Engineering rubbers.

Therban (HNBR) and Levapren (EVM) are said to be high-performance engineering materials with applications in drive belts, safety cabling and fuel hose systems. Therban is said to provide users with a unique range of properties, including excellent ozone and weathering resistance, together with improved resistance to additives in oils, fats and diesel fuels compared to NBR, according to the company. Therban is also said to demonstrate hot air aging resistance up to at least 150[degrees]C, even when subjected to dynamic pressure and abrasive conditions. Like HNBR, Levapren (EVM) is said to be ozone and weathering resistant, exhibits a very good level of oil resistance and can be used up to a temperature of 175 [degrees]C due to its fully saturated polymer chain. The conditions under which the hoses in a car have to function are said to be intensifying. New uses for Levapren, a low-cost, ethylene vinyl acetate rubber, can therefore be found under the hood of the car in gaskets, dampers and hoses. Halogen-free Levapren is said to be used in the outer jacket for the fuel hoses in Audi turbocharger engines, withstanding temperatures of 150-160 [degrees]C. (Lanxess)

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