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ASTM
D 1418 Designations: CO, ECO, GECO
ASTM
D 2000, SAE J200 Type / Class: CH
STANDARD
COLOR: Black
TRADE
NAME:
• Hydrin® (Zeon Chemicals, L.P.)
RELATIVE
COST: Medium
GENERAL
TEMPERATURE RANGE: -55° to +275° F
Epichlorohydrin
is an oil
resistant compound available
in three formulations: as a homopolymer (CO), as
a copolymer of
epichlorohydrin and ethylene oxide (ECO, see Figure
35), and as a terpolymer of
epichlorohydrin, ethylene oxide, and a cure site monomer (GECO).
Epichlorohydrin
combines low gas and solvent permeability with
high resistance to hydrocarbon oils
and fuels. Epichlorohydrin is very resistant to weathering and ozone due
to complete saturation within
the polymer chain.
Epichlorohydrin
also remains stable during low to high temperature
cycling. Because it exhibits less sub-zero stiffness,
epichlorohydrin is often used in place of nitrile and chloroprene
(Neoprene®) for applications requiring resistance
to low temperatures. Epichlorohydrin has only
fair compression
set resistance at high temperatures (i.e. 250° to
275° F).
EPICHLOROHYDRIN
PERFORMS WELL IN:
• Aliphatic
hydrocarbons
• Mineral oil & grease
• Silicone oil & grease
• Ozone
EPICHLOROHYDRIN
DOES NOT
PERFORM WELL IN:
• Aldehydes
• Brake fluids
• Esters
• Hydrocarbons
(chlorinated, nitro)
• Ketones
• Peroxides
MATERIAL
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