Elastosil R plus 4350/55
Solid Silicones and High Temperatures
The new solid silicone rubber Elastosil R plus 4350/55 from Wacker Chemie AG, Munich, Germany, is extrudable and addition-curing with high heat resistance. According to the manufacturer, with the right amounts of heat stabilizer, this solid silicone can withstand several days’ exposure to temperatures of up to 300°C without any significant change in its elasticity or mechanical properties. Resistance to short-term temperature peaks of up to 400 °C is even possible. The new solid silicone is therefore suitable for applications in which components are exposed to high temperatures continuously or for long periods. Sealing profiles and hoses for use in e. g. oven doors or under the hood are potential applications. The additional resistance of the silicone rubber to hot steam makes food contact applications possible. The requirements of the German Federal Institute for Risk Assessment (BfR) and the US Food and Drug Administration (FDA) are satisfied through a separate annealing step. In addition, unstabilized basic rubber compounds can be purchased from the portfolio along with various additives and modified in-house.
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