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Phospham—A stable phosphorus‐rich flame retardant
Author(s) -
Weil Edwar D. D.,
Patel Navin G.
Publication year - 1994
Publication title -
fire and materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.482
H-Index - 58
eISSN - 1099-1018
pISSN - 0308-0501
DOI - 10.1002/fam.810180102
Subject(s) - fire retardant , phosphorus , poison control , environmental science , human factors and ergonomics , occupational safety and health , forensic engineering , injury prevention , waste management , engineering , materials science , environmental health , composite material , medicine , metallurgy , pathology
Phospham is an iminophosphazene polymer of unusually high thermal stability. We have found that phospham imparts a substantial level of flame retardancy to nylon‐4,6, a high‐melting crystalline engineering thermoplastic. It did not appear to produce degradation of the polyamide in the processing temperature range. The flame retardant efficacy of phospham in nylon‐4,6 was similar to that of stabilized red phosphorus, when compared on an equal phosphorus basis. In nylon‐4,6, it did not display nitrogen–phosphorus synergism. Limited evidence from TGA suggested a condensed phase mode of action in nylon‐4,6. Phospham showed orders‐of‐magnitude better hydrolytic stability than did ammonium polyphosphate, and did not produce detectable phosphine on processing as did red phosphorus.