Resin composition

A resin composition comprising:

• polymer particles (A);
• and
• a matrix resin (B),
• wherein
• the polymer particles (A) have a graft part and an elastic body,
• the graft part is a polymer that
• (i) (i-a) contains no structural unit containing an aromatic group or
• (i-b) contains, in 100% by weight of the graft part, more than 0% by weight but not more than 10% by weight of a structural unit containing an aromatic group,
• (ii) contains at least one selected from the group consisting of a structural unit derived from alkyl methacrylate and a structural unit derived from alkyl acrylate, and
• (iii) contains no structural unit containing an alkoxy group, no structural unit containing an aryloxy group, no structural unit containing an oxetane group, no structural unit containing a hydroxy group, no structural unit containing an amino group, no structural unit containing an imide group, no structural unit containing a carboxylic acid group, no structural unit containing a carboxylic anhydride group, no structural unit containing a cyclic ester group, no structural unit containing a cyclic amide group, no structural unit containing a benzoxazine group, and no structural unit containing a cyanate ester group, and
• the graft part has a glass transition temperature of −25° C. to 18° C.
• the elastic body contains at least one selected from the group consisting of diene-based rubbers and organosiloxane-based rubbers,
• the diene-based rubbers contain a structural unit derived from a diene-based monomer in an amount of 50% by weight to 100% by weight, and
• the matrix resin (B) comprises at least one type of thermosetting resin selected from the group consisting of epoxy resins, phenolic resins, polyol resins, and amino-formaldehyde resins,
• wherein the epoxy resins comprise at least one selected from the group consisting of bisphenol A epoxy resin, bisphenol F epoxy resin, bisphenol AD epoxy resin, bisphenol S epoxy resin, glycidyl ester type epoxy resin, glycidyl amine type epoxy resin, novolac type epoxy resin, hydrogenated bisphenol A epoxy resin, hydrogenated bisphenol F epoxy resin, fluorinated epoxy resin, flame-resistant epoxy resin, p-oxybenzoic acid glycidyl ether ester type epoxy resin, m-aminophenol type epoxy resin, diaminodiphenylmethane-based epoxy resin, alicyclic epoxy resin, N,N-diglycidyl aniline, N,N-diglycidyl-o-toluidine, triglycidyl isocyanurate.