| abstract |
(57) [Summary] [Problem] To provide carbon fiber with stable processability, Moreover, not only epoxy resin but also acrylic resin, unsaturated polyester resin, good impregnating property of matrix resin by radical polymerization resin such as vinyl ester resin, An object of the present invention is to provide a carbon fiber sizing agent having excellent properties of adhesion between these matrix resins and carbon fibers. SOLUTION: A sizing agent for carbon fibers mainly comprising a compound represented by the following formula (1). Embedded image ... Formula (1) [In Formula (1), A and B are selected from a vinyl group, an acryloyl group, a methacryloyl group, an epoxy group, a cycloaliphatic epoxy group, a carboxyl group, and a phenolic hydroxyl group. An organic residue having one functional group And B may be the same. X is a hydrocarbon group. ] |