Exolit AP 422 полифосфат аммония

EXOLIT AP 422 - полифосфат аммония производства компании Clariant. Представляет собой мелкодисперсный белый порошок белого цвета, практически нерастворимый в воде и полностью не растворимый в органических растворителях. 

Полифосфат аммония - важнейший компонент в производстве огнезащитных вспучивающихся красок и покрытий.

Компания Clariant - мировой лидер в производстве специальной химиии в области огнезащиты.

Product Data Sheet 

Exolit AP 422

Product Description 

Exolit AP 422 is a fine-particle ammonium polyphosphate produced by a special method. The product is largely insoluble in water and completely insoluble in organic solvents. It is colourless, non-hygroscopic and non-flammable. Exolit AP 422 differs from most other commercial products in the following ways: - greatly reduced solubility in water - lower viscosity in aqueous suspensions - lower viscosity in PU polyol suspensions - very low acid number 

Delivery Specification and Technical Data 

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. 0.25  
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    5.5 - 7.5  
Potentiometry in 10 % aqueous suspension; (11/12) 
Solubility in Water  % (w/w)   max. 0.5  
Gravimetry after filtration of a 10 % aqueous suspension at 25 °C; (11/41)  
Acid Number  mg KOH/g   max. 1  
Titration using alkali in 10 % aqueous suspension; (11/11)  
Decomposition Temperature  °C   > 275  
initial evolution of ammonia  
Average Particle Size (D50)  µm   approx. 15  
 
Particle Size Distribution  % (w/w)  
Air jet sieving; (11/02)  
> 100 µm max. 0.2 (DS)
< 50 µm   min. 95 (TD)  
Weight Loss  % (w/w)  
 
350 °C   approx. 5  
450 °C   approx. 10  
550 °C   approx. 20  

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 

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Intumescent coatings

On account of its low water solubility, Exolit AP 422 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 EN, DIN, BS, ASTM and others.
The application of Exolit AP 422 based intumescent coatings on wood or plastics enables these materials to qualify for Building Material Class B (DIN EN 13501-1).

Exolit AP 422 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 422 is a suitable non-halogenated flame retardant for polyurethane foams. If handling of Exolit AP 422 as a solid is not possible we recommend the dosage of the flame retardant by preparing an Exolit AP 422/polyol-suspension. Because of the low acid number of Exolit AP 422, it is also possible to incorporate this flame retardant in an Exolit AP 422/isocyanate suspension.

To prevent the solids from settling, the Exolit AP 422 suspensions should be stirred or circulated by pump. The stirrers commonly found in service tanks are adequate for this purpose.
___
Other applications

Exolit AP 422 has an excellent flame-retardant effect in cellulose-containing materials such as paper and wood products. With chipboard products, the DIN EN 13501-1 classification can be achieved by adding 15 - 20 % Exolit AP 422.

Because of its high heat stability, Exolit AP 422 is an essential component in intumescent formulations for thermoplastics, particularly polypropylene, for which the classification UL 94-V0 is specified for applications in the electrical sector.

Casting resins based on epoxy resins or unsaturated polyester resins achieve the classification UL 94-V0 with Exolit AP 422. 

Safety and Handling

For regulatory details such as the classification and labeling as dangerous substances or goods please refer to our corresponding material safety data sheet.

Minimum shelf life is 12 months from the date of shipping when stored according to the said conditions. 

Dispatch and Storage 

Packaging 

GGVE/RID     Exolit AP 422 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.
Exolit AP 422 can also be supplied in a variety of big bags, shrink-wrapped. 
GGVS/ADR    
ADNR    
IMDG-Code    
UN Number    
IATA-DGR    
see Material Safety Data Sheet 

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