Water repellent surface treatment for plastic and coated...

Details Water repellent surface treatment for plastic and coated... Water repellent surface treatment for plastic and coated...

C - Chemistry, Metallurgy

08

J

C08J 7/04 (2006.01) C03C 17/00 (2006.01) C03C 17/30 (2006.01) C03C 17/32 (2006.01) C09K 3/18 (2006.01)

Patent

CA 2161275

An article having a durable non-wetting surface is disclosed wherein a plastic substrate surface is first treated by deposition of a silica primer layer. The plastic substrate surface bearing the silica primer layer is then treated with a composition comprising a perfluoroalkylalkylsilane and, optionally, a fluorinated olefin-telomer. The perfluoroalkylalkylsilane provides the non-wetting surface property, while the silica primer layer provides durability to the non-wetting surface property. A method of producing a durable non-wetting surface on a plastic surface is also disclosed, comprising depositing a silica primer layer on a surface of the plastic substrate, and then contacting the silica primer layer with a perfluoroalkylalkylsilane composition. The silica primer layer is preferably deposited by applying to the plastic substrate surface a solution of a hydrolyzable silicon-containing compound, such as tetrachlorosilane, which hydrolyzes and condenses to form a silica-containing film.

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