Monday, March 3, 2014

EPDM Rubber

EPDM rubber (ethylene propylene diene monomer (M-class) rubber) is a type of synthetic rubber. It is an elastomer which is characterized by a wide range of applications. The M refers to its classification in ASTM standard D-1418; the M class includes rubbers having a saturated chain of the polymethylene type.


The main properties of EPDM are its outstanding heat, ozone and weather resistance. The resistance to polar substances and steam are also good. It has excellent electrical insulating properties. It has good resistance to ketones, ordinary diluted acids and alkalines.

EPDM is used in glass-run channels, radiators, garden and appliance hose, tubing, pond liners, washers, belts, electrical insulation, vibrators, O-rings, solar panel heat collectors and speaker cone surrounds. ( I came across reference to this material in a value engineering project related to radiators in Ashok Leyland vehicles)

 Dienes currently used in the manufacture of EPDM rubbers are dicyclopentadiene (DCPD), ethylidene norbornene (ENB), and vinyl norbornene (VNB). EPDM rubber is closely related to ethylene propylene rubber (ethylene propylene rubber is a copolymer of ethylene and propylene whereas EPDM rubber is a terpolymer of ethylene, propylene and a diene-component).

EPDM O'rings
http://o-ring.info/en/products/by-compound/epdm/

http://en.wikipedia.org/wiki/EPDM_rubber

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