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[Chemical Knowledge]：Manufacturing method and process of elastomer polyether

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Manufacturing method
of elastomer polyether
Elastomer polyether is an important raw material for chemical production, which is widely used in polyurethane, rubber, coating and other fields. This article will introduce the manufacturing method of elastomer polyether, including raw material preparation, polymerization reaction, post-treatment and other steps.

1. Raw Material Preparation
The following raw materials need to be prepared for the manufacture of
elastomer polyether:

1. Polyols: Commonly used polyols include ethylene glycol, propylene glycol, butylene glycol, etc., which are used as initiators for polymerization reactions.
2. Ethylene Oxide: Ethylene oxide is a polymerized monomer that reacts with polyols to form polyether segments.
3. Catalyst: Used to promote the progress of the polymerization reaction, commonly used catalysts include basic catalysts and acidic catalysts.

2. Polymerization

elastomer polyether is manufactured by polymerization, which is generally divided into batch and continuous production methods. The following batch production method is used as an example to introduce the steps of the polymerization reaction:

1. add the polyol into the reactor and heat it to the specified temperature.
2. Add the catalyst and stir well.
3. Slowly add ethylene oxide dropwise to control the reaction rate and gradually increase the molecular weight of polyether.
4. Monitor the reaction temperature, pressure, viscosity and other parameters to ensure the stability of the reaction process.
5. After completion of the reaction, post-treatment is carried out.

3. Post-Treatment
After completion of the
polymerization reaction, the following post-treatment steps are required:

1. Catalyst removal: Catalyst residue is removed with an acidic or basic absorbent.
2. Degassing: The polymer is freed of residual gases under vacuum.
3. Filtration: Impurities and insoluble materials in the polymer were filtered off.
4. Packaging: The elastomeric polyether shall be packaged in accordance with the specified requirements for storage and transportation.
Precautions for
4.

In the manufacturing process of elastomer polyether, the following matters need to be paid attention to:

1. Strictly control the quality and proportion of raw materials to ensure stable product quality.
2. Keep the temperature and pressure in the reactor stable and prevent abnormal polymerization.
3. Monitor the polymer molecular weight, viscosity and other parameters in time to ensure that the product meets the specified requirements.
4. In the post-treatment process, the catalyst residue should be completely removed so as not to affect the product quality.
5. Pay attention to safety in the production process and abide by relevant laws and regulations and operating procedures.

In short, the manufacture of elastomeric polyethers requires strict control of raw materials, reaction conditions and post-treatment steps to ensure product quality and production safety. At the same time, production enterprises need to have the corresponding production qualifications and technical strength to ensure the smooth progress of the production process.

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