Compositions – Fire retarding – For wood or cellulosic material other than textile
Patent
1981-07-22
1983-05-03
Jiles, Henry R.
Compositions
Fire retarding
For wood or cellulosic material other than textile
252601, 252608, 106 1505, 423279, 524405, 568 1, C09D 514, C01B 1512, C08K 505
Patent
active
043820255
ABSTRACT:
This application deals with the discovery of a highly effective new flame retardant, ammoniumtriborate (NH.sub.4.B.sub.3 O.sub.5.3 CH.sub.3 -OH). Tetraborate ores, when treated in a warm methanolic suspension with ammonia and sulfurdioxide (or ammoniumsulfite), undergo a three-step transformation. First, through a displacement reaction, ammoniumtetraborate [(NH.sub.4).sub.2.B.sub.4 O.sub.7.4 H.sub.2 O] and alkali metal or alkaline earth metal sulfite are obtained. As a second step, ammoniumtetraborate spontaneously loses ammonia and transforms into a new compound, ammoniumtriborate (NH.sub.4.B.sub.3 O.sub.5.3 CH.sub.3 -OH). The third step of this reaction series can be initiated by water and heat treatment of ammoniumtriborate which undergoes a molecular change to ammoniumpentaborate (NH.sub.4.B.sub.5 O.sub.8.4 H.sub.2 O).
REFERENCES:
patent: 641801 (1900-01-01), Schroeter
patent: 1308577 (1919-07-01), Calvert et al.
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patent: 2531182 (1950-11-01), Wiseman
patent: 2833623 (1958-05-01), May et al.
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patent: 3378381 (1968-04-01), Draganov
Kimura, Chem. Abs. 84: 151530h.
Brown, CA: vol. 73, 47143w.
Jiles Henry R.
Whittenbaugh Robert C.
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