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Water-repellent glass and process for preparing same

  • US 6,210,750 B1
  • Filed: 12/31/1998
  • Issued: 04/03/2001
  • Est. Priority Date: 06/26/1997
  • Status: Expired due to Term
First Claim
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1. 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.

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