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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, household cleaners, and mild acids.
Optimized for TGIC-free curing systems, supporting sustainable powder coating formulations.
Consistent batch-to-batch reproducibility and reliable melt viscosity control.
Architectural aluminum extrusions for curtain walls and window frames.
Outdoor furniture and garden equipment requiring durable decorative finishes.
Automotive non-critical exterior components (e.g., trim, grilles, brackets).
Industrial metal enclosures and electrical cabinets exposed to ambient conditions.
Consumer appliances with premium aesthetic and functional coating requirements.
| Chemical Type | Carboxyl-functional saturated polyester |
| Product Form | Free-flowing granular solid |
| Appearance | Off-white to light beige granules |
| Acid Value (mg KOH/g) | 34–38 |
| Gardner Color (on 50% solution in MIBK) | ≤ 2 |
| Melt Viscosity (at 180 °C, Pa·s) | 4.5–6.5 |
| Softening Point (°C, Ring & Ball) | 72–78 |
| Primary Applications | High-performance TGIC-free and HAA-cured powder coatings |
Q1: What is the primary application of CRYLCOAT 4891-0 in powder coatings?
A: CRYLCOAT 4891-0 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free (triglycidyl isocyanurate-free) thermosetting powder coating systems, particularly where high gloss, excellent flow, and robust mechanical properties are required — such as in architectural aluminum extrusions and general industrial finishing.
Q2: Is CRYLCOAT 4891-0 compatible with standard epoxy-based curing agents?
A: No — CRYLCOAT 4891-0 is formulated for use with hydroxyl-reactive crosslinkers such as β-hydroxyalkylamide (HAA) systems. It is not intended for epoxy-cured formulations, which typically require glycidyl-functional resins.
Q3: How does CRYLCOAT 4891-0 perform under weathering conditions?
A: As a high-performance polyester resin, CRYLCOAT 4891-0 delivers excellent UV resistance and long-term gloss retention when properly formulated and cured, making it suitable for exterior applications with demanding durability requirements.
Q4: What is the recommended curing schedule for coatings based on this resin?
A: Typical cure conditions fall within the range of 180–200 °C for 10–20 minutes, depending on substrate type, film thickness, and specific HAA crosslinker used. Optimization is advised during formulation development to balance performance and energy efficiency.
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E-mail: wangxingqiang@ericwchem.com
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