AEM - Acrylic Ethylene Copolymer

Clwyd referenceAEM
ASTM classificationAEM

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). However, AEMs are not recommended for exposure to aromatic hydrocarbons, gasoline, brake fluids and phosphate esters.

Typical applications

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.

The typical continuous operating temperature range is -30°C to 150°C (up to 175°C for limited periods of time).

Advantages
  • Excellent resistance to petroleum fuel and oil
  • Good heat resistance
  • Good ozone resistance
  • Resists flex cracking
Disadvantages
  • Moderate water resistance
Available hardness range (Shore A)45 - 90
Upper continuous service temp.175°C
Min. temp. for sealing applications-40°C
Minimum non-brittle  temp. -60°C
Tensile strength (up to)20 MPa
Elongation at break (up to)350%
Price BracketLow
ASTM 1 OilExcellent
ASTM 2 OilExcellent
ASTM 3 OilExcellent
KeroseneExcellent
Liquid BNone
Liquid 101None
Phosphate esterNone
KetoneNone
TolueneNone
Iso-octaneNone
MethanolNone
Acid (weak)Good
Acid (strong)None
Base (weak)None
Base (strong)None
Hydrogen sulphideNone
SteamNone
OzoneExcellent
RadiationGood
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