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Polycarboxylic acid series high molecular synthetic cement grinding additive and preparation method thereof

A cement grinding aid and polycarboxylic acid-based technology, which is applied in the field of cement grinding aids, can solve the problems of inability to satisfy cement grinding aids, difficult to control the cost, and depend on the price of raw materials, and achieve easy cost control, easy industrial production, Stable performance

Active Publication Date: 2012-12-26
唐山市龙亿科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Cement grinding aids can effectively prevent the automatic agglomeration of cement particles and improve the energy conversion rate of the cement grinding process. At present, most cement grinding aids on the market are obtained by compounding polyols and alcohol amines. However, due to these cement aids The stability of the grinding agent is poor, and the change of the dosage has a great impact on its performance, and its raw material is mainly triethanolamine, and the price of the raw material is too dependent on the price of crude oil, which makes the cost difficult to control, so that it cannot meet the high standard of the market for cement grinding aids requirements

Method used

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  • Polycarboxylic acid series high molecular synthetic cement grinding additive and preparation method thereof
  • Polycarboxylic acid series high molecular synthetic cement grinding additive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] Put 50 parts of diethanolamine (it can also be replaced by one of monoethanolamine and triisopropanolamine) and 1000 parts of water into the reaction kettle equipped with a stirring device and a temperature display device in turn, and then put 20 parts of horses into the reaction kettle. Maleic anhydride (can also be replaced by one of maleic acid and methacrylic acid), when adding maleic anhydride, turn on the stirring device to stir and heat, and stabilize the temperature at 70°C to ensure that the reaction temperature is 70°C Under the condition of carrying out, after reacting for 1 hour, obtain maleic acid amide. Then 200 parts of allyl polyethylene glycol with a molecular weight of 1000 (it can also be replaced by one of allyl polyoxyethylene or polyoxypropylene ether with an average relative molecular weight of 500-3000) and 7 parts of ammonium persulfate (It can also be replaced by one of potassium persulfate or sodium persulfate) successively drop into the malei...

example 2

[0023] Put 70 parts of diethanolamine (which can also be replaced by one of monoethanolamine and triisopropanolamine) and 1100 parts of water into the reaction kettle equipped with a stirring device and a temperature display device in sequence, and then put 30 parts of horses into the reaction kettle. Maleic anhydride (can also be replaced by one of maleic acid and methacrylic acid), when adding maleic anhydride, turn on the stirring device to stir and heat, and stabilize the temperature at 70°C to ensure that the reaction temperature is 70°C Under the condition of carrying out, after reacting for 1 hour, obtain maleic acid amide. Then 300 parts of allyl polyethylene glycol with a molecular weight of 1000 (it can also be replaced by one of allyl polyoxyethylene or polyoxypropylene ether with an average relative molecular weight of 500-3000) and 10 parts of ammonium persulfate (It can also be replaced by one of potassium persulfate or sodium persulfate) successively drop into t...

example 3

[0025] Put 80 parts of diethanolamine (which can also be replaced by one of monoethanolamine and triisopropanolamine) and 1200 parts of water into the reaction kettle equipped with stirring device and temperature display device in sequence, and then put 40 parts of horses into the reaction kettle. Maleic anhydride (can also be replaced by one of maleic acid and methacrylic acid), when adding maleic anhydride, turn on the stirring device to stir and heat, and stabilize the temperature at 70°C to ensure that the reaction temperature is 70°C Under the condition of carrying out, after reacting for 1 hour, obtain maleic acid amide. Then 400 parts of allyl polyethylene glycol with a molecular weight of 1000 (it can also be replaced by one of allyl polyoxyethylene or polyoxypropylene ether with an average relative molecular weight of 500-3000) and 7 parts of ammonium persulfate (It can also be replaced by one of potassium persulfate or sodium persulfate) successively drop into the ma...

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Abstract

The invention discloses a polycarboxylic acid series high molecular synthetic cement grinding additive. The polycarboxylic acid series high molecular synthetic cement grinding additive is prepared from the following raw materials in parts by weight: 50-100 parts of alkylol amine substance, 20-50 parts of unsaturated acid, 1,000-1,500 parts of water, 100-400 parts of unsaturated monomer and 5-10 parts of initiator. According to the invention, a process flow for preparing the conventional grinding additive is simplified to be one-step synthesis from the process flow of esterification, polymerization and compounding, the process is simple and industrial production is easy to realize.

Description

technical field [0001] The invention relates to the field of cement grinding aids, in particular to a polycarboxylic acid-based polymer synthetic cement grinding aid and a preparation method thereof. Background technique [0002] The cement industry is a high-energy-consuming industry. The process of grinding cement is the process of converting electrical energy into the surface energy of cement product particles, but the energy conversion rate of the cement grinding process is only about 3%. In addition, when the cement particles are refined, they tend to agglomerate automatically. Cement grinding aids can effectively prevent the automatic agglomeration of cement particles and improve the energy conversion rate of the cement grinding process. At present, most cement grinding aids on the market are obtained by compounding polyols and alcohol amines. However, due to these cement aids The stability of the grinding agent is poor, and the change of the dosage has a great impact...

Claims

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Application Information

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IPC IPC(8): C04B24/26C08F290/06C08F283/06C04B103/52
Inventor 魏文龙魏中原陈绍奇
Owner 唐山市龙亿科技开发有限公司
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