Exolit® AP 423

Micronized APP (phase II) with extremely low water solubility

Edition Date :
January 14, 2013

Exolit AP 423 is a fine-particle ammonium polyphosphate produced by a special method. The crystal modification is phase II. The product is largely insoluble in water and completely insoluble in organic solvents. It is a white powder, non-hygroscopic and non-flammable.

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  • Benefits

    • Low solubility in water, low viscosity in aqueous suspensions and a low acid number
    • Suitable as an ”acid donor” for intumescent coatings. Steel structures coated with intumescent paints can meet the requirements of fire resistance classes specified in DIN, BS or ASTM
    • The application of Exolit® AP 423 based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1)
    • Imparts a good flame-retardant effect to adhesives and sealants when incorporated into the base formulation at the rate of 10 - 20%
    • (Bio-)degradable by breaking down to naturally occurring phosphate and ammonia
    • Non-halogenated flame retardant with favourable environmental and health profile

     

  • Safety and MSDS

    For regulatory details such as the classification and labelling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet.

    Contact Us
    Please contact us for safety and regulatory details or the Material Safety Data Sheet (MSDS).
  • Specifications

    Characteristics  Unit   Target value   DS¹)    TD²)  Test method 
    Chemical Formula  [NH4PO3]n
    n > 1000  

    Phosphorus  %(w/w)   31.0 - 32.0  

    Photometry after oxidizing dissolution; (11/17)  
    Water / Moisture  %(w/w)   max. 0.5  

    Thermogravimetry at 130 °C; (11/03)  
    Nitrogen  %(w/w)   14.0 - 15.0  

    Elemental analysis; (11/07)  
    Density  g/cm³   1.9  

    at 25 °C  
    Bulk Density  g/cm³   approx. 0.7  

    Viscosity  mPa*s   max. 100  

    at 25 °C in 10 % aqueous suspension  
    pH Value  5.0 - 7.5  

    Potentiometry in 10 % aqueous suspension; (11/12)  
    Solubility in Water  %(w/w)   max. 1.0  

    Gravimetry after filtration of a 10 % aqueous suspension at 25°C; (11/41)  
    Decomposition Temperature  °C   > 275  

    initial evolution of ammonia  
    Average Particle Size (D50)  µm   approx. 8  

     
    Particle Size Distribution  %(w/w)  

    Air jet sieving; (11/02)  
    < 24 µm   min. 97 (TD)    
    > 50 µm   max. 0.1 (DS)    
    -  
    -    
    -    
    ¹) Delivery specification: The product is monitored on a regular basis to ensure that it adheres to the specified values. Test methods: Clariant method numbers 11/xx in brackets.
    ²) Technical data: The technical data are used solely to describe the product and are not subject to regular monitoring.  
  • Applications

    Intumescent coatings
    On account of its low water solubility, Exolit AP 423 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, 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, BS or ASTM.    

    The application of Exolit AP 423 based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1).

    Exolit AP 423 imparts a good flame-retardant effect to adhesives and sealants when it is incorporated into the base formulation at the rate of 10 - 20 %.

  • Packaging and Handling

    Delivery form
    White powder

    Packaging
    Exolit AP 423 is packed in 25 kg 4-ply paper bags with polyethylene inliner. The standard supply unit is a shrink-wrapped pallet with 40 bags weig­hing 1000 kg net.

    Storage
    Minimum shelf life is 6 months from the date of shipping when stored according to the said conditions.
  • EcoTain

    PeoplePEOPLE
    People
      Non hazardous, studies on life cycle data available.
    People
      Saves lives and assets as a (halogen free) flame retardant.
    PeoplePLANET
    People
      Phosphorus is on the EU list of critical raw materials but recycling is possible and actively investigated.
    People
      Supports the attainability of eco-labels for customer products.

     

      PeoplePERFORMANCE   
      People
        Joint developments with customers on formulations.
      People
        Constant high quality and hydrolytic stability.

       


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    Disclaimer:
    This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application. 
    

    * Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.

    * For sales to customers located within the United States and Canada the following applies in addition: No express or implied warranty is made of the merchantability, suitability, fitness for a particular purpose or otherwise of any product or service.

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