A kind of preparation method of high performance polycarboxylate water reducer

A technology of polycarboxylic acid and water reducing agent, applied in the field of water reducing agent, can solve the problems of low applicability, and achieve the effects of strong applicability, high water reducing rate, and good slump retention performance

Inactive Publication Date: 2017-10-10
深圳中大新材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problems that the existing ether polycarboxylate water reducer has low applicability, and the water reducing rate and slump retention performance need to be further improved, and provides an ether with high water reducing rate, good slump retention performance and strong applicability The preparation method of polycarboxylate water reducer

Method used

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  • A kind of preparation method of high performance polycarboxylate water reducer
  • A kind of preparation method of high performance polycarboxylate water reducer
  • A kind of preparation method of high performance polycarboxylate water reducer

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Put 380 parts (refer to parts by weight, the same below) allyl polyoxyethylene ether (relative molecular weight 2400) and 240 parts of deionized water into the reaction vessel, stir and heat, so that the temperature of the material in the reaction vessel rises to 59 -61°C, while maintaining the temperature at 59-61°C, stir to dissolve the added substances completely.

[0020] Keep the temperature of the material in the reaction vessel at 59-61°C and keep stirring, and put 9 parts of hydrogen peroxide with a concentration of 27% into the reaction vessel at one time; after stirring for 10 minutes, add 60 parts of hydrogen peroxide with a concentration of 80% acrylic acid aqueous solution and 80 parts of adjustment-reduction mixed solution (containing 0.6 parts of vitamin C and 1.2 parts of mercaptopropionic acid), wherein the dripping time of the acrylic acid aqueous solution is 180 minutes, and the dropping time of the adjustment-reduction mixed solution is 210 minutes. ...

Embodiment 2

[0023] Put 380 parts (refer to parts by weight, the same below) allyl polyoxyethylene ether (relative molecular weight 2400) and 220 parts of deionized water into the reaction vessel, stir and heat, so that the temperature of the material in the reaction vessel rises to 59 -61°C, while maintaining the temperature at 59-61°C, stir to dissolve the added substances completely.

[0024] Keep the temperature of the material in the reaction vessel at 59-61°C and keep stirring, and put 9 parts of hydrogen peroxide with a concentration of 27% into the reaction vessel at one time; after stirring for 10 minutes, add 60 parts of hydrogen peroxide with a concentration of 75% acrylic acid aqueous solution and 80 parts of adjustment-reduction mixed solution (containing 0.6 parts of vitamin C and 1.5 parts of mercaptopropionic acid), wherein the dripping time of the acrylic acid aqueous solution is 180 minutes, and the dropping time of the adjustment-reduction mixed solution is 210 minutes. ...

Embodiment 3

[0027] Put 400 parts (refer to parts by weight, the same below) allyl polyoxyethylene ether (relative molecular weight 2400) and 250 parts of deionized water into the reaction vessel, stir and heat, so that the temperature of the material in the reaction vessel rises to 59 -61°C, while maintaining the temperature at 59-61°C, stir to dissolve the added substances completely.

[0028] Keep the temperature of the material in the reaction vessel at 59-61°C and keep stirring, and put 9 parts of hydrogen peroxide with a concentration of 27% into the reaction vessel at one time; after stirring for 10 minutes, add 60 parts of hydrogen peroxide with a concentration of 85% acrylic acid aqueous solution and 80 parts of adjustment-reduction mixed solution (containing 0.6 parts of vitamin C and 1.8 parts of mercaptopropionic acid), wherein the dripping time of the acrylic acid aqueous solution is 180 min, and the dropping time of the adjustment-reduction mixed solution is 210 min.

[0029]...

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Abstract

The invention relates to the technical field of water reducers, in particular to a preparation method of a high-performance polycarboxylate water reducer. In the present invention, allyl polyoxyethylene ether is used as the primer, and when the temperature rises to a specified temperature, a certain amount and concentration of oxidizing agent is added, and after stirring for a certain period of time, a high-concentration acrylic acid aqueous solution and an adjustment-reduction mixed solution are added dropwise at the same time. The procedure is simple, the reaction conditions are easy to control, and the product is cost-effective. By controlling the process conditions, the present invention can produce the ether polycarboxylate water reducer with strong applicability, high water reducing rate and good slump retention performance.

Description

technical field [0001] The invention relates to the technical field of water reducers, in particular to a preparation method of a high-performance polycarboxylate water reducer. Background technique [0002] Compared with high-efficiency water-reducing agents such as naphthalene-based, melamine-based, and sulfamate, polycarboxylate-based water-reducing agents have low dosage, high water-reducing rate, good fluidity and slump retention of fresh concrete, and low shrinkage rate. Low, environmentally friendly, good compatibility with cement, admixtures and other additives, polycarboxylate water reducers have become the main direction of development and application in recent years and in the future. In recent years, my country has made great progress in the research and application of polycarboxylate water reducers, and the amount of polycarboxylate water reducers is also increasing. [0003] In recent years, compared with ester polycarboxylate water reducers, ether polycarboxy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/06C08F2/38C08F4/40C04B24/26C04B103/30
Inventor 於定新陈刚龚晓东李斌夏海平潘冰
Owner 深圳中大新材科技有限公司
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