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Comparative Properties of Typical Commercial Elastomers
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CHEMICAL NAME
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Polychloroprene
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Chlorinated Ployethylene
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Polyester/Ether Urethane
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Ethylene Propylene
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Chlorosulphanated Polyethylene
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Polyalkylene Oxide
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COMMON NAME
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Neoprene
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CPE
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Urethane
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EPDM
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Hypalon®
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Epichlorohydrin
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Material Designation
(ASTM D 2000, SAE J 200 Classification) |
BC, BE
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BC, BE, CE
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BG
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CA
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CE
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CH
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Tensile Strength, Mpa
(psi) |
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Pure Gum
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Over 20.7 (3,000)
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Over 10.3 (1,500)
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Over 27.6 (4,000)
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Below 6.9 (1,000)
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Over 17.2 (2,500)
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Below 6.9 (1,000)
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Black Loaded Stocks
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Over 20.7 (3,000)
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Over 17.2 (2,500)
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–
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Over 20.7 (3,000)
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Over 20.7 (3,000)
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Over 17.2 (2,500)
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Hardness Range
(Durom, A) |
40-95
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60-90
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60-99+A (up to 80D)
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40-90
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40-95
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40-90
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Specific Gravity
(Base Material) |
1.23
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1.16-1.32
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1.06
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0.86
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1.12-1.28
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1.36-1.27
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Adhesion to Metals
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Excellent
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Fair to Good
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Good to Excellent
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Good to Excellent
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Excellent
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Fair to Good
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Adhesion to Fabrics
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Excellent
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Fair
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Very Good to Excellent
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Good
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Good
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Fair to Good
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Tear Resistance
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Good
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Fair
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Excellent
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Fair to Good
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Fair
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Fair to Good
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Abrasion Resistance
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Excellent
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Good
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Outstanding
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Good to Excellent
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Excellent
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Fair to Good
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Compression Set
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Fair to Good
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Good
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Fair
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Good
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Fair
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Poor
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Rebound
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Cold
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Very Good
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Fair
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Good (Poor at Low-Temp)
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Very Good
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Fair to Good
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Good
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Hot
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Very Good
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Good
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Good at Room Temp.
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Very Good
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Good
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Good
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Dielectric Strength
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Good
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Excellent
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Excellent
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Excellent
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Very Good to Excellent
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Good
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Electrical Insulation
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Fair to Good
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Good
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Fair to Good
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Excellent
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Good
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Good
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Permeability to Gases
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Low
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Very Low
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Failry Low
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Failry Low
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Low to Very Low
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Low to Fairly Low
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Acid Resistance
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Diluted
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Excellent
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Excellent
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Fair
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Excellent
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Excellent
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Fair to Good
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Concentrated
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Good
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Good
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Poor
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Excellent
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Very Good to Excellent
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Fair
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Solvent Resistance
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Aliphatic Hydrocarbons
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Fair to Good
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Good
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Good to Excellend
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Poor
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Fair to Good
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Excellent
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Aromatic Hydrocarbons
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Fair
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Fair
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Fair to Good
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Poor
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Fair
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Good
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Oxygenated (Keytones, etc.)
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Poor
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Fair
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Poor
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Good to Very Good
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Poor to Fair
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Poor
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Laquer Solvents
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Poor
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Fair
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Poor
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Poor to Fair
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Poor
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Fair
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Resistance to
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Swelling in Lubricating Oil
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Good
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Good
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Good to Excellend
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Poor
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Good to Excellent
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Excellent
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Oil & Gasoline
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Good
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Good
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Good to Excellend
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Poor
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Good
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Excellent
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Animal & Vegetable Oils
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Good
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Good
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Good to Excellend
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Good
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Good
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Excellent
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Water Absorption
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Good
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Very Good
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Good at Room Temp/Poor at 100°C (212°F)
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Very Good to Excellent
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Very Good
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Good
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Oxidation
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Very Good to Excellent
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Excellent
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Excellent
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Excellent
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Excellent
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Good
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Ozone
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Very Good to Excellent
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Excellent
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Excellent
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Outstanding
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Outstanding
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Excellent
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Sunlight Aging
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Very Good
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Outstanding
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Good
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Outstanding
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Outstanding
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Good
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Heat Aging
(Upper Limit Cont. Service) |
95°C (203°F)
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120°C (248°F)
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85°C (185°F)
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145°C (293°F)
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135°C (275°F)
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135°C (275°F)
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Flame
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Good
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Good
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Fair (Will Melt)
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Poor
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Good
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Poor to Fair
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Heat
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Very Good
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Good
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Good
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Excellent
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Excellent
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Very Good
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Cold
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Good
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Very Good
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Excellent
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Excellent
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Good
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Good to Very Good
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