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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 ambient-cure applications.
Superior gloss retention and weather resistance in exterior architectural and industrial maintenance coatings.
Good compatibility with acrylic emulsions, urethane dispersions, and crosslinkers for hybrid systems.
Stable viscosity profile and broad formulation latitude across pH 7.5–9.0.
Waterborne industrial maintenance coatings for metal structures and equipment.
Exterior architectural coatings including masonry, stucco, and fiber-cement siding primers and topcoats.
Low-VOC wood coatings for interior trim, furniture, and cabinetry.
General-purpose protective coatings for agricultural and construction machinery.
Hybrid waterborne alkyd-acrylic topcoats requiring enhanced durability and recoatability.
| Chemical Type | Water-reducible alkyd resin (modified soybean oil-based) |
| Product Form | Aqueous dispersion |
| Appearance | Opaque white to off-white liquid |
| pH | 8.0 – 8.5 |
| Solids Content (wt%) | 55 ± 1% |
| Viscosity (Brookfield, RVT, #3, 20 rpm, 25°C) | 1,200 – 2,200 mPa·s |
| Density (20°C) | 1.02 – 1.05 g/cm³ |
| Minimum Film Formation Temperature (MFFT) | ≈ 15°C |
Q1: What is the primary function of RESYDROL EM 6642w/55BG in waterborne alkyd coatings?
A: RESYDROL EM 6642w/55BG serves as a reactive coalescing agent and film-forming aid, enhancing particle fusion, improving early water resistance, and supporting ambient-temperature film formation in low-VOC waterborne alkyd systems.
Q2: How does this resin contribute to gloss and surface appearance in finished coatings?
A: As a self-crosslinking, water-dispersible alkyd resin, it promotes uniform film formation and reduced surface tension, leading to improved leveling and higher gloss retention compared to conventional non-reactive coalescents—particularly in semi-gloss to high-gloss architectural and industrial maintenance formulations.
Q3: Is RESYDROL EM 6642w/55BG compatible with common waterborne acrylic or vinyl acetate dispersions?
A: Yes—it is formulated for broad compatibility with standard waterborne acrylic, styrene-acrylic, and vinyl acetate-based dispersions, enabling hybrid alkyd-acrylic systems without requiring extensive reformulation or additional stabilizers.
Q4: What storage conditions are recommended to maintain product stability?
A: Store in original sealed containers at temperatures between 5 °C and 30 °C, away from direct sunlight and freezing conditions. Prolonged exposure to temperatures below 5 °C may cause viscosity increase or phase separation, which is typically reversible upon gentle warming and mixing.
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