic ether polycarboxylate concrete slushing agent
  • Preparation method of phenolic ether polycarboxylate concrete slushing agent
  • Preparation method of phenolic ether polycarboxylate concrete slushing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Add 60.15 grams of 4-vinylphenol into the reactor, add 0.11 grams of potassium hydroxide, replace with nitrogen three times, raise the temperature to 110±5°C, turn on the vacuum pump to remove the moisture in the raw materials under the pressure of -0.099MPa, The dehydration time is 1 hour. After the dehydration step is completed, the raw material is cooled to 85±5°C, and 140.95 grams of ethylene oxide is introduced, and the pressure is controlled at 0.25±0.05MPa. The addition is completed in about 6 hours. Keep warm at ±5°C for 1 hour, complete the heat preservation, vacuum degas for 1 hour to remove unreacted traces of ethylene oxide, and then cool to obtain phenol ether monomer B 1 .

[0040] Put 10.45 grams of bottom water in a set of reactor equipped with a thermometer, agitator, dropper, nitrogen inlet pipe and reflux condensing device, turn on the nitrogen, fully exhaust the air, raise the temperature to 60±5°C, and start to drop the phenol ether Monomer B ...

example 2

[0043] Add 4-vinylphenol 35.15 into the reactor, add 2.9 grams of solid sodium methoxide, replace with nitrogen 3 times, raise the temperature to 110±5°C, turn on the vacuum pump to remove the moisture in the raw material and form methanol, the removal time is 1 hour. After the removal step is completed, the raw material is cooled to 85±5°C, and 1429.55 grams of ethylene oxide and propylene oxide mixture are introduced, and the pressure is controlled at 0.25±0.05MPa for 10 hours. After the addition is completed, keep it warm at 130±5°C for 1 hour. After the heat preservation is completed, vacuum degas for 1 hour to remove unreacted traces of ethylene oxide and then cool to obtain polyether monomer B. 2 .

[0044] 45.45 grams of bottom water are charged into a set of reactor equipped with thermometer, stirrer, dropper, nitrogen inlet pipe and reflux condensing device, polyether monomer B 2 60.20 grams, turn on the nitrogen, fully exhaust the air, after the polyether is dis...

example 3

[0047] Add 4-vinylphenol 50.15 into the reactor, add 0.24 grams of potassium hydroxide, replace with nitrogen for 3 times, raise the temperature to 110±5°C, turn on the vacuum pump to remove the moisture in the raw material under the pressure of -0.099MPa, and dehydrate The time is 1 hour. After the dehydration step is completed, the raw material is cooled to 85±5°C, and 367.25 grams of ethylene oxide is introduced, and the pressure is controlled at 0.25±0.05MPa. The addition is completed in about 7 hours. Keep warm at 5°C for 1 hour, complete the heat preservation, vacuum degas for 1 hour to remove unreacted traces of ethylene oxide, and then cool to obtain polyether monomer B 3 .

[0048] Add polyether monomer B into a set of reactor equipped with thermometer, stirrer, dropper, nitrogen inlet pipe and reflux condensing device 3 60.20 grams, 55.45 grams of deionized water, turn on the nitrogen, fully exhaust the air, raise the temperature to 60±5°C, start to drop a mixed...

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Abstract

The invention relates to a preparation method of a concrete slushing agent, in particular to a preparation method of a phenolic ether polycarboxylate concrete slushing agent. The preparation method comprises the following steps of: polymerizing a raw material A with high copolymerization activity and ethylene oxide and / or epoxypropane under base catalysis ro obtain polyether macromonomer, and introducing the synthesized polyether macromonomer into the main chain of polycarboxylic acid in the manner of free radical polymerization to finally obtain the phenolic ether polycarboxylate concrete slushing agent of which the main chain is provided with the benzene ring. The slushing agent has the advantages of high slushing, high collapse perversion and good concrete adaptability.

Description

technical field [0001] The invention relates to a preparation method of a concrete water-reducer, in particular to a preparation method of a phenol ether polycarboxylic acid-based concrete water-reducer. technical background [0002] With the development of the economy and the progress of the society, people put forward higher and higher requirements for construction, making concrete admixtures gradually become one of the indispensable building materials in engineering, and the water reducing agent is particularly important. Historically, before the appearance of polycarboxylic acid admixtures, there were lignosulfonate admixtures, naphthalene sulfonate formaldehyde condensation products, melamine formaldehyde condensation products, acetone sulfonate formaldehyde condensation products, sulfamic acid salts Formaldehyde condensates, etc., these products have certain advantages in cost, but there are still great deficiencies in high water reduction, high slump retention, workab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08G65/28C04B24/26C04B103/30
Inventor 刘翠枝徐久志陈晨张绪清
Owner 贵阳格瑞林建材科技有限公司
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