With the rapid development of the electric vehicle (EV) industry, battery pack safety and reliability have become key bottlenecks. Batteries generate significant heat during rapid charging and high-power discharge, placing comprehensive demands on packaging and sealing materials for high-temperature resistance, chemical resistance, and cyclic fatigue resistance. Methylphenyl vinyl silicone rubber (MPVS), with its unique molecular design and excellent physical and chemical properties, is becoming an indispensable sealing elastomer in next-generation EV battery thermal management systems.



MPVS incorporates both heat-stabilizing phenyl groups and highly reactive vinyl end groups into its molecular chain, enabling it to maintain long-term elasticity and structural stability over a temperature range of -60°C to +280°C. Compared to traditional methyl silicone rubber, MPVS exhibits significantly lower volume change and compression set at high temperatures, allowing it to withstand tens of thousands of thermal cycles without cracking or leaking.

In practical applications, MPVS is often used in key areas such as battery pack molded seals, heat exchanger interface gaskets, and cooling pipe rubber components. Its excellent chemical resistance protects against corrosion from electrolytes, coolants, and hot and humid environments. Its superior electrical insulation strength and dielectric constant provide secondary protection around high-voltage control cabinets

To adapt to large-scale automated production, MPVS has optimized its Mooney viscosity and curing system, making it compatible with injection molding, extrusion, and compression molding processes, shortening curing time and improving production efficiency. Furthermore, the phenyl content and cross-link density can be adjusted to meet customer needs, enabling customized formulations ranging from soft sealing to high-strength support.

With rising demands for electric vehicle range and safety, the market for MPVS in power battery thermal management systems continues to expand. In the future, this high-performance silicone rubber elastomer is expected to be further applied in areas such as hydrogen fuel cell stack packaging, high-voltage sealing for smart grids, and new rail transit power systems, bringing new breakthroughs in thermal and electrical sealing technologies across multiple industries.

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