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Allnex MACRYNAL VSM 6299w/42WA from Allnex's MACRYNAL series is a waterborne hydroxyl - functional acrylic resin in WB Acrylics group, designed for high - quality 2K topcoats in industrial metal, vehicle refinish and other fields. It combines with water - emulsifiable polyisocyanates, develops excellent hardness at room temperature
Waterborne & eco - friendly with low VOC - Water - based system and low/zero VOC characteristics meet environmental standards of many countries, reducing pollution to coating environment and atmosphere.
Fast hardness development at room temperature - Forms high - hardness coating quickly at room temperature without high - temperature baking, shortening construction cycle and reducing energy consumption.
High gloss and excellent appearance - Helps coatings achieve high gloss and flat appearance, reduces defects such as craters and orange peel, and improves paint finish texture.
Good compatibility with polyisocyanates - Excellent compatibility with water - emulsifiable polyisocyanates, ensuring sufficient curing reaction and stable coating performance.
Waterborne & eco - friendly with low VOC - Water - based system and low/zero VOC characteristics meet environmental standards of many countries, reducing pollution to coating environment and atmosphere.
Fast hardness development at room temperature - Forms high - hardness coating quickly at room temperature without high - temperature baking, shortening construction cycle and reducing energy consumption.
High gloss and excellent appearance - Helps coatings achieve high gloss and flat appearance, reduces defects such as craters and orange peel, and improves paint finish texture.
Good compatibility with polyisocyanates - Excellent compatibility with water - emulsifiable polyisocyanates, ensuring sufficient curing reaction and stable coating performance.
| Appearance | Milky white liquid |
| Solid Content | 42 ± 2 % (by weight) |
| Hydroxyl Content (on solids) | 3.5 ± 0.3 % |
| pH Value | 7.5 - 8.5 |
| Viscosity (23℃, Brookfield) | 50 - 200 mPa·s |
| Acid Value (on solids) | 10 - 15 mg KOH/g |
| Density (23℃) | 1.05 ± 0.02 g/cm³ |
Q1: What is the primary function of MACRYNAL VSM 6299w/42WA in waterborne coating systems?
A: It serves as a hydroxyl-functional acrylic resin designed to act as a reactive binder in two-component (2K) waterborne polyurethane and polyester systems, enabling crosslinking with isocyanate curing agents to deliver enhanced hardness, chemical resistance, and film integrity.
Q2: Is MACRYNAL VSM 6299w/42WA compatible with common waterborne polyisocyanate hardeners?
A: Yes — it is formulated for compatibility with standard aliphatic water-dispersible polyisocyanates, including HDI- and IPDI-based crosslinkers. Optimal performance is achieved when matched with hardeners offering balanced reactivity and hydrolytic stability in aqueous environments.
Q3: How does this resin contribute to film formation and appearance in low-VOC coatings?
A: Its carefully balanced molecular weight and hydrophilic/hydrophobic balance support good coalescence at ambient temperatures, yielding films with high gloss, excellent clarity, and minimal surfactant demand — supporting formulators’ goals for high-performance, low-VOC industrial and decorative finishes.
Q4: Can MACRYNAL VSM 6299w/42WA be used in direct-to-metal (DTM) applications?
A: Yes — it is suitable for DTM formulations where corrosion inhibition is provided by complementary additives or pigments. Its hydroxyl functionality and film-forming characteristics support adhesion and barrier properties on properly prepared steel and aluminum substrates.
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