K-Flex XM-B301 Polyester polyol King Industries Polyurethane (PU) - Polyols >> Polyester K-Flex polyester polyols (Table 1) are used primarily as modifiers for acrylic, alkyd, epoxy and polyester formulations. They have unique structures with a narrow molecular weight distribution designed for high reactivity and fast cure with melamine and isocyanate crosslinkers. Containing primary hydroxyl groups, K-Flex polyester polyols are typically used at 5-15% modification levels on standard resins to: Increase film flexibility Improve resistance properties Reduce VOC's, increase solids Achieve higher crosslink density, improve cure response A K-Flex/Melamine ratio of 60/40 is recommended for modifying typical resin systems. K-Flex XM-B301 100% Active Acetoacetate functional Modifying Resin * Active hydrogens react with amines in 2K epoxies resulting in faster low temperature cure systems with amine hardeners, an a reduction in blush with polyamide hardeners. Also improves salt spray, humidity resistance and flexibility. Acetoacetate functional modifying resin. Used as a modifier for acrylic, alkyd, epoxy and polyester formulations. Offers narrow molecular weight distribution, high reactivity and fast cure with melamine and isocyanate crosslinkers. Reacts with amines in 2K epoxies resulting in fast low temperature cure systems with amine hardeners, and a reduction in blush with polyamide hardeners. Improves salt spray, humidity resistance and flexibility. <br> Use level: 5-15% on standard resin.