There are a variety of antifoaming agents on the market, each of which has its unique properties and application fields. According to the composition of defoamer, there are polyether type and silicone type, and so on. What is the characteristic of polyether defoamer and silicone defoamer and the difference between them?

1, first of all, from the appearance of the difference is very big, polyether defoamer is generally colorless or yellow transparent viscous liquid, and silicone defoamer is milky white viscous emulsion.

2. From the perspective of composition, polyether defoamer is mainly made of ethylene oxide (EO) and propylene oxide (PO) ring-opening polymerization, which is a kind of non-ionic water-soluble surfactant with good defoamer effect; And silicone defoamer is made of silicone grease, emulsifier, thickener and so on with water emulsification.

From the performance point of view, polyether defoamer in the case of a large number of bubbles, defoamer efficiency is relatively low, can not quickly eliminate the foam, but can be a long time foam suppression. No irritating odor, no side effects, can be spread out quickly in organic solvents, will not affect the performance of the product; However, ordinary silicone itself has no defoaming ability, and the surface tension is reduced after emulsification. At this time, the performance of rapid defoaming and defoaming can be achieved under the condition of small dosage. Moreover, due to the insolubility of silicone oil, it can be used in both water-based and oil-based systems with stable chemical properties and good defoaming effect under acid, alkali and salt conditions.

4, from the scope of application, polyether defoaming agent is widely used in the pharmaceutical industry, a variety of antibiotics (such as tetracycline, oxytetracycline, etc.), food fermentation, cosmetic production, can also be used in textile printing and dyeing, paint, coatings, circuit boards, paper and other industries; The silicone defoamer is generally used in textile slurry, industrial water treatment, mud defoamer in oil exploitation, water-based coatings and other industries that need long and fast defoamer time.

Distinguish these two kinds of antifoam agent, we will be targeted to choose them, so that not only can save costs and can achieve the ideal antifoam effect.