High-end ethyl silicone oil has broken through multiple technical bottlenecks, and the process of domestic substitution continues to accelerate

1. Technological upgrading leads to a leap in performance
Recently, the domestic ethyl silicone oil industry has achieved a series of breakthroughs in core technology fields, and the performance of high-viscosity products has reached the international advanced level. By optimizing the polymerization process and catalyst system, the product purity has achieved an ultra-high standard of metal impurity content ≤10ppb, the viscosity range has been successfully expanded to 50,000-1,000,000 cSt, and the batch consistency has been controlled within the strict range of PDI≤1.8. Relying on microchannel reactors and online viscosity monitoring technology, the product qualification rate has been significantly increased, and the unit energy consumption has been reduced by 18%, significantly enhancing the core competitiveness.


2. Applications in high-end manufacturing have flourished across the board
With its excellent low-temperature resistance, hydrophobicity and dielectric stability, ethyl silicone oil has been widely applied in high-end manufacturing scenarios. In the field of advanced semiconductor packaging, its low volatile matter characteristic meets the precise requirements of chip packaging. The stability of the product in the battery sealing and electronic control system of new energy vehicles under extreme working conditions ranging from -60 ℃ to 200℃ has been verified. In the packaging of N-type photovoltaic modules, as a key modification additive, it effectively reduces the water vapor transmission rate, with a consumption of 12 to 15 tons per GW module. In the field of rail transit, ultra-high purity models have been successfully applied to the lubrication systems of high-speed rail bearings.


3. Remarkable achievements have been made in domestic substitution
In recent years, domestic industries have established a full-chain production capacity from monomer synthesis to polymerization and refining through vertical integration layout, effectively reducing the impact of fluctuations in raw material costs. Data shows that the domestic import dependence on ethyl silicone oil has decreased by nearly 40% from 2020 to 2024. Medium and low viscosity products have achieved full self-supply, and the high-end field has gradually broken through overseas technological barriers. In 2024, the application proportion in the electronic and electrical field has reached 38.6%, becoming the largest single consumer segment. The recognition of domestic products in high-end manufacturing continues to rise.


4. Focus on breakthroughs in more high-end scenarios in the future
Looking ahead to 2025 to 2030, the industry will focus on developing high value-added products such as electronic and medical grades. In the medical field, biocompatible improved products have entered the verification stage and are expected to be applied to interventional catheters and other medical devices in the future. The application of lubrication systems in the aerospace field is advancing small-batch verification and further expanding the boundaries of high-end applications. With the continuous iteration of technology, domestic ethyl silicone oil will play a key role in more strategic emerging industries.