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Among the products celebrating their premieres are SEMICOSIL? 915 HT, a heat-resistant gel for encapsulating power electronic modules; LUMISIL? 868 S, an encapsulant for LED chips that prevents sedimentation of luminescent dyes; and LUMISIL? 885, a silicone rubber for producing optical lenses. Further product highlights are SILPURAN? 2410 silicone rubber for orthopedic applications, and SILPURAN? 6610/40 liquid silicone rubber for radiation-sterilizable valves used in medical technology.
WACKER’s successful SEMICOSIL? silicones have served as electronics encapsulants for many years. SEMICOSIL? 915 HT, which is premiering in Tokyo, is a silicone gel that is characterized by extreme heat resistance after curing. This is evidenced by the fact that the mechanical properties of the cured rubber remains stable even after 2,000 hours’ exposure to 210 degrees Celsius. The gel is therefore ideal for encapsulating power electronic modules. When regulating high electrical power, these modules can become so hot that conventional silicone gels fail.
The new gel is a two-component, addition-curing product. It is typically used to encapsulate power electronic modules employed in energy technology, high-speed trains and industrial plant. SEMICOSIL? 915 HT acts as a safeguard for manufacturers of power electronic modules against more exacting demands that will arise in the future, because the extremely heat-resistant encapsulant has the capacity to cope with much higher power densities than before.
The LUMISIL? 868 S is a transparent specialty silicone for encapsulating light emitting diodes (LED). This two-component, addition-curing product, which has a pot-life of 24 hours after the components have been mixed, prevents luminescent dyes from settling in the liquid encapsulant. The material adheres to conventional reflector substrates, without their having to be pretreated. The encapsulant can be applied by either dispensing or jet methods.