Flame-retardant modified plastics are widely used in rail transportation, home appliance casings, new energy battery casings, and building plastic components. The safety standards are becoming increasingly stringent. In the flame-retardant formulation system, a large amount of bromine-based, phosphorus-based flame retardants, and inorganic flame retardant powders can easily cause poor resin fluidity, increased extrusion torque, and the appearance of spots and white patches on the product surface. At the same time, the uneven dispersion of the flame retardant powders directly affects the stability of the material's flame retardant grade. Silica-modified silica oil, as a multifunctional processing aid, effectively improves the processing performance of flame-retardant plastics and simultaneously enhances the flame retardant effect, becoming an important component of high-end flame-retardant plastic formulations.
Inorganic flame retardant powders such as aluminum hydroxide and magnesium hydroxide have a high filling content, and the powders are prone to agglomeration, significantly increasing the melt viscosity, causing extrusion difficulties. After adding silica-modified silica oil, it can coat the flame retardant powder particles, reduce the interfacial tension of the powder, break the agglomeration structure, and promote the uniform dispersion of the powder in the resin, effectively reducing the white spots and particle defects on the product surface. At the same time, the silicon oil plays an internal lubrication role, reducing the friction force between melt molecules, improving the flowability of the flame-retardant plastic, reducing the extrusion processing torque, and reducing the equipment load. It avoids unstable discharge and breakage of the pellet during high-filling systems, enhancing the stability of the modified pellet production line.
During the combustion process, the organic silicon components can migrate to the surface of the material, forming a dense silicon-carbon barrier layer, blocking the transfer of oxygen and heat, inhibiting the release of flammable gases, and forming a synergistic flame-retardant effect with phosphorus-based and inorganic flame retardant systems. Without additional filling of flame retardants, it helps the material achieve the desired flame-retardant grade stably. At the same time, the silicon-carbon layer can reduce the generation of molten droplets during combustion, lower the risk of flame spread, and meet the strict flame-retardant requirements of rail transportation and new energy plastic parts.
Many flame-retardant plastics need to be used under long-term high-temperature conditions. Ordinary additives have insufficient heat resistance and decompose and volatilize during processing, generating odors and bubbles. Silica-modified silica oil has excellent thermal stability, is suitable for processing at temperatures ranging from 220 to 280 degrees Celsius, does not decompose, and does not form bubbles or pinholes in the product. For transparent flame-retardant plastics, a high transparency and low haze model can be selected to maximize the retention of the base material's transparency. The production end needs to strictly screen low-free small molecule silica oil to avoid the accumulation of small molecules during high-temperature processing, causing carbon deposition in the mold.
IOTA flame-retardant plastic-specific silica-modified silica oil is compatible with various flame-retardant systems such as PP, ABS, PC, and PA, and can meet the requirements of halogen-free and bromine-based flame retardants in different formulations. The rapid development of new energy, rail transportation, and energy storage industries has driven the continuous expansion of the demand for flame-retardant modified plastics, and the market has continuously raised requirements for material processing stability, long-term flame retardancy, and low-smoke environmental protection. The market space for silica-modified silica oil with multiple functions of dispersion, lubrication, and synergistic flame retardancy is continuously expanding, helping domestic flame-retardant plastic enterprises to create higher-performance and more stable modified plastic products.