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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, acids, and household cleaners.
Optimized for TGIC-free curing systems, supporting sustainable powder coating formulations.
Consistent batch-to-batch reproducibility and reliable processing in standard extrusion equipment.
Architectural aluminum extrusions (e.g., window frames, curtain walls).
Outdoor furniture and garden equipment coatings.
Agricultural and construction machinery components.
Street lighting fixtures and traffic infrastructure elements.
Consumer appliances requiring durable, decorative finishes.
| 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 (10% w/w in MIBK) | ≤ 3 |
| Melt Viscosity (180°C, Pa·s) | 3,500–4,500 |
| Softening Point (°C, ASTM E28) | 78–84 |
| Key Features | Weather-resistant, TGIC-free compatible, high-gloss capable |
Q1: What is the primary application of CRYLCOAT 1638-2 in powder coatings?
A: CRYLCOAT 1638-2 is a carboxyl-functional polyester resin designed for use in TGIC-free and TGIC-containing triglycidyl isocyanurate (TGIC) cured powder coating systems, particularly where high gloss, excellent flow, and good mechanical properties are required — such as in architectural, general industrial, and appliance finishes.
Q2: Is CRYLCOAT 1638-2 compatible with common crosslinkers besides TGIC?
A: Yes, it is formulated to be compatible with alternative crosslinkers including hydroxyalkyl amides (HAA), glycidyl ester acrylates, and other epoxy-functional curing agents, supporting formulation flexibility for low-bake, high-performance, or regulatory-compliant systems.
Q3: How does CRYLCOAT 1638-2 perform in terms of weather resistance and UV stability?
A: As a high-purity, aromatic polyester resin, it delivers robust long-term durability and resistance to chalking and gloss loss under outdoor exposure, especially when combined with high-quality pigments and UV stabilizers — making it suitable for exterior-grade architectural and façade applications.
Q4: What are the recommended storage conditions for this resin?
A: Store in original unopened containers in a cool, dry, well-ventilated area away from direct sunlight and sources of heat or ignition. Avoid prolonged exposure to humidity or temperature fluctuations to maintain optimal reactivity and handling characteristics.
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E-mail: wangxingqiang@ericwchem.com
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