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Medium-oil-length alkyd resin offering balanced drying speed and film flexibility.
Excellent compatibility with common solvents, phthalic anhydride-modified polyester resins, and amino crosslinkers.
Delivers superior gloss retention and color stability under indoor and moderate outdoor exposure.
Low viscosity grade facilitates easy formulation into solvent-based decorative and protective coatings.
Consistent batch-to-batch performance ensured through strict raw material control and in-process QC.
General-purpose solvent-based architectural paints for interior walls and ceilings.
Industrial maintenance coatings for metal substrates in mild environmental conditions.
Wood finishing systems including varnishes, stains, and clear topcoats for furniture and cabinetry.
Undercoat and primer formulations requiring good sandability and intercoat adhesion.
| Chemical Type | Phthalic Anhydride-Based Medium-Oil Alkyd |
| Product Form | Liquid Resin (Solvent-Borne) |
| Appearance | Clear to pale yellow viscous liquid |
| Non-Volatile Content (wt%) | 50–52% (at 105°C, 1 hr) |
| Viscosity (mPa·s, 25°C) | 8,000–12,000 (measured in xylene) |
| Acid Value (mg KOH/g) | 6–9 |
| Oil Length | 48–52% (by weight) |
| Solubility | Compatible with aromatic hydrocarbons, esters, and ketones |
Q1: What is the primary application field for Sam Chung 3676 Alkyd Resin?
A: Sam Chung 3676 is formulated for use in decorative and protective solvent-borne coatings, particularly where balanced drying performance, gloss retention, and substrate adhesion are required—commonly in industrial maintenance paints, metal primers, and general-purpose enamels.
Q2: Is Sam Chung 3676 compatible with common crosslinkers such as melamine-formaldehyde or polyisocyanates?
A: Yes, it exhibits good compatibility with amino resins (e.g., melamine-formaldehyde) for baking systems, and can also be modified or blended for use in ambient-cure two-component polyurethane systems—subject to proper formulation testing and catalyst selection.
Q3: How does Sam Chung 3676 perform in terms of yellowing resistance under UV exposure?
A: As a conventional alkyd resin based on phthalic anhydride and fatty acid derivatives, it offers moderate outdoor durability but is not classified as non-yellowing; prolonged UV exposure may lead to gradual discoloration—formulators often add UV absorbers or combine with acrylic modifiers to enhance light stability.
Q4: What solvents are recommended for diluting Sam Chung 3676 during paint manufacturing?
A: It dissolves readily in standard aromatic and aliphatic hydrocarbon solvents—including xylene, Solvent Naphtha Type II, and high-flash white spirit—and is generally stable in blends containing ketones or esters when used within typical coating solvent systems.
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E-mail: wangxingqiang@ericwchem.com
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