The high-temperature resistance limit of silicone rubber: How much do you know?

From performance to application, revealing the core secrets of high-temperature resistant materials

Silicone rubber, as a commonly used composite material in industrial and household fields, its excellent high-temperature resistance has always been a core advantage, but what is its high-temperature resistance limit? This question is directly related to material selection and application safety. This article will analyze it from three aspects: the nature of performance, application fields, and limit parameters.

This polymer with a siloxane bond (Si-O) as the core structure has a temperature resistance range from -60℃ to 230℃. Special formula silicone rubber can break through the high-temperature resistance limit of 300℃, and can maintain elasticity and wear resistance even under extreme temperatures. Its heat-resistant mechanism comes from the stable siloxane chain structure, which can resist high-temperature oxidation. Low thermal conductivity can reduce heat transfer, and a small expansion coefficient can ensure dimensional stability, making it stand out in many fields.

In the automotive industry, it is used for engine gaskets and cable protective sleeves, which are resistant to high temperatures; seals and insulating materials in the aerospace field need to withstand extreme temperature changes; rice cookers, oven gaskets in household appliances, as well as high-temperature disinfection components of medical devices and protective materials for electronic components, all depend on its heat resistance and safety.

Divided by heat resistance grade, the high-temperature resistance limit of standard silicone rubber is 230℃. High-performance models can reach a heat resistance of more than 300℃ through silicon-fluorine mixing or silicone modification technology. Fire-resistant types can withstand high temperatures in flames for a short time, meeting extreme protection requirements. The flexibility of silicone rubber formulations allows its high-temperature resistance limit to be adjusted as needed, making it an indispensable material solution in many industries.

Understanding the high-temperature resistance limit of silicone rubber is the key to accurate selection. With product upgrades, this material combines heat resistance, low-temperature resistance, chemical stability, and biocompatibility, and its application boundaries will continue to expand, providing reliable support for more high-temperature scenarios.