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High chemical resistance to solvents, acids, and alkalis for durable coating performance.
Excellent gloss retention and color stability under UV exposure and weathering conditions.
Low viscosity enables easy formulation with high solids content and reduced VOC emissions.
Superior hardness and flexibility balance, supporting both impact resistance and substrate adhesion.
Compatible with melamine formaldehyde crosslinkers for ambient or forced-dry thermoset curing systems.
Automotive OEM and refinish topcoats requiring high-gloss, chip-resistant finishes.
Industrial maintenance coatings for metal furniture, agricultural equipment, and HVAC components.
Powder coating formulations for architectural aluminum extrusions and façade systems.
Can coatings for beverage and food containers demanding FDA-compliant cured film integrity.
General-purpose coil coatings for pre-painted steel used in building panels and appliances.
| Chemical Type | Saturated polyester resin (carboxyl-functional) |
| Product Form | Clear to pale yellow viscous liquid |
| Appearance | Homogeneous, transparent, free of gel or sediment |
| Acid Value (mg KOH/g) | 48–54 |
| Hydroxyl Value (mg KOH/g) | 12–16 |
| Viscosity (mPa·s at 25°C) | 3,500–5,000 |
| Non-Volatile Content (% by weight) | 62–66 |
| Solvent System | Xylene/butyl acetate blend |
Q1: What is the primary application area for ETERKYD 5055-R-65-3?
A: ETERKYD 5055-R-65-3 is a high-performance saturated polyester resin specifically designed for use in thermosetting coil coating systems, where excellent flow, gloss retention, and post-forming flexibility are required.
Q2: Is this resin suitable for food-contact metal coatings?
A: While ETERKYD 5055-R-65-3 is formulated to meet general regulatory expectations for incidental food contact in baked-on metal coatings, final compliance depends on full system formulation, cure conditions, and applicable regional regulations — users must conduct appropriate migration and safety testing for their specific end-use application.
Q3: How does ETERKYD 5055-R-65-3 perform in terms of chemical resistance after curing?
A: When fully cured in a standard coil coating process, this resin delivers robust resistance to common industrial cleaners, weak acids and alkalis, and aliphatic solvents — performance against strong oxidizers or aromatic hydrocarbons may be limited and should be verified under actual service conditions.
Q4: What type of crosslinkers is ETERKYD 5055-R-65-3 typically used with?
A: This resin is optimized for use with melamine-formaldehyde crosslinkers, particularly high-alkylated types, and demonstrates good compatibility with blocked isocyanate co-curing agents in hybrid systems requiring enhanced flexibility or durability.
Q5: Does the resin require special handling or storage precautions?
A: Yes — store in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and heat sources; avoid prolonged exposure to moisture or ambient humidity above 70% RH to prevent viscosity increase or gelation over time.
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E-mail: wangxingqiang@ericwchem.com
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