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Waterborne hydroxyl-functional acrylic resin designed for high-performance two-component polyurethane coatings.
Offers excellent compatibility with aliphatic isocyanates and good film formation without co-solvents.
Delivers outstanding gloss retention, hardness development, and chemical resistance in cured films.
Low VOC formulation compliant with stringent environmental regulations for industrial and automotive refinish applications.
Stable in neutral to slightly alkaline pH range, supporting robust storage and formulation flexibility.
Automotive refinish topcoats and clearcoats.
Industrial maintenance coatings for metal substrates.
High-end architectural façade and cladding coatings.
Plastic coatings requiring adhesion and flexibility balance.
General-purpose waterborne polyurethane protective coatings.
| Chemical Type | Hydroxyl-functional acrylic copolymer |
| Product Form | Waterborne dispersion |
| Appearance | Clear to slightly hazy liquid |
| Solids Content (wt%) | 37 ± 1% |
| pH | 7.5 – 8.5 |
| Hydroxyl Value (mg KOH/g) | 85 – 95 |
| Viscosity (mPa·s, 25°C, Brookfield LVT, Spindle 3, 12 rpm) | 100 – 400 |
| Primary Applications | 2K PU coatings for automotive refinish, industrial maintenance, and architectural use |
Q1: What is the primary function of MACRYNAL SM 6825w 37WA in coating formulations?
A: It serves as a hydroxyl-functional acrylic resin that acts as a reactive binder in two-component polyurethane and polyester-based systems, contributing to film formation, hardness development, chemical resistance, and gloss retention.
Q2: Is MACRYNAL SM 6825w 37WA compatible with common crosslinkers used in industrial coatings?
A: Yes — it is specifically designed for compatibility with aliphatic isocyanate crosslinkers (e.g., HDI trimer and biuret types) and shows good reactivity and pot life stability in solventborne and high-solids 2K PU systems.
Q3: How does the waterborne nature of this resin affect its handling and formulation?
A: As a waterborne dispersion, it enables reduced VOC content and improved workplace safety, but requires careful pH control and compatibility assessment with other water-based components; it is not intended for direct dilution with tap water without technical evaluation.
Q4: Can this resin be used in automotive refinish or OEM applications?
A: It is formulated for high-performance industrial and automotive topcoat applications, including refinish systems where excellent clarity, UV stability, and substrate adhesion are required — however, final suitability depends on full system validation under end-use conditions.
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