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Heat-source-free slow-release polycarboxylic acid high-performance water reducing agent and preparation method thereof

A slow-release polycarboxylate and high-performance technology, which is applied in the field of synthesis and preparation of polycarboxylate-based water-reducers for concrete, can solve the problems of rapid loss of concrete slump, achieve high water-reducing rate and product transformation High efficiency, good slump performance

Inactive Publication Date: 2019-01-25
四川恒泽建材有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art, to provide a simple production process, low cost, high initial water-reducing rate, obvious slow-release effect, capable of keeping concrete without loss within 1 to 3 hours, and effectively solving the problem of concrete collapse. The problem of excessive sag loss, energy-saving non-pyrogenic slow-release polycarboxylate high-performance water reducer and its preparation method

Method used

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  • Heat-source-free slow-release polycarboxylic acid high-performance water reducing agent and preparation method thereof
  • Heat-source-free slow-release polycarboxylic acid high-performance water reducing agent and preparation method thereof

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preparation example Construction

[0022] The preparation method of the non-pyrogenic slow-release polycarboxylate high-performance water reducer comprises the following steps:

[0023] S1. Add an appropriate amount of demineralized water to the container, then slowly add prenyl polyoxyethylene ether, and stir at room temperature for 20-30 minutes to fully dissolve the isopentenyl polyoxyethylene ether;

[0024] S2. Add sodium hypophosphite and hydrogen peroxide to the solution in step S1, and stir at room temperature for 5-10 minutes;

[0025] S3. Add acrylic acid, hydroxyethyl acrylate, hydroxypropyl acrylate, 2-acrylamido-2-methylpropanesulfonic acid, and sodium methacrylsulfonate into vessel I filled with demineralized water, and stir Evenly, to obtain solution A; add ammonium persulfate to container II filled with demineralized water, and stir evenly, to obtain solution B;

[0026] S4, in the solution of step S2, add solution A and solution B dropwise simultaneously, control solution A dropwise in 2.5h, c...

Embodiment 1

[0029] The preparation method of non-pyrogenic slow-release polycarboxylate high-performance water reducer, it comprises the following steps:

[0030] (1) Add 80 parts of demineralized water into the container, then slowly add 100 parts of prenyl polyoxyethylene ether, and stir at room temperature for 20-30 minutes to fully dissolve the isopentenyl polyoxyethylene ether.

[0031] (2) Add 0.7 parts of sodium hypophosphite and 1.5 parts of hydrogen peroxide to the solution obtained in step (1), and stir at room temperature for 5 to 10 minutes;

[0032] (3) Add 7.8 parts of acrylic acid, 12.5 parts of hydroxyethyl acrylate, 5.4 parts of hydroxypropyl acrylate, 1 part of 2-acrylamido-2-methylpropanesulfonic acid, and 1.5 parts of sodium methacrylate 30 parts of demineralized water were stirred evenly to obtain solution A; 0.7 parts of ammonium persulfate was added to 40 parts of demineralized water and stirred evenly to obtain solution B;

[0033] (4) In the solution of step S2, ...

Embodiment 2

[0036] The preparation method of non-pyrogenic slow-release polycarboxylate high-performance water reducer, it comprises the following steps:

[0037] S1. Add 80 parts of demineralized water into the container, then slowly add 100 parts of prenyl polyoxyethylene ether, and stir at room temperature for 20-30 minutes to fully dissolve the isopentenyl polyoxyethylene ether.

[0038] S2. Add 0.6 parts of sodium hypophosphite and 1.3 parts of hydrogen peroxide to the solution in step S1, and stir at room temperature for 5-10 minutes;

[0039] S3. Add 6.7 parts of acrylic acid, 13 parts of hydroxyethyl acrylate, 6.7 parts of hydroxypropyl acrylate, 1.7 parts of 2-acrylamido-2-methylpropanesulfonic acid, and 1.6 parts of sodium methacrylic sulfonate for 30 1 part of demineralized water, stirred evenly to obtain solution A; 0.8 part of ammonium persulfate was added to 40 parts of demineralized water, stirred uniformly to obtain solution B;

[0040] S4, in the solution of step S2, dro...

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Abstract

The invention discloses a heat-source-free slow-release polycarboxylic acid high-performance water reducing agent, which comprises: 100 parts of isopentenyl polyoxyethylene ether, 6-10 parts of acrylic acid, 9-13 parts of hydroxyethyl acrylate, 5-9 parts of hydroxypropyl acrylate, 1-2 parts of 2-acrylamide-2-methyl propanesulfonic acid, 1-2 parts of sodium methylallyl sulfonate, 0.5-1.5 parts of sodium phosphite, 0.5-1 part of ammonium persulfate, 1-2 parts hydrogen peroxide, and 140-180 parts of water. The invention further discloses a preparation method of the heat-source-free slow-release polycarboxylic acid high-performance water reducing agent. According to the present invention, the preparation method has characteristics of simple production process and low cost, the obtained producthas advantages of high initial water reduction rate and significant sustained release effect, can maintain concrete at a loss-free state for 1-3 h, can effectively solve the problem of rapid slump loss of concrete, and can save the energy consumption.

Description

technical field [0001] The invention relates to the field of synthesis and preparation of polycarboxylate-based water reducers for concrete, in particular to a non-pyrogenic slow-release polycarboxylate high-performance water reducer and a preparation method thereof. Background technique [0002] At this stage, with the development of the construction industry, the requirements for concrete quality are getting higher and higher. However, due to the large differences in concrete raw materials, the slump loss of freshly mixed concrete has always been a problem that plagues engineering construction in ready-mixed concrete operations. In the process of concrete transportation and construction, the phenomenon of excessive loss of concrete slump often occurs, especially the long-term transportation will lead to excessive loss of concrete slump, which will affect the workability of concrete. Sometimes the addition of water to reshape will make the strength and impermeability of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/20C08F220/58C08F228/02C08F4/40C04B24/16C04B103/40
CPCC04B24/165C04B2103/40C08F4/40C08F283/065C08F220/20C08F228/02
Inventor 贺晓红贾维龙袁慧莉滕文生吴天淳王虎生王卯生
Owner 四川恒泽建材有限公司
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