Exolit® AP 765 (TP)
Intumescent system based on APP, especially for polyolefin reinforced and extrusion application

Exolit® AP 765 (TP)

Intumescent system based on APP, especially for polyolefin reinforced and extrusion application

Edition Date :
July 14, 2020
Exolit AP 765 (TP) is a non-halogenated flame retardant based on phosphorus and nitrogen synergism. The product achieves its flame retardant effect through intumescence. The thermoplastic material foams and crosslinks on exposure to flame and forms a stable char at the surface acting as a barrier. The protective layer provides a heat-insulation effect, reduces oxygen access and prevents dripping of molten polymer.

  • Non-halogenated flame retardant based on phosphorus and nitrogen synergism, that achieves its flame retardant effect through intumescence
  • Non-halogenated flame retardant with favorable environmental and health profile
  • Suited for PP, PE, PP copolymers and PP blends for injection moulding and extrusion applications
  • Low smoke density and low smoke gas corrosivity
  • Good electrical and mechanical properties
  • Excellent UV stability    
  • Good recyclability





For regulatory details such as the classification and labeling as dangerous substances or goods please refer to our corresponding Material Safety Data Sheet.
CharacteristicsUnit   Target ValueDS¹)TD²)Test Method 
Phosphorus % (w/w)   23.0 - 25.0  

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

Karl-Fischer titration; (11/21)  
Nitrogen  % (w/w)   18.0 - 20.0  

Elemental analysis; (11/07)  
Density  g/cm³   approx. 1.8  

at 20°C  
Bulk Density  g/cm³   approx. 0.6  

Decomposition Temperature  °C   > 250   

Particle Size Distribution% (w/w)    

Laser diffraction  
 > 100 µm   max. 0,5      
 d50 (µm)   approx. 10      
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.  
Exolit AP 765 (TP) was developed especially for use in polyolefins. It is suited for PP, PE, PP copolymers and PP blends for injection moulding and extrusion applications.

In PP homopolymer and copolymer, a dosage of 23 to 26 % (by wt.) Exolit AP 765 (TP) is usually sufficient to obtain the UL 94 V-0 classification at 1.6 mm together with GWFI 960°C and GWIT 800°C.
The mechanical properties of plastics are slightly altered by addition of Exolit AP 765 (TP) due to the filler like type of the flame retardant.
Subject to the polymer grade, processing conditions and reinforcements, the dosage of the flame retardant may vary.

The optimum conditions for incorporating should be determined in each individual case. Care must be taken to ensure homogeneous dispersion of all components. Both single- and twin-screw extruders are suitable for incorporating the product. The temperature of the polymer melt should not exceed 250°C.

To prevent degradation effects by high shear energy, it has proved an advantage to use machines of less shear-intensive design. When a water bath is used for cooling the strands, it is advisable to keep the passage through the water bath as short as possible to permit optimum evaporation of any entrained water. In some cases, depending on production conditions, it may be necessary to dry the granules obtained.

The mixing and processing methods customary in powder processing of polymers can be used with Exolit AP 765 (TP).
The VDI Guideline 2263 “Prevention of dust fires and dust explosions” or the relevant national regulations must be observed.
Delivery form
White powder

Exolit AP 765 (TP) is delivered in 20 kg bags / 1.000 kg shrink-wrapped pallet.

Dispatch and Storage
Exolit AP 765 (TP) is non-hygroscopic. However, when stored in open container, the product can still absorb small amounts of moisture owing to the high surface area of the powder. Plastic granules containing Exolit AP 765 (TP) also absorb small amounts of water after processing, depending on storage conditions. It is therefore advisable to store plastic granules containing Exolit AP 765 (TP) in sealed containers at room temperature in a dry place. Partially emptied containers should be carefully resealed after use. 

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

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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.<br />
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