Process for producing phosphazene fire retardant and product

Details Process for producing phosphazene fire retardant and product Process for producing phosphazene fire retardant and product

1974-12-05

1976-08-10

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260973, C07C 915

Patent

active

039742423

ABSTRACT:
A process for producing fire retardant phosphonitrilate polymers by reacting phosphonitrilic halide with a hydroxyl compound such as an aliphatic or aromatic alcohol at not more than about 40.degree.C in the presence of an acid acceptor, such as pyridine, under conditions such that a relatively low concentration of the hydroxyl compound is present during the initial 1/2 to 3 hours of the reaction and the reaction conditions are maintained at from 20.degree.-50.degree.C for a period of 1/2 to 120 hours and, optionally, further heating the reaction mixture to a temperature of 40.degree.-80.degree.C for 1/2 to 81/2 hours. The phosphonitrilate polymers are suitable for fire retarding cellulosic materials such as regenerated cellulose, rayon and the like.

REFERENCES:
patent: 2214769 (1940-09-01), Lipkin
patent: 3845167 (1974-10-01), Franko-Filipasic et al.

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