High-water-reducing high-adaptability polycarboxylate superplasticizer and preparation method thereof

An adaptable, polycarboxylate technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., can solve problems affecting construction, large loss of fluidity over time, and large difference in cement performance

Active Publication Date: 2020-10-23
湖南加美乐素新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different mixtures in the cement, the performance of the cement is quite different, and sometimes even mixed with the mixture that does not meet the requirements, making it difficult to control the adaptability of the cement
[0004] In addition, with the increasing application of polycarboxylate high-performance water reducing agent, concrete raw

Method used

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  • High-water-reducing high-adaptability polycarboxylate superplasticizer and preparation method thereof
  • High-water-reducing high-adaptability polycarboxylate superplasticizer and preparation method thereof
  • High-water-reducing high-adaptability polycarboxylate superplasticizer and preparation method thereof

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Experimental program
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Embodiment 1

[0032] This embodiment includes the following steps;

[0033] (1) Add 200 parts of bottom water (parts by weight, the same below) into the reactor, and add 360 parts of APEG at room temperature to dissolve;

[0034] (2) After the APEG is dissolved, add 17 parts of hydrogen peroxide and 3 parts of ammonium persulfate, and raise the temperature of the reactor to 50°C;

[0035] (3) Keep the temperature of the reactor at 50°C, slowly add a mixed solution of 3 parts of mercaptoacetic acid, 3 parts of mercaptopropionic acid and 3 parts of ascorbic acid dissolved in 50 parts of deionized water dropwise, and control the rate of dropping, and the drop will be completed within 3-3.5 hours ;

[0036] (4) Slowly add a mixed solution of 30 parts of acrylic acid, 5 parts of sodium methallyl sulfonate, 22 parts of maleic anhydride dissolved in 100 parts of deionized water, control the rate of dropping, and finish dropping in 2.5-3 hours;

[0037] (5) Add dropwise a mixed solution of 3 part...

Embodiment 2

[0040] This embodiment includes the following steps:

[0041] (1) Add 200 parts of bottom water (parts by weight, the same below) into the reactor, and add 360 parts of APEG at room temperature to dissolve;

[0042] (2) After the APEG is dissolved, add 16 parts of hydrogen peroxide and 4 parts of ammonium persulfate, and raise the temperature of the reactor to 60°C;

[0043] (3) Keep the temperature of the reactor at 60°C, slowly add a mixed solution of 3 parts of mercaptoacetic acid, 3 parts of mercaptopropionic acid and 4 parts of ascorbic acid dissolved in 50 parts of deionized water, and control the rate of addition, and the dripping will be completed within 3-3.5 hours ;

[0044] (4) Slowly add a mixed solution of 32 parts of acrylic acid, 4 parts of sodium methallyl sulfonate, 20 parts of maleic anhydride dissolved in 100 parts of deionized water, control the rate of dropping, and finish dropping in 2.5-3 hours;

[0045] (5) Slowly add a mixed solution of 3 parts of fe...

Embodiment 3

[0048] This embodiment includes the following steps:

[0049] (1) Add 180 parts of bottom water (parts by weight, the same below) into the reactor, and add 350 parts of APEG at room temperature to dissolve;

[0050] (2) Add 18 parts of hydrogen peroxide and 3 parts of ammonium persulfate to the bottom water after dissolution, and raise the temperature of the reactor to 50°C;

[0051](3) Keep the temperature of the reactor at 50°C, slowly add 4 parts of mercaptoacetic acid, 4 parts of mercaptopropionic acid and 3 parts of ascorbic acid in 50 parts of deionized water dropwise, and control the rate of addition, and the drop will be completed within 3-3.5 hours ;

[0052] (4) Slowly add a mixed solution of 34 parts of acrylic acid, 6 parts of sodium methallyl sulfonate, 23 parts of maleic anhydride dissolved in 120 parts of deionized water, control the rate of dropping, and finish dropping in 2.5-3 hours;

[0053] (5) Slowly add a mixed solution of 4 parts of ferric sulfate, 3 p...

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Abstract

The invention discloses a high-water-reducing high-adaptability polycarboxylate superplasticizer and a preparation method thereof. The polycarboxylate superplasticizer is prepared by polymerizing fivemonomers including allyl polyether, acrylic acid, maleic anhydride, vinyltriethoxysilane and sodium methylallyl sulfonate, and introducing an adaptive accelerant at the same time. The polycarboxylatesuperplasticizer provided by the invention has excellent adaptability to mixtures and gravels in various kinds of cement, and also has a relatively high water reducing rate. The preparation method issimple to operate, mild in condition and beneficial to large-scale production.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, and in particular relates to a high-water-reducing and high-adaptability polycarboxylate water-reducer and a preparation method thereof. Background technique [0002] Water reducer is the most widely used admixture in cement-based materials. It can improve fluidity and workability without changing the components of cement-based materials, making it easier to mix; reduce mixing water consumption, Improves strength and durability. Polycarboxylate high-performance water reducer is a general term for a series of polymers with specific molecular structure and performance. It has many unique advantages such as low dosage, high water reducing rate, and less impact on concrete drying shrinkage. Through the design and optimization of the molecular structure, high-performance polycarboxylate superplasticizers can be synthesized. [0003] At present, there are different types, brands and models of dome...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F230/08C08F222/06C08F228/02C08F2/38C08F4/40C04B24/16C04B103/30
CPCC08F283/065C08F2/38C08F4/40C04B24/165C04B2103/302C08F220/06C08F230/085C08F222/06C08F228/02Y02W30/91
Inventor 王伟周婷婷
Owner 湖南加美乐素新材料股份有限公司
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