C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
18/670, 403/82
C08L 85/02 (2006.01) B29D 27/00 (1980.01)
Patent
CA 1080400
ABSTRACT This invention relates to fire-resistant polyphosphazene polymers which exhibit a high degree of flame retardancy, and which do not generate large amounts of smoke or toxic products when ignited or exposed to relatively high temperatures. More specifically, it relates to low density polyphosphazenes as foams and coating materials with outstanding thermal stability and to vulcanizable compositions of poly(phosphazenes) and insulating foams made therefrom. Additionally, the invention provides a process for the preparation of fire retardant, low smoking, thermally stable oil resistant vulcanizates and closed cell foams which are made from the poly(phosphazenes) polymers described above. To process comprises preparing a suitable mixture; milling the mixture; cutting the product to a preform charge; and either molding said preform charge under heat and pressure to produce a vulcanizate or molding said preform charge to produce a procured slab which is expanded and vulcanized in an oven to pro- duce a foam.
337895
Sicka Richard W.
Thompson James E.
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