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In the third quarter of 2026, a landmark industrial progress in the global organic silicone material sector was officially announced: a new generation of 10,000-ton production line covering the full manufacturing process of terminal and side chain hydrogen-containing silicone oil in China has achieved full-load stable operation. All core product indicators have reached the international advanced level, completely breaking the long-term monopoly of overseas enterprises in the field of high-activity, low-volatility high-end hydrogen-containing silicone oil. As a key intermediate connecting the upstream and downstream of the organic silicone industrial chain, hydrogen-containing silicone oil is the core raw material for dozens of downstream products such as silicone rubber crosslinking, polyether-modified silicone oil synthesis, and silicone resin preparation. Its technical level directly determines the upper limit of the development of the entire organic silicone new material industry. The implementation of this production capacity upgrade not only promotes a fundamental optimization of the supply structure of China's hydrogen-containing silicone oil industry, but also builds a solid core material foundation for the supply chain security of downstream strategic fields such as new energy, electronic information, and high-end manufacturing.
Looking back at the development history of China's hydrogen-containing silicone oil industry, the evolution of the past 30+ years has always been driven by the two-way drive of technological iteration and demand upgrading. As early as the 1990s, China realized the industrial production of general-purpose low-hydrogen-content silicone oil. However, restricted by core technical shortcomings such as catalytic systems, molecular distillation purification, and precise control of the polymerization process, domestic products have long been concentrated in the low-to-medium end market. Persistent problems such as uneven distribution of terminal and side chain active sites, high content of small molecule volatiles, and poor stability of Si-H bonds have never been completely solved, making it impossible to meet the strict requirements of high-end scenarios such as mid-to-high-end silicone rubber and electronic-grade materials. For a long period, the import dependence of China's high-end terminal and side chain hydrogen-containing silicone oil exceeded 70%. Overseas suppliers not only maintained high pricing for a long time, but also frequently restricted supply by adjusting quotas and extending delivery cycles, bringing great uncertainty to the stable production of downstream industries.
Since 2023, the explosive growth of downstream emerging industries has directly driven the demand expansion of the hydrogen-containing silicone oil market. Industry statistics show that in 2024, the overall market size of hydrogen-containing silicone oil in China reached 38.5 billion yuan, with a total output exceeding 670,000 tons, a year-on-year increase of 12.3%. Among them, terminal and side chain hydrogen-containing silicone oil, as the core category adapting to the two core application fields of silicone rubber and organic silicone surfactants, contributed more than 60% of the incremental demand. From the perspective of downstream demand structure, 45.6% of China's hydrogen-containing silicone oil demand comes from the silicone rubber field, 32.1% comes from the organic silicone surfactant field, and the remaining demand is distributed in segmented scenarios such as coating modification and electronic potting materials. With the rapid rise of emerging tracks such as photovoltaic module encapsulant, new energy vehicle silicone rubber components, and organic silicone additives for pesticides, the demand growth rate for high-activity terminal and side chain hydrogen-containing silicone oil has remained above 20% for three consecutive years. Traditional low-to-medium end products have been completely unable to match the performance requirements of downstream, making technological upgrading at the industrial end extremely urgent.
The core technological breakthroughs of this new generation of production line cover the full chain links from raw material pretreatment to finished product post-treatment. On the raw material side, the new continuous purification process increases the purity of methylhydrogendichlorosilane monomer to 99.95%, controlling the metal ion impurities in the raw material below 50ppb, avoiding the premature deactivation of Si-H bonds caused by impurities from the source. In the polymerization reaction stage, the independently developed continuous gradient polymerization technology realizes precise regulation of the distribution of terminal and side chain active hydrogen, making the uniformity of active sites of products 40% higher than that of the traditional batch process, and the efficiency and consistency of the crosslinking reaction have achieved a qualitative leap. In the post-treatment link, the application of the multi-stage thin film devolatilization system controls the small molecule volatile content of the product below 0.3%, far lower than the industry average of 2% in traditional processes, completely solving the long-standing pain point of high-end downstream silicone rubber products that are prone to precipitate small molecules and have unstable properties at high temperatures. At the same time, the new environmentally friendly solid-supported catalyst system replaces the traditional liquid acid catalyst, reducing the waste acid discharge in the production process by 92% and the energy consumption per unit product by 35%. While greatly improving product quality, it also achieves the industrial upgrading goal of green and low-carbon production.
The most direct value brought by technological upgrading is the performance breakthrough in core downstream application scenarios. In the field of photovoltaic module encapsulant, the addition-cure silicone rubber prepared with the new generation of terminal and side chain hydrogen-containing silicone oil has greatly improved the uniformity of the crosslinking reaction. After curing, the tensile strength of the colloid is increased by 32%, and the yellowing resistance has passed the 3000-hour ultraviolet aging test of the IEC 61730 standard. The long-term power generation efficiency attenuation rate of the encapsulated module is reduced to less than 1%, fully meeting the service life requirement of N-type photovoltaic modules for more than 25 years. Previously, the core raw material of this high-end encapsulant was completely dependent on imports. The implementation of domestic products directly reduces the comprehensive production cost of China's photovoltaic encapsulation industry by 18%, further consolidating the global competitive advantage of China's photovoltaic industry.
In the field of electronic information manufacturing, low-volatility terminal and side chain hydrogen-containing silicone oil has become the core raw material of high-end electronic potting adhesive. The prepared potting material maintains stable insulation performance in the wide temperature range of -60℃ to 200℃, and will not precipitate small molecules to pollute electronic components during long-term service. It has now been batch applied in the packaging links of power semiconductor modules and 5G communication baseband core components, completely solving the long-standing supply chain security problem of high-end potting materials that plagues China's electronic manufacturing industry. In the field of agricultural additives, the organic silicone pesticide auxiliary prepared with high-activity terminal and side chain hydrogen-containing silicone oil can reduce the surface tension of pesticide liquid to below 20mN/m, increase the spreading area of the liquid on plant leaves by 3 times, and improve the effective utilization rate of pesticides by 40%. While reducing the amount of pesticides by 30%, it also improves the control effect of pests and diseases, and has now been widely promoted and applied in major agricultural production areas in China.
With the gradual release of domestic high-end production capacity, the market supply structure of hydrogen-containing silicone oil is undergoing fundamental changes. In the past two years, China's hydrogen-containing silicone oil industry has gradually bid farewell to the extensive low-end capacity expansion model. A large number of small and medium-sized production capacities with substandard environmental protection and backward technical levels have exited in an orderly manner. The industry concentration has continued to increase, and resources are accelerating to gather in leading enterprises with R&D strength. In 2025, the market size of hydrogen-containing silicone oil in China is expected to exceed 450 billion yuan, among which the market share of terminal and side chain hydrogen-containing silicone oil will further increase, and the localization rate of high-end products is expected to exceed 60% by the end of the year. At the global market level, the global hydrogen-containing silicone oil market size is about 500 million US dollars in 2025, and it is expected to grow to 738 million US dollars at a compound annual growth rate of 8.0% from 2025 to 2031. As the world's largest producer and consumer of hydrogen-containing silicone oil, China is gradually upgrading from product export to technology output, occupying a more core position in the global organic silicone industrial chain.
Industry experts point out that the technological breakthrough and capacity implementation of terminal and side chain hydrogen-containing silicone oil is a landmark event for China's organic silicone industry from "growing big" to "growing strong". In the past, China's organic silicone industry long focused on the scale expansion of general-purpose basic products, and was restricted by others in the high-end intermediate field for a long time. The full-process independent control of technology this time not only directly reduces the production cost of dozens of downstream organic silicone new materials, but also opens up the full industrial chain technical barriers from basic monomers to high-end end products, opening up a new space for subsequent innovation of the entire industry. In the future, with the continuous iteration of downstream emerging industries, terminal and side chain hydrogen-containing silicone oil will also achieve application breakthroughs in more cutting-edge scenarios such as flexible electronic substrates and hydrogen energy sealing materials, providing solid material support for the high-quality development of multiple strategically emerging industries in China.
