Compositions – Fire retarding
Reexamination Certificate
2005-07-19
2005-07-19
Langel, Wayne A. (Department: 1754)
Compositions
Fire retarding
C252S389410, C423S277000, C501S096400, C514S064000, C564S008000
Reexamination Certificate
active
06919036
ABSTRACT:
A family of borate compounds containing an isolated (finite) nonaborate anion with the structural formula [B9O12(OH)6]3−. Preferred amine nonaborate compounds have a resolved oxide formula of A2O.3B2O3.2H2O, where A is the monovalent cation of an amine salt, such as guanidinium and imidazolium. Also provided is a method for preparing these compounds by crystallization from an aqueous solution under mild conditions without the formation of significant amounts of by-products. These compounds have potential application as precursors for the production of advanced boron nitride ceramic materials, and as flame retardants, corrosion inhibitors, and biocides.
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Ganderup Kurt R.
Langel Wayne A.
U.S. Borax Inc.
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