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High chemical resistance to solvents, acids, and alkalis in cured coatings.
Excellent weathering and UV stability for long-term outdoor performance.
Low viscosity enabling high solids content formulations with good flow and leveling.
Outstanding hardness and scratch resistance after crosslinking with melamine or urea resins.
Consistent batch-to-batch reproducibility meeting stringent industrial quality requirements.
Powder coatings for architectural aluminum profiles and façade systems.
High-performance coil coatings on pre-painted metal substrates.
Durable appliance coatings requiring gloss retention and color stability.
Industrial maintenance coatings for outdoor equipment and infrastructure.
Automotive non-critical exterior trim coatings demanding corrosion protection.
| Chemical Type | Saturated polyester resin |
| Product Form | Free-flowing white to off-white granules |
| Appearance | Homogeneous granular solid |
| Primary Applications | Powder coatings, coil coatings, industrial finishes |
| Key Features | High crosslink density, low melt viscosity, excellent film formation |
| Benefits | Enhanced durability, superior mechanical properties, reduced curing energy |
| Storage Stability | Stable under dry, cool conditions (≤25°C, <60% RH) |
| Recommended Crosslinker | Melamine-formaldehyde resins (e.g., Cymel® 303) |
Q1: What is the primary application area for DYNAPOL LH775-52?
A: DYNAPOL LH775-52 is a low-viscosity, high-reactivity saturated polyester resin designed primarily for use in high-performance powder coatings—especially for indoor architectural and general industrial applications requiring excellent flow, smooth appearance, and good mechanical resistance.
Q2: How does LH775-52 differ from other DYNAPOL polyester resins in terms of reactivity and curing profile?
A: LH775-52 exhibits enhanced reactivity compared to standard TGIC-curable polyesters, enabling faster cure at lower temperatures. It is optimized for use with conventional accelerators and shows good compatibility with common crosslinkers such as β-hydroxyalkylamide (HAA) systems, supporting flexible oven scheduling without compromising film integrity.
Q3: Is DYNAPOL LH775-52 suitable for weather-resistant outdoor coatings?
A: While LH775-52 delivers robust performance for interior and sheltered environments, it is not specifically formulated for long-term UV exposure or severe outdoor weathering. For exterior applications requiring high gloss retention and chalk resistance, Evonik recommends higher-UV-stable alternatives within the DYNAPOL portfolio.
Q4: What are the key handling and storage recommendations?
A: Store in original sealed containers in a cool, dry place away from direct sunlight and heat sources. Avoid prolonged exposure to moisture or elevated ambient temperatures during storage, as this may affect viscosity stability and shelf life. Always follow standard industrial hygiene practices when handling powdered or molten resin forms.
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