Patent ID: 7691479

Claim:
A method for bonding a first substrate to a second substrate, comprising the steps of: a. applying to one or both of the substrates a primer composition that includes i, ii, iii, and iv as defined below i. an adhesion promoter, which is an adduct prepared by the reaction of at least one aromatic polyisocyanate compound, with an active hydrogen containing moiety of an organofunctional silane; ii. a prepolymer derived from the reaction of at least one aliphatic polyisocyanate and a polyol, and is at least partially reacted with an active hydrogen containing moiety of an organofunctional silane; iii. optionally, a solvent; iv. an isocyanate functional prepolymer with an isocyanate content greater than about 1%, and being the reaction product of a polyol and an aromatic polyisocyanate wherein the polyol has a functionality of greater than about 2 and a molecular weight (M n ) greater than about 300; and b. applying an adhesive to at least one of the substrates; and c. assembling the two substrates.