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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 for high-gloss, smooth-finish architectural and industrial powder coatings.
Low melt viscosity enables excellent flow and leveling during curing.
Consistent batch-to-batch performance supporting reliable manufacturing scale-up.
Architectural aluminum extrusion coatings (e.g., window frames, façade systems).
Appliance coatings for refrigerators, washing machines, and ovens.
General industrial metal finishing requiring durable, decorative finishes.
Outdoor furniture and garden equipment coatings demanding UV stability.
Automotive non-critical exterior components (e.g., trim, brackets, housings).
| Chemical Type | Solid saturated polyester resin |
| Product Form | Pale yellow to light amber granules |
| Appearance | Free-flowing granular solid |
| Acid Value (mg KOH/g) | 28–34 |
| Gardner Color (50% w/w solution in xylene) | ≤ 3 |
| Melt Viscosity (180 °C, Pa·s) | 1.5–2.5 |
| Softening Point (°C, Ring & Ball) | 72–78 |
| Primary Applications | Thermosetting powder coatings for architectural and industrial use |
Q1: What is the primary application domain for DYNAPOL L490?
A: DYNAPOL L490 is primarily designed for use in high-performance powder coatings, especially where excellent flow, leveling, and mechanical durability are required—such as in architectural, appliance, and general industrial coating systems.
Q2: How does DYNAPOL L490 differ from unsaturated polyester resins commonly used in powder coatings?
A: Unlike unsaturated polyesters, DYNAPOL L490 is a solid saturated polyester resin with no reactive double bonds. This imparts superior UV stability, reduced yellowing upon thermal aging, and enhanced chemical resistance—making it suitable for both indoor and outdoor applications where long-term gloss and color retention are critical.
Q3: Is DYNAPOL L490 compatible with standard epoxy-based curing agents?
A: Yes, DYNAPOL L490 is formulated to be compatible with conventional epoxy-functional crosslinkers such as glycidyl ester or triglycidyl isocyanurate (TGIC-free) systems. It delivers balanced reactivity and storage stability in two-component powder formulations.
Q4: What handling precautions should be observed during processing?
A: As a fine solid resin, DYNAPOL L490 should be handled in well-ventilated areas to avoid dust accumulation. Standard industrial hygiene practices apply—including the use of appropriate PPE (e.g., respirators for dust control) and avoidance of prolonged skin contact. Thermal decomposition may occur above typical cure temperatures, so processing should remain within recommended extrusion and curing windows.
Q5: Can DYNAPOL L490 support low-cure or energy-efficient powder coating processes?
A: Yes—DYNAPOL L490 exhibits good reactivity at reduced temperatures, enabling formulation of powders suitable for low-bake cycles (e.g., 160–180 °C). Its molecular design supports efficient crosslinking without requiring extended dwell times, supporting sustainability goals related to energy reduction.
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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
