SOL OF INORGANIC-ORGANIC COMPOSITE BODY AND FILM USING IT AS STARTING MATERIAL

摘要

PURPOSE:To manufacture a sol of an inorg.-org. composite body with superior stability and flowability for a film with superior heat resistance and toughness by combining limitedly swellable mica having a specified composition contg. fluorine wit org. molecules. CONSTITUTION:A synthetic melt of limitedly swellable mica contg. fluorine is converted into hydrated fine particles by a known method such as immersion in water or weathering in steam, and the particles are reacted with org. cations from alkylamine or the like in an aqueous soln. of 1-6 pH. After carrying out ion exchange, the residual org. cations and Na+ are removed, and the resulting sol-like org.-inorg. composite body holding a large amount of water between laminae is cleaved with a mixer or the like until a sol having =10cps viscosity measured with a rotational viscometer is prepd. Thus, a sol contg. settleable particles having 0.1-15mum average particle size and a composition represented by formula 1 is obtd. When a 1-20% soln. of the sol is spread on a substrate with lubricity in a uniform thickness by casting or spraying, a tough film for electric insulation or other use is manufactured.