Because of the special chemical structure of silicone oil, it is neither soluble with water or substances containing polar groups, nor soluble with hydrocarbons or organic compounds containing hydrocarbon groups.Because of the insolubility of silicone oil to all kinds of substances, so a wide range of applications, both the use of water system defoaming, and can be used in the oil system.Therefore, it can be used as an defoaming agent.What are the advantages of silicone defoaming agent? 

    1, the surface tension is small: the surface capacity of silicone oil is generally 20-21 dyne/cm, than water (72 dyne/cm) and the surface tension of the general foaming liquid is small, and the defoaming efficiency is good.

    2, good thermal stability: to commonly used dimethyl silicone oil as an example, it can be resistant to 150 DEG C for a long time, short time can be resistant to more than 300 DEG C, the Si-O bond does not decompose.It ensures that silicone defoaming agent can be used in a wide range of temperatures.

    3, good chemical stability: because Si-O bond is relatively stable, so the chemical stability of silicone oil is very high, it is difficult to react with other substances.Therefore, as long as the preparation is reasonable, silicone defoaming agent is allowed to be used in the system containing acid, alkali and salt.

    4, physiological inertia: silicone oil has been proven to be not toxic to humans and animals, its semi-lethal dose is greater than 34 grams/kg.So silicone defoaming agent (in suitable non-toxic emulsifier, etc.) can be safely used in food, medical, pharmaceutical and cosmetic industries.

    5. Strong defoaming power: silicone defoaming agent can not only effectively break the foam that has been generated, but also significantly inhibit the foam and prevent the formation of foam.Its use is very little, as long as the addition of foaming medium weight of one millionth (1ppm), that is, can produce defoaming effect.It is commonly used in the range of 1 to 100 PPM.It is not only low cost, but also does not pollute the defoaming material.

    The above is the advantage of silicone defoaming agent, the use of silicone defoaming agent, can play a very good effect.Of course, the use of silicone oil is not limited to silicone defoaming agent, whether it is used as defoaming agent, or lubricating oil, is a good choice.