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Butyl Rubber
Butyl Rubber is a synthetic rubber, a copolymer of isobutylene with isoprene. The product is impermeable to air and used in many applications requiring an airtight rubber. Butyl Rubber has good flex properties, resulting from low levels of unsaturation between long poly isobutylene segments. It also has a high level of heat resistance and excellent low-temperature flexibility.
Butyl Rubber is used in the manufacture of tyre inner liners, automotive tubes, pharmaceutical closures, ball bladders, adhesives, sealants, vibration mounts, electrical fluids and lubricants among others.
Following is the specification of Butyl Rubber offered by Relflex Elastomers
| Parameter | IMPRAMER R 1675 | Unit | Test Method |
|---|---|---|---|
| Mooney Viscosity (ML 1+8, 125°С) | 46 – 56 | MU | ASTM D 1646 |
| Unsaturation | 1.4 - 1.8 | mol % | SIBUR Method |
| Volatile Matter | max. 0.3 | wt % | ASTM D5668 |
| Non-Staining Antioxidant | 0.02 – 0.08 | wt % | SIBUR Method |
| Ash | max. 0.3 | wt % | ASTM D5667 |
| ASTM D 3188; 40 Minutes @ 150° C | ||
|---|---|---|
| Modulus at 300% Elongation, MPa, (min) | 7.0 | ASTM D412 |
| Tensile strength, MPa, (min) | 15.0 | ASTM D412 |
| Elongation at break, % (min) | 450 | ASTM D412 |