SH Rubber - Quality Compression Molding and Extrusion

Ethylene-Propylene, or EP, is available in several polymer variations, all of which exhibit excellent resistance to polar fluids such as water, phosohate esters and ketones. It is not resistant to petroleum oils and solvents. It possesses excellent resistence to heat degradation, compression set, low temperatures, sunlight, ozone and weathering. In many (but not all) applications it can be substituted for butyl rubber. It is superior to butyl with regard to compression set and resilience, but is more permeable to high pressure gas.

Sample compound information: 3-5601-70 / 3-5607-80

General Information for Ethylene-Propylene Rubber

Compound Series:	3-5600 to 3-5799
Temperature Range (F):	-65° to +300°
General Properties:	Good heat resistance. Resistent to sunlight and weathering. Poor resistence to petroleum oils and fuels.
Most Common Applications:	Commercial aircraft hydraulic seals (Skydrol) Automotive brake system seals Sports equipment Radiator hoses Drive belts

Relative Properties of Ethylene-Propylene Rubber

Tensile Strength (psi) -Pure Gum: -Compounded Stocks:	Over 1500 Over 1500
Hardness Range: (Shore Durometer A)	40 - 90
Specific Gravity: (Base Material)	.85
Vulcanizing Properties:	Good
Adhesion to Metals:	Fair
Adhesion to Fabrics:	Fair
Tear Resistance:	Good
Abrasion Resistance:	Good
Compression Set:	Very Good
Rebound -Cold: -Hot:	Fair Good
Dielectric Strength:	Good
Electrical Insulation:	Good
Permeability to Gases:	Medium
Temperature Range in Air (F):	-65° to +300°
Acid Resistance -Dilute: -Concentrated:	Very Good Good
Caustic Resistance:	Good
Solvent Resistance -Aliphatic Hydrocarbons: -Aromatic Hydrocarbons: -Oxygenated (Keytones, etc.): -Lacquer Solvents:	Poor Poor Excellent Poor
Resistance To -Swelling in Lubricating Oil: -Gasoline: -Animal and Vegetable Oil: -Water Absorption: -Oxidation: -Ozone: -Sunlight Aging: -Heat Aging: -Flame: -Heat: -Cold:	Poor Poor Fair Excellent Excellent Excellent Excellent Good Poor Excellent Good

Ethylene-Propylene
3-5601-70: A general purpose ethylene propylene compound for fluid service and for belt-drive service. Demonstrates excellent resistance to ozone and flexing. Temperature range -70°F to +300°F in certain applications.

Compound Number:	3-5601-70
Use with:	Water Alcohol Acetone Ammonia Engine coolant Vegetable oil Animal fats
Do not use with:	Petroleum oils and fuels Toluene Trichloroethane
Temperature Range (F):	-65° to +200°
Comments:	Conforms to FDA requirements (except for milk and edible oils). Reference CFR 177.2600

Ethylene-Propylene
3-5607-80: Compounded specifically for service in Skydrol hydraulic systems in commercial aircraft. Temperature range -65°F to +250°F, intermittent to +300°F.

Compound Number:	3-5607-80
Use with:	Skydrol
Special Applications:	Commercial aircraft hydraulic system seals
Temperature Range (F):	-65° to +250°
Military Drawing Numbers:	NAS 1611 NAS 1612
Comments:	Also meets spec. NAS 1613. Approved by Boeing and McDonnell-Douglas. O-Rings carry green dot, white dash, green dot identification assigned to Parco.