Subaru Corporation

Adeka Corporation

Jx Nippon Oil Energy Corporation

Jxtg Nippon Oil & Energy Corporation

Fuji Jukogyo Kabushiki Kaisha

Asahi Denka Co., Ltd.

Yoshihiro Fukuda

Takahiro Mori

Naoyuki Sekine

Masaki Minami

Takayuki Matsumoto

Masanori Nakajima

Yoshinori Takahata

Seiichi Saito

Mitsunori Ide

Yuichiro Deguchi

Eikatsu Yamaguchi

Hiroyasu Ihara

Takeru Ohtsu

Setsuko Hirakawa

The purpose of the present invention is to inhibit a decrease in strength attribute to the interface between a simple-shape portion and a complicated-shape portion. This fiber-reinforced resin composite material comprises: a simple-shape portion formed from at least one sheet-shaped prepreg material obtained by impregnating reinforcing fibers with a resin; and a complicated-shape portion obtained by impregnating reinforcing fibers with a resin, the complicated-shape portion having been integrated with the simple-shape portion. The resin used for the prepreg material comprised the same components as the resin used for the complicated-shape portion.

Fiber-reinforced resin composite material and method for producing same

A prepregcomprises: a reinforcing fiber layerincluding reinforcing fibersand a resin compositionwith which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and surface layersandprovided on the surfaces of the reinforcing fiber layerand containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particleshaving an average particle size of 5 to 50 &#x3bc;m, wherein the polyamide resin particlesinclude the polyamide 1010 resin particle.

Prepreg, fiber-reinforced composite material, and resin composition containing particles

A production method for a fiber-reinforced composite material comprises: a step of stacking a prepreg plurally to obtain a prepreg-stacked body; and a step of heating the prepreg-stacked body to cure a resin, wherein the prepreg comprises: a reinforcing fiber layer including reinforcing fibers and a resin composition with which the space between fibers of the reinforcing fibers is impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layer provided on at least one surface of the reinforcing fiber layer and containing (A) to (C) components, and (D) polyamide resin particles having an average particle size of 5 to 50 &#x3bc;m.

Production method for fibre-reinforced composite material, prepreg, particle-containing resin composition, and fibre-reinforced composite material

A fiber-reinforced composite material is provided which is capable of achieving CAI, ILSS, and interlaminar fracture toughness concurrently at high levels, in particular, capable of achieving high CAI. The composite material is composed of a laminated body including a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, wherein the resin layer is a layer wherein a cured product of a compound having in its molecule a benzoxazine ring of formula (1) and epoxy resin is impregnated with at least polyamide 12 powder: (R: C1-C12 chain alkyl group or the like; H is bonded to at least one of the carbon atoms of the aromatic ring at ortho- or para-position with respect to C to which the oxygen atom is bonded).

Fiber-reinforced composite material

A prepregcomprises: a reinforcing fiber layerincluding reinforcing fibersand a resin compositionwith which the space between fibers of the reinforcing fibersis impregnated and which contains (A) a benzoxazine resin, (B) an epoxy resin, and (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule; and a surface layerorprovided on at least one surface of the reinforcing fiber layerand containing (A) a benzoxazine resin, (B) an epoxy resin, (C) a curing agent having 2 or more phenolic hydroxy groups in a molecule, and (D) polyamide resin particleshaving an average particle size of 5 to 50 &#x3bc;m, wherein the polyamide resin particlesinclude a particle made of a polyamide

A curable resin composition which comprising (A), (B) and (C) as follows: (A) 100 parts by mass of polyfunctional epoxy component which contains (A1) a trifunctional epoxy compound having three glycidyl groups in a molecule and (A2) a tetrafunctional epoxy compound having four glycidyl groups in a molecule, wherein (A1):(A2) is 10:90 to 90:10 in terms of mass; (B) 25 to 200 parts by mass of a cyanic acid ester compound having two or more of cyanato groups; and (C) 0.5 to 20 parts by mass of an imidazole compound as a curing agent.

Curable resin composition, resin composition, resin sheet formed by using said curable resin composition and resin composition, and cured materials thereof

The epoxy resin composition of the present invention is characterized in that a polyamide compound having a moiety derived from a hydroxyl substituted aromatic amine having a phenolic hydroxyl group adjacent to an amino group is used as an epoxy resin hardener.

Hardenable epoxy resin composition

A composite material obtained by laminating (A) a layer formed from an epoxy resin curing composition and (B) a layer of a polyimide to each other. The composite material is preferably obtained by applying the epoxy resin curing composition to at least one side of a polyimide film or sheet. The epoxy resin curing composition includes a curing agent containing a polyamide compound having a repeat unit comprising a phenolic hydroxyl group containing structure represented by the following formula (I) or (II): In formula (I), ring A and R each represent a phenylene group or a naphthylene group, each of which may be substituted with a halogen atom, a hydroxyl group or an alkyl group having 1 to 4 carbon atoms. In formula (II), ring B is an arylene group having 6 to 18 carbon atoms or an alkylidenediarylene group having 13 to 25 carbon atoms, each of which may be substituted with a halogen atom, a hydroxyl group or an alkyl group having 1 to 4 carbon atoms.

Composite material

An epoxy resin curable composition for a prepreg, comprising the following components (A) to (E): (A) a polyamide compound having a structure derived from an aromatic diamine including a phenolic hydroxyl group, the aromatic diamine having the phenolic hydroxyl group in a position adjacent to an amino group; (B) an epoxy resin; (C) an epoxy resin curing agent; (D) a filler; and (E) a solvent.

Epoxy resin curable composition for prepreg

An epoxy resin composition which comprises 100 parts by weight of an epoxy resin and 1 to 800 parts by weight of an aluminum borate whisker having an average fiber diameter of 0.25 &#x3bc;m or less. The epoxy resin composition contains a large amount of the aluminum borate whisker being dispersed uniformly therein, is excellent in mechanical strength, and is suppressed with respect to the anisotropy of a mechanical property due to the direction of application.

Growing community of inventors

Tokyo, Japan

Yoshihiro Fukuda