Organic Silicon Series

Silicone defoamer is a chemical additive widely used in industrial production. Its main function is to eliminate and inhibit foam generated in the production process. The following is a detailed introduction to silicone defoamers:

1、 Definition and main components

• definition：Silicone defoamer is an auxiliary agent that can eliminate and inhibit the formation of foam during production.

• Main components：Its main components are silicone oil and organic silicon components. This silicone oil is a non-volatile oily liquid at room temperature and is insoluble or has very low solubility in water, animal and vegetable oils, and mineral oils.

2、 Characteristics

1. Chemical properties：Inert, physically stable, and non biologically active.

2. Heat and cold resistance：It can withstand both high and low temperatures, for example, commonly used dimethyl silicone oil can withstand 150 ℃ for a long time and over 300 ℃ for a short time.

3. surface tension：The surface tension of silicone oil is relatively small, usually 20-21 dynes/cm, which is lower than that of water (72 dynes/cm) and general foaming liquids, thus having excellent defoaming performance.

4. Compatibility：It has good compatibility with most chemicals and can be safely used in various formulations.

3、 Application Fields

• chemical industry：Suitable for defoaming in chemical production processes, such as chemical reactions, heat exchange, centrifugal separation, etc., it can improve the efficiency of production processes and product quality.

• papermaking：Effectively eliminate foam in the process of slurry preparation, paper printing, paper drying, etc., and improve the quality and production efficiency of paper.

• coating：Suitable for coating production, painting, and storage, improving the uniformity and stability of coatings.

• spin：Eliminate foam in yarn processing, fabric printing and dyeing, wastewater treatment and other processes to improve fabric quality and production efficiency.

• other：It is also suitable for defoaming in other industrial fields such as food, pharmaceuticals, petroleum, and electricity.

4、 Advantages

1. Efficiency：It can defoaming rapidly and has excellent defoaming effect on various foam systems.

2. stability：Not easily affected by environmental factors such as temperature and humidity.

3. Security：Harmless to human body and environment, it is a relatively safe defoamer.

5、 Disadvantages

1. Difficult to clean：During use, it may remain in the system and require the use of a large amount of solvents or high-temperature cleaning methods to clean thoroughly, which may increase production costs.

2. Has an impact on some materials：May have an impact on the surface properties of some materials, thereby affecting their corrosion resistance, water resistance, and other properties, and should be used with caution.

3. Long term storage may lead to failure：During long-term storage, it may gradually lose its activity and requires timely use or good storage conditions to ensure its effectiveness.

6、 Usage method

• Add quantity：According to factors such as viscosity, temperature, and stirring of different foaming systems, a dosage of 0.01% to 0.03% can generally ensure ideal defoaming effect.

7、 Conclusion

Organic silicon defoamers have become an indispensable and important additive in modern industrial production due to their excellent defoaming performance and wide application fields. When using, it is necessary to comprehensively consider its advantages and disadvantages according to the specific situation, select suitable defoamers, and use them reasonably.