Preparation of guanidine phosphate for hardboard flame retardant

Details Preparation of guanidine phosphate for hardboard flame retardant Preparation of guanidine phosphate for hardboard flame retardant

1979-12-14

1981-06-16

Sebastian, Leland A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

252607, 428541, 428921, 562555, 564 59, 564241, C08L 100, C09K 328

Patent

active

042736870

ABSTRACT:
A guanidine phosphate composition containing both monoquanidine phosphate and diguanidine phosphate and characterized by a weight loss of less than 1% when heated for one hour at 220.degree. C. is prepared by mixing together about equimolar quantities of phosphoric acid and cyanoguanidine and heating this reaction mixture with agitation in the presence of a surfactant to a temperature in the range of 200.degree. C. to 240.degree. C. Agitation is continued for two hours at 200.degree. C. or until foaming stops (about one hour at 240.degree. C.). The guanidine phosphate composition so obtained may be applied to cellulosic materials to render them fire retardant.

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