Flame retardant ammonium polyphosphate APP(n=1000)

Flame retardant ammonium polyphosphate APP (n=1000) is an inorganic phosphorus based flame retardant with a chemical formula of(NH₄)ₙ₊₂PₙO₃ₙ₊₁（n=1000）, belonging to ultra-high molecular weight insoluble ammonium polyphosphate. Its appearance is white nanoscale powder (particle size D50=2-5 μ m), with extremely high thermal stability (decomposition temperature>400 ℃), moisture absorption<0.1%, and flame retardant efficiency increased by more than 30%. It has high content of P and N flame retardant elements .Flame retardant can be used in intumescent fireproof coatings, such as polyurethane, UP resin and epoxy resin. Flame retardant ammonium polyphosphate APP(n=1000) can also be used in the retardant of fiber, wood and plastic products. Due to its high molecular weight(n>1000) and good heat stability, it can be used as main ingredient of expanding retardant thermoplastic. Especially used in the PP achieving UL94-V0 for electronic unit and intumescent fire retardant coatings.

Physical and Chemical Properties

Core Technology:

Advantages of ultra-high molecular weight:

A polymerization degree of n=1000 forms a dense network like molecular structure, which, compared to ordinary APP (n=200-500):

Improved migration resistance by 5 times, no precipitation or crystallization after long-term use;

Improved thermal stability by over 100 ℃, able to withstand high temperature environments (such as industrial kilns, aerospace engine peripheral materials);

Better compatibility with polymer substrates, forming a "molecular level flame retardant network" after dispersion, without affecting the transparency and mechanical properties of the material.

Triple flame retardant mechanism:

1. Gas phase flame retardant: releases a large amount of ammonia gas (NH3) at high temperatures, diluting the oxygen concentration to below the critical combustion value;

2. Condensed phase flame retardant: Generate a phosphoric acid polyphosphate melt layer, covering the surface of the material to block heat conduction;

3. Free radical capture: Capture active free radicals such as hydroxyl (· OH) and hydrogen (· H) generated during the combustion process to terminate the chain reaction.

Application areas:

1. Aerospace and Defense Industries

composite material

special paint

2. New energy industry

Lithium battery packaging

Photovoltaic materials

3. Ocean Engineering and Ships

Ship interior

Deep sea pipeline

4. High end electronics and semiconductors

Chip packaging materials

Server rack

Packing and store:packing: 25kg/bag compound paper & plastic bag, or jumbo bag.

Store: storing in dry, ventilated and moistureproof conditions.

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