The production process of silicone Defoamer usually includes the following main steps:
Raw material preparation
Prepare the main raw materials, such as silicone oil, silica, emulsifier, etc. Silicone oil is usually dimethyl silicone oil, emulsifiers can be a variety of non-ionic or anionic surfactants.
Pre-treatment of silicone oil
The silicone oil is refined and treated to remove impurities and water to improve the purity and quality of the silicone oil.
Dissolution of emulsifiers
Dissolve the selected emulsifier in the appropriate solvent to form a uniform emulsifier solution.
Mixing and emulsification
The pre-treated silicone oil is gradually added into the emulsifier solution, and is fully mixed and emulsified by means of high-speed stirring, homogenization or ultrasonic treatment to form an emulsion.
Silica addition (some formulations)
For some Silicone defoamer, it is necessary to add silica to enhance the defoamer performance. Silica is usually specially treated to improve its dispersibility in the system.
Adjustment and optimization
Test the stability of the emulsion, defoaming performance and other indicators, according to the need to adjust and optimize the formula and process parameters, such as adjusting the type and amount of emulsifier, mixing speed and time.
Filtration and packaging
The prepared silicone defoamer emulsion was filtered to remove possible large particle impurities, and then packaged and stored.
In the production process, it is necessary to strictly control the process parameters such as temperature, stirring speed, feeding sequence and time to ensure the quality and performance of the product.
For example, in a specialized defoamer production plant, technicians first accurately measure high-quality dimethylsilicone oil and dehydrate it under vacuum. Then, the specific emulsifier is dissolved in deionized water, heated to a certain temperature and stirred well. Next, the silicone oil is slowly added to the emulsifier solution under high speed stirring to form a fine emulsion. After that, add the appropriate amount of hydrophobic silica according to the product requirements, and continue to stir for some time. Finally, after strict testing and filtration, the qualified silicone defoamer products are put into sealed containers.
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