RUBBER : BUTYL (IIR)

Known as Isobutylene-isoprene (IIR) or as Butyl,

Butyl, also known as Isobutylene-isoprene (IIR), is a synthetic rubber developed in the 1940’s. It has exceptionally low gas permeability making it ideal for inner tubes and high pressure/vacuum sealing applications. Its very low resilience makes it suitable for shock and vibration damping. Its chemical unsaturation gives it excellent resistance to heat, ozone, and weathering, and also to dilute acids and alkalis.

It is not suitable for use in mineral or petroleum based fluids.

caoutchouc BUTYL
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%
Operating temperature
Continuous Temperature -55 C° - 120C°
Point Température -55 C° - 130C°
Resistances
Resistance to solvents
Resistance to acids
oxygen Ageing
Ozone Ageing
light Ageing
cold Ageing --
heat Ageing --
Colors available :
 

Typical applications include diaphragms, gaskets, inner tubes, liners, O-rings, seals, speaker surrounds and bottle closures.

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