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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 pertinence, poor adaptability, poor stability, etc.

Active Publication Date: 2012-11-21
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 allyl polyoxyethylene ether, 6g sodium methacrylate and 100g water are placed in the reactor; 10g maleic anhydride, 0.2g copper bromide, 0.2g1, 10-phenanthroline and 20g Water was prepared as aqueous solution A, and 1 g of ammonium persulfate and 30 g of water were prepared as aqueous solution B. The reaction kettle began to heat up under nitrogen protection. When the temperature reaches 75-95°C, the aqueous solutions A and B are added dropwise at the same time, and the dropwise addition time is 3 hours; after the dropwise addition, the reaction is continued for 1 hour. After the reaction, 20 g of sodium hydroxide was added for neutralization, and 30 g of water was added to dilute to a concentration of 40% to obtain a finished product.

Embodiment 2

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

Embodiment 3

[0021] 100g methyl alkenyl polyoxyethylene ether, 5g sodium vinyl sulfonate and 100g water are placed in the reactor; 30g methacrylic acid, 0.1g cuprous bromide, 0.5g 4,4'-bis(5- Nonyl)-2,2'-bipyridine and 20 g of water were prepared as aqueous solution A, and 3 g of hydrogen peroxide and 30 g of water were prepared as aqueous solution B. The reaction kettle began to heat up under nitrogen protection. When the temperature reaches 75-95°C, the aqueous solutions A and B are added dropwise at the same time, and the dropwise addition time is 4 hours; after the dropwise addition, the reaction is continued for 1 hour. After the reaction, 5 g of sodium hydroxide was added for neutralization, and 60 g of water was added to dilute to a concentration of 40% to obtain a finished product.

[0022] Refer to GB1345-2005 for cement fineness inspection method; refer to GB8074-87 for cement specific surface area inspection method; refer to JC / T667-2004 for concrete performance test, in which ...

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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 polycarboxylic acid-based grinding aid for cement. Background technique [0002] Energy conservation and emission reduction and the development of a low-carbon economy have become the fundamental prerequisites for my country's economic development. Global warming is aggravating, energy saving and emission reduction are the general trend of the world. In order to achieve the national energy-saving goal, 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 of the comprehensive energy consumption of the cement industry has a decisive influence on the decline of the national comprehensive energ...

Claims

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Application Information

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Patent Type & Authority Patents(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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