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High purity bisphenol A-based epoxy resin with consistent epoxide equivalent weight (EEW) for reliable reactivity.
Excellent thermal stability and glass transition temperature (Tg) after curing, supporting demanding service environments.
Low viscosity at elevated temperatures, enabling efficient processing in casting, impregnation, and coating applications.
Superior adhesion to metals, composites, and cured polymer substrates without requiring specialized primers.
Compatible with a broad range of amine, anhydride, and phenolic hardeners for formulation flexibility.
Electrical insulation systems for medium- and high-voltage transformers and reactors.
Structural adhesives in aerospace and automotive composite bonding.
Protective coatings for offshore oil & gas infrastructure and chemical processing equipment.
Encapsulants and potting compounds for power electronics and LED modules.
Matrix resin in fiber-reinforced laminates for wind turbine blades and industrial tooling.
| Chemical Type | Bisphenol A diglycidyl ether (DGEBA) |
| Product Form | Clear to pale yellow viscous liquid |
| Appearance | Homogeneous, transparent, free from gel particles or sediment |
| Epoxide Equivalent Weight (EEW) | 185–192 g/eq |
| Viscosity (25°C) | 12,000–16,000 mPa·s |
| Chlorine Content (Total) | ≤ 1,200 ppm |
| Softening Point | 12–16°C |
| Color (Gardner) | ≤ 3 |
Q1: What are the primary application areas for Sanmu E-31?
A: Sanmu E-31 is widely used in high-performance protective coatings, electrical encapsulation compounds, and structural adhesives where excellent chemical resistance, thermal stability, and strong adhesion to metals and composites are required.
Q2: How does Sanmu E-31 differ from standard liquid bisphenol A epoxy resins?
A: Sanmu E-31 is formulated to offer a balanced combination of low viscosity, controlled reactivity, and enhanced compatibility with common amine and anhydride hardeners—making it particularly suitable for processing methods such as filament winding, vacuum infusion, and precision casting.
Q3: Is Sanmu E-31 compatible with common epoxy curing agents?
A: Yes—Sanmu E-31 demonstrates broad compatibility with aliphatic and cycloaliphatic amines, aromatic amines, and anhydride-type hardeners. Optimal cure schedules and stoichiometric ratios should be determined experimentally based on the specific formulation and end-use requirements.
Q4: What storage conditions are recommended to maintain product stability?
A: Store Sanmu E-31 in tightly sealed containers at temperatures between 15°C and 25°C, away from direct sunlight and moisture. Prolonged exposure to elevated temperatures or humidity may lead to increased viscosity or premature gelation.
Q5: Can Sanmu E-31 be modified with reactive diluents or fillers?
A: Yes—Sanmu E-31 is readily modifiable with standard mono- or difunctional reactive diluents to adjust viscosity, and it accepts common mineral fillers, silica, or glass microspheres to tailor mechanical performance and thermal expansion behavior.
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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
