Ethylene/Acrylic Elastomer for Demanding Automotive Applications

Ethylene/acrylic elastomer (E/A) is a relatively new polymer with more heat resistance than any other commercially available, moderately priced, oil, water and weather-resistant rubber. Typical parts made from E/A elastomer will meet SAE J-200 requirements at 175°C., corresponding to the previously unassigned Type “E” classification. Swelling in ASTM Oil #3, after 70 hours at 150°C., ranges from 80 to 35% (Class E to Class G) as a function of compounding. This paper discusses the unique combination of physical properties and resistance to deteriorating environmental factors which make ethylene/acrylic elastomer especially well suited for demanding automotive applications.