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High chemical resistance to solvents, acids, and alkalis in cured powder coatings.
Excellent flow and leveling properties for smooth, high-gloss finishes.
Outstanding UV stability and weatherability for outdoor applications.
Low melt viscosity enabling efficient extrusion and optimal film formation.
Compatible with standard TGIC and hydroxyalkylamide (HAA) curing agents.
Architectural aluminum extrusions for façades and window systems.
Outdoor furniture and garden equipment coatings.
Agricultural and construction machinery components.
Street lighting fixtures and traffic signage housings.
Industrial metal office furniture and shelving systems.
| Chemical Type | Saturated polyester resin for thermosetting powder coatings |
| Product Form | Free-flowing white to off-white granules |
| Appearance | Granular solid, homogeneous, free of lumps |
| Acid Value (mg KOH/g) | 25–35 |
| Gardner Color (on 50% solution in MEK) | ≤ 2 |
| Softening Point (°C, Ring & Ball) | 75–85 |
| Number Average Molecular Weight (Mn) | ~2,800–3,200 |
| Primary Applications | High-durability exterior powder coatings requiring long-term gloss retention and corrosion protection |
Q1: What is the primary application of Uralac SN863 in powder coating formulations?
A: Uralac SN863 is specifically designed as a low-Tg saturated polyester resin for use in high-performance, low-cure powder coatings—particularly where excellent flow, smoothness, and mechanical resistance are required, such as in architectural and general industrial applications.
Q2: How does Uralac SN863 differ from standard TGIC-free polyester resins?
A: Unlike many conventional polyester resins, Uralac SN863 offers enhanced reactivity with hydroxy-functional curing agents (e.g., β-hydroxyalkyl amides), enabling faster cure at lower temperatures while maintaining good storage stability and film integrity.
Q3: Is Uralac SN863 suitable for outdoor applications requiring UV resistance?
A: Yes—Uralac SN863 exhibits inherently good weathering performance due to its saturated backbone and optimized molecular structure, making it well-suited for exterior-grade powder coatings when properly formulated with appropriate stabilizers and pigments.
Q4: What types of curing agents are compatible with Uralac SN863?
A: Uralac SN863 is primarily intended for use with hydroxyl-reactive crosslinkers, especially β-hydroxyalkyl amide (HAA) systems. It is not recommended for use with TGIC or epoxy-based curing agents without thorough compatibility testing.
Q5: How should Uralac SN863 be stored to maintain optimal performance?
A: Store in a cool, dry place below 30 °C, away from direct sunlight and moisture. Keep containers tightly sealed to prevent absorption of ambient humidity, which may affect flow behavior and gel time during extrusion.
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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
