Alfa EPDM

alfa solare logo epdm

Description

PREPONDERANT CHEMICAL STRUCTURE
Unconjugated ethylene/propylene/diene terpolymer (propylene content approx. 20% to 55%, unsaturation approx. 2 ÷ 10%).

 

GENERAL PROPERTIES

Specific weight of raw elastomer: 0.85 ÷ 0.87
Specific weight of derived compounds: 1.02 ÷ 1.40
Shore A or IRHD hardness obtainable: 25 ÷ 90
Minimum service temperature: -20° C ÷ -35° C* (- 45° C) **
Maximum service temperature: +130° C (+150° C) **

 

FUNDAMENTAL PHYSICAL-MECHANICAL CHARACTERISTICS

  • Good to excellent mechanical properties *
  • Fair to excellent resistance to permanent deformation * **
  • Fair to good abrasion resistance

Other properties

  • Virtually zero flame resistance
  • Fair air and gas impermeability
  • Excellent dielectric properties **
  • Outstanding resistance to UV radiation
  • Excellent colorability

 

CHEMICAL BEHAVIOR

More than satisfactory with:

  • water and steam up to 130°C (150°C) **
  • seawater, salt solutions
  • strong mineral bases and their solutions, dilute acids
  • glycols and brake fluids derived from them
  • alcohols, ketones and other oxygenated solvents
  • ozone and atmospheric agents

 

Satisfactory with:

  • strong mineral acids and their solutions
  • vegetable or animal oils and fats
  • phosphate ester-based hydraulic fluid

 

Completely unsatisfactory in the presence of:

  • mineral oils and fats (except with formulations based on ultra-high molecular weight EPDM-OE oil-extended terpolymer)
  • aliphatic, aromatic and chlorinated hydrocarbons
  • silicone ester-based hydraulic fluids
  • non-polar liquids in general

 

PECULIARITY

Absolute resistance to oxidation, weathering, ultraviolet radiation, ozone, even at high temperatures.

* depending on the types
** with specific optimal formulation