The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 03, 1982
Filed:
Feb. 11, 1980
Joseph F Wilson, Bartlesville, OK (US);
Robert S Parish, Broomfield, CO (US);
Phillips Petroleum Company, Bartlesville, OK (US);
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.