Polycarboxylate superplasticizer and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, applied in the field of chemical building materials, can solve the problems of poor rheology, increased viscosity of concrete, difficult construction, etc., and achieves the effect of reducing production cost, short production cycle and good molecular weight

Inactive Publication Date: 2017-09-22
安徽森普新型材料发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When configuring high-performance concrete, in order to improve the compactness, strength and durability of concrete, a better way is to reduce the water-binder ratio, but it will also cause certain problems. A low water-binder ratio will lead to an increase in the viscosity of the concrete. Poor rheology, difficult construction

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take each raw material component by weight as follows:

[0028] 340 parts by weight of methoxy polyethylene glycol, 20 parts by weight of methacrylic acid, 2 parts by weight of hydroxyalkyl acrylate, 2 parts by weight of catalyst, 2 parts by weight of polymerization inhibitor, 2 parts by weight of oxidizing agent, 1 part by weight of reducing agent, 1 part by weight of tartaric acid, 640 parts by weight of water.

[0029] (2) methoxypolyethylene glycol and 10 parts by weight of methacrylic acid are synthesized under the effect of catalyst and polymerization inhibitor;

[0030] (3) Dissolving the above-mentioned methoxypolyethylene glycol methacrylate in 260 parts by weight of water to obtain the first solution; dissolving the remaining methacrylic acid and the hydroxyalkyl acrylate in 40 parts by weight of water to obtain the second solution Two solutions; the reducing agent is dissolved in 40 parts by weight of water to obtain the third solution, and the tartaric ...

Embodiment 2

[0034] (1) Take each raw material component by weight as follows:

[0035] 350 parts by weight of methoxypolyethylene glycol, 25 parts by weight of methacrylic acid, 6 parts by weight of hydroxyalkyl acrylate, 4 parts by weight of catalyst, 4 parts by weight of polymerization inhibitor, 4 parts by weight of oxidizing agent, 3 parts by weight of reducing agent, 3 parts by weight of tartaric acid, 640 parts by weight of water.

[0036] (2) methoxypolyethylene glycol and 15 parts by weight of methacrylic acid are synthesized under the effect of catalyst and polymerization inhibitor;

[0037] (3) Dissolving the above-mentioned methoxypolyethylene glycol methacrylate in 270 parts by weight of water to obtain the first solution; dissolving the remaining methacrylic acid and the hydroxyalkyl acrylate in 50 parts by weight of water to obtain the second solution Two solutions; the reducing agent is dissolved in 50 parts by weight of water to obtain the third solution, and the tartaric...

Embodiment 3

[0041] (1) Take each raw material component by weight as follows:

[0042] 360 parts by weight of methoxy polyethylene glycol, 40 parts by weight of methacrylic acid, 10 parts by weight of hydroxyalkyl acrylate, 6 parts by weight of catalyst, 6 parts by weight of polymerization inhibitor, 6 parts by weight of oxidizing agent, 5 parts by weight of reducing agent, 5 parts by weight of tartaric acid, 640 parts by weight of water.

[0043] (2) methoxy polyethylene glycol and 20 parts by weight of methacrylic acid are synthesized under the effect of catalyzer, polymerization inhibitor with methoxy polyethylene glycol methacrylate;

[0044] (3) Dissolving the above-mentioned methoxy polyethylene glycol methacrylate in 280 parts by weight of water to obtain the first solution; dissolving the remaining methacrylic acid and the hydroxyalkyl acrylate in 60 parts by weight of water to obtain the second solution Two solutions; the reducing agent is dissolved in 60 parts by weight of wate...

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PUM

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Abstract

The invention discloses a polycarboxylate superplasticizer and a preparation method thereof. The polycarboxylate superplasticizer is prepared from raw materials: by weight, 340-360 parts of methoxypolyethylene glycol, 20-40 parts of methacrylic acid, 2-10 parts of hydroxyalkyl acrylic ester, 2-6 parts of catalyst, 2-6 parts of polymerization inhibitor, 2-6 parts of oxidizing agent, 1-5 parts of reducing agent, 1-5 parts of tartaric acid and 640 parts of water. The preparation method of the polycarboxylate superplasticizer is carried out at the temperature ranging from 5 DEG C to 40 DEG C. According to the preparation method, the problem of low efficiency at temperature during use of one type of reducing agent can be avoided, dropwise adding time can be shortened, production cycle can be shortened, energy consumption can be lowered, and production cost can be decreased.

Description

technical field [0001] The invention belongs to the technical field of chemical building materials, and in particular relates to a polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Concrete water reducer is the most widely used concrete admixture, which can significantly improve the performance of concrete and is regarded as the fifth component of concrete. It has gone through three generations so far. The first generation is lignosulfonate ordinary water reducing agent, mainly using papermaking waste liquid cellulose as raw material, and the water reducing rate is lower, less than 10%; the second generation is mainly composed of β-naphthalenesulfonic acid formaldehyde condensate Naphthalene-based high-efficiency water-reducers are representative, and also include melamine-based water-reducers, sulfamic acid-based water-reducers and aliphatic high-efficiency water-reducers. The water-reducing rate can reach more than 20%. Cement ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C08F220/06C08F220/28C08F222/02C04B24/26C04B103/30
CPCC04B24/2605C04B2103/302C08F290/062C08F220/281
Inventor 张家如傅曹辉张思亮
Owner 安徽森普新型材料发展有限公司
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