High hydroxyl functionality for excellent crosslink density with melamine and polyisocyanate curing agents.
Optimized molecular weight distribution for superior flow, leveling, and film formation in high-gloss coatings.
Low VOC formulation compatibility — designed to support solvent-borne systems meeting stringent regulatory requirements.
Enhanced weathering resistance and UV stability for durable exterior performance.
Good compatibility with common acrylic, polyester, and cellulose ester resins in multi-resin binder systems.
Automotive OEM topcoats and clearcoats.
Industrial maintenance coatings for metal substrates.
General-purpose coil coatings requiring high durability and gloss retention.
Prefinished building products including aluminum composite panels (ACP) and architectural extrusions.
High-performance refinish coatings for automotive and heavy-duty equipment.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid solution |
| Appearance | Clear, pale yellow liquid |
| Solvent System | Butyl acetate / xylene blend |
| Hydroxyl Value (mg KOH/g) | 80–90 |
| Acid Value (mg KOH/g) | < 5 |
| Non-Volatile Content (% w/w) | 78–82 |
| Viscosity (mPa·s, 25°C, #4 spindle, 20 rpm) | 1,200–2,000 |
Q1: What is the primary function of MACRYNAL SM 2703 80BACX in coating formulations?
A: MACRYNAL SM 2703 80BACX serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane and melamine-cured systems, contributing to film formation, hardness development, and chemical resistance.
Q2: Is this resin suitable for high-solids or low-VOC coating applications?
A: Yes — its formulation supports reduced solvent demand and is commonly incorporated into high-solids and low-VOC industrial coatings, especially where balanced viscosity, pot life, and cure performance are required.
Q3: Which crosslinkers are typically compatible with MACRYNAL SM 2703 80BACX?
A: It is broadly compatible with aliphatic and aromatic isocyanate crosslinkers (e.g., HDI- and IPDI-based adducts or biuretes) as well as amino resins such as highly methylated melamines, depending on the desired cure schedule and end-use requirements.
Q4: How should this resin be stored to maintain stability and performance?
A: Store in tightly sealed original containers in a cool, dry, and well-ventilated area away from direct sunlight, heat sources, and strong oxidizing agents. Prolonged exposure to elevated temperatures or moisture may affect viscosity and reactivity.
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