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Butyl Rubber, produced by copolymerizing isobutylene with small amounts of isoprene, is characterized by good resistance to many chemicals, sunlight, ozone and weather resistance, low permeability to gases, good heat and age resistance and excellent low temperature resistance. It is not resistant to petroleum oils and solvents, but it possesses excellent resistance to the phosphate ester-type fire-resistant hydraulic fluids.
Sample compound information: 6-823-70
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Butyl Rubber
6-823-70: Primarily used to seal Pydraul, Lindol, Cellulube and similar phosphate-ester based fire-resistant hydraulic fluids. Temperature range -65°F to +180°F in these fluids or -65°F to +280°F in air. Possesses good resistance to a wide variety of chemicals.
| Compound Number: |
6-823-70 |
| Use with: |
Alcohol
Water
Skydrol
Pydrane
Ammonia
Acetone
Hydrazine
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| Do not use with: |
Petroleum oils and fuels
Toluene
Trichloroethane |
| Special Applications: |
Seals for hydrazine and U.D.M.H. (Rocket fuels) |
| Temperature Range (F): |
-65° to +200° |
| Comments: |
Best resistance to permeation, but Ethylene Propylene has replaced Butyl for most O-Ring applications because ethylene propylene has virtually the same fluid resistance with better heat and compression set resistance. |
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