What is a modified silicone oil type defoamer
Modified silicone oil introduces methyl silicone oil with some hydrophilic polyether segments, which can be turned into a self-emulsifying defoamer, maintains dispersibility in the foaming system for a long time, and prolongs the service life of the defoamer. The commonly used modified silicone oils currently used as defoaming agents include polyether silicone oil, fluorocarbon-based silicone oil and long-chain alkyl silicone oil, and their applications and effects are eye-catching.

End group, side group and branched polyether silicone oil can be used as defoamer. They all have a well-defined cloud point, and only above the cloud point have strong defoaming properties, while below the cloud point they promote foaming. In addition, using the strong emulsifying ability of polyether silicone oil and compounding with silicone paste, it can self-emulsify into a stable and efficient defoamer in the water system. It has been widely used for high-temperature dyeing of polyester fibers, various lubricating oils, cutting Defoaming of oil, antifreeze and strong acid systems.

Long-chain alkyl silicone oil defoamer can be used in fields such as fermentation, food addition, medical treatment, textile, petroleum, synthetic rubber and resin, coating and ink. Due to its good affinity for organic materials, long-chain alkyl silicone oil defoamer will not affect the post-processing properties of the product. However, the surface tension increases with the increase of carbon chain, and the defoaming performance decreases accordingly, so it is very important to choose the appropriate carbon chain length. Long-chain alkyl silicone oils are used in defoaming of both non-aqueous and aqueous systems.

The surface tension of fluorocarbon-based silicone oil is lower than that of other silicone oils, so the defoamer formulated from it is more effective in reducing the surface tension of various foaming systems, and the effect is better than other silicone oil defoamer. Mainly used for the foaming medium of non-aqueous systems with strong solubility to methyl silicone oil or methyl phenyl silicone oil, such as aliphatic hydrocarbons, aromatic hydrocarbons and naphtha.