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Polycarboxylate superplasticizer based on 6C polyether macromonomer and preparation method thereof

A technology of polyether macromonomer and polycarboxylic acid, which is applied in the field of polycarboxylate water reducer and its preparation, can solve the problems of high cost, insufficient performance, and long time consumption, and achieve improved conversion rate, good adaptability, and reduced cost effect

Pending Publication Date: 2021-08-13
四川鸿鹏新材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The current polycarboxylate water reducer has the problems of long time consumption, high cost and insufficient performance in the preparation process

Method used

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  • Polycarboxylate superplasticizer based on 6C polyether macromonomer and preparation method thereof
  • Polycarboxylate superplasticizer based on 6C polyether macromonomer and preparation method thereof
  • Polycarboxylate superplasticizer based on 6C polyether macromonomer and preparation method thereof

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preparation example Construction

[0050] The second, the present invention provides a kind of preparation method of the polycarboxylate water-reducer based on 6C polyether macromonomer, comprises the steps:

[0051] Dissolve diethylene glycol monovinyl ether in water, add iron oxide for mixing, then add acrylic acid monomer solution and chain transfer agent solution dropwise at the same time, and keep warm during the dropping process to obtain polycarboxylate water reducer.

[0052] The specific preparation method is as follows. Add diethylene glycol monovinyl ether macromonomer and water into a reactor with a thermometer, gradually lower the temperature and stir until dissolved. When the base ether macromonomer is completely dissolved, add iron oxide, mix and stir for 20 to 30 minutes, add the oxidant after mixing evenly, mix and stir for 5 to 10 minutes, and at the same time dropwise add the acrylic monomer solution and the chain transfer agent solution at a uniform speed, drop During the process, the temper...

Embodiment 1

[0061] The preparation method of the polycarboxylate water reducer based on 6C polyether macromonomer, the specific steps are:

[0062] (1) Acrylic acid monomer solution (acrylic acid 3.66g, acrylamide 0.12g, allyl sodium sulfonate 0.07g and distilled water 14.38g) and chain transfer agent solution (ascorbic acid 0.024g, thioglycolic acid 0.206g and distilled water were prepared respectively) 18.8792g) for use;

[0063] (2) Add 36.02g of macromonomer (EPEG) and 15.31g of distilled water into a three-necked flask equipped with a thermometer. At room temperature, gradually control the temperature and stir to dissolve. When the temperature is controlled to 10°C and the macromonomer is completely dissolved, Add 0.005g of ferric oxide and 3g of water, mix and stir for 20min, then add 0.25g of hydrogen peroxide and 0.5g of water, after mixing evenly, add acrylic acid monomer solution dropwise at a constant speed (40min) and chain The transfer agent solution (70min dripping), the ho...

Embodiment 2

[0065] The preparation method of the polycarboxylate water reducer based on 6C polyether macromonomer, the specific steps are:

[0066] (1) Acrylic acid monomer solution (acrylic acid 3.56g, acrylamide 0.16g, allyl sodium sulfonate 0.14g and distilled water 14.38g) and chain transfer agent solution (ascorbic acid 0.042g, thioglycolic acid 0.1066g and distilled water were prepared respectively) 18.89g) for use;

[0067] (2) Add 30.0211g of macromonomer (EPEG) and 15.95g of distilled water into a three-necked flask equipped with a thermometer. At room temperature, gradually control the temperature and stir to dissolve. When the temperature is controlled to 15°C and the macromonomer is completely dissolved, Add 0.015g of ferric oxide and 2g of water, mix and stir for 20min, then add 0.25g of hydrogen peroxide and 0.5g of water, after mixing evenly, add the acrylic acid monomer solution (dropping in 42min) and chain The transfer agent solution (dropped in 72 minutes), the holding...

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Abstract

The invention relates to the technical field of concrete admixtures, and discloses a polycarboxylate superplasticizer based on a 6C polyether macromonomer and a preparation method thereof, the polycarboxylate superplasticizer is prepared from the following raw material components through a chain transfer reaction: an acrylic monomer and diethylene glycol monovinyl ether, the molar mass ratio of the acrylic monomer to the diethylene glycol monovinyl ether is 3.5-5.5: 1; a catalyst used in the reaction is iron oxide, the iron oxide comprises ferric oxide and / or ferroferric oxide, and the addition amount of the iron oxide is 0.015-0.065% of the total amount of the raw material components; and the invention also discloses a preparation method. According to the polycarboxylate superplasticizer, the production condition is simple and easy to implement, industrial production is easy to realize, the cement dispersing performance and slump retaining performance of the product are excellent, the compressive strength of hardened concrete doped with the product in all ages is good, and the polycarboxylate superplasticizer is suitable for mortar and concrete preparation.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a polycarboxylate water reducer based on a 6C polyether macromonomer and a preparation method thereof. Background technique [0002] The development of modern concrete admixture technology is the key to the development of modern concrete technology and plays a decisive role in the development of concrete technology. Therefore, the innovation and development of concrete admixture technology has always been the focus and focus of the development of the concrete admixture industry. [0003] Concrete admixture is an essential component in modern concrete except cement, sand, stone, water, and admixtures, especially the third-generation polycarboxylate high-performance admixture, accounting for the total usage of concrete admixture It is one of the important technical ways to reduce the amount of cement, improve the utilization rate of industrial waste residue, and realize...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/56C08F228/02C08F4/40C04B24/26C04B103/30
CPCC08F283/065C08F4/40C04B24/2694C04B2103/302C08F220/06C08F220/56C08F228/02
Inventor 黄凤翔袁波杨俊刘才林张恒通任先艳杨海君
Owner 四川鸿鹏新材料有限公司
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