Method for preparing melamine salt of pentaerypolyol...

Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system

Reexamination Certificate

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C558S074000

Reexamination Certificate

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11443293

ABSTRACT:
A method for preparing a melamine salt of pentaerypolyol phosphoric acid is provided. The method comprises the following steps of: ball milling a mixture of pentaerypolyol and phosphorus pentoxide (P2O5) under a solvent-free reacting environment to obtain a pentaerypolyol phosphoric acid, and ball milling a mixture of a pentaerypolyol phosphoric acid and melamine without organic solvent reacting environment to obtain a melamine salt of pentaerypolyol phosphoric acid.

REFERENCES:
patent: 4454064 (1984-06-01), Halpern et al.
patent: 4478998 (1984-10-01), Halpern et al.
patent: 6737526 (2004-05-01), Ma et al.
patent: 6833467 (2004-12-01), Ma et al.
patent: 591032 (2004-06-01), None
patent: I221474 (2004-10-01), None

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