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Highly crosslinkable solid saturated polyester with excellent compatibility with melamine-formaldehyde and urea-formaldehyde resins.
Low viscosity in solution, enabling high solids content formulations and improved application efficiency.
Outstanding film hardness, flexibility, and chemical resistance after curing.
Excellent gloss retention and weathering stability in outdoor coatings applications.
Consistent batch-to-batch quality supported by Evonik’s stringent GMP-compliant manufacturing control.
Automotive OEM and refinish topcoats requiring high durability and aesthetic performance.
Industrial maintenance coatings for metal substrates exposed to harsh environments.
Powder coatings for architectural aluminum profiles and façade systems.
General-purpose decorative and protective coil coatings on pre-painted metal (PPM).
| Chemical Type | Solid saturated polyester resin |
| Product Form | Free-flowing off-white to light yellow granules |
| Appearance (at 25 °C) | Granular, homogeneous solid |
| Acid Value (mg KOH/g) | 10–16 |
| Hydroxyl Value (mg KOH/g) | 35–45 |
| Gardner Color (10% in MEK) | ≤ 3 |
| Softening Point (°C, Ring & Ball) | 78–85 |
| Volatile Content (wt%, 120 °C/2 h) | ≤ 0.5 |
Q1: What is the primary application area for DYNAPOL L205?
A: DYNAPOL L205 is primarily used as a binder resin in high-performance powder coatings for architectural, industrial, and appliance applications where excellent gloss retention, weather resistance, and mechanical durability are required.
Q2: Is DYNAPOL L205 compatible with standard epoxy curing agents?
A: Yes, DYNAPOL L205 is specifically designed for use in epoxy–polyester hybrid powder coating systems and exhibits good reactivity and compatibility with common glycidyl-functional epoxy resins and crosslinkers such as TGIC or β-hydroxyalkylamide (HAA) alternatives.
Q3: How does DYNAPOL L205 differ from unsaturated polyester resins in powder coatings?
A: Unlike unsaturated polyesters, DYNAPOL L205 is a saturated polyester resin—meaning it contains no carbon–carbon double bonds in the backbone. This results in significantly improved UV stability, reduced yellowing upon weathering, and enhanced long-term color and gloss retention in exterior applications.
Q4: What are the recommended storage conditions for this resin?
A: Store DYNAPOL L205 in its 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 flow behavior and electrostatic charging performance in downstream powder processing.
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E-mail: wangxingqiang@ericwchem.com
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