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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
Low VOC formulation compliant with stringent environmental regulations
Superior weather resistance and UV stability for long-term outdoor performance
Good compatibility with common solvent-based acrylic and polyester resins
Automotive OEM topcoats and clearcoats
Industrial maintenance coatings for metal substrates
General-purpose coil coatings
High-performance appliance finishes
Refinish coatings requiring rapid cure and gloss retention
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Liquid resin in organic solvent |
| Appearance | Clear, pale yellow to amber liquid |
| Hydroxyl Value (mg KOH/g) | 65 ± 5 |
| Non-Volatile Content (% w/w) | 60 ± 2 |
| Viscosity (mPa·s, 25°C, DIN 4) | 1,200 – 1,800 |
| Solvent System | Xylene / butyl acetate blend |
| Primary Applications | OEM automotive, industrial, and coil coatings |
Q1: What is the primary function of MACRYNAL SM 2892 65XBAC in coating formulations?
A: MACRYNAL SM 2892 65XBAC serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component polyurethane and polyester-based coating systems. It contributes to film formation, crosslink density, hardness development, and chemical resistance upon curing with suitable isocyanate hardeners.
Q2: Is this resin compatible with common aliphatic isocyanate crosslinkers?
A: Yes, MACRYNAL SM 2892 65XBAC is formulated for compatibility with standard aliphatic polyisocyanates, including HDI-based trimer and biuret types. Its hydroxyl functionality and molecular weight profile support good mixing stability and efficient crosslinking under typical ambient or forced-dry conditions.
Q3: How does this resin perform in high-gloss, weather-resistant topcoats?
A: As a low-viscosity, high-hydroxyl acrylic resin, it enables excellent flow and leveling, supporting superior gloss retention and long-term UV stability in exterior topcoats. Its acrylic backbone provides inherent resistance to chalking, fading, and gloss loss when properly formulated and cured.
Q4: Can MACRYNAL SM 2892 65XBAC be used in low-VOC or solvent-reduced systems?
A: Yes — its relatively low solution viscosity and high solids content allow formulators to reduce solvent demand while maintaining application performance. It is commonly employed in medium- to high-solids 2K PU systems targeting VOC compliance without sacrificing film integrity or cure response.
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