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Highly crosslinkable for excellent chemical and solvent resistance in cured coatings.
Low viscosity enables easy handling, good flow, and high solids formulation without excessive solvents.
Excellent gloss retention and color stability under UV exposure and outdoor weathering.
Compatible with standard TGIC and hydroxyalkylamide (HAA) curing agents for powder coating systems.
Consistent batch-to-batch performance ensured by DSM’s stringent quality control and polymerization process.
Architectural aluminum extrusions for curtain walls and window frames.
Appliance housings including refrigerators, washing machines, and ovens.
Outdoor furniture and garden equipment requiring durable, weather-resistant finishes.
Automotive non-structural components such as trim, grilles, and wheel covers.
General industrial metal parts exposed to moderate corrosion and abrasion.
| Chemical Type | Saturated polyester resin (carboxyl-functional) |
| Product Form | Pale yellow to light amber granules or flakes |
| Appearance | Free-flowing, homogeneous solid at room temperature |
| Acid Value (mg KOH/g) | 26–30 |
| Gardner Color | ≤ 3 |
| Melt Viscosity (140 °C, Pa·s) | 1.5–2.5 |
| Glass Transition Temperature (°C) | 62–68 |
| Primary Applications | Exterior-grade thermosetting powder coatings |
Q1: What is the primary application of Uralac SN822 in powder coating formulations?
A: Uralac SN822 is specifically designed as a low-viscosity, high-reactivity saturated polyester resin for TGIC-free, weather-resistant thermosetting powder coatings—particularly suited for outdoor architectural and industrial applications requiring excellent gloss retention and UV stability.
Q2: How does Uralac SN822 differ from conventional high-acid-value polyesters used in powder coatings?
A: Unlike standard high-acid polyesters, Uralac SN822 features a tailored acid value and molecular weight distribution that enables faster cure kinetics at lower temperatures while maintaining excellent flow, leveling, and mechanical film properties without requiring excessive crosslinker loadings.
Q3: Is Uralac SN822 compatible with common powder coating crosslinkers other than β-hydroxyalkyl amides (HAA)?
A: Uralac SN822 is optimized for use with HAA-type crosslinkers such as Primid XL-552, but it can also be formulated with alternative non-TGIC systems like specific urea-based or blocked isocyanate crosslinkers—subject to compatibility testing and optimization of cure schedule and stoichiometry.
Q4: What storage conditions are recommended to maintain the stability and performance of Uralac SN822?
A: Store in original sealed containers in a cool, dry place below 30 °C, away from direct sunlight and sources of heat or moisture. Prolonged exposure to elevated temperatures or humidity may affect resin reactivity and handling characteristics over time.
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