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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 high-solids formulation—enables VOC-compliant coatings without sacrificing application performance.
Superior UV resistance and long-term gloss retention in outdoor durable applications.
Good compatibility with common acrylic, polyester, and cellulose ester resins for hybrid binder systems.
Automotive OEM topcoats and clearcoats requiring high DOI and weatherability.
Industrial maintenance coatings for metal substrates exposed to harsh environments.
General-purpose coil coatings where flexibility, corrosion resistance, and bake stability are critical.
High-performance can and closure coatings demanding sterilization resistance and substrate adhesion.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear, pale yellow liquid |
| Solvent System | Aromatic-free (proprietary aliphatic hydrocarbon blend) |
| Non-Volatile Content (wt%) | 60 ± 1 % |
| Hydroxyl Value (mg KOH/g) | 85–95 |
| Acid Value (mg KOH/g) | < 5 |
| Viscosity (25°C, mPa·s) | 1,800–2,400 |
Q1: What is the primary function of MACRYNAL SM 513 60LG in coating formulations?
A: MACRYNAL SM 513 60LG 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, hardness development, and chemical resistance while maintaining good gloss and clarity.
Q2: Is MACRYNAL SM 513 60LG suitable for high-solids or low-VOC applications?
A: Yes — this resin is formulated with a relatively low viscosity and moderate hydroxyl value, making it well-suited for high-solids coatings and VOC-compliant systems. It enables formulators to reduce solvent demand without compromising flow, leveling, or cure performance.
Q3: Which curing agents are commonly paired with MACRYNAL SM 513 60LG?
A: It is typically crosslinked with aliphatic isocyanate hardeners (e.g., HDI-based trimer or biuret types) in 2K PU systems. Compatibility with melamine-formaldehyde resins is limited due to its hydroxyl functionality profile and intended use in ambient- or forced-dry PU applications.
Q4: How should MACRYNAL SM 513 60LG be stored and handled?
A: Store in tightly sealed containers under cool, dry conditions away from direct sunlight and moisture. Avoid prolonged exposure to elevated temperatures or humidity, which may affect viscosity or hydroxyl functionality over time. Standard industrial handling precautions for organic solvents apply.
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