Water-soluble film-forming inorganic compounds, refractory and a fire resistant composite materials and a fire resistant flexible films - composite materials for that have not been bound resin from these compounds and process for the production of a refractory coating

摘要

This invention is concerned with water-soluble film-forming inorganic compounds having a specific gravity of 1.1 or more and capable of being formed into a film at ordinary temperature or by heating, said compound being formed by a reaction of a metal, a mineral acid compound capable of hydrating accompanied by the dissociation of boric acid or hydrofluoric acid, and an alkali metal, wherein in water or a solution of said mineral acid compound, said metal in solid state reacts with a concentrated solution of said alkali metal, and then said mineral acid compound takes part in the reaction, while reaction temperature is controlled within a temperature range of 50 DEG C to 100 DEG C. The invention also relates to fireproof and heat-resistance layered composites made of metal, wood, and the like with the above-mentioned water-soluble film-forming inorganic compound as adhesive or coating, or in combination with other fastening means.