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Medium-oil-length alkyd resin offering balanced drying speed and film flexibility.
Excellent compatibility with common solvents, nitrocellulose, and thermoplastic acrylics.
Provides superior gloss retention and long-term color stability in exterior coatings.
Low viscosity for easy formulation and improved pigment wetting in solventborne systems.
Complies with major global VOC regulations for architectural and industrial maintenance coatings.
General-purpose air-drying enamel coatings for metal substrates.
Industrial maintenance paints for structural steel and machinery.
Wood finishing varnishes requiring good flow, leveling, and hardness development.
Undercoats and primers where adhesion and sandability are critical.
| Chemical Type | Medium-oil modified alkyd resin |
| Product Form | Liquid solution in aromatic hydrocarbons (e.g., xylene) |
| Appearance | Clear, pale yellow to amber viscous liquid |
| Non-Volatile Content (wt%) | 50 ± 2% |
| Viscosity (25°C, mPa·s) | 800–1,200 (Brookfield RVT, spindle #3, 20 rpm) |
| Acid Value (mg KOH/g) | 6–10 |
| Density (25°C, g/cm³) | 0.92–0.95 |
| Primary Applications | Air-drying industrial enamels, maintenance coatings, wood finishes |
Q1: What is the primary application of Sam Chung 3370D-1 Alkyd Resin?
A: Sam Chung 3370D-1 is a medium-oil-length alkyd resin designed primarily for solvent-based industrial maintenance coatings, general-purpose enamels, and protective topcoats where good gloss retention, flexibility, and moderate chemical resistance are required.
Q2: Is this resin compatible with common crosslinkers used in baked or ambient-cure systems?
A: Yes — 3370D-1 is formulated to be compatible with melamine-formaldehyde resins for thermosetting oven-cured systems, and it also performs well in ambient-cure formulations with isocyanate-based hardeners or metal driers, depending on the end-use requirements.
Q3: How does Sam Chung 3370D-1 compare to high-solids alkyd alternatives in terms of VOC content and application viscosity?
A: This grade offers a balanced profile: it delivers good film formation and flow at lower solvent demand than traditional long-oil alkyds, supporting moderate VOC reduction strategies without requiring major reformulation. Viscosity and solids content are optimized for conventional airless or spray application methods in industrial settings.
Q4: Can Sam Chung 3370D-1 be blended with other resin types such as acrylics or polyurethanes?
A: Yes — it demonstrates good compatibility with many acrylic copolymers and hydroxyl-functional polyurethane resins, enabling hybrid systems that combine alkyd weatherability and cost-efficiency with enhanced hardness or faster dry times from the co-resin.
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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
