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 | Chemical resistance, Flexibility, Hardness, Optical clarity, QUV resistance |
| Formulation Advantage | 100% active |
| Market Application | Adhesives, Aerospace, Ophthalmic lenses, Optically clear urethane elastomers, Thermoplastic urethanes, Urethane ballistic systems |
| Product Group | Polyester diol |
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