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High-gloss, excellent flow and leveling for smooth, defect-free coatings.
Outstanding weather resistance and UV stability for long-term outdoor performance.
Good chemical resistance to solvents, cleaning agents, and mild acids.
Optimized reactivity for efficient curing with TGIC or HAA crosslinkers at standard powder coating temperatures.
Consistent batch-to-batch reproducibility ensuring reliable manufacturing performance.
Architectural aluminum extrusions for façades and curtain walls.
Outdoor furniture and garden equipment requiring durable decorative finishes.
Agricultural and construction machinery components exposed to harsh environments.
Residential and commercial lighting fixtures with aesthetic and functional demands.
Electrical enclosures and utility boxes requiring corrosion protection and color retention.
| Chemical Type | Carboxyl-functional saturated polyester |
| Product Form | Free-flowing white to off-white powder |
| Appearance | Homogeneous granular powder |
| Acid Value (mg KOH/g) | 27–33 |
| Gardner Color (on 50% solution in xylene) | ≤ 2 |
| Melt Viscosity (at 200°C, Pa·s) | 3,500–5,500 |
| Softening Point (°C, ASTM D36) | 78–84 |
| Particle Size (D50, µm) | 25–35 |
Q1: What is the primary application of CRYLCOAT 2621-2 in powder coating formulations?
A: CRYLCOAT 2621-2 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free, high-gloss, and durable thermosetting powder coatings—particularly suited for indoor architectural and general industrial applications where excellent flow, leveling, and mechanical performance are required.
Q2: Which curing agents is CRYLCOAT 2621-2 typically crosslinked with?
A: This resin is formulated to react efficiently with common epoxy-functional hardeners such as triglycidyl isocyanurate (TGIC) or alternative non-TGIC co-reactants like hydroxyalkyl amides (HAA), depending on the desired regulatory profile and performance targets.
Q3: How does CRYLCOAT 2621-2 contribute to film formation and appearance properties?
A: Its balanced molecular weight distribution and controlled acid value support superior melt viscosity behavior during curing, resulting in smooth, high-gloss finishes with minimal orange peel and excellent substrate coverage—even over complex geometries.
Q4: Is CRYLCOAT 2621-2 suitable for outdoor exposure?
A: While offering good initial durability, CRYLCOAT 2621-2 is primarily optimized for interior applications; for extended UV resistance and weatherability in exterior environments, Allnex recommends pairing it with more UV-stable resins or selecting dedicated exterior-grade alternatives from the CRYLCOAT portfolio.
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