EPDM

Ethylene-propylene rubber was first introduced in the USA in limited commercial quantities in 1961. There are two types: EPM – copolymers of ethylene and propylene.
EPDM – terpolymers of ethylene, propylene and a diene. The EPDMs are manufactured using Ziegler/Natta polymerization in solution or suspension.

EPDM has an excellent resistance to sunlight, ozone and weathering. Furthermore EPDM has an excellent compression set and resistance to acids, bases and some solvents. Important parameters are the ethylene content, termonomer content and Molecular weight.

General properties:

  • Temperature range -60°C up to 120~150°C
  • Good ageing resistance & compression set
  • Good low temperature properties 
  • Good weathering and ozone resistance
  • Low oil resistance (except brake oil)

Helvoet compounds:

  • 40 to 90 shore A
  • Sulphur & Peroxide vulcanization systems

Applications:

  • Sealing technology in personal care appliances
  • Seals for drinking water applications
  • Automotive rubber products, seals and membranes