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High chemical resistance to solvents, acids, and alkalis in cured coatings.
Excellent weathering stability and UV resistance for long-term outdoor performance.
Good flexibility combined with high hardness after crosslinking with melamine or urea resins.
Low viscosity enabling high-solids formulations and improved application properties.
Consistent batch-to-batch reproducibility meeting stringent quality control standards.
Automotive OEM clearcoats and topcoats requiring gloss retention and chip resistance.
Industrial maintenance coatings for metal substrates exposed to harsh environments.
Powder coating systems for architectural aluminum profiles and façade components.
General-purpose coil coating primers and topcoats for pre-painted steel sheets.
| Chemical Type | Saturated polyester resin |
| Product Form | Liquid (solvent-based) |
| Appearance | Clear, pale yellow liquid |
| Primary Applications | Thermosetting coatings (crosslinked with amino resins) |
| Key Features | High crosslink density, low VOC potential, excellent flow & leveling |
| Benefits | Enhanced durability, superior gloss and color retention, efficient curing |
| Recommended Cure Conditions | 140–160 °C for 15–30 minutes |
Q1: What is the primary application area for DYNAPOL LH 820?
A: DYNAPOL LH 820 is specifically designed as a low-viscosity, high-reactivity saturated polyester resin for use in thermosetting powder coatings—particularly where excellent flow, leveling, and mechanical performance are required in architectural, appliance, and general industrial finishes.
Q2: How does DYNAPOL LH 820 differ from standard TGIC-cured polyester resins?
A: Unlike conventional TGIC-based systems, DYNAPOL LH 820 is formulated for compatibility with alternative crosslinkers such as β-hydroxyalkyl amides (HAA), offering improved storage stability and reduced risk of yellowing during curing—while maintaining robust chemical resistance and gloss retention.
Q3: Is DYNAPOL LH 820 suitable for outdoor applications?
A: Yes—DYNAPOL LH 820 delivers good UV stability and weather resistance when properly formulated and cured, making it appropriate for exterior-grade powder coatings used on façades, window frames, and outdoor furniture.
Q4: What are the recommended storage conditions?
A: Store in original sealed containers in a cool, dry place below 30 °C, protected from moisture and direct sunlight. Prolonged exposure to elevated temperatures or humidity may affect reactivity and shelf life.
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E-mail: wangxingqiang@ericwchem.com
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