Ionic Liquids as multifunctional additives for epoxy systems

At PPNT, we have developed an innovative technology for the modification and crosslinking of composite systems using tailored ionic liquids. Our solution is based on utilizing ionic liquids as latent hardeners. Unlike conventional amines, these compounds remain entirely chemically inert at room temperature, and the polymerization process initiates only upon applying a precisely defined thermal trigger. Importantly, the ionic liquids we design can act as multifunctional additives within the composite matrix, modifying functional properties such as thermal stability, flame retardancy, and/or mechanical strength.

Key technological aspects:

• High dosing efficiency and weight reduction: In optimized formulations, an initiator loading of 2–3 wt.% relative to 97–98 wt.% of the base resin is required.

• Wide processing window: Thanks to the chemical inertness of the hardener at room temperature, this technology significantly extends the pot life (working time) of the prepared resin system.

• Precise control over curing temperature: We offer systems capable of effectively curing commercial resins across a broad temperature range (from 50°C up to 250°C).

• Compatibility with commercial resins: Our curing systems have been validated and optimized using widely available commercial resin matrices.

• Multifunctional application profile: The ionic liquid molecular architecture can be tailored to serve not only as a crosslinking agent but also as a flame retardant or as an additive enhancing the mechanical and thermal performance of the resulting material.