Dimethylsilicone oil


Dimethylsilicone oil, as a multi-functional chemical, plays an important role in many industrial fields, especially in its application as a defoamer, showing excellent properties. The viscosity, a key attribute, directly determines the defoaming effect of dimethyl silicone oil in different scenarios. This article will discuss the viscosity selection of dimethyl silicone oil defoamer in depth to help readers better understand and apply this chemical.





I. Viscosity range and application scenarios


The viscosity of dimethylsilicone oil defoamer ranges from 5cSt to 1000000cSt. This wide viscosity range allows dimethylsilicone oil to be adapted to a wide variety of application scenarios and needs.






Low viscosity (5-50cSt) :


This type of dimethyl silicone oil is suitable for systems requiring rapid diffusion defoaming, such as water-based systems. They can quickly diffuse in the system, quickly reach the surface of the foam, and play a role in defoaming. Low viscosity dimethylsilicone oil, with its excellent diffusivity and defoaming speed, is the preferred choice in water-based systems.






High viscosity (1000-1000000cSt) :


High-viscosity dimethicone is more suitable for oil-based systems or systems that require high durability. In these systems, the high-viscosity dimethylsilicone oil can maintain the defoaming effect for a longer time, and can better play its chemical stability and other properties in an oily environment. High-viscosity dimethicone oil, with its long-lasting defoaming ability and chemical stability, is a leader in oil-based systems.






Second, the application advantages of dimethyl silicone oil with different viscosity


Low viscosity dimethyl silicone oil:


Application scenario: Water-based system, fast defoaming requirements.


Advantages: Easy to diffuse, can quickly reach the foam surface, to achieve rapid defoaming. Low viscosity dimethyl silicone oil, with its efficient defoaming speed, is the ideal choice to solve the need for fast defoaming.






High viscosity dimethyl silicone oil:


Application scenario: oil-based system, the need for permanent defoaming.


Advantages: Good durability, can play a stable role in oily environment. High viscosity dimethylsilicone oil, with its persistent defoaming ability and adaptability to oily environments, has become the preferred solution to solve the needs of long-lasting defoaming






Third, mix dimethyl silicone oil with different viscosity


In order to achieve the best results, it is sometimes necessary to mix dimethyl silicone oils with different viscosities. For example, mixing three parts of dimethylsilicone oil with a viscosity of 100 cSt and one part of dimethylsilicone oil with a viscosity of 12,500 cSt can achieve better defoaming in some specific application scenarios. This hybrid method not only combines the rapid diffusivity of low viscosity silicone oil, but also plays the durable defoaming ability of high viscosity silicone oil, so as to achieve the optimization of defoaming effect.






4. Precautions for use


Addition amount:


The recommended dosage ranges from 0.001 to 0.003, but the specific dosage should be adjusted according to the actual application scenario. Excessive addition amount may lead to uneven distribution of defoamer in the system and affect the defoamer effect. However, too little addition may not be able to fully play the role of defoamer.






Conditions of use:


Dimethylsilicone oil defoamer has good water solubility, can be quickly dispersed in water, and has good chemical stability, suitable for use in high temperature, strong acid and base environment. This property makes dimethylsilicone oil defoamer can still play an excellent defoaming effect under a variety of harsh conditions.