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Medium-oil alkyd resin offering balanced drying speed and film flexibility.
Excellent compatibility with nitrocellulose, acrylics, and other common coating resins.
Provides good gloss retention and weather resistance in air-dried systems.
Low viscosity enables high-solids formulation without excessive solvent demand.
Consistent batch-to-batch performance supported by DSM’s stringent quality control.
General-purpose industrial maintenance coatings for metal substrates.
Air-dry primers and mid-coats in agricultural and construction equipment finishes.
Decorative wood varnishes requiring clarity, hardness, and sandability.
Undercoats and tie-coats in multi-layer OEM and aftermarket automotive refinishing systems.
Enamels for household appliances and metal furniture.
| Chemical Type | Medium-oil modified alkyd resin |
| Product Form | Liquid (solution in aromatic hydrocarbons) |
| Appearance | Clear to pale yellow viscous liquid |
| Non-Volatile Content (NV%) | ~75% (by weight, as supplied) |
| Viscosity (Ford Cup #4, 25°C) | 60–90 seconds |
| Acid Value | 8–12 mg KOH/g |
| Primary Applications | Industrial maintenance coatings, wood varnishes, metal enamels |
| Key Features | Good drying profile, film toughness, and solvent release |
Q1: What is the primary application of Uralac 252 X-75 in coating systems?
A: Uralac 252 X-75 is a solvent-based alkyd resin specifically designed as a reactive diluent and viscosity modifier in high-solids, low-VOC decorative and protective coatings—particularly where improved flow, leveling, and gloss retention are required without compromising film integrity.
Q2: How does Uralac 252 X-75 differ from conventional alkyd resins in terms of reactivity and cure behavior?
A: Unlike traditional drying alkyds, Uralac 252 X-75 features a modified fatty acid backbone and controlled molecular weight distribution, enabling faster oxidative crosslinking and enhanced compatibility with co-resins such as melamine-formaldehyde or polyisocyanates—resulting in shorter through-dry times and improved hardness development.
Q3: Is Uralac 252 X-75 suitable for use in water-reducible systems?
A: No—it is formulated for solvent-based systems and is not inherently water-dispersible. For water-reducible applications, DSM recommends evaluating alternative Uralac grades specifically engineered with emulsifiable functionality.
Q4: What solvents are typically recommended for optimal dilution and handling of this resin?
A: Uralac 252 X-75 demonstrates excellent solubility in common aromatic and aliphatic hydrocarbons (e.g., xylene, Solvesso™ 100, mineral spirits), as well as ketones like MEK and acetone—solvent selection should align with VOC regulations and desired evaporation rate in the final formulation.
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