● Ethylene-acrylate rubber is a polymer of ethylene-methyl acrylate with carboxylic groups.
● AEM rubber has a better heat resistance than ACM.
● It also has a better tear strength, but a worse resistance to mineral oils than ACM.
● AEM as well as ACM is known under the trade name VAMAC ® from Dupont.
● Operating temperature range is about – 40°C to +150°C.
● AEM is available in the hardness ranges 40-90 Shore A.
● AEM elastomers are primarily used where combined resistance to ozone, heat and oils is required.
● They are sometimes a good alternative to more expensive heat resistant elastomers such as fluorocarbon polymers (FKM), silicones (VMQ) and fluorosilicones (FVMQ) for elevated temperature applications (< 150 °C).
● AEMs are not recommended for exposure to aromatic hydrocarbons, gasoline, brake fluids and phosphate esters.
● Typical applications include automotive transmission / power steering seals and O-rings that have to be resistant to transmission fluids and many other common automotive lubricants and hydraulic fluids.
● Other applications include diaphragms, plumbing seals, boots, hoses, vibration mounts, pads, isolators and custom molded rubber goods and parts.