Exolit® AP 422

Exolit® AP 422 by Clariant is a colorless, non-hygroscopic, non-flammable, fine particle ammonium polyphosphate (phase II). Acts as a flame retardant used as an acid donor due to its low water solubility. Exhibits very low acid number. Imparts lower viscosity in aqueous suspensions and in PU polyol suspension. Designed for intumescent coatings on wood or plastics. Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in EN, DIN, BS, ASTM and others. Their application on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1). Polyurethane foams with Exolit® AP 422 can be recycled. Recommended dosage level is 15-20% to achieve DIN EN 13501-1 classification with chipboard products.