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Highly versatile bisphenol-A based liquid epoxy resin with excellent compatibility with standard amine and anhydride curing agents.
Optimized molecular weight distribution for balanced reactivity, low viscosity, and superior wetting of fillers and reinforcements.
Consistent batch-to-batch quality meeting stringent ISO 9001 manufacturing controls and RoHS-compliant formulation.
Low volatile organic compound (VOC) content, supporting environmentally responsible processing in industrial coatings and composites.
Enhanced thermal stability and hydrolytic resistance compared to conventional DGEBA resins, improving long-term performance in demanding environments.
Electrical encapsulation and potting compounds for transformers, sensors, and power modules.
High-performance structural adhesives in automotive and aerospace assembly.
Matrix resin for fiber-reinforced polymer (FRP) composites used in wind turbine blades and marine laminates.
Protective coatings for concrete flooring, chemical storage tanks, and offshore infrastructure.
UV-curable hybrid systems when combined with cationic photoinitiators for specialty printing and electronics.
| Chemical Type | Bisphenol-A diglycidyl ether (DGEBA) epoxy resin |
| Product Form | Clear, low-viscosity liquid |
| Appearance | Pale yellow to water-white, transparent |
| Epoxy Equivalent Weight (EEW) | 185–192 g/eq |
| Viscosity at 25°C | 12,000–15,000 cP |
| Chloride Content | ≤ 500 ppm |
| Volatiles Content | ≤ 0.3 wt% |
| Storage Stability | ≥ 12 months at 20–25°C in sealed containers |
Q1: What is the primary functional role of KUKDO SM-688 in epoxy formulations?
A: KUKDO SM-688 is a reactive liquid epoxy resin modifier designed to enhance flexibility, impact resistance, and adhesion performance—particularly in structural adhesives, coating systems, and composite matrices—without significantly compromising thermal stability or chemical resistance.
Q2: Is SM-688 compatible with standard amine-based hardeners?
A: Yes, SM-688 demonstrates good reactivity and miscibility with common aliphatic, cycloaliphatic, and aromatic amine hardeners. It participates fully in the crosslinking reaction and does not require special catalysts or extended induction periods under typical processing conditions.
Q3: How does SM-688 affect pot life and cure kinetics compared to conventional DGEBA resins?
A: Due to its lower viscosity and modified molecular architecture, SM-688 typically extends working time slightly when blended with standard epoxy systems, while maintaining acceptable gel times and full cure development at elevated temperatures. Exact behavior depends on hardener selection and formulation balance.
Q4: Can SM-688 be used in solvent-free or low-VOC applications?
A: Yes, SM-688 is a 100% reactive liquid with negligible volatility and no added solvents, making it well-suited for high-solids, solvent-free, and low-VOC epoxy formulations—including industrial coatings, electrical encapsulants, and construction adhesives.
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