Kowa American Corporation


Low and Ultra-low Viscosity HDI-based polyisocyanates

Low Viscosity HDI-polyisocyanates
Polyisocyanate based on the widely used aliphatic hexamethylene-1,6-diisocyanate (HDI). These are primarily used for high performance coatings applications to improve weatherability and UV/chemical resistance.

These low and ultra low viscosity grades have 100% symmetrical chemical structure enabling better performance compared to competitors which have slight biuret contamination. The higher quality is great for non-solvent formulations and enables better surface smoothness and gloss retention.


Grade TUL-100 TLA-100 TPA-100 TKA-100
Solid wt% 100 100 100 100
NCO wt% 23.0 23.3 23.1 21.7
Viscosity 300 500 1400 2600

Chemical Structure

Chemical Structure


  • Abrasion
  • Adhesion
  • Low Viscosity
  • Resistance
  • Scratch Resistance
  • Weatherability


  • Adhesives
  • Automotive coatings
  • Construction Coatings
  • Electronics
  • Industrial Coatings
  • Polyurethane Elastomers
  • Printing Ink
  • Resins