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Amide polyamine polycarboxylic acid high-polymer cement grinding aid and preparation method thereof

A technology of amide polyamine polycarboxylic acid and cement grinding aid, which is applied in the field of amide polyamine polycarboxylic acid polymer cement grinding aid and its preparation, and can solve problems such as unsatisfactory performance

Active Publication Date: 2013-06-12
湖南希杰斯建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing bibliography reports at present, conventional polycarboxylate grinding aids, as people such as Wang Zhenhua, Wang Dongmin report in " cement " 2010 the 5th issue 10-14 pages with maleic anhydride, acrylic acid, allyl ether, ester Such grinding aids can effectively improve the performance of cement and improve the grinding efficiency, but the performance is still not ideal.

Method used

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  • Amide polyamine polycarboxylic acid high-polymer cement grinding aid and preparation method thereof
  • Amide polyamine polycarboxylic acid high-polymer cement grinding aid and preparation method thereof
  • Amide polyamine polycarboxylic acid high-polymer cement grinding aid and preparation method thereof

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Embodiment 1

[0021] Prepare amide polyamine polycarboxylate polymer cement grinding aid Z1, add 9.8 g (0.1 mol) maleic anhydride, 5.76 g (0.08 mol) acrylic acid, 9.81 g (0.1 mol) allyl ether in a 250ml three-necked flask , 5.68 g (0.08 mol) of acrylamide and 85 g of water, after the temperature was raised to 55 ° C to fully dissolve the maleic anhydride, 1.14 g (5 mmol) of ammonium persulfate dissolved in 20 g of water was added dropwise at a rate of 0.5 ml / min to initiate Add the initiator dropwise while raising the temperature at 5°C / min, keep the temperature at 90°C and continue stirring for 4 h, stop stirring and keep warm for 1 h, after cooling to room temperature, adjust the pH value to 7 with 30% NaOH aqueous solution (neutral). The solid content of the synthesized amidopolyamine polycarboxylate polymer was 27.3wt%.

[0022] The infrared spectrogram of the present embodiment amide polyamine polycarboxylic acid series polymer grinding aid is as follows figure 1 shown. From figur...

Embodiment 2

[0024] Prepare the following amide polyamine polycarboxylate polymer cement grinding aid Z2, the polymerized monomers are 6.13 g (0.0625 mol) maleic anhydride, 7.2 g (0.1 mol) acrylic acid, 6.13 g (0.0625 mol) allyl ether , 7.11 g (0.1 mol) of acrylamide, 0.72 g (3.125 mmol) of initiator ammonium persulfate were dissolved in 65 g of water (?). Its preparation method is with embodiment 1.

Embodiment 3

[0026] Prepare the following amide polyamine polycarboxylate polymer cement grinding aid Z3, the polymerized monomers are 4.9 g (0.05 mol) maleic anhydride, 8.65 g (0.12 mol) acrylic acid, 4.9 g (0.05 mol) allyl ether , 8.53 g (0.12 mol) of acrylamide, 0.57 g (2.5 mmol) of initiator ammonium persulfate were dissolved in 65 g of water. Its preparation method is with embodiment 1.

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Abstract

The invention relates to an amide polyamine polycarboxylic acid high-polymer cement grinding aid and a preparation method thereof. The amide polyamine polycarboxylic acid high-polymer cement grinding aid is prepared by carrying out free-radical polymerization on maleic anhydride, acrylamide, acrylic acid and allyl ether in certain mol ratios in a water solution under the action of an initiator under moderate temperature conditions. The amide polyamine polycarboxylic acid high-polymer cement grinding aid can enhance the cement strength and the grinding efficiency.

Description

technical field [0001] The invention relates to a polycarboxylate cement grinding aid and a preparation method thereof, in particular to an amide polyamine polycarboxylate polymer cement grinding aid and a preparation method thereof. Background technique [0002] At present, most cement grinding aids widely used at home and abroad are grinding aids with a single functional group. This type of grinding aid is mainly composed of alcohol amines such as triethanolamine, triisopropanolamine and their complex products. Its grinding efficiency is low. [0003] Most of the existing compounded multifunctional group grinding aids are small molecule compound grinding aids, which have poor performance stability and are sensitive to changes in dosage. [0004] Synthetic polymer grinding aid, combining various functional groups into the long chain of polymer, its grinding aid effect is better than compound grinding aid. Existing bibliography reports at present, conventional polycarboxyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B24/12C04B103/52
Inventor 史才军李平亮
Owner 湖南希杰斯建材科技有限公司
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