Silicone Heat Resistance Agent: Compatible with Fully Transparent Silicone Rubber Systems, Built to Withstand Extreme High-Temperature Conditions.

Although silicone materials are renowned for their heat resistance, engineers in practical applications have long faced a harsh reality: in oxidative environments above 200°C, side-chain groups tend to undergo gradual oxidation, leading to embrittlement, yellowing, and degradation of mechanical properties in silicone rubber, significantly shortening service life.

Taking IGBT module silicone gels as an example, prolonged high-temperature aging not only reduces electrical insulation performance, but also increases modulus and hardness, causing the gel to lose its stress-buffering capability. While conventional antioxidants can provide limited improvement, they often suffer from poor compatibility and migration risks, making them a symptomatic rather than a fundamental solution. Engineers urgently require a long-term, highly compatible, and stable heat resistance solution for silicone rubber systems.

Traditional heat resistance agents are often solvent-based or solid additives, which tend to volatilize or migrate at high temperatures and exhibit limited compatibility with liquid silicone rubber. In contrast, a lanthanide metal heat resistance agent carried on a polysiloxane backbone is synthesized using a structurally similar polysiloxane carrier. This structural affinity grants it excellent compatibility with silicone rubber, as well as non-migrating and non-bleeding long-term stability.

Its thermal stabilization mechanism is based on the ability of multivalent metal ions to efficiently capture oxidation-generated free radicals and rapidly terminate chain reactions, thereby blocking oxidative degradation pathways at the source. This “metal coordination + siloxane carrier” synergistic structure fundamentally reconstructs the antioxidant system of organosilicon materials, enabling a qualitative leap in both thermal resistance temperature and service lifetime.

Based on its excellent compatibility and thermal stabilization efficiency, the SK-T01/TP01 series of silicone heat resistance agents has demonstrated broad application potential across multiple high-end fields:

• High-temperature phenyl silicone rubber and phenyl silicone resins, used in aerospace sealing systems and specialty cables;

• High-power LED encapsulation silicones and IGBT module gels, ensuring long-term reliability in power electronics;

• High-end thermally conductive and lubricating phenyl silicone oils, improving operational stability under extreme temperature conditions.

In an era where cost-performance optimization is critical, additives often play a decisive role in achieving cost reduction and efficiency improvement. With minimal additive loading, system-wide failure risks can be effectively mitigated, delivering disproportionately large long-term benefits. This concept of a “small additive, long-term protection” may well represent a key strategy for solving a wide range of application challenges.