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Waterborne polyester dispersion designed for high-performance, low-VOC industrial coatings.
Excellent hydrolytic stability and storage stability in aqueous systems.
Provides good film hardness, flexibility, and chemical resistance after crosslinking with melamine or blocked isocyanate curing agents.
Enables fast ambient or low-bake film formation with balanced drying characteristics.
Compatible with common waterborne acrylics, polyurethane dispersions, and pigment preparations.
Interior and exterior architectural metal coatings (e.g., aluminum composite panels, window frames).
Coil coating topcoats requiring excellent gloss retention and weathering performance.
General industrial maintenance coatings for machinery and equipment.
Prefinished wood and MDF coatings where low-odor, low-emission finishes are required.
Automotive non-critical plastic and trim coatings (e.g., interior components).
| Chemical Type | Waterborne polyester dispersion |
| Product Form | Opaque white to slightly yellow liquid |
| Appearance | Homogeneous, low-viscosity dispersion |
| Solids Content (wt%) | 40.0 ± 1.0 |
| pH (at 23 °C) | 7.5 – 8.5 |
| Viscosity (mPa·s, Brookfield RVT, #2 spindle, 20 rpm) | 100 – 300 |
| Particle Size (D50, nm) | 80 – 150 |
| Minimum Film Formation Temperature (MFFT, °C) | 25 – 30 |
Q1: What is the primary application area for DUROFTAL AQ-805?
A: DUROFTAL AQ-805 is a waterborne polyester resin specifically engineered for high-performance industrial coatings, particularly in coil and metal packaging applications where excellent film formation, corrosion resistance, and compatibility with crosslinkers like melamine formaldehyde are required.
Q2: Is DUROFTAL AQ-805 compatible with common waterborne crosslinking agents?
A: Yes, it is formulated to be compatible with standard amino resins (e.g., melamine-formaldehyde) and other water-dispersible crosslinkers typically used in baked industrial coating systems. Compatibility and cure performance should be verified under actual formulation and curing conditions.
Q3: How does DUROFTAL AQ-805 differ from solvent-borne polyester resins?
A: As a waterborne system, DUROFTAL AQ-805 offers reduced VOC content, improved workplace safety, and simplified regulatory compliance compared to traditional solvent-borne polyesters—without compromising key performance attributes such as hardness development, flexibility, and substrate adhesion on pretreated metals.
Q4: Can DUROFTAL AQ-805 be used in low-bake or ambient-cure formulations?
A: DUROFTAL AQ-805 is primarily designed for thermally cured systems, typically requiring bake temperatures above 140 °C. While modifications with alternative crosslinkers or catalysts may enable lower-temperature cure, such adaptations require thorough formulation testing and are not part of the standard recommendation.
Q5: What are key handling and storage considerations for this resin?
A: Store in tightly sealed containers at temperatures between 5 °C and 30 °C, away from freezing and direct sunlight. Avoid prolonged exposure to high humidity during handling, and ensure proper mixing before use to maintain homogeneity. Always follow standard industrial hygiene practices when working with waterborne polymer dispersions.
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E-mail: wangxingqiang@ericwchem.com
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