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High solids content for reduced VOC emissions and improved coating efficiency.
Excellent compatibility with acrylic and polyester resins in hybrid coating systems.
Outstanding flexibility and impact resistance without sacrificing hardness development.
Good hydrolytic stability suitable for humid-cure and ambient-cure applications.
Low viscosity enables easy handling, spray application, and formulation versatility.
Automotive refinish clearcoats and basecoat/clearcoat systems.
Industrial maintenance coatings for metal and plastic substrates.
General-purpose protective topcoats for furniture and architectural wood finishes.
Two-component (2K) polyurethane coatings requiring fast ambient cure and gloss retention.
Coatings for agricultural and construction equipment requiring abrasion and weather resistance.
| Chemical Type | Aliphatic polyurethane dispersion (anionic, waterborne) |
| Product Form | Liquid dispersion |
| Appearance | Translucent, slightly bluish-white liquid |
| Solids Content (wt%) | 30 ± 1% |
| pH | 7.5 – 8.5 |
| Viscosity (mPa·s, 25°C, Brookfield RVT, spindle #3, 20 rpm) | 150 – 350 |
| Density (g/cm³, 25°C) | 1.02 – 1.06 |
| Minimum Film Formation Temperature (MFFT) | ~15°C |
Q1: What is the primary function of DAOTAN TW 6450/30WA in polyurethane systems?
A: DAOTAN TW 6450/30WA is a water-dispersible polyurethane resin designed primarily as a coalescing aid and film-forming modifier in aqueous PU dispersions. It enhances interparticle fusion, improves mechanical integrity of dried films, and contributes to balanced hardness–flexibility performance without requiring organic co-solvents.
Q2: Is DAOTAN TW 6450/30WA compatible with common waterborne acrylic or hybrid PU-acrylic systems?
A: Yes, DAOTAN TW 6450/30WA exhibits good compatibility with a broad range of waterborne acrylic emulsions and hybrid PU-acrylic dispersions. Its anionic stabilization and low surface tension support stable blending and uniform film formation in multi-resin formulations.
Q3: How should DAOTAN TW 6450/30WA be incorporated into a formulation?
A: It is recommended to add DAOTAN TW 6450/30WA during the final stage of dispersion preparation, typically after neutralization and cooling. Stirring under moderate shear ensures homogeneous distribution. Dosage depends on formulation requirements but generally ranges from 0.1% to 2% by weight relative to total solids.
Q4: Does this resin require post-curing or thermal activation to achieve optimal properties?
A: While DAOTAN TW 6450/30WA enables ambient-temperature film formation, elevated drying temperatures (e.g., 60–80 °C) can accelerate coalescence and improve crosslink density development in reactive systems. No dedicated post-cure step is mandatory for basic film integrity.
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