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.
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
Standard Low Temperature: -40°C / -40°F
Standard High Temperature: 100°C / 212°F
Special Compound High Temperature: 135°C / 275°F
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Doesn't Perform Well In...