WATER-SOLUBLE, FILM-FORMING INORGANIC COMPOUNDS, FIREPROOF AND FIRE-RESISTANCE COMPOSITES AND FIRE-RESISTANCE, FLEXIBLE, SHEET COMPOSITE COVERING MATERIALS FORMED BY THE USE OF THE COMPOUNDS, AND FIRE-RESISTANCE-COVERING PROCESS

摘要

Water-soluble film-forming inorganic compounds having a specific gravity of 1.1 or more and capable of being formed into a film at ambient temperature or by heating. The compounds are formed by a reaction of a metal, a hydroxide of an alkali metal, and hydrofluoric acid or boric acid and their salts or their submineral acid salts. The watersoluble film-forming inorganic compounds which are superior in refractory, heat-resistance and heat-insulating properties, also have rust-inhibitory properties. The compounds are useful as heat-resistant adhesives in fireproof and heat-resistant layered composites made of metal, wood, and the like. A process of coating materials with a layer of these compounds is also provided.