Process for manufacturing a glass article having a durably water-repellent surface

• Main Authors: HONG BYUNG SUN, HAN JOO HUN
• Format: Patent
• Language: English
• Published: 18.09.2001
• Edition: 7
• Subjects: ADHESIVES; CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; CORRECTING FLUIDS; DYES; FILLING PASTES; GLASS; INKS; JOINING GLASS TO GLASS OR OTHER MATERIALS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MINERAL OR SLAG WOOL; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS THEREFOR; WOODSTAINS

A water-repellent glass having a durable and abrasion-resistant silica layer is prepared by a process containing the following steps:(a) preparing a silica solution by subjecting a metal alkoxide-based silane compound to a two step aging process wherein the two step aging process is proceeded either by conducting a first aging step under a basic condition and a second aging step under an acidic condition or vice versa,(b) applying the resulting silica composition onto the surface of a glass substrate,(c) subjecting the glass substrate coated with the silica composition to a thermal treatment, and(d) coating the resulting coarse silica layer with a water-repellent layer.