BUTYL rubber is the synthetic elastomer resulting from the copolymerization of isobutylene and isoprene. It offers excellent resistance to extreme temperatures (-60°C to +180°C), bad weather and aging.
Advantages of Butyl rubber:
- Great impermeability.
- Excellent cushioning quality
- Good chemical resistance to: concentrated mineral acids (hydrochloric, sulfuric, hydrofluoric, nitric, phosphoric) ammonia and concentrated alkalis, halogenated or nitrated derivatives, organic acids (acetic, lactic), ketones, alcohols and esters.
- Very good resistance to extreme temperatures
Limits: hydrocarbons (oils and fats), aliphatic, aromatic or chlorinated solvents.
Example of IIR applications:
- Inner tubes,
- Gloves roof coverings,
- Shock absorbers
Sectors of use of Butyl:
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|GENERAL PROPERTIES||min - max|
|Hardness ShA||30 - 90 ShA|
|Hardness IRHD||30 - 90 IRHD|
|Tensile Strength||8 MPa - 20 MPa|
|Elongation at break||100% - 900%|
|Continuous Temperature||-55 C° - 120C°|
|Point Température||-55 C° - 130C°|
|Resistance to solvents|
|Resistance to acids|
Typical applications include diaphragms, gaskets, inner tubes, liners, O-rings, seals, speaker surrounds and bottle closures.