Exxon™ butyl rubber

Close-up of top of automobile tire curing bladder

Exxon butyl rubber is the foundation of today’s butyl rubber technology. Butyl rubber is a copolymer of isobutylene and a small amount of isoprene providing for a highly saturated backbone. The primary properties of butyl rubber are excellent air-barrier performance, good flex fatigue and vibration damping.

From innertubes to curing bladders, butyl properties are valued across a range of rubber products

Properties

  • Low permeability to air, gases and moisture
  • Vibration damping
  • Low glass transition temperature
  • Low modulus elastomer
  • Low compression set
  • Resistance to aging and to weathering from atmospheric exposure
  • Wide vulcanization versatility
  • Fast cure rates
  • Processing safety: no nitrosamines or nitrosamines precursors

Benefits of high extensibility

  • Broad range of durometer and tensile strength properties
  • Low filler content for specific gravity, cost-effective compounding

Manuals
Read about effective use, applications and compounding/processing guidelines.