Exolit AP 462

Ammonium polyphosphate, microencapsulated with melamine resin

Clariant

×èÈ¼¼Á >> Á×ÐÍ Flame retardant / Fire retardant >> Phosphorus based »·ÑõÊ÷Ö¬ Epoxy Resins ¾Ûõ¥ Polyester Í¿²ã >> Ë®Éú Coatings >> Waterborne Ä¾Æ÷ &¼Ò¾ßÍ¿²ã Wood & Furniture Coatings Product description Exolit AP 462 is a product based on ammonium polyphosphate. It is manufactured from Exolit AP 422 by microencapsulation with melamine resin according to Clariant¡¯s own method. Exolit AP 462 is a fine-particle white powder with very low solubility in water, even at elevated temperatures. It is completely insoluble in organic solvents. The product is nonhygroscopic and non-flammable. Exolit AP 462 differs from Exolit AP 422 in the following properties: l marked reduction in water-soluble constituents l even lower viscosity in aqueous suspension l lower heat stability in the temperature range > 300 °C l improved powder flowability Applications Exolit AP 462 can be used for all applications ammonium polyphosphate is suitable for. In cases where a specific phosphorus content is required to obtain the desired effect, the lower phosphorus content of Exolit AP 462 should be compensated by increasing the amount of product added. Exolit AP 462 can be used advantageously in intumescent coatings for exterior applications where the ammonium polyphosphate is required to have extremely low water solubility and where lower heat stability at temperatures above 300 °C contributes to more rapid foaming of the coating. Intumescent coatings On account of its low water solubility, Exolit AP 462 is particularly suitable as an ¡±acid donor¡± for intumescent coatings. Other essential components of intumescent systems include a binder (in the case of emulsion paints, e.g. ÒMowilith grades from Clariant GmbH), a carbon donor (e.g. pentaerythritol) and a blowing agent (e.g. melamine). On exposure to flame, the intumescent coatings form a carbonaceous foam which effectively shields the underlying material from temperature increases. Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in DIN 4102. The application of Exolit AP 462-based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B1 (DIN 4102). Exolit AP 462 imparts a good flame-retardant effect to adhesives and sealants when it is incorporated into the base formulation at the rate of 10 - 20 %. Polyurethane foams Exolit AP 462 is a suitable non-halogenated flame retardant for polyurethane foams. If handling of Exolit AP 462 as a solid is not possible we recommend the dosage of the flame retardant by preparing a Exolit AP 462/polyol-suspension. Because of the low acid number of Exolit AP 462, it is also possible to incorporate this flame retardant in a Exolit AP 462/isocyanate suspension. To prevent the solid from settling, the Exolit AP 462 suspensions should be stirred or circulated by pump. Other applications Exolit AP 462 has an excellent flame-retardant effect in cellulose-containing materials such as paper and wood products. With chipboard products, the DIN 4102 B1 classification can be achieved by adding 15 - 20 % Exolit AP 462. Casting resins based on epoxy resins or unsaturated polyester resins achieve the classification UL94-V0 with Exolit AP 462. Used advantageously in intumescent coatings for exterior applications where the ammonium polyphosphate is required to have extremely low water solubility and where lower heat stability at temperatures above 300 °C contributes to more rapid foaming of the coating. Non-hydroscopic and non-flammable. Marked reduction in water-soluble constituents, even lower viscosity in aqueous suspension, lower heat stability in the temperature range > 300 °C, improved powder flowability. Particularly suitable as an ¡±acid donor¡±. Casting resins based on epoxy resins or unsaturated polyester resins achieve the classification UL94-V0.