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High-gloss, excellent flow and leveling for premium surface appearance.
Outstanding weather resistance and UV stability for long-term outdoor performance.
Good chemical resistance to solvents, acids, and alkalis in cured powder coatings.
Optimized reactivity for balanced cure schedule with standard TGIC or HAA crosslinkers.
Low melt viscosity enabling smooth film formation and reduced orange peel.
Architectural aluminum extrusions (e.g., window frames, curtain walls).
Automotive exterior trim and non-under-hood components.
Outdoor furniture and garden equipment coatings.
Electrical enclosures and street lighting fixtures.
General industrial metal finishing requiring durable gloss retention.
| 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) | 26–30 |
| Number Average Molecular Weight (Mn) | ~2,800–3,200 g/mol |
| Glass Transition Temperature (Tg) | 68–72 °C |
| Softening Point (°C) | 78–82 |
| Primary Applications | Exterior-grade TGIC-free and TGIC-based powder coatings |
Q1: What is the primary application of CRYLCOAT 4540-0 in powder coating systems?
A: CRYLCOAT 4540-0 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free, high-gloss, exterior-grade powder coatings—commonly applied to architectural aluminum, outdoor furniture, and façade components where weather resistance and long-term color retention are critical.
Q2: How does CRYLCOAT 4540-0 contribute to UV stability and gloss retention?
A: Its molecular structure features optimized aromatic/aliphatic balance and controlled acid value, enabling excellent crosslink density with common curing agents like β-hydroxyalkyl amides (HAA), which supports superior resistance to UV-induced chalking, gloss loss, and yellowing under prolonged outdoor exposure.
Q3: Is CRYLCOAT 4540-0 compatible with standard powder coating processing equipment?
A: Yes—it exhibits good melt viscosity behavior and extrusion stability, making it suitable for conventional twin-screw extruders and standard grinding/sieving processes used in industrial powder coating production without requiring special handling or modifications.
Q4: What type of curing agent is typically recommended for use with this resin?
A: CRYLCOAT 4540-0 is formulated for use with HAA-type curing agents (e.g., Primid® XL-552 or equivalent), delivering full cure at typical industrial bake schedules (e.g., 180–200 °C for 10–20 minutes), with low VOC emissions and no TGIC-related safety concerns.
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E-mail: wangxingqiang@ericwchem.com
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