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Polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof

A technology of grinding aid enhancer and polyethylene glycol is applied in the field of cement grinding aid, which can solve the problems of unstable performance and narrow application range, and achieve the effect of good grinding aid effect, good enhancement effect and stable performance.

Active Publication Date: 2010-08-11
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of grinding aid is not a synthetic grinding aid in the true sense. Although it can reduce part of the cost, it has disadvantages such as unstable performance and narrow application range.

Method used

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  • Polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof
  • Polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof
  • Polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of polyethylene glycol maleate

[0020] Add 60 parts of polyethylene glycol with a molecular weight of 600 and 20 parts of maleic anhydride into a reactor equipped with mechanical stirring, raise the temperature to 60°C, and after the two are compatible, add 2 parts of p-toluenesulfonic acid, 70°C After 4h, the polyethylene glycol maleate was obtained, and the esterification rate was 91.4%.

[0021] (2) Preparation of polycarboxylate cement activated grinding aid enhancer

[0022] 70 parts of allyl polyethylene glycol with a molecular weight of 700, 30 parts of (meth) allyl sodium sulfonate, 80 parts of ethylene glycol, and 600 parts of water were respectively added to the esterification product in sequence, heated and continuously stirred, Add 4 parts of ammonium persulfate dropwise, raise the temperature to 90°C after dropping, finish the reaction after 7 hours of reaction, adjust the pH to neutral with sodium hydroxide solution, control the solid con...

Embodiment 2

[0024] (1) Preparation of polyethylene glycol maleate

[0025] Add 80 parts of polyethylene glycol 800 and 20 parts of maleic anhydride into a reactor equipped with mechanical stirring, raise the temperature to 60°C, after the two are compatible, add 3 parts of p-toluenesulfonic acid, and esterify at 70°C for 4h , to obtain polyethylene glycol monomethyl ether maleate with an esterification rate of 89.4%.

[0026] (2) Preparation of polycarboxylate cement activated grinding aid enhancer

[0027] 100 parts of allyl polyethylene glycol with a molecular weight of 1000, 30 parts of (meth) allyl sodium sulfonate, 200 parts of ethylene glycol, and 1000 parts of water were respectively added to the esterification product in sequence, heated and continuously stirred, Add 5 parts of ammonium persulfate dropwise, raise the temperature to 90°C after dropping, finish the reaction after 7 hours of reaction, adjust the pH to neutral with sodium hydroxide solution, control the solid content...

Embodiment 3

[0029] (1) Preparation of polyethylene glycol maleate

[0030] Add 100 parts of polyethylene glycol 1000 and 20 parts of maleic anhydride into a reactor equipped with mechanical stirring, raise the temperature to 60°C, stir mechanically, after the two are compatible, add 4 parts of p-toluenesulfonic acid, After esterification for 5 hours, polyethylene glycol maleate was obtained, and the esterification rate was 83.2%.

[0031] (2) Preparation of polycarboxylate cement activated grinding aid enhancer

[0032] Add 200 parts of allyl polyethylene glycol with a molecular weight of 2000, 30 parts of (meth) allyl sodium sulfonate, 350 parts of ethylene glycol, and 1400 parts of water into the esterification product in sequence, mix and stir evenly, and heat Stir continuously, add 8 parts of ammonium persulfate dropwise, heat up to 95°C after dropping, finish the reaction after 8 hours of reaction, adjust the pH to neutral with sodium hydroxide solution, and control the solid conten...

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Abstract

The invention belongs to the cement grinding aid technical field, in particular relates to a polycarboxylic acid cement activation reinforced grinding aid and preparation method thereof. The grinding aid adopts polyoxyethylene ether and unsaturated carboxylic acid for carrying out esterification, then polyoxyethylene ether ester, alkyl polyethylene glycol, (methyl) sodium alkyl sulphate, polyalcohol and water are polymerized to prepare a polycarboxylic acid cement activation reinforced grinding aid. Compared with the existing polycarboxylic acid compound cement grinding aid, the invention adopts high polymer to synthesize and prepare polycarboxylic acid cement activation reinforced grinding aid, a high polymer synthesized cement grinding aid in real meaning; the polycarboxylic acid cement activation reinforced grinding aid has no chloride, stable performance and obvious grinding reinforcing effect. When dosage is 0.01-0.1% of cement weight, grinding machine hourly output is improved by 10-20%, strength of cement for three days can be increased by 2-6MPa, strength for 28 days can be increased by 4-8MPa, thus having better market prospect and economic benefit.

Description

technical field [0001] The invention relates to a cement grinding aid. More specifically, the invention relates to a polycarboxylate cement activated grinding aid enhancer and a preparation method thereof, which are suitable for cement manufacturers to improve cement grinding effect and cement performance. Background technique [0002] In order to improve the grinding efficiency of the mill, reduce unit energy consumption, reduce cement fineness, and improve cement quality, cement grinding process additives, namely cement grinding aids, are used in the cement grinding process, which greatly reduces the grinding time. and energy consumption. The cement grinding aid is usually selected from glycols containing alkylene glycols, amines or amino alcohols, etc., which are prepared through simple compounding. At present, such grinding aids can no longer fully meet the diversified and high-level needs of the market, and their performance is also unstable. With the rising price of c...

Claims

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Application Information

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IPC IPC(8): C04B24/26
CPCC04B2103/52C04B24/2641Y02P40/10
Inventor 李因文赵洪义朱化雨
Owner 安徽海螺材料科技股份有限公司
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