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High-gloss, excellent flow and leveling for premium surface aesthetics.
Outstanding weather resistance and UV stability for long-term outdoor performance.
Good chemical resistance to solvents, cleaning agents, and mild acids.
Optimized reactivity for efficient curing with TGIC-free crosslinkers.
Low viscosity enabling high-solids formulations and improved application efficiency.
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.
Coil coating topcoats for pre-painted metal substrates.
| Chemical Type | Carboxyl-functional saturated polyester |
| Product Form | Powder (free-flowing granules) |
| Appearance | White to off-white free-flowing powder |
| Acid Value (mg KOH/g) | 28–32 |
| Number Average Molecular Weight (Mn) | ~2,800–3,200 g/mol |
| Tg (DSC, °C) | 68–72 |
| Primary Applications | High-performance TGIC-free and HAA-based powder coatings |
| Key Features | Weather durability, gloss retention, smooth film formation |
Q1: What is the primary application of CRYLCOAT 4642-3 in powder coatings?
A: CRYLCOAT 4642-3 is a carboxyl-functional polyester resin specifically designed for use in TGIC-free, high-gloss, decorative powder coating systems—particularly where excellent flow, leveling, and long-term weather resistance are required.
Q2: Is CRYLCOAT 4642-3 compatible with standard epoxy-based curing agents?
A: No—CRYLCOAT 4642-3 is formulated for use with hydroxyalkylamide (HAA) curing agents, not epoxy resins. Its carboxyl functionality enables efficient crosslinking with HAA systems to achieve full cure at typical powder coating bake schedules.
Q3: How does CRYLCOAT 4642-3 contribute to film appearance and durability?
A: This resin delivers outstanding gloss retention, minimal orange peel, and enhanced resistance to UV exposure and chalking—making it well-suited for outdoor architectural and industrial applications where aesthetic consistency over time is critical.
Q4: Can CRYLCOAT 4642-3 be blended with other polyester resins to modify performance?
A: Yes—formulators commonly blend CRYLCOAT 4642-3 with complementary carboxyl-functional polyesters to fine-tune reactivity, melt viscosity, or weathering balance—though compatibility and cure response should be verified experimentally for each intended blend ratio.
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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
