Patent ID: 7807016

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 comprises a mixture of about 1 to about 20 parts by weight of an adhesion promoter, which is an adduct prepared by the reaction of at least one aromatic polyisocyanate compound which includes a thiophosphate group, with the active hydrogen of an organofunctional silane selected from an amino-silane having 1 or 2 silyl groups, a mercapto-silane, or a combination thereof, and about 80 to about 99 parts by weight of at least one prepolymer having free isocyanate content derived from the reaction of at least one aliphatic polyisocyanate and a polyetherpolyol, wherein the prepolymer is partially reacted with an active hydrogen atom of an organosilane, wherein the organosilane includes two or three alkoxy groups bound to each of the one or two silicon atoms; b. applying an adhesive to at least one of the substrates; and c. assembling the two substrates.