Inside aerospace engine bays, in battery packs of new energy vehicles, and in the core components of high-temperature industrial equipment, a material is silently enduring the test of extreme temperatures: high-temperature resistant silicone rubber, which can stably withstand temperatures of 300-380℃. This seemingly ordinary elastic material, with its unique molecular structure and excellent properties, has become an indispensable "high-temperature protection guardian" in modern industry.
The superior heat resistance of high-temperature silicone rubber stems from its unique chemical structure. Unlike traditional carbon-based rubbers, its main chain is composed of silicon-oxygen bonds with a bond energy as high as 444 kJ/mol, far exceeding the stability of carbon-carbon bonds. This makes it less prone to chain breakage and oxidative degradation at high temperatures. Through special formulation optimization, the introduction of phenyl groups and other groups into the main chain further enhances the material's thermal stability. Even under short-term high-temperature shocks at 380℃, it can maintain its structural integrity, avoiding failure phenomena such as cracking and hardening.
Beyond its core heat resistance, this silicone rubber also boasts impressive overall performance. It possesses excellent mechanical properties, maintaining outstanding tensile strength and resilience even under high-temperature conditions. After 168 hours of heat aging at 300℃, its tensile strength retention rate remains stable at over 70%, far exceeding the performance level of ordinary silicone rubber. This "heat-resistant and durable" characteristic allows it to operate reliably in dynamic high-temperature environments, resisting failure due to vibration or deformation.
Its flexible processing adaptability is another major advantage, easily adapting to both compression molding and extrusion molding, two mainstream processes. Compression molding can precisely create heat-resistant seals with complex structures, meeting the irregular sealing requirements of equipment such as aero-engines and industrial boilers; extrusion molding can mass-produce heat-resistant extruded tubes, widely used in high-temperature fluid transportation, electronic equipment insulation sleeves, and other scenarios. The compatibility of the two processes allows the material to be customized into diverse product forms according to the needs of different industries.
High-temperature resistant silicone rubber plays an irreplaceable role in numerous industrial sectors. In the aerospace industry, seals and gaskets made from it can withstand the high temperatures and pressures of engine operation, ensuring the stable operation of the power system. In the automotive industry, the use of this material in sealing and heat insulation components around the engine significantly improves the reliability of vehicles under high-temperature conditions. In the electronics and electrical fields, it is indispensable for the insulation components of equipment such as transformers and high-temperature ovens, maintaining excellent electrical insulation properties even under sustained high temperatures to prevent the risk of leakage.
Compared to ordinary silicone rubber (temperature resistance up to 200℃) and fluorosilicone rubber (temperature resistance around 250℃), high-temperature silicone rubber with a temperature range of 300-380℃ fills the material gap for extreme high-temperature scenarios. It not only withstands more stringent temperature challenges but also boasts environmental and safety advantages, as it does not easily release harmful gases at high temperatures, making it suitable for applications with high safety requirements. Furthermore, through fine-tuning the formulation, its chemical corrosion resistance, aging resistance, and other indicators can be further optimized to meet the specific needs of different industries.
From high-temperature equipment in industrial automation to core components of cutting-edge technologies, high-temperature resistant silicone rubber has broken through the limitations imposed on materials by high-temperature environments. Its stable performance proves that under extreme conditions of 300-380℃, it can maintain its core functions of sealing and insulation while also ensuring processing flexibility and service life. It has become a key material support for modern industrial upgrading, providing reliable guarantees for various industries to overcome high-temperature technology bottlenecks.
High Temperature Resistance Silicone Rubber(350℃),pls check
IOTA HTV 329
