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High hydroxyl functionality for excellent crosslink density with melamine and polyisocyanate curing agents.
Optimized molecular weight distribution for balanced flow, leveling, and film build in high-solids coatings.
Low VOC formulation compatible with stringent environmental regulations and sustainable coating systems.
Superior UV resistance and gloss retention in exterior architectural and automotive refinish applications.
Good compatibility with common acrylic, polyester, and cellulose ester resins in multi-resin binder systems.
Automotive OEM clearcoats and basecoats requiring high durability and aesthetic performance.
Industrial maintenance coatings for metal substrates exposed to harsh weather and chemical environments.
Architectural coil and extrusion coatings demanding excellent flexibility and corrosion resistance.
Refinish clearcoats where rapid cure, low-temperature baking, and high-gloss finish are critical.
Plastic coatings for automotive interior trim requiring adhesion, flexibility, and low-temperature cure.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, colorless to pale yellow liquid |
| Solvent System | Aromatic-free (proprietary ketone/alcohol blend) |
| Hydroxyl Value (mg KOH/g) | 78–84 |
| Acid Value (mg KOH/g) | < 5 |
| Non-Volatile Content (%) | 55 ± 1 |
| Viscosity (DIN 4, 23°C, mPa·s) | 3,000–4,500 |
Q1: What is the primary function of SETALUX 1159 SS-55 in coating formulations?
A: SETALUX 1159 SS-55 serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane and polyester-based crosslinking systems. It contributes to film formation, enhances hardness and chemical resistance, and supports excellent gloss and clarity in high-performance topcoats.
Q2: Is SETALUX 1159 SS-55 compatible with common isocyanate crosslinkers?
A: Yes — it is specifically formulated for compatibility with aliphatic isocyanate crosslinkers, including HDI-based trimer and biuret types. Its hydroxyl functionality enables efficient urethane bond formation under standard curing conditions, supporting robust film development without excessive pot life reduction.
Q3: How does SETALUX 1159 SS-55 perform in terms of weathering and UV resistance?
A: As a purely acrylic, aliphatic hydroxyl resin, it offers inherently strong UV stability and resistance to chalking or yellowing. When cured with aliphatic isocyanates, it delivers long-term gloss retention and color stability in exterior architectural and automotive refinish applications.
Q4: Can SETALUX 1159 SS-55 be used in low-VOC or solvent-reduced systems?
A: Yes — it is supplied in aromatic-free, low-viscosity solvents and is well-suited for formulating with reduced aromatic content. Its moderate polarity and controlled molecular weight support good solubility in ester- and ketone-based blends, facilitating VOC-compliant coating designs without sacrificing flow or leveling.
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