Method of bonding a window to a substrate without a primer

Details Method of bonding a window to a substrate without a primer Method of bonding a window to a substrate without a primer

C - Chemistry, Metallurgy

03

C

C03C 27/04 (2006.01) B08B 7/00 (2006.01) C09J 5/02 (2006.01) C08L 75/04 (2006.01)

Patent

CA 2468661

The invention is a process for bonding glass to a substrate without the need to prime the surface of the substrate. The process comprises, first, treating the surface of the substrate with air plasma, applying to the surface of the substrate or to the surface of the glass an adhesive capable of bonding to the treated substrate and glass, and contacting the glass and the substrate with the adhesive disposed between the substrate and the glass, and allowing the adhesive to cure. Preferably the substrate is coated with a coating. Preferred adhesives are polyurethane or silane functional elastomeric adhesives. The process of the invention allows bonding of glass to a substrate without the need to use a primer on the substrate prior to application of the adhesive. The process is especially effective in facilitating the bonding of glass to coated substrates, especially substrates coated with acid resistant coatings such as PPG's carbamate coating or DuPont's Gen III, IV and IV coatings.

Cette invention concerne un procédé de collage d'une vitre sur un substrat sans application préalable d'une couche d'apprêt. Ce procédé consiste à, dans un premier temps, traiter la surface du substrat avec du plasma d'air ; appliquer sur la surface du substrat ou sur celle du verre un colle capable d'adhérer au substrat ou à la vitre traités ; et mettre la vitre et le substrat en contact avec la colle disposée entre eux et laisser prendre la colle. Le substrat est de préférence recouvert d'un enduit. Les colles préférées sont des colles élastomères fonctionnelles de polyuréthanne ou de silane. Ce procédé permet de coller une vitre sur un substrat sans application préalable d'un apprêt avant application de la colle. Ce procédé convient tout particulièrement pour faciliter le collage de vitres sur des substrats enduits, notamment avec des revêtements résistant aux acides tels que le revêtement au carbamate de PPG et les enduits Gen III, IV et IV de DuPont.

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