Chitosan-coated hydrophobic glass and method of making

Details Chitosan-coated hydrophobic glass and method of making Chitosan-coated hydrophobic glass and method of making

C - Chemistry, Metallurgy

03

C

C03C 17/00 (2006.01) C03C 17/28 (2006.01)

Patent

CA 2755922

Glass surfaces, for example, windshield surfaces, have a durable hydrophobic coating applied thereto. The glass surface is first treated by any suitable method to enhance the ability of a chitosan polymer coating to durably or substantially permanently adhere thereto. Once the chitosan coating has been applied to the glass surface, the normally hydrophilic chitosan coating is rendered hydrophobic by suitable treatment, for example, by a combination of enzymatic and chemical treatments. Alternatively, the chitosan may be rendered hydrophobic prior to coating it on the glass surface, but that is a less preferred technique. The method of the invention provides a glass article having a hydrophobic surface.

L'invention concerne des surfaces en verre, par exemple des surfaces de pare-brise, auxquelles on applique un revêtement hydrophobe durable. La surface en verre est d'abord traitée par n'importe quel procédé approprié pour renforcer l'aptitude d'un revêtement polymère de chitosane à y adhérer durablement ou de manière sensiblement permanente. Une fois le revêtement de chitosane appliqué à la surface en verre, le revêtement de chitosane normalement hydrophile est rendu hydrophobe par un traitement approprié, par exemple par une combinaison de traitements enzymatiques et chimiques. Autre variante, le chitosane peut être rendu hydrophobe avant d'en revêtir la surface en verre, mais cette technique est moins préférée. Le procédé selon l'invention permet de produire un article en verre ayant une surface hydrophobe.

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