K-FLEX XM-337 is an aliphatic saturated polyester diol modifier resin designed to provide increased toughness and chemical resistance for solvent based and high solids systems. It is recommended for use in 1 and 2 component polyurethanes, and blocked isocyanate systems. Benefits include low color, UV durability, high hardness, high impact resistance, abrasion resistance and overall increased toughness
Viscosity @ 25°C 55,000 cPs
Hydroxyl Number 220
Equivalent Weight, g/eq. (as supplied) 260
Application Advantage Flexibility
Application Advantage Hardness
Application Advantage QUV resistance
Application Advantage Chemical resistance
Application Advantage Optical clarity
Formulation Advantage 100% active
Market Application Aerospace
Market Application Optically clear urethane elastomers
Market Application Urethane ballistic systems
Market Application Ophthalmic lenses
Market Application Thermoplastic urethanes
Market Application Adhesives
Product Group Polyester diol

Downloads

Related Products

  • Viscosity @ 25°C 10,000 cPs
  • Hydroxyl Number 230
  • Equivalent Weight, g/eq. (as supplied) 244
  • Polyester diol Most versatile polyester diol. Improves flexibility while maintaining hardness. Also improves salt spray, humidity resistance and exterior durability. Highly recommended for 2k PU.

  • Viscosity @ 25°C 3,750 cPs
  • Hydroxyl Number 235
  • Equivalent Weight, g/eq. (as supplied) 238
  • Polyester diol Lower viscosity version of K-FLEX 188. Improves flexibility and gloss. Good flow and leveling. Excellent intercoat adhesion. Recommended for primers.

  • Viscosity @ 25°C 1,500 cPs
  • Hydroxyl Number 260
  • Equivalent Weight, g/eq. (as supplied) 216
  • Polyester diol Low viscosity, providing good hardness and adhesion while lowering VOCs. Recommended for acrylic/isocyanate and acrylic/melamine systems.

  • Viscosity @ 25°C 400 cPs
  • Hydroxyl Number 265
  • Equivalent Weight, g/eq. (as supplied) 212
  • Polyester diol Lowest viscosity polyester diol that produces the softest films. Provides abrasion resistance, scratch resistance and good weatherability.

  • Viscosity @ 25°C 7,200 cPs
  • Hydroxyl Number 400
  • Equivalent Weight, g/eq. (as supplied) 140
  • Polyester diol Cost effective diol. Improves hardness and flexibility. Good exterior durability and chemical resistance. Recommended for 2K PU general purpose coatings and elastomers.