Process for making pulverulent ammonium polyphosphates stable to

Details Process for making pulverulent ammonium polyphosphates stable to Process for making pulverulent ammonium polyphosphates stable to

1984-04-23

1987-01-27

Lechert, Jr., Stephen J.

Compositions

Fire retarding

For solid synthetic polymer and reactants thereof

106 1815, 106 1816, 106 1821, 106 1831, 106 1832, 252610, 521 85, 521106, 521907, 523200, 523208, 523210, 524416, 524594, C09K 2104, C09K 2110, C08K 328, C08K 332

Patent

active

046393315

ABSTRACT:
The disclosure relates to a process for making a particulate agent stable to hydrolysis based on free-flowing, pulverulent ammonium polyphosphate by treating the ammonium polyphosphate with a thermosetting, artificial resin being water-insoluble when cured. More specifically, the disclosure provides for the ammonium polyphosphate, an aliphatic alcohol as a diluent, and a melamine/formaldehyde-resin or phenol/formaldehyde-resin to be placed in an autoclave and intimately mixed at room temperature; for the mixture to be heated to a temperature of about 80.degree. to about 180.degree. C. and allowed to remain over a period of 15 to 240 minutes at that temperature and under the pressure corresponding to the vapor pressure of the diluent; for the diluent to be separated and for the product so obtained to be dried.

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