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Dow patents amphiphilic block copolymer-modified epoxy resin

Published November 10, 2011
Patent No. U.S. 7,820,760 B2
Dow Global Technologies Inc. has obtained a patent for a curable adhesive epoxy resin composition comprised of an epoxy resin; 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 is comprised of at least one polyether structure provided that the polyether structure of the 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 the amphiphilic polyether block copolymer; and 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.

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