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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 hardness development.
Low viscosity in solvent-based systems, enabling high-solids formulations without sacrificing application performance.
Exceptional UV resistance and long-term gloss retention in outdoor coating applications.
Good compatibility with common acrylic, polyester, and cellulose ester resins used in industrial coatings.
Automotive OEM topcoats and clearcoats.
Industrial maintenance coatings for metal substrates.
General-purpose coil coatings requiring durability and weatherability.
High-performance plastic coatings for automotive interior and exterior trim.
Powder coating hybrids where liquid acrylics are blended into thermoset powder systems.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear to slightly hazy, pale yellow liquid |
| Solvent System | Xylene / butyl acetate blend |
| Non-Volatile Content (wt%) | 65 ± 1 % |
| Hydroxyl Value (mg KOH/g) | 120–135 |
| Acid Value (mg KOH/g) | < 5 |
| Viscosity (25°C, mPa·s) | 800–1,200 (Brookfield RVT, spindle #3, 20 rpm) |
Q1: What is the primary function of SETALUX 1252 SS-65 in coating formulations?
A: SETALUX 1252 SS-65 is a hydroxyl-functional acrylic resin designed to serve as a reactive binder in two-component polyurethane (2K PU) and polyester-based crosslinking systems. It contributes to film formation, enhances hardness development, improves chemical resistance, and supports excellent gloss retention and clarity in high-performance topcoats.
Q2: Is SETALUX 1252 SS-65 compatible with common isocyanate crosslinkers?
A: Yes, this resin is specifically engineered for compatibility with aliphatic isocyanate crosslinkers, including HDI-based trimer and biuret types. It exhibits good pot life stability and reactivity balance in ambient- or forced-dry 2K PU systems used in industrial and automotive refinish applications.
Q3: How does SETALUX 1252 SS-65 perform in terms of weathering and UV stability?
A: As a purely acrylic hydroxyl resin with no aromatic content, it offers inherently strong resistance to UV degradation and yellowing. This makes it well-suited for exterior applications requiring long-term gloss retention, color stability, and resistance to chalking under prolonged sunlight exposure.
Q4: Can SETALUX 1252 SS-65 be blended with other resins to modify performance?
A: Yes, it is commonly blended with other hydroxyl-functional resins—such as polyester or melamine-modified acrylics—to fine-tune flexibility, cure speed, hardness, or solvent release behavior. Compatibility testing is recommended for each specific blend ratio and formulation matrix.
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