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Common Name Hydrin
ASTM D-2000 Classification CH, DK, DJ
Military (MIL STD 417) SB
Chemical Definition Epichlorohydrin
General Characteristics
Durometer Range (Shore A) 40 - 90
Tensile Range (P.S.I.) 500 - 2500
Elongation (Max. %) 350
Compression Set Good
Resilience - Rebound Good
Abrasion Resistance Good
Tear Resistance Good
Solvent Resistance Good
Oil Resistance Excellent
Low Temperature Usage (F°) -15° to -50°
High Temperature Usage (F°) to 225°
Aging Weather - Sunlight Good
Adhesion to Metal Good
Epichlorohydrin is an outstanding polymer, exhibiting most of the better qualities of nitrile and neoprene, but having additional plus features: oil and solvent resistance is very good. Hydrin has especially low swell in gasoline; low temperature performance is better than either nitrile or neoprene, and offers much less torsional stiffness at sub zero temperatures; high temperature endurance is good up to 250°F.; resilience is good and compression set is fairly good in many compounds; abrasion is equivalent to the nitriles; and ozone weathering and water resistance are very good.
Epichlorohydrin is generally attacked by ketones, esters, aldehydes, chlorinated and nitro hydrocarbons.