METHOD OF MAKING LIGHTWEIGHT REFRACTORY COMPOSITION AND ARTICLES USING FOAMED COLLOIDAL SILICA BINDER

Abstract: a foamed colloidal silica binder having a total porosity of about 50% to about 95% by volume can be used to make porous refractory compositions and refractory articles having a porosity of about 25% to about 75% by volume. the foamed colloidal silica binder endures mixing with refractory ingredients to form the porous refractory composition, casting the refractory composition into a refractory shape, and drying the shape to form to refractory article, without significant collapsing of the foam. the resulting lightweight refractory articles are useful in a wide variety of insulating and weight-reducing applications.

Inventor(s): Dominic Pautler

CPC Classification: C04B28/24 (containing alkyl, ammonium or metal silicates; containing silica sols {(reaction mixtures resulting in mineral polymers ; polymeric reaction products of alkali metal silicates with isocyanates )})

Search for rejections for patent application number 20250187983