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>> Acrylic Elastomers (ACM, AEM Vamac®) 

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There are generally two forms of acrylic-based elastomer available: Polyacrylates (ACM) and ethylene-acrylates (AEM, Vamac®).

Polyacrylates offer good resistance to lubricating oils and high temperatures, and are commonly used where the two are found in combination. ACM elastomers show excellent resistance to engine oils (semi- and fully-synthetic), petroleum based lubricants, transmission fluids, aliphatic hydrocarbons, ozone and ultraviolet radiation.

Ethylene acrylic elastomers (AEM) are terpolymers of ethylene, acrylic and a cure-site monomer, supplied by DuPont™ under the tradename of Vamac®. AEM elastomers exhibit mechanical properties similar to ACM, although they can operate over a wider temperature range than ACM and hydrogenated nitriles (HNBR).

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