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Polycarboxylate superplasticizer with effects of mud resistance and viscosity reduction and preparation method thereof

A technology of polycarboxylic acid and water reducing agent, applied in the field of concrete admixtures, can solve the problems of high viscosity of concrete and reduced concrete strength, and achieve the effects of excellent viscosity reduction performance, reduced adsorption and good dispersibility

Inactive Publication Date: 2019-12-13
科之杰新材料集团河南有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of ensuring the dispersibility of polycarboxylate-based water-reducers, the reduction of concrete strength and the high viscosity of concrete at the same time in the above-mentioned background technology, the present invention provides a polycarboxylate-based water-reducer with both mud resistance and viscosity reduction, including the following Raw material components: polyether macromonomer, unsaturated carboxylic acid, functional monomer, initiator, chain transfer agent;

Method used

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  • Polycarboxylate superplasticizer with effects of mud resistance and viscosity reduction and preparation method thereof
  • Polycarboxylate superplasticizer with effects of mud resistance and viscosity reduction and preparation method thereof
  • Polycarboxylate superplasticizer with effects of mud resistance and viscosity reduction and preparation method thereof

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Effect test

Embodiment 1

[0023] Select the following components in advance: 200g macromonomer isopentenyl polyoxyethylene ether, chain transfer agent thioglycolic acid 0.9g, acrylic acid 16g, hydroxyethyl methacrylate phosphate 3.0g, dibasic ester 4.2g, initiator Sodium formaldehyde sulfoxylate 0.24g, hydrogen peroxide 0.90g.

[0024] The preparation process is as follows:

[0025] (1) The polyether macromonomer isopentenyl polyoxyethylene ether is dissolved in water to obtain aqueous solution A, the chain transfer agent mercaptoacetic acid is dissolved in water to prepare aqueous solution B, and the remaining unsaturated carboxylic acid acrylic acid and functional monomer are dissolved in water to obtain Aqueous solution C; Initiator hang white block is dissolved in water to prepare aqueous solution D;

[0026] Wherein, the functional monomer is: hydroxyethyl methacrylate phosphate.

[0027] (2) Add aqueous solution A to a four-necked flask equipped with a stirrer, a thermometer, and a dropping dev...

Embodiment 2

[0030] The following components are pre-selected: macromonomer methallyl alcohol polyoxyethylene ether 200g, chain transfer agent mercaptopropionic acid 1.36g, unsaturated carboxylic acid acrylic acid 18g, hydroxyethyl methacrylate sulfonate 2.2g, modified Allyl polyethylene glycol 4.8g, initiator ascorbic acid 0.75g, hydrogen peroxide 1.2g.

[0031] The preparation process is as follows:

[0032] (1) Methoxy polyoxyethylene ether is dissolved in water to obtain aqueous solution A, mercaptopropionic acid is dissolved in water to prepare aqueous solution B, acrylic acid and hydroxyethyl methacrylate sulfonate are dissolved in water to obtain aqueous solution C, chain initiator Ascorbic acid is dissolved in water to obtain aqueous solution D;

[0033] Wherein, the functional monomer is: hydroxyethyl methacrylate sulfonate.

[0034] (2) Add aqueous solution A to a four-necked flask equipped with a stirrer, a thermometer, and a dropping device, and add perhydrogen peroxide and p...

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Abstract

The invention relates to the technical field of concrete additives and particularly relates to a polycarboxylate superplasticizer with effects of mud resistance and viscosity reduction and a preparation method thereof. The polycarboxylate superplasticizer is prepared from the following raw material components: polyether macromonomer, unsaturated carboxylic acid, functional monomer, initiator and achain transfer agent, wherein the functional monomer is an olefin polymer compound containing ester functional groups. The polycarboxylate superplasticizer with effects of mud resistance and viscosity reduction can be used for ensuring the water-reducing rate, reducing adsorption of clay on polycarboxylate ions and improving the viscosity of concrete, achieves uniformity of high mud resistance and high water reducing dispersion, and has important practical application value and market prospect.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a polycarboxylate water reducer with mud resistance and viscosity reduction and a preparation method thereof. Background technique [0002] In recent years, due to the rapid development of domestic infrastructure, not only the demand for building concrete is increasing, but also in some special projects, there are new requirements for the performance of concrete, which requires the addition of high-performance concrete There are higher requirements for admixtures, and polycarboxylate superplasticizers are widely used because of their low dosage, high water reducing rate, low concrete shrinkage, and environmental protection. [0003] However, with the rapid development of my country's construction industry and the new form of environmental protection, the existing high-quality sand and gravel resources are gradually exhausted, and the sand and gravel resources in various places ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F230/02C08F220/38C04B24/16C04B24/26C04B103/30
CPCC04B24/165C04B24/246C04B2103/302C08F283/065C08F220/06C08F230/02
Inventor 杜可禄刘尊玉温庆如张秉旺
Owner 科之杰新材料集团河南有限公司
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