Heat-resistant fluorosilicone extends automotive design options


Addressing material requirements for demanding automotive applications that require long-lasting, reliable performance at temperatures exceeding 220°C, Dow Corning has debuted a series of fluorosilicone rubber (FSRs).

"With automotive design trending toward smaller engine compartments, increased exhaust gas recirculation and decreased air flow, the high-end temperatures in underhood environments are climbing and, more importantly, driving the performance requirements for FSRs to extremes not previously required," said Craig Gross, senior application engineer for Fluorosilicone Elastomers at Dow Corning. "In collaboration with the automotive industry, Dow Corning has developed an innovative new technology platform for its Silastic FSR line that boosts temperature resistance for extended periods of time and offers expanded flexibility for next-generation automotive designs."

FSRs fall into a special class of silicone polymers that add enhanced chemical resistance to the excellent temperature performance typical of silicone technology. These materials withstand long exposure to aggressive automotive fluids, fuels and oils, and conventional grades perform reliably at temperatures reaching 200°C, making them a common material solution for turbocharger hoses, fuel systems and transmission seals. Even with the help of performance-enhancing additives, however, traditional FSR grades are reaching their limits as new automotive designs steadily drive underhood temperatures ever higher.

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