In modern industry and life, many scenes are faced with the challenge of high temperature, from the high temperature operation of automobile engines to the continuous heating of industrial equipment. Ordinary materials are often vulnerable to high temperatures. However, high temperature resistant silicone rubber, with its unique properties, has become a reliable "guardian" in high temperature environments. So, what exactly is this magical material? And why can it stand firm in high temperatures?



High temperature resistant silicone rubber is essentially an elastomeric material with silicon-oxygen bonds (Si-O) as its main structure. Unlike traditional rubber with carbon-carbon bonds (C-C) as its skeleton, silicon-oxygen bonds have higher bond energy, which makes silicone rubber inherently excellent in heat resistance. Generally speaking, ordinary rubber will begin to soften and its performance will decline at around 100°C, while high temperature resistant silicone rubber can maintain stable physical and chemical properties for a long time in a temperature environment of 200°C or even higher, without deformation, aging or loss of elasticity.

Excellent heat resistance is the most prominent label of high temperature resistant silicone rubber. This characteristic stems from its unique molecular structure. The stability of the silicon-oxygen bond makes silicone rubber less likely to break and degrade its molecular chain at high temperatures, and can maintain the integrity of the material. At the same time, a dense silicon dioxide protective film will form on the surface of silicone rubber at high temperatures, further preventing the intrusion of heat and the occurrence of oxidation reactions, just like putting on a layer of "fireproof armor" for the material. This strong heat resistance allows it to shine in application areas such as heat-resistant seals and heat-resistant extruded tubes.

In the field of heat-resistant seals, high-temperature silicone rubber has performed exceptionally well. Whether it is the sealing gasket of an automobile engine or the sealing components of an industrial boiler or pipeline, they all need to maintain sealing performance for a long time in an environment of high temperature, high pressure, and possible chemical corrosion. Once the seal fails, it will not only cause medium leakage, energy waste and environmental pollution, but may also cause safety accidents. With good elasticity and stable physical properties, high-temperature silicone rubber can fit tightly to the sealing surface, and can always maintain the sealing effect even in the case of drastic temperature changes, thus ensuring the safe operation of the equipment.
Heat-resistant extruded pipes are also inseparable from the blessing of high-temperature silicone rubber.

In addition to excellent heat resistance, high temperature resistant silicone rubber also has good mechanical properties. It has high tensile strength and tear strength, and is not easily damaged even if pulled or squeezed by external forces. This feature enables it to maintain structural integrity in complex working environments. At the same time, silicone rubber has strong elastic recovery ability and can quickly return to its original state after repeated compression or stretching, greatly extending its service life. For example, in high temperature and high pressure hydraulic systems, silicone rubber seals can withstand frequent pressure changes and always maintain good sealing and buffering effects.

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