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High-gloss, durable finish with excellent flow and leveling characteristics.
Optimized for low-cure temperature applications (160–180 °C), reducing energy consumption.
Superior resistance to yellowing and UV degradation in outdoor exposure conditions.
Excellent compatibility with standard triglycidyl isocyanurate (TGIC) and hydroxyalkyl amide (HAA) curing agents.
Consistent batch-to-batch performance and broad formulation flexibility for powder coatings.
Architectural aluminum extrusions for façades and window frames.
Outdoor furniture and garden equipment requiring weather-resistant finishes.
Agricultural and construction machinery components.
Light industrial equipment housings and enclosures.
Automotive non-critical exterior trim parts.
| Chemical Type | Carboxyl-functional saturated polyester resin |
| Product Form | Free-flowing granular solid |
| Appearance | Off-white to pale yellow granules |
| Acid Value (mg KOH/g) | 27–31 |
| Softening Point (°C, Ring & Ball) | 75–82 |
| Melt Viscosity (Pa·s at 200 °C) | 3.5–5.5 |
| Gel Time (sec at 200 °C, with 5% TGIC) | 80–120 |
| Primary Applications | Exterior-grade thermosetting powder coatings |
Q1: What is the primary application of CRYLCOAT 2684-4 in powder coating formulations?
A: CRYLCOAT 2684-4 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free, high-gloss, and semi-gloss thermosetting powder coatings—particularly where excellent flow, leveling, and long-term weather resistance are required, such as for outdoor architectural and industrial metal substrates.
Q2: Which curing agents is CRYLCOAT 2684-4 typically crosslinked with?
A: This resin is formulated to react efficiently with standard epoxy-functional hardeners, including glycidyl ester and glycidyl amide types, enabling robust TGIC-free cure systems. Compatibility with alternative co-reactants should be verified experimentally in the final formulation.
Q3: How does CRYLCOAT 2684-4 perform in terms of UV stability and gloss retention?
A: As a high-purity, low-impurity aromatic-aliphatic polyester, it delivers strong resistance to chalking and gloss loss under prolonged UV exposure—making it well-suited for demanding exterior applications without requiring additional UV stabilizers in many standard formulations.
Q4: Is CRYLCOAT 2684-4 suitable for low-cure or low-temperature powder coating processes?
A: While optimized for standard curing cycles (e.g., 180–200 °C for 10–20 minutes), its reactivity profile allows for partial adaptation to lower-cure conditions when paired with highly reactive hardeners—though full performance validation is recommended for each specific thermal schedule.
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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
