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 concentration field in the preparation of polycarboxylic acid water reducing agent, can solve the problems of high cost, long time, large energy consumption, etc., and achieve low production cost, reduced inorganic salt content, The effect of low energy consumption

Inactive Publication Date: 2006-10-11
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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Embodiment

[0031] Embodiment: A kind of concentration method in preparing polycarboxylate water-reducer, in the process of producing polycarboxylate water-reducer macromolecular polymer, if the solid content of polymerization monomer added is 20%, after polymerization reaction The solid content of the polycarboxylate superplasticizer is also about 20%, and the temperature of the reactants is generally 70-100°C. After the polymer synthesis process is finished, the aqueous system of the polymer is transferred to other containers in the original reactor, and the stirring is stopped so that the whole system is in a static state, and the temperature starts to drop at the same time. During the cooling process, the polymer Will start to be separated 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 th...

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Abstract

The invention relates to an enriching method of preparing polycarboxylic acids water reducer, is characterized in that: during the process of producing polycarboxylic acids water reducer high molecular polymer, when synthesis of polymer is end, directly leaving polymer aqueous system in original reactor or shifting to other container, stewing and cooling, making polymer separated from water systerm and depositing at the bottom of the container, separating polymer from water with physical means, to get condensation aqueous polycarboxylic acids product. Compared with traditional enriching method using heating evaporation, decompression evaporation, or combining both, the method has low apparatus requirement, small energy consumption, simple productive technology, low cost and high water reducing ration.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a concentration method in the preparation of a polycarboxylate water reducer. The method belongs to the post-treatment process in the preparation process of the polycarboxylate water reducer. 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 is a higher requirement for the durability of concrete, so using concrete water reducing agent 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-reducers, among which there is a polycarboxylate-based concrete water-reducer. Its production raw materials and preparation methods can refer to the following patent ...

Claims

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Application Information

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