BIIR - Bromobutyl rubber
Clwyd reference | BIIR |
ASTM classification | BIIR |
Both butyl and halobutyl rubbers provide excellent inflation pressure retention. They are an ideal choice for inner tubes of bicycles, trucks, and industrial and agricultural tires. In fact, halogenated butyl rubbers are the most widely used butyl rubbers for tire inner liners. Halobutyl rubbers are also used for hoses, seals, membranes, tank linings, conveyor belts, protective clothing and for consumer products, such as ball bladders for sporting goods. Halobutyls are generally a good choice when good resistance to chemicals, weathering, and ozone is required. | |
Typical applications |
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Advantages |
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Disadvantages | Lower resilience |
Available hardness range (Shore A) | 35 - 90 |
Upper continuous service temp. | 130°C |
Min. temp. for sealing applications | -50°C |
Minimum non-brittle temp. | -70°C |
Tensile strength (up to) | 18 MPa |
Elongation at break (up to) | 650% |
Price Bracket | Very low |
ASTM 1 Oil | None |
ASTM 2 Oil | None |
ASTM 3 Oil | None |
Kerosene | None |
Liquid B | None |
Liquid 101 | None |
Phosphate ester | Good |
Ketone | Good |
Toluene | None |
Iso-octane | None |
Methanol | Excellent |
Acid (weak) | Good |
Acid (strong) | None |
Base (weak) | Excellent |
Base (strong) | Good |
Hydrogen sulphide | Excellent |
Steam | Good |
Ozone | Excellent |
Radiation | Good |