Patent ID: 7820760

Claim:
A curable adhesive epoxy resin composition comprising (a) an epoxy resin; (b) an amphiphilic block copolymer containing at least one epoxy resin miscible block segment and at least one epoxy resin immiscible block segment; wherein the immiscible block segment comprises at least one polyether structure provided that the polyether structure of said immiscible block segment contains at least one or more alkylene oxide monomer units having at least four carbon atoms; in an amount such that when the epoxy resin composition is cured, the bond strength of the resulting cured epoxy adhesive resin composition increases compared to an epoxy resin composition without said amphiphilic polyether block copolymer; and (c) at least one curing agent; wherein the at least one epoxy resin miscible block segment contains a polyethylene oxide block, a propylene oxide block, or a poly(ethylene oxide-co-propylene oxide) block; and the at least one epoxy resin immiscible block segment contains a polybutylene oxide block, a polyhexylene oxide block, or a polydodecylene oxide block.