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Excellent chemical resistance to solvents, acids, and household cleaners.
High gloss retention and superior color stability under UV exposure.
Low viscosity for easy formulation and excellent flow/leveling in coating systems.
Good compatibility with melamine-formaldehyde crosslinkers and standard additives.
Designed for low-VOC, high-performance powder coating applications.
Architectural aluminum extrusions (curtain walls, windows, doors).
Automotive exterior trim and under-hood components.
Outdoor furniture and garden equipment coatings.
White goods and domestic appliance housings.
Industrial metal fabrication and general-purpose decorative finishes.
| Chemical Type | Saturated polyester resin |
| Product Form | Free-flowing white to off-white granules |
| Appearance | Homogeneous granular solid |
| Acid Value (mg KOH/g) | 24–28 |
| Hydroxyl Value (mg KOH/g) | 15–19 |
| Gel Time (200 °C, seconds) | 60–90 |
| Melt Viscosity (170 °C, Pa·s) | 5–8 |
| Primary Applications | Standard-cure thermosetting powder coatings |
Q1: What is the primary application of Uralac SN820 in powder coating formulations?
A: Uralac SN820 is specifically designed as a low-viscosity, high-reactivity saturated polyester resin for TGIC-free, weather-resistant thermosetting powder coatings—commonly used in architectural and industrial exterior applications where long-term gloss retention and UV stability are critical.
Q2: How does Uralac SN820 differ from standard GMA-acrylate-based resins in terms of crosslinking behavior?
A: Unlike GMA-acrylate systems, Uralac SN820 features carboxyl functionality and is formulated to react efficiently with epoxy-cured or hybrid curing agents—offering improved flow, reduced yellowing during cure, and enhanced mechanical film integrity without relying on glycidyl methacrylate chemistry.
Q3: Is Uralac SN820 suitable for use in food-contact compliant powder coatings?
A: Uralac SN820 is not inherently certified for food contact; however, it may be incorporated into finished coating systems that meet relevant regional food-contact regulations—subject to full formulation validation, including selection of compatible curatives, additives, and pigments, and final migration testing by the coating manufacturer.
Q4: What storage conditions are recommended to maintain optimal performance?
A: Store Uralac SN820 in original sealed containers in a cool, dry, well-ventilated area, away from direct sunlight and sources of heat or ignition. Prolonged exposure to elevated temperatures or humidity may affect viscosity and reactivity profile over time.
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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
