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[Chemical Knowledge]：Manufacturing method and process of water reducing agent

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Water reducing agent is an important chemical raw material, which is widely used in concrete, mortar and other fields. It can improve the working performance and strength of concrete, reduce the amount of water and improve the construction efficiency. This article will introduce the manufacturing method of water reducing agent.

1. raw material preparation

1. acrylic acid: acrylic acid is the main raw material for the preparation of water reducing agent, commonly used are methyl acrylate, ethyl acrylate and so on.

2 polymerization monomer: polymerization monomer can be copolymerized with acrylic acid, commonly used are methyl methacrylate, styrene and so on.

3. initiator: initiator is a material that initiates the polymerization reaction, commonly used are persulfate, redox initiator, etc.

4. Dispersant: Dispersant can prevent polymer particle agglomeration, commonly used polycarboxylate, etc.

2. preparation process

1. polymerization reaction

acrylic acid, polymerization monomer, initiator and other raw materials according to a certain proportion into the reaction kettle, polymerization reaction. The polymerization may be carried out by an aqueous solution polymerization method or an emulsion polymerization method, and the specific method varies depending on the raw materials and the production equipment.

In the polymerization process, it is necessary to control the reaction temperature, time and pH value to ensure the quality and stability of the product. At the same time, it is necessary to regularly sample the molecular weight, distribution and performance of the polymer to ensure product quality.

2. Post-treatment

After the polymerization reaction is completed, post-treatment is required, including filtration, drying, crushing and other processes to obtain the final water reducing agent product. In the post-processing process, it is necessary to pay attention to the control of product particle size, fluidity and other performance indicators to ensure the application performance of the product.
Precautions for
3.

1. Strictly control the quality of raw materials to ensure product stability and reliability.

2. During the polymerization reaction, it is necessary to pay close attention to the control of reaction temperature and time to avoid side reactions and product quality problems.

3. In the post-processing process, it is necessary to pay attention to the control of product particle size, fluidity and other performance indicators to ensure the application performance of the product.

4. In the production process, it is necessary to strengthen safety management, comply with relevant regulations and standards, and ensure production safety.

In short, the manufacturing method of water reducing agent needs to strictly control the quality of raw materials, polymerization reaction and post-treatment process and other key links to ensure product quality and application performance. At the same time, it is necessary to strengthen the safety management in the production process to ensure production safety.

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