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Excellent chemical resistance to solvents, acids, and alkalis in cured coatings.
High gloss retention and superior weatherability under UV exposure and humid conditions.
Low viscosity for easy handling, good flow-out, and compatibility with common crosslinkers (e.g., melamine formaldehyde).
Consistent batch-to-batch performance with tightly controlled acid value and molecular weight distribution.
Designed for high-solids coating systems, supporting VOC reduction without compromising film integrity.
Automotive OEM and refinish topcoats requiring durability and aesthetic performance.
General industrial metal coatings for appliances, HVAC units, and outdoor equipment.
Prefinished building panels and architectural cladding systems.
Coil coating primers and topcoats for steel and aluminum substrates.
High-performance powder coating formulations for functional and decorative finishes.
| Chemical Type | Saturated polyester resin |
| Product Form | Liquid, solvent-based |
| Appearance | Clear to pale yellow viscous liquid |
| Acid Value (mg KOH/g) | 12–16 |
| Hydroxyl Value (mg KOH/g) | 105–115 |
| Viscosity @ 25°C (mPa·s) | 4,000–6,000 |
| Solids Content (% by weight) | 60 ± 2 |
| Primary Applications | High-gloss, weather-resistant thermosetting coatings |
Q1: What is the primary application field for ETERKYD 5381-R-40?
A: ETERKYD 5381-R-40 is specifically formulated as a high-performance saturated polyester resin for coil coating systems, where excellent gloss retention, flexibility, and corrosion resistance are required after curing.
Q2: Is ETERKYD 5381-R-40 compatible with common crosslinkers used in coil coatings?
A: Yes — it is designed to react efficiently with melamine-formaldehyde resins and isothermal or low-bake amino crosslinkers, supporting standard industrial coil coating cure schedules.
Q3: How does ETERKYD 5381-R-40 perform under outdoor exposure conditions?
A: It delivers strong UV stability and weatherability due to its saturated backbone and optimized molecular structure, making it suitable for exterior-facing coil-coated metal substrates in architectural and appliance applications.
Q4: Can ETERKYD 5381-R-40 be used in high-solids or low-VOC formulations?
A: Yes — its controlled viscosity and reactivity profile support formulation into high-solids coil coating systems, helping formulators meet evolving VOC reduction targets without compromising film integrity.
Q5: What substrate types is ETERKYD 5381-R-40 typically applied to?
A: It is widely used on cold-rolled steel, galvanized steel, and aluminum substrates in continuous coil coating lines, offering good adhesion and intercoat compatibility across diverse pretreatment chemistries.
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E-mail: wangxingqiang@ericwchem.com
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