Patent ID: 7955702

Claim:
A one component long open time primer composition that comprises a base primer composition including (a) an isocyanate functional prepolymer derived from the reaction of an aliphatic polyisocyanate and a polyol, and which is partially reacted with an amino group of a secondary aminosilane, wherein the aminosilane includes two or three methoxy groups bound to silicon, two or three ethoxy groups bound to silicon, or a combination thereof; (b) an isocyanate functional prepolymer with an isocyanate content greater than about 1%, which is the reaction product of an aromatic polyisocyanate and a polyol of Mn>300; and (c) at least one solvent for the components (a) and (b); and an ingredient including an oxazolidine ring or derivative or analog thereof, wherein the primer exhibits an open time of at least about 1 month.