초록 ▼

A window panel assembly to be bonded to a vehicle body opening using a conventional, window fixing urethane adhesive disposed between the vehicle pinch-weld flange and a polymeric gasket attached to the window panel. The joint produced between the window fixing adhesive and the polymeric gasket has

A window panel assembly to be bonded to a vehicle body opening using a conventional, window fixing urethane adhesive disposed between the vehicle pinch-weld flange and a polymeric gasket attached to the window panel. The joint produced between the window fixing adhesive and the polymeric gasket has a bond strength and performance greater than that achieved in conventional metal-to-glass bonds using the same fixing adhesive. The panel assembly of this invention may be sent to the automobile manufacturer so that all the installer needs to do is apply the window fixing adhesive between the gasket and the vehicle in a conventional manner. The strong bond can be achieved even after the panel assembly has been in storage for days, weeks, or even several months prior to installation. The panel assembly includes a gasket bonded to a sheet-like panel and having a surface adapted to receive a window fixing adhesive for bonding the sheet-like panel in the vehicle opening. An adhesion-promoting compound is applied to the gasket surface and heated to a transition temperature of at least about 60.degree. C. When raised to at least this temperature, the adhesion-promoting compound and gasket bond with the fixing adhesive when the window panel assembly is installed. A load exerted on the joint sufficient to cause a failure results in a cohesive failure of the gasket, the fixing adhesive, or both, but not of the adhesion between the gasket and fixing adhesive. A method is also provided for making the panel assembly of this invention.

대표청구항 ▼

[ We claim:] [1.] In combination, a window panel assembly retained on a vehicle body adjacent an opening in said vehicle body, said combination comprising:a vehicle body having an opening therein;a window panel assembly including a window panel having opposite sides terminating in a peripheral edge,

[ We claim:] [1.] In combination, a window panel assembly retained on a vehicle body adjacent an opening in said vehicle body, said combination comprising:a vehicle body having an opening therein;a window panel assembly including a window panel having opposite sides terminating in a peripheral edge, and a polymeric gasket bonded to at least one side of said window panel and having a surface to receive a window fixing adhesive for bonding said window panel to said vehicle body;an adhesion-promoting compound on said gasket surface; anda window fixing adhesive applied to said gasket surface on said adhesion-promoting compound;said adhesion-promoting compound having a transition temperature of at least 60.degree. C. at or above which said adhesion-promoting compound exhibits improved adhesion qualities between said gasket and said window fixing adhesive, said adhesion-promoting compound being heated to a temperature equal to or greater than about 60.degree. C. prior to receiving said window fixing adhesive;said window fixing adhesive positioned between said adhesion-promoting compound on said gasket and a portion of said vehicle body;said window panel assembly being bonded to said vehicle body portion adjacent said opening by said window fixing adhesive such that said window panel extends over said opening, said adhesion-promoting compound after said heating to said transition temperature providing improved bond strength between said gasket and said window fixing adhesive as compared to the bond strength achieved without heating said adhesion-promoting compound to said transition temperature.