The research and development of low-viscosity active resins is the core area of technological innovation for solvent-free silicone release agents. Traditional solvent-free products generally have the problem of high viscosity (usually higher than 200 centipoise), which leads to poor coating uniformity and makes it difficult to meet the needs of medium and high-speed coating. In response to this bottleneck, the industry is actively exploring technical paths to reduce viscosity through molecular design. The latest research shows that by precisely controlling the degree of branching and the distribution of active functional groups of silicone resins, the viscosity of the system can be significantly reduced without sacrificing the stability of the release force. For example, some innovative products have achieved a room temperature viscosity of 170-220mPa·s, which is very suitable for high-speed coating applications. This low viscosity property enables the release agent to be evenly coated at lower pressure, reducing atomization and reducing energy consumption. It is worth noting that the reduction in viscosity is not simply achieved through dilution, but is based on an in-depth understanding and precise control of the polymer structure, such as introducing a specific proportion of linear and cyclic siloxane units to balance fluidity and reactivity. This molecular-level innovation has opened up new ways to improve the performance of solvent-free products.


The development of efficient catalytic systems is another key direction to promote the advancement of solvent-free technology. The curing speed directly affects production efficiency and energy consumption, and is an important performance indicator of solvent-free silicone release agents. Traditional platinum catalysts are not active enough under low temperature conditions, resulting in slow curing speed or the need to increase the curing temperature (usually above 190°C), which not only increases energy consumption, but also places higher requirements on the temperature resistance of the substrate. The latest technology significantly improves the catalytic activity by optimizing the ligand structure and synthesizing new platinum complexes to replace the traditional double-capped ligands. Some advanced formulas even achieve rapid curing at 130-150°C, increasing the coating speed to 800-1200 m/min. At the same time, the new catalyst also improves the anti-poisoning performance, reduces the poor curing phenomenon caused by impurities, and improves the process stability. In terms of environmental protection, the innovative catalytic system also focuses on reducing the amount of precious metals, and realizes the recycling and reuse of distillates by optimizing the preparation process, forming a more sustainable closed-loop operation mode of the entire industry chain2.


The expansion of substrate adaptability is an important dimension of technological innovation of solvent-free silicone release agents. The surface properties of different substrates vary significantly, requiring the release agent to have targeted adaptation performance. For paper substrates, the key challenge is to improve the anchoring of silicone oil to the fiber surface to prevent the release force from decreasing or the coating from falling off during use or storage. The latest solution is to establish a rapid evaluation method for the anchoring of the coating to the substrate, and adjust the raw material structure and formula ratio accordingly to achieve stable performance without desiliconization or slight desiliconization within 7 days. For plastic films such as PET, it is necessary to solve the bonding problem caused by low surface energy. Cutting-edge research uses monomers such as methylphenylsiloxane and structured trapezoidal polysilsesquioxane, combined with rare earth solid superacid catalytic polymerization, to develop highly transparent silicone resins with excellent adhesion. For special substrates such as CCK paper (surface coated with clay), the innovative formula overcomes the problem that clay easily destroys silicone by adjusting the polarity and reactivity of silicone oil. This customized solution for different substrates greatly expands the application range of solvent-free products.


The trend of functional design enables solvent-free silicone release agents to meet the increasingly diverse