Composition difference
1. Polyether defoamer is mainly made of ring-opening polymerization of ethylene oxide and propylene oxide. It is a water-soluble surfactant and is a non-ionic system product


2. Silicone defoamer is mainly made of silicone oil, solvent and emulsifier polymerization, and is generally non-ionic system




02
Performance difference
1. Add polyether defoamer to the defoamer liquid system. When the polyether is in contact with water, it will dissolve in water from low temperature and gradually heat up until it is cloudy. The temperature at this point is its cloud point. In the process of dissolution, with the increase of water temperature, when the cloud point temperature exceeds the temperature, the polyether defoamer begins to play an excellent defoaming effect.


2. Silicone as the main raw material of silicone defoamer, in fact, there is no defoamer effect, but after emulsification, the surface tension will be rapidly reduced, just add a small amount of silicone defoamer, you can quickly achieve the purpose of defoamer.


3. Polyether is mainly used in non-surfactant systems, and organosilicon is mainly used in surfactant systems


03
Distinction of features
1. Generally speaking, polyether defoamer is non-toxic, good dispersion, good thermal stability and stable chemical properties.


2. Silicone defoamer has outstanding characteristics in application. It can be applied to water based system and oil based system, anti-oxidation, non-toxic and environmental protection.


3. Silicone emulsion stability compared with polyether, chemical stability is poor


04
Difference between advantages and disadvantages
1. Advantages: Polyether defoamer has long-lasting defoaming performance. Disadvantages: When the amount of foam is large, polyether defoamer can not eliminate the foam in time.


2. Advantages: The amount of addition is small, the defoaming effect can be achieved quickly, the defoaming effect can be suppressed for a long time, but the effect is worse than polyether defoaming agent.