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High hydroxyl functionality for excellent crosslinking density with melamine and polyisocyanate curing agents.
Optimized molecular weight distribution for superior flow, leveling, and film formation in high-solids coatings.
Low viscosity enables formulation flexibility and reduced solvent demand in environmentally compliant systems.
Excellent compatibility with common acrylics, alkyds, and polyester resins for hybrid coating formulations.
Consistent batch-to-batch reproducibility supported by Allnex’s stringent quality control protocols.
Automotive OEM topcoats and clearcoats requiring high gloss and durability.
Industrial maintenance coatings for metal substrates including machinery and agricultural equipment.
General-purpose coil coatings for pre-painted steel and aluminum applications.
Refinish coatings used in automotive body shop and commercial vehicle repair systems.
High-performance plastic coatings for automotive interior and exterior trim components.
| Chemical Type | Hydroxyl-functional acrylic resin |
| Product Form | Liquid solution in aromatic hydrocarbons and ester solvents |
| Appearance | Clear, pale yellow liquid |
| Hydroxyl Value (mg KOH/g) | 70–76 |
| Acid Value (mg KOH/g) | ≤ 5 |
| Non-Volatile Content (% w/w) | 70 ± 1 |
| Viscosity (mPa·s at 25°C, Brookfield LV, Spindle #3, 6 rpm) | 1,800–2,400 |
| Density (g/cm³ at 25°C) | 0.92–0.95 |
Q1: What is the primary function of MACRYNAL SM 565 70BAC in coating formulations?
A: MACRYNAL SM 565 70BAC serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane and polyester systems. It contributes to film formation, crosslink density, and overall durability while supporting good gloss, hardness development, and chemical resistance.
Q2: Is this resin compatible with common isocyanate crosslinkers used in industrial coatings?
A: Yes — MACRYNAL SM 565 70BAC is formulated for compatibility with standard aliphatic isocyanate crosslinkers, including HDI-based trimers and biuretes. Its hydroxyl functionality enables efficient urethane bond formation under typical ambient or forced-dry conditions.
Q3: How does the 70% solids content influence formulation handling and VOC considerations?
A: With approximately 70% non-volatile content, MACRYNAL SM 565 70BAC supports lower-solvent formulations compared to lower-solids alternatives, helping formulators meet evolving VOC reduction targets without compromising viscosity control or application performance.
Q4: Can this resin be used in high-gloss automotive refinish or OEM clearcoats?
A: Yes — its molecular design delivers excellent clarity, flow, and leveling characteristics, making it suitable for demanding high-gloss topcoat applications such as automotive refinish and select OEM clearcoat systems where appearance and long-term weatherability are critical.
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