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Highly crosslinkable for excellent chemical and solvent resistance in cured coatings.
Low viscosity enables easy formulation and high-solids, low-VOC powder coating systems.
Outstanding flow and leveling properties for smooth, defect-free film formation.
Excellent compatibility with standard triglycidyl isocyanurate (TGIC) and hydroxyalkyl amide (HAA) curing agents.
Consistent batch-to-batch performance ensured by DSM’s stringent quality control and GMP-compliant manufacturing.
Architectural aluminum extrusions requiring durable, weather-resistant finishes.
Automotive exterior trim and under-hood components demanding thermal and chemical stability.
Outdoor furniture and garden equipment exposed to UV radiation and moisture.
Electrical enclosures and industrial machinery housings requiring corrosion protection and aesthetic integrity.
Agricultural and construction equipment subject to abrasion, impact, and environmental stress.
| Chemical Type | Saturated polyester resin (carboxyl-functional) |
| Product Form | Free-flowing white to off-white granules |
| Appearance | Homogeneous granular solid at room temperature |
| Acid Value (mg KOH/g) | 26–30 |
| Gardner Color (10% solution in methyl ethyl ketone) | ≤ 2 |
| Melt Viscosity (at 140°C, Pa·s) | 3.5–5.5 |
| Particle Size (D50, µm) | 35–55 |
| Storage Stability (25°C, sealed container) | ≥ 12 months |
Q1: What is the primary application of Uralac SN887 in powder coating formulations?
A: Uralac SN887 is specifically designed as a low-viscosity, high-reactivity saturated polyester resin for use in high-gloss, decorative thermoset powder coatings—particularly where excellent flow, leveling, and resistance to yellowing under UV exposure are required.
Q2: Is Uralac SN887 compatible with standard epoxy-curing agents?
A: Yes, Uralac SN887 is formulated for compatibility with conventional glycidyl-functional epoxy resins (e.g., triglycidyl isocyanurate or bisphenol-A based epoxies) and exhibits good reactivity in typical epoxy-polyester hybrid systems.
Q3: How does Uralac SN887 differ from standard TGIC-free curing polyesters?
A: Unlike many conventional TGIC-free polyesters, Uralac SN887 offers enhanced melt viscosity control and improved storage stability while maintaining high crosslink density—enabling superior film formation and mechanical performance without relying on hazardous crosslinkers.
Q4: What are the recommended storage conditions for Uralac SN887?
A: Store in original unopened containers in a cool, dry place below 30 °C, protected from moisture and direct sunlight. Prolonged exposure to elevated temperatures or humidity may affect flow behavior and shelf life.
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