About Ethylene Acrylic Elastomer
Ethylene Acrylic Elastomer is a specialty synthetic rubber made from ethylene and acrylic ester monomers, commonly methyl acrylate. Commercial AEM grades may also contain a small amount of cure-site monomer to support vulcanization. The material offers good resistance to heat, ozone, weathering, oils, lubricants, and several automotive fluids. It also provides useful low-temperature flexibility and good long-term sealing performance. Ethylene Acrylic Elastomer is mainly used in applications that require balanced heat resistance, oil resistance, and durability.
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Production Process
Ethylene Acrylic Elastomer Production by High-Pressure Free-Radical Copolymerization : Ethylene Acrylic Elastomer is produced by copolymerizing ethylene with methyl acrylate or other acrylic ester monomers. In many commercial grades, a small quantity of cure-site monomer is added to allow amine or peroxide curing. The polymerization is generally carried out under high pressure in an autoclave or tubular reactor using a free-radical initiator. After polymerization, the elastomer is recovered, stabilized, pelletized or baled, and then compounded with fillers, plasticizers, antioxidants, curing agents, and processing aids.
Industrial Uses
Ethylene Acrylic Elastomer is used in automotive seals, gaskets, turbocharger hoses, oil cooler hoses, air ducts, boots, cable jackets, wire insulation, engine components, transmission-fluid seals, O-rings, molded rubber parts, vibration-control parts, industrial hoses, diaphragms, and sealing components used in high-temperature and oil-exposed environments.