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Rubber Technologist Wanted for Growing Team - April 2017

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Polymer Types - BIIR - Bromobutyl rubber...

Clwyd reference BIIR
ASTM classification BIIR

Derivative of butyl rubber which has been reacted with bromine in a continuous process.

Typical applications Inner tyre tubes, breathing apparatus for defence and fire services
Advantages

Low gas permeability
Excellent  ozone resistance
Good steam resistance
Good fire 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) 650%

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