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High reactivity with standard bisphenol-A and bisphenol-F epoxy resins.
Enables fast ambient-cure formulations without external heat input.
Delivers excellent chemical resistance, particularly to alkalis and solvents.
Low viscosity ensures easy handling, metering, and homogeneous mixing.
Provides outstanding adhesion to metals, concrete, and composite substrates.
Industrial flooring systems requiring rapid return-to-service.
Protective coatings for steel structures in marine and offshore environments.
Adhesives and structural bonding in automotive and rail manufacturing.
Electrical encapsulation and potting compounds for power electronics.
Repair mortars and grouts for concrete infrastructure rehabilitation.
| Chemical Type | Aliphatic amine adduct |
| Product Form | Liquid |
| Appearance | Clear to pale yellow liquid |
| Primary Applications | Structural adhesives, protective coatings, flooring, encapsulation |
| Key Features | Ambient-curing, low exotherm, good flexibility |
| Benefits | Reduced processing time, improved worker safety, enhanced durability |
| Storage Stability | ≥12 months at 20–25 °C in sealed original container |
| Compatibility | Compatible with standard DGEBA and DGEBF epoxy resins |
Q1: What is the primary chemical nature of Epoxy Curing Agent 2678?
A: Evonik Epoxy Curing Agent 2678 is a low-viscosity, aliphatic amine-based curing agent designed for ambient- or elevated-temperature cure of epoxy resins. It offers good reactivity, flexibility in formulation, and favorable handling characteristics.
Q2: Is this curing agent suitable for coatings requiring high chemical resistance and low surface tack?
A: Yes — when properly formulated and cured, systems based on Epoxy Curing Agent 2678 typically deliver excellent chemical resistance, low surface tack, and good hardness development, making them well-suited for industrial maintenance coatings and protective linings.
Q3: How does humidity affect the curing performance of this agent?
A: As an amine-based system, Epoxy Curing Agent 2678 may be sensitive to high ambient humidity, which can lead to surface blushing or reduced pot life. Optimal performance is achieved under controlled conditions with moderate relative humidity and adequate ventilation.
Q4: Can it be used in combination with other curing agents or accelerators?
A: Yes — Epoxy Curing Agent 2678 is compatible with certain co-curing agents and accelerators to tailor cure speed, flexibility, or thermal performance. However, compatibility and stoichiometric balance must be verified experimentally for each specific formulation.
Q5: What are typical storage and handling recommendations?
A: Store in original sealed containers at temperatures between 10–30 °C, protected from moisture and direct sunlight. Handle using appropriate personal protective equipment (PPE), including gloves and eye protection, due to its amine functionality and potential skin sensitization risk.
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