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High hydroxyl functionality for excellent crosslinking density with standard polyisocyanates.
Optimized molecular weight distribution for superior flow, leveling, and gloss development.
Low VOC formulation compliant with stringent environmental regulations (e.g., EU Solvent Emissions Directive).
Excellent compatibility with common acrylic, polyester, and cellulose ester co-resins.
Robust weather resistance and UV stability suitable for demanding exterior coatings.
Automotive OEM clearcoats and basecoats.
Industrial maintenance coatings for metal substrates.
High-performance coil coatings for architectural and appliance applications.
Premium refinish coatings requiring fast cure and high durability.
General-purpose two-component polyurethane topcoats for transportation equipment.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, pale yellow liquid |
| Solvent System | Xylene / butyl acetate blend |
| Hydroxyl Value (mg KOH/g) | 70–78 |
| Acid Value (mg KOH/g) | < 5 |
| Non-Volatile Content (% w/w) | 68–72 |
| Viscosity (25°C, mPa·s) | 4,000–6,000 (Brookfield RVT, spindle #3, 20 rpm) |
Q1: What is the primary function of Setalux 1255 SS-70 in coating formulations?
A: Setalux 1255 SS-70 serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane and polyester-based coating systems. It contributes to film formation, crosslink density, and enhances mechanical properties such as hardness, flexibility, and chemical resistance.
Q2: Is Setalux 1255 SS-70 compatible with common isocyanate crosslinkers?
A: Yes — it is specifically formulated for compatibility with aliphatic isocyanate crosslinkers, including HDI-based trimer and biuret types. Compatibility testing under actual formulation conditions is recommended to confirm reactivity profile and pot life requirements.
Q3: How does Setalux 1255 SS-70 support high-solids or low-VOC coating systems?
A: Its relatively low solution viscosity and balanced molecular weight distribution allow for higher solids content without excessive thickening, supporting VOC reduction strategies while maintaining application performance and film integrity.
Q4: What are typical storage and handling recommendations?
A: Store in tightly sealed containers in a cool, dry, well-ventilated area away from direct sunlight and ignition sources. Avoid prolonged exposure to moisture and ensure containers remain closed when not in use to prevent solvent loss or contamination.
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E-mail: wangxingqiang@ericwchem.com
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