Kukdo SM-020 is a premium solid bisphenol A epoxy resin in SM series, designed for high-performance coil coatings and general structural adhesives. It features excellent flexibility, adhesion and processability.
High flexibility - Excellent film flexibility after curing, suitable for coil bending and rolling processes
Strong substrate adhesion - Good wettability and firm bonding to various metal substrates
Stable weather resistance - Excellent water and salt spray resistance, providing long-term protection
Wide formula compatibility - Compatible with amino and phenolic curing agents, flexible formula adjustment
Easy processing - Solid form for easy storage and transportation, stable fluidity after melting
Coil Coatings - Primer and backcoat for metal coils, suitable for color-coated sheet manufacturing in construction and home appliances
Structural Adhesives - Structural bonding for metal components and automotive interior parts
Anti-Corrosion Coatings - Anti-corrosion and decorative coating for metal casings in light industry and home appliances
Composite Matrix - Manufacturing of glass fiber reinforced composites to improve flexibility
Printing Inks - Resin component for metal printing inks, enhancing adhesion and wear resistance
| Appearance | Light Yellow to Yellow Solid Granule/Flake |
| Type | Bisphenol A Epoxy Resin (Solid) |
| Epoxy Equivalent (g/eq) | 900-1100 |
| Epoxy Value (eq/kg) | 0.91-1.11 |
| Softening Point (℃) | 95-105 |
| Color (Gardner) | ≤3 |
| Density (20℃, g/cm³) | 1.17-1.21 |
| Volatile Content (%) | ≤1.0 |
| Hydrolyzable Chlorine (ppm) | ≤300 |
Q1: What is the primary functional role of SM-020 in epoxy formulations?
A: SM-020 is a reactive liquid epoxy resin modifier designed to enhance flexibility, impact resistance, and adhesion performance—particularly in rigid or brittle epoxy systems—without significantly compromising thermal stability or chemical resistance.
Q2: Is SM-020 compatible with standard amine-based hardeners?
A: Yes, SM-020 exhibits good reactivity with common aliphatic, cycloaliphatic, and aromatic amine hardeners, enabling its use in both ambient-cure and elevated-temperature cure systems. Compatibility should be verified experimentally for specific formulation targets.
Q3: How does SM-020 differ from conventional bisphenol-A epoxy resins like DGEBA?
A: Unlike high-molecular-weight solid resins, SM-020 is a low-viscosity liquid with lower epoxide equivalent weight (EEW), offering improved processability and higher crosslink density potential. Its molecular structure incorporates flexible segments, delivering enhanced toughness while retaining core epoxy functionality.
Q4: Can SM-020 be used in coatings requiring FDA compliance for indirect food contact?
A: SM-020 is not pre-certified for food-contact applications. Formulators must conduct full regulatory evaluation—including migration testing and toxicological review—based on final cured film composition and intended use conditions. Kukdo provides supporting technical documentation upon request to aid qualification efforts.
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