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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 regulations including EU Directive 2004/42/EC.
Outstanding gloss retention and UV resistance in outdoor-cured and weather-exposed coatings.
Good compatibility with common solventborne acrylics, alkyds, and polyester resins.
Optimized molecular weight distribution for balanced flow, leveling, and film hardness development.
Automotive OEM topcoats and clearcoats.
Industrial maintenance coatings for metal substrates.
General-purpose coil coating systems.
Powder coating hybrid formulations (when blended with appropriate polyesters).
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, pale yellow to colorless liquid |
| Solvent System | Aromatic hydrocarbons and esters (e.g., xylene, butyl acetate) |
| Hydroxyl Value (mg KOH/g) | 85–95 |
| Acid Value (mg KOH/g) | < 5 |
| Non-Volatile Content (% w/w) | 50 ± 2 |
| Viscosity (DIN 4, 23°C, mPa·s) | 2,500–3,500 |
Q1: What is the primary function of SETALUX 27-1550 in coating formulations?
A: SETALUX 27-1550 serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane (2K PU) and polyester-based crosslinking systems. It contributes to film formation, enhances hardness and chemical resistance, and supports excellent gloss retention and weatherability in high-performance topcoats.
Q2: Is SETALUX 27-1550 compatible with common isocyanate crosslinkers?
A: Yes, it is formulated for compatibility with standard aliphatic isocyanate crosslinkers—including HDI trimer and biuret types—enabling robust cure performance at ambient or elevated temperatures. Compatibility and pot life should be verified experimentally within the specific formulation matrix.
Q3: How does SETALUX 27-1550 perform in terms of UV stability and outdoor durability?
A: As a fully acrylic hydroxyl resin with no aromatic content, it delivers strong inherent UV resistance and long-term gloss and color retention under outdoor exposure—making it well-suited for premium automotive refinish, industrial maintenance, and architectural coatings requiring extended service life.
Q4: What solvents are typically recommended for diluting SETALUX 27-1550?
A: It exhibits good solubility in common organic solvents such as xylene, toluene, mineral spirits, acetates (e.g., butyl acetate), and ketones (e.g., methyl isobutyl ketone). Solvent selection should consider evaporation rate, VOC compliance, and compatibility with other formulation components.
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