China's self-developed methyl vinyl phenyl silicone rubber has achieved a breakthrough in extreme environment materials. By introducing phenyl linkages into the polysiloxane backbone, its temperature resistance, radiation resistance, and ablation resistance have been significantly enhanced. Low-phenyl types (-100℃ to 150℃) remain flexible at ultra-low temperatures, medium-phenyl types are self-extinguishing, and high-phenyl types withstand 2.58×10⁴C/kg gamma radiation, with short-term operating temperatures exceeding 400℃.

In aerospace, it is used in rocket engine insulation, satellite seals, and nuclear radiation coatings. A spacecraft using this material operated in space for 3 years without degradation, far exceeding the 6-month lifespan of traditional materials. Its ozone and thermal cycling resistance also make it ideal for deep-sea exploration seals.

Through precise phenyl content control (5%-50%), performance customization has been realized. For example, SE5563U, after DBPH vulcanization, shows a 40% increase in tear strength, used in Antarctic research station seals.

Domestic production capacity now exceeds 5,000 tons annually, with demand growing at 15% yearly in 5G, new energy vehicles, and other high-end manufacturing sectors.

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