Resin composition and organic-electrolyte battery

A resin composition comprising

• (A) an epoxy resin comprising at least (E1) an epoxy resin having an aromatic ring and an alicyclic skeleton, and (E2) a rubber-like core-shell polymer-modified epoxy resin;
• and
• (B) a latent curing agent and
• (C) a co-curing agent
• wherein, (E2) the rubber-like core-shell polymer-modified epoxy resin comprises a rubber-like core-shell polymer, and
• wherein, the rubber-like core-shell polymer is a polymer which can be obtained by graft-polymerizing 50-95 wt % of (X-1) rubber particulate core and 5-50 wt % of (X-2) shell layer, and
• wherein, the (X-1) rubber particulate core is selected from the group consisting, of (i) a rubber elastic body, (ii) a polysiloxane rubber-based elastic body, and mixtures thereof, and
• wherein, the (i) rubber elastic body is constituted by not less than 50 wt % of one or more kinds of monomers selected from the group consisting of a diene-based monomer and a (meth)acrylate ester monomer, and less than 50 wt % of other copolymerizable vinyl monomer, and
• wherein, the (X-2) shell layer is constituted by one or more kinds of monomers selected from the group consisting of (meth)acrylate ester, aromatic vinyl, vinyl cyanide, epoxyalkylvinylether, unsaturated acid derivative, (meth)acrylamide derivative and maleimide derivative, and,
• wherein (C) the co-curing agent comprises dicyandiamide.