25µm Environmental Ammonium Polyphosphate App Powder

Catalog NumberACMA00024450

CategoryAmmonium Polyphosphate

Description	Degree of polymerization about 100
Solubility	<1.5%(10% aq., at 25ºC)
Appearance	White Powder
Application	Used to prepare many kinds of high-efficiency expanding-type flameproof coating, adhesive, bond, the flameproof treatment for multistory building, trains, etc. Make into powder extinguishing agent to be used in large-area outfire for forest, oil field and coal field, etc. Used in the flameproof treatment for woods, plywood, fiberboard, papers, fibers, etc.
Storage	In dry and cool place, keeping out of moisture and sunshine, shelf life two years.
Content	P2O5 content ≥67.5%; P content≥67.5%; N content ≥13%
Moisture Content	<0.3%
Packaging	25kg/bag, 24mt/20'fcl without pallets, 20mt/20'fcl with pallets
Particle Size	15~25µm
pH	pH value ( 10% aq., at 25ºC):6.0-8.0

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Case Study

Ammonium Polyphosphate and Polymer Synergist Used in Intumescent Flame Retardant System for Polypropylene

Xu, Zhao-Zan, et al. Polymer Degradation and Stability, 2013, 98(10), 2011-2020.

A highly efficient flame retardant polymer synergist PTPA was designed and synthesized, and a new intumescent flame retardant (IFR) was prepared by compounding it with ammonium polyphosphate (APP).
· Preparation of Flame-Retardant PP Samples
This work designed and synthesized the efficient flame retardant polymeric synergist poly[N4-bis(ethylenediamino)-phenyl phosphonic-N2, N6-bis(ethylenediamino)-1,3,5-triazine-N-phenyl phosphonate] (PTPA) using cyanuric chloride together with ethylenediamine and phenylphosphonic dichloride as starting materials.
Different PP/APP/PTPA samples were produced using a parallel co-rotating twin-screw extruder featuring a 40 length/diameter ratio and a 25 mm screw diameter. The extrusion of PP/FR samples occurred at 190 °C with a screw speed set to 80 RPM. The LOI and UL-94 test specimens received compression molding from a vulcanizing press at 200 °C which applied 10 MPa force for 3 minutes to create 3.2 mm thick plaques.
· Evaluation of Flame Retardancy
PP demonstrated enhanced flame retardancy when combined with PTPA and APP. PP containing 25 wt% IFR (APP:PTPA = 2:1 in weight) achieved an LOI value of 34.0% and UL-94 V-0 rating while it also reduced the heat release rate by 85% and smoke production rate by 79%. The IFR concentration could decrease to its minimum level of 18 wt% which achieved a LOI value of 32.1% and earned a UL-94 V-0 rating. Examined results demonstrated chemical interactions between the breakdown products of PTPA and APP that contributed to stable char layer creation. The PP/APP/PTPA mixture produced dense char residue which demonstrated a significant intumescent ratio. Data analysis showed PTPA and APP exhibited outstanding synergistic interactions.

Ammonium Polyphosphate and Single-Walled Carbon Nanohorns Synergistic Flame Retardant Coating Material for Cotton Fabrics

Xu, Jie, et al. Chemical Engineering Journal, 2023, 451, 138566.

In order to develop an environmentally friendly flame retardant with low addition amount and high flame retardancy for textiles, this work proposed a synergistic flame retardant system combining a new carbonaceous nanomaterial, single-walled carbon nanohorns (SWCNHs), with ammonium polyphosphate.
Evaluation of flame retardancy of cotton-APP/SWCNH composites
· At a SWCNHs addition of 0.15 % the material achieved LOI values of 27.5 ± 0.83 % and showed damage length reduction from 30 ± 0.01 % cm to 6.5 ± 0.06 % cm.
· SEM analysis revealed that Cotton-APP/SWCNHs (0.15) maintained their woven structure post-vertical flammability test.
· The cone calorimeter test revealed that Cotton-APP/SWCNHs (0.15) demonstrated significant reductions in pHRR by 92.22 % and THR by 58.44 %.
· The flame retardant mechanism analysis showed SWCNHs incorporation into APP coatings leads to dense graphitized carbon layer formation on cotton fabric surfaces while blocking combustible volatile generation which improves flame retardancy of cotton fabrics.

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