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Water-reducible alkyd resin enabling low-VOC, high-performance coatings without co-solvents.
Excellent balance of drying speed, hardness development, and flexibility for demanding industrial applications.
Superior gloss retention and color stability upon UV exposure and weathering.
Good compatibility with acrylic emulsions, polyurethane dispersions, and other waterborne resins.
Optimized for ambient-cure systems with robust film formation and adhesion on metal and wood substrates.
Industrial maintenance coatings for steel structures and equipment.
Architectural metal coatings including façade panels and roofing systems.
High-end wood finishes for interior doors, furniture, and cabinetry.
General-purpose protective coatings requiring durability and aesthetic quality.
Hybrid waterborne topcoats combining alkyd performance with environmental compliance.
| Chemical Type | Water-reducible modified alkyd resin |
| Product Form | Liquid dispersion in water |
| Appearance | Opaque white to off-white liquid |
| pH (10% aqueous solution) | 7.5–8.5 |
| Solids Content (wt%) | 55 ± 1% |
| Viscosity (Brookfield, LVT, #3 spindle, 60 rpm, 25°C) | 1,200–1,800 mPa·s |
| Particle Size (D50) | 0.8–1.2 µm |
| Key Features | Low VOC (< 100 g/L), fast air-dry, excellent gloss & flow |
Q1: What is the primary application of RESYDROL VAF 5540w/70MP?
A: RESYDROL VAF 5540w/70MP is a water-reducible alkyd resin designed for high-performance industrial and protective coatings, particularly where low VOC content, good film formation, and balanced drying characteristics are required—commonly used in maintenance coatings, general metal finishes, and wood coatings.
Q2: How does this resin achieve water reducibility without compromising film integrity?
A: The resin incorporates carefully balanced hydrophilic functional groups and a tailored molecular architecture that enables stable dispersion in water-based systems. Its formulation allows for effective coalescence during film formation, delivering cohesive, durable films with good resistance to water spotting and early moisture exposure.
Q3: Can RESYDROL VAF 5540w/70MP be blended with acrylic emulsions or other waterborne resins?
A: Yes, it is compatible with many common acrylic emulsions and other waterborne binders, enabling hybrid systems that combine the hardness and gloss of alkyds with the fast dry-through and alkali resistance of acrylics. Compatibility testing under actual formulation conditions is recommended to optimize stability and performance.
Q4: What type of catalysts or additives are typically used to enhance its through-dry performance?
A: Metal-based driers (e.g., cobalt-, zirconium-, or calcium-containing catalysts) are commonly employed to accelerate oxidative crosslinking. Non-cobalt alternatives are also widely used to meet regulatory and sustainability goals. Dosage depends on formulation requirements and desired dry schedule, and should be optimized empirically.
Q5: Is RESYDROL VAF 5540w/70MP suitable for use in coatings intended for food-contact surfaces?
A: This resin is not pre-qualified for direct food-contact applications. Formulators intending such use must conduct full regulatory evaluation—including migration testing and compliance verification—based on the final cured coating composition and applicable regional regulations.
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E-mail: wangxingqiang@ericwchem.com
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