Patent ID: 6740192
Filing Date: 2004-05-25
Classification: C08G,C08L,C09J,H01B,H05K

Abstract:
A method of joining electrically conductive materials comprising the step of applying an electronically conductive adhesive composition to at least one of said electrically conductive materials, wherein the adhesive composition consists of;an epoxide-modified polyurethane resin having the following structure where m is 2 or 3; n is one or greater; R1 is an aliphatic hydrocarbon radical, a cycloaliphatic hydrocarbon radical, an aromatic hydrocarbon radical, or an araliphatic hydrocarbon radical; R2 is an aliphatic hydrocarbon radical, a cycloaliphatic hydrocarbon radical, an alkoxy radical, a polyester, or a polyether; R4 is either: R3 is an aliphatic hydrocarbon radical, a cycloaliphatic hydrocarbon radical, an alkoxy radical, a polyester, or a polyether; and X1, Xâ€²1 and X2 are either a single bond, â€”Oâ€”; â€”COOâ€”; â€”NHâ€”; or â€”Sâ€”; a carboxylic acid anhydride as a cross-linking agent; an adhesion promoter; and a conductive filler; joining the electrically conductive material(s) with the applied adhesive to a substrate; and curing the adhesive.