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High hydroxyl functionality for excellent crosslinking density with melamine and polyisocyanate curing agents.
Low VOC formulation compliant with stringent environmental regulations for industrial coatings.
Superior weather resistance and UV stability, enabling long-term gloss retention and color stability.
Excellent compatibility with common solvent-based resins and additives used in high-performance topcoats.
Good flow and leveling characteristics for smooth, defect-free film formation.
Automotive OEM clearcoats and basecoats.
Industrial maintenance coatings for metal and plastic substrates.
General-purpose coil coatings requiring durability and corrosion resistance.
Powder coating hybrid systems where solution acrylics enhance film integrity.
High-gloss appliance finishes demanding scratch resistance and chemical resistance.
| Chemical Type | Hydroxyl-functional acrylic resin |
| Product Form | Liquid solution in aromatic hydrocarbons (e.g., xylene, Solvesso™) |
| Appearance | Clear, colorless to pale yellow liquid |
| Hydroxyl Value (mg KOH/g) | 53–57 |
| Solids Content (% by weight) | 50 ± 1 |
| Acid Value (mg KOH/g) | < 5 |
| Viscosity (mPa·s at 25°C, Brookfield RVT, spindle #3, 20 rpm) | 400–600 |
| Primary Applications | High-performance solventborne thermoset coatings |
Q1: What is the primary function of MACRYNAL SM 507 53XBAC in coating formulations?
A: MACRYNAL SM 507 53XBAC serves as a hydroxyl-functional acrylic resin designed to act 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 this resin compatible with common isocyanate curing agents?
A: Yes, it is formulated for compatibility with standard aliphatic and aromatic isocyanate crosslinkers, including HDI-based trimer and biuret types. Optimal reactivity and pot life depend on catalyst selection, NCO:OH ratio, and ambient conditions.
Q3: How does MACRYNAL SM 507 53XBAC perform in high-solids or low-VOC formulations?
A: Its relatively low viscosity and high hydroxyl value support formulation flexibility in medium- to high-solids systems. It enables reduced solvent demand while maintaining good flow, leveling, and crosslink efficiency — making it suitable for evolving regulatory and sustainability requirements.
Q4: Can this resin be used in automotive refinish or industrial maintenance coatings?
A: Yes — it is commonly employed in demanding applications such as automotive refinish clearcoats and industrial maintenance topcoats where balanced cure speed, gloss retention, and long-term durability are critical. Performance validation should be conducted within the final formulation and application process.
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