AEM - Ethylene Acrylate Rubber

Description
Ethylene Acrylate Rubber (AEM)

Hardness Range
From 40 to 90 Shore A

Nitrosamine Free
Available on request

Transformation System
Injection / Compression / Extrusion / Calendering / Rubber-to-metal bonding

Vulcanization
System based on diamines and accelerators sensitive to carboxylic groups

Field of Application
Automotive / Chemical / Electrical / Industrial / Applications in low and high temperature environments

Main Reference Standards
Standards of major manufacturers / According to specification / ISO 1431 / ASTM D1418

Classification
These special elastomers, introduced by Dupont in 1975, constitute an interesting combination of resistance to high and low temperatures, oils and coolants, inorganic acids and bases, and atmospheric agents.

Polymer type
Ethylene-acrylate elastomers are obtained by copolymerizing ethylene and methyl acrylate with small amounts of monomers containing carboxyl groups, classified as “cure-site”. This particularity allows efficient vulcanization using diamines and other accelerators sensitive to carboxyl groups. These elastomers exhibit good physico-mechanical properties when using standard reinforcing fillers. The ethylene structure provides good low-temperature properties, while methyl acrylate provides oil resistance. The fully saturated structure ensures high resistance to ozone, UV radiation, and atmospheric agents. Grades with higher acrylate content and improved oil resistance are also available.

Applications
The compounds based on ethylene-acrylate elastomers can be used to produce items with hardness ranging from 40 to 90 Shore A.
Formulation adjustments are possible depending on various transformation technologies (molding, extrusion, calendering, rubber/fabric and rubber/metal adhesion) and to meet any specific request or specification requiring the use of this elastomer. The most common technical items find applications in the automotive, chemical, electrical sectors, and wherever good performance is required at both high and low temperatures, in basic and acidic environments, with resistance to ozone and weathering, and good electrical properties.