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Water-reducible alkyd resin enabling low-VOC, high-performance coatings without co-solvents.
Excellent gloss retention and film clarity for premium decorative and protective finishes.
Good compatibility with acrylic dispersions and other waterborne resins for hybrid formulations.
Fast ambient cure with balanced drying profile—tack-free within 2–4 hours (23°C, 50% RH).
Enhanced hydrolytic stability for extended shelf life in aqueous systems.
Interior and exterior architectural wall paints requiring alkyd-like aesthetics and durability.
Waterborne wood stains and clear finishes for furniture and cabinetry.
Industrial maintenance coatings for metal substrates in mild-to-moderate exposure environments.
DIY and professional-grade decorative enamels where VOC compliance and ease of application are critical.
Hybrid waterborne topcoats for automotive refinish and specialty vehicle applications.
| Chemical Type | Water-reducible modified alkyd resin |
| Product Form | Aqueous dispersion (non-ionic) |
| Appearance | Opaque white to off-white liquid |
| pH (10% aqueous solution) | 7.5–8.5 |
| Solids Content (wt%) | 50 ± 1% |
| Viscosity (Brookfield RVT, spindle #3, 20 rpm, 25°C) | 500–1,200 mPa·s |
| Minimum Film Formation Temperature (MFFT) | ~15°C |
| Primary Applications | Decorative & protective waterborne coatings |
Q1: What is the primary application area for RESYDROL VAX 5538w/50WA?
A: RESYDROL VAX 5538w/50WA is a water-reducible alkyd resin specifically developed for high-performance industrial maintenance and protective coatings, including metal primers and mid-coats where low VOC content, good substrate wetting, and balanced drying performance are required.
Q2: Is this resin compatible with common co-binders and additives used in waterborne systems?
A: Yes, RESYDROL VAX 5538w/50WA is formulated to be compatible with typical waterborne acrylic dispersions, polyurethane dispersions, and standard surfactants, defoamers, and rheology modifiers—though compatibility testing under specific formulation conditions is always recommended prior to full-scale production.
Q3: How does the drying behavior of VAX 5538w/50WA compare to conventional solventborne alkyds?
A: It exhibits air-drying characteristics similar to medium-oil solventborne alkyds but with reduced reliance on active drying agents due to its optimized fatty acid composition and water-reducible architecture—resulting in improved through-dry and reduced surface tack in ambient-cure applications.
Q4: Can this resin be used in direct-to-metal (DTM) formulations?
A: Yes, RESYDROL VAX 5538w/50WA is suitable for DTM coatings when properly formulated with corrosion-inhibiting pigments and adhesion promoters; it delivers good early water resistance and substrate adhesion on ferrous and non-ferrous metals.
Q5: What viscosity adjustment or neutralization is required before incorporation into a coating formulation?
A: The resin is supplied pre-neutralized for aqueous dispersion and typically requires only moderate agitation and controlled pH adjustment (if needed) during let-down—no strong amine neutralization is necessary, supporting simplified manufacturing and lower amine emissions.
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E-mail: wangxingqiang@ericwchem.com
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