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Flame-retardant polyurethanes from phosphorus-containing isocyanates

✍ Scribed by Ying-Ling Liu; Ging-Ho Hsiue; Chih-Wein Lan; Yie-Shun Chiu

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
264 KB
Volume
35
Category
Article
ISSN
0887-624X

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✦ Synopsis

Phosphorus-containing polyurethanes are synthesized by reacting phosphorus-containing diisocyanates, bis(4-isocyanatophenoxy) phenyl phosphine oxide (BIPPO) and bis(3-isocyanatophenyl)phenyl phosphine oxide (BIPPPO), with various diols. The chemical structures of the obtained monomers and polymers are characterized by IR, 1 H-and 31 P-NMR spectroscopy. Thermal analysis of the phosphorus-containing polyurethanes reveals that incorporating phosphorus into the polymers increases exothermicity during their decomposition. According to these results, the phosphorus-containing polyurethanes are less thermally stable than conventional polyurethanes. Char yield and LOI measurements demonstrate that incorporating phosphorus into polyurethanes markedly improves their flame retardancy.

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