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Low-VOC, water-based formulation compliant with stringent environmental regulations including EPA and EU REACH.
Excellent adhesion to metals, concrete, and primed substrates without requiring solvent-based primers.
Good pot life stability when mixed with compatible amine hardeners—enabling consistent application in industrial coating lines.
Enhanced film flexibility and impact resistance compared to conventional solvent-borne epoxy systems.
Reduced flammability hazard during storage, handling, and application due to aqueous dispersion nature.
Industrial maintenance coatings for steel structures and infrastructure.
Waterborne primer for automotive OEM and aftermarket metal finishing.
High-performance floor coatings in food processing, pharmaceutical, and cleanroom facilities.
Corrosion-resistant linings for water storage tanks and piping systems.
Base resin for high-solids, low-emission protective coatings used in marine and offshore applications.
| Chemical Type | Bisphenol-A based waterborne epoxy dispersion |
| Product Form | Aqueous dispersion (non-ionic stabilized) |
| Appearance | Opaque white to off-white liquid |
| Solids Content (wt%) | 50–53% |
| pH (at 25°C) | 7.0–8.5 |
| Viscosity (mPa·s, Brookfield, #2 spindle, 20 rpm, 25°C) | 1,200–2,500 |
| Density (g/cm³, 25°C) | 1.02–1.05 |
| Free Bisphenol-A (ppm) | <10 |
Q1: What are the primary advantages of using Dow DER 909G over solvent-based epoxy resins?
A: Dow DER 909G offers reduced VOC content, improved workplace safety, and simplified handling due to its waterborne nature. It enables formulators to meet increasingly stringent environmental regulations without compromising film integrity, adhesion, or chemical resistance in protective coatings and industrial maintenance applications.
Q2: Is Dow DER 909G compatible with common amine-based curing agents used in waterborne systems?
A: Yes — Dow DER 909G is specifically designed for use with water-dispersible or water-soluble amine hardeners, including modified polyamines and polyamide dispersions. Compatibility and pot life should be verified experimentally, as performance depends on pH, ionic strength, and mixing protocol.
Q3: How does the film formation behavior of Dow DER 909G compare to conventional epoxy dispersions?
A: Dow DER 909G exhibits good coalescence and film continuity under typical ambient or moderate-bake conditions. Its particle size distribution and surfactant system support uniform film formation with low haze, enhanced gloss retention, and reduced sensitivity to flash-off conditions compared to some earlier-generation waterborne epoxies.
Q4: Can Dow DER 909G be used in direct-to-metal (DTM) coating formulations?
A: Yes — it is commonly employed in DTM primers and mid-coats where corrosion inhibition, adhesion to steel or aluminum substrates, and compatibility with pigments and inhibitors are critical. Performance depends on proper formulation design, including selection of rust-inhibitive pigments and optimized cure schedule.
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E-mail: wangxingqiang@ericwchem.com
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