A Novel Additive That Offers Fire Retardant Solution For Wood
Fire protection requirements are rising all over the globe, particularly in vehicle construction and public buildings. This development means that more and more appropriate materials, such as wood, can no longer be used in construction works of buildings or transportation equipment and should be swapped by other alternatives. The reason for the CTI-funded research development was consequently to construct flame retardant that would augment the fire resistance of such materials devoid of damaging the positive properties of the materials.
The new AFA flame retardant additive meets these necessities; it is colorless and can be mixed with waterborne paints or UV protective coatings. In addition, it is free of bromine and boron and contains no organic halogen compounds. It does not release toxic gases and develops its flame retardant consequence at concentrations as low as 10%.
AFA is based on the substance EDA-bis-TEPT created by Empa, an organophosphonate flame retardant. It unites nitrogen and phosphorus residues into a single molecule, which has fire retardant effects on cellulose. The new additive developed has been proved to be effective in internal testing and has been patently confined since 2018. Application testing is at present underway, for example, by adding AFA to a variety of commercially available building and paint systems.
The first tests with large panels of wood producers were very encouraging. The same holds true for the world’s third-largest producer of high-pressure (HPL) laminates. Once the AFA has been introduced into the cellulose during production, the flames of the material are securely avoided. In the next step, the AFA will pass the fire protection and approval tests mandatory for approval.
EDA-DOPO is another flame retardant developed at Empa and is one step closer to its commercial application. EDA-DOPO belongs to the class of phosphonamidates, does not enclose halogens that are unsafe to the environment and has been recorded in the REACH chemical database since last autumn.