A novel, sustainable solution to achieving high fire safety levels for transport and construction applications, has been launched by Clariant, with its pioneering new Exolit® EP non-halogenated flame retardants for epoxy resins. Exolit EP 150 and EP 200 are reactive phosphorus-based flame retardants that provide highly-effective fire protection at low dosage levels for epoxy thermosets and laminates. Currently available as laboratory product samples, they create exciting potential for parts manufacturers in these sectors to improve their efficiency and transition towards non-halogenated flame retardants. The ground-breaking Exolit EP grades have unmatched high phosphorus contents of 25% and 29% respectively, which enables only a low dosage of flame retardant to be used to reach the desired protection effect. Their performance is proven in electrical and electronics (E&E) applications, where UL 94 V0 fire ratings can be achieved at a loading of only 50% of conventional flame retardants.
Exolit EP 150 and EP 200 do not migrate out of the resin material. They bind with the polymer and ensure minimal impact on material properties. Processing and handling are also made easier because the flame retardant becomes part of the resin.
Exolit EP 150 is a low viscosity liquid, which makes it suitable as a flame retardant for infiltration processes. The liquid format is of particular significance for large-size applications, such as structural parts for airplanes or ships, where the ability to flow evenly across a large distance without separating or filtering from the glass fiber or carbon fiber, is critical for effective, long-term performance. While Exolit EP 200 is available in solid form, it will melt at higher processing temperatures to provide the same user benefit.