Patent ID: 8278388

Claim:
A resin composition comprising a resin and polymer particles, wherein, the resin is a cycloaliphatic epoxy resin, the polymer particles have a core-shell structure containing at least two layers consisting of an elastic core layer made of a rubbery polymer, which elastic core layer is present in the inner side thereof, and a shell layer made of a hard polymer, which shell layer is present in the outermost side thereof, the polymer particles are obtained by polymerizing 5 to 100 parts by weight of hard polymer-constituting components in the presence of 100 parts by weight of the rubbery polymer to form the hard polymer having a glass transition temperature of higher than 0° C. on the rubbery polymer, the rubbery polymer has a glass transition temperature of 0° C. or lower and is obtained by polymerizing rubbery polymer-constituting components consisting of 20% to 100% by weight of a (meth)acrylic acid ester having a phenoxy group, 0% to 80% by weight of an alkyl acrylic acid ester having an alkyl group of 2 to 18 carbon atoms, and 0% to 30% by weight of a monomer copolymerizable with these esters, the polymer particles have a volume average particle diameter (Mv) of not smaller than 0.01 μm and not larger than 0.5 μm, and the resin composition comprises 100 parts by weight of the cycloaliphatic epoxy resin and 1 to 60 parts by weight of the polymer particles.