Water-reducible alkyd resin designed for low-VOC, high-solids industrial coatings.
Excellent storage stability in aqueous dispersions without added coalescents.
Fast ambient cure with good hardness development and early handling properties.
Superior compatibility with acrylic emulsions and crosslinkers for hybrid systems.
Good gloss retention and resistance to yellowing upon UV exposure.
Waterborne industrial maintenance coatings for metal structures.
Low-VOC OEM and refinish coatings for agricultural and construction equipment.
Interior and exterior architectural trim and wood finishes.
Coatings for metal furniture and office fixtures requiring fast throughput.
| Chemical Type | Modified water-reducible alkyd resin |
| Product Form | Aqueous dispersion (non-ionic stabilized) |
| Appearance | Opaque white to off-white liquid |
| pH (10% solution) | 7.5 – 8.5 |
| Solids Content (wt%) | 35 ± 1% |
| Viscosity (Brookfield RVT, #2 spindle, 20 rpm, 25°C) | 150 – 400 mPa·s |
| Minimum Film Formation Temperature (MFFT) | ≈ 15°C |
| Primary Applications | Waterborne industrial and architectural protective coatings |
Q1: What is the primary function of RESYDROL EZ 6645WCAT/35WA in waterborne alkyd systems?
A: RESYDROL EZ 6645WCAT/35WA is a catalyzed water-reducible alkyd resin designed to accelerate ambient-cure film formation in low-VOC, waterborne architectural and industrial maintenance coatings. It enables faster hardness development and improved early water resistance without requiring external catalysts or co-solvents.
Q2: Can this resin be used in direct-to-metal (DTM) applications?
A: Yes — RESYDROL EZ 6645WCAT/35WA is formulated for compatibility with common DTM pigment systems and corrosion-inhibiting additives. Its catalyzed nature supports robust adhesion and crosslink density on properly prepared steel and aluminum substrates, making it suitable for maintenance-grade protective coatings.
Q3: How does this product differ from conventional uncatalyzed waterborne alkyds?
A: Unlike standard water-reducible alkyds, RESYDROL EZ 6645WCAT/35WA incorporates an integrated, non-leaching catalyst system that promotes autoxidative crosslinking at ambient temperatures. This results in significantly reduced tack-free time, enhanced through-dry performance, and improved block resistance — especially under high-humidity conditions.
Q4: Is RESYDROL EZ 6645WCAT/35WA compatible with acrylic emulsions and other waterborne binders?
A: Yes — it demonstrates good physical and chemical compatibility with styrene-acrylic, vinyl acetate copolymer, and PUD-based emulsions. Blending ratios should be optimized during formulation development to ensure colloidal stability and balanced film properties, particularly when targeting hybrid binder systems.
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