Compositions – Fire retarding – Having disparate function
Patent
1980-02-11
1982-08-03
Lovering, Richard D.
Compositions
Fire retarding
Having disparate function
106 1816, 252 62, 252607, 423309, 428921, C09K 328, C09D 518
Patent
active
043426697
ABSTRACT:
A method for producing a fire retardant insulating composition in which a fire retardant amount of monoammonium phosphate (MAP) having polyphosphate content of the range about 0 to about 10 weight percent is incorporated into a cellulose-base insulating material to produce a nontacky, fire retardant insulating composition. In an embodiment of the invention the monoammonium phosphate having a polyphosphate content in the range of up to about 10 weight percent is prepared by (1) contacting NH.sub.3 with an aqueous solution of H.sub.3 PO.sub.4 at a temperature of up to 177.degree. C. to form MAP and allowing the MAP thus formed slowly to cool to a temperature in the range of about 54.degree. to 104.degree. C. In another method for preparing MAP having a polyphosphate content in the range of up to about 10 weight percent a commercial aqueous ammonium phosphate fertilizer solution is treated by contacting it with an aqueous solution of H.sub.3 PO.sub.4 in an amount sufficient to adjust the pH of the solution to about 3.0 and thereafter heating the solution to a temperature of about 100.degree. C. for a time sufficient to obtain a pH of about 4.0 for the solution and subsequently allowing the MAP formed to cool slowly to a temperature in the range of about 54.degree. to about 104.degree. C. A fire retardant, insulating composition made using the methods above.
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Achorn et al., "Commercial Uses of the Pipe Reactor Process for Production of High-Polyphosphate Liquids", Solutions, Mar.-Apr. 1973, pp. 46, 48, 52, 54.
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Parish Robert S.
Wilson Joseph F.
Lovering Richard D.
Phillips Petroleum Company
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