MATERIALS: Fluorosilicone Rubber Compounds With Higher Heat Resistance

Dow Corning's new Silastic FSR elastomer technology is aimed at extreme high-temperature automotive applications.

What is said to be a significant new enhancement to its Silastic Fluorosilicone Rubber (FRS) portfolio was recently unveiled at the Detroit SAE 2015 Work Congress by Dow Corning, Midland, Mich. By combining its expertise in formulating, mixing and compounding with its ability to fine-tune polymer, the company has developed a more heat-resistant Silastic FSR technology for extreme high-temperature applications.

            FSR elastomers withstand long exposure to aggressive fluids, fuels and oils, and conventional grades perform reliably at temperature reaching 200 C (392 F). However, even with the addition of performance-enhancing additives, traditional FSR grades are reaching their limits as new automotive design—smaller engine compartments, increased exhaust gas recirculation, and decreased air flow—steadily drive underhood temperatures even higher.

            The new FSR technology platform boasts delivery of reliable, long-lasting performance at higher temperatures. Dow Corning validated these performance improvements by subjecting its enhanced FSR technology to long-term aging, fluid exposure and elevated mechanical and adhesion to HCR (high-consistency rubber). The tests confirmed that the company’s advanced FSR technology delivers reliable performance at temperatures above 220 C (428 F) for extended periods of time. 

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