Hydrogen phosphonates and polymers containing them as flame reta

Details Hydrogen phosphonates and polymers containing them as flame reta Hydrogen phosphonates and polymers containing them as flame reta

1976-09-03

1978-02-14

Czaja, Donald E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260927R, 260937, C07F 908, C08K 553

Patent

active

040737675

ABSTRACT:
The present invention relates to cyclic phosphorus compounds and processes for the preparation thereof.
The present invention relates to a process for the preparation of certain derivatives of cyclic hydrogenphosphonates. Azomethine, sulfonyl isocyanate, isocyanate, and isothiocyanate derivatives are a part of the present invention.
The cyclic phosphorus compounds are useful as flame retardants with organic polymers, such as polyurethanes, polyesters, and polyamides.

REFERENCES:
patent: 2957856 (1960-10-01), Guest et al.
patent: 3413382 (1968-11-01), Ulrich
patent: 3887655 (1975-06-01), Shim
patent: 3966849 (1976-06-01), Noetzel et al.
patent: 3978167 (1976-08-01), Albright
patent: 3997505 (1976-12-01), Albright
patent: 4007236 (1977-02-01), Duffy et al.
Sebring-- Chem. Abs. 79, 115722k (1973).

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