Abstract: A prepreg is described having good handleability and a low resin flow, facilitating the work in the process of a molded body and improving the dimensional accuracy of the molded body, where the prepreg includes a fiber substrate; and a resin layer containing a thermosetting resin composition containing at least components [A] and [B] below, stacked on one surface of the fiber substrate, wherein the fiber substrate is impregnated with a part of the thermosetting resin composition of the resin layer, the thermosetting resin composition having a complex viscosity ?3*24 at 24° C. of 20,000 to 100,000 Pa·s and a complex viscosity ?3*70 at 70° C. of 100 to 5,000 Pa·s, and a volatile amount of the thermosetting resin composition is 1 mass % or less when a total mass of the prepreg is 100 mass %.

Abstract: A surface protect material is described that is high in UV resistance, able to protect the surface of the prepreg used as the parent material, able to prevent a fiber composite material from being deteriorated by UV, able to prevent defects during painting, able to serve for control of the resin flow, and is low in the volatilization percentage during curing, where the surface protect material is a coating agent for spraying or manual application comprising an epoxy resin composition containing at least the components [A] to [D]: [A] non-aromatic epoxy resin, [B] pigment having an number average particle size of 0.1 to 10 ?m, [C] non-aromatic thermoplastic resin, and [D] cationic curing agent or anionic curing agent.

Abstract: A thermosetting resin composition at least including: [A] an epoxy resin containing two or more glycidyl groups; [B] a cyanate ester resin containing two or more cyanate groups; and [C] an amine compound; and satisfying the following conditions (1) and (2): (1) 0.25?the number of moles of glycidyl groups in the thermosetting resin composition/the number of moles of cyanate groups in the thermosetting resin composition?1.5; and (2) 0.05?the number of moles of active hydrogen contained in the amino groups in the thermosetting resin composition/the number of moles of cyanate groups in the thermosetting resin composition<0.5; and a prepreg and a fiber reinforced composite material using the thermosetting resin composition.

Abstract: A thermosetting resin composition at least including: [A] an epoxy resin containing two or more glycidyl groups; [B] a cyanate ester resin containing two or more cyanate groups; and [C] an amine compound; and satisfying the following conditions (1) and (2): (1) 0.25?the number of moles of glycidyl groups in the thermosetting resin composition/the number of moles of cyanate groups in the thermosetting resin composition?1.5; and (2) 0.05?the number of moles of active hydrogen contained in the amino groups in the thermosetting resin composition/the number of moles of cyanate groups in the thermosetting resin composition<0.5; and a prepreg and a fiber reinforced composite material using the thermosetting resin composition.