C - Chemistry – Metallurgy – 03 – C
Patent
C - Chemistry, Metallurgy
03
C
C03C 17/42 (2006.01) C03C 17/22 (2006.01) C03C 17/30 (2006.01) G02B 6/24 (2006.01) G02B 6/25 (2006.01) G02B 6/42 (2006.01)
Patent
CA 2107283
ABSTRACT The invention relates to a process for strengthening the surface of a humidity sensitive glass article, characterized in that it comprises: (A) bringing the surface to be strengthened into contact with an aqueous solution of an acid and the product of the hydrolysis of a silane containing at the same time hydrolyzable groups linked to the silicon and a functional group insensitive to the acid; then (B) bringing the surface to be strengthened into contact with an alkaline aqueous solution of sodium silicate and/or potassium silicate; and (C) drying and hardening the coating applied on the surface of the glass as the result of steps (A) and (B). Application to the production of optical fiber couplers and composite lenses.
Corning Incorporated
Gowling Lafleur Henderson Llp
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