Synthetic method of polyethylene glycol amine ester-carboxylic acid macromolecule grinding aid

A technology of polyolamine ester and synthesis method is applied in the synthesis field of preparing triisopropanolamine maleate-sodium acrylate polymer grinding aid, and can solve the problem of complex composition, high effective dosage and negative influence on cement performance. and other problems, to achieve the effects of stable physical and chemical properties, simple production process and cheap raw materials

Inactive Publication Date: 2013-05-22
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of product can generally improve the grinding aid effect by about 10%, and the short-term mechanical strength can be increased by 5~10%, but its effective dosage is high, which not only increases the cost of cement, but also reduces the stability of cement performance.
Due to the complex composition of compound grinding aid products, the grinding aid effect is unstable, and most of the products contain high salt content, which has a certain negative impact on cement performance

Method used

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  • Synthetic method of polyethylene glycol amine ester-carboxylic acid macromolecule grinding aid
  • Synthetic method of polyethylene glycol amine ester-carboxylic acid macromolecule grinding aid
  • Synthetic method of polyethylene glycol amine ester-carboxylic acid macromolecule grinding aid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the molar ratio: acrylic acid: maleic anhydride: triisopropanolamine = 1.6: 0.8: 1.0 Prepare the raw materials.

[0035] In a container equipped with a magnetic stirrer, a condenser, a thermometer and a water bath heating, add maleic anhydride and triisopropanolamine according to the above molar ratio, heat and stir for 2 hours, cool down, and dilute the esterification product with deionized water to a mass concentration of 50%, to obtain solution 1.

[0036] Acrylic acid was neutralized to pH=8 with NaOH solution, and distilled water was added to dilute the solution to acrylic acid mass concentration of 30%, to obtain solution 2.

[0037] According to the maleic anhydride: acrylic acid molar ratio is 1:1, the weighed solution 2 is added to the solution 1, and heated to a constant temperature of 90 °C; when adding the initiator ammonium persulfate dropwise, continue to add solution 2 dropwise until Until the addition is complete; the amount of the initiato...

Embodiment 2

[0039] According to the molar ratio: acrylic acid: maleic anhydride: triisopropanolamine = 2.0: 1.0: 1.0 Prepare the raw materials.

[0040] Technological process is the same with embodiment 1.

Embodiment 3

[0042] According to the molar ratio: acrylic acid: maleic anhydride: triisopropanolamine = 3.6: 1.2: 1.0 Prepare the raw materials.

[0043] Product of the present invention small grinding test verification:

[0044] The grinding aid product of the present invention obtained in Examples 1, 2, and 3 and the cement clinker without grinding aid were subjected to small grinding tests under the same conditions, and the grinding aid and strengthening effects of the polymer grinding aid were obtained in the table 1. Table 2.

[0045] Grinding aid effect of table 1 polymer grinding aid

[0046]

[0047] Remarks: Sample numbers in the above table: A0 blank sample; A1, A2, and A3 are polymer grinding aids obtained in Examples 1, 2, and 3, respectively.

[0048] The reinforcing effect of table 2 polymer grinding aid

[0049]

[0050]

[0051] Remarks: Sample numbers in the above table: A0 blank sample; A1, A2, and A3 are polymer grinding aids obtained in Examples 1, 2, and 3,...

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Abstract

The invention relates to a synthetic method of a polyethylene glycol amine ester-carboxylic acid macromolecule grinding aid. The synthetic method comprises the following steps of: weighing crylic acid, triisopropanolamine and maleic anhydride according to molar ratio of raw materials, firstly adding the maleic anhydride and the triisopropanolamine, and heating for reaction to obtain solution 1; then neutralizing the crylic acid by NaOH solution to obtain solution 2; dropwise adding an initiator peroxosulfuric acid after the two solutions are mixed, and stirring for reaction to obtain the polyethylene glycol amine ester-carboxylic acid macromolecule grinding aid. By utilizing the synthetic method, the effective mixing amount of the grinding aid can be greatly reduced to reduce the production cost.

Description

technical field [0001] The invention belongs to the field of grinding aid synthesis and relates to a synthesis method and process for preparing triisopropanolamine maleate-sodium acrylate polymer grinding aid. Background technique [0002] In the cement grinding process, a certain amount of grinding aid is added, and the surface activity and charge dispersion of the grinding aid are used to modify the surface of the material physically and chemically, thereby improving the grindability of the material and reducing the particle size. The cohesion between the ball mills improves the fluidity of the materials inside the ball mill, and realizes the purpose of energy saving and high production of the ball mill. At the same time, on the premise of not increasing the grinding time, the gradation of cement particles can be optimized, the specific surface area of ​​cement can be increased, and the early strength of cement can be improved. Cement grinding aids are divided into two ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/22C08F4/30C04B24/26C04B103/52
Inventor 黄少文洪一粟罗星
Owner NANCHANG UNIV
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