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Medium molecular weight for balanced flow control and film formation in thermoset coatings.
Highly saturated backbone ensures excellent hydrolytic stability and UV resistance.
Low acid value enables compatibility with melamine-formaldehyde crosslinkers without excessive catalyst demand.
Consistent batch-to-batch reproducibility meeting stringent automotive and industrial coating standards.
Optimized for high-gloss, low-temperature-cure powder and liquid coil coating systems.
Powder coatings for architectural aluminum extrusions.
Coil coatings for pre-painted metal roofing and wall panels.
Automotive clearcoats and basecoat binders requiring weatherability and chemical resistance.
Industrial maintenance coatings for agricultural and construction equipment.
General-purpose thermosetting decorative finishes on metal substrates.
| Chemical Type | Saturated polyester resin |
| Product Form | Flake or granular solid |
| Appearance | White to off-white homogeneous flakes |
| Acid Value (mg KOH/g) | 20–26 |
| Hydroxyl Value (mg KOH/g) | 15–22 |
| Gardner Color | ≤ 3 |
| Softening Point (°C, Ring & Ball) | 72–78 |
| Volatile Content (% wt, 120°C/2h) | ≤ 0.5 |
Q1: What is the primary application of DYNAPOL LH818-05N in powder coatings?
A: DYNAPOL LH818-05N is specifically designed as a binder resin for high-performance TGIC-free and HAA-cured polyester powder coatings, offering excellent flow, leveling, and mechanical resistance — particularly suited for architectural and general industrial metal finishing.
Q2: How does the medium molecular weight of LH818-05N influence its processing and film formation?
A: Its medium molecular weight contributes to balanced melt viscosity during extrusion and curing, supporting good powder stability, efficient dispersion of additives, and robust crosslinking density without excessive brittleness or tackiness in the final film.
Q3: Is DYNAPOL LH818-05N compatible with common crosslinkers used in polyester powder systems?
A: Yes — it is formulated for reliable reactivity with standard hydroxyalkyl amide (HAA) crosslinkers and also demonstrates good compatibility with alternative low-VOC crosslinking systems, including certain blocked isocyanates and epoxy-functional co-resins, subject to formulation optimization.
Q4: What are the recommended storage conditions to maintain resin integrity?
A: Store in original sealed packaging at temperatures between 10 °C and 30 °C, away from direct sunlight and sources of moisture or contamination. Prolonged exposure to high humidity or elevated temperatures may affect flow behavior and shelf life.
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