Cross-linked phenoxyphosphazene compound, process for...

Details Cross-linked phenoxyphosphazene compound, process for... Cross-linked phenoxyphosphazene compound, process for...

C - Chemistry, Metallurgy

07

F

C07F 9/08 (2006.01) C07F 9/6581 (2006.01) C07F 9/6593 (2006.01) C08G 79/02 (2006.01) C08J 5/00 (2006.01) C08K 5/5399 (2006.01) C08L 85/02 (2006.01) C08L 101/00 (2006.01) C09K 21/12 (2006.01) C09K 21/14 (2006.01)

Patent

CA 2337872

A flame retardant which has advantages, for example, that it is halogen-free, has a high melting point, is lowly volatile, and does not impair the properties inherent in resins. The flame retardant comprises a cross-linked phenoxyphosphazene compound which is a compound obtained by cross-linking a phosphazene compound with cross-linking groups, e.g., phenylene groups, each cross-linking group being interposed between two oxygen atoms left by phenyl group elimination, and which has no free hydroxyl group (derived from the cross-linking group) in the molecule and contains phenyl groups in an amount of 50 to 99% based on the total number of all the phenyl groups in the phosphazene compound.

L'invention concerne un retardeur de flamme, présentant par exemple l'avantage d'être exempt d'halogène, possédant un point de fusion élevé, faiblement volatil, et n'altérant pas les propriétés inhérentes aux résines. Ce retardeur de flamme comprend un composé de phénoxyphosphazène réticulé, obtenu par réticulation d'un composé de phosphazène avec des groupes de réticulation, par exemple des groupes phénylène, chaque groupe de réticulation étant interposé entre deux atomes d'oxygène résultant de l'élimination d'un groupe phényle, ne possédant pas de groupe hydroxyle libre (dérivé du groupe de réticulation) dans la molécule, et contenant des groupes phényle dans une quantité de 50 % à 99 % sur la base du nombre total de groupes phényle du composé de phosphazène.

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