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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 and interior joinery.
Industrial maintenance coatings for metal substrates requiring durability and low environmental impact.
Coatings for plastic substrates including ABS and PC where adhesion and clarity are critical.
Leather finishing topcoats delivering soft touch, breathability, and scuff resistance.
Waterborne overprint varnishes for packaging applications demanding FDA-compliant formulations.
| Chemical Type | Aliphatic waterborne polyurethane dispersion |
| Product Form | Liquid dispersion |
| Appearance | Opaque white to slightly bluish liquid |
| Solids Content (wt%) | 33 ± 1% |
| pH | 7.5 – 8.5 |
| Viscosity (mPa·s, Brookfield RVT, spindle #2, 20 rpm, 25°C) | 100 – 300 |
| Particle Size (nm, D50) | 80 – 120 |
| Minimum Film Formation Temperature (MFFT) | ≈ 15°C |
Q1: What is the primary function of DAOTAN TW 6491/33WA in polyurethane systems?
A: DAOTAN TW 6491/33WA is a waterborne polyurethane dispersion designed to serve as a film-forming binder or performance modifier—enhancing flexibility, abrasion resistance, and substrate adhesion in coatings, inks, and sealants.
Q2: Is DAOTAN TW 6491/33WA compatible with common crosslinkers used in industrial PU coatings?
A: Yes, it is formulated to be compatible with standard aqueous or blocked isocyanate crosslinkers, as well as carbodiimide or aziridine-based systems—compatibility should always be verified in the final formulation under intended processing conditions.
Q3: How does DAOTAN TW 6491/33WA perform in terms of drying behavior and film formation?
A: It exhibits good coalescence at ambient temperatures and forms continuous, flexible films without requiring high-temperature curing; drying time and film quality are influenced by humidity, film thickness, and substrate porosity.
Q4: Can DAOTAN TW 6491/33WA be blended with other polymer dispersions such as acrylics or styrene-acrylics?
A: Yes, it is generally miscible with many anionic and non-ionic aqueous polymer dispersions; however, physical stability and long-term compatibility should be assessed via storage testing and shear evaluation before full-scale implementation.
Q5: What safety and handling precautions should be observed during routine use?
A: As a waterborne system, it presents low VOC and minimal flammability risk; standard industrial hygiene practices apply—including adequate ventilation, skin protection, and avoidance of prolonged eye contact. Refer to the Safety Data Sheet for detailed handling guidance.
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E-mail: wangxingqiang@ericwchem.com
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