POLYSILICATE BINDER FOR SILICATE PAINTS

Abstract

Information is given on the structure and properties of a polysilicate binder obtained by mixing a silicic acid sol with a liquid glass. It was found that the introduction of a silicic acid sol in a liquid glass promotes an increase in the fraction of high-polymer fractions of silicic anions. An increase in the sol content promotes an increase in the fraction of high-polymer fractions of silicic anions. The results of the kinetics of the change in the silica content in the monomeric form in the potassium and sodium polysilicate solution are given. It was found that the dependence of the silica content in the monomeric form in the early stages of the interaction of the silicic acid sol with liquid glass is extremely extreme. It has been shown that when the potassium liquid glass is mixed with silica sol, the formation of silica in the monomeric form proceeds more slowly at the initial stage than in the sodium liquid glass. The results of studying the structure of polysilicate solutions by the method of violation of total internal reflection are presented. IR-spectroscopy revealed a shift in the band corresponding to Si-O-Si vibrations to the region of higher frequencies compared to liquid glass, which indicates a higher degree of polymerization of silica. The presence of silica in the polysilicate binder polymeric species is established, which ensures an increase in the stability of silicate coatings. Information on the properties of silicate composition with the use of polysilicate film-forming and coatings based on it is given. The composition is intended for interior and exterior walls of buildings.