Crosslinked phenoxyphosphazene compounds, flame retardant,...

C - Chemistry – Metallurgy – 08 – G

Patent

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Details

C08G 79/02 (2006.01) C08G 75/02 (2006.01) C08K 5/5399 (2006.01) C08L 85/02 (2006.01) C08L 101/00 (2006.01) C09K 21/14 (2006.01)

Patent

CA 2275247

A flame retardant which is free from halogen, has a high melting point and low volatility, and does not lower the characteristics inherent in resins, comprising a crosslinked phenoxy-phosphazene compound obtained by crosslinking a phosphazene compound with crosslinking groups such as phenylene groups, wherein each crosslinking group is interposed between the two oxygen atoms left after the elimination of phenyl groups and the amount of the phenyl groups of the crosslinked phosphazene compound is 50 to 99.9 % based on the total amount of the phenyl groups of the phosphazene compound before crosslinking. Further, the present invention also provides resin compositions containing the flame retardant; and moldings of the resin compositions.

L'invention concerne un agent ignifugeant exempt d'halogène, qui présente un point de fusion élevé et une faible volatilité et qui n'affecte pas les caractéristiques inhérentes aux résines. Ledit agent ignifugeant comprend un composé phénoxy-phosphazène réticulé produit par la réticulation d'un composé phosphazène avec des groupes de réticulation comme des groupes phénylènes, chaque groupe de réticulation étant placé entre les deux atomes d'oxygène restants après l'élimination des groupes phényles, et la proportion des groupes phényles du composé de phosphazène réticulé est de 50 à 99,9 % de la quantité totale des groupes phényles du composé phosphazène avant sa réticulation. Par ailleurs, l'invention concerne également des compositions de résine contenant ledit agent ignifugeant ainsi que des moulages formés desdites compositions de résine.

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