CAS Number: 68333-79-9
Micro encapsulated APP (phase II) with extremely low water solubility.
Exolit AP 462 is a product based on ammonium polyphosphate.
Exolit AP 462 is a crystal modification is phase II.
Exolit AP 462 is manufactured from ammonium polyphosphate by micro-encapsulation with melamine resin.d.
Therefore the fine white powder of Exolit AP 462 shows a very low solubility in water, even at elevated temperatures, compared to Exolit AP 422.
Exolit AP 462 is completely insoluble in organic solvents.
Exolit AP 462 is non-hygroscopic and non-flammable.
Exolit AP 462 is a non-hygroscopic, non-flammable, ammonium polyphosphate-based flame retardant.
Exolit AP 462 exhibits lower viscosity in aqueous suspension, lower heat stability and improved powder flowability in comparison to Exolit AP 422.
Exolit AP 462 shows a very low solubility in water, even at elevated temperatures.
Exolit AP 462 is suitable for polyurethane foams application.
Exolit AP 462 has a shelf life of 12 months.
Benefits of Exolit AP 462:
-Exolit AP 462 is extremely low water solubility
-Exolit AP 462 is completely insoluble in organic solvents, non-hygroscopic and non-flammable
-Even lower viscosity in aqueous suspension, lower heat stability in the temperature range > 300 °C and improved powder flowability in comparison to Exolit® AP 422
-Exolit AP 462 can be used for all applications where ammonium polyphosphate is suitable
-Exolit AP 462 can be used advantageously in intumescent coatings 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
-Exolit AP 462 is particularly suitable as an ”acid donor” for intumescent coatings thanks to its low water solubility. Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in EN, DIN, BS, ASTM and others. The application of Exolit® AP 462 based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1)
-With chipboard products, the B classification according to DIN EN 13501-1 can be achieved by adding 15 - 20%
-Imparts a good flame-retardant effect to adhesives and sealants when it is incorporated into the base formulation at the rate of 10 - 20%
-Exolit AP 462 is suitable non-halogenated flame retardant for polyurethane foams and polyol dispersions are showing reduced viscosity behavior
-Exolit AP 462 has an excellent flame-retardant effect in cellulose-containing materials such as paper and wood products
-Casting resins based on epoxy resins or unsaturated polyester resins achieve the classification UL94-V0
-Exolit AP 462 can be used in transport applications to obtain good fire, smoke and toxicity results (EN 45545)
-Exolit AP 462 is non-halogenated flame retardant with favorable environmental and health profile
Function: Flame Retardant
Chemical Family of Exolit AP 462: Phosphorous-based Compounds
End Uses of Exolit AP 462: Waterborne Coating
Exolit AP 422 and Exolit AP 462 are high-quality additives for intumescent coatings.
Even at layer thicknesses of less than 1 mm they achieve fire resistance times of over 30 minutes.
Apart from the protection of steel structures in buildings, application areas include cable and wood.
In addition, the fire properties of textiles and papers can be improved with intumescent coatings based on Exolit AP.
In the case of thermosets like epoxy resins and unsaturated polyester resins, Exolit AP 422 paves the way for the production of lightweight components with low solids content.
In polyurethane rigid foams that are used e.g. for insulation purposes by the building industry, low smoke density in a fire and avoiding flame retardant migration are important criteria.
PUR Foams with Exolit AP 422 can also be recycled.
Applications of Exolit AP 462:
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 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, 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 EN, DIN, BS, ASTM and others.
The application of Exolit AP 462 based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1).
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 an 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 an 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 of Exolit AP 462:
Exolit AP 462 has an excellent flame-retardant effect in cellulose-containing materials such as paper and wood products.
With chipboard products the B classification according to DIN EN 13501-1 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.
In composites for transport applications it can be used to control fire, smoke and toxicity.
Especially in railway (EN 45545-2) and aviation (FAR 25.853) applications low smoke density and toxicity is a key requirement.
Product Type:
Additive > Flame retardants / Fire retardants > Phosphorus based
Recommended for:
Resin > Polyurethanes
Applications:
Coatings > Waterbase
Coatings
Industry:
Architectural
Chemical Composition:
Ammonium polyphosphate, microencapsulated with melamine resin
Advantages of Exolit AP 462:
-non-hydroscopic and non-flammable characteristics
-marked reduction in water-soluble constituents
Other Applications of Exolit AP 462:
-Plastic coating
-Wood & Furniture Coatings
Packaging and Handling of Exolit AP 462:
Delivery form:
White powder
Packaging of Exolit AP 462:
Exolit AP 462 is packed in 40 x 25 kg-paper bags (polyethylene inliner) net per 1.000 kg-pallet, shrink-wrapped.
Exolit AP 462 can also be supplied in a variety of big bags, shrink-wrapped.
Storage of Exolit AP 462:
Minimum shelf life of Exolit AP 462 is 12 months from the date of shipping when stored according to the recommended conditions.
Other products:
Exolit AP 420 Aqueous solution of ammonium polyphosphate (APP)
Exolit AP 422 Fine-grained white APP powder with low water solubility
Exolit AP 423 Micronized AP 422, especially fine powder
Exolit AP 431 (LP) Fine-grained white APP powder with low water solubility
Exolit AP 435 (TP) Fine-grained white APP powder with low water solubility, ensuring low viscosity of IC formulations
Exolit AP 462 Microencapsulated AP 422 with extremely low water solubility
Exolit AP 740 APP blend with synergists for light weight UP resins and gel coats
Exolit AP 740 F APP blend with synergists for light weight UP resins and gel coats, smaller particle size
Exolit AP 740 S APP blend with synergists for light weight UP resins and gel coats, less water soluble
Exolit AP 750 Intumescent system based on APP, especially for thermoset polymers
Exolit IFR 36 Synergist APP blend for 2-component epoxy based hydro carbon IC applications
Exolit AP 761 (LP) Intumescent system based on APP, especially for reinforced and extrusion applications
Exolit AP 765 Intumescent system based on APP, especially for reinforced and extrusion applications
Exolit AP 766 Intumescent system based on APP, especially for reinforced and extrusion applications
Exolit OP 550 Highly effective reactive, non-halogenated phosphorus polyol, functionality approx. 2
Exolit OP 560 Highly effective reactive, non-halogenated phosphorus polyol, functionality approx. 2
Exolit OP 930 Phosphinate, fine grained white powder especially developed for epoxy laminate systems
Exolit OP 935 Finer grained version of OP 930, especially developed for epoxy laminate systems
Exolit OP 945 (TP) Finest grained version of OP 930, especially developed for adhesives, fibres and films
Exolit OP 950 Phosphinate, white powder which melts at around 200 °C
Exolit OP 1230 Highly stable phosphinate flame retardant for high temperature nylons
Exolit OP 1240 Phosphinate flame retardant for polyester injection moulding applications
Exolit OP 1248 (TP) Phosphinate flame retardant system for polyester injection moulding applications
Exolit OP 1260 (TP) Phosphinate flame retardant system for polyester injection moulding applications
Exolit OP 1311 Phosphinate flame retardant system for Thermoplastic Elastomers
Exolit OP 1312 Standard Phosphinate flame retardant system for reinforced polyamide 6 and polyamide 66
Exolit OP 1314 Phosphinate flame retardant system for reinforced polyamide 6 and polyamide 66 for demanding conditions
Exolit OP 1400 Phosphinate flame retardant system for all polyamides; Highest stability
Exolit EP 150 (LP) Mono-functional liquid reactive phosphorus flame retardant for epoxy resins
Exolit RP 607 Specially treated and stabilized red phosphorus powder
Exolit RP 614 PC Stabilized, micro encapsulated red phosphorus as a wet filtercake
Exolit RP 6500 Thixotropic dispersion (carrier: epoxy resin) of red phosphorus
Exolit RP 6520 Thixotropic dispersion (carrier: castor oil) of red phosphorus
Exolit 855 (LP) Pre condensed partial phosphoric ester
Exolit 5060 PK Organic halogen free phosphorus flame retardant, especially for incorporation into viscose fibres (press cake)
Viscofil®-Exolit 5060 Organic halogen free phosphorus flame retardant, especially for incorporation into viscose fibres (dispersion)