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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 household cleaners, mild acids, and alkalis.
Optimized reactivity for efficient curing with TGIC or hydroxyalkylamide (HAA) crosslinkers.
Consistent batch-to-batch quality and low volatile organic content (VOC).
Architectural aluminum extrusions (e.g., window frames, curtain walls).
Automotive exterior trim and non-structural components.
Outdoor furniture and garden equipment coatings.
General industrial metal finishing requiring durable decorative finishes.
Appliance housings exposed to ambient environmental conditions.
| Chemical Type | Carboxyl-functional saturated polyester |
| Product Form | Free-flowing white to off-white granules |
| Appearance | Homogeneous granular solid |
| Acid Value (mg KOH/g) | 28–32 |
| Number Average Molecular Weight (Mn) | ~2,400–2,800 g/mol |
| Glass Transition Temperature (Tg) | 68–72 °C |
| Primary Applications | Exterior powder coatings for architectural and industrial metals |
| Key Features | Weather durability, gloss retention, chemical resistance, balanced reactivity |
Q1: What is the primary application of CRYLCOAT 2637-3 in powder coatings?
A: CRYLCOAT 2637-3 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free and low-TGIC hybrid powder coating systems, delivering excellent flow, gloss retention, and mechanical durability—particularly suited for indoor architectural and general industrial finishes.
Q2: How does CRYLCOAT 2637-3 perform under UV exposure and weathering conditions?
A: As a standard aromatic polyester, CRYLCOAT 2637-3 offers good initial performance but is not formulated for long-term exterior weathering; it is recommended for interior applications or protected outdoor environments where extended UV resistance is not required.
Q3: Which curing agents are compatible with this resin?
A: CRYLCOAT 2637-3 is optimized for use with beta-hydroxyalkylamide (HAA) crosslinkers such as Primid® XL-552 and similar alternatives, enabling robust cure profiles at typical powder coating bake temperatures (180–200 °C for 10–20 minutes).
Q4: Is CRYLCOAT 2637-3 suitable for low-cure or energy-efficient powder formulations?
A: While not classified as a true low-cure resin, CRYLCOAT 2637-3 demonstrates reliable reactivity with HAA systems at standard cure schedules; formulation adjustments—including catalyst selection and particle size distribution—can support moderate reductions in time/temperature without compromising film integrity.
Q5: What handling and storage conditions are recommended to maintain resin stability?
A: Store in original unopened containers in a cool, dry, well-ventilated area away from direct sunlight and heat sources; avoid prolonged exposure to high humidity or temperature fluctuations to prevent agglomeration or premature reactivity.
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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
