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High hydroxyl functionality for excellent crosslinking efficiency with melamine and polyisocyanate curing agents.
Optimized molecular weight distribution for balanced flow, leveling, and film hardness development.
Low viscosity in high-solids formulations, enabling reduced VOC content without compromising application performance.
Superior UV resistance and long-term gloss retention in demanding exterior coatings.
Good compatibility with common acrylic, polyester, and cellulose ester resin systems.
Automotive OEM topcoats and clearcoats.
Industrial maintenance coatings for metal substrates.
High-performance coil coatings requiring excellent formability and weatherability.
Powder coating hybrids (liquid-powder hybrid systems).
Refinish clearcoats for automotive and heavy-duty equipment.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, pale yellow to colorless liquid |
| Solvent System | Standard aromatic-free solvent blend (e.g., xylene-free) |
| Hydroxyl Value (mg KOH/g) | 70–85 |
| Acid Value (mg KOH/g) | < 5 |
| Non-Volatile Content (% w/w) | 55–60 |
| Viscosity (mPa·s, 25°C) | 1,200–1,800 |
Q1: What is the primary function of SETALUX D A 265 BA in coating formulations?
A: SETALUX D A 265 BA serves as a hydroxyl-functional acrylic resin that acts as a reactive binder in two-component polyurethane and polyester-based systems. It contributes to film formation, crosslink density, and final coating performance—including hardness, flexibility, and chemical resistance—when reacted with suitable isocyanate curing agents.
Q2: Is SETALUX D A 265 BA compatible with common aliphatic isocyanate hardeners?
A: Yes, it is specifically designed for compatibility with standard aliphatic polyisocyanates such as HDI-based trimer and biuret hardeners. Its hydroxyl functionality and molecular architecture support efficient crosslinking and stable pot life under typical ambient and forced-dry conditions.
Q3: How does SETALUX D A 265 BA contribute to weatherability and gloss retention?
A: As a high-purity, low-yellowing acrylic backbone resin, it provides excellent UV stability and resistance to chalking or fading. When fully cured in aliphatic PU systems, it helps maintain high initial gloss and long-term aesthetic performance in exterior architectural and industrial maintenance coatings.
Q4: Can this resin be used in low-VOC or high-solids coating systems?
A: Yes, SETALUX D A 265 BA is formulated for use in medium-to-high solids solventborne systems. Its viscosity and solubility profile allow formulators to achieve target solids levels while maintaining good application properties and flow-out—supporting compliance with evolving VOC regulations without requiring major reformulation.
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