Ethyl Siloxane Fluid, also known as polydiethylsiloxane, is an organic silicon compound with silicon oxygen bonds as the main chain and ethyl as the side chain. Its molecular formula is C ₄ₙ₊₁₂ H ∝₀₊₁₀ₙ Si ₙ₊₂ O ₙ₊₁, CAS number 63148-61-8, it appears as a colorless to light yellow transparent liquid with a density of 0.95-1.05g/cm ³, a flash point exceeding 265 ℃ (open cup), a melting point below -70 ℃, and a working temperature range covering -60 ℃ to 150 ℃. Due to its excellent lubricity, dielectric properties, chemical corrosion resistance, and thermal stability, ethyl silicone oil has become a core material in industries such as electronics, cosmetics, and pharmaceuticals.


The 'all-around player' in the industrial field
In the industrial field, the application of ethyl silicone oil runs through the entire production chain. As a release agent, its low surface tension characteristics ensure that rubber and plastic products can be easily released during the molding process, avoiding adhesion damage; As a hydraulic oil and instrument oil, its wide temperature range (-70 ℃ to 150 ℃) performance can ensure stable operation of equipment in extremely cold or high temperature environments; As a special lubricant, its chemical corrosion resistance makes it an ideal lubricant for chemical machinery and precision instruments. In addition, ethyl silicone oil can also be used as a plasticizer to improve rubber flexibility, or as a heat transfer medium for temperature control systems in chemical reaction vessels.


The 'invisible guardian' of the electronics industry
Electronic devices require extremely high insulation, sealing, and temperature resistance of materials, and ethyl silicone oil precisely meets these requirements. In transformers and capacitors, their excellent dielectric properties can effectively prevent circuit short circuits; As a protective coating for printed circuit boards, it can block moisture from entering and prevent short circuit faults; As a sealing material, it can prevent dust and moisture from entering the interior of devices such as smartphones and computers, extending their service life. Its lubrication performance can also be used for bearing lubrication of electronic equipment fans and motors, reducing friction losses.


The 'safety partner' of cosmetics and medicine
In the cosmetics field, ethyl silicone oil has become the key ingredient of face cream, lipstick, sunscreen and other products due to its non-toxic and non irritating properties. Its lubricity and waterproofness can enhance the user experience of the product, while also increasing breathability and durability. In the field of medicine, ethyl silicone oil is used to manufacture medical lubricants, ointment bases, and medical device sealing materials. Its chemical inertness ensures safety when in contact with the human body.


Technological breakthrough: The rise of low ring vinyl silicone oil
Traditional vinyl silicone oil requires secondary vulcanization due to its high ring content, and its volatility affects the performance of downstream products. In 2025, a certain enterprise successfully mass-produced low ring vinyl silicone oil through technological upgrades, with an annual production capacity of 5000 tons. This product achieves low viscosity and low volatility characteristics through automatic and precise control throughout the entire process, meeting environmental regulations such as REACH and RoHS in the European Union. It has become a high-end solution in fields such as electronic packaging, biomedical materials, and high-temperature lubrication.