1、 Chemical properties: Excellent performance organic silicon compounds
Ethyl Siloxane Fluid (CAS number 63148-61-8) is an organic silicon polymer with diethylsiloxane as the main chain, with the molecular formula C ₄ₙ₊₁₂ H ∝₀₊₁₀ₙ Si ₙ₊₂ O ₙ₊₁. Its core features include:


Wide temperature range adaptability: The working temperature range covers -70 ℃ to 150 ℃, maintaining fluidity at low temperatures and not easily decomposing at high temperatures, making it suitable for extreme environments.
Chemical stability: acid and alkali resistant, oxidation resistant, can be stored for a long time in humid or corrosive environments, with a storage period of up to 3 years.
Compatibility: It is completely miscible with organic solvents such as toluene, ether, chloroform, and petroleum products, making it easy to adjust the formula.
Physical properties: Colorless to light yellow transparent liquid, density 0.95-1.05g/cm ³, flash point>265 ℃, low volatility, low surface tension.
2、 Industrial applications: lubricants and protective films in multiple fields
Electrical Insulation and Precision Instruments
Ethyl silicone oil is the core insulation material for transformers, capacitors, and printed circuit boards (PCBs), which can prevent arcing and short circuits. Its dielectric constant is stable, with high compressive strength, and as a protective coating, it can block moisture and extend equipment life. For example, in smartphones, ethyl silicone oil is used to seal key components to ensure that the waterproof and dustproof levels meet the standards.
Lubrication and shock absorption
As hydraulic oil, instrument oil, and special lubricating oil, ethyl silicone oil performs excellently in mechanical friction components. Its low viscosity coefficient and wide temperature range characteristics make it the preferred material for shock absorbers and lubricants in the aerospace and automotive industries. For example, the hydraulic system of aircraft landing gear relies on ethyl silicone oil to achieve stable operation at -50 ℃.
Demoulding and processing assistance
In the molding of rubber and plastic products, ethyl silicone oil as a release agent can reduce mold wear and improve product surface smoothness. Meanwhile, it can serve as a heat transfer agent to accelerate the vulcanization process of tire reinforcement fibers and improve production efficiency.
Chemical and Petrochemical Industry
Ethyl silicone oil is used as a catalyst carrier, defoamer, and leveling agent in the chemical industry. For example, in coating production, adding ethyl silicone oil can eliminate bubbles and improve coating uniformity.
3、 Market Size and Industrial Chain: Opportunities for China in Global Growth
market data
By 2025, the global market size of ethyl silicone oil will reach 1.276 billion yuan, with China accounting for 25% (320 million yuan). It is expected that by 2032, the global market will expand at an average annual compound growth rate of 9.43% to 2.397 billion yuan, with the Asia Pacific region leading the growth rate.
Industrial chain structure
Upstream: Silicon mining (mainly in China, the United States, and Russia) → Silicon material smelting → Organic silicon monomer synthesis (such as ethyl orthosilicate).
Midstream: Production of ethyl silicone oil (ethyl ethoxysilane is obtained by reacting chloroethane with magnesium metal, followed by hydrolysis condensation, molecular rearrangement, and vacuum distillation).
Downstream: Industrial lubrication, electronic insulation, cosmetics, pharmaceuticals and other fields.
competitive landscape
Major global manufacturers include Wacker Chemie AG, Elkem ASA, SILIBASE SILICONE, etc. Local Chinese companies such as Anhui Aiyota Silicone Oil Co., Ltd. and Hubei Jusheng Technology Co., Ltd. occupy the mid to low end market through technological iteration and cost control.
4、 Future Trends: Technology Driven and Green Transformation
High performance: Develop special ethyl silicone oil with high viscosity and high temperature resistance (>300 ℃) to meet the needs of 5G communication and new energy vehicles.
Environmental Protection: In response to the EU REACH regulation, we have developed water-based ethyl silicone oil with low volatile organic compound (VOC) content to reduce our environmental impact.
Functional compounding: Through nano modification technology, ethyl silicone oil is endowed with conductivity, thermal conductivity, or self-healing functions, expanding its applications in the fields of flexible electronics and biomedicine.