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High-gloss, excellent flow and leveling for premium surface aesthetics.
Outstanding weather resistance and UV stability for long-term outdoor performance.
Excellent chemical resistance to solvents, cleaning agents, and mild acids.
Good compatibility with standard TGIC and hydroxyalkylamide (HAA) curing agents.
Optimized melt viscosity for efficient extrusion and consistent powder coating film formation.
Architectural aluminum extrusions (e.g., window frames, curtain walls).
Automotive exterior trim and under-hood components.
Outdoor furniture and garden equipment.
Electrical enclosures and utility infrastructure housings.
Consumer appliances requiring durable, decorative finishes.
| Chemical Type | Carboxyl-functional saturated polyester |
| Product Form | Pale yellow to light amber solid pellets |
| Appearance | Free-flowing granular solid |
| Acid Value (mg KOH/g) | 27–31 |
| Gardner Color | ≤ 3 |
| Melt Viscosity (cP at 200°C) | 4,500–6,500 |
| Softening Point (°C, Ring & Ball) | 78–84 |
| Primary Applications | Exterior-grade TGIC-free and TGIC-based powder coatings |
Q1: What is the primary application of CRYLCOAT 2638-2 in powder coatings?
A: CRYLCOAT 2638-2 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free, high-gloss, weather-resistant thermosetting powder coatings—particularly for architectural and industrial metal finishing applications requiring excellent UV stability and long-term color retention.
Q2: Is CRYLCOAT 2638-2 compatible with common curing agents used in polyester-based powder systems?
A: Yes, it is fully compatible with standard epoxy-functional curing agents such as glycidyl ester (e.g., Primid XL-552) and other TGIC-free crosslinkers. It is formulated to deliver balanced reactivity, flow, and mechanical performance without requiring specialized catalysts in most standard formulations.
Q3: How does CRYLCOAT 2638-2 contribute to film properties like flexibility and impact resistance?
A: Its molecular architecture provides a favorable balance between rigidity and chain mobility, supporting good substrate adhesion, bending performance, and resistance to mechanical stress—making it suitable for coated components that undergo forming or handling after curing.
Q4: Can CRYLCOAT 2638-2 be blended with other polyester resins to modify performance?
A: Yes, it is commonly blended with complementary polyester resins—including lower-acid-value or higher-molecular-weight grades—to fine-tune melt viscosity, gloss level, cure response, or outdoor durability, provided compatibility and stoichiometric balance are verified during formulation development.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
