Cationic surface coating of flat glass
AssigneePilkington Brothers Limited
InventorBrian Evans
Life of this patent
Estimating the term…
Abstract
A method of treating flat glass to reduce its vulnerability to scratching, e.g. during storage and/or transit, wherein a transparent film of a cationic surface active agent is adsorbed on the glass by applying an aqueous solution of the surface active agent to the glass on the production line and drying the glass. The solution may be applied to the glass after is has been washed, near the end of the production line, using for example an anionic surface active agent as detergent. Alternatively, a solution containing both a cationic surface active agent and an nonionic surface active agent as detergent may be applied to the glass to wash it, followed by rinsing with water and drying.
Claims23
A method for treating flat glass to reduce its vulnerability to scratching which comprises the steps of advancing the glass along a production line on which the glass has been made to a treatment station forming part of the production line, applying an aqueous solution which consists of a cationic surface active agent to at least one major surface of the glass at the treatment station, and thereafter removing the glass from the treatment station and drying the glass so as to leave a transparent film consisting of surface active agent adsorbed on the glass surface.
A method for treating flat glass to reduce its vulnerability to scratching which comprises the steps of advancing the glass along a production line on which the glass has been made to a treatment station forming part of the production line, applying an aqueous solution which consists of a cationic surface active agent and a non-ionic surface active agent to at least one major surface of the glass at the treatment station, and thereafter removing the glass from the treatment station and drying the glass so as to leave a transparent film consisting of surface active agent adsorbed on the glass surface.
Dependencies are inferred from the claim text.