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High purity bisphenol A-based epoxy resin with consistent epoxide equivalent weight (EEW) for reliable reactivity and cure performance.
Excellent adhesion to metals, composites, and concrete substrates across diverse environmental conditions.
Low viscosity enables easy handling, efficient mixing with hardeners, and superior wet-out of reinforcements in composite applications.
Outstanding mechanical strength and chemical resistance in cured form, including resistance to alkalis, solvents, and moisture.
Proven compatibility with a broad range of amine, anhydride, and phenolic curing agents for formulation flexibility.
Structural adhesives for aerospace, automotive, and rail transportation assemblies.
Matrix resin in fiber-reinforced polymer (FRP) composites for wind turbine blades and industrial tanks.
High-performance coatings for marine, offshore, and infrastructure protection (e.g., steel bridges, pipelines).
Electrical encapsulants and potting compounds for power electronics and transformers.
Repair mortars and grouts requiring rapid strength development and long-term durability.
| Chemical Type | Bisphenol A diglycidyl ether epoxy resin |
| Product Form | Clear to pale yellow liquid |
| Appearance | Transparent, low-viscosity liquid at 25°C |
| Epoxide Equivalent Weight (EEW) | 185–192 g/eq |
| Viscosity at 25°C | 12–14.5 Pa·s (12,000–14,500 cP) |
| Chloride Content | ≤ 1,000 ppm |
| Softening Point | 12–14°C |
| Primary Applications | Adhesives, composites, coatings, electrical encapsulation, civil engineering repair systems |
Q1: What is the typical molecular weight range and epoxy equivalent weight (EEW) of EPICOTE A Resin 828?
A: EPICOTE A Resin 828 is a standard liquid bisphenol A-based epoxy resin with an epoxy equivalent weight typically in the range of 185–192 g/eq and an average molecular weight of approximately 370–400 g/mol. These values reflect its classification as a low-molecular-weight, difunctional epoxy suitable for broad reactivity and formulation flexibility.
Q2: How should EPICOTE A Resin 828 be stored to maintain stability and performance?
A: Store in original unopened containers at temperatures between 15°C and 30°C, away from direct sunlight and sources of heat or moisture. Prolonged exposure to temperatures below 10°C may cause crystallization, which can be reversed by gentle warming to 40–50°C followed by thorough mixing. Avoid repeated freeze-thaw cycles.
Q3: Is EPICOTE A Resin 828 compatible with common amine and anhydride curing agents?
A: Yes — it exhibits excellent compatibility with a wide range of curing agents including aliphatic and cycloaliphatic amines, aromatic amines, and acid anhydrides. Its reactivity profile supports both ambient-cure and elevated-temperature cure systems, making it well-suited for coatings, adhesives, and composites applications.
Q4: Can EPICOTE A Resin 828 be used in food-contact or potable water applications?
A: EPICOTE A Resin 828 is not pre-approved for direct food-contact or potable water applications. Formulators must conduct full regulatory evaluation—including migration testing and compliance verification—based on final cured system composition, intended use conditions, and applicable regional regulations.
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E-mail: wangxingqiang@ericwchem.com
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