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Unilink

The Dorf Ketal Unilink range of aromatic diamines have been developed as chain extenders for polyurethane elastomers.

Unilink products can be used as effective curing agents for both TDI and MDI formulations. Polymers cured with Unilink generally exhibit longer pot lives and lower hardness with improved strength, adhesion and impact resistance.

Polyurethane systems can also benefit from the use of Unilink. TDI and MDI based slabstock and moulded flexible foams can show improved strength and load-bearing properties often at significantly lower foam densities while PUR and PIR rigid foam formulations demonstrate improved dimensional stability, flow and adhesion.

Popular Dorf Ketal Unilink grades are detailed in the table below, other grades are available.

 

Products

Product Name Description Applications/Benefits Add to My Enquiry
Unilink 4100 Aromatic diamine Recommended for MDI elastomers
  • Increased strength and heat resistance compared to diol cures
  • Low viscosity improves handling and processing
  • Tough, hard (80D) elastomers available
Unilink 4200 Aromatic diamine Recommended for flexible slabstock foams (especially for HR,CMHR and polyester)
  • Reduction in foam density
  • Improved hardness and load bearing properties
  • Increased Tensile, tear and elongation
Cold Moulded Foams
  • Reduction in foam density
  • Improved IFD (harder TDI foams, softer MDI foams)
  • Increased tensile, tear and elongation
  • Improved flow
Rigid PUR and PIR Foams
  • Improved dimensional stability