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Waterborne aliphatic polyurethane dispersion offering excellent UV resistance and long-term gloss retention.
Low VOC formulation compliant with stringent environmental regulations including EU REACH and US EPA standards.
Good hydrolytic stability and storage stability at ambient temperature for up to 12 months in sealed containers.
Excellent compatibility with acrylic emulsions, crosslinkers (e.g., aziridines, carbodiimides), and pigment dispersions.
Provides superior flexibility, abrasion resistance, and chemical resistance to water, mild acids, and alkalis.
High-performance waterborne wood coatings for furniture, flooring, and interior joinery.
Industrial maintenance coatings for metal substrates requiring durability and aesthetic clarity.
Topcoats and clearcoats in automotive refinish and specialty vehicle applications.
Coatings for plastic substrates including ABS and PC where adhesion and flexibility are critical.
Architectural clear coatings for concrete, terrazzo, and decorative cementitious surfaces.
| Chemical Type | Aliphatic polyurethane dispersion |
| Product Form | White to slightly yellow liquid |
| Appearance | Opaque, homogeneous dispersion |
| Solids Content (wt%) | 35.0 ± 1.0 |
| pH | 7.8 – 8.5 |
| Viscosity (mPa·s, 23°C, Brookfield RVT, spindle #3, 20 rpm) | 150 – 400 |
| Density (g/cm³, 23°C) | 1.02 – 1.06 |
| Minimum Film Formation Temperature (MFFT) | ≈ 10°C |
Q1: What is the primary function of DAOTAN TW 6490/35WA in polyurethane coatings?
A: DAOTAN TW 6490/35WA is a waterborne polyurethane dispersion designed to serve as a film-forming binder or performance modifier—enhancing flexibility, scratch resistance, and low-temperature film formation in high-solids or solvent-reduced coating systems.
Q2: Is DAOTAN TW 6490/35WA compatible with common crosslinkers used in industrial PU systems?
A: Yes—it exhibits good compatibility with standard aliphatic isocyanate crosslinkers (e.g., HDI-based blocked or aqueous dispersions) and can be formulated alongside melamine resins or carbodiimides, depending on cure conditions and end-use requirements.
Q3: How should DAOTAN TW 6490/35WA be stored and handled to maintain stability?
A: Store in original sealed containers at temperatures between 5 °C and 30 °C, avoiding freezing and prolonged exposure to direct sunlight. Prior to use, stir gently to ensure homogeneity; do not dilute with hard water or highly acidic/basic solutions without prior compatibility testing.
Q4: Can DAOTAN TW 6490/35WA be used in combination with acrylic dispersions?
A: Yes—this resin is commonly blended with acrylic emulsions to balance cost, hardness, and elasticity. Compatibility should be verified through small-scale trials, especially regarding coalescence behavior, viscosity response, and final film integrity.
Q5: What are typical application methods for coatings based on this resin?
A: It is suitable for conventional industrial application techniques including airless spray, roll coating, curtain coating, and dip coating—particularly where low VOC content, rapid ambient drying, and good substrate wetting are required.
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