Optically clear hydrophobic coating composition

C - Chemistry – Metallurgy – 09 – D

Patent

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C09D 183/04 (2006.01) C03C 17/30 (2006.01) C04B 41/48 (2006.01) C04B 41/49 (2006.01) C09D 183/08 (2006.01) C09K 3/18 (2006.01) C23C 26/00 (2006.01)

Patent

CA 2180137

An optically clear hydrophobic coating is prepared by combining in the presence of water fluorinated polysiloxane having multiple hydrolyzable side groups selected from the group including alkyl, aryl, or alkoxy groups having from one to four carbon atoms, with polysiloxane, with polyester modified polysiloxane, with acid, and with alcohol. The polysiloxane ingredients are combined and blended together. The acid and alcohol ingredients are combined together and mixed with the polysiloxane ingredients. The polysiloxane ingredients undergo hydrolysis and polycondensation/polymerization reactions to form a fluorinated polyester modified polysiloxane polymer that when applied to a substrate surface cures at ambient temperatures to form a durable, weather, chemical and heat resistant, optically clear hydrophobic protective coating.

On prépare un revêtement hydrophobe optiquement transparent en combinant en présence d'eau un polysiloxane fluoré possédant plusieurs groupes latéraux hydrolysables sélectionnés dans le groupe comprenant des groupes alkyle, aryle ou alcoxy possédant de 1 à 4 atomes de carbone, avec un polysiloxane, avec un polysiloxane modifié par polyester, avec de l'acide, et avec de l'alcool. On combine et on mélange tous les ingrédients polysiloxane. On combine et on mélange les ingrédients acide et alcool avec les ingrédients polysiloxane. Les ingrédients polysiloxane sont soumis à l'hydrolyse et à des réactions de polycondensation/polymérisation afin de former un polymère de polysiloxane fluoré modifié par polyester qui, lorsqu'il est appliqué sur une surface d'un substrat, durcit à des températures ambiantes afin de former un revêtement protecteur hydrophobe optiquement transparent, durable, résistant aux intempéries, aux produits chimiques et à la chaleur.

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