Under the trade name IRODUR®, Huntsman offers a range of polyisocyanates that are used as hardeners for two-component polyurethane and polychloroprene adhesives.

Adding IRODUR® to adhesive formulations results in:

  • Optimum cohesion and adhesion
  • Rapid crosslinking and fast curing
  • Outstanding heat stability
  • Maximum resistance to solvents, fats and plasticizers

A firm favourite for footwear applications IRODUR® hardeners are used where the strength and reliability of an adhesive bond really matters, for example, in shoe sole applications where different materials need to firmly stick together.

Huntsman offers a choice of IRODUR® hardeners for the footwear industry including solutions for different soling substrates such as leather, EVA, PVC and rubber - helping adhesive formulators and footwear designers improve quality and performance every step of the way.

  • Sport shoes
  • Casual shoes
  • Safety shoes
  • Fashion shoes




IRODUR® - Huntsman Polyisocyanate Hardeners

Individual IRODUR® hardener grades are available with properties geared specifically towards particular fields of adhesive application:

  • Footwear
  • Automotive
  • Packaging
  • Furniture production


  • Significantly raise the softening point of adhesive films
  • Improve solvent resistance and prevent migration of plasticizers, grease and oil
  • Increase resistance to chemical degradation / hydrolysis
  • Improve water resistance of bonds with wood glues
  • Improve adhesive resistance to discoloration when exposed to light


Products and Technologies