Process for the preparation of polyphosphates of organic bases

Details Process for the preparation of polyphosphates of organic bases Process for the preparation of polyphosphates of organic bases

2011-02-22

2011-02-22

Shiao, Rei-tsang (Department: 1628)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

C252S609000

Reexamination Certificate

active

07893142

ABSTRACT:
A simple and economical process for the preparation of polyphosphates of organic bases consists of reacting a mixture of phosphorus pentoxide and at least one organic nitrogen base with at least one compound which releases water accompanied by decomposition under the prevailing conditions in such a molar ratio that upon decomposition of the water-releasing compound at most essentially 2 mol. water are produced per mol. phosphorus pentoxide. Thus-prepared polyphosphates are particularly suitable as flame-protection agents for plastics.

REFERENCES:
patent: 4670483 (1987-06-01), Hall et al.
patent: 6114421 (2000-09-01), Malcangi
patent: 6146557 (2000-11-01), Inata et al.

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