Precision Polymer Engineering H70B Epichlorohydrin

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Precision Polymer Engineering H70B Epichlorohydrin
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Peroxide Cured, Epichlorohydrin Rubber, 65-75 °IRHD. Terpolymer of epichlorohydrin, ethylene oxide and an unsaturated monomer. ASTM and ISO designation = GECO. Applications: Excellent resistance to petroleum based oils and fuels. Becoming widely used in military and automotive applications where its low and high temperature operating range is superior to that of nitrile. Good resistance to water, acide, ozone and weathering.
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Mechanical Properties	Metric	English	Comments

Hardness, Shore A	70	70	°IRHD; ASTM D1415
	71	71	°IRHD, +1 change after 70 hours @ 140°C; ASTM D1415
Tensile Strength, Yield	10.3 MPa	1490 psi	ASTM D412
	10.918 MPa	1583.5 psi	6% change after 70 hours @ 140°C; ASTM D412
Elongation at Break	281.6 %	281.6 %	-12% change after 70 hours @ 140°C; ASTM D412
	320 %	320 %	ASTM D412
Compression Set	20 % @Temperature 100 °C, Time 86400 sec	20 % @Temperature 212 °F, Time 24.0 hour	ASTM D395

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	150 °C	302 °F
Minimum Service Temperature, Air	-55.0 °C	-67.0 °F	Non-brittle after 3 minutes
	-50.0 °C	-58.0 °F
Flash Point	>= 250 °C	>= 482 °F

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