Patent ID: 6210750
Filing Date: 2001-04-03
Classification: C03C,C08G,C09D,Y10T

Abstract:
A process for the preparation of a water-repellent glass which comprises:(a) preparing a colloidal silica suspension by hydrolyzing and polycondensing an alkoxysilane in an organic solvent under a basic condition in the presence of water, and then treating the colloidal silica suspension under an acidic condition, to obtain a silica dispersion containing cross-linked spherical silica particles and linear polysiloxane,(b) combining the silica dispersion with a mixed solvent composed of acetic acid and an alcohol to obtain a coating composition,(c) applying the coating composition on the surface of a glass substrate to form a silica layer therefrom,(d) heat treating the silica layer to provide a silica film on the glass substrate, and(e) applying a water-repellent agent on the silica film to provide the water-repellent glass plate.