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Wacker A.G., the Munich-based chemical company, has unveiled heat-conducting silicone-based gap filler material for the electronics industry. Called Semicosil 961 TC, the silicone rubber is ideal as an interface material for thermally connecting electronic circuits, Wacker said, ensuring effective heat management.
Wacker said the product is characterized by good flow and processing properties, and wear of the mixing and metering equipment used in its application is low. The heat-conducting Semicosil 961 TC silicone filler is applied directly to the heat sink, the company said, and once the electrical circuit is pressed on, the gap filler cures to form a soft silicone layer that transfers heat to the heat sink.
Wacker said the product, a highly filled, two-part silicone rubber, cures at room temperature via a platinum-catalyzed addition reaction to form a soft silicone elastomer with a tacky surface. The cured rubber achieves a thermal conductivity of two watts per meter kelvin and, at the same time, is electrically insulating, according to the firm.