A kind of preparation method of viscosity-reducing and anti-mud type polycarboxylate water reducer

A polycarboxylic acid, anti-mud technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problem of poor mud resistance, insignificant viscosity reduction effect and low dosage sensitivity of high-strength concrete and other problems, to achieve the effect of good adaptability, good viscosity reduction effect and high reactivity

Active Publication Date: 2022-05-17
ZHEJIANG KZJ NEW MATERIALS CO LTD
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  • 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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  • A kind of preparation method of viscosity-reducing and anti-mud type polycarboxylate water reducer
  • A kind of preparation method of viscosity-reducing and anti-mud type polycarboxylate water reducer
  • A kind of preparation method of viscosity-reducing and anti-mud type polycarboxylate water reducer

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Embodiment 1

[0045] (1) Preparation of methallyl polyoxyethylene ether phosphate monomer (PP)

[0046] 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).

[0047] (2) Preparation of nonylphenol polyoxyethylene ether methacrylate monomer (WP)

[0048] 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

[0054] 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).

[0055] (4) Preparation of viscosity-reducing and anti-mud type polycarboxylate superplasticizer

[0056] 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

[0058] 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).

[0059] (4) Preparation of viscosity-reducing and anti-mud type polycarboxylate superplasticizer

[0060] 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 and anti-mud type polycarboxylate water-reducer, which firstly grafts a highly hydrophobic rigid structure terminal functional monomer through esterification, and then through 3-hydroxypropyl vinyl polyoxygen Vinyl ether, unsaturated acid and other small monomers are copolymerized to obtain the polycarboxylate water reducer. Under the synergistic effect of various groups, the polycarboxylate water reducer prepared by the preparation method of the present invention has the effects of remarkable viscosity-reducing function, excellent mud resistance performance and low dosage 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 Patents(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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