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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.
Outstanding gloss retention and UV resistance in exterior durable topcoats.
Good compatibility with common solvent-borne acrylics, alkyds, and polyester resins.
Optimized molecular weight distribution for balanced flow, leveling, and film hardness development.
Automotive OEM clearcoats and basecoats.
Industrial maintenance coatings for metal substrates.
General-purpose coil coatings requiring high durability and corrosion resistance.
Powder coating hybrid systems (liquid primers or flow-control modifiers).
High-performance wood finishes for furniture and architectural millwork.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin solution |
| Appearance | Clear to pale yellow, homogeneous liquid |
| Solvent System | Butyl acetate / xylene blend |
| Non-Volatile Content (wt%) | 70 ± 1% |
| Hydroxyl Value (mg KOH/g) | 95–105 |
| Acid Value (mg KOH/g) | < 5 |
| Viscosity (25°C, mPa·s) | 800–1,200 (DIN 4 mm cup) |
Q1: What is the primary function of MACRYNAL SM 2711 70BAC in coating formulations?
A: MACRYNAL SM 2711 70BAC serves as a hydroxyl-functional acrylic resin, primarily used as a co-resin in two-component polyurethane (2K PU) and melamine-cured systems to enhance hardness, gloss retention, chemical resistance, and weatherability.
Q2: Is this resin compatible with common crosslinkers used in industrial coatings?
A: Yes — it is specifically designed for compatibility with aliphatic isocyanates (e.g., HDI trimer and biuret types) and melamine formaldehyde resins. Compatibility should be verified experimentally in the final formulation due to sensitivity to catalysts, solvents, and additives.
Q3: How does the 70% solids content affect formulation handling and VOC considerations?
A: The 70% non-volatile content enables higher solids formulations with reduced solvent demand, supporting lower-VOC compliance strategies. Formulators typically adjust solvent blends to achieve target application viscosity while maintaining storage stability and pot life.
Q4: Can this resin be used in automotive refinish or OEM applications?
A: It is commonly employed in high-performance refinish topcoats and select OEM clearcoats where excellent clarity, UV stability, and mechanical durability are required. Final suitability depends on full system validation, including cure profile, adhesion, and regulatory compliance for the intended use.
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