Crosslinked phenoxyphosphazene compounds, flame retardants, flame-retardant resin compositions, and moldings of flame-retardant resins
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United States of America Patent
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Jul 22, 2003
Grant Date -
May 15, 2003
app pub date -
Aug 12, 1999
filing date -
Oct 15, 1997
priority date (Note) -
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Abstract
This invention has an object of providing a flame retardant which advantageously has a high melting point and a low volatility and is unlikely to depress the inherent properties of resins. The flame retardant of the invention is a phosphazene compound crosslinked with a crosslinking group such as phenylene group, each of the crosslinking groups being interposed between the two oxygen groups left after the elimination of phenyl groups from the phosphazene compound, the amount of the phenyl groups in the crosslinked compound being 50 to 99.9% based on the total number of the phenyl groups in the phosphazene compound. The invention also provides a resin composition containing the flame retardant, and a molded article of the resin.
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