Toho Rayon Co., Ltd.

Toho Belson Co., Ltd.

Yasuhisa Nagata

Hiroyuki Kosuda

Tsuyoshi Minamisawa

Yasuo Kogo

Yoshihiro Endoh

Masato Andoh

(1) A carbon film derived from a polyimide film, which has a tensile strength of at least 15 Kgf/mm.sup.2, a tensile modulus of elasticity of at least 5000 Kgf/mm.sup.2 and an electric conductivity of at least 200 S/cm. (2) A process for preparing a carbon film which comprises the following steps:

Carbon film and process for preparing the same

A polyamic acid composite comprising i) a polyamic acid having three dimensional network molecular structure obtained by a ring-opening polyaddition reaction of a tetracarboxylic acid dianhydride with an aromatic diamine and a tri- or tetramino compound and ii) (a) a high polymer component having a different molecular structure from the polyamic acid, which is dispersed in the three dimensional network molecular structure of the polyamic acid and of which molecular chains are interpenetrated with molecular chains of the polyamic acid or (b) a curable resin composition which is dispersed in the three dimensional network molecular structure of the polyamic acid and which is capable of forming a cured resin of which molecular chains are interpenetrated with molecular chains of the polyamic acid, and a polyimide composite obtained from the polyamic acid composite, and process for production thereof.

Polyamic acid composite, polyimide composite and processes for producing

A polyamic acid having a three-dimensional network molecular structure produced by a gel forming ring-opening polyaddition reaction in an organic solvent of the reaction components comprising:

Polyamic acid having three-dimensional network molecular structure,

The resin composition which contains thermosetting resin as Component (A), a thermoplastic resin as Component (B), and at least one compound selected from the group consisting of an epoxy resin capable of dissolving the thermoplastic resin and a reactive diluent possessing at least one epoxy group as Component (C) in a ratio such that the proportions of Components (A), (B), and (C) fall respectively in the ranges of 30 to 96% by weight, 2 to 50% by weight, and 2 to 49% by weight, based on the total weight of the resin composition. The resin composition is capable of producing a molded article combining the highly satisfactory mechanical and thermal properties of a thermosetting resin and the highly satisfactory toughness of a thermoplastic resin.

Resin composition of thermosetting resin and thermoplastic resin

A process for producing a product of carbon fiber reinforced thermoplastic resin comprising immersing carbon fibers in a suspension of a powder of a thermoplastic resin in a liquid medium, which contains at least 20 wt % of an organic liquid and which contains from 0 to 80 wt % water, to impregnate the thermoplastic resin among carbon fibers, and heating the thermoplastic resin deposited on the fibers to melt and form a unitary assembly with carbon fibers.

Method for producing carbon fiber reinforced thermoplastic resin product

A prepreg obtained by impregnating fibers with an epoxy resin composition by a hot melt method is described, wherein the epoxy resin composition comprises components (A), (B), and (C), wherein

Prepregs and method for production thereof

An epoxy resin composition having excellent adhesive and high mechanical strength is disclosed. The composition comprises:

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Shizuoka, Japan

Yasuhisa Nagata