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Medium-oil-length alkyd resin offering balanced drying speed and film flexibility.
Excellent compatibility with nitrocellulose, vinyls, and other common coating resins.
Provides good gloss retention and weather resistance in air-drying systems.
Low viscosity enables high-solids formulation without sacrificing application performance.
Designed for consistent batch-to-batch reproducibility and reliable processing stability.
General-purpose industrial maintenance coatings for metal substrates.
Air-drying decorative enamels for furniture and cabinetry finishes.
Undercoats and primers requiring good sandability and intercoat adhesion.
Wood varnishes and clear topcoats where clarity and flow are critical.
| Chemical Type | Medium-oil-length modified alkyd resin |
| Product Form | Liquid (solution in aromatic hydrocarbons) |
| Appearance | Clear, pale yellow to amber liquid |
| Non-Volatile Content (wt%) | ~60–65% |
| Viscosity (25°C, Brookfield RV, spindle #4, 20 rpm) | 1,800–2,500 cP |
| Acid Value (mg KOH/g) | 6–10 |
| Solubility | Readily soluble in xylene, toluene, and high-flash naphthas |
| Primary Applications | Industrial maintenance coatings, decorative enamels, wood varnishes |
Q1: What is the primary application area for SETAL D645/63?
A: SETAL D645/63 is a medium-oil alkyd resin specifically designed for high-performance air-drying decorative and protective coatings, including industrial maintenance paints, wood finishes, and general-purpose enamels where good gloss retention, hardness development, and solvent release are required.
Q2: Is SETAL D645/63 compatible with common crosslinkers used in two-component systems?
A: SETAL D645/63 is formulated as a single-component, air-drying alkyd and is not intended for use with external crosslinkers such as melamines or isocyanates. It relies on autoxidative curing and is typically modified or blended with other resins when enhanced chemical resistance or faster through-dry is needed.
Q3: How does SETAL D645/63 perform in terms of yellowing resistance?
A: As a cobalt-free, semi-crystalline alkyd resin, SETAL D645/63 offers improved resistance to yellowing compared to traditional cobalt-catalyzed long-oil alkyds—particularly in interior applications and clear coats—though prolonged UV exposure may still lead to gradual discoloration over time.
Q4: Can SETAL D645/63 be thinned with standard organic solvents?
A: Yes, SETAL D645/63 is fully soluble in common aromatic and aliphatic hydrocarbon solvents (e.g., xylene, mineral spirits, high-flash naphtha) and ketones (e.g., MEK, MIBK), allowing flexible formulation into conventional solvent-borne coating systems without requiring specialty thinners.
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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
