Ethylene Acrylic
ASTM D1418, ISO 1629 Designation: AEM
ASTM D2000, SAE J200 Type/Class: EE, EF, EG, EA
Standard Color: Black
Trade Name:
- Vamac® (DuPont Dow Elastomers)
Relative Cost: Moderate
General Temperature Range: -40° to +300° F
A copolymer of ethylene and methyl acrylate, ethylene acrylic also has a third, acid-containing monomer to cure the polymer chain’s active groups. AEM offers exceptional resistance to ozone, sunlight, and heat, as well as low gas permeability and moderate oil swell resistance. Flex life is good, as are tear, abrasion, and compression set properties.
AEM performs well in:
- Alkalies
- Dilute acids
- Glycols
- Water
- as power steering and automatic transmission seals
AEM does not perform well in:
- Aromatic hydrocarbons (benzene, toluene, xylene)
- Brake fluids
- Gasoline
- Ketones
- Phosphate esters
- Strong acids
