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High hydroxyl functionality for excellent crosslinking density with melamine and polyisocyanate curing agents.
Outstanding weatherability and UV resistance, ideal for high-performance exterior coatings.
Low viscosity in common organic solvents, enabling high-solids formulation flexibility and reduced VOC emissions.
Superior gloss retention and color stability after accelerated weathering (QUV and Xenon arc testing).
Good compatibility with other acrylics, alkyds, and polyester resins in hybrid coating systems.
Automotive OEM clearcoats and basecoats requiring exceptional durability and appearance.
Industrial maintenance coatings for architectural metal façades and cladding systems.
High-end coil coatings demanding superior formability, corrosion resistance, and long-term aesthetics.
Powder coating hybrids where solution-based acrylics enhance flow and surface finish.
Refinish coatings for premium automotive and heavy-duty equipment applications.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin in aromatic solvent blend |
| Appearance | Clear, pale yellow liquid |
| Hydroxyl Value (mg KOH/g) | 85–95 |
| Acid Value (mg KOH/g) | ≤ 5 |
| Solids Content (% by weight) | 50 ± 2 |
| Viscosity (DIN 4, 25°C, mPa·s) | 800–1,200 |
| Primary Applications | High-performance thermoset coatings (melamine & polyisocyanate-cured) |
Q1: What is the primary function of SETALUX 27-1316 in coating formulations?
A: SETALUX 27-1316 is a hydroxyl-functional acrylic resin designed primarily as a reactive binder in two-component polyurethane (2K PU) systems. It contributes to film formation, hardness development, and chemical resistance while enabling excellent gloss retention and weatherability.
Q2: Which types of isocyanates is SETALUX 27-1316 typically compatible with?
A: This resin is formulated for compatibility with common aliphatic isocyanate crosslinkers, including HDI-based trimer and biuret types. It is not recommended for use with aromatic isocyanates due to potential yellowing and reduced UV stability.
Q3: How does SETALUX 27-1316 perform in high-solids or low-VOC formulations?
A: Due to its relatively low viscosity and high solids content, SETALUX 27-1316 supports the design of high-solids 2K PU coatings. It enables formulators to reduce solvent demand without significantly compromising application properties or cure performance.
Q4: Can SETALUX 27-1316 be blended with other resins?
A: Yes — it exhibits good compatibility with other hydroxyl-functional acrylics, polyester polyols, and certain cellulose derivatives when used in carefully balanced formulations. Compatibility testing is recommended prior to full-scale integration to ensure colloidal stability and final film integrity.
Q5: What are key storage and handling considerations for this resin?
A: Store in tightly sealed containers under cool, dry conditions away from moisture and strong oxidizing agents. Prolonged exposure to humidity may affect reactivity; avoid freezing. Always refer to the Safety Data Sheet (SDS) for detailed handling, personal protective equipment, and emergency response guidance.
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