Condensation method for preparation of poly carboxylic acid water-reducing agent

A technology of water reducing agent and polycarboxylic acid, which is applied in the concentrated field of preparing polycarboxylic acid water reducing agent, can solve the problems of high energy consumption, high cost, long time and the like, and achieves low energy consumption, low production cost, inorganic The effect of salt reduction

Inactive Publication Date: 2009-07-01
FUKE TECH (SUZHOU) CO LTD
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Problems solved by technology

[0014] The invention provides a concentration method for preparing polycarboxylate water reducer, the purpose of which is to solve the problems of high energy consumption, long time and high cost of the concentration method used in the past after the completion of the polymer synthesis process

Method used

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Examples

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Embodiment

[0030] Example: A concentration method in the preparation of polycarboxylic acid water-reducing agent. In the process of producing polycarboxylic acid water-reducing agent polymer, if the solid content of the polymerized monomer is 20%, after the polymerization reaction The solid content of the polycarboxylic acid water reducing agent is also about 20%, and the temperature of the reactant is generally 70-100°C. When the polymer synthesis process is over, put the polymer water-containing system in the original reactor or transfer it to other containers, stop stirring to make the whole system stand still (still stop), and begin to cool down at the same time. During the cooling process, the polymer It will begin to separate from the water system and precipitate in the lower part of the container. When the precipitation is complete, the solid content of the concentrated polymer precipitated in the lower part of the container is more than 50%, and the solid content of the polymer in th...

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Abstract

A method for concentrating polycarboxylate water-reducers, characterized in that: in the process of producing polycarboxylate water-reducers high molecular polymers, after the polymer synthesis process is completed, the aqueous system of the polymers is directly In the reactor or transferred to other containers, from the temperature after the synthesis process to static, while cooling down, the polymer is separated from the water system and precipitated in the lower part of the container, and then the precipitated polymer is separated by physical methods The product is separated from water to obtain a concentrated aqueous polycarboxylate polymer product. Compared with the previous concentration methods using heating evaporation, depressurization evaporation or the combination of the two, the present invention has lower requirements on equipment, less energy consumption, simple production process, low cost and high water reduction rate.

Description

Technical field [0001] The invention relates to a concrete admixture, in particular to a concentration method in the preparation of a polycarboxylic acid water reducing agent. The method belongs to the post-treatment process in the preparation process of the polycarboxylic acid water reducing agent. Background technique [0002] With the rapid development of the concrete industry, the use of concrete admixtures to improve the performance of concrete has attracted more and more attention. Especially in water conservancy projects, road projects and high-rise building projects, there are higher requirements for the durability of concrete. Therefore, the use of concrete water-reducing agents to improve its durability has become an important way to improve the performance of concrete. [0003] In the prior art, there are many types of concrete water-reducing agents, among them, there is a polycarboxylic acid-based concrete water-reducing agent. The production materials and preparation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B24/04C04B103/30
Inventor 傅雁
Owner FUKE TECH (SUZHOU) CO LTD
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