JP2005105152A - Fullerene-containing prepreg - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a prepreg enabling improvement of flexural properties such as three-point flexural strength of a flat plate, three-point flexural modulus of the flat plate and three-point flexural strength of a pipe as well as compressive properties while keeping impact resistance such as Charpy impact strength of a fiber-reinforced plastic (FRP) after curing. <P>SOLUTION: The fullerene-containing prepreg is obtained by impregnating a resin composition into a carbon fiber reinforcing material, and the resin composition comprises a thermosetting resin and fullerene in an amount of 0.05-8 pts mass based on 100 pts mass of the thermosetting resin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a prepreg containing fullerene, and more specifically, a prepreg capable of producing an FRP having excellent physical properties such as impact resistance, compression characteristics and bending characteristics of a fiber reinforced plastic (FRP) product after curing. About.

  A prepreg formed by impregnating a fiber reinforced material with a resin composition (matrix resin) such as a thermosetting resin into a sheet, roving, or woven fabric is used as a material for FRP products such as aircraft, golf shafts, fishing rods, etc. It is used for the reinforcement of concrete bridges and buildings.

  FRP products obtained by curing the prepregs used for these applications have conventionally improved the rigidity of the matrix resin after curing in order to improve the mechanical properties of those compression systems, that is, the strength of the matrix resin after curing. And increasing the elastic modulus has been studied.

  On the other hand, in order to give safety and durability, excellent impact resistance (toughness) and elongation (flexibility) are indispensable, and the stiffness and toughness of the matrix resin after curing, which are mutually contradictory properties Improvement of the resin has been studied while balancing with the flexibility.

  However, it has been difficult to make the cured matrix resin excellent in rigidity, toughness, and flexibility.

  As a solution to these problems, a resin composition in which carbon nanotubes produced by a vapor phase method or the like are blended with an epoxy resin has been proposed (Patent Document 1).

This thing certainly shows a certain physical property value. However, these carbon nanotubes are currently expensive and have a problem of poor dispersion due to entanglement and the like, and improvement of their dispersibility and further improvement of physical properties are required.
JP 2003-12939 A (Claims)

  Among the FRP physical properties after curing, the inventor increases the degree of cross-linking of the matrix resin for the purpose of improving rigidity such as flat plate three-point bending strength, flat plate three-point bending elastic modulus, pipe three-point bending strength, etc. In order to increase the rigidity of the matrix resin after curing and to impart impact resistance (toughness) and elongation (flexibility), studies were made on improving the resin composition.

  Then, the inventors have conceived of blending a specific amount of fullerene into a prepreg obtained by impregnating a carbon fiber reinforcing material with a resin composition. It was found that the FRP obtained by curing this prepreg has high rigidity while maintaining impact resistance, and the present invention has been completed.

  Accordingly, an object of the present invention is to provide a prepreg having excellent FRP physical properties after curing, which solves the above problems.

  The present invention for achieving the above object is as follows.

  [1] A prepreg formed by impregnating a carbon fiber reinforcing material with a resin composition, the resin composition having a content of 0.05 to 8 parts by mass with respect to 100 parts by mass of the thermosetting resin and the thermosetting resin. A fullerene-containing prepreg comprising fullerene.

  [2] The fullerene-containing prepreg according to [1], wherein the fullerene content is 0.05 to 6 parts by mass with respect to 100 parts by mass of the thermosetting resin.

  [3] The fullerene-containing prepreg according to [1], wherein the thermosetting resin is an epoxy resin composed of a bifunctional epoxy resin and a polyfunctional epoxy resin.

  [4] The fullerene-containing prepreg according to [1], wherein the resin composition contains a thermoplastic resin and crosslinked rubber particles having a functional group.

  [5] The fullerene-containing prepreg according to [1], wherein the carbon fiber reinforcing material is a molded body in which carbon fiber bundles constituting the fiber reinforcing material are arranged in one direction, or a carbon fiber woven fabric.

  The fullerene-containing prepreg of the present invention is formed by impregnating a carbon fiber reinforcing material with a resin composition containing a thermosetting resin and fullerene, thereby maintaining the Charpy impact strength of FRP after prepreg curing. On the other hand, it is possible to improve bending characteristics such as flat plate three-point bending strength, flat plate three-point bending elastic modulus, and pipe three-point bending strength, and compression characteristics.

  The fullerene-containing prepreg of the present invention is formed by impregnating a carbon fiber reinforcing material with a resin composition.

[Carbon fiber reinforcement]
The material of the carbon fiber reinforcing material used in the present invention is carbon fiber, and carbon fiber having a tensile strength of 3000 MPa or more and an elastic modulus of 200 GPa or more is preferable.

  The form and arrangement of the carbon fiber reinforcement are not particularly limited, and examples thereof include long fibers arranged in one direction, a single tow, roving, woven fabric, mat, knit, braid and the like. Above all, when using prepregs made of carbon fiber reinforcing material consisting of unidirectional carbon fiber bundles such as long fibers aligned in one direction, single tow, roving, etc., manufacture of tubular or rod-shaped FRP Is preferable.

  The carbon fiber constituting the carbon fiber reinforcing material is not particularly limited as a raw material, but examples thereof include polyacrylonitrile (PAN) -based carbon fiber, pitch-based carbon fiber, and rayon-based carbon fiber. Of these carbon fibers, PAN-based carbon fibers suitable for handling performance and production process passing performance are particularly preferred. Here, the PAN-based carbon fiber is obtained by carbonizing a copolymer containing acrylonitrile structural unit as a main component and containing vinyl monomer units such as itaconic acid, acrylic acid, and acrylic ester within 10 mol%. is there.

(Resin composition)
The resin composition impregnated in the above-mentioned fiber reinforcement contains at least a thermosetting resin and fullerene. Furthermore, a crosslinked rubber particle having a thermoplastic resin and a functional group may be included.

[Thermosetting resin]
Examples of the thermosetting resin to be blended in the resin composition include an epoxy resin, an unsaturated polyester resin, a vinyl ester resin, a phenol resin, and the like. Among these, an epoxy resin has a particularly good balance of heat resistance and physical properties. This is preferred because it provides a composite material.

  Although it will not restrict | limit especially if it is a well-known thing as an epoxy resin, It is preferable to use what combined the polyfunctional epoxy resin and the bifunctional epoxy resin.

  In the present invention, the polyfunctional epoxy resin refers to an epoxy resin having 3 or more epoxy groups in one molecule.

  Examples of the polyfunctional epoxy resin include glycidylamine type epoxy resin, phenol novolac type epoxy resin, triglycidyl paraaminophenyl, tetraglycidyl diaminophenylmethane, cresol novolac type epoxy resin and the like.

  By blending the polyfunctional epoxy resin in the resin composition, FRP having high heat resistance can be obtained when the prepreg is cured. From this heat resistance imparting function, it is preferable to select and blend a polyfunctional epoxy resin such as a novolak type, a trifunctional type or a tetrafunctional type according to the required heat resistance.

  The blending amount of the polyfunctional epoxy resin in the resin composition is preferably 10 to 80 parts by weight, more preferably 20 to 80 parts by weight, and more preferably 30 to 70 parts by weight with respect to 100 parts by weight of the total blending amount of the thermosetting resin. Further preferred.

  When the blending amount of the polyfunctional epoxy resin with respect to 100 parts by weight of the total thermosetting resin is less than 10 parts by weight, the heat resistance of the obtained FRP is lowered, which is not preferable.

  When the compounding amount of the polyfunctional epoxy resin with respect to 100 parts by mass of the total amount of the thermosetting resin exceeds 80 parts by mass, the resulting FRP has high heat resistance, but is preferable because it becomes brittle and impact resistance decreases. Absent. In addition, the polyfunctional epoxy resin is generally expensive, and an increase in the blending amount is not preferable because the cost of the prepreg obtained is increased.

  On the other hand, FRP after curing a prepreg blended with a bifunctional epoxy resin has relatively high elongation and excellent impact resistance, but has slightly low heat resistance.

  The bifunctional epoxy resin is preferably a bisphenol type. For example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, bisphenol S type epoxy resin and the like can be mentioned.

  There are various grades of bifunctional epoxy resins from liquid to solid depending on the difference in molecular weight, and when blended in a resin composition for prepreg, it is possible to adjust the viscosity by appropriately mixing these various grades of resin. .

  The blending amount of the bifunctional epoxy resin in the resin composition is preferably 20 to 90 parts by weight, more preferably 20 to 80 parts by weight, and preferably 30 to 70 parts by weight with respect to 100 parts by weight of the total blending amount of the thermosetting resin. Further preferred.

[Fullerene]
Fullerene blended in the resin composition can be obtained as a commercial product. As a method for producing fullerene, in addition to the well-known production method as described in US Patent 07/930818, the Huffman / Kratchner process described in US Patent 07/930818 and the above-mentioned US Patent 07/930818 are cited. Can be produced by the production method described in [Kratchner, W., Lamb. LD, Fostiropoulos, K. & Huffman, Dr., Nature 347, 354-358 (1990)].

As the fullerene to be contained in the resin composition in the present invention, C ₆₀ having ₆₀ carbon atoms and C ₇₀ having 70 carbon atoms can be used. Further, a mixture composed of C ₆₀ , C ₇₀ and higher order fullerene having 76 or more carbon atoms can also be used.

  The compounding amount of fullerene in the resin composition is 0.05 to 8 parts by mass, preferably 0.05 to 6 parts by mass with respect to 100 parts by mass of the total compounding amount of the thermosetting resin.

  When adding fullerene to the thermosetting resin, there is no particular problem regarding thickening by increasing the blending amount. However, when the blending amount of fullerene is more than 8 parts by mass, the resin composition becomes brittle while mechanical properties relating to rigidity such as strength and elastic modulus and mechanical properties relating to toughness represented by impact resistance are increased. There is a risk of impairing mechanical properties relating to flexibility, and fullerene itself is expensive, which is not preferable. When the amount of fullerene is less than 0.05 parts by mass, the effect of improving the mechanical properties is not exhibited, which is not preferable.

〔Thermoplastic resin〕
The resin composition preferably contains a thermoplastic resin and crosslinked rubber particles having a functional group.

  Examples of the thermoplastic resin include phenoxy resin, polyvinyl formal, polyethersulfone, polyetherimide, polyamide, and the like, but it is preferable to use a phenoxy resin. When a phenoxy resin is blended, the temperature dependency of the viscosity of the resin composition is reduced, and the change in adhesive strength due to temperature (particularly around room temperature) can be reduced. The phenoxy resin is a linear polymer and has excellent compatibility with the thermosetting resin.

  The molecular weight of the phenoxy resin is preferably 10,000 to 50,000. The phenoxy resin has various shapes such as a solid pellet and a powder, but a powder is more preferable in consideration of solubility in a thermosetting resin.

  1-20 mass parts is preferable with respect to 100 mass parts of total compounding quantities of a thermosetting resin, and, as for the compounding quantity of a thermoplastic resin, 5-15 mass parts is more preferable.

[Crosslinked rubber particles having functional groups]
The crosslinked rubber particles having a functional group to be blended in the resin composition are fine particles of a crosslinked rubber having a functional group on the surface. The crosslinked rubber particles are usually used in a state of being uniformly dispersed in a thermosetting resin or partially crosslinked with the thermosetting resin.

  Although there are various functional groups of the crosslinked rubber particles, a carboxyl group, an epoxy group, a hydroxyl group, an amino group, an amide group, and the like are preferable from the viewpoints of compatibility with the thermosetting resin, ease of reaction, and stability. Moreover, the smaller the particle diameter of the crosslinked rubber particles, the better. From the viewpoint of impregnation into the fiber reinforcement, those having a diameter of 10 μm or less are particularly preferred, and those having a diameter of 5 μm or less are more preferred.

  Such crosslinked rubber particles can be obtained, for example, by copolymerizing an unsaturated compound having the above functional group, a crosslinking monomer, a diene monomer, and the like using a known method. Examples of the unsaturated compound having a functional group include acrylic acid, glycidyl methacrylate, vinyl phenol, vinyl aniline, and acrylamide. As the crosslinkable monomer, a compound having a plurality of polymerizable double bonds in the molecule, such as divinylbenzene, diallyl phthalate, and ethylene glycol dimethacrylate can be used.

  Moreover, a commercial item can also be used as a crosslinked rubber particle. For example, FX602 (manufactured by JSR) made of a crosslinked product of carboxyl-modified butadiene-acrylonitrile copolymer can be mentioned. A product in which crosslinked rubber particles are dispersed in an epoxy resin can also be used. Examples of such products include Eposet BPA-323, BPA-307, BPA-601, BPA-604, BPA-607, HDG-31 (manufactured by Nippon Shokubai Co., Ltd.), YR-528, YR. -570, YR-516 (manufactured by Kyoto Chemical Industry Co., Ltd.) and the like.

  The amount of the crosslinked rubber particles is preferably 1 to 25 parts by mass, more preferably 2 to 15 parts by mass with respect to 100 parts by mass of the total amount of the thermosetting resin. When the blending amount of the crosslinked rubber particles is less than 1 part by mass, it is difficult to obtain good surface resin retention and adhesiveness. Conversely, when the blending amount exceeds 25 parts by mass, the resin viscosity increases and it becomes difficult to make a prepreg. However, it tends to lead to a significant decrease in heat resistance, interlaminar shear strength, bending strength, and the like.

[Curing agent]
The resin composition contains a curing agent. As the curing agent, any known compound having an active group capable of reacting with a thermosetting resin can be used. In particular, a compound having an amino group, an acid anhydride group, or an azide group is preferable.

  Examples of the curing agent include dicyandiamide (DICY), diaminodiphenylsulfone, diaminodimethylmethane and various isomers thereof, aminobenzoic acid esters, acid anhydrides and the like. Among these, dicyandiamide is preferable from the viewpoint of storage stability and physical properties.

  As for the compounding quantity of the hardening | curing agent in a resin composition, 0.5-10 mass parts is preferable with respect to 100 mass parts of total compounding quantities of a thermosetting resin.

  Moreover, it is preferable to mix | blend a hardening accelerator. As the curing accelerator, urea derivatives, imidazole compounds, tertiary amine compounds and the like can also be used. In particular, a urea derivative is preferable, and 3- (3,4-dichlorophenyl) -1,1-dimethylurea (DCMU), which is excellent in storage stability and curing acceleration, is particularly preferable.

  Furthermore, other components, for example, inorganic fillers such as silica, thixotropic agents, pigments, and the like can be added to the epoxy resin composition of the present invention.

[Impregnation method]
As a method of impregnating the fiber composition with the resin composition obtained by the above blending conditions, a wet method in which the fiber composition is impregnated by dissolving the resin composition in a solvent such as methyl ethyl ketone and methanol to lower the viscosity. In addition, a known method such as a hot melt method in which a fiber reinforcing material is impregnated by heating the resin composition to lower the viscosity can be used.

  In the wet method, the fiber reinforcing material is dipped in a solution in which the resin composition is dissolved and then pulled up, and the solvent is evaporated using an oven or the like to obtain a prepreg.

  In the hot melt method, a fiber reinforcement is impregnated directly with a resin composition whose viscosity has been reduced by heating, or a film in which the resin composition is coated on release paper or the like is prepared, and then both sides or one side of the fiber reinforcement. From the above, the above-mentioned films are stacked and heated and pressed to impregnate the resin to obtain a prepreg. The hot melt method is preferable because no solvent remains in the prepreg.

  When producing a prepreg by the hot melt method, the viscosity of the resin composition is preferably 0.1 to 10 Pa · s (1 to 100 poise) as the minimum viscosity measured by the method described later.

  As a method for producing FRP using the prepreg of the present invention, a known method can be used. For example, after a prepreg is laminated, the resin can be heated and cured while applying pressure to the laminate, and then can be produced by a method of molding.

  Examples of the heating method while applying pressure include a press molding method, an autoclave molding method, a bagging molding method, a wrapping tape method, and an internal pressure molding method. Among them, it is preferable to use a wrapping tape method or an internal pressure molding method for manufacturing rod-shaped sports members such as golf shafts, fishing rods, and rackets.

  The wrapping tape method can be preferably applied to produce a cylindrical FRP (molded product) such as a golf shaft. The wrapping tape method is a method of forming a cylindrical object by winding a prepreg around a mandrel or the like. Specifically, a prepreg is wound around a mandrel, a wrapping tape made of a thermoplastic resin film is wound around the outside of the prepreg for fixing and applying pressure, the resin is heated and cured in an oven, and then the mandrel Is extracted into a cylindrical fiber-reinforced composite material.

  Further, in producing a cylindrical FRP (molded product) such as a golf shaft, an internal pressure molding method can also be preferably applied. In the internal pressure molding method, a preform in which a prepreg is wound around an internal pressure applying body such as a thermoplastic resin tube is set in a mold, and then a high pressure gas is introduced into the internal pressure applying body and pressure is applied at the same time. Is a method of heating and molding. This method is preferably applied particularly when molding a complicated shape such as a golf shaft, a bat, a racket such as tennis or badminton.

  Hereinafter, the present invention will be described in detail by way of examples.

Examples 1-4 and Comparative Examples 1-2
Each resin composition shown in Table 1 was applied onto release paper using a reverse roll coater to prepare a resin film. Next, two resin films are stacked on both sides of the carbon fiber with the resin-coated surface facing the carbon fiber surface on a sheet-like carbon fiber Beth Fight UT500 (manufactured by Toho Tenax Co., Ltd.) with the fibers aligned in one direction. The resin was impregnated by heating and pressing to obtain a unidirectional prepreg having a carbon fiber basis weight of 125 g / m ² and a resin mass fraction of 25 parts by mass.

  Various physical property values of FRP obtained using each prepreg were measured by the following methods. The results are also shown in Table 1. All physical properties were measured in an environment at a temperature of 23 ° C. and a relative humidity of 50%.

[Three-point bending characteristics of flat plate]
A prepreg having a length of 100 mm, a width of 15 mm, and a thickness of 2 mm was autoclaved at 130 ° C. for 2 hours to obtain an FRP test piece. Based on JIS K7074, the flat plate 3 point bending strength and the flat plate 3 point bending elastic modulus of the obtained test piece were measured.

[Flat plate interlaminar shear strength characteristics (ILSS)]
A prepreg having a length of 14 mm, a width of 10 mm, and a thickness of 2 mm was autoclaved at 130 ° C. for 2 hours to obtain an FRP test piece. Based on JIS K7078, it measured about ILSS of the obtained test piece.

[Plate compression properties]
A prepreg having a length of 78 mm, a width of 12.5 mm, and a thickness of 2 mm was autoclaved at 130 ° C. for 2 hours to obtain an FRP test piece. Based on JIS K7076, it measured about the compressive strength and compression elastic modulus of the obtained test piece.

[Charpy impact strength]
A prepreg having a length of 80 mm, a width of 10 mm, and a thickness of 2 mm was autoclaved at 130 ° C. for 2 hours to obtain an FRP test piece. Based on JIS K 7077, the Charpy impact strength of the obtained test piece was measured.

[Method of manufacturing cylindrical FRP (pipe) bending test piece]
According to the following procedures (a) to (e), it has a laminated configuration of [0 ° ₁₁ (± 45 °) ₃ ] with respect to the axial direction of the cylindrical FRP, the inner diameter is 6.3 mm, and the outer diameter is 9. A cylindrical FRP (test piece) consisting of 9 mm and 17 layers was produced. The mandrel was a stainless steel round bar with a diameter of 6.3 mm and a length of 1000 mm.

  (a) A unidirectional prepreg having a length of 700 mm × width of 65 mm and a fiber direction of + 45 ° with respect to the vertical side, and a rectangle of 700 mm × width of 65 mm and a fiber direction of −45 ° with respect to the vertical side The unidirectional prepreg was laminated by shifting 10 mm in the horizontal direction (corresponding to the half circumference of the mandrel).

  (b) The mandrel obtained by releasing the bonded prepreg so that the longitudinal direction of the prepreg and the axial direction of the mandrel coincide, that is, the angle formed by the fiber direction of the prepreg and the axial direction of the mandrel is ± 45 °. It was wrapped so that

  (c) A prepreg cut into a rectangle of length 700 × width 298 mm was wound on the prepreg so that the longitudinal direction of the prepreg and the axial direction of the mandrel coincided with each other so that the fiber direction was the longitudinal direction.

  (d) Wrapping tape (heat-resistant film tape) was wound and molded by heating at 130 ° C. for 2 hours in a curing furnace.

  (e) After molding, the mandrel was extracted and the wrapping tape was removed to obtain a cylindrical FRP.

[Measurement of bending strength of cylindrical FRP (pipe)]
The three-point bending test method described in “Accreditation Standards and Standard Confirmation Method for Golf Club Shafts” (Edited by Product Safety Association, Minister of International Trade and Industry No. 5 No. 2087, 1993) using the cylindrical FRP molded as described above Based on this, the bending strength was measured. Here, the distance between fulcrums was 300 mm, and the test speed was 35 mm / min.

＊１ フラーレン：混合物組成中６０質量％がＣ₆₀、２５質量％がＣ₇₀、その他１５質量％が炭素数７６以上の高次フラーレンから成る混合物
＊２ Ｅｐ.８２８：ビスフェノールＡ型エポキシ樹脂〔ジャパンエポキシレジン(株)製〕［２官能］
＊３ Ｅｐ.８３４：ビスフェノールＡ型エポキシ樹脂〔ジャパンエポキシレジン(株)製〕［２官能］
＊４ Ｅｐ.１５４：フェノールノボラック型エポキシ樹脂〔ジャパンエポキシレジン(株)製〕［多官能］
＊５ ＥＬＭ−１２０：グリシジルアミン型エポキシ樹脂〔住友化学工業(株)製〕［３官能］
＊６ ＰＫＨＰ−２００：フェノキシ樹脂〔フェノキシスペシャリティーズ(株)製〕
＊７ ＦＸ６０２：架橋ゴム粒子〔ＪＳＲ(株)製〕
＊８ ＤＩＣＹ：ジシアンジアミド［エピキュアＤＩＣＹ−７］〔ジャパンエポキシレジン(株)製〕
＊９ ＤＣＭＵ−９９：硬化促進剤〔保土ヶ谷化学(株)製〕
＊１０ このプリプレグから得られたＦＲＰは、ＩＬＳＳ、圧縮強度、圧縮弾性率は高いが、平板３点曲げ強度、平板３点曲げ弾性率、シャルピー衝撃強度、パイプ曲げ３点強度は低い。

* 1 fullerene: Mixture 60 mass% in the composition is C _60, 25% by weight C _70, other 15 wt% is a mixture consisting of several 76 or more higher fullerenes carbon * 2 Ep.828: bisphenol A type epoxy resin [Japan Epoxy Resin Co., Ltd.] [Bifunctional]
* 3 Ep.834: Bisphenol A type epoxy resin [Japan Epoxy Resin Co., Ltd.] [bifunctional]
* 4 Ep.154: Phenol novolac type epoxy resin [Japan Epoxy Resin Co., Ltd.] [Multifunctional]
* 5 ELM-120: Glycidylamine type epoxy resin [manufactured by Sumitomo Chemical Co., Ltd.] [Trifunctional]
* 6 PKHP-200: Phenoxy resin (Phenoxy Specialties Co., Ltd.)
* 7 FX602: Cross-linked rubber particles [manufactured by JSR Corporation]
* 8 DICY: Dicyandiamide [Epicure DICY-7] [Japan Epoxy Resin Co., Ltd.]
* 9 DCMU-99: Curing accelerator (Hodogaya Chemical Co., Ltd.)
* 10 FRP obtained from this prepreg has high ILSS, compressive strength, and compressive elastic modulus, but low flat plate 3-point bending strength, flat plate 3-point bending elastic modulus, Charpy impact strength, and pipe bending 3-point strength.

  According to Table 1, it is understood that the present invention has the following effects.

  The prepregs of Example 1, Example 2, Example 3 and Example 4 are the three-point bending strength, the three-point bending elastic modulus, the Charpy impact strength, the pipe of the FRP obtained by curing the prepreg. It has a high bending 3-point strength and is a good prepreg as an FRP raw material.

  The prepreg of Comparative Example 1 is an excellent prepreg as an FRP raw material, especially for FRP obtained by curing this, having a low flat plate three-point bending strength, flat plate three-point bending elastic modulus, Charpy impact strength, and pipe bending three-point strength. It wasn't.

  The FRP obtained by curing the prepreg of Comparative Example 2 has low flat plate three-point bending strength, flat plate three-point bending elastic modulus, Charpy impact strength, and pipe bending three-point strength, and is a good prepreg as an FRP raw material. There wasn't.

Claims (5)

A prepreg obtained by impregnating a carbon fiber reinforcing material with a resin composition, the resin composition comprising a thermosetting resin and a fullerene having a content of 0.05 to 8 parts by mass with respect to 100 parts by mass of the thermosetting resin. A fullerene-containing prepreg characterized by comprising. The fullerene-containing prepreg according to claim 1, wherein the fullerene content is 0.05 to 6 parts by mass with respect to 100 parts by mass of the thermosetting resin. The fullerene-containing prepreg according to claim 1, wherein the thermosetting resin is an epoxy resin composed of a bifunctional epoxy resin and a polyfunctional epoxy resin. The fullerene-containing prepreg according to claim 1, wherein the resin composition contains a thermoplastic resin and crosslinked rubber particles having a functional group. The fullerene-containing prepreg according to claim 1, wherein the carbon fiber reinforcing material is a molded body in which carbon fiber bundles constituting the fiber reinforcing material are arranged in one direction, or a carbon fiber woven fabric.