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High-gloss, durable film formation with excellent leveling and flow characteristics.
Optimized fatty acid composition for balanced drying speed and long-term flexibility.
Good compatibility with common solvents, phthalic anhydride-modified resins, and metallic driers.
Low volatile organic compound (VOC) content suitable for environmentally compliant coating formulations.
Enhanced resistance to yellowing under UV exposure and thermal aging.
General-purpose air-drying decorative enamels for metal and wood substrates.
Industrial maintenance coatings for machinery, agricultural equipment, and structural steel.
Marine topcoats requiring weather resistance and gloss retention in moderate exposure conditions.
Automotive refinish primers and basecoats where flexibility and sandability are critical.
Can coatings for non-food-contact industrial containers and drums.
| Chemical Type | Phthalic anhydride-modified alkyd resin, medium-oil-length |
| Product Form | Liquid solution in aromatic hydrocarbon solvent (e.g., xylene) |
| Appearance | Clear, pale yellow to amber viscous liquid |
| Non-Volatile Content (wt%) | 55–60% |
| Viscosity (25°C, mPa·s) | 8,000–12,000 (Brookfield RV, spindle #4, 20 rpm) |
| Acid Value (mg KOH/g) | 6–9 |
| Density (25°C, g/cm³) | 1.04–1.08 |
| Solubility | Readily soluble in aromatic hydrocarbons, ketones, and ester solvents |
Q1: What is the primary application area for SM3104-X-70?
A: SM3104-X-70 is a medium-oil alkyd resin specifically engineered for high-performance decorative and protective coatings, including interior/exterior architectural paints, wood finishes, and metal primers where balanced drying speed, gloss retention, and film flexibility are required.
Q2: Is SM3104-X-70 compatible with common co-resins and additives?
A: Yes — it demonstrates good compatibility with melamine-formaldehyde resins, urea-formaldehyde crosslinkers, and conventional solvent-based additives such as rheology modifiers and defoamers. Compatibility testing under actual formulation conditions is recommended prior to full-scale production.
Q3: How does SM3104-X-70 perform in terms of drying and through-dry characteristics?
A: It offers a well-balanced air-drying profile with surface dry typically achieved within 2–4 hours and full through-dry within 24–48 hours under standard ambient conditions, depending on film thickness and ventilation. Its modified fatty acid composition supports consistent oxidative curing without excessive tackiness.
Q4: Can SM3104-X-70 be used in low-VOC formulations?
A: Yes — it can be formulated into solvent-borne systems with reduced aromatic content and is suitable for blends aimed at meeting regional VOC limits. Its solubility in common oxygenated solvents and esters facilitates VOC optimization without compromising film integrity.
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E-mail: wangxingqiang@ericwchem.com
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