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Highly crosslinkable solid saturated polyester resin with excellent compatibility in powder coating formulations.
Outstanding gloss retention and weather resistance due to fully saturated backbone and low acid value.
Optimized melt viscosity for smooth film formation and excellent flow/leveling in thermoset powder coatings.
Low volatile organic content (VOC-free) and compliant with stringent environmental and safety regulations.
Consistent batch-to-batch reproducibility supported by Evonik’s global quality control standards.
Architectural aluminum extrusions for curtain walls and window frames.
Appliance coatings for refrigerators, washing machines, and ovens.
General industrial metal finishing including office furniture and shelving systems.
Automotive non-under-hood components such as trim parts and brackets.
Outdoor metal structures requiring long-term UV stability and corrosion protection.
| Chemical Type | Solid saturated polyester resin |
| Product Form | Pale yellow to light amber free-flowing granules |
| Appearance | Homogeneous granular solid at room temperature |
| Acid Value (mg KOH/g) | 24–28 |
| Hydroxyl Value (mg KOH/g) | 16–20 |
| Melt Viscosity (mPa·s, 180 °C) | 3,500–4,500 |
| Glass Transition Temperature (°C, DSC) | 68–72 |
| Primary Applications | Thermosetting powder coatings (TGIC- and HAA-cured systems) |
Q1: What is the primary application area for DYNAPOL L850?
A: DYNAPOL L850 is primarily used as a reactive modifier or co-resin in high-performance powder coating formulations, especially where enhanced flexibility, impact resistance, and weather stability are required—such as in architectural and industrial metal finishing applications.
Q2: How does DYNAPOL L850 differ from conventional saturated polyester resins?
A: Unlike many standard saturated polyesters, DYNAPOL L850 is specifically engineered with a narrow molecular weight distribution and optimized acid value, delivering improved melt flow behavior, reduced viscosity during curing, and superior film formation without compromising crosslink density or chemical resistance.
Q3: Is DYNAPOL L850 compatible with common powder coating curing agents?
A: Yes, DYNAPOL L850 is fully compatible with standard epoxy-functional hardeners (e.g., glycidyl ester or triglycidyl isocyanurate types) and exhibits good reactivity across typical powder coating cure schedules (e.g., 180–200 °C for 10–20 minutes).
Q4: What handling precautions should be observed during storage and processing?
A: Store in a cool, dry place away from direct sunlight and heat sources. Due to its solid nature and moderate softening point, avoid prolonged exposure to elevated ambient temperatures during bulk handling to prevent particle agglomeration. Standard industrial dust control measures are recommended during milling or blending.
Q5: Can DYNAPOL L850 be used in food-contact compliant coatings?
A: DYNAPOL L850 is designed for performance-critical industrial coatings and is not pre-qualified for food-contact applications. Any use in such contexts requires full formulation-level regulatory assessment and compliance verification by the end-user according to applicable regional regulations.
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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
