Phosphorus-nitrogen containing fire retardants for poly(butylene terephthalate)

Hexakis(phenylamino)cyclotriphosphazene, hexakis(phenoxy)cyclotriphosphazene, tris(o‐phenylenediamino)cyclotriphosphazene, tris(phenylene‐1,2‐dioxy)cyclotriphosphazene and tris(phenylene‐1‐amino‐2‐oxy)cyclotriphosphazene have been prepared and characterized by IR and NMR spectroscopy. Phospham, a cr...

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Bibliographic Details
Published in:Polymer international 2000-10, Vol.49 (10), p.1095-1100
Main Authors: Levchik, Galina F, Grigoriev, Yury V, Balabanovich, Alexander I, Levchik, Sergei V, Klatt, Martin
Format: Article
Language:English
Subjects:
Applied sciences
Compounding ingredients
Exact sciences and technology
fire retardancy
Fireproof agents
phosphazene
poly(butylene terephthalate)
Polymer industry, paints, wood
Technology of polymers
thermogravimetry
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Summary:Hexakis(phenylamino)cyclotriphosphazene, hexakis(phenoxy)cyclotriphosphazene, tris(o‐phenylenediamino)cyclotriphosphazene, tris(phenylene‐1,2‐dioxy)cyclotriphosphazene and tris(phenylene‐1‐amino‐2‐oxy)cyclotriphosphazene have been prepared and characterized by IR and NMR spectroscopy. Phospham, a crosslinked phosphazene imide (PN2H) n, was prepared by heating hexaminotricyclophosphazene under vacuum. Phosphorus oxynitride (PON) m which is likely to be a crosslinked oxyphosphazene was prepared by intense heating of urea, melamine and phosphoric acid. These phosphorus–nitrogen containing compounds added to poly(butylene terephthalate) (PBT) at 10–20 wt% provided increase of oxygen index (OI) from 22 to 29. In spite of relatively high OI only the V‐2 rating was observed in the UL94 test because of the flaming drip phenomenon. Phosphorus oxynitride was found to be an efficient char promoter for PBT. © 2000 Society of Chemical Industry
ISSN:0959-8103
1097-0126
DOI:10.1002/1097-0126(200010)49:10<1095::AID-PI405>3.0.CO;2-B