In order to obtain optimum material performances, the ammonium polyphosphate needs to:

• Be dispersed properly into the polymer
• Be compatible with the polymer matrix
• Be insoluble in water for better weathering performances

Moreover, to facilitate the processing of formulations, APP needs to have:

• Good flowability
• Good thermal stability to provide a larger processing window.

To fullfill all these requirements Budenheim has developed finer and coated APP grades which provide significant improvements in terms of material processability and performances.

The table below gives a list of commercial coated APP grades supplied by Budenheim.