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Hydrolysis-regulated slow-release mud-resistant polycarboxylate superplasticizer and preparation method thereof

A technology of anti-mud type and polycarboxylate, which is applied in the field of polycarboxylate superplasticizers, can solve the problems of high soil sensitivity and poor slump performance, so as to improve soil tolerance, slump performance, and anti-slump performance. The effect of compressive strength

Pending Publication Date: 2022-03-22
中建西部建设新材料科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a hydrolysis-controlled slow-release anti-mud type polycarboxylate superplasticizer and its preparation method, which can effectively solve the problem of slump retention in existing superplasticizers. Problems of poor performance and high soil sensitivity

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  • Hydrolysis-regulated slow-release mud-resistant polycarboxylate superplasticizer and preparation method thereof
  • Hydrolysis-regulated slow-release mud-resistant polycarboxylate superplasticizer and preparation method thereof
  • Hydrolysis-regulated slow-release mud-resistant polycarboxylate superplasticizer and preparation method thereof

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Effect test

Embodiment 1

[0025] A hydrolysis-controlled slow-release mud-resistant polycarboxylate superplasticizer, the preparation method of which is as follows:

[0026] (1) In a glass reactor equipped with a thermometer and a stirrer, add 300 parts of prenol polyoxyethylene ether and 400 parts of deionized water in sequence, stir until the prenol polyoxyethylene ether is fully dissolved, then add 5 part of ammonium persulfate to obtain the reactant bottom solution;

[0027] (2) Mix 0.45 parts of sodium methylthiosulfate with 1.4 parts of thioglycolic acid and 60 parts of deionized water to make mixed solution 1; mix 10 parts of acrylic acid, 20 parts of hydroxyethyl acrylate, 10 parts of 2-hydroxyethyl Add 30 parts of deionized water after mixing methacrylate phosphate and 15 parts of methacryloyloxyethyl-ethyl-dimethylammonium bromide to make mixed solution 2;

[0028] (3) In the state of stirring, heat the bottom solution of the reactant in a water bath to raise the temperature to 20°C, first a...

Embodiment 2

[0030] A hydrolysis-controlled slow-release mud-resistant polycarboxylate superplasticizer, the preparation method of which is as follows:

[0031] (1) In a glass reactor equipped with a thermometer and a stirrer, add 300 parts of methallyl alcohol polyoxyethylene ether and 400 parts of deionized water in sequence, and stir until the methallyl alcohol polyoxyethylene ether is fully dissolved Add 2 parts of hydrogen peroxide to obtain the reactant bottom solution;

[0032] (2) Mix 1.8 parts of L-ascorbic acid with 2 parts of mercaptoethanol and 60 parts of deionized water to make mixed solution 1; mix 6 parts of acrylic acid, 8 parts of methacrylic acid, 15 parts of 2-hydroxyethyl methacrylate, Mix 10 parts of dimethylaminoethyl methacrylate and 12 parts of acryloyloxyethyltrimethylammonium chloride and add 30 parts of deionized water to make mixed solution 2;

[0033] (3) In the state of stirring, heat the reactant base solution in a water bath to raise the temperature to 50°...

Embodiment 3

[0035] A hydrolysis-controlled slow-release mud-resistant polycarboxylate superplasticizer, the preparation method of which is as follows:

[0036] (1) In a glass reactor equipped with a thermometer and a stirrer, add 300 parts of 4-hydroxybutyl vinyl polyoxyethylene ether and 400 parts of deionized water in sequence, and stir until 4-hydroxybutyl vinyl polyoxyethylene After the ether is fully dissolved, add 1 part of potassium persulfate to obtain the bottom solution of the reactant;

[0037](2) Mix 0.8 parts of L-ascorbic acid, 0.5 parts of erythorbic acid, 1.5 parts of mercaptopropionic acid, 1.8 parts of thioglycolic acid and 60 parts of deionized water to make mixed solution 1; mix 10 parts of methacrylic acid, 10 parts of Acid anhydride, 10 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5 parts of hydroxypropyl acrylate, 17 parts of methacryloyloxyethyl-butyl-dimethylammonium bromide are mixed and then added to 30 parts of deionized Water, made mixed solution two; ...

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Abstract

The invention discloses a hydrolysis-regulated slow-release mud-resistant polycarboxylic acid water reducing agent and a preparation method thereof. The water reducing agent comprises the following components in parts by weight: 300 parts of unsaturated polyether macromonomer, 10-25 parts of unsaturated acid monomer, 15-35 parts of unsaturated ester / amide monomer and 10-30 parts of functional monomer, the functional monomer is a quaternary ammonium salt amide monomer. The water reducing agent can effectively solve the problems of poor slump retaining performance and high soil sensitivity of the existing water reducing agent.

Description

technical field [0001] The invention relates to the technical field of polycarboxylate superplasticizers, in particular to a hydrolysis-controlled slow-release mud-resistant polycarboxylate superplasticizer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer, as the third generation of high-performance concrete superplasticizer after lignin superplasticizer and naphthalene superplasticizer, has become a high-strength and An important part of high fluidity concrete, it has been widely used in urban construction, transportation, water conservancy, electrical, municipal and other related engineering construction. However, in a large number of theoretical studies and engineering applications, it is found that there are compatibility problems between polycarboxylate superplasticizers and concrete constituent materials. On the one hand, with the rapid development of the construction industry, the number of engineering buildings continu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/20C08F230/02C08F220/34C08F222/06C08F220/58C08F220/28C08F220/54C08F228/02C04B24/26C04B103/30
CPCC08F283/065C04B24/2694C04B24/246C04B24/165C04B2103/302C08F220/06C08F220/20C08F230/02C08F220/34C08F222/06C08F220/585C08F220/283C08F220/54C08F228/02C08F220/286
Inventor 王军单海林汪金文陈景毕耀刘其彬杨季雨严圣东周继前
Owner 中建西部建设新材料科技有限公司
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