Epichlorohydrin (CO, ECO, GECO)

Hydrin® is the trade name of epichlorohydrin elastomers made by Zeon Chemicals. epichlorohydrin elastomers are available as a homopolymer(CO), copolymer(ECO,GCO),
and terpolmer(GECO). All epichlorohydrin rubbers offer low temperature flexibilities; resistance to oils, fuel and common solvents; higher temperature resistance than NBR; good weather ability and good dynamic properties.

Cure system - Sulfur-Cured vs. Peroxide-Cured

ECO are usually Peroxide-cured for standard compounds of Ge Mao. It also can be Sulfur-cured to improve flexible property in dynamic system but will reduce the heat resistance and cause poorer compression set.

Other Common Variations

The typical applications of epichlorohydrin are fuels or LPG system in automotive.

General Information

ASTM D 1418 Designation: CO, ECO, GECO
ISO/DIN 1629 Designation: CO, ECO, GECO
ASTM D2000 / SAE J 200 Codes: CH
Standard Color(s): Black
Hardness Range: 50o 80 Shore A
Relative Cost: Medium

Service Temperatures

Standard Low Temperature: -40°C / -40°F
Standard High Temperature: 100°C / 212°F
Special Compound High Temperature: 135°C / 275°F

Performs Well In...

Doesn't Perform Well In...

  • Mineral oil and grease
  • LPG, fuels
  • Silicone oil and grease
  • Ozone, weather
  • Ketones and esters
  • Aromatic and chlorinated hydrocarbon
  • Brake fluids
  • aldehydes