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Production and preparation method of polycarboxylate superplasticizer powder

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of production and preparation of polycarboxylate water reducing agent powder, can solve the problems of drop in electrokinetic potential, insufficient adsorption capacity, influence on construction of workers, etc. The effect of strong practicability and convenient construction

Inactive Publication Date: 2020-11-10
衡阳市九州建材有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a production and preparation method of polycarboxylate superplasticizer powder, which solves the existing problem that under the same conditions, a large amount of polycarboxylate water reducer has a large cement mineral content. The water agent is adsorbed by it, and if it accounts for more cement components, the adsorption amount will be insufficient, and the electrokinetic potential will drop significantly, which will lead to the loss of commercial concrete slump and affect the construction of workers.

Method used

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  • Production and preparation method of polycarboxylate superplasticizer powder
  • Production and preparation method of polycarboxylate superplasticizer powder
  • Production and preparation method of polycarboxylate superplasticizer powder

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preparation example Construction

[0028] see Figure 1-3 , the present invention provides a technical solution: a method for producing a polycarboxylate water reducer powder, the polycarboxylate water reducer comprises the following raw materials by weight: 30.2% to 41% of water, prenyl alcohol Polyoxyethylene 30%~34%, hydrogen peroxide solution 1.8%~2.1%, acrylic acid solution 4.2%~4.7%, third mixed solution 10%~13%, sodium hydroxide solution 13%~16%;

[0029] The production and preparation method of the polycarboxylate superplasticizer powder comprises the following steps:

[0030] Step 1. Add 30.2%-41% water, 30%-34% isoprenol polyoxyethylene ether, 1.8%-2.1% hydrogen peroxide solution in the reaction kettle, and then start stirring, during the stirring process The reaction kettle is heated to 55 ℃~65 ℃ to obtain the first mixed solution, and the temperature inside the reaction kettle is kept at 55 ℃~65 ℃;

[0031] Step 2, dropping 4.2%~4.7% acrylic acid solution into the first mixed solution at a uniform...

Embodiment 1

[0043] Example 1: as figure 2 , image 3 , add 41% of water, 30% of isoprenol polyoxyethylene ether, 1.8% of hydrogen peroxide solution in the reaction kettle, then start stirring, and in the process of stirring, the reaction kettle is heated to 55 ℃ ~ 65 ℃ , obtain the first mixed solution, keep the temperature inside the reactor at 55 ℃~65 ℃, drop 4.2% acrylic acid solution into the first mixed solution at a uniform speed, obtain the second mixed solution, and make the inside of the reactor The temperature is maintained at 55 ℃~65 ℃, and 10% of the third mixed solution is dropped into the second mixed solution at an even rate to obtain the fourth mixed solution with a pH value of 4, and the interior of the reactor is kept at 55 ℃~65 ℃. One hour, then reduced to 15 ° C ~ 40 ° C, 13% of sodium hydroxide was added to the fourth mixed solution and fully stirred to obtain a fifth mixed solution with a pH value of 6, and then the polycarboxylate was prepared as described above. ...

Embodiment 2

[0044] Example 2: as figure 2 , image 3 , add 36.7% of water, 32% of isopentenol polyoxyethylene ether, 1.9% of hydrogen peroxide solution in the reaction kettle, then start stirring, and the reaction kettle is heated to 55 ℃~65 ℃ in the process of stirring , obtain the first mixed solution, keep the temperature inside the reactor at 55 ℃ ~ 65 ℃, drop 4.4% acrylic acid solution into the first mixed solution at a uniform speed, obtain the second mixed solution, and make the inside of the reactor The temperature is maintained at 55 ℃~65 ℃, and 11% of the third mixed solution is dropped into the second mixed solution at an even rate to obtain the fourth mixed solution with a pH value of 4, and the interior of the reactor is kept at 55 ℃~65 ℃. One hour, and then reduced to 15 ℃ ~ 40 ℃, 14% of sodium hydroxide was added to the fourth mixed solution and fully stirred to obtain a fifth mixed solution with a pH value of 6.3, and then the polycarboxylate was prepared in the manner d...

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Abstract

The invention discloses a production and preparation method of polycarboxylate superplasticizer powder, belonging to the technical field of polycarboxylate superplasticizers. The polycarboxylate superplasticizer powder comprises 30.2%-41% of water, 30%-34% of isopentenol polyoxyethylene ether, 1.8%-2.1% of a hydrogen peroxide solution, 4.2%-4.7% of an acrylic acid solution, 10%-13% of a third mixed solution and 13%-16% of a sodium hydroxide solution. The method comprises the following steps: preparing a blocky polycarboxylate superplasticizer from the above materials, and then preparing the polycarboxylate superplasticizer powder from the blocky polycarboxylate superplasticizer in a low-temperature environment. According to the production and preparation method of the polycarboxylate superplasticizer powder, through the design of a formula and a polymerization process, the polycarboxylate superplasticizer powder which is used for concrete and enables the slump value of the concrete tomeet the requirements of pump concrete is prepared; the preparation process is simple; the polycarboxylate superplasticizer powder can be widely applied to the fields of pump concrete and mortar; construction is convenient; and practicability is high.

Description

Technical field [0001] The present invention relates to the technical field of polycarboxylate water-reducing agents, specifically a production and preparation method of polycarboxylic acid water-reducing agent powder. Background technique [0002] Water-reducing admixture refers to an admixture that can reduce the amount of mixing water and increase the strength of concrete while maintaining the workability and cement dosage of the concrete; or it can save the cement dosage while maintaining the workability and strength. Polycarboxylic acid Water-reducing agent is a high-performance water-reducing agent and a cement dispersant used in cement concrete applications. It is widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. This product is green and environmentally friendly, non-flammable and non-flammable. It can be safely transported by train and car. Polycarboxylic acid high-performance water-reducing agent is generally stored in two for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C04B24/26C04B103/30
CPCC08F283/065C04B24/2605C04B2103/302
Inventor 刘少林刘俊杰田帅廖文文凌志邓凯
Owner 衡阳市九州建材有限公司
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