Ammonium polyphosphate, APP

The appearance of ammonium polyphosphate is white powder, which is close to neutral and can be mixed with any other substances, but it does not undergo chemical changes.

Ammonium polyphosphate is a polyphosphate containing N and P, referred to as APP. At different polymerization, it can be divided into three types: low polymerization, medium polymerization and high polymerization. When the degree of polymerization is below 20, it is called oligomerization and is water-soluble. When the degree of polymerization is above 50, it is called polymerization and can be used as a flame retardant. In the 1980s, considering factors such as price and cost, oligomeric water-soluble APP was mainly used for flame retardancy on cellulosic materials such as paper and wood. High polymerization ammonium polyphosphate is widely used in intumescent fire retardant coatings, polyethylene, polypropylene, polyurethane, epoxy resin, rubber products, fiberboards and dry powder fire extinguishing agents. It is a safe and efficient nitrogen-phosphorus non-halogen smoke suppressant. Flame retardants.