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Water-reducible alkyd-modified polyester resin for low-VOC, high-performance coatings.
Excellent gloss retention and color stability under UV exposure.
Good compatibility with amino resins and common waterborne acrylic dispersions.
Enables fast ambient or forced-dry cure profiles without requiring strong acid catalysts.
Delivers balanced hardness, flexibility, and chemical resistance in final films.
Automotive refinish basecoats and clearcoats.
Industrial maintenance coatings for metal furniture and fixtures.
Coil coating primers and topcoats (pre-treatment compatible).
General-purpose waterborne industrial finishes for appliances and enclosures.
| Chemical Type | Alkyd-modified saturated polyester |
| Product Form | Waterborne dispersion |
| Appearance | Opaque white to off-white liquid |
| Non-Volatile Content (wt%) | 45–49% (at 110 °C, 15 min) |
| pH | 7.5–8.5 |
| Viscosity (mPa·s, Brookfield RVT, #3 spindle, 20 rpm) | 1,200–2,500 |
| Particle Size (D50, nm) | 120–180 |
| Primary Applications | Waterborne industrial and automotive refinish coatings |
Q1: What is the primary function of ROSKYDAL 850 W in polyester resin systems?
A: ROSKYDAL 850 W is a water-reducible, low-viscosity unsaturated polyester resin designed primarily as a reactive binder and film-forming component in high-solids or waterborne industrial coatings, including coil and can coatings. It contributes to crosslink density, hardness development, and chemical resistance upon curing.
Q2: Is ROSKYDAL 850 W compatible with common co-resins and crosslinkers used in industrial baking systems?
A: Yes — it is formulated to be compatible with standard amino resins (e.g., melamine-formaldehyde types) and other unsaturated polyesters or acrylics commonly employed in thermosetting industrial coating systems. Compatibility should always be verified experimentally within the final formulation due to sensitivity to pH, ionic strength, and solvent balance.
Q3: How should ROSKYDAL 850 W be stored and handled to maintain stability?
A: Store in tightly sealed containers at temperatures between 10 °C and 30 °C, away from direct sunlight and freezing conditions. Avoid prolonged exposure to high humidity or strong oxidizing agents. Prior to use, ensure thorough mixing if phase separation occurs during storage — gentle agitation is recommended.
Q4: Can ROSKYDAL 850 W be used in food-contact coating applications?
A: ROSKYDAL 850 W is not pre-approved for direct food-contact applications. Its suitability for such uses depends on full regulatory evaluation by the formulator, including compliance with applicable regional requirements (e.g., FDA, EFSA, or national food contact legislation) and successful migration testing of the final cured film.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
