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Highly weather-resistant formulation for long-term gloss and color retention.
Excellent chemical resistance to solvents, acids, and alkalis in cured coatings.
Low viscosity enables easy handling and high-solids formulation without reactive diluents.
Outstanding UV stability, suitable for outdoor architectural and industrial applications.
Compatible with standard TGIC and hydroxyalkylamide (HAA) curing agents for flexible powder coating systems.
Architectural aluminum extrusions for curtain walls and window frames.
Automotive exterior trim and non-under-hood components.
Outdoor furniture and garden equipment coatings.
Industrial metal furniture and storage cabinets.
General-purpose coil and appliance coatings requiring durability and aesthetics.
| Chemical Type | Saturated polyester resin for thermoset powder coatings |
| Product Form | Pale yellow to light amber solid flakes or granules |
| Appearance | Free-flowing, homogeneous particles; no visible impurities |
| Acid Value (mg KOH/g) | 24–28 |
| Gardner Color (on 50% w/w solution in xylene) | ≤3 |
| Melt Viscosity (at 160°C, Pa·s) | 3,000–5,000 |
| Softening Point (°C, Ring & Ball) | 72–78 |
| Primary Applications | High-performance outdoor powder coatings |
Q1: What is the primary application of Uralac SN905 in powder coating formulations?
A: Uralac SN905 is specifically designed as a low-viscosity, high-reactivity saturated polyester resin for use in TGIC-free and HAA-based thermosetting powder coatings, particularly where excellent flow, smoothness, and mechanical durability are required—such as for indoor architectural and general industrial metal finishes.
Q2: How does Uralac SN905 differ from standard saturated polyesters used in powder coatings?
A: Unlike conventional saturated polyesters, Uralac SN905 features a tailored molecular architecture that delivers enhanced reactivity with hydroxyalkyl amides (HAAs), improved melt viscosity control during curing, and superior resistance to yellowing under thermal stress—making it especially suitable for thin-film, high-gloss, and heat-sensitive substrates.
Q3: Is Uralac SN905 compatible with common powder coating additives and pigments?
A: Yes, Uralac SN905 demonstrates broad compatibility with standard powder coating additives—including flow agents, degassing agents, benzoin, and most organic and inorganic pigments—without compromising cure response or film integrity, though compatibility testing with specific formulations is always recommended.
Q4: What storage conditions are recommended to maintain Uralac SN905 stability?
A: Store in original sealed packaging at temperatures between 5 °C and 30 °C, away from direct sunlight and sources of heat or moisture. Prolonged exposure to high humidity or elevated temperatures may affect handling properties and reactivity 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
