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US 12,421,172 B2Granted
Refractory foam
AssigneeZYP Coatings, Inc.
InventorsCressie E. Holcombe, Jr., Patrick J. Ritt, William Brent Webb
Life of this patent
Estimating the term…
Abstract
A porous refractory in the K2O—SiO2—B2O3 system is formed by chemical direct foaming by heating to over 600° C., resulting in adherent black or white foam. The foam can function as highly porous thermal insulation, a high or low thermal emissivity surface, as a sealant for deteriorated refractory surfaces, as a filler for pockmarks/holes/gaps or as a bonding agent for parts with large gaps between them.
Claims3
A coating composition comprising:
- a mixture of potassium tetraborate tetrahydrate, ammonium pentaborate tetrahydrate, colloidal silica aqueous dispersion, and water, wherein heat-firing the mixture leads to a composition of K2O—SiO2—B2O3, and wherein drying and heating the composition of K2O—SiO2—B2O3 to a temperature above 600° C. forms a black refractory foam, and an additive comprising hollow borosilicate spheres or zinc oxide.
Dependencies are inferred from the claim text.