New DuPont elastomers suit hotter, more aggressive auto underbonnet environments

ERJ staff report (BC)

Düsseldorf, Germany – DuPont Performance Polymers (DPP) has responded to calls from the automotive industry for hose and sealing elastomers that can withstand increasingly hot and chemically aggressive engine environments – the result of trends in engine downsizing and turbocharging to reduce carbon dioxide emissions and fuel consumption.

At K 2013, the company has introduced DuPont Vamac Ultra HT-OR, claimed to “bring new levels of temperature and oil resistance to AEM” (ethylene acrylate rubber), Vamac Ultra LS, a high-viscosity, low fluid swell, fast curing terpolymer AEM, and bisphenol-curable Viton FKM (fluorocarbon rubber) for “outstanding” resistance to acids found in exhaust gas and blow-by gas condensates.

Patrick Cazuc, DPP’s automotive director for Europe, the Middle East and Africa, said: “The new Vamac grades push the performance envelope of the Vamac AEM elastomer portfolio still further, and complement an already versatile set of offerings.

“Acid-resistant Viton FKM will provide the industry with an economic and much needed bisphenol alternative to peroxide-cured FKM, offering protection against the acid gases and condensates generated by modern engines.”

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News release from DuPont with full technical details