Preparation method of viscosity-reducing mud-resistant polycarboxylate superplasticizer

A polycarboxylic acid and anti-mud technology, which is applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of poor anti-mud performance of high-strength concrete, not obvious effect of reducing viscosity, and low sensitivity of dosage And other problems, to achieve good adaptability, good viscosity reduction effect, high reactivity effect

Active Publication Date: 2021-04-06
ZHEJIANG KZJ NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems in the prior art that the polycarboxylate admixture has poor mud resistance, high selectivity and insignificant viscosity-reducing effect on high-strength concrete configured with machine-made sand, the purpose of the present invention is to provide a viscosity-reducing and mud-resistance polycarboxylate A method for preparing an acid water reducer. The polycarboxylate water reducer prepared by this method has the advantages of good adaptability, excellent mud resistance, significant viscosity reduction function, and low dosage sensitivity.

Method used

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  • Preparation method of viscosity-reducing mud-resistant polycarboxylate superplasticizer
  • Preparation method of viscosity-reducing mud-resistant polycarboxylate superplasticizer
  • Preparation method of viscosity-reducing mud-resistant polycarboxylate superplasticizer

Examples

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Embodiment 1

[0044] (1) Preparation of methallyl polyoxyethylene ether phosphate monomer (PP)

[0045] In parts by mass, add 100 parts of methallyl polyoxyethylene ether (HPEG, molecular weight 1200) and 10 parts of pyrophosphoric acid into a three-necked flask, pass nitrogen gas to remove water and oxygen, and react at 90°C for 10 hours. After completion, add 30 parts of deionized water to obtain methallyl polyoxyethylene ether phosphate monomer (PP).

[0046] (2) Preparation of nonylphenol polyoxyethylene ether methacrylate monomer (WP)

[0047] In parts by mass, add 100 parts of nonylphenol polyoxyethylene ether (APEO, molecular weight 600), 20 parts of methacrylic acid, 0.5-5.0 parts of p-toluenesulfonic acid and 0.3-3.0 parts of hydroquinone into the reaction flask , feed nitrogen to remove water and oxygen, heat to 110°C, react at this temperature for 5h, after the reaction, add 30 parts of deionized water to obtain nonylphenol polyoxyethylene ether methacrylate monomer (WP).

[00...

Embodiment 2

[0053] Functionalized monomer methallyl polyoxyethylene ether phosphate monomer (PP), nonylphenol polyoxyethylene ether methacrylate monomer (WP) and polyethylene glycol monomethyl ether methacrylate ( MP) is prepared respectively with embodiment 1 (1), (2) and (3).

[0054] (4) Preparation of viscosity-reducing and anti-mud type polycarboxylate superplasticizer

[0055] In parts by mass, 80 parts of methallyl polyoxyethylene ether phosphate monomer (PP), 40 parts of nonylphenol polyoxyethylene ether methacrylate monomer (WP), 40 parts of polyethylene glycol Monomethyl ether methacrylate (MP), 5 parts of acrylic acid and 100 parts of water were mixed and stirred to dissolve, and 4.0 parts of hydrogen peroxide was added, and the reaction was carried out at 25°C. Add dropwise the first mixed solution obtained by mixing 30 parts of acrylic acid and 50 parts of deionized water, and complete the dropwise addition within 2.5 hours; The second mixed solution obtained was added drop...

Embodiment 3

[0057] Functionalized monomer methallyl polyoxyethylene ether phosphate monomer (PP), nonylphenol polyoxyethylene ether methacrylate monomer (WP) and polyethylene glycol monomethyl ether methacrylate ( MP) is prepared respectively with embodiment 1 (1), (2) and (3).

[0058] (4) Preparation of viscosity-reducing and anti-mud type polycarboxylate superplasticizer

[0059] In parts by mass, 80 parts of methallyl polyoxyethylene ether phosphate monomer (PP), 60 parts of nonylphenol polyoxyethylene ether methacrylate monomer (WP), 60 parts of polyethylene glycol Monomethyl ether methacrylate (MP), 10 parts of acrylic acid and 100 parts of water were mixed and stirred to dissolve, and 5.0 parts of hydrogen peroxide was added, and the reaction was carried out at 25°C. Add dropwise the first mixed solution obtained by mixing 30 parts of acrylic acid and 50 parts of deionized water, and complete the dropwise addition within 2.5 hours; The second mixed solution obtained was added dro...

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Abstract

The invention discloses a preparation method of a viscosity-reducing mud-resistant polycarboxylate superplasticizer. The preparation method comprises the following steps: esterifying and grafting a rigid structure end group functional monomer with strong hydrophobicity, and copolymerizing 3-hydroxypropyl vinyl polyoxyethylene ether, unsaturated acid and other small monomers to obtain the polycarboxylate superplasticizer. Under the synergistic effect of various groups, the polycarboxylate superplasticizer prepared by the preparation method has the effects of remarkable viscosity reduction function, excellent mud resistance and low doping amount sensitivity.

Description

technical field [0001] The invention belongs to the technical field of building material admixtures, in particular to a preparation method of a viscosity-reducing and mud-resistant polycarboxylate water reducer. Background technique [0002] In recent years, with the progress of China's urbanization and the continuous development of the construction industry, two major problems have emerged in the construction industry: First, various types of machine-made sand have become the main fine aggregate in concrete, and the mud of different components in machine-made sand The selectivity, adaptability and construction performance of the admixture have brought new challenges; the second is the emergence of a large number of high-strength concrete above C50. These concretes have good fluidity, high strength and excellent durability. It has been widely used in bridge engineering and high-rise buildings. These high-strength concretes use a large amount of cementitious materials and a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F2/10C04B24/26C04B103/30
CPCC08F283/065C04B24/246C04B2103/302C08F220/06C08F2/10Y02W30/91
Inventor 曾贤华朱巧勇黄文耀张乐熊浩男徐逸丹凤于飞宇
Owner ZHEJIANG KZJ NEW MATERIALS CO LTD
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