Engineered Moisture-Scavenging Additive for Defect-Free Powder Coatings VAPOROXOL®-3F is a surface-treated, high-purity Calcium Oxide (CaO) developed specifically to address moisture-related defects in powder coating formulations — particularly polyurethane...
Why VAPOROXOL-3F is the preferred choice for paints & coatings formulations
Comprehensive range of VAPOROXOL-3F grades for diverse industrial applications
Common questions about VAPOROXOL-3F in paints & coatings applications
In PU powder coatings, trace moisture reacts with isocyanate curing agents during extrusion and curing, releasing CO₂ gas that causes surface porosity, blistering, foaming, and gloss loss. VAPOROXOL®-3F chemically binds this moisture before it can react, ensuring defect-free film formation.
VAPOROXOL®-3F is based on highly hygroscopic Calcium Oxide (CaO) chemistry. Its surface-treated particles disperse uniformly within the powder matrix during dry-blending and extrusion, where they rapidly and selectively absorb residual moisture via exothermic CaO-H₂O reaction before the main curing process begins.
Yes — VAPOROXOL®-3F is surface-treated to provide controlled reactivity, safer handling, and reduced dustiness compared to raw CaO, making it suitable for use in standard twin-screw extrusion manufacturing environments with normal PPE precautions.
VAPOROXOL®-3F specifically prevents moisture-induced defects including: surface porosity, blistering, foam generation, gloss reduction, haze formation, and pinholes — defects most commonly associated with PU and Epoxy powder coatings cured in humid conditions or after extended storage.
Yes — guideline formulations show VAPOROXOL®-3F used in combination with MICRON MICA 1240 PY and FUSYL T-72 in Epoxy powder coatings, delivering enhanced barrier properties, film integrity, and chemical resistance while maintaining equivalent mechanical performance (Impact, Adhesion, Flexibility, Pencil Hardness).
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