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A kind of polycarboxylate high-performance water reducing agent and preparation method thereof

A polycarboxylic acid-based, high-performance technology, applied in the field of building materials, can solve the problems of increased cost and insufficient effect, and achieve the effect of reducing water-cement ratio, significant economic and social benefits, and scientific proportioning

Active Publication Date: 2022-04-26
RIZHAO FEM NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can achieve the goal, but the effect is not significant enough, resulting in increased costs

Method used

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  • A kind of polycarboxylate high-performance water reducing agent and preparation method thereof
  • A kind of polycarboxylate high-performance water reducing agent and preparation method thereof
  • A kind of polycarboxylate high-performance water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A polycarboxylic acid-based high-performance water reducer, which is composed of a first component and a second component with a mass ratio of 1:0.5, and the first component is prepared from the following raw materials in parts by weight: no 100 parts of saturated polyoxyethylene ether, 80 parts of methyl acrylate, 10 parts of acrylic acid, 10 parts of oxidizing agent, 1.5 parts of chain transfer agent, 10 parts of reducing agent, 3 parts of liquid caustic soda and 60 parts of deionized water;

[0028] The second component is prepared from the following raw materials in parts by weight: 5 parts of sodium lignosulfonate, 8 parts of diethanol monoisopropanolamine, and 1 part of starch-based hydrogel.

[0029] The starch-based hydrogel is prepared by the following method: weigh 20.0g cornstarch, and form a starch emulsion with a solid content of 5% in a mixed solvent of deionized water and ethanol at a volume ratio of 5:1, and The starch emulsion was heated to 75°C for 30 ...

Embodiment 2

[0042] A polycarboxylic acid-based high-performance water reducer, which is composed of a first component and a second component with a mass ratio of 1:0.5, and the first component is prepared from the following raw materials in parts by weight: no 150 parts of saturated polyoxyethylene ether, 90 parts of methyl acrylate, 20 parts of acrylic acid, 15 parts of oxidizing agent, 2 parts of chain transfer agent, 15 parts of reducing agent, 4 parts of liquid caustic soda and 75 parts of deionized water;

[0043] The second component is prepared from the following raw materials in parts by weight: 8 parts of sodium lignosulfonate, 9 parts of diethanol monoisopropanolamine, and 3 parts of starch-based hydrogel.

[0044] The starch-based hydrogel is prepared by the following method: weigh 20.0g cornstarch, and form a starch emulsion with a solid content of 8% in a mixed solvent of deionized water and ethanol at a volume ratio of 8:1, and The starch emulsion was heated up to 75°C for 7...

Embodiment 3

[0057] A polycarboxylic acid-based high-performance water reducer, which is composed of a first component and a second component with a mass ratio of 1:0.5, and the first component is prepared from the following raw materials in parts by weight: no 200 parts of saturated polyoxyethylene ether, 100 parts of methyl acrylate, 30 parts of acrylic acid, 20 parts of oxidizing agent, 2.5 parts of chain transfer agent, 20 parts of reducing agent, 5 parts of liquid caustic soda and 90 parts of deionized water;

[0058] The second component is prepared from the following raw materials in parts by weight: 10 parts of sodium lignosulfonate, 10 parts of diethanol monoisopropanolamine, and 5 parts of starch-based hydrogel.

[0059] The starch-based hydrogel is prepared by the following method: weigh 20.0g cornstarch, and form a starch emulsion with a solid content of 10% in a mixed solvent of deionized water and ethanol at a volume ratio of 10:1, and The starch emulsion was heated to 75°C f...

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Abstract

The invention discloses a polycarboxylic acid-based high-performance water reducer and a preparation method thereof, belonging to the technical field of building materials. The water reducer of the present invention is composed of the first component and the second component with a mass ratio of 1:0.5. The first component is composed of unsaturated polyoxyethylene ether, methyl acrylate, acrylic acid, oxidizing agent, chain transfer agent, The reducing agent, liquid caustic soda and deionized water are prepared as raw materials; the second component is prepared from sodium lignosulfonate, diethanol monoisopropanolamine and starch-based hydrogel as raw materials. The invention has a scientific ratio of raw materials, synergistic effect among each other, good compatibility among various components, which can ensure uniform and stable storage for a long time; low shrinkage rate, which can effectively improve the durability of concrete; high water-reducing rate, which can The water-cement ratio is greatly reduced to ensure the strength of concrete; the slump retention effect is good, which satisfies the concrete construction performance; the dosage is low, which has significant economic and social benefits, and is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a polycarboxylic acid-based high-performance water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is the third-generation superplasticizer with excellent comprehensive performance. It has been produced and applied in Japan, Germany, the United States and other developed countries since the late 1980s. It has many advantages such as high water-reducing rate, small loss of concrete slump over time, low dosage, great contribution to concrete strength, and good environmental protection. Station, many domestic application companies began to choose polycarboxylate superplasticizer as the fifth essential component of concrete. However, due to the relatively short application and development time of polycarboxylic acid-based high-performance water-reducers in my country, its application technology research ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C08F283/06C08F220/14C08F220/06C04B103/30
CPCC04B40/0039C08F283/065C04B2103/302C08F220/14C08F220/06C04B24/32C04B24/38C04B24/18C04B24/122
Inventor 肖维录井富磊张成强
Owner RIZHAO FEM NEW MATERIAL TECH
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