Preparation method of functionalized adjustable amphiprotic polycarboxylates cement grinding aid

A technology of amphoteric polycarboxylic acid and cement grinding aid, applied in the field of building materials, can solve the problems of poor stability, poor pertinence and poor adaptability.

Active Publication Date: 2011-07-27
KZJ NEW MATERIALS GROUP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at problems such as poor stability, poor pertinence, and limited adaptability of grinding aids currently on the market, the technical problem to be solved by the present invention is to provide a preparation method of a functional adjustable amphoteric polycarboxylate cement grinding aid, which The molecular design of the grinding aid realizes its function design, and the functional adjustable amphoteric polycarboxylate cement grinding aid can improve the cement grinding efficiency and reduce the grinding power consumption

Method used

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  • Preparation method of functionalized adjustable amphiprotic polycarboxylates cement grinding aid

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Embodiment 1

[0017] 80g of allyl polyoxyethylene ether, 6g of sodium methacrylate and 100g of water were placed in the reactor; 10g of maleic anhydride, 0.2g of copper bromide, 0.2g of 1,10-phenanthroline and 20g of Water was configured as aqueous solution A, and 1 g of ammonium persulfate and 30 g of water were configured as aqueous solution B. The reaction kettle began to heat up under the protection of nitrogen gas. When the temperature reaches 75-95°C, add the aqueous solutions A and B dropwise at the same time for 3 hours; after the dropwise addition, continue the reaction for 1 hour. After the reaction, add 20g of sodium hydroxide for neutralization, and add 30g of water to dilute to 40% concentration to obtain the finished product.

Embodiment 2

[0019] 90g of methyl alkenyl polyoxyethylene ether, 4g of 2-acrylamido 2-methylpropanesulfonic acid and 100g of water are placed in the reaction kettle; 15g of acrylic acid, 0.15g of copper bromide, 0.15g of cuprous bromide , 0.3g of 2,2'-bipyridine and 20g of water are configured into aqueous solution A, and 5g of sodium persulfate and 30g of water are configured into aqueous solution B. The reaction kettle began to heat up under the protection of nitrogen gas. When the temperature reaches 75-95°C, add the aqueous solution A and B dropwise at the same time, and the dropwise addition time is 5h; after the dropwise addition, continue the reaction for 1h. After the reaction, add 10g of sodium hydroxide for neutralization, and add 30g of water to dilute to 40% concentration to obtain the finished product.

Embodiment 3

[0021] 100g of methyl alkenyl polyoxyethylene ether, 5g of sodium vinyl sulfonate and 100g of water are placed in a reactor; Nonyl)-2,2'-bipyridine and 20g of water are configured into aqueous solution A, and 3g of hydrogen peroxide and 30g of water are configured into aqueous solution B. The reaction kettle began to heat up under the protection of nitrogen gas. When the temperature reaches 75-95°C, add the aqueous solution A and B dropwise at the same time, and the dropwise addition time is 4h; after the dropwise addition, continue the reaction for 1h. After the reaction, add 5g of sodium hydroxide for neutralization, and add 60g of water to dilute to 40% concentration to obtain the finished product.

[0022] Refer to GB1345-2005 for the inspection method of cement fineness; refer to GB8074-87 for the inspection method of cement specific surface area; refer to JC / T667-2004 for concrete performance test, and the cement dosage is 307kg / m 3 , The sand rate is 45%, and the cont...

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Abstract

The invention discloses a preparation method of a functionalized adjustable amphiprotic polycarboxylates cement grinding aid. The method comprises the following steps: according to a certain ratio, adding unsaturated polyether, unsaturated sulfoacid and water in a kettle; preparing unsaturated acid, a catalyst, a ligand and water into an aqueous solution A, and preparing an initiator and water into an aqueous solution B; heating the kettle to 75-95DEG C under the protection of nitrogen, and dropwise adding the aqueous solutions A and B at the same time for 3-5 hours; after the dropwise addition is finished, reacting under heat insulation condition for 1 hour; and after the reaction is finished, adding a certain part of sodium hydroxide for neutralization, and adding water for dilution until the concentration is 40% to obtain a finished product. In the invention, an active/controllable free radical polymerization and macromolecule design theory is adopted to research and develop the functionalized adjustable amphiprotic polycarboxylates cement grinding aid aiming at the effect required by the cement grinding aid, so as to prepare the product of the functionalized adjustable cement grinding aid.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of a functionalized adjustable amphoteric polycarboxylate cement grinding aid. Background technique [0002] Energy conservation and emission reduction and the development of low-carbon economy have become the fundamental premise of my country's economic development. As the situation of global warming intensifies, energy conservation and emission reduction is the general trend of the world. In order to achieve the overall goal of national energy conservation, the state will enforce product energy consumption quota standards for key industries. The cement industry is a typical energy-consuming industry, and its total energy consumption accounts for more than 5% of the country's total energy consumption. The decline in the comprehensive energy consumption of the cement industry has a decisive impact on the decline in the country's compr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F290/06C04B24/16C04B103/52
Inventor 方云辉郑飞龙龚明子林添兴于飞宇麻秀星
Owner KZJ NEW MATERIALS GROUP CO LTD
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