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High hydroxyl functionality for excellent crosslink density with melamine and polyisocyanate curing agents.
Low VOC content, supporting compliance with stringent environmental and regulatory requirements.
Superior gloss retention and UV resistance in demanding exterior coating applications.
Excellent compatibility with common solvent-based acrylics, alkyds, and polyester resins.
Good flow and leveling characteristics for high-appearance industrial and automotive topcoats.
Automotive OEM and refinish topcoats.
Industrial maintenance coatings for metal substrates.
General-purpose coil coatings requiring weatherability and hardness.
High-performance can and coil coatings for food and beverage packaging.
Architectural metal cladding and façade coatings.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear to slightly yellow viscous liquid |
| Solvent System | Aromatic hydrocarbons and esters (e.g., xylene, butyl acetate) |
| Hydroxyl Value (mg KOH/g) | 125–135 |
| Acid Value (mg KOH/g) | < 5 |
| Non-Volatile Content (% w/w) | 50 ± 2 |
| Viscosity (25°C, mPa·s) | 4,000–6,000 (Brookfield, spindle #4, 20 rpm) |
Q1: What is the primary function of SETALUX 50-1302 in coating formulations?
A: SETALUX 50-1302 is a hydroxyl-functional acrylic resin designed primarily as a reactive binder in two-component polyurethane and polyester-based systems. It contributes to film formation, crosslink density, and enhances mechanical properties such as hardness, flexibility, and chemical resistance.
Q2: Is SETALUX 50-1302 compatible with common isocyanate crosslinkers?
A: Yes, it is formulated for compatibility with standard aliphatic and aromatic polyisocyanates, including HDI trimer and IPDI-based crosslinkers. Optimal performance is achieved when matched with isocyanates offering appropriate reactivity and steric profile for the intended cure schedule and application method.
Q3: How does SETALUX 50-1302 perform in high-solids or low-VOC formulations?
A: This resin exhibits favorable solution viscosity and solids content characteristics, supporting formulators in developing high-solids coatings with reduced VOC emissions. Its molecular architecture helps maintain flow and leveling while enabling efficient crosslinking at lower solvent levels.
Q4: Can SETALUX 50-1302 be used in UV-curable hybrid systems?
A: While not inherently UV-reactive, SETALUX 50-1302 can be incorporated into dual-cure (thermal/UV) hybrid systems where thermal curing of the hydroxyl-isocyanate reaction complements UV polymerization of acrylate components—subject to careful formulation and compatibility testing.
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