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High hydroxyl functionality for excellent crosslink density with melamine and polyisocyanate curing agents.
Optimized molecular weight distribution delivering balanced flow, leveling, and film hardness.
Low volatile organic compound (VOC) content, supporting compliance with stringent environmental regulations.
Excellent compatibility with common solvent-borne acrylic and polyester resins in hybrid systems.
Good storage stability in sealed containers under recommended conditions (≤30 °C, dry environment).
Automotive OEM clearcoats and basecoats requiring high gloss and durability.
Industrial maintenance coatings for metal substrates, including agricultural and construction equipment.
General-purpose coil coatings where flexibility, corrosion resistance, and bake performance are critical.
Powder coating hybrids and low-bake liquid systems targeting energy-efficient curing profiles.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin in aromatic solvent blend |
| Appearance | Clear, pale yellow to colorless liquid |
| Hydroxyl Value (mg KOH/g) | 70–78 |
| Acid Value (mg KOH/g) | < 5 |
| Solids Content (% by weight) | 60–64 |
| Viscosity (mPa·s, 25 °C, Brookfield RV-DV2T, spindle #3, 20 rpm) | 4,000–7,000 |
| Density (g/cm³, 25 °C) | 0.97–1.01 |
Q1: What is the primary function of SETALUX 1772 VB-70 in coating formulations?
A: SETALUX 1772 VB-70 is a hydroxyl-functional acrylic resin designed to serve as a reactive binder in two-component polyurethane and polyester-based systems. It contributes to film formation, enhances crosslink density, and supports key performance attributes such as hardness development, chemical resistance, and gloss retention.
Q2: Is SETALUX 1772 VB-70 compatible with common isocyanate hardeners?
A: Yes — it is formulated for compatibility with standard aliphatic and aromatic isocyanate crosslinkers, including HDI trimer, IPDI biuret, and TDI-based hardeners. Optimal reactivity and pot life depend on the specific hardener selection, catalyst use, and formulation solids level.
Q3: How should SETALUX 1772 VB-70 be stored to maintain stability?
A: Store in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and sources of heat or ignition. Under recommended conditions, shelf life is typically 12 months from date of manufacture. Avoid prolonged exposure to moisture or freezing temperatures.
Q4: Can this resin be used in high-solids or low-VOC coating systems?
A: Yes — SETALUX 1772 VB-70 exhibits favorable solution viscosity and solubility in common oxygenated and aromatic solvents, supporting its use in medium-to-high solids formulations. Its molecular design allows for VOC reduction strategies without significant compromise in flow, leveling, or cure response.
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