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Viscosity-reduction type polycarboxylate water reducer and preparation method thereof

A viscous polycarboxylic acid and water-reducing agent technology, applied in the field of building materials, can solve the problems of long time consumption, influence of copolymerization, complicated preparation steps of water-reducing agent, etc. Viscous effect

Active Publication Date: 2016-09-07
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation steps of this type of water reducer are complicated. The preparation of unsaturated macromonomers containing tertiary amino groups requires the use of solvent media, acid catalysts and polymerization inhibitors. The late copolymerization reaction has a certain influence

Method used

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  • Viscosity-reduction type polycarboxylate water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of Class A polycarboxylate water reducer:

[0029] Components: 48 parts of TPEG with a molecular weight of 600, 7.2 parts of acrylic acid, 1 part of sodium methacrylate, 0.3 part of mercaptopropionic acid, 0.48 parts of ammonium persulfate, 0.8 parts of sodium bisulfite, and 80 parts of deionized water.

[0030] The deionized water is 30 parts of deionized water X, 30 parts of deionized water Y, and 20 parts of deionized water Z.

[0031] The process steps are as follows:

[0032] ① Pour TPEG with a molecular weight of 600 and deionized water X into a 500ml three-necked flask according to the above mass ratio, stir in a water bath and heat to 42°C, then add 0.8 parts of reducing agent to the three-necked flask; Dissolve ammonium persulfate and mercaptopropionic acid in deionized water Y to prepare solution C; in another container, dissolve acrylic acid and sodium methacrylate in deionized water Z to prepare solution D

[0033] ② After all the solids in...

Embodiment 2

[0042] (1) Preparation of Class A polycarboxylate water reducer:

[0043] Components: 50 parts of TPEG with a molecular weight of 800, 7.5 parts of acrylic acid, 1.5 parts of sodium methacrylate, 0.35 parts of mercaptopropionic acid, 0.45 parts of sodium persulfate, 0.8 parts of sodium bisulfite, and 80 parts of deionized water.

[0044] The deionized water is 35 parts of deionized water X, 25 parts of deionized water Y, and 20 parts of deionized water Z.

[0045] The process steps are as follows:

[0046] ①Pour 50 parts of TPEG with a molecular weight of 800 and deionized water X into a 500ml three-necked flask according to the above mass ratio, stir in a water bath and heat to 45°C, then add 0.8 parts of reducing agent into the three-necked flask; in the container (beaker) Dissolve ammonium persulfate and mercaptopropionic acid in deionized water Y to prepare solution C; in another container (another beaker), dissolve acrylic acid and sodium methacrylate sulfonate in deioni...

Embodiment 3

[0055] (1) Preparation of Class A polycarboxylate water reducer:

[0056] Components: 55 parts of TPEG with a molecular weight of 1000, 7.8 parts of acrylic acid, 2.0 parts of sodium methacrylate, 0.5 parts of mercaptoethanol, 0.55 parts of sodium persulfate, 0.85 parts of sodium bisulfite, and 90 parts of deionized water.

[0057] The deionized water comprises 45 parts of deionized water X, 25 parts of deionized water Y, and 20 parts of deionized water Z.

[0058] The process steps are as follows:

[0059] ①Pour 55 parts of TPEG with a molecular weight of 1000 and deionized water X into a 500ml three-necked flask according to the above mass ratio, stir in a water bath and heat to 48°C, then add 0.85 parts of reducing agent into the three-necked flask; Dissolve ammonium persulfate and mercaptopropionic acid in deionized water Y to prepare solution C; in another container (another beaker), dissolve acrylic acid and sodium methacrylate in deionized water Z to prepare Solution ...

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Abstract

The invention discloses a viscosity-reduction type polycarboxylate water reducer and a preparation method thereof, and relates to the technical field of building materials. An A type water reducer and a B type water reducer are synthesized according to theoretical design, and the water reducer is formed by compounding the two water reducers, so that the water reducer is the viscosity-reduction type polycarboxylate water reducer which is small in mixing amount, obvious in viscosity-reduction effect, high in water-reducing rate and little in slump loss.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a viscosity-reducing polycarboxylate water reducer and a preparation method thereof. Background technique [0002] In recent years, with the continuous development of my country's construction industry, high-grade concrete is being widely used for its unique advantages of high strength, good integrity, and low self-weight, especially in large-scale projects such as bridge engineering. At the same time, it has obvious benefits in terms of energy saving, environmental protection, sustainable development, safe service life of the project, and adaptability to environmental conditions. Therefore, high-grade concrete has become an inevitable trend in the development of contemporary concrete technology. However, due to the lower water-binder ratio and the increase in the mixing ratio of some mineral admixtures, high-grade concrete has problems of high viscosity and slow flow ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F228/02C08F220/14C08F220/18C08F2/38C04B24/16C04B103/30
CPCC04B24/165C08F2/38C08F283/065C04B2103/302C08F220/1803C08F220/1802C08F220/1804
Inventor 叶子刘昭洋吴伟汪咏梅王龙飞刘旭飞董树强
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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