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Polycarboxylate superplasticizer with high water retention and preparation method thereof

A technology of water polycarboxylate and water reducer, which is applied in the field of high water retention polycarboxylate water reducer and its preparation, to achieve the effects of improving workability, reducing the amount of use, and small polymerization steric hindrance

Inactive Publication Date: 2016-06-15
厦门路桥翔通建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a high water retention polycarboxylate superplasticizer that solves the problem of bleeding and segregation of concrete by introducing organic silicon

Method used

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  • Polycarboxylate superplasticizer with high water retention and preparation method thereof
  • Polycarboxylate superplasticizer with high water retention and preparation method thereof
  • Polycarboxylate superplasticizer with high water retention and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: High water retention polycarboxylate superplasticizer

[0023] 100 parts of TPEG and 132.8 parts of deionized water were added to the reactor. Under constant stirring, add 0.8 parts of ammonium persulfate at one time. Then, 8.8 parts of acrylic acid, 2 parts of methacrylic acid, 12.5 parts of MPEG-MA, 0.4 parts of thioglycolic acid, 0.3 parts of aseptic acid, 0.8 parts of γ-methacryloxypropyltrimethoxysilane and 33.2 parts were added dropwise. Parts of mixed solution of deionized water, control the drop in 1 to 4 hours. After dropping, stir at room temperature for 1 hour. Finally, add liquid caustic soda into the reaction kettle and adjust the final pH to 5.5-6 to obtain a new type of high water retention polycarboxylate superplasticizer, and record the sample as PC-1.

Embodiment 2

[0024] Embodiment 2: High water retention polycarboxylate superplasticizer

[0025] 100 parts of TPEG and 130.4 parts of deionized water were added to the reactor. Under constant stirring, add 0.8 parts of ammonium persulfate at one time. Then, 8.8 parts of acrylic acid, 2 parts of methacrylic acid, 12.5 parts of MPEG-MA, 0.4 parts of thioglycolic acid, 0.3 parts of aseptic acid, 1.4 parts of γ-methacryloxypropyltrimethoxysilane and 32.6 parts were added dropwise. Parts of deionized water mixed solution, control dripping in 1 to 4 hours. After dropping, stir at room temperature for 1 hour. Finally, add liquid caustic soda into the reaction kettle and adjust the final pH to 5.5-6 to obtain a new type of high water retention polycarboxylate superplasticizer, and record the sample as PC-2.

Embodiment 3

[0026] Embodiment 3: High water retention polycarboxylate superplasticizer

[0027] 100 parts of TPEG and 131.2 parts of deionized water were added to the reactor. Under constant stirring, 0.7 parts of ammonium persulfate was added in one go. Then, 8.8 parts of acrylic acid, 1.3 parts of methacrylic acid, 8.3 parts of MPEG-MA, 0.3 parts of thioglycolic acid, 0.2 parts of aseptic acid, 1 part of γ-methacryloxypropyl trimethoxysilane and 32.8 parts were added dropwise. The mixed solution of deionized water is controlled to drop in 1 to 4 hours. After dropping, stir at room temperature for 1 hour. Finally, add liquid caustic soda into the reaction kettle and adjust the final pH to 5.5-6 to obtain a new type of high water retention polycarboxylate superplasticizer, and record the sample as PC-3.

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Abstract

The invention discloses a polycarboxylate superplasticizer with high water retention and a preparation method thereof. The polycarboxylate superplasticizer with high water retention is prepared from, by weight, 100 parts of TPEG, 8.3-12.5 parts of MPEG-MA, 10.1-11.2 parts of unsaturated carboxylic acid, 0.8-1.4 parts of organosilicone monomer, 0.7-1.1 parts of an oxidizing agent, 0.2-0.3 part of a reducing agent, 0.3-0.4 part of a chain transfer agent, 163-172 parts of deionized water and liquid alkali for making pH to 5.5-6. The polycarboxylate superplasticizer with high water retention has high slump under the condition of low dosage, workability of concrete can be improved, and water-retention and tackifying effects are achieved. Meanwhile, reaction condition is suitable, the reaction is normal-temperature reaction without heat source, and the technology is concise, environmentally friendly and highly efficient and is suitable for a large-scale industrial production method.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures in building materials, in particular to a high water retention polycarboxylate water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer has attracted more and more attention from personnel in the industry due to its excellent performance and environmental protection characteristics. At present, the domestic market mainly has two kinds of water reducers: ether polycarboxylate water reducer and ester polycarboxylate water reducer. Among them, the ether polycarboxylate superplasticizer has simple process, low content in concrete, good fluidity, but poor adaptability and sensitivity; ester polycarboxylate superplasticizer has good adaptability, strong water retention and anti-segregation ability, However, the dosage is high, the process is cumbersome, and the energy consumption is large. In practical applications, the compounding of e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/06C08F220/06C08F230/08C04B24/42C04B103/30
CPCC04B24/42C04B2103/302C08F283/065C08F220/06C08F230/08
Inventor 黄永毅杨顺荣朱鹏程肖尾俭李芳康净鑫廖毅坚
Owner 厦门路桥翔通建材科技有限公司
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