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Rubber in Engineering Group @ Clwyd - Sep 2018

Clwyd welcomed the Rubber in Engineering Group on Friday 21st September, more than 20 experts...read more

Polymer Types - IIR - Butyl rubber...

Clwyd reference IIR
ASTM classification IIR

Copolymer of isobutylene and isoprene

Typical applications Inner tubes for tyres, pond liners, ball bladders, adhesives, sealants, gloves, pharmaceutical stoppers, vibration dampening and protective clothing
Advantages

Low gas permeability
Good ozone and steam resistance

Disadvantages Poor resistance to oils and non-polar solvents
 
Available hardness range (Shore A) 35 – 90
Upper continuous service temp. (°C) 130
Min. temp. for sealing applications (°C) -50
Minimum non-brittle  temp.  (°C) -70
Tensile strength (up to) 18 MPa
Elongation at break (up to) 700%

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