A method for obtaining adhesion of urethane sealant to a painted or glass surface.

摘要

The invention relates to methods for treating painted surfaces or glass surfaces so as to provide improved adhesion of a urethane sealant to such surfaces. It further relates to compositions utilized within these methods for treating such surfaces. Current methodologies require the use of a priming top coat in order to obtain acceptable levels of adhesion. The disclosed methods comprise applying a solution containing p-toluenesulfonic acid, optionally an organofunctional silane, and an appropriate solvent to the painted or the glass surface, the painted surface being cured and devoid of a resin top coating, and thereafter contacting the painted or the glass surface with the urethane sealant. A method for joining painted and glass surfaces using a urethane sealant is also disclosed.