A polyurethane-epoxy resin hybrid electrically conductive adhesive, a preparing method thereof and an electrically conductive film

The invention discloses a polyurethane-epoxy resin hybrid electrically conductive adhesive, a preparing method thereof and an electrically conductive film. The adhesive comprises an isocyanate-epoxy resin hybrid (A), a latent epoxy resin curing agent (B), and metal and/or non-metal electrically conductive micropowder (C), wherein the isocyanate-epoxy resin hybrid (A) is prepared through reacting solid epoxy resin the softening point of which is 50-120 DGE C, diisocyanate, polyol and an isocyanate blocking agent, and the polyol is at least one selected from a group consisting of polyester polyol, polyether polyol, polycarbonate polyol and aliphatic diol. The film of the polyurethane-epoxy resin hybrid electrically conductive adhesive has good toughness, high adhesive strength, low resistivity and good thermal impact resistance. 本发明公开了种聚氨酯-环氧树脂杂化导电胶及其制备方法及导电胶膜，所述聚氨酯-环氧树脂杂化导电胶包括如下组分：异氰酸酯-环氧树脂杂化物（A），所述异氰酸酯-环氧树脂杂化物（A）由软化点为50℃～120℃的固体环氧树脂与二异氰酸酯、多元醇、异氰酸酯封闭剂反应制得；潜伏型环氧固化剂（B）；及金属和/或非金属导电微粉（C）；其中，多元醇为聚酯多元醇、聚醚多元醇、聚碳酸酯多元醇