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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 VOC content compliant with stringent environmental regulations for industrial coatings.
Superior weathering resistance and UV stability in exterior applications.
Good compatibility with common solvent-borne acrylics, alkyds, and polyester resins.
Automotive OEM topcoats and clearcoats.
Industrial maintenance coatings for metal substrates.
General-purpose coil coatings requiring durability and gloss retention.
High-performance appliance finishes.
Refinish clearcoats for automotive and motorcycle applications.
| Chemical Type | Hydroxyl-functional acrylic resin |
| Product Form | Solvent-borne liquid |
| Appearance | Clear, pale yellow liquid |
| Primary Applications | OEM automotive, industrial maintenance, coil, and refinish coatings |
| Key Features | High OH value, low viscosity, excellent compatibility |
| Benefits | Enhanced cure efficiency, superior film hardness, and long-term gloss retention |
| Solvent System | Xylene / butyl acetate / ethyl acetate blend |
| Storage Stability | 12 months at 20–25°C in sealed containers |
Q1: What is the primary function of MACRYNAL SM 595 65X in coating formulations?
A: MACRYNAL SM 595 65X serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane (2K PU) and other crosslinking systems. It contributes to film formation, enhances hardness and chemical resistance, and supports excellent gloss retention and weatherability in high-performance industrial and automotive topcoats.
Q2: Is MACRYNAL SM 595 65X 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 and molecular architecture support efficient curing, good pot life, and balanced reactivity under standard ambient or forced-dry conditions.
Q3: How does this resin perform in terms of viscosity and solvent sensitivity?
A: MACRYNAL SM 595 65X is supplied as a medium-solids solution in aromatic-free or low-aromatic solvent blends, offering moderate viscosity suitable for conventional spray application. It exhibits good solubility in common esters, ketones, and glycol ethers, and demonstrates stable viscosity behavior across typical formulation pH and temperature ranges.
Q4: Can it be used in low-VOC or high-solids coating systems?
A: Yes — its relatively high non-volatile content and tailored molecular weight allow formulators to develop high-solids 2K PU coatings while maintaining acceptable application properties. It supports VOC reduction strategies when combined with appropriate crosslinkers and solvent selection, though final compliance depends on the full formulation.
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