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Waterborne hydroxyl-functional acrylic resin designed for high-performance two-component polyurethane coatings.
Excellent compatibility with aliphatic isocyanates and standard waterborne crosslinkers.
Delivers outstanding film hardness, gloss retention, and chemical resistance after cure.
Low VOC formulation compliant with stringent environmental regulations including EU REACH and US EPA guidelines.
Good hydrolytic stability and storage stability in aqueous dispersions at ambient temperature.
Architectural and industrial maintenance coatings for metal substrates.
High-end automotive refinish clearcoats and basecoat/clearcoat systems.
Wood coatings requiring low-temperature cure and excellent clarity.
Plastic coatings for automotive interior trim and consumer electronics housings.
General-purpose protective coatings for machinery, agricultural equipment, and HVAC components.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Aqueous dispersion |
| Appearance | Clear to slightly hazy, colorless to pale yellow liquid |
| Solids Content | 42 ± 1 wt% |
| pH | 7.5 – 8.5 |
| Hydroxyl Value | 65 – 75 mg KOH/g |
| Viscosity (Brookfield, RVT, #2 spindle, 20 rpm, 25°C) | 100 – 300 mPa·s |
| Particle Size (D50) | 80 – 120 nm |
Q1: What is the primary function of MACRYNAL SM 6810w 42WA in coating formulations?
A: MACRYNAL SM 6810w 42WA is a waterborne hydroxyl-functional acrylic resin designed primarily as a reactive binder in two-component polyurethane and melamine-cured systems. It contributes to film formation, hardness development, chemical resistance, and gloss retention while enabling low-VOC and high-solids compliant formulations.
Q2: Is this resin compatible with common crosslinkers used in industrial coatings?
A: Yes — it is formulated for compatibility with aliphatic and aromatic isocyanate crosslinkers (e.g., HDI- and IPDI-based adducts or biurets) as well as amino resins such as melamine formaldehyde. Compatibility and cure performance should be verified under specific formulation conditions, including pH, solids content, and co-solvent selection.
Q3: How does the waterborne nature of SM 6810w 42WA affect application and drying behavior?
A: As a stable anionic waterborne dispersion, it enables good flow and leveling with reduced organic solvent demand. Drying involves initial water evaporation followed by coalescence and, upon addition of a crosslinker, thermal or ambient cure. Film formation may require controlled humidity and temperature conditions to avoid surface defects or incomplete fusion.
Q4: Can SM 6810w 42WA be used in exterior architectural coatings?
A: While its acrylic backbone provides inherent UV stability and weatherability, final performance in exterior applications depends on the full formulation—including crosslinker type, pigment volume concentration, UV absorbers, and stabilizers. It has been successfully applied in high-performance exterior wood and metal coatings where durability and gloss retention are critical.
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