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Waterborne polyester dispersion offering excellent film formation and gloss retention.
Low VOC formulation compliant with stringent environmental regulations for industrial coatings.
Good compatibility with acrylic and epoxy dispersions for hybrid coating systems.
Enhanced hydrolytic stability enabling extended shelf life and robust processing performance.
Enables high crosslink density with melamine or blocked isocyanate hardeners for superior chemical resistance.
Industrial maintenance coatings for metal substrates.
General-purpose waterborne coil coatings.
Interior architectural metal coatings (e.g., HVAC, lighting fixtures).
Electrodeposition primer topcoats in multi-layer automotive component systems.
Pre-treatment and topcoat systems for aluminum extrusions.
| Chemical Type | Waterborne saturated polyester dispersion |
| Product Form | Opaque white liquid |
| Appearance | Homogeneous milky dispersion |
| pH (25 °C) | 7.5 – 8.5 |
| Solids Content (wt%) | 40 ± 1 |
| Viscosity (mPa·s, Brookfield RVT, Spindle #2, 2 rpm) | 150 – 350 |
| Density (g/cm³, 25 °C) | 1.02 – 1.06 |
| Minimum Film Formation Temperature (MFFT) | ≈ 25 °C |
Q1: What is the primary application area for DUROFTAL AQ-803?
A: DUROFTAL AQ-803 is a waterborne polyester resin specifically developed for high-performance, low-VOC industrial coatings—particularly coil and metal packaging coatings where excellent corrosion resistance, flexibility, and adhesion to pretreated metals are required.
Q2: Is DUROFTAL AQ-803 compatible with common crosslinkers used in aqueous systems?
A: Yes, it is formulated to be compatible with standard melamine-formaldehyde resins and alternative formaldehyde-free crosslinkers such as blocked polyisocyanates, enabling formulation flexibility for both ambient-cure and thermal-cure applications.
Q3: How does DUROFTAL AQ-803 contribute to film formation and substrate adhesion?
A: Its tailored molecular architecture promotes coalescence in waterborne films and strong interfacial interaction with zinc- or chrome-passivated steel substrates, resulting in robust dry-film integrity and excellent resistance to chipping and underfilm corrosion.
Q4: Can DUROFTAL AQ-803 be used in formulations targeting food-contact compliance?
A: While DUROFTAL AQ-803 itself is not pre-certified for food contact, its composition avoids intentionally added heavy metals or regulated plasticizers; final compliance depends on full formulation evaluation against applicable regional regulatory frameworks.
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E-mail: wangxingqiang@ericwchem.com
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