Toray Industries, Inc.

Taiki Maeyama

Hiroaki Sakata

Hiroshi Kobayashi

Naofumi Hosokawa

Takashi Ikushima

Daisuke Kido

Hirokazu Ohnishi

A prepreg having excellent processability and handleability and that can be processed into a cured product with high heat resistance is described along with a method to produce such a prepreg without being restricted by the types and contents of the matrix resin components used, where the prepreg includes at least components [A] to [D] as defined below and a preliminary reaction product that is a reaction product of the component [B] and the component [C]: [A] carbon fiber, [B] epoxy resin comprising a m- or p-aminophenol epoxy resin [b1] and either a glycidyl ether epoxy resin or a glycidyl amine epoxy resin [b2] that has two or more glycidyl groups in a molecule, [C] curing agent, and [D] thermoplastic resin.

Prepreg, method for producing same, and slit tape prepreg

A prepreg having high processability and laminating performance and a method to produce such a prepreg is described, the prepreg comprising at least the components [A] to [E] shown below, and having a structure incorporating a first layer composed mainly of the component [A] and a first epoxy resin composition that contains the components [B] to [D] but which is substantially free of the component [E], and a second layer composed mainly of a second epoxy resin composition that contains the components [B] to [E],

Prepreg and production method therefor, slit tape prepreg, carbon fiber-reinforced composite material

A prepreg is provided that has excellent processability and handleability and that can be processed into a cured product with high heat resistance. Also provided is a method to produce such a prepreg in an industrially advantageous way without being restricted by the types and contents of the matrix resin components used. The prepreg includes at least components [A] to [D] as given below and a preliminary reaction product that is a reaction product of the component [B] and the component [C], at least one surface resin in the prepreg having a storage elastic modulus G' in the range of 1.0&#xd7;10to 2.0&#xd7;10Pa as measured at a temperature of 40&#xb0; C. and an angular frequency in the range of 0.06 to 314 rad/s: [A] carbon fiber, [B] epoxy resin, [C] curing agent, and [D] thermoplastic resin.

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Ehime, Japan

Taiki Maeyama