Polymers & Resins
REACH
Ethylene propylene diene terpolymer
CAS Number
25038-36-2
EC Number
607-505-0
What is Ethylene propylene diene terpolymer?
Ethylene propylene diene terpolymer (CAS 25038-36-2), commonly known as EPDM, is a synthetic elastomer produced from ethylene, propylene, and a diene monomer.
Where is Ethylene propylene diene terpolymer used?
- Rubber compounding, sealing, and insulation
- Automotive: door seals, window gaskets, and under-hood hoses
- Roofing: waterproofing layer for flat and low-slope commercial systems
- Wire and cable: insulating jacket material in medium-voltage applications requiring flexibility at low temperatures
- Polymer blending: impact modifier and rheology modifier
- In polypropylene compounds it improves toughness in injection-molded automotive and appliance components.
Commercial specifications
- Grades differentiated by ethylene content, ENB (5-ethylidene-2-norbornene) or DCPD diene type, and oil-extended versus non-extended formulations
- Peroxide-curable and sulfur-curable grades
- Mooney viscosity grade and diene content
Other Names (Synonyms)
Ethene-ethylidenenorbornene-propene copolymer|5-Ethylidene-2-norbornene-ethylene-propylene terpolymer|Bicyclo[2.2.1]hept-2-ene, 5-ethylidene-, polymer with ethene and 1-propene|2-Norbornene, 5-ethylidene-, polymer with ethylene and propene|Ethylene, polymer with 5-ethylidene-2-norbornene and propene|Propene, polymer with ethylene and 5-ethylidene-2-norbornene|1-Propene, polymer with ethene and 5-ethylidenebicyclo[2.2.1]hept-2-ene|Ethylene Propylene Diene Terpolymer (EPDM)
What are the physical properties of Ethylene propylene diene terpolymer?
Melting Point 158 °C
Density 0.86 g/cm³
Appearance amber slab
Form solid
Which trade and regulatory codes apply to Ethylene propylene diene terpolymer?
Storage Class 11 - Combustible Solids
WGK (Germany) 3