Morgan, Lewis & Bockius LLP
Carbon fiber sizing agent, aqueous dispersion thereof, carbon fiber bundle applied with sizing agent, sheet-like article comprising carbon fiber bundle, and carbon fiber reinforced composite material
The present invention provides: a carbon fiber sizing agent that can obtain a carbon fiber bundle having a superior effect of improving mechanical properties when composited using a resin; an aqueous dispersion thereof; a carbon fiber bundle; a sheet-shaped article having a carbon fiber bundle; and a composite material. The carbon fiber sizing agent contains: a compound (A) that is an ester of an unsaturated monobasic acid and an epoxy compound having a plurality of epoxy groups in the molecule, and that has at least one epoxy group in the molecule; a urethane acrylate oligomer (B) that is bifunctional and that has a tensile elongation rate of the cured product of at least 40%; and a polyurethane resin (C) having a tensile elongation rate of a dried coating film of 350-900% inclusive. The amounts of A-C contained satisfy the conditions described in the description. The aqueous dispersion disperses the sizing agent. The carbon fiber bundle contains 0.6-3.0 mass % inclusive of the sizing agent. The sheet-shaped article and a pultruded composite material contain the carbon fiber bundle. The composite material contains the sheet-shaped article.
Mitsubishi Chemical Corporation
C D C C C D D C D D C
C08J D06M C09D C08J C08L D06M D06M C08J D06M D06M C08L
inventional inventional inventional inventional inventional additional inventional additional inventional inventional inventional
Naoki Kouki Shigekazu Keigo Shuuichi Masahiro
Sugiura Wakabayashi Takeda Yoshida Nakamura Hata