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Latent at room temperature — enables extended pot life and ambient storage stability.
Activates rapidly upon heating — delivers efficient epoxy resin curing above 120 °C.
Low volatility and low odor — supports safer handling and improved workplace air quality.
Excellent compatibility with standard diglycidyl ether of bisphenol-A (DGEBA) resins.
Yields high glass transition temperature (Tg) cured networks with superior thermal and mechanical performance.
Aerospace composite prepregs requiring precise cure scheduling and out-time control.
Electrical laminates for printed circuit boards (PCBs) demanding high Tg and dimensional stability.
Automotive under-hood components requiring resistance to sustained thermal cycling.
Wind turbine blade structural adhesives and matrix resins for elevated service temperatures.
High-performance tooling and casting compounds where low exotherm and controlled reactivity are critical.
| Chemical Type | Dicyandiamide-based latent curing agent |
| Product Form | White to off-white free-flowing crystalline powder |
| Appearance | Crystalline solid, non-hygroscopic |
| Primary Applications | Epoxy resin systems for composites, laminates, and structural adhesives |
| Key Features | Latency, thermal activation, low volatility, high Tg capability |
| Benefits | Extended shelf life, processing flexibility, consistent cure performance |
| Recommended Storage | Below 25 °C in sealed containers, protected from moisture |
| Cure Onset Temperature | Approx. 120 °C (as measured by DSC) |
Q1: What is the primary function of Aradur 2844 in epoxy systems?
A: Aradur 2844 is a latent curing agent designed to provide extended pot life at ambient temperatures while enabling rapid, efficient cure upon thermal activation—making it especially suitable for one-component (1K) epoxy formulations requiring storage stability and controlled processing.
Q2: At what temperature does Aradur 2844 typically initiate curing?
A: Cure initiation generally begins above 120 °C, with full crosslinking achieved within practical timeframes at temperatures between 140 °C and 180 °C—exact profile depends on formulation, part geometry, and heating rate.
Q3: Is Aradur 2844 compatible with standard DGEBA-type epoxy resins?
A: Yes, Aradur 2844 demonstrates broad compatibility with conventional diglycidyl ether of bisphenol-A (DGEBA) and related solid/liquid epoxy resins, as well as many modified epoxy systems—including those containing fillers, tougheners, or reactive diluents.
Q4: How should Aradur 2844 be incorporated into an epoxy formulation?
A: It is typically blended directly into the molten or heated epoxy resin under controlled conditions (e.g., 70–90 °C) with moderate agitation. Homogeneous dispersion is essential; pre-dilution in a small portion of resin may aid uniformity, particularly in high-viscosity or filled systems.
Q5: Does Aradur 2844 require post-cure treatment for optimal performance?
A: While many applications achieve satisfactory properties after the primary thermal cure cycle, a post-cure step (e.g., 1–2 hours at elevated temperature) can further enhance glass transition temperature (Tg), chemical resistance, and mechanical robustness—particularly in demanding structural or high-temperature service environments.
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