Compositions – Fire retarding – Having disparate function
Patent
1997-12-08
2000-05-30
Lovering, Richard D.
Compositions
Fire retarding
Having disparate function
106 1812, 106601, 106605, 252 62, 252606, 264 42, C09K 2102, E04B 188
Patent
active
060687959
ABSTRACT:
A fire resistant, acoustic and thermally insulative product consists essentially of a silica-containing refractory solid in finely divided or powdered particulate form, present in an amount sufficient to intumesce to a predetermined volume when exposed to a predetermined amount of heat. The product further consists essentially of an aqueous sodium silicate solution present in an amount sufficient to act as an agent in producing a foaming process whereby the finely divided solid is so bonded as to form a cellular structure. The product produces substantially no toxic fumes or gases upon exposure to excessive heat or fire. A process for producing the product comprises the steps of mixing silica sand and a sodium silicate solution at a predetermined weight ratio of sand to solution; placing the mixture in a mold at a predetermined mold depth; and placing the mold in a furnace at a temperature sufficient to facilitate foaming, and for an amount of time sufficient to increase the volume of the mixture to a predetermined volume, thereby forming a fire resistant product which is a lightweight, porous material comprising millions of small, closed cells.
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