C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
402/355
C08G 79/02 (2006.01)
Patent
CA 1038545
A B S T R A C T Poly(haloaryloxyphosphazenes) which consist of recurring units represented by the following general formula Image in which n is between 20 and 50,000 and R1, R2 and R3 are monovalent radicals selected from the group consisting of H, Cl, Br, and alkyl (one to five carbon atoms) and at least one R group is halogen, the improvement which comprises the formation of the polymer by reaction of poly(dichloro- phosphazene) with a stoichiometric excess of alkali metal salt of a phenol substituted in at least one of the meta or para positions at a temperature and length of time between about 115°C for 100 hours and about 160°C for about 5 hours, whereby a poly(haloaryloxyphosphazene) product free from P-Cl sites and soluble in tetrahydrofuran is obtained. The polymers of this invention are film formers, which often can be rendered into fibers. Many of these poly(aryloxyphosphazenes) are particularly useful in flame-retardant appli- cations in the form of wire insulation, structural composites, carpet backing and in wearing apparel. Because the homopolymers of this invention are free of P-Cl sites (i.e. less than 0.1% chlorine at P-Cl), the polymers may be safely utilized in moist environments.
201737
Reynard Kennard A.
Rose Selwyn H.
LandOfFree
Process for the preparation of poly (haloaryloxyphosphazene)... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the preparation of poly (haloaryloxyphosphazene)..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the preparation of poly (haloaryloxyphosphazene)... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1069327