Ethyl silicone oil and vinyl silicone oil, as the two representatives of organic silicon materials, have their own focuses on performance and application. Ethyl silicone oil, with ethyl (- C ₂ H ₅) as the side chain, has lower surface tension (about 20 dynes/cm) and better lubricity, making it suitable for scenarios that require low friction coefficients, such as precision instrument lubrication and rubber demolding. Its working temperature range (-70 ℃ to 150 ℃) is also better than most traditional lubricants, and it can operate stably in extreme environments.



Vinyl silicone oil has excellent reactivity with vinyl (- CH=CH ₂) as the functional group. In semiconductor packaging, vinyl silicone oil can crosslink with hydrogen containing silicone oil through addition reactions to form a high-temperature (>300 ℃) and radiation resistant elastomer, protecting chips from mechanical impact and thermal stress damage. In addition, its viscosity can be adjusted within a wide range (10-100000 cs) to meet different process requirements. For example, LED potting adhesive requires low viscosity (<100cs) to fill small gaps, while power equipment insulation oil requires high viscosity (>10000cs) to prevent leakage.

In terms of cost, ethyl silicone oil is suitable for large-scale industrial applications due to its easy availability of raw materials (chloroethane, magnesium metal), mature production process, and price 20% -30% lower than vinyl silicone oil. The production cost of vinyl silicone oil is relatively high due to the need to control the vinyl content and molecular weight distribution, but its irreplaceability in high-end electronics and medical fields has led to sustained market growth. In 2024, the global market size of vinyl silicone oil will reach 4.5 billion US dollars, an annual increase of 12%, with electronic grade products accounting for over 60%.
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