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High-gloss, excellent flow and leveling for smooth, defect-free cured films.
Outstanding weather resistance and UV stability for long-term outdoor performance.
Good chemical resistance to solvents, acids, and alkaline cleaners after curing.
Optimized reactivity with TGIC-free curing agents for low-bake and sustainable powder coatings.
Consistent batch-to-batch reproducibility supporting reliable industrial-scale production.
Architectural aluminum extrusions for façades, windows, and curtain walls.
Outdoor furniture and garden equipment requiring durable decorative finishes.
Agricultural and construction machinery components exposed to harsh environments.
Street lighting fixtures and traffic infrastructure elements.
| Chemical Type | Carboxyl-functional saturated polyester |
| Product Form | Pale yellow to light amber solid granules |
| Appearance | Free-flowing, homogeneous granules |
| Acid Value (mg KOH/g) | 27–33 |
| Gardner Color (meq/100 g) | ≤ 3 |
| Melt Viscosity (Pa·s at 200 °C) | 3,500–5,500 |
| Softening Point (°C, Ring & Ball) | 78–84 |
| Primary Applications | TGIC-free and HAA-cured high-performance powder coatings |
Q1: What is the primary application of CRYLCOAT 1660-5 in powder coatings?
A: CRYLCOAT 1660-5 is a carboxyl-functional polyester resin specifically designed as a binder for TGIC-free, high-gloss, and durable thermosetting powder coatings—commonly used for architectural aluminum extrusions, appliances, and general industrial metal finishing.
Q2: Is CRYLCOAT 1660-5 compatible with common curing agents other than β-hydroxyalkyl amides (HAA)?
A: While optimized for use with HAA-type crosslinkers such as Primid XL-552, CRYLCOAT 1660-5 can also be formulated with alternative low-TGIC or TGIC-free systems; however, compatibility, cure schedule, and final film properties must be verified experimentally for each specific system.
Q3: How does CRYLCOAT 1660-5 contribute to weather resistance in outdoor applications?
A: As a saturated, aromatic-aliphatic polyester, CRYLCOAT 1660-5 delivers balanced UV stability and mechanical durability, supporting excellent gloss retention and chalking resistance in exterior-grade powder coatings when properly formulated and cured.
Q4: What are the recommended storage conditions to maintain resin performance?
A: Store in original unopened containers in a cool, dry, and well-ventilated area below 30 °C, protected from moisture and direct sunlight. Prolonged exposure to high humidity or elevated temperatures may affect flow behavior and reactivity.
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E-mail: wangxingqiang@ericwchem.com
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