PRODUIT A STRUCTURE MOUSSE ISSU DE SILICATES METALLIQUES ALCALINS, SON PROCEDE D'OBTENTION ET

摘要

1401321 Foamed silicates SOUTHWEST RESEARCH INSTITUTE 23 June 1972 [9 July 1971] 29678/72 Heading C1A A foamed product is made from a mixture of a surface tension depressant and an aqueous soln. of sodium silicate by high speed mixing with a gas at greater than atmospheric pressure to form a wet foam having density <43 lb/ft.3, an average cell size <240 microns, an average cell wall thickness <24 microns and at least 50 cells per mm.3, and reacting the wet foam with a silicon dioxide polymer forming agent selected from the compounds specified in Claim 1 in an amount sufficient to make the product rigid and resistant to water solubilization. The dry foam has a density of <20 lb/ft.3, an average cell size of <300 microns, an average wall thickness of <16 microns and at least 50 cells/ mm.3. The foam may be modified by containing up to 4% by wt. of fibrous filler and can be forced through a conduit on to a surface prior to it becoming rigid.