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Recently, a major industry breakthrough has emerged in China's organosilicon materials sector. The 10,000-ton scale full-process intelligent production line for hyperbranched low-foam polyether modified silicone oil, designed for three core high-end tracks including advanced industrial cleaning, special coatings and agricultural additives, has successfully completed 120 consecutive days of full-load stable operation assessment. After multiple rounds of sampling verification by the National Organosilicon Material Quality Testing Center, the series of products produced by this production line have comprehensively surpassed the current world's top products in three core indicators: dynamic surface tension control, foam suppression durability under extreme temperatures, and compatibility with polar systems. This milestone development completely breaks the 40-year-long technological monopoly held by overseas enterprises in the high-end polyether modified silicone oil sector, and fills a critical gap in the supply chain autonomy of multiple domestic strategic emerging industries.
Polyether modified silicone oil is a type of nonionic organosilicon surfactant synthesized by grafting polyether segments onto the polysiloxane main chain. Thanks to its unique "amphiphilic molecular structure", it not only retains the inherent advantages of organosilicon materials such as low surface tension, high and low temperature resistance, and excellent weatherability, but also gains good compatibility with water, polar organic solvents and resin systems through the introduction of polyether chains. It has become an indispensable "industrial monosodium glutamate" in the modern industrial system. For a long time in the past, most polyether modified silicone oils circulating in the domestic market adopted the traditional linear molecular structure design. While these products can meet basic usage requirements in ordinary civilian scenarios, they have exposed irreparable performance shortcomings in high-end industrial scenarios. In the precision cleaning process of semiconductor wafers, ordinary polyether silicone oil continuously generates a large amount of hard-to-eliminate micro-foam under the dynamic working condition of high-speed spraying, which not only clogs the precision nozzles of cleaning equipment, but also forms residual water marks on the wafer surface, directly affecting the yield of chip manufacturing. In the spraying construction of high-solid content industrial coatings, ordinary products have insufficient leveling performance, which easily leads to defects such as shrinkage cavities and fish eyes on the paint film, making it impossible to meet the ultra-high appearance quality requirements of high-end engineering machinery and new energy vehicle shells. In modern large-scale agricultural aviation plant protection operations, ordinary polyether silicone oil quickly loses its spreading performance under high temperature and drought environments, resulting in an attachment rate of less than 30% for pesticide droplets on crop leaves. This not only causes pesticide waste, but also brings hidden dangers of non-point source pollution to the soil. For decades, the core technology and production capacity of the global high-end polyether modified silicone oil market have been firmly controlled by a small number of leading overseas chemical enterprises. Domestic downstream high-end manufacturing industries have long relied on imports for the high-performance products they need. These imported products not only have a delivery cycle of 3 to 6 months and long-term high prices, but also often face the risk of supply interruption due to fluctuations in the international supply chain, which has seriously restricted the industrial upgrading pace of domestic semiconductors, high-end equipment manufacturing, green agriculture and other fields. Against this industry background, domestic organosilicon scientific research teams have gone through 8 years of technical research, and finally broken through the core technical bottlenecks of hyperbranched molecule precise design and controllable polymerization, realizing the full localization of high-end polyether modified silicone oil.
The most core technological innovation of the hyperbranched low-foam polyether modified silicone oil that has achieved full production this time is that it completely abandons the linear polyether silicone oil molecular design idea that has been used for decades, and innovatively adopts the "multi-branch star hyperbranched" molecular topology. Through the self-developed dynamic regulation system for hydrosilylation reaction, the scientific research team accurately connected multiple polyether side chains with different polymerization degrees and different ethylene oxide/propylene oxide ratios on the polysiloxane main chain, transforming the molecular structure from the traditional "linear long chain" into a three-dimensional structure with multiple active end groups. This brand-new molecular design fundamentally solves the performance pain points of traditional polyether silicone oil. First, the hyperbranched three-dimensional structure greatly weakens the interaction force between molecular chains, allowing the minimum dynamic surface tension of the product to drop to 20.2 mN/m, far lower than the 23 mN/m of traditional linear products. It can penetrate into the tiny gaps of the system in an extremely short time to achieve instant spreading. Second, the special branched structure endows the molecules with "self-defoaming" characteristics. Under extreme working conditions of high-speed shear, high temperature and high pressure, the molecules can quickly migrate to the foam surface, destroy the stability of the foam liquid film, and achieve a near-zero foam state under dynamic working conditions. The foam suppression durability is more than 4 times higher than that of traditional products. Finally, through precise regulation of the proportion of different hydrophilic and lipophilic polyether branches, this series of products can adapt to almost all industrial systems from strong polar aqueous solutions to weak polar oil-based resins, with a compatibility coverage 3 times wider than that of traditional products. In order to realize this high-precision molecular synthesis, the project team also independently built a full-process continuous intelligent production device, completely changing the process route of traditional polyether silicone oil production using batch reactors. This new production system integrates a number of advanced technologies such as microchannel pre-reaction, multi-stage series temperature-controlled reaction, online real-time spectral monitoring, and fully automatic precise batching. The entire production process does not require manual intervention, and the reaction conversion rate has increased from 82% of the traditional process to 99.7%. The molecular structure uniformity of the product has been greatly improved, and the performance deviation between batches is controlled within 0.3%, far lower than the global industry average of 1.2% for similar overseas products. At the same time, the new process route completely avoids the massive use of organic solvents in the traditional production process, reducing energy consumption per unit of product by 42% and three-waste discharge by 87%, fully meeting the industrial development requirements of green chemical industry.
At present, this series of hyperbranched low-foam polyether modified silicone oil has completed full-cycle application verification in dozens of domestic downstream high-end industrial scenarios, showing far better practical application effects than imported products, and bringing considerable economic and social benefits to downstream industries. In the precision cleaning process of 12-inch semiconductor wafers, the cleaning additives formulated with this product produce no obvious micro-foam throughout the whole process under the dynamic working condition of 120MPa high-pressure spraying. The particle removal rate on the wafer surface reaches 99.99%, and the residual amount of surface water marks is reduced to 1/20 of that of traditional imported products. It has been successfully applied to wafer cleaning production lines for 14nm and below processes, completely solving the past "stuck neck" problem of relying on imported cleaning additives. In the field of high-solid content industrial coatings, the water-based polyurethane coating added with this product has its leveling time shortened by 60% during the automatic spraying construction process of new energy vehicle shells, completely eliminating common appearance defects such as shrinkage cavities, fish eyes and pinholes. The surface gloss of the paint film is increased by 8%, and the friction resistance is improved by 30%. It has now been widely used in the coating production lines of multiple leading new energy vehicle enterprises in China, greatly reducing the coating rework rate. In the field of green agricultural aviation plant protection, pesticide droplets added with this polyether silicone oil additive have their spreading area on the leaves of rice, wheat, fruit trees and other crops increased by more than 5 times. Even in a high temperature of 38°C and an arid environment with relative humidity lower than 30%, the droplet attachment rate can still reach more than 92%. The effective utilization rate of pesticides has been increased by 40%, and under the premise of reducing pesticide usage by 25%, it can still guarantee the same pest control effect, providing core material support for the reduction of pesticides, efficiency enhancement and green low-carbon development in agriculture. In addition, this series of products has also realized import substitution applications in many segmented industrial scenarios such as high-precision leveling agents for textiles, high-performance flocculant additives for sewage treatment, and anti-wear additives for special lubricating oils, showing extremely strong scenario adaptability.
With the continuous and stable full-capacity operation of this 10,000-ton intelligent production line, the market supply pattern of domestic high-end polyether modified silicone oil has undergone fundamental changes. In the past, domestic downstream high-end customers needed to place orders half a year in advance for imported high-end polyether modified silicone oil products with a price of more than 80,000 yuan per ton. Now there is a stable domestic alternative source, which not only shortens the delivery cycle to within 72 hours, but also reduces the comprehensive usage cost by more than 40%, greatly lowering the production cost of downstream high-end manufacturing industries and enhancing the international market competitiveness of related industries. Industry experts point out that the full localization of hyperbranched low-foam polyether modified silicone oil is not just a single material technological breakthrough, but a landmark event for the entire domestic organosilicon industry to move towards the high-end direction. It breaks the decades-long technological monopoly of overseas enterprises in the field of high-end organosilicon surfactants, fills the last high-end puzzle of the domestic polyether modified silicone oil industry chain, and makes China one of the few countries in the world that fully masters the independent production technology of the full spectrum of polyether modified silicone oil. In the future, with the sustained and rapid development of downstream strategic emerging industries such as semiconductors, new energy and green agriculture, the market demand for high-end polyether modified silicone oil will continue to maintain a rapid growth rate of more than 18% per year. Relying on the independently controllable 10,000-ton intelligent production capacity, the domestic organosilicon industry will further develop more customized and high value-added special polyether silicone oil products around downstream segmented scenarios. While meeting the needs of the domestic market, it will gradually expand to the global high-end market, promote technological progress and cost reduction of the entire global polyether modified silicone oil industry, and contribute Chinese organosilicon material power to the green and low-carbon transformation of global manufacturing.
